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Fix stack alignment for non-constructor/destructor calls. 

AMD64 stack is 16 Byte aligned at the start of the function,
so always push rbx.
This commit is contained in:
joerg 2010-11-30 18:37:59 +00:00
parent 074a7d7688
commit cb0b8d7cc6
1 changed files with 5 additions and 6 deletions
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11
lib/csu/arch/x86_64/crtbegin.S
View File

@ -1,4 +1,4 @@
/* $NetBSD: crtbegin.S,v 1.1 2010/08/07 18:01:34 joerg Exp $ */
/* $NetBSD: crtbegin.S,v 1.2 2010/11/30 18:37:59 joerg Exp $ */
/*-
* Copyright (c) 2010 Joerg Sonnenberger <joerg@NetBSD.org>
* All rights reserved.
@ -30,7 +30,7 @@
#include <machine/asm.h>
RCSID("$NetBSD: crtbegin.S,v 1.1 2010/08/07 18:01:34 joerg Exp $")
RCSID("$NetBSD: crtbegin.S,v 1.2 2010/11/30 18:37:59 joerg Exp $")
.section .ctors, "aw", @progbits
.align 8
@ -82,6 +82,7 @@ __do_global_dtors_aux:
je 1f
ret
1:
pushq %rbx
movb $1, __finished(%rip)
@ -93,7 +94,6 @@ __do_global_dtors_aux:
2:
#endif
pushq %rbx
leaq 8+__DTOR_LIST__(%rip), %rbx
3:
movq (%rbx), %rax
@ -103,14 +103,13 @@ __do_global_dtors_aux:
addq $8, %rbx
jmp 3b
4:
popq %rbx
cmpq $0, __deregister_frame_info@GOTPCREL(%rip)
je 5f
leaq __EH_FRAME_LIST__(%rip), %rdi
call __deregister_frame_info@PLT
5:
popq %rbx
ret
@ -119,6 +118,7 @@ __do_global_ctors_aux:
je 1f
ret
1:
pushq %rbx
movb $1, __initialized(%rip)
cmpq $0, __register_frame_info@GOTPCREL(%rip)
@ -136,7 +136,6 @@ __do_global_ctors_aux:
call _Jv_RegisterClasses@PLT
3:
pushq %rbx
leaq -8+__CTOR_LIST_END__(%rip), %rbx
4:
movq (%rbx), %rax