| 26,6 → 26,8 |
|---|
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| |
| #include <arch/context_offset.h> |
| |
| .text |
| |
| .global context_save_arch |
| 38,15 → 40,11 |
|---|
| # pointed by the 1st argument. Returns 1 in EAX. |
| # |
| context_save_arch: |
| movl 0(%esp),%eax # the caller's return %eip |
| movl 4(%esp),%edx # address of the context variable to save context to |
| movl 0(%esp),%eax # save pc value into eax |
| movl 4(%esp),%edx # address of the context variable to save context to |
| |
| movl %esp,0(%edx) # %esp -> ctx->sp |
| movl %eax,4(%edx) # %eip -> ctx->pc |
| movl %ebx,8(%edx) # %ebx -> ctx->ebx |
| movl %esi,12(%edx) # %esi -> ctx->esi |
| movl %edi,16(%edx) # %edi -> ctx->edi |
| movl %ebp,20(%edx) # %ebp -> ctx->ebp |
| # save registers to given structure |
| CONTEXT_SAVE_ARCH_CORE %edx %eax |
| |
| xorl %eax,%eax # context_save returns 1 |
| incl %eax |
| 60,13 → 58,10 |
|---|
| # |
| context_restore_arch: |
| movl 4(%esp),%eax # address of the context variable to restore context from |
| movl 0(%eax),%esp # ctx->sp -> %esp |
| movl 4(%eax),%edx # ctx->pc -> %edx |
| movl 8(%eax),%ebx # ctx->ebx -> %ebx |
| movl 12(%eax),%esi # ctx->esi -> %esi |
| movl 16(%eax),%edi # ctx->edi -> %edi |
| movl 20(%eax),%ebp # ctx->ebp -> %ebp |
| |
| movl %edx,0(%esp) # ctx->pc -> saver's return %eip |
| # restore registers from given structure |
| CONTEXT_RESTORE_ARCH_CORE %eax %edx |
| |
| movl %edx,0(%esp) # put saved pc on stack |
| xorl %eax,%eax # context_restore returns 0 |
| ret |