Port bootstrap build on OpenBSD#129080

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Merged
janvorli merged 6 commits into from
Jun 11, 2026
Merged

Port bootstrap build on OpenBSD #129080

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a0f6b36
Port bootstrap build on OpenBSD
am11 Jun 8, 2026
b430572
Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes
am11 Jun 8, 2026
38c5dc1
Address CR feedback
am11 Jun 8, 2026
60e6f5f
Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes
am11 Jun 8, 2026
e92d711
Address CR feedback
am11 Jun 9, 2026
3b78cd0
Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes
am11 Jun 9, 2026
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23 changes: 22 additions & 1 deletion eng/native/configurecompiler.cmake
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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
add_linker_flag(-Wl,--build-id=sha1)
add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
add_linker_flag("-Wl,--build-id=sha1")
# OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
# emulated TLS (don't pass -fno-emulated-tls).
# The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
endif()
if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
add_link_options("LINKER:-lc++abi")
endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
if (NOT DEFINED CLR_ARM_FPU_TYPE)
set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down
8 changes: 7 additions & 1 deletion eng/native/functions.cmake
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Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
find_library(UNWIND NAMES unwind)

if(UNWIND STREQUAL UNWIND-NOTFOUND)
message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
if(CLR_CMAKE_TARGET_OPENBSD)
# On OpenBSD the libunwind symbols are provided by the C++ ABI library
# (libc++abi), so a standalone libunwind is not expected.
set(UNWIND "")
else()
message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
endif()
endif()

set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down
2 changes: 2 additions & 0 deletions src/coreclr/gc/unix/gcenv.unix.cpp
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Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
rlimit addressSpaceLimit;
if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
{
return addressSpaceLimit.rlim_cur;
}
#endif // RLIMIT_AS

// No virtual memory limit
return GetVirtualMemoryMaxAddress();
Expand Down
10 changes: 10 additions & 0 deletions src/coreclr/hosts/corerun/corerun.hpp
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Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down
11 changes: 5 additions & 6 deletions src/coreclr/inc/check.h
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@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down
11 changes: 5 additions & 6 deletions src/coreclr/inc/check.inl
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Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
// SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_

9 changes: 5 additions & 4 deletions src/coreclr/inc/clrtypes.h
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@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
STATIC_CONTRACT_LEAF;
Expand Down
2 changes: 2 additions & 0 deletions src/coreclr/inc/pedecoder.h
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Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down
4 changes: 2 additions & 2 deletions src/coreclr/jit/compiler.hpp
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Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down
4 changes: 2 additions & 2 deletions src/coreclr/jit/jit.h
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Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down
4 changes: 3 additions & 1 deletion src/coreclr/minipal/Unix/doublemapping.cpp
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@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
// Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
// When such a limit is set, GC reserves 1/2 of it, so we need to leave something
// for the rest of the process.
#ifdef RLIMIT_AS
// OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
struct rlimit virtualAddressSpaceLimit;
if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
{
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
}
}
#endif // RLIMIT_AS

// Clip the maximum double mapped memory size to the file size limit
struct rlimit fileSizeLimit;
Expand Down
10 changes: 8 additions & 2 deletions src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets
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Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
<CppLibCreator>ar</CppLibCreator>
<_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
<LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
<LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
<LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
<LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
<LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
<TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
<TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
<TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
<TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

<SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

<ItemGroup>
<NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
<NativeSystemLibrary Include="dl" />
<NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
<NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
<NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
<NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
<NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
<NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
<NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
<NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
<NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
<NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
<NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
<NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
<!-- binskim warning BA3011 The BIND_NOW flag is missing -->
<LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
<LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
<!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
<LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
<!-- this workaround can be deleted once the minimum supported glibc version
(runtime's official build machine's glibc version) is at least 2.33
see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down
6 changes: 6 additions & 0 deletions src/coreclr/nativeaot/CMakeLists.txt
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Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
# OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
# __tls_get_addr, so the runtime must use emulated TLS (like Android).
add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down
5 changes: 4 additions & 1 deletion src/coreclr/nativeaot/Runtime/CMakeLists.txt
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Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
endif()
else()
if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
# OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
# so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
# Keep the cookie in writable memory there, like Apple.
if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
add_definitions(-DFEATURE_READONLY_GS_COOKIE)
endif()
include(unix/configure.cmake)
Expand Down
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Port bootstrap build on OpenBSD#129080

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 Merged

janvorli
merged 6 commits into

from

Jun 11, 2026
 Merged


Port bootstrap build on OpenBSD
#129080
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a0f6b36

Port bootstrap build on OpenBSD


am11 Jun 8, 2026
b430572

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
38c5dc1

Address CR feedback


am11 Jun 8, 2026
60e6f5f

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
e92d711

Address CR feedback


am11 Jun 9, 2026
3b78cd0

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 9, 2026

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23 changes: 22 additions & 1 deletion
eng/native/configurecompiler.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag(-Wl,--build-id=sha1)
 add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
 # OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
 # emulated TLS (don't pass -fno-emulated-tls).
 # The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
 add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
 add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
 if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
 add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 endif()
 if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
 add_link_options("LINKER:-lc++abi")
 endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
 if (NOT DEFINED CLR_ARM_FPU_TYPE)
 set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down

