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It's bad form to access data *below* the stack pointer.

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rsc 2004-05-09 16:10:31 +00:00
parent 2e965b3324
commit 2f05c0e86d
1 changed files with 19 additions and 16 deletions
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35
src/libsec/386/sha1block.spp
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@ -75,9 +75,10 @@ _sha1block:
* stack offsets
* void sha1block(uchar *DATA, int LEN, ulong *STATE)
*/
#define DATA 8
#define LEN 12
#define STATE 16
#define STACKSIZE (48+80*4)
#define DATA (STACKSIZE+8)
#define LEN (STACKSIZE+12)
#define STATE (STACKSIZE+16)
/*
* stack offsets for locals
@ -89,20 +90,22 @@ _sha1block:
* ulong a = eax, b = ebx, c = ecx, d = edx, e = esi
* ulong tmp = edi
*/
#define WARRAY (-4-(80*4))
#define TMP1 (-8-(80*4))
#define TMP2 (-12-(80*4))
#define W15 (-16-(80*4))
#define W40 (-20-(80*4))
#define W60 (-24-(80*4))
#define W80 (-28-(80*4))
#define EDATA (-32-(80*4))
#define OLDEBX (-36-(80*4))
#define OLDESI (-40-(80*4))
#define OLDEDI (-44-(80*4))
#define WARRAY (STACKSIZE-4-(80*4))
#define TMP1 (STACKSIZE-8-(80*4))
#define TMP2 (STACKSIZE-12-(80*4))
#define W15 (STACKSIZE-16-(80*4))
#define W40 (STACKSIZE-20-(80*4))
#define W60 (STACKSIZE-24-(80*4))
#define W80 (STACKSIZE-28-(80*4))
#define EDATA (STACKSIZE-32-(80*4))
#define OLDEBX (STACKSIZE-36-(80*4))
#define OLDESI (STACKSIZE-40-(80*4))
#define OLDEDI (STACKSIZE-44-(80*4))
/* Prelude */
pushl %ebp
subl $(STACKSIZE), %esp
mov %ebx, OLDEBX(%esp)
mov %esi, OLDESI(%esp)
mov %edi, OLDEDI(%esp)
@ -209,6 +212,6 @@ loop4:
mov OLDEBX(%esp), %ebx
mov OLDESI(%esp), %esi
mov OLDEDI(%esp), %edi
movl %esp, %ebp
leave
addl $(STACKSIZE), %esp
popl %ebp
ret