| 28,16 → 28,16 |
|---|
| |
| .text |
| |
| .global context_save |
| .global context_restore |
| .global context_save_arch |
| .global context_restore_arch |
| |
| |
| ## Save current CPU context |
| # |
| # Save CPU context to the kernel_context variable |
| # Save CPU context to the context_t variable |
| # pointed by the 1st argument. Returns 1 in EAX. |
| # |
| context_save: |
| context_save_arch: |
| movl 0(%esp),%eax # the caller's return %eip |
| movl 4(%esp),%edx # address of the kernel_context variable to save context to |
| |
| 53,12 → 53,12 |
|---|
| ret |
| |
| |
| ## Restore current CPU context |
| ## Restore saved CPU context |
| # |
| # Restore CPU context from the kernel_context variable |
| # Restore CPU context from context_t variable |
| # pointed by the 1st argument. Returns 0 in EAX. |
| # |
| context_restore: |
| context_restore_arch: |
| movl 4(%esp),%eax # address of the kernel_context variable to restore context from |
| movl 0(%eax),%esp # ctx->sp -> %esp |
| movl 4(%eax),%edx # ctx->pc -> %edx |