SIGILL on gdbserver/ARM/uclibc

["Harald Schiöberg" <harald@net.t-labs.tu-berlin.de>]

I know that this issue is on the list every other year, but I found no
working solution for my problem.

I'm currently trying to run gdb/gdbserver on OpenWRT/ARM
(uclibc-0.9.29/gcc-4.1.2, tried gdb 6.3 and 6.7.1,
target is xscale (armv5te), host is ubuntu x86_64,
OpenWRT builds gdb with
                gdb_cv_func_sigsetjmp=yes \
                $(PKG_BUILD_DIR)/configure \
                --prefix=$(TOOLCHAIN_DIR) \
                --build=$(GNU_HOST_NAME) \
                --host=$(GNU_HOST_NAME) \
                --target=$(REAL_GNU_TARGET_NAME) \
                $(DISABLE_NLS) \
                --without-uiout \
                --disable-tui --disable-gdbtk --without-x \
                --without-included-gettext \
                --enable-threads \
#	 --disable-gdbmi ## this was commented out for 6.7.1 to compile


I'm getting SIGILL after a breakpoint on the target.

some session-log from 6.7.1:

(gdb)  target remote 172.17.2.190:4000
Remote debugging using 172.17.2.190:4000
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
0x400009d0 in ?? ()
(gdb)  b main
Note: breakpoint 1 also set at pc 0x8570.
Breakpoint 2 at 0x8570: file hello.c, line 6.
(gdb) c
Continuing.

Program received signal SIGILL, Illegal instruction.
0x00008574 in main () at hello.c:6
6               for (i=0; i< 10; i++)
(gdb) s

Program terminated with signal SIGILL, Illegal instruction.
The program no longer exists.
(gdb) show osabi
The current OS ABI is "auto" (currently "GNU/Linux").
The default OS ABI is "GNU/Linux".
(gdb) set osabi GNU/Linux
(gdb) show osabi
The current OS ABI is "GNU/Linux".
The default OS ABI is "GNU/Linux".
(gdb) target remote 172.17.2.190:4000
Remote debugging using 172.17.2.190:4000
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
0x400009d0 in ?? ()
(gdb)  b main
Note: breakpoints 1 and 2 also set at pc 0x8570.
Breakpoint 3 at 0x8570: file hello.c, line 6.
(gdb)  c
Continuing.

Program received signal SIGILL, Illegal instruction.
0x00008574 in main () at hello.c:6
6               for (i=0; i< 10; i++)
(gdb) s
breakpoint.c:7845: internal-error: insert_single_step_breakpoint:
Assertion `single_step
_breakpoints[1] == NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) y


-- 
Harald Schiöberg
Technische Universität Berlin | T-Laboratories | FG INET
www: http://www.net.t-labs.tu-berlin.de
Phone: +49-(0)30-8353-58476 | Fax: +49-(0)391 534 783 47