* [PATCH] backtrace fix for s390-32.
@ 2003-03-21 14:19 Martin Schwidefsky
2003-03-26 4:01 ` Roland McGrath
0 siblings, 1 reply; 2+ messages in thread
From: Martin Schwidefsky @ 2003-03-21 14:19 UTC (permalink / raw)
To: libc-hacker
Hi,
for s390-32 there is a problem with backtrace/backtrace_symbols.
backtrace returns addresses that can have the high order bit set (the
bas/basr instructions used for function calling do this). These bits
have to be removed in backtrace or backtrace_symbols won't
return the correct symbols information.
blue skies,
Martin.
2003-03-21 Martin Schwidefsky <schwidefskyde.ibm.com>
* sysdeps/s390/s390-32/backtrace.c (__backtrace): Remove high order
bit from backtrace addresses.
diff -urN libc/sysdeps/s390/s390-32/backtrace.c libc-s390/sysdeps/s390/s390-32/backtrace.c
--- libc/sysdeps/s390/s390-32/backtrace.c Fri Jul 6 06:56:03 2001
+++ libc-s390/sysdeps/s390/s390-32/backtrace.c Fri Mar 21 10:14:15 2003
@@ -71,7 +71,7 @@
out of range. */
break;
- array[cnt++] = stack->save_grps[8];
+ array[cnt++] = stack->save_grps[8] & 0x7fffffff;
stack = (struct layout *) stack->back_chain;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] backtrace fix for s390-32.
2003-03-21 14:19 [PATCH] backtrace fix for s390-32 Martin Schwidefsky
@ 2003-03-26 4:01 ` Roland McGrath
0 siblings, 0 replies; 2+ messages in thread
From: Roland McGrath @ 2003-03-26 4:01 UTC (permalink / raw)
To: Martin Schwidefsky; +Cc: libc-hacker
> for s390-32 there is a problem with backtrace/backtrace_symbols.
> backtrace returns addresses that can have the high order bit set (the
> bas/basr instructions used for function calling do this).
That's pretty mysterious to me, but I'll take your word for it and put the
change in.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2003-03-26 4:01 ` Roland McGrath
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