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add ___chkstk_ms compiler-rt function

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This commit is contained in:
Andrew Kelley 2017-09-30 13:39:18 -04:00
parent 09369b6a43
commit 53aa72b58a
1 changed files with 32 additions and 1 deletions
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33
std/special/compiler_rt/index.zig
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@ -98,7 +98,7 @@ export nakedcc fn __aeabi_uidivmod() {
@setGlobalLinkage(__aeabi_uidivmod, builtin.GlobalLinkage.Internal);
}
export nakedcc fn __chkstk() {
export nakedcc fn __chkstk() align 4 {
@setDebugSafety(this, false);
if (comptime builtin.os == builtin.Os.windows) {
@ -132,6 +132,37 @@ export nakedcc fn __chkstk() {
@setGlobalLinkage(__chkstk, builtin.GlobalLinkage.Internal);
}
export nakedcc fn ___chkstk_ms() align 4 {
@setDebugSafety(this, false);
if (comptime builtin.os == builtin.Os.windows) {
if (comptime builtin.arch == builtin.Arch.x86_64) {
asm volatile (
\\ push %%rcx
\\ push %%rax
\\ cmp $0x1000,%%rax
\\ lea 24(%%rsp),%%rcx
\\ jb 1f
\\2:
\\ sub $0x1000,%%rcx
\\ test %%rcx,(%%rcx)
\\ sub $0x1000,%%rax
\\ cmp $0x1000,%%rax
\\ ja 2b
\\1:
\\ sub %%rax,%%rcx
\\ test %%rcx,(%%rcx)
\\ pop %%rax
\\ pop %%rcx
\\ ret
);
unreachable;
}
}
@setGlobalLinkage(__chkstk, builtin.GlobalLinkage.Internal);
}
export fn __udivmodsi4(a: u32, b: u32, rem: &u32) -> u32 {
@setDebugSafety(this, is_test);
@setGlobalLinkage(__udivmodsi4, builtin.GlobalLinkage.LinkOnce);