patches/glibc/2.5/160-use_short_for_fnstsw.patch
author |
"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> |
|
Tue Dec 13 23:32:39 2011 +0100 (2011-12-13) |
changeset 2807 |
4193d6e6a174 |
parent 607 |
aaf7ae5cb11a
|
permissions |
-rw-r--r-- |
scripts: fix dumping execution backtrace
Dumping the backtrace has been broken since changeset #652e56d6d35a:
scripts: execute each steps in a subshell
We can spawn sub-sub-shells in some cases.
The way the fault handler works is to dump the backtrace, but to avoid
printing it once for every sub-shell (which could get quite confusing),
it simply exits when it detects that it is being run in a sub-shell,
leaving to the top-level shell the work to dump the backtrace.
Because each step is executed in its own sub-shell, the variable arrays
that contain the step name, the source file and line number, are lost
when exiting the per-step sub-shell.
Hence, the backtrace is currently limited to printing only the top-level
main procedure of the shell.
Fix this thus:
- when dumping the bckatraces for the steps & the functions, remember
it was dumped, and only dump it if it was not already dumped
- at the top-level shell, print the hints
Also, rename the top-level step label.
Reported-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
yann@607
|
1 |
Original patch from H.J. Lu, as reported there:
|
yann@607
|
2 |
http://www.nabble.com/PATCH:-Use-short-for-fnstsw-td14775171.html
|
yann@607
|
3 |
|
yann@607
|
4 |
fnstsw stores 16bit into %ax. The upper 16bit of %eax is unchanged.
|
yann@607
|
5 |
The new assembler (binutils-2.18.50.0.4 and up) will disallow "fnstsw %eax".
|
yann@607
|
6 |
|
yann@607
|
7 |
diff -dur glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c
|
yann@607
|
8 |
--- glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c 2004-03-05 11:14:48.000000000 +0100
|
yann@607
|
9 |
+++ glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c 2008-06-24 10:56:14.000000000 +0200
|
yann@607
|
10 |
@@ -26,7 +26,7 @@
|
yann@607
|
11 |
int
|
yann@607
|
12 |
fetestexcept (int excepts)
|
yann@607
|
13 |
{
|
yann@607
|
14 |
- int temp;
|
yann@607
|
15 |
+ short temp;
|
yann@607
|
16 |
int xtemp = 0;
|
yann@607
|
17 |
|
yann@607
|
18 |
/* Get current exceptions. */
|