| [6cbed012] | 1 | #
|
|---|
| 2 | # Copyright (c) 2008 Josef Cejka
|
|---|
| 3 | # All rights reserved.
|
|---|
| 4 | #
|
|---|
| 5 | # Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | # modification, are permitted provided that the following conditions
|
|---|
| 7 | # are met:
|
|---|
| 8 | #
|
|---|
| 9 | # - Redistributions of source code must retain the above copyright
|
|---|
| 10 | # notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | # - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | # notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | # documentation and/or other materials provided with the distribution.
|
|---|
| 14 | # - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | # derived from this software without specific prior written permission.
|
|---|
| 16 | #
|
|---|
| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | #
|
|---|
| 28 |
|
|---|
| 29 | .text
|
|---|
| 30 | .global setjmp
|
|---|
| 31 | .global longjmp
|
|---|
| 32 |
|
|---|
| 33 | .type setjmp,@function
|
|---|
| 34 | setjmp:
|
|---|
| 35 | movl 0(%esp), %ecx # save current pc
|
|---|
| 36 | leal 4(%esp), %edx # save stack pointer
|
|---|
| 37 | movl (%edx), %eax # get jmp_buf pointer
|
|---|
| 38 |
|
|---|
| 39 | # Save registers
|
|---|
| 40 | movl %ebx, 0(%eax)
|
|---|
| 41 | movl %esi, 4(%eax)
|
|---|
| 42 | movl %edi, 8(%eax)
|
|---|
| 43 | movl %ebp, 12(%eax)
|
|---|
| 44 | movl %edx, 16(%eax)
|
|---|
| 45 |
|
|---|
| 46 | movl %ecx, 20(%eax) # save pc
|
|---|
| 47 | ret
|
|---|
| 48 |
|
|---|
| 49 | .type longjmp,@function
|
|---|
| 50 | longjmp:
|
|---|
| 51 |
|
|---|
| 52 | movl 4(%esp), %ecx # put address of jmp_buf into ecx
|
|---|
| 53 | movl 8(%esp), %eax # put return value into eax
|
|---|
| 54 |
|
|---|
| 55 | # restore all registers
|
|---|
| 56 | movl 0(%ecx), %ebx
|
|---|
| 57 | movl 4(%ecx), %esi
|
|---|
| 58 | movl 8(%ecx), %edi
|
|---|
| 59 | movl 12(%ecx), %ebp
|
|---|
| 60 | movl 16(%ecx), %esp
|
|---|
| 61 |
|
|---|
| 62 | movl 20(%ecx), %edx # saved return address
|
|---|
| 63 | jmp *%edx
|
|---|
