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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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.text
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.text
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.global context_save
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.global context_save_arch
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.global context_restore
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.global context_restore_arch
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#include <arch/context_offset.h>
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#include <arch/context_offset.h>
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## Save current CPU context
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## Save current CPU context
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#
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#
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# Save CPU context to the kernel_context variable
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# Save CPU context to context_t variable
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# pointed by the 1st argument. Returns 1 in EAX.
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# pointed by the 1st argument. Returns 1 in EAX.
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#
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#
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context_save:
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context_save_arch:
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	movq (%rsp), %rdx     # the caller's return %eip
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	movq (%rsp), %rdx     # the caller's return %eip
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	# In %edi is passed 1st argument
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	# In %edi is passed 1st argument
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	movq %rdx, OFFSET_PC(%rdi)
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	movq %rdx, OFFSET_PC(%rdi)
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	movq %rsp, OFFSET_SP(%rdi)
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	movq %rsp, OFFSET_SP(%rdi)
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	ret
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	ret
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## Restore current CPU context
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## Restore current CPU context
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#
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#
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# Restore CPU context from the kernel_context variable
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# Restore CPU context from context_t variable
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# pointed by the 1st argument. Returns 0 in EAX.
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# pointed by the 1st argument. Returns 0 in EAX.
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#
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#
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context_restore:
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context_restore_arch:
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	movq OFFSET_R15(%rdi), %r15
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	movq OFFSET_R15(%rdi), %r15
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	movq OFFSET_R14(%rdi), %r14
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	movq OFFSET_R14(%rdi), %r14
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	movq OFFSET_R13(%rdi), %r13
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	movq OFFSET_R13(%rdi), %r13
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	movq OFFSET_R12(%rdi), %r12
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	movq OFFSET_R12(%rdi), %r12
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	movq OFFSET_RBP(%rdi), %rbp
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	movq OFFSET_RBP(%rdi), %rbp