summaryrefslogtreecommitdiff
path: root/lib/alloca86-bt.S
blob: 994da204263359b43c12a0f8638afd991855364c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/* ---------------------------------------------- */
/* alloca86b.S */

#include "../config.h"

.globl __bound_alloca

__bound_alloca:
    pop     %edx
    pop     %eax
    mov     %eax, %ecx
    add     $3,%eax
    and     $-4,%eax
    jz      p6

#ifdef TCC_TARGET_PE
p4:
    cmp     $4096,%eax
    jle     p5
    sub     $4096,%esp
    sub     $4096,%eax
    test    %eax,(%esp)
    jmp p4

p5:
#endif

    sub     %eax,%esp
    mov     %esp,%eax

    push    %edx
    push    %eax
    push    %ecx
    push    %eax
    call   __bound_new_region
    add    $8, %esp
    pop     %eax
    pop     %edx

p6:
    push    %edx
    push    %edx
    ret

/* ---------------------------------------------- */