GNU MP - PPC 440 build observation

[morten simonsen]

Thanks for the advice, I did find an aliasing compiler difference between the GCC for my host environment and the GCC used for the crosscompilation to target.

The forcing into memory is due to a preallocated and preinitialized stack of "mpf_t" working variables.

Regretfully I still seem to have issues - tried a small program on target:

#include "stdio.h"
#include <stdarg.h>
#include <syslog.h>
#include <gmp.h>

void ka_test() {
   syslog(LOG_ERR,"%s llets startup ...",__FILE__);
   mpf_t  tmp1,tmp2;
   double r=2.5;
   double i=1.234;

   mpf_init(tmp1);
   mpf_init(tmp2);
   
   syslog(LOG_ERR,"tmp1:%f(%f)  re:%f im:%f",mpf_get_d(tmp1),mpf_get_d(tmp2),r,i);
   mpf_set_d(tmp1,r);
   syslog(LOG_ERR,"tmp2:%f(%f)  re:%f im:%f",mpf_get_d(tmp1),mpf_get_d(tmp2),r,i);
   mpf_set_d(tmp2,i);
   syslog(LOG_ERR,"tmp3:%f(%f)  re:%f im:%f",mpf_get_d(tmp1),mpf_get_d(tmp2),r,i);
   
   mpf_clear(tmp1);
   mpf_clear(tmp2);
}

int main(int ac, char *av[])
{
  ka_test();
}

Which yield the following output:

/tmp # ./ka_test
ka_test: ka_test.c llets startup ...
ka_test: tmp1:0.000000(0.000000)  re:2.500000  im:1.234000
ka_test: tmp2:2.500000(2.500000)  re:2.500000  im:1.234000
extract-dbl.c:56: GNU MP assertion failed: d >= 0.0
ka_test: /usr/lib/libdebug.so [0xffdeff4]
ka_test: [0x100380]
ka_test: [0x1e1d]
ka_test: /lib/libc.so.6(abort+0xdc) [0xfec0adc]
ka_test: ./ka_test [0x100010c8]
ka_test: ./ka_test [0x10001148]
ka_test: ./ka_test [0x100008c0]
ka_test: ./ka_test [0x10000614]
ka_test: /lib/libc.so.6 [0xfea989c]
ka_test: /lib/libc.so.6 [0xfea99ac]
ka_test: I'm dying with signal 6 (code -6) for address 0x0x131 at pc 
0xfebf3d0
ka_test: Starting gdbsever on port 7900 for this process 305
Attached; pid = 305
Listening on port 7900

This gives an assertion and the mpf_set_d(tmp1,r) seems to end up assigning r to tmp2 as well.

Any ideas as to what can cause such observation?

Thanks, br

Morten