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