0,0 → 1,57 |
# |
# 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. |
# |
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#include <kernel/arch/context_offset.h> |
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.text |
.global setjmp |
.global longjmp |
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.type setjmp,@function |
setjmp: |
movl 0(%esp),%eax # save pc value into eax |
movl 4(%esp),%edx # address of the jmp_buf structure to save context to |
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# save registers to the jmp_buf structure |
CONTEXT_SAVE_ARCH_CORE %edx %eax |
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xorl %eax,%eax # set_jmp returns 0 |
ret |
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.type longjmp,@function |
longjmp: |
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movl 4(%esp), %ecx # put address of jmp_buf into ecx |
movl 8(%esp), %eax # put return value into eax |
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# restore registers from the jmp_buf structure |
CONTEXT_RESTORE_ARCH_CORE %ecx %edx |
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movl %edx,0(%esp) # put saved pc on stack |
ret |
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