Patchwork Do not clobber r12 for ia64 syscalls

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Submitter Joseph Myers
Date Dec. 13, 2018, 6:09 p.m.
Message ID <alpine.DEB.2.21.1812131809220.2735@digraph.polyomino.org.uk>
Download mbox | patch
Permalink /patch/30663/
State Committed
Headers show

Comments

Joseph Myers - Dec. 13, 2018, 6:09 p.m.
GCC mainline now gives errors for an asm that clobbers the stack
pointer.  According to
<https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00932.html> GCC
previously ignored such a clobber; thus, this patch removes it from
the clobbers for ia64 syscalls.

Tested with build-many-glibcs.py for ia64-linux-gnu.

2018-12-13  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/unix/sysv/linux/ia64/sysdep.h (ASM_CLOBBERS_6_COMMON):
	Do not clobber r12.
Joseph Myers - Dec. 17, 2018, 4:55 p.m.
Ping.  This patch 
<https://sourceware.org/ml/libc-alpha/2018-12/msg00470.html> is pending 
review.
Andreas Schwab - Dec. 17, 2018, 4:59 p.m.
On Dez 13 2018, Joseph Myers <joseph@codesourcery.com> wrote:

> 	* sysdeps/unix/sysv/linux/ia64/sysdep.h (ASM_CLOBBERS_6_COMMON):
> 	Do not clobber r12.

Ok.

Andreas.

Patch

diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h
index f8f8d900c6..0505b966d2 100644
--- a/sysdeps/unix/sysv/linux/ia64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h
@@ -346,7 +346,7 @@ 
 #define ASM_CLOBBERS_5	ASM_CLOBBERS_6, "out5"
 #define ASM_CLOBBERS_6_COMMON	, "out6", "out7",			\
   /* Non-stacked integer registers, minus r8, r10, r15.  */		\
-  "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18",	\
+  "r2", "r3", "r9", "r11", "r13", "r14", "r16", "r17", "r18",		\
   "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27",	\
   "r28", "r29", "r30", "r31",						\
   /* Predicate registers.  */						\