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Rev 2479 Rev 2482
Line 37... Line 37...
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# Save CPU context to the context_t variable
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# Save CPU context to the 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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	movl 0(%esp),%eax	# the caller's return %eip
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	movl 0(%esp),%eax	# the caller's return %eip
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	movl 4(%esp),%edx	# address of the kernel_context variable to save context to
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	movl 4(%esp),%edx	# address of the context variable to save context to
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	movl %esp,0(%edx)	# %esp -> ctx->sp
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	movl %esp,0(%edx)	# %esp -> ctx->sp
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	movl %eax,4(%edx)	# %eip -> ctx->pc
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	movl %eax,4(%edx)	# %eip -> ctx->pc
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	movl %ebx,8(%edx)	# %ebx -> ctx->ebx
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	movl %ebx,8(%edx)	# %ebx -> ctx->ebx
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	movl %esi,12(%edx)	# %esi -> ctx->esi
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	movl %esi,12(%edx)	# %esi -> ctx->esi
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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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	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 context variable to restore context from
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	movl 0(%eax),%esp	# ctx->sp -> %esp
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	movl 0(%eax),%esp	# ctx->sp -> %esp
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	movl 4(%eax),%edx	# ctx->pc -> %edx
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	movl 4(%eax),%edx	# ctx->pc -> %edx
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	movl 8(%eax),%ebx	# ctx->ebx -> %ebx
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	movl 8(%eax),%ebx	# ctx->ebx -> %ebx
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	movl 12(%eax),%esi	# ctx->esi -> %esi
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	movl 12(%eax),%esi	# ctx->esi -> %esi
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	movl 16(%eax),%edi	# ctx->edi -> %edi
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	movl 16(%eax),%edi	# ctx->edi -> %edi