8 changes: 7 additions & 1 deletion
eng/native/functions.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
 find_library(UNWIND NAMES unwind)

 if(UNWIND STREQUAL UNWIND-NOTFOUND)
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 if(CLR_CMAKE_TARGET_OPENBSD)
 # On OpenBSD the libunwind symbols are provided by the C++ ABI library
 # (libc++abi), so a standalone libunwind is not expected.
 set(UNWIND "")
 else()
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 endif()
 endif()

 set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/gc/unix/gcenv.unix.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
 rlimit addressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
 return addressSpaceLimit.rlim_cur;
 }
#endif // RLIMIT_AS

 // No virtual memory limit
 return GetVirtualMemoryMaxAddress();
Expand Down

10 changes: 10 additions & 0 deletions
src/coreclr/hosts/corerun/corerun.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.h

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Original file line numberDiff line numberDiff line change
@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.inl

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Original file line numberDiff line numberDiff line change
Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
 CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
 // SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_


9 changes: 5 additions & 4 deletions
src/coreclr/inc/clrtypes.h

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
 return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
 return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
 return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/inc/pedecoder.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/compiler.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
 return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
 return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/jit.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
 return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
 return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down

4 changes: 3 additions & 1 deletion
src/coreclr/minipal/Unix/doublemapping.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 // Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
 // When such a limit is set, GC reserves 1/2 of it, so we need to leave something
 // for the rest of the process.
#ifdef RLIMIT_AS
 // OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
 struct rlimit virtualAddressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
 }
 }
#endif // RLIMIT_AS

 // Clip the maximum double mapped memory size to the file size limit
 struct rlimit fileSizeLimit;
Expand Down

10 changes: 8 additions & 2 deletions
src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <CppLibCreator>ar</CppLibCreator>
 <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

 <SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

 <ItemGroup>
 <NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
 <NativeSystemLibrary Include="dl" />
 <NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
 <NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
 <NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
 <NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
 <!-- binskim warning BA3011 The BIND_NOW flag is missing -->
 <LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
 <LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
 <!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
 indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
 Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
 <LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
 <!-- this workaround can be deleted once the minimum supported glibc version
 (runtime's official build machine's glibc version) is at least 2.33
 see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down

6 changes: 6 additions & 0 deletions
src/coreclr/nativeaot/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
 set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
 # OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
 # __tls_get_addr, so the runtime must use emulated TLS (like Android).
 add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
 set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down

5 changes: 4 additions & 1 deletion
src/coreclr/nativeaot/Runtime/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
 endif()
else()
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
 # OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
 # so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
 # Keep the cookie in writable memory there, like Apple.
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
 add_definitions(-DFEATURE_READONLY_GS_COOKIE)
 endif()
 include(unix/configure.cmake)
Expand Down
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Merged

janvorli
merged 6 commits into

from

Jun 11, 2026
 Merged


Port bootstrap build on OpenBSD
#129080
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a0f6b36

Port bootstrap build on OpenBSD


am11 Jun 8, 2026
b430572

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
38c5dc1

Address CR feedback


am11 Jun 8, 2026
60e6f5f

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
e92d711

Address CR feedback


am11 Jun 9, 2026
3b78cd0

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 9, 2026

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23 changes: 22 additions & 1 deletion
eng/native/configurecompiler.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag(-Wl,--build-id=sha1)
 add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
 # OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
 # emulated TLS (don't pass -fno-emulated-tls).
 # The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
 add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
 add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
 if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
 add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 endif()
 if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
 add_link_options("LINKER:-lc++abi")
 endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
 if (NOT DEFINED CLR_ARM_FPU_TYPE)
 set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down

8 changes: 7 additions & 1 deletion
eng/native/functions.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
 find_library(UNWIND NAMES unwind)

 if(UNWIND STREQUAL UNWIND-NOTFOUND)
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 if(CLR_CMAKE_TARGET_OPENBSD)
 # On OpenBSD the libunwind symbols are provided by the C++ ABI library
 # (libc++abi), so a standalone libunwind is not expected.
 set(UNWIND "")
 else()
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 endif()
 endif()

 set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/gc/unix/gcenv.unix.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
 rlimit addressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
 return addressSpaceLimit.rlim_cur;
 }
#endif // RLIMIT_AS

 // No virtual memory limit
 return GetVirtualMemoryMaxAddress();
Expand Down

10 changes: 10 additions & 0 deletions
src/coreclr/hosts/corerun/corerun.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.h

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Original file line numberDiff line numberDiff line change
@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.inl

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Original file line numberDiff line numberDiff line change
Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
 CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
 // SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_


9 changes: 5 additions & 4 deletions
src/coreclr/inc/clrtypes.h

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
 return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
 return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
 return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/inc/pedecoder.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/compiler.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
 return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
 return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/jit.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
 return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
 return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down

4 changes: 3 additions & 1 deletion
src/coreclr/minipal/Unix/doublemapping.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 // Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
 // When such a limit is set, GC reserves 1/2 of it, so we need to leave something
 // for the rest of the process.
#ifdef RLIMIT_AS
 // OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
 struct rlimit virtualAddressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
 }
 }
#endif // RLIMIT_AS

 // Clip the maximum double mapped memory size to the file size limit
 struct rlimit fileSizeLimit;
Expand Down

10 changes: 8 additions & 2 deletions
src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <CppLibCreator>ar</CppLibCreator>
 <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

