| 0,0 → 1,63 |
|---|
| # |
| # Copyright (c) 2008 Josef Cejka |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # - Redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution. |
| # - The name of the author may not be used to endorse or promote products |
| # derived from this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| |
| .text |
| .global setjmp |
| .global longjmp |
| |
| .type setjmp,@function |
| setjmp: |
| movl 0(%esp), %ecx # save current pc |
| leal 4(%esp), %edx # save stack pointer |
| movl (%edx), %eax # get jmp_buf pointer |
| |
| # Save registers |
| movl %ebx, 0(%eax) |
| movl %esi, 4(%eax) |
| movl %edi, 8(%eax) |
| movl %ebp, 12(%eax) |
| movl %edx, 16(%eax) |
| |
| movl %ecx, 20(%eax) # save pc |
| ret |
| |
| .type longjmp,@function |
| longjmp: |
| |
| movl 4(%esp), %ecx # put address of jmp_buf into ecx |
| movl 8(%esp), %eax # put return value into eax |
| |
| # restore all registers |
| movl 0(%ecx), %ebx |
| movl 4(%ecx), %esi |
| movl 8(%ecx), %edi |
| movl 12(%ecx), %ebp |
| movl 16(%ecx), %esp |
| |
| movl 20(%ecx), %edx # saved return address |
| jmp *%edx |