| 35,8 → 35,12 |
|---|
| .global fpu_lazy_context_save |
| .global fpu_lazy_context_restore |
| |
| |
| ## Save current CPU context |
| # |
| # save context of this CPU |
| # Save CPU context to the kernel_context variable |
| # pointed by the 1st argument. Returns 1 in EAX. |
| # |
| context_save: |
| push %ebx |
| |
| 58,9 → 62,13 |
|---|
| xorl %eax,%eax # context_save returns 1 |
| incl %eax |
| ret |
| |
| |
| |
| ## Restore current CPU context |
| # |
| # restore saved context on this CPU |
| # Restore CPU context from the kernel_context variable |
| # pointed by the 1st argument. Returns 0 in EAX. |
| # |
| context_restore: |
| movl 4(%esp),%eax # address of the kernel_context variable to restore context from |
| movl (%eax),%esp # ctx->sp -> %esp |
| 77,5 → 85,3 |
|---|
| movl %eax,(%esp) # ctx->pc -> saver's return %eip |
| xorl %eax,%eax # context_restore returns 0 |
| ret |
| |
| |