sim/1959: ARMulator hangs running executable with wrong ABI

[flash at pobox dot com]

>Number:         1959
>Category:       sim
>Synopsis:       ARMulator hangs running executable with wrong ABI
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 14 03:18:02 UTC 2005
>Closed-Date:
>Last-Modified:
>Originator:     Flash Sheridan
>Release:        2.6.8-24.14-default target=arm-none-elf host=i686-pc-linux-gnu
>Organization:
>Environment:
Linux thrallis 2.6.8-24.14-default #1 Tue Mar 29 09:27:43 UTC 2005 i686 i686 i386 GNU/Linux

arm-softfloat-linux-gnu-gcc -v
Reading specs from /opt/crosstool/arm-softfloat-linux-gnu/gcc-3.4.1-glibc-2.3.3/lib/gcc/arm-softfloat-linux-gnu/3.4.1/specs
Configured with: /home/kennetha/crosstool-0.29/build/arm-softfloat-linux-gnu/gcc-3.4.1-glibc-2.3.3/gcc-3.4.1/configure --target=arm-softfloat-linux-gnu --host=i686-host_pc-linux-gnu --prefix=/opt/crosstool/arm-softfloat-linux-gnu/gcc-3.4.1-glibc-2.3.3 --with-float=soft --with-headers=/opt/crosstool/arm-softfloat-linux-gnu/gcc-3.4.1-glibc-2.3.3/arm-softfloat-linux-gnu/include --with-local-prefix=/opt/crosstool/arm-softfloat-linux-gnu/gcc-3.4.1-glibc-2.3.3/arm-softfloat-linux-gnu --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c,c++ --enable-shared --enable-c99 --enable-long-long
Thread model: posix
gcc version 3.4.1

This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-none-elf".
...
warning: A handler for the OS ABI "GNU/Linux" is not built into this configuration
of GDB.  Attempting to continue with the default arm settings.
>Description:
    Trying to simulate the execution of a simple C file (just "int main() {return 0;}" compiled with
arm-softfloat-linux-gnu/gcc-3.4.1-glibc-2.3.3
hangs the simulator, or runs out of memory.
    GDB (no doubt reasonably) warns about ABI problems; see the How-To-Repeat field.  So running the cross-compiled executable badly would be acceptable.  But hanging and sucking up CPU and memory seems poor behavior for a debugger, even if the code it's trying to debug is buggy.
    (See also bug #1884, where I got the instructions for building and running the simulator.)
>How-To-Repeat:
/opt/crosstool/arm-softfloat-linux-gnu/gcc-3.4.1-glibc-2.3.3/bin/arm-softfloat-linux-gnu-gcc  -g ../c/simple/simple.c -o ~/simple-arm.out

/opt/gdb-63-arm/bin/arm-none-elf-gdb

(gdb) file ~/simple-arm.out
warning: A handler for the OS ABI "GNU/Linux" is not built into this configuration
of GDB.  Attempting to continue with the default arm settings.

Reading symbols from /home/flash/simple-arm.out...done.
(gdb) target sim
Connected to the simulator.
(gdb) load
...
(gdb) start
Breakpoint 1 at 0x846c: file ../c/simple/simple.c, line 2.
Starting program: /home/flash/simple-arm.out

[CPU usage goes to 100%, and nothing happens for a long time.

ARMulator can't allocate VM page: Cannot allocate memory

[The last line doesn't always happen, and/or may take some time.]

Or, a simpler route to what seems like the same problem:

'/opt/gdb-63-arm/bin/arm-none-elf-run' -v ~/simple-arm.out
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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