From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 3 Jun 2013 21:32:42 +0000 (-0400)
Subject: align stack properly for calling global ctors/dtors on x86[_64]
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=a6d272127bb6a2eb09dc182cc39c49e77310ade4;hp=44b4d09fc0626541ca12cf96f65adc21ab1fc413

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

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.
---

diff --git a/crt/i386/crti.s b/crt/i386/crti.s
index 2eb23ed5..d2682a20 100644
--- a/crt/i386/crti.s
+++ b/crt/i386/crti.s
@@ -1,7 +1,9 @@
 .section .init
 .global _init
 _init:
+	sub $12,%esp
 
 .section .fini
 .global _fini
 _fini:
+	sub $12,%esp
diff --git a/crt/i386/crtn.s b/crt/i386/crtn.s
index 055451ed..f3b61e01 100644
--- a/crt/i386/crtn.s
+++ b/crt/i386/crtn.s
@@ -1,5 +1,7 @@
 .section .init
+	add $12,%esp
 	ret
 
 .section .fini
+	add $12,%esp
 	ret
diff --git a/crt/x86_64/crti.s b/crt/x86_64/crti.s
index 2eb23ed5..4788968b 100644
--- a/crt/x86_64/crti.s
+++ b/crt/x86_64/crti.s
@@ -1,7 +1,9 @@
 .section .init
 .global _init
 _init:
+	push %rax
 
 .section .fini
 .global _fini
 _fini:
+	push %rax
diff --git a/crt/x86_64/crtn.s b/crt/x86_64/crtn.s
index 055451ed..29198b77 100644
--- a/crt/x86_64/crtn.s
+++ b/crt/x86_64/crtn.s
@@ -1,5 +1,7 @@
 .section .init
+	pop %rax
 	ret
 
 .section .fini
+	pop %rax
 	ret