 <SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

 <ItemGroup>
 <NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
 <NativeSystemLibrary Include="dl" />
 <NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
 <NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
 <NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
 <NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
 <!-- binskim warning BA3011 The BIND_NOW flag is missing -->
 <LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
 <LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
 <!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
 indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
 Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
 <LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
 <!-- this workaround can be deleted once the minimum supported glibc version
 (runtime's official build machine's glibc version) is at least 2.33
 see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down

6 changes: 6 additions & 0 deletions
src/coreclr/nativeaot/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
 set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
 # OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
 # __tls_get_addr, so the runtime must use emulated TLS (like Android).
 add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
 set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down

5 changes: 4 additions & 1 deletion
src/coreclr/nativeaot/Runtime/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
 endif()
else()
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
 # OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
 # so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
 # Keep the cookie in writable memory there, like Apple.
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
 add_definitions(-DFEATURE_READONLY_GS_COOKIE)
 endif()
 include(unix/configure.cmake)
Expand Down
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Merged

janvorli
merged 6 commits into

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Jun 11, 2026
 Merged


Port bootstrap build on OpenBSD
#129080
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a0f6b36

Port bootstrap build on OpenBSD


am11 Jun 8, 2026
b430572

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
38c5dc1

Address CR feedback


am11 Jun 8, 2026
60e6f5f

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
e92d711

Address CR feedback


am11 Jun 9, 2026
3b78cd0

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 9, 2026

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23 changes: 22 additions & 1 deletion
eng/native/configurecompiler.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag(-Wl,--build-id=sha1)
 add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
 # OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
 # emulated TLS (don't pass -fno-emulated-tls).
 # The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
 add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
 add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
 if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
 add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 endif()
 if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
 add_link_options("LINKER:-lc++abi")
 endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
 if (NOT DEFINED CLR_ARM_FPU_TYPE)
 set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down

8 changes: 7 additions & 1 deletion
eng/native/functions.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
 find_library(UNWIND NAMES unwind)

 if(UNWIND STREQUAL UNWIND-NOTFOUND)
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 if(CLR_CMAKE_TARGET_OPENBSD)
 # On OpenBSD the libunwind symbols are provided by the C++ ABI library
 # (libc++abi), so a standalone libunwind is not expected.
 set(UNWIND "")
 else()
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 endif()
 endif()

 set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/gc/unix/gcenv.unix.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
 rlimit addressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
 return addressSpaceLimit.rlim_cur;
 }
#endif // RLIMIT_AS

 // No virtual memory limit
 return GetVirtualMemoryMaxAddress();
Expand Down

10 changes: 10 additions & 0 deletions
src/coreclr/hosts/corerun/corerun.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.h

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Original file line numberDiff line numberDiff line change
@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.inl

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Original file line numberDiff line numberDiff line change
Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
 CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
 // SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_


9 changes: 5 additions & 4 deletions
src/coreclr/inc/clrtypes.h

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
 return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
 return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
 return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/inc/pedecoder.h

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Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/compiler.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
 return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
 return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/jit.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
 return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
 return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down

4 changes: 3 additions & 1 deletion
src/coreclr/minipal/Unix/doublemapping.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 // Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
 // When such a limit is set, GC reserves 1/2 of it, so we need to leave something
 // for the rest of the process.
#ifdef RLIMIT_AS
 // OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
 struct rlimit virtualAddressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
 }
 }
#endif // RLIMIT_AS

 // Clip the maximum double mapped memory size to the file size limit
 struct rlimit fileSizeLimit;
Expand Down

10 changes: 8 additions & 2 deletions
src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <CppLibCreator>ar</CppLibCreator>
 <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

 <SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

 <ItemGroup>
 <NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
 <NativeSystemLibrary Include="dl" />
 <NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
 <NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
 <NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
 <NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
 <!-- binskim warning BA3011 The BIND_NOW flag is missing -->
 <LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
 <LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
 <!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
 indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
 Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
 <LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
 <!-- this workaround can be deleted once the minimum supported glibc version
 (runtime's official build machine's glibc version) is at least 2.33
 see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down

6 changes: 6 additions & 0 deletions
src/coreclr/nativeaot/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
 set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
 # OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
 # __tls_get_addr, so the runtime must use emulated TLS (like Android).
 add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
 set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down

5 changes: 4 additions & 1 deletion
src/coreclr/nativeaot/Runtime/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
 endif()
else()
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
 # OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
 # so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
 # Keep the cookie in writable memory there, like Apple.
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
 add_definitions(-DFEATURE_READONLY_GS_COOKIE)
 endif()
 include(unix/configure.cmake)
Expand Down
Loading
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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 Merged

janvorli
merged 6 commits into

from

Jun 11, 2026
 Merged


Port bootstrap build on OpenBSD
#129080
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a0f6b36

Port bootstrap build on OpenBSD


am11 Jun 8, 2026
b430572

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
38c5dc1

Address CR feedback


am11 Jun 8, 2026
60e6f5f

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
e92d711

Address CR feedback


am11 Jun 9, 2026
3b78cd0

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 9, 2026

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23 changes: 22 additions & 1 deletion
eng/native/configurecompiler.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag(-Wl,--build-id=sha1)
 add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
 # OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
 # emulated TLS (don't pass -fno-emulated-tls).
 # The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
 add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
 add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
 if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
 add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 endif()
 if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
 add_link_options("LINKER:-lc++abi")
 endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
 if (NOT DEFINED CLR_ARM_FPU_TYPE)
 set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down

