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align stack properly for calling global ctors/dtors on x86[_64]

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failure to do so was causing crashes on x86_64 when ctors used SSE,
which was first observed when ctors called variadic functions due to
the SSE prologue code inserted into every variadic function.
This commit is contained in:
Rich Felker 2013-06-03 17:32:42 -04:00
parent 44b4d09fc0
commit a6d272127b
4 changed files with 8 additions and 0 deletions
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2
crt/i386/crti.s
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@ -1,7 +1,9 @@
.section .init .section .init
.global _init .global _init
_init: _init:
sub $12,%esp
.section .fini .section .fini
.global _fini .global _fini
_fini: _fini:
sub $12,%esp

2
crt/i386/crtn.s
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@ -1,5 +1,7 @@
.section .init .section .init
add $12,%esp
ret ret
.section .fini .section .fini
add $12,%esp
ret ret

2
crt/x86_64/crti.s
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@ -1,7 +1,9 @@
.section .init .section .init
.global _init .global _init
_init: _init:
push %rax
.section .fini .section .fini
.global _fini .global _fini
_fini: _fini:
push %rax

2
crt/x86_64/crtn.s
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@ -1,5 +1,7 @@
.section .init .section .init
pop %rax
ret ret
.section .fini .section .fini
pop %rax
ret ret