提交 3a17f757 编写于 作者: R Rich Felker

modernize coding style in sjlj asm

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