8 changes: 7 additions & 1 deletion
eng/native/functions.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
 find_library(UNWIND NAMES unwind)

 if(UNWIND STREQUAL UNWIND-NOTFOUND)
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 if(CLR_CMAKE_TARGET_OPENBSD)
 # On OpenBSD the libunwind symbols are provided by the C++ ABI library
 # (libc++abi), so a standalone libunwind is not expected.
 set(UNWIND "")
 else()
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 endif()
 endif()

 set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/gc/unix/gcenv.unix.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
 rlimit addressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
 return addressSpaceLimit.rlim_cur;
 }
#endif // RLIMIT_AS

 // No virtual memory limit
 return GetVirtualMemoryMaxAddress();
Expand Down

10 changes: 10 additions & 0 deletions
src/coreclr/hosts/corerun/corerun.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.h

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Original file line numberDiff line numberDiff line change
@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.inl

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Original file line numberDiff line numberDiff line change
Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
 CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
 // SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_


9 changes: 5 additions & 4 deletions
src/coreclr/inc/clrtypes.h

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
 return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
 return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
 return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/inc/pedecoder.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/compiler.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
 return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
 return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/jit.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
 return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
 return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down

4 changes: 3 additions & 1 deletion
src/coreclr/minipal/Unix/doublemapping.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 // Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
 // When such a limit is set, GC reserves 1/2 of it, so we need to leave something
 // for the rest of the process.
#ifdef RLIMIT_AS
 // OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
 struct rlimit virtualAddressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
 }
 }
#endif // RLIMIT_AS

 // Clip the maximum double mapped memory size to the file size limit
 struct rlimit fileSizeLimit;
Expand Down

10 changes: 8 additions & 2 deletions
src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <CppLibCreator>ar</CppLibCreator>
 <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

 <SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

 <ItemGroup>
 <NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
 <NativeSystemLibrary Include="dl" />
 <NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
 <NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
 <NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
 <NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
 <!-- binskim warning BA3011 The BIND_NOW flag is missing -->
 <LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
 <LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
 <!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
 indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
 Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
 <LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
 <!-- this workaround can be deleted once the minimum supported glibc version
 (runtime's official build machine's glibc version) is at least 2.33
 see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down

6 changes: 6 additions & 0 deletions
src/coreclr/nativeaot/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
 set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
 # OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
 # __tls_get_addr, so the runtime must use emulated TLS (like Android).
 add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
 set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down

5 changes: 4 additions & 1 deletion
src/coreclr/nativeaot/Runtime/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
 endif()
else()
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
 # OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
 # so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
 # Keep the cookie in writable memory there, like Apple.
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
 add_definitions(-DFEATURE_READONLY_GS_COOKIE)
 endif()
 include(unix/configure.cmake)
Expand Down
Loading
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Merged

janvorli
merged 6 commits into

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Jun 11, 2026
 Merged


Port bootstrap build on OpenBSD
#129080
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a0f6b36

Port bootstrap build on OpenBSD


am11 Jun 8, 2026
b430572

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
38c5dc1

Address CR feedback


am11 Jun 8, 2026
60e6f5f

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
e92d711

Address CR feedback


am11 Jun 9, 2026
3b78cd0

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 9, 2026

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23 changes: 22 additions & 1 deletion
eng/native/configurecompiler.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag(-Wl,--build-id=sha1)
 add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
 # OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
 # emulated TLS (don't pass -fno-emulated-tls).
 # The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
 add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
 add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
 if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
 add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 endif()
 if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
 add_link_options("LINKER:-lc++abi")
 endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
 if (NOT DEFINED CLR_ARM_FPU_TYPE)
 set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down

8 changes: 7 additions & 1 deletion
eng/native/functions.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
 find_library(UNWIND NAMES unwind)

 if(UNWIND STREQUAL UNWIND-NOTFOUND)
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 if(CLR_CMAKE_TARGET_OPENBSD)
 # On OpenBSD the libunwind symbols are provided by the C++ ABI library
 # (libc++abi), so a standalone libunwind is not expected.
 set(UNWIND "")
 else()
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 endif()
 endif()

 set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/gc/unix/gcenv.unix.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
 rlimit addressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
 return addressSpaceLimit.rlim_cur;
 }
#endif // RLIMIT_AS

 // No virtual memory limit
 return GetVirtualMemoryMaxAddress();
Expand Down

10 changes: 10 additions & 0 deletions
src/coreclr/hosts/corerun/corerun.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.h

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Original file line numberDiff line numberDiff line change
@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.inl

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Original file line numberDiff line numberDiff line change
Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
 CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
 // SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_


9 changes: 5 additions & 4 deletions
src/coreclr/inc/clrtypes.h

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
 return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
 return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
 return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/inc/pedecoder.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/compiler.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
 return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
 return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/jit.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
 return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
 return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down

4 changes: 3 additions & 1 deletion
src/coreclr/minipal/Unix/doublemapping.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 // Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
 // When such a limit is set, GC reserves 1/2 of it, so we need to leave something
 // for the rest of the process.
#ifdef RLIMIT_AS
 // OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
 struct rlimit virtualAddressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
 }
 }
#endif // RLIMIT_AS

 // Clip the maximum double mapped memory size to the file size limit
 struct rlimit fileSizeLimit;
Expand Down

10 changes: 8 additions & 2 deletions
src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <CppLibCreator>ar</CppLibCreator>
 <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

