Author: kib
Date: Fri Dec 30 18:20:44 2011
New Revision: 229009
URL: http://svn.freebsd.org/changeset/base/229009
Log:
MFC r227024:
Despite official i386 ABI does not mandate any stack alignment besides
the word alignment, some versions of gcc do require 16-byte alignment.
Make sure the stack is 16-byte aligned before calling a subroutine.
Modified:
stable/9/lib/libc/i386/gen/setjmp.S
stable/9/lib/libc/i386/gen/sigsetjmp.S
Directory Properties:
stable/9/lib/libc/ (props changed)
Modified: stable/9/lib/libc/i386/gen/setjmp.S
==============================================================================
--- stable/9/lib/libc/i386/gen/setjmp.S Fri Dec 30 18:18:06 2011
(r229008)
+++ stable/9/lib/libc/i386/gen/setjmp.S Fri Dec 30 18:20:44 2011
(r229009)
@@ -51,12 +51,19 @@ __FBSDID("$FreeBSD$");
ENTRY(setjmp)
movl 4(%esp),%ecx
PIC_PROLOGUE
+#ifdef PIC
+ subl $12,%esp /* make the stack 16-byte aligned */
+#endif
leal 28(%ecx), %eax
pushl %eax /* (sigset_t*)oset */
pushl $0 /* (sigset_t*)set */
pushl $1 /* SIG_BLOCK */
call PIC_PLT(CNAME(_sigprocmask))
+#ifdef PIC
+ addl $24,%esp
+#else
addl $12,%esp
+#endif
PIC_EPILOGUE
movl 4(%esp),%ecx
movl 0(%esp),%edx
@@ -76,12 +83,19 @@ END(setjmp)
ENTRY(__longjmp)
movl 4(%esp),%edx
PIC_PROLOGUE
+#ifdef PIC
+ subl $12,%esp /* make the stack 16-byte aligned */
+#endif
pushl $0 /* (sigset_t*)oset */
leal 28(%edx), %eax
pushl %eax /* (sigset_t*)set */
pushl $3 /* SIG_SETMASK */
call PIC_PLT(CNAME(_sigprocmask))
+#ifdef PIC
+ addl $24,%esp
+#else
addl $12,%esp
+#endif
PIC_EPILOGUE
movl 4(%esp),%edx
movl 8(%esp),%eax
Modified: stable/9/lib/libc/i386/gen/sigsetjmp.S
==============================================================================
--- stable/9/lib/libc/i386/gen/sigsetjmp.S Fri Dec 30 18:18:06 2011
(r229008)
+++ stable/9/lib/libc/i386/gen/sigsetjmp.S Fri Dec 30 18:20:44 2011
(r229009)
@@ -60,12 +60,19 @@ ENTRY(sigsetjmp)
testl %eax,%eax
jz 2f
PIC_PROLOGUE
+#ifdef PIC
+ subl $12,%esp /* make the stack 16-byte aligned */
+#endif
leal 28(%ecx), %eax
pushl %eax /* (sigset_t*)oset */
pushl $0 /* (sigset_t*)set */
pushl $1 /* SIG_BLOCK */
call PIC_PLT(CNAME(_sigprocmask))
+#ifdef PIC
+ addl $24,%esp
+#else
addl $12,%esp
+#endif
PIC_EPILOGUE
movl 4(%esp),%ecx
2: movl 0(%esp),%edx
@@ -87,12 +94,19 @@ ENTRY(__siglongjmp)
cmpl $0,44(%edx)
jz 2f
PIC_PROLOGUE
+#ifdef PIC
+ subl $12,%esp /* make the stack 16-byte aligned */
+#endif
pushl $0 /* (sigset_t*)oset */
leal 28(%edx), %eax
pushl %eax /* (sigset_t*)set */
pushl $3 /* SIG_SETMASK */
call PIC_PLT(CNAME(_sigprocmask))
+#ifdef PIC
+ addl $24,%esp
+#else
addl $12,%esp
+#endif
PIC_EPILOGUE
movl 4(%esp),%edx
2: movl 8(%esp),%eax
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