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authorH.J. Lu <hjl.tools@gmail.com>2012-03-19 16:21:21 -0700
committerH.J. Lu <hjl.tools@gmail.com>2012-03-19 16:21:21 -0700
commit24d8f4b7dc85b8f4c8907527ec92c9d2e5fdce7c (patch)
treede889115270ccf956afc6d4ca16b114cf903fe94 /nptl
parent490df6c44152fb9f4ade4963c60dfd82025ff2eb (diff)
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Use __asm__("rsp") to get CURRENT_STACK_FRAME
Diffstat (limited to 'nptl')
-rw-r--r--nptl/ChangeLog5
-rw-r--r--nptl/sysdeps/x86_64/pthreaddef.h2
2 files changed, 6 insertions, 1 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index ad4725f422..ad345f9505 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,5 +1,10 @@
 2012-03-19  H.J. Lu  <hongjiu.lu@intel.com>
 
+	* sysdeps/x86_64/pthreaddef.h (CURRENT_STACK_FRAME): Use
+	register char * __asm__("rsp") to get stack frame.
+
+2012-03-19  H.J. Lu  <hongjiu.lu@intel.com>
+
 	* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (SYS_futex): Use
 	__NR_futex directly.
 
diff --git a/nptl/sysdeps/x86_64/pthreaddef.h b/nptl/sysdeps/x86_64/pthreaddef.h
index 7e45be47ab..50587b8692 100644
--- a/nptl/sysdeps/x86_64/pthreaddef.h
+++ b/nptl/sysdeps/x86_64/pthreaddef.h
@@ -41,7 +41,7 @@
 
 /* Location of current stack frame.  The frame pointer is not usable.  */
 #define CURRENT_STACK_FRAME \
-  ({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; })
+  ({ register char *frame __asm__("rsp"); frame; })
 
 
 /* XXX Until we have a better place keep the definitions here.  */