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Use SDL_DISABLE_ALLOCA instead of HAVE_ALLOCA in SDL_stdinc.h

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This commit is contained in:
Anonymous Maarten
2023-10-02 11:00:06 +02:00
committed by Anonymous Maarten
parent 552bee47cb
commit 6127ac0871
20 changed files with 185 additions and 44 deletions
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72
src/stdlib/SDL_mslibc.c
View File

@@ -696,8 +696,80 @@ RETZERO:
/* *INDENT-ON* */
}
void __declspec(naked) _chkstk(void)
{
__asm {
push ecx
mov ecx,esp ; lea ecx,dword ptr [esp]+4
add ecx,4
sub ecx,eax
sbb eax,eax
not eax
and ecx,eax
mov eax,esp
and eax,0xfffff000
L1:
cmp ecx,eax
jb short L2
mov eax,ecx
pop ecx
xchg esp,eax
mov eax,dword ptr [eax]
mov dword ptr [esp],eax
ret
L2:
sub eax,0x1000
test dword ptr [eax],eax
jmp short L1
}
}
void __declspec(naked) _alloca_probe_8(void)
{
/* *INDENT-OFF* */
__asm {
push ecx
mov ecx,esp ; lea ecx,dword ptr [esp]+8
add ecx,8
sub ecx,eax
and ecx,0x7
add eax,ecx
sbb ecx,ecx
or eax,ecx
pop ecx
jmp _chkstk
}
/* *INDENT-ON* */
}
void __declspec(naked) _alloca_probe_16(void)
{
/* *INDENT-OFF* */
__asm {
push ecx
mov ecx,esp ; lea ecx,dword ptr [esp]+8
add ecx,8
sub ecx,eax
and ecx,0xf
add eax,ecx
sbb ecx,ecx
or eax,ecx
pop ecx
jmp _chkstk
}
/* *INDENT-ON* */
}
#endif /* _M_IX86 */
#ifdef _M_ARM64
void __chkstk(void);
void __chkstk() {
}
#endif
#endif /* MSC_VER */
#ifdef __ICL

29
src/stdlib/SDL_mslibc_x64.asm Normal file
View File

@@ -0,0 +1,29 @@
include ksamd64.inc
text SEGMENT EXECUTE
public __chkstk
__chkstk:
sub rsp,010h
mov QWORD PTR [rsp],r10
mov QWORD PTR [rsp+08h],r11
xor r11,r11
lea r10,[rsp+018h]
sub r10,rax
cmovb r10,r11
mov r11,QWORD PTR gs:[TeStackLimit]
cmp r10,r11
jae chkstk_finish
and r10w,0f000h
chkstk_loop:
lea r11,[r11-PAGE_SIZE]
mov BYTE PTR [r11],0h
cmp r10,r11
jne chkstk_loop
chkstk_finish:
mov r10,QWORD PTR [rsp]
mov r11,QWORD PTR [rsp+08h]
add rsp,010h
ret
end