[GLOBAL setjmp]
setjmp:
; get return address
mov edx, [esp]
; get address of jmpbuf structure
mov ecx, [esp+4]
; Store general purpose registers
mov [ecx], ebx
mov [ecx+4], edx
mov [ecx+8], ebp
mov [ecx+12], esp
mov [ecx+16], esi
mov [ecx+20], edi
mov [ecx+24], eax
; return 0
xor eax, eax
ret
[GLOBAL longjmp]
longjmp:
; get address of jmpbuf structure
mov ecx, [esp+4]
; get retun value
mov eax, [esp+8]
; load general purpose registers
; (edx contains the return address)
mov ebx, [ecx]
mov edx, [ecx+4]
mov ebp, [ecx+8]
mov esp, [ecx+12]
mov esi, [ecx+16]
mov edi, [ecx+20]
; make sure return value is nonzero
test eax, eax
jnz _doret
inc eax
_doret:
; store back return address
mov [esp], edx
ret
