26,6 → 26,8 |
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
# |
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#include <kernel/arch/context_offset.h> |
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.text |
.global setjmp |
.global longjmp |
32,18 → 34,13 |
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.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 |
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# 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 |
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movl %ecx, 20(%eax) # save pc |
xorl %eax,%eax # set_jmp returns 0 |
ret |
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.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 |
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# restore all registers |
movl 0(%ecx), %ebx |
movl 4(%ecx), %esi |
movl 8(%ecx), %edi |
movl 12(%ecx), %ebp |
movl 16(%ecx), %esp |
# restore registers from jmp_buf |
CONTEXT_RESTORE_ARCH_CORE %ecx %edx |
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movl 20(%ecx), %edx # saved return address |
jmp *%edx |
movl %edx,0(%esp) # put saved pc on stack |
ret |
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