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Diffstat (limited to 'src/vm/amd64/crthelpers.S')
| -rw-r--r-- | src/vm/amd64/crthelpers.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/vm/amd64/crthelpers.S b/src/vm/amd64/crthelpers.S new file mode 100644 index 0000000000..168359e192 --- /dev/null +++ b/src/vm/amd64/crthelpers.S @@ -0,0 +1,41 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. + +.intel_syntax noprefix +#include "unixasmmacros.inc" +#include "asmconstants.h" + +// JIT_MemSet/JIT_MemCpy +// +// It is IMPORANT that the exception handling code is able to find these guys +// on the stack, but on non-windows platforms we can just defer to the platform +// implementation. +// + +LEAF_ENTRY JIT_MemSet, _TEXT + test rdx, rdx + jz Exit_MemSet + + cmp byte ptr [rdi], 0 + + jmp C_PLTFUNC(memset) + +Exit_MemSet: + ret + +LEAF_END_MARKED JIT_MemSet, _TEXT + +LEAF_ENTRY JIT_MemCpy, _TEXT + test rdx, rdx + jz Exit_MemCpy + + cmp byte ptr [rdi], 0 + cmp byte ptr [rsi], 0 + + jmp C_PLTFUNC(memcpy) + +Exit_MemCpy: + ret + +LEAF_END_MARKED JIT_MemCpy, _TEXT |