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reactos/sdk/lib/crt/except/amd64/chkstk_ms.s

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[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
2011-05-14 19:12:09 +00:00
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* PURPOSE: Implementation of _chkstk and _alloca_probe
* PROGRAMMERS Richard Henderson <rth@redhat.com>
* Kai Tietz <kai.tietz@onevision.com>
* Timo Kreuzer (timo.kreuzer@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include <asm.inc>
#define PAGE_SIZE 4096
/* CODE **********************************************************************/
.code64
[CRT] Use chkstk_ms.s on x64 builds
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PUBLIC __chkstk
PUBLIC __alloca_probe
__alloca_probe:
.PROC __chkstk
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
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push rcx /* save temps */
[CRT] Use chkstk_ms.s on x64 builds
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.pushreg rcx
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
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push rax
[CRT] Use chkstk_ms.s on x64 builds
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.pushreg rax
.endprolog
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
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cmp rax, PAGE_SIZE /* > 4k ?*/
lea rcx, [rsp + 24] /* point past return addr */
jb l_LessThanAPage
[CRT] - comment out gcc specific code on MSVC builds - add some files for amd64 to msvcrtex svn path=/trunk/; revision=52478
2011-06-26 22:57:12 +00:00
l_MoreThanAPage:
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
2011-05-14 19:12:09 +00:00
sub rcx, PAGE_SIZE /* yes, move pointer down 4k */
[CRT] - comment out gcc specific code on MSVC builds - add some files for amd64 to msvcrtex svn path=/trunk/; revision=52478
2011-06-26 22:57:12 +00:00
or byte ptr [rcx], 0 /* probe there */
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
2011-05-14 19:12:09 +00:00
sub rax, PAGE_SIZE /* decrement count */
cmp rax, PAGE_SIZE
ja l_MoreThanAPage /* and do it again */
[CRT] - comment out gcc specific code on MSVC builds - add some files for amd64 to msvcrtex svn path=/trunk/; revision=52478
2011-06-26 22:57:12 +00:00
l_LessThanAPage:
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
2011-05-14 19:12:09 +00:00
sub rcx, rax
[CRT] - comment out gcc specific code on MSVC builds - add some files for amd64 to msvcrtex svn path=/trunk/; revision=52478
2011-06-26 22:57:12 +00:00
or byte ptr [rcx], 0 /* less than 4k, just peek here */
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
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pop rax
pop rcx
ret
[CRT] Use chkstk_ms.s on x64 builds
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.ENDP
[CRT] - Implement __chkstk_ms for x86 and amd64 - amd64 code is based on code by Kai Tietz and Richard Henderson - x86 code is based on old __chkstk implementation and code by Kai Tietz and Richard Henderson - Function is required by newer gcc versions svn path=/trunk/; revision=51747
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END
/* EOF */
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