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Diffstat (limited to 'src/vm/arm/crthelpers.S')
| -rw-r--r-- | src/vm/arm/crthelpers.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/vm/arm/crthelpers.S b/src/vm/arm/crthelpers.S new file mode 100644 index 0000000000..7ccf03a0ce --- /dev/null +++ b/src/vm/arm/crthelpers.S @@ -0,0 +1,60 @@ +// +// Copyright (c) Microsoft. All rights reserved. +// Licensed under the MIT license. See LICENSE file in the project root for full license information. +// + +// ==++== +// + +// +// ==--== +// *********************************************************************** +// File: crthelpers.S +// +// *********************************************************************** + +#include "unixasmmacros.inc" +#include "asmconstants.h" + +.syntax unified +.thumb + +// JIT_MemSet/JIT_MemCpy +// +// It is IMPORANT that the exception handling code is able to find these guys +// on the stack, but to keep them from being tailcalled by VC++ we need to turn +// off optimization and it ends up being a wasteful implementation. +// +// Hence these assembly helpers. +// +//EXTERN_C void __stdcall JIT_MemSet(void* _dest, int c, size_t count) +LEAF_ENTRY JIT_MemSet, _TEXT + + cmp r2, #0 + it eq + bxeq lr + + ldr r3, [r0] + + b C_PLTFUNC(memset) + +LEAF_END_MARKED JIT_MemSet, _TEXT + + +//EXTERN_C void __stdcall JIT_MemCpy(void* _dest, const void *_src, size_t count) +LEAF_ENTRY JIT_MemCpy, _TEXT +// +// It only requires 4 byte alignment +// and doesn't return a value + + cmp r2, #0 + it eq + bxeq lr + + ldr r3, [r0] + ldr r3, [r1] + + b C_PLTFUNC(memcpy) + +LEAF_END_MARKED JIT_MemCpy, _TEXT + |