mirror of
https://github.com/reactos/reactos.git
synced 2024-11-11 01:04:11 +00:00
111 lines
2.5 KiB
ArmAsm
111 lines
2.5 KiB
ArmAsm
/* $Id$
|
|
*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS system libraries
|
|
* PURPOSE: Implementation of _setjmp/longjmp
|
|
* FILE: lib/msvcrt/i386/setjmp.s
|
|
* PROGRAMMER: Ge van Geldorp (ge@gse.nl)
|
|
* NOTES: Implementation is not complete, see Wine source for a more
|
|
* complete implementation
|
|
*/
|
|
|
|
#define JB_BP 0
|
|
#define JB_BX 1
|
|
#define JB_DI 2
|
|
#define JB_SI 3
|
|
#define JB_SP 4
|
|
#define JB_IP 5
|
|
|
|
#define PCOFF 0
|
|
|
|
#define JMPBUF 4
|
|
|
|
/*
|
|
* int
|
|
* _setjmp(jmp_buf env);
|
|
*
|
|
* Parameters:
|
|
* [ESP+04h] - jmp_buf env
|
|
* Registers:
|
|
* None
|
|
* Returns:
|
|
* 0
|
|
* Notes:
|
|
* Sets up the jmp_buf
|
|
*/
|
|
.globl __setjmp
|
|
__setjmp:
|
|
xorl %eax, %eax
|
|
movl JMPBUF(%esp), %edx
|
|
|
|
/* Save registers. */
|
|
movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
|
|
movl %ebx, (JB_BX*4)(%edx)
|
|
movl %edi, (JB_DI*4)(%edx)
|
|
movl %esi, (JB_SI*4)(%edx)
|
|
leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
|
|
movl %ecx, (JB_SP*4)(%edx)
|
|
movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
|
|
movl %ecx, (JB_IP*4)(%edx)
|
|
ret
|
|
|
|
/*
|
|
* int
|
|
* _setjmp3(jmp_buf env, int nb_args, ...);
|
|
*
|
|
* Parameters:
|
|
* [ESP+04h] - jmp_buf env
|
|
* Registers:
|
|
* None
|
|
* Returns:
|
|
* 0
|
|
* Notes:
|
|
* Sets up the jmp_buf
|
|
*/
|
|
.globl __setjmp3
|
|
__setjmp3:
|
|
xorl %eax, %eax
|
|
movl JMPBUF(%esp), %edx
|
|
|
|
/* Save registers. */
|
|
movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
|
|
movl %ebx, (JB_BX*4)(%edx)
|
|
movl %edi, (JB_DI*4)(%edx)
|
|
movl %esi, (JB_SI*4)(%edx)
|
|
leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
|
|
movl %ecx, (JB_SP*4)(%edx)
|
|
movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
|
|
movl %ecx, (JB_IP*4)(%edx)
|
|
ret
|
|
|
|
#define VAL 8
|
|
|
|
/*
|
|
* void
|
|
* longjmp(jmp_buf env, int value);
|
|
*
|
|
* Parameters:
|
|
* [ESP+04h] - jmp_buf setup by _setjmp
|
|
* [ESP+08h] - int value to return
|
|
* Registers:
|
|
* None
|
|
* Returns:
|
|
* Doesn't return
|
|
* Notes:
|
|
* Non-local goto
|
|
*/
|
|
.globl _longjmp
|
|
_longjmp:
|
|
movl JMPBUF(%esp), %ecx /* User's jmp_buf in %ecx. */
|
|
|
|
movl VAL(%esp), %eax /* Second argument is return value. */
|
|
/* Save the return address now. */
|
|
movl (JB_IP*4)(%ecx), %edx
|
|
/* Restore registers. */
|
|
movl (JB_BP*4)(%ecx), %ebp
|
|
movl (JB_BX*4)(%ecx), %ebx
|
|
movl (JB_DI*4)(%ecx), %edi
|
|
movl (JB_SI*4)(%ecx), %esi
|
|
movl (JB_SP*4)(%ecx), %esp
|
|
/* Jump to saved PC. */
|
|
jmp *%edx
|