 <SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

 <ItemGroup>
 <NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
 <NativeSystemLibrary Include="dl" />
 <NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
 <NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
 <NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
 <NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
 <!-- binskim warning BA3011 The BIND_NOW flag is missing -->
 <LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
 <LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
 <!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
 indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
 Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
 <LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
 <!-- this workaround can be deleted once the minimum supported glibc version
 (runtime's official build machine's glibc version) is at least 2.33
 see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down

6 changes: 6 additions & 0 deletions
src/coreclr/nativeaot/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
 set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
 # OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
 # __tls_get_addr, so the runtime must use emulated TLS (like Android).
 add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
 set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down

5 changes: 4 additions & 1 deletion
src/coreclr/nativeaot/Runtime/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
 endif()
else()
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
 # OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
 # so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
 # Keep the cookie in writable memory there, like Apple.
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
 add_definitions(-DFEATURE_READONLY_GS_COOKIE)
 endif()
 include(unix/configure.cmake)
Expand Down
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// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
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}
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var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Merged

janvorli
merged 6 commits into

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Jun 11, 2026
 Merged


Port bootstrap build on OpenBSD
#129080
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a0f6b36

Port bootstrap build on OpenBSD


am11 Jun 8, 2026
b430572

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
38c5dc1

Address CR feedback


am11 Jun 8, 2026
60e6f5f

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
e92d711

Address CR feedback


am11 Jun 9, 2026
3b78cd0

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 9, 2026

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23 changes: 22 additions & 1 deletion
eng/native/configurecompiler.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag(-Wl,--build-id=sha1)
 add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
 # OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
 # emulated TLS (don't pass -fno-emulated-tls).
 # The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
 add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
 add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
 if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
 add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 endif()
 if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
 add_link_options("LINKER:-lc++abi")
 endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
 if (NOT DEFINED CLR_ARM_FPU_TYPE)
 set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down

8 changes: 7 additions & 1 deletion
eng/native/functions.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
 find_library(UNWIND NAMES unwind)

 if(UNWIND STREQUAL UNWIND-NOTFOUND)
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 if(CLR_CMAKE_TARGET_OPENBSD)
 # On OpenBSD the libunwind symbols are provided by the C++ ABI library
 # (libc++abi), so a standalone libunwind is not expected.
 set(UNWIND "")
 else()
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 endif()
 endif()

 set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/gc/unix/gcenv.unix.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
 rlimit addressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
 return addressSpaceLimit.rlim_cur;
 }
#endif // RLIMIT_AS

 // No virtual memory limit
 return GetVirtualMemoryMaxAddress();
Expand Down

10 changes: 10 additions & 0 deletions
src/coreclr/hosts/corerun/corerun.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.h

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Original file line numberDiff line numberDiff line change
@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.inl

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Original file line numberDiff line numberDiff line change
Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
 CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
 // SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_


9 changes: 5 additions & 4 deletions
src/coreclr/inc/clrtypes.h

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
 return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
 return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
 return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/inc/pedecoder.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/compiler.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
 return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
 return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/jit.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
 return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
 return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down

4 changes: 3 additions & 1 deletion
src/coreclr/minipal/Unix/doublemapping.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 // Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
 // When such a limit is set, GC reserves 1/2 of it, so we need to leave something
 // for the rest of the process.
#ifdef RLIMIT_AS
 // OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
 struct rlimit virtualAddressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
 }
 }
#endif // RLIMIT_AS

 // Clip the maximum double mapped memory size to the file size limit
 struct rlimit fileSizeLimit;
Expand Down

10 changes: 8 additions & 2 deletions
src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <CppLibCreator>ar</CppLibCreator>
 <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

 <SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

 <ItemGroup>
 <NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
 <NativeSystemLibrary Include="dl" />
 <NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
 <NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
 <NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
 <NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
 <!-- binskim warning BA3011 The BIND_NOW flag is missing -->
 <LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
 <LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
 <!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
 indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
 Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
 <LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
 <!-- this workaround can be deleted once the minimum supported glibc version
 (runtime's official build machine's glibc version) is at least 2.33
 see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down

6 changes: 6 additions & 0 deletions
src/coreclr/nativeaot/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
 set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
 # OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
 # __tls_get_addr, so the runtime must use emulated TLS (like Android).
 add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
 set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down

5 changes: 4 additions & 1 deletion
src/coreclr/nativeaot/Runtime/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
 endif()
else()
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
 # OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
 # so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
 # Keep the cookie in writable memory there, like Apple.
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
 add_definitions(-DFEATURE_READONLY_GS_COOKIE)
 endif()
 include(unix/configure.cmake)
Expand Down
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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 Merged

janvorli
merged 6 commits into

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Jun 11, 2026
 Merged


Port bootstrap build on OpenBSD
#129080
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a0f6b36

