| 26,6 → 26,8 |
|---|
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| |
| #include <kernel/arch/context_offset.h> |
| |
| .text |
| .global setjmp |
| .global longjmp |
| 32,18 → 34,13 |
|---|
| |
| .type setjmp,@function |
| setjmp: |
| movl 0(%esp), %ecx # save current pc |
| leal 4(%esp), %edx # save stack pointer |
| movl (%edx), %eax # get jmp_buf pointer |
| movl 0(%esp),%eax # save pc value into eax |
| movl 4(%esp),%edx # address of the context variable to save context to |
| |
| # Save registers |
| movl %ebx, 0(%eax) |
| movl %esi, 4(%eax) |
| movl %edi, 8(%eax) |
| movl %ebp, 12(%eax) |
| movl %edx, 16(%eax) |
| # save registers to given structure |
| CONTEXT_SAVE_ARCH_CORE %edx %eax |
| |
| movl %ecx, 20(%eax) # save pc |
| xorl %eax,%eax # set_jmp returns 0 |
| ret |
| |
| .type longjmp,@function |
| 52,12 → 49,9 |
|---|
| movl 4(%esp), %ecx # put address of jmp_buf into ecx |
| movl 8(%esp), %eax # put return value into eax |
| |
| # restore all registers |
| movl 0(%ecx), %ebx |
| movl 4(%ecx), %esi |
| movl 8(%ecx), %edi |
| movl 12(%ecx), %ebp |
| movl 16(%ecx), %esp |
| |
| movl 20(%ecx), %edx # saved return address |
| jmp *%edx |
| # restore registers from jmp_buf |
| CONTEXT_RESTORE_ARCH_CORE %ecx %edx |
| |
| movl %edx,0(%esp) # put saved pc on stack |
| ret |
| |