Illegal instruction - pthread example

Hi everyone,

I'm trying to execute the pthread example available on examples.tgz folder,
but getting the following error when execute it:

[root@FriendlyARM plg]# ls
armpthread  pen
[root@FriendlyARM plg]# ./armpthread
Illegal instruction
[root@FriendlyARM plg]# 

I followed the steps described on "7.2.8 Thread programming examples" from
micro 2440 user manual. I Attached the source code, with some additional
debug lines (printf) that i had wrote, but the program doesn't even run.

Compiling it with g++ and testing on Ubuntu works fine.
The libpthread.so is on place, so i have no more ideas.

[root@FriendlyARM /lib]# ls -la | grep pthread
-rwxr-xr-x    1 root     root        84248 Mar 26  2009 libpthread-2.8.so
lrwxrwxrwx    1 root     root           17 Apr 29  2009 libpthread.so.0 ->
libpthread-2.8.so
[root@FriendlyARM /lib]# 

Thanks in advance


PS:
my Makefile:

CROSS=arm-linux-

all: pthread_test

pthread_test:
  $(CROSS)gcc -static -o pthread_test pthread_test.c -lpthread

clean:
  @rm -vf pthread_test *.o *~

What is the armpthread file?
The execution file name is pthread_test from your makefile.

sorry, forget to say that i renamed the cross compiled file to armpthread.
I was testing it on ubuntu as pthread_test (gcc compile) and on qtopia
(arm-linux-gcc compile) as armpthread. I did that to don't make any mess
with names... xD

I have only seen:

arm-none-linux-gnueabi- 

used for CROSS_COMPILE
but then again I am a beginner.

Davef, take a look at your .../arm/4.3.2/bin directory.

I have arm-none-linux-gnueabi- and a lot of other executables: 

-rwxr-xr-x 1 eduardo eduardo      62 2009-03-25 04:19 arm-linux-g++
-rwxr-xr-x 1 eduardo eduardo      62 2009-03-25 04:19 arm-linux-gcc

-rwxr-xr-x 2 eduardo eduardo  194440 2008-11-18 13:06
arm-none-linux-gnueabi-g++
-rwxr-xr-x 2 eduardo eduardo  192168 2008-11-18 13:06
arm-none-linux-gnueabi-gcc

I got these files on micro 2440 DVD. 

Can anybody compile and test this pthread example on mini/micro 2440 for me
please?


Thanks in advance.

eduardo,

I know they (arm-linux- variants) are in there and that they are the same
size as the ones labelled arm-none-linux-gnueabi-, but for a reason that I
do not understand people always seem to put:

CROSS_COMPILE=arm-none-linux-gnueabi-

Sorry that doesn't help you with your problem.

I'll have look at your example tonight after work.

Dave

eduardo,

Don't know if this will be much help . . . I am using Eclipse and to do a
cross-compile I have to make the source file thread.cpp to get it to build.

I changed your:
main()
to
int main(void)
and it didn't get rid to the warning on line 19, but it looks like you have
more serious problems. 

**** Internal Builder is used for build               ****
arm-none-linux-gnueabi-g++ -O0 -g3 -Wall -c -fmessage-length=0
-osrc/thread.o ../src/thread.cpp
../src/thread.cpp:19: warning: ISO C++ forbids declaration of 'main' with
no type
../src/thread.cpp: In function 'int main()':
../src/thread.cpp:26: error: invalid conversion from 'void*' to 'void*
(*)(void*)'
../src/thread.cpp:26: error:   initializing argument 3 of 'int
pthread_create(pthread_t*, const pthread_attr_t*, void* (*)(void*), void*)'
Build error occurred, build is stopped
Time consumed: 719  ms.

Good luck!

Davef, 

Thanks again for your help. YOU ARE GREAT!! 
With your help I solved the problem. I changed the compiler to g++ and
built other pthread_test executable. New source code is attached. 
Have no time to test it now, but i think the big mistake was on "-static"
parameter on the first makefile.

xD

regards

ps: makefile:

CROSS=arm-linux-

all: compile

compile:
  g++ -o pthread_test pthread_test.c -lpthread

cross:
  $(CROSS)g++ -o pthread_test pthread_test.c -lpthread

clean:
  @rm -vf pthread_test *.o *~

While searching on an Illegal Instruction I'm getting, I found your post. 
Not sure if your issue is the same as mine, but I tracked mine down to the
use of a virtual function.  I cannot find any way to get a virtual function
to execute without producing an "Illegal Instruction".  Here is a simple
C++ program that runs fine on i386 and crashes on arm (compiled with 4.3.2
version of arm-none-linux-gnueabi-g++):

Is there a fix to this in a later version of the arm compiler?

------ CUT HERE ------
#include <stdio.h>
#include <stdlib.h>

class Illegal {
public:
  virtual void Crash();
};

void Illegal::Crash() {
  printf("Made it!\n");
}

int main() {
  printf("main\n");
  Illegal* i=new Illegal();
  i->Crash();
  delete i;
}
------- CUT HERE -------

My mistake-- I had previously gotten by without using the -mcpu=arm9 flag
when compiling.  Having written an almost 5000 line program without running
into this problem, I didn't suspect it until I assembled the program and
saw the use of the BLX instruction was causing the crash.  Adding the flag
fixes the problem nicely.