Port bootstrap build on OpenBSD


am11 Jun 8, 2026
b430572

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
38c5dc1

Address CR feedback


am11 Jun 8, 2026
60e6f5f

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 8, 2026
e92d711

Address CR feedback


am11 Jun 9, 2026
3b78cd0

Merge branch 'main' into feature/port/openbsd-bootstrap-misc-fixes


am11 Jun 9, 2026

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23 changes: 22 additions & 1 deletion
eng/native/configurecompiler.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -325,9 +325,16 @@ if(CLR_CMAKE_HOST_LINUX)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag(-Wl,--build-id=sha1)
 add_linker_flag(-Wl,-z,relro,-z,now)
elseif(CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_OPENBSD)
elseif(CLR_CMAKE_HOST_FREEBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
elseif(CLR_CMAKE_HOST_OPENBSD)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 add_linker_flag("-Wl,--build-id=sha1")
 # OpenBSD's ld.so can't resolve native TLS relocs in a .so; rely on clang's default
 # emulated TLS (don't pass -fno-emulated-tls).
 # The PAL's hand-written asm lacks endbr64 landing pads, so disable branch-target CFI.
 add_linker_flag("-Wl,-z,nobtcfi")
elseif(CLR_CMAKE_HOST_SUNOS)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM>:-Wa,--noexecstack>)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
Expand DownExpand Up@@ -847,6 +854,20 @@ else(CLR_CMAKE_TARGET_UNIX)
 add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:IGNORE_DEFAULT_TARGET_OS>>>:TARGET_WINDOWS>)
endif(CLR_CMAKE_TARGET_UNIX)

# OpenBSD only exposes its libunwind symbols through the LLVM C++ runtime
# (libc++/libc++abi), so default to those there. An explicit selection via
# CLR_CMAKE_CXX_STANDARD_LIBRARY/CLR_CMAKE_CXX_ABI_LIBRARY (applied by the cross
# toolchain file) still takes precedence.
if(CLR_CMAKE_TARGET_OPENBSD)
 if(NOT CLR_CMAKE_CXX_STANDARD_LIBRARY)
 add_compile_options($<$<COMPILE_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 add_link_options($<$<LINK_LANG_AND_ID:CXX,Clang>:--stdlib=libc++>)
 endif()
 if(NOT CLR_CMAKE_CXX_ABI_LIBRARY)
 add_link_options("LINKER:-lc++abi")
 endif()
endif()

if(CLR_CMAKE_HOST_UNIX_ARM)
 if (NOT DEFINED CLR_ARM_FPU_TYPE)
 set(CLR_ARM_FPU_TYPE vfpv3)
Expand Down

8 changes: 7 additions & 1 deletion
eng/native/functions.cmake

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Original file line numberDiff line numberDiff line change
Expand Up@@ -192,7 +192,13 @@ function(find_unwind_libs UnwindLibs)
 find_library(UNWIND NAMES unwind)

 if(UNWIND STREQUAL UNWIND-NOTFOUND)
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 if(CLR_CMAKE_TARGET_OPENBSD)
 # On OpenBSD the libunwind symbols are provided by the C++ ABI library
 # (libc++abi), so a standalone libunwind is not expected.
 set(UNWIND "")
 else()
 message(FATAL_ERROR "Cannot find libunwind. Try installing libunwind8-dev or libunwind-devel.")
 endif()
 endif()

 set(${UnwindLibs} ${UNWIND_LIBS} ${UNWIND} PARENT_SCOPE)
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/gc/unix/gcenv.unix.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1013,11 +1013,13 @@ static size_t GetCurrentVirtualMemorySize()
// non zero if it has succeeded, GetVirtualMemoryMaxAddress() if not available
size_t GCToOSInterface::GetVirtualMemoryLimit()
{
#ifdef RLIMIT_AS
 rlimit addressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &addressSpaceLimit) == 0) && (addressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
 return addressSpaceLimit.rlim_cur;
 }
#endif // RLIMIT_AS

 // No virtual memory limit
 return GetVirtualMemoryMaxAddress();
Expand Down

10 changes: 10 additions & 0 deletions
src/coreclr/hosts/corerun/corerun.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -384,6 +384,16 @@ class platform_specific_actions final
#include <link.h>
#include <elf.h>
#include <cstring>

// glibc defines the ElfW() macro to select the native-width Elf type, but some
// libcs (e.g. OpenBSD) don't provide it. Fall back to the appropriate fixed-width type.
#ifndef ElfW
#if defined(TARGET_64BIT)
#define ElfW(type) Elf64_##type
#else
#define ElfW(type) Elf32_##type
#endif
#endif // ElfW
#endif

// CMake generated
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.h

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Original file line numberDiff line numberDiff line change
@@ -1,9 +1,8 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ---------------------------------------------------------------------------
// Check.h
//

//
// Assertion checking infrastructure
// ---------------------------------------------------------------------------
Expand DownExpand Up@@ -663,7 +662,7 @@ CHECK CheckAligned(UINT value, UINT alignment);
CHECK CheckAligned(ULONG value, UINT alignment);
#endif
CHECK CheckAligned(UINT64 value, UINT alignment);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckAligned(SIZE_T value, UINT alignment);
#endif
CHECK CheckAligned(const void *address, UINT alignment);
Expand All@@ -673,7 +672,7 @@ CHECK CheckOverflow(UINT value1, UINT value2);
CHECK CheckOverflow(ULONG value1, ULONG value2);
#endif
CHECK CheckOverflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckOverflow(SIZE_T value1, SIZE_T value2);
#endif
#ifndef __wasm__
Expand All@@ -689,15 +688,15 @@ CHECK CheckUnderflow(UINT value1, UINT value2);
CHECK CheckUnderflow(ULONG value1, ULONG value2);
#endif
CHECK CheckUnderflow(UINT64 value1, UINT64 value2);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2);
#endif
CHECK CheckUnderflow(const void *address, UINT offset);
#if defined(_MSC_VER)
CHECK CheckUnderflow(const void *address, ULONG offset);
#endif
CHECK CheckUnderflow(const void *address, UINT64 offset);
#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
CHECK CheckUnderflow(const void *address, SIZE_T offset);
#endif
CHECK CheckUnderflow(const void *address, void *address2);
Expand Down

