mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
e75ffde09e
You can now build Cosmopolitan with Clang:
make -j8 MODE=llvm
o/llvm/examples/hello.com
The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.
43 lines
1 KiB
ArmAsm
43 lines
1 KiB
ArmAsm
// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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#include "third_party/compiler_rt/assembly.h"
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// _chkstk routine
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// This routine is windows specific
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// http://msdn.microsoft.com/en-us/library/ms648426.aspx
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// Notes from r227519
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// MSVC x64s __chkstk and cygmings ___chkstk_ms do not adjust %rsp
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// themselves. It also does not clobber %rax so we can reuse it when
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// adjusting %rsp.
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#ifdef __x86_64__
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.section .yoink
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nopl huge_compiler_rt_license(%rip)
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.previous
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.text
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.balign 4
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DEFINE_COMPILERRT_FUNCTION(___chkstk_ms)
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push %rcx
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push %rax
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cmp $0x1000,%rax
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lea 24(%rsp),%rcx
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jb 1f
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2:
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sub $0x1000,%rcx
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test %rcx,(%rcx)
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sub $0x1000,%rax
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cmp $0x1000,%rax
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ja 2b
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1:
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sub %rax,%rcx
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test %rcx,(%rcx)
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pop %rax
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pop %rcx
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ret
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END_COMPILERRT_FUNCTION(___chkstk_ms)
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#endif // __x86_64__
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