| 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 | #include <libarch/context_offset.h>
|
|---|
| 30 |
|
|---|
| 31 | .text
|
|---|
| 32 | .global setjmp
|
|---|
| 33 | .global longjmp
|
|---|
| 34 |
|
|---|
| 35 | .type setjmp,@function
|
|---|
| 36 | setjmp:
|
|---|
| 37 | movl 0(%esp),%eax # save pc value into eax
|
|---|
| 38 | movl 4(%esp),%edx # address of the jmp_buf structure to save context to
|
|---|
| 39 |
|
|---|
| 40 | # save registers to the jmp_buf structure
|
|---|
| 41 | CONTEXT_SAVE_ARCH_CORE %edx %eax
|
|---|
| 42 |
|
|---|
| 43 | xorl %eax,%eax # set_jmp returns 0
|
|---|
| 44 | ret
|
|---|
| 45 |
|
|---|
| 46 | .type longjmp,@function
|
|---|
| 47 | longjmp:
|
|---|
| 48 | movl 4(%esp), %ecx # put address of jmp_buf into ecx
|
|---|
| 49 | movl 8(%esp), %eax # put return value into eax
|
|---|
| 50 |
|
|---|
| 51 | # restore registers from the jmp_buf structure
|
|---|
| 52 | CONTEXT_RESTORE_ARCH_CORE %ecx %edx
|
|---|
| 53 |
|
|---|
| 54 | movl %edx,0(%esp) # put saved pc on stack
|
|---|
| 55 | ret
|
|---|
