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#

# 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

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# - Redistributions in binary form must reproduce the above copyright

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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

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#

#include <kernel/arch/context_offset.h>

.text

.global setjmp

.global longjmp

.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 

		# save registers to the jmp_buf structure

	CONTEXT_SAVE_ARCH_CORE %edx %eax

	xorl %eax,%eax		# set_jmp returns 0

	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 registers from the jmp_buf structure

	CONTEXT_RESTORE_ARCH_CORE %ecx %edx

	movl %edx,0(%esp)	# put saved pc on stack

	ret