提交 3a17f757 编写于 作者: R Rich Felker

modernize coding style in sjlj asm

上级 86339bc4
......@@ -4,19 +4,19 @@
.type longjmp,%function
_longjmp:
longjmp:
movl 4(%esp),%edx
movl 8(%esp),%eax
testl %eax,%eax
jnz .L0
incl %eax
.L0:
movl (%edx),%ebx
movl 4(%edx),%esi
movl 8(%edx),%edi
movl 12(%edx),%ebp
movl 16(%edx),%ecx
movl %ecx,%esp
movl 20(%edx),%ecx
mov 4(%esp),%edx
mov 8(%esp),%eax
test %eax,%eax
jnz 1f
inc %eax
1:
mov (%edx),%ebx
mov 4(%edx),%esi
mov 8(%edx),%edi
mov 12(%edx),%ebp
mov 16(%edx),%ecx
mov %ecx,%esp
mov 20(%edx),%ecx
jmp *%ecx
.size _longjmp,.-_longjmp
.size longjmp,.-longjmp
......@@ -7,16 +7,16 @@
__setjmp:
_setjmp:
setjmp:
movl 4(%esp), %eax
movl %ebx, (%eax)
movl %esi, 4(%eax)
movl %edi, 8(%eax)
movl %ebp, 12(%eax)
leal 4(%esp), %ecx
movl %ecx, 16(%eax)
movl (%esp), %ecx
movl %ecx, 20(%eax)
xorl %eax, %eax
mov 4(%esp), %eax
mov %ebx, (%eax)
mov %esi, 4(%eax)
mov %edi, 8(%eax)
mov %ebp, 12(%eax)
lea 4(%esp), %ecx
mov %ecx, 16(%eax)
mov (%esp), %ecx
mov %ecx, 20(%eax)
xor %eax, %eax
ret
.size __setjmp,.-__setjmp
.size _setjmp,.-_setjmp
......
......@@ -7,18 +7,18 @@ _longjmp:
longjmp:
mov %rsi,%rax /* val will be longjmp return */
test %rax,%rax
jnz .L0
jnz 1f
inc %rax /* if val==0, val=1 per longjmp semantics */
.L0:
movq (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */
movq 8(%rdi),%rbp
movq 16(%rdi),%r12
movq 24(%rdi),%r13
movq 32(%rdi),%r14
movq 40(%rdi),%r15
movq 48(%rdi),%rdx /* this ends up being the stack pointer */
1:
mov (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */
mov 8(%rdi),%rbp
mov 16(%rdi),%r12
mov 24(%rdi),%r13
mov 32(%rdi),%r14
mov 40(%rdi),%r15
mov 48(%rdi),%rdx /* this ends up being the stack pointer */
mov %rdx,%rsp
movq 56(%rdi),%rdx /* this is the instruction pointer */
mov 56(%rdi),%rdx /* this is the instruction pointer */
jmp *%rdx /* goto saved address without altering rsp */
.size _longjmp,.-_longjmp
.size longjmp,.-longjmp
......@@ -14,9 +14,9 @@ setjmp:
mov %r13,24(%rdi)
mov %r14,32(%rdi)
mov %r15,40(%rdi)
leaq 8(%rsp),%rdx /* this is our rsp WITHOUT current ret addr */
lea 8(%rsp),%rdx /* this is our rsp WITHOUT current ret addr */
mov %rdx,48(%rdi)
movq (%rsp),%rdx /* save return addr ptr for new rip */
mov (%rsp),%rdx /* save return addr ptr for new rip */
mov %rdx,56(%rdi)
xor %rax,%rax /* always return 0 */
ret
......
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