#
# Copyright (c) 2001-2004 Jakub Jermar
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# modification, are permitted provided that the following conditions
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.text

.global context_save_arch
.global context_restore_arch

#include <arch/context_offset.h>

## Save current CPU context
#
# Save CPU context to context_t variable
# pointed by the 1st argument. Returns 1 in EAX.
#
context_save_arch:
	movq (%rsp), %rdx     # the caller's return %eip
	
	# 1st argument passed in %edi
	CONTEXT_SAVE_ARCH_CORE %rdi %rdx
	
	xorq %rax, %rax       # context_save returns 1
	incq %rax
	ret


## Restore current CPU context
#
# Restore CPU context from context_t variable
# pointed by the 1st argument. Returns 0 in EAX.
#
context_restore_arch:
	CONTEXT_RESTORE_ARCH_CORE %rdi %rdx
	
	movq %rdx, (%rsp)
	
	xorq %rax, %rax       # context_restore returns 0
	ret