Re: Stepping through signal trampolines

[Andrew Cagney <cagney@gnu.org>]

On GNU/Linux, stepi appears to work, but nexti appears to skip a frame:

(gdb) PASS: gdb.base/siginfo.exp: continue to nexti handler
bt
#0  handler (sig=26, info=0xbfffd550, context=0xbfffd5d0) at 
/home/cygnus/cagney
/PENDING/2004-03-31-sigstack/src/gdb/testsuite/gdb.base/siginfo.c:11
#1  <signal handler called>
#2  main () at 
/home/cygnus/cagney/PENDING/2004-03-31-sigstack/src/gdb/testsuite
/gdb.base/siginfo.c:46
(gdb) PASS: gdb.base/siginfo.exp: backtrace for nexti
nexti
12      } /* handler */
1: x/i $pc  0x80483f9 <handler+13>:     leave
(gdb) nexti
0x080483fa in handler (sig=1, info=0xbfffd9f4, context=0xbfffd9fc) at 
/home/cygn
us/cagney/PENDING/2004-03-31-sigstack/src/gdb/testsuite/gdb.base/siginfo.c:12
12      } /* handler */
1: x/i $pc  0x80483fa <handler+14>:     ret
(gdb) nexti
main () at 
/home/cygnus/cagney/PENDING/2004-03-31-sigstack/src/gdb/testsuite/gdb
.base/siginfo.c:46
46        while (!done);
1: x/i $pc  0x8048483 <main+136>:       mov    0x8049680,%eax
(gdb) FAIL: gdb.base/siginfo.exp: nexti out of handler (in main)

more debugging, but at least there's a test case.

Andrew