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.text
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.text
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.global context_save
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.global context_save
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.global context_restore
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.global context_restore
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#include <libarch/context_offset.h>
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#include <kernel/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 context_t 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:
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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 %rsp, OFFSET_SP(%rdi)
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	CONTEXT_SAVE_ARCH_CORE %rdi %rdx
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	movq %rbx, OFFSET_RBX(%rdi)
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	movq %rbp, OFFSET_RBP(%rdi)
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	movq %r12, OFFSET_R12(%rdi)
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	movq %r13, OFFSET_R13(%rdi)
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	movq %r14, OFFSET_R14(%rdi)
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	movq %r15, OFFSET_R15(%rdi)
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	# Save TLS
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	# Save TLS
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	movq %fs:0, %rax
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	movq %fs:0, %rax
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	movq %rax, OFFSET_TLS(%rdi)
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	movq %rax, OFFSET_TLS(%rdi)
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	xorq %rax,%rax		# context_save returns 1
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	xorq %rax,%rax		# context_save returns 1
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#
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#
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# Restore CPU context from context_t 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:
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	movq OFFSET_R15(%rdi), %r15
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	movq OFFSET_R14(%rdi), %r14
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	movq OFFSET_R13(%rdi), %r13
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	movq OFFSET_R12(%rdi), %r12
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	movq OFFSET_RBP(%rdi), %rbp
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	movq OFFSET_RBX(%rdi), %rbx
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	movq OFFSET_SP(%rdi), %rsp   # ctx->sp -> %rsp
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	CONTEXT_RESTORE_ARCH_CORE %rdi %rdx
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	movq OFFSET_PC(%rdi), %rdx
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	movq %rdx,(%rsp)
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	movq %rdx,(%rsp)
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	# Set thread local storage
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	# Set thread local storage
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	movq OFFSET_TLS(%rdi), %rdi   # Set arg1 to TLS addr
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	movq OFFSET_TLS(%rdi), %rdi   # Set arg1 to TLS addr
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	movq $1, %rax		# SYS_TLS_SET
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	movq $1, %rax		# SYS_TLS_SET