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http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/linux/sh/socket.S.diff?r1=1.5&r2=1.6&cvsroot=glibc
Ankur Sheth said:
"The problem that I ran into was that multi-threaded apps would crash with a
seg fault when they invoked some of the socket calls (sendto() in my case.
This happened only on the sh4. Turns out that a certain register (PR) was
not being saved and restored properly before and after invoking the system
call. This patch fixes it. It applies cleanly on glibc 2.3.2.
[Thanks to Kaz for helping us find this.]"
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/unix/sysv/linux/sh/socket.S,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -r1.5 -r1.6
--- libc/sysdeps/unix/sysv/linux/sh/socket.S 2003/01/05 11:07:44 1.5
+++ libc/sysdeps/unix/sysv/linux/sh/socket.S 2003/07/12 01:25:53 1.6
@@ -94,7 +94,9 @@
#if defined NEED_CANCELLATION && defined CENABLE
.Lsocket_cancel:
/* Enable asynchronous cancellation. */
+ sts.l pr,@-r15
CENABLE
+ lds.l @r15+,pr
/* Do the system call trap. */
mov #+P(SOCKOP_,socket), r4
@@ -102,9 +104,11 @@
mov.l .L1,r3
trapa #0x12
+ sts.l pr,@-r15
mov.l r0,@-r15
CDISABLE
mov.l @r15+,r0
+ lds.l @r15+,pr
/* Pop args off the stack */
P(POPARGS_,NARGS)
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