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.global fpu_context_save
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.global fpu_context_save
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.global fpu_context_restore
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.global fpu_context_restore
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.global fpu_lazy_context_save
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.global fpu_lazy_context_save
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.global fpu_lazy_context_restore
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.global fpu_lazy_context_restore
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## Save current CPU context
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#
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# Save CPU context to the kernel_context variable
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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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# save context of this CPU
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context_save:
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context_save:
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	push %ebx
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	push %ebx
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	movl 4(%esp),%eax	# the caller's return %eip
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	movl 4(%esp),%eax	# the caller's return %eip
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	movl 8(%esp),%ebx	# address of the kernel_context variable to save context to
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	movl 8(%esp),%ebx	# address of the kernel_context variable to save context to
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	movl %ebp,28(%eax)
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	movl %ebp,28(%eax)
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	xorl %eax,%eax		# context_save returns 1
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	xorl %eax,%eax		# context_save returns 1
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	incl %eax
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	incl %eax
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	ret
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	ret
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## Restore current CPU context
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#
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#
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# restore saved context on this CPU
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# Restore CPU context from the kernel_context variable
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# pointed by the 1st argument. Returns 0 in EAX.
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#
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context_restore:
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context_restore:
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	movl 4(%esp),%eax	# address of the kernel_context variable to restore context from
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	movl 4(%esp),%eax	# address of the kernel_context variable to restore context from
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	movl (%eax),%esp	# ctx->sp -> %esp
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	movl (%eax),%esp	# ctx->sp -> %esp
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	addl $4,%esp		# this is for the pop we don't do
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	addl $4,%esp		# this is for the pop we don't do
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	movl 4(%eax),%eax
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	movl 4(%eax),%eax
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	movl %eax,(%esp)	# ctx->pc -> saver's return %eip
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	movl %eax,(%esp)	# ctx->pc -> saver's return %eip
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        xorl %eax,%eax		# context_restore returns 0
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        xorl %eax,%eax		# context_restore returns 0
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	ret
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	ret
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