11 changes: 5 additions & 6 deletions
src/coreclr/inc/check.inl

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Original file line numberDiff line numberDiff line change
Expand Up@@ -156,7 +156,7 @@ inline CHECK CheckAligned(UINT64 value, UINT alignment)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckAligned(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -192,7 +192,7 @@ inline CHECK CheckOverflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 + value2 >= value1);
Expand DownExpand Up@@ -237,7 +237,7 @@ inline CHECK CheckOverflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckOverflow(const void *address, SIZE_T offset)
{
 CHECK((UINT64) address + offset >= (UINT64) address);
Expand DownExpand Up@@ -271,7 +271,7 @@ inline CHECK CheckUnderflow(UINT64 value1, UINT64 value2)
 CHECK_OK;
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(SIZE_T value1, SIZE_T value2)
{
 CHECK(value1 - value2 <= value1);
Expand DownExpand Up@@ -316,7 +316,7 @@ inline CHECK CheckUnderflow(const void *address, UINT64 offset)
 CHECK_OK;
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline CHECK CheckUnderflow(const void *address, SIZE_T offset)
{
 // SIZE_T is 32bit on wasm32
Expand DownExpand Up@@ -371,4 +371,3 @@ inline CHECK CheckBounds(const void *rangeBase, UINT32 rangeSize, UINT32 offset,
}

#endif // CHECK_INL_


9 changes: 5 additions & 4 deletions
src/coreclr/inc/clrtypes.h

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// ================================================================================
// Standard primitive types for CLR code
//
Expand DownExpand Up@@ -275,7 +276,7 @@ inline UINT64 AlignUp(UINT64 value, UINT alignment)
 return (value+alignment-1)&~(UINT64)(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline SIZE_T AlignUp(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -316,7 +317,7 @@ inline uintptr_t AlignDown(uintptr_t value, UINT alignment)
}
#endif

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline SIZE_T AlignDown(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand DownExpand Up@@ -345,7 +346,7 @@ inline UINT AlignmentPad(UINT64 value, UINT alignment)
 return (UINT) (AlignUp(value, alignment) - value);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentPad(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_WRAPPER;
Expand DownExpand Up@@ -378,7 +379,7 @@ inline UINT AlignmentTrim(UINT64 value, UINT alignment)
 return ((UINT)value)&(alignment-1);
}

#if defined(__APPLE__) || defined(__wasm__)
#if defined(__APPLE__) || defined(__wasm__) || defined(__OpenBSD__)
inline UINT AlignmentTrim(SIZE_T value, UINT alignment)
{
 STATIC_CONTRACT_LEAF;
Expand Down

2 changes: 2 additions & 0 deletions
src/coreclr/inc/pedecoder.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -102,6 +102,8 @@ inline CHECK CheckOverflow(RVA value1, COUNT_T value2)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x4644
#elif defined(__FreeBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC4
#elif defined(__OpenBSD__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0xADC5
#elif defined(__linux__)
#define IMAGE_FILE_MACHINE_NATIVE_OS_OVERRIDE 0x7B79
#elif defined(__NetBSD__)
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/compiler.hpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -141,12 +141,12 @@ inline unsigned genLog2(uint64_t value)
 return BitOperations::BitScanForward(value);
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline unsigned genLog2(size_t value)
{
 return genLog2((uint64_t)value);
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__

// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
//
Expand Down

4 changes: 2 additions & 2 deletions
src/coreclr/jit/jit.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -731,12 +731,12 @@ inline size_t unsigned_abs(ssize_t x)
 return ((size_t)std::abs((int64_t)x));
}

#ifdef __APPLE__
#if defined(__APPLE__) || defined(__OpenBSD__)
inline size_t unsigned_abs(int64_t x)
{
 return ((size_t)std::abs(x));
}
#endif // __APPLE__
#endif // __APPLE__ || __OpenBSD__
#endif // TARGET_64BIT

/*****************************************************************************/
Expand Down

4 changes: 3 additions & 1 deletion
src/coreclr/minipal/Unix/doublemapping.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,5 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//

#include <stddef.h>
#include <sys/mman.h>
Expand DownExpand Up@@ -102,6 +101,8 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 // Clip the maximum double mapped memory size to 1/4 of the virtual address space limit.
 // When such a limit is set, GC reserves 1/2 of it, so we need to leave something
 // for the rest of the process.
#ifdef RLIMIT_AS
 // OpenBSD has no address-space rlimit (RLIMIT_AS), so this clipping is skipped there.
 struct rlimit virtualAddressSpaceLimit;
 if ((getrlimit(RLIMIT_AS, &virtualAddressSpaceLimit) == 0) && (virtualAddressSpaceLimit.rlim_cur != RLIM_INFINITY))
 {
Expand All@@ -111,6 +112,7 @@ bool VMToOSInterface::CreateDoubleMemoryMapper(void** pHandle, size_t *pMaxExecu
 maxDoubleMappedMemorySize = virtualAddressSpaceLimit.rlim_cur;
 }
 }
#endif // RLIMIT_AS

