diff options
Diffstat (limited to 'setjmp.S')
-rw-r--r-- | setjmp.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/setjmp.S b/setjmp.S new file mode 100644 index 0000000..7b42dc7 --- /dev/null +++ b/setjmp.S @@ -0,0 +1,37 @@ +.globl setjmp +setjmp: + movl 4(%esp), %eax + + movl %ebx, 0(%eax) + movl %ecx, 4(%eax) + movl %edx, 8(%eax) + movl %esi, 12(%eax) + movl %edi, 16(%eax) + movl %esp, 20(%eax) + movl %ebp, 24(%eax) + pushl 0(%esp) /* %eip */ + popl 28(%eax) + + movl $0, %eax /* return value */ + ret + +.globl longjmp +longjmp: + movl 4(%esp), %eax + + movl 0(%eax), %ebx + movl 4(%eax), %ecx + movl 8(%eax), %edx + movl 12(%eax), %esi + movl 16(%eax), %edi + movl 20(%eax), %esp + movl 24(%eax), %ebp + + addl $4, %esp /* pop %eip into thin air */ + pushl 28(%eax) /* push new %eip */ + + movl $1, %eax /* return value (appears to come from setjmp!) */ + ret + + + |