 // Clip the maximum double mapped memory size to the file size limit
 struct rlimit fileSizeLimit;
Expand Down

10 changes: 8 additions & 2 deletions
src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <CppLibCreator>ar</CppLibCreator>
 <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'openbsd'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
 <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
Expand DownExpand Up@@ -65,6 +66,7 @@ The .NET Foundation licenses this file to you under the MIT license.
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' != '0'">$(CrossCompileArch)-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and '$(_IsAlpineExitCode)' == '0'">$(CrossCompileArch)-alpine-linux-$(CrossCompileAbi)</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('freebsd')))">$(CrossCompileArch)-unknown-freebsd12</TargetTriple>
 <TargetTriple Condition="'$(CrossCompileArch)' != '' and ($(CrossCompileRid.StartsWith('openbsd')))">$(CrossCompileArch)-unknown-openbsd</TargetTriple>

 <SharedLibraryInstallName Condition="'$(SharedLibraryInstallName)' == '' and '$(_IsApplePlatform)' == 'true' and '$(NativeLib)' == 'Shared'">@rpath/$(NativeBinaryPrefix)$(TargetName)$(NativeBinaryExt)</SharedLibraryInstallName>

Expand DownExpand Up@@ -222,14 +224,14 @@ The .NET Foundation licenses this file to you under the MIT license.

 <ItemGroup>
 <NativeSystemLibrary Include="stdc++" Condition="'$(LinkStandardCPlusPlusLibrary)' == 'true'" />
 <NativeSystemLibrary Include="dl" />
 <NativeSystemLibrary Include="dl" Condition="'$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="objc" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftCore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="swiftFoundation" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="z" Condition="'$(UseSystemZlib)' == 'true'" />
 <NativeSystemLibrary Include="brotlienc;brotlidec;brotlicommon" Condition="'$(UseSystemBrotli)' == 'true'" />
 <NativeSystemLibrary Include="zstd" Condition="'$(UseSystemZstd)' == 'true'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic'" />
 <NativeSystemLibrary Include="rt" Condition="'$(_IsApplePlatform)' != 'true' and '$(_linuxLibcFlavor)' != 'bionic' and '$(_targetOS)' != 'openbsd'" />
 <NativeSystemLibrary Include="log" Condition="'$(_linuxLibcFlavor)' == 'bionic'" />
 <NativeSystemLibrary Include="icucore" Condition="'$(_IsApplePlatform)' == 'true'" />
 <NativeSystemLibrary Include="m" />
Expand DownExpand Up@@ -267,6 +269,10 @@ The .NET Foundation licenses this file to you under the MIT license.
 <!-- binskim warning BA3011 The BIND_NOW flag is missing -->
 <LinkerArg Include="-Wl,-z,now" Condition="'$(_IsApplePlatform)' != 'true'" Shim="true" />
 <LinkerArg Include="-Wl,-z,stack-size=$(IlcDefaultStackSize)" Condition="'$(IlcDefaultStackSize)' != ''" Shim="true" />
 <!-- OpenBSD enforces IBT/BTCFI on amd64. NativeAOT codegen is not endbr64-instrumented, so
 indirect branches (e.g. switch jump tables) to non-endbr64 targets fault with SIGILL.
 Opt out of branch-target CFI enforcement via the PT_OPENBSD_NOBTCFI program header. -->
 <LinkerArg Include="-Wl,-z,nobtcfi" Condition="'$(_targetOS)' == 'openbsd'" />
 <!-- this workaround can be deleted once the minimum supported glibc version
 (runtime's official build machine's glibc version) is at least 2.33
 see https://github.com/bminor/glibc/commit/99468ed45f5a58f584bab60364af937eb6f8afda -->
Expand Down

6 changes: 6 additions & 0 deletions
src/coreclr/nativeaot/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -28,6 +28,12 @@ if(CLR_CMAKE_TARGET_ANDROID)
 set(FEATURE_JAVAMARSHAL 1)
endif()

if(CLR_CMAKE_TARGET_OPENBSD)
 # OpenBSD's ld.so cannot resolve native TLS relocations in shared objects and has no
 # __tls_get_addr, so the runtime must use emulated TLS (like Android).
 add_definitions(-DFEATURE_EMULATED_TLS)
endif()

if(NOT DEFINED FEATURE_JAVAMARSHAL)
 set(FEATURE_JAVAMARSHAL $<IF:$<CONFIG:Debug,Checked>,1,0>)
endif()
Expand Down

5 changes: 4 additions & 1 deletion
src/coreclr/nativeaot/Runtime/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
Expand Up@@ -288,7 +288,10 @@ if(CLR_CMAKE_TARGET_WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:ASM_MASM>:/safeseh>)
 endif()
else()
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
 # OpenBSD marks the main executable's read-only segments immutable (mimmutable) at load,
 # so the runtime cannot mprotect the read-only GS cookie page to writable to initialize it.
 # Keep the cookie in writable memory there, like Apple.
 if(NOT CLR_CMAKE_TARGET_APPLE AND NOT CLR_CMAKE_TARGET_ARCH_WASM AND NOT CLR_CMAKE_TARGET_OPENBSD)
 add_definitions(-DFEATURE_READONLY_GS_COOKIE)
 endif()
 include(unix/configure.cmake)
Expand Down
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