relocation truncated to fit

[Richard Guenther]

On 7/26/07, Canqun Yang <canqun@yahoo.com.cn> wrote:
> Hi, all
>
> Can anyone help me to resolve this problem?
>
> When I compile a program with .bss segement larger than 2.0GB, I get the
> following error message from GNU linker (binutils-2.15).
>
> (.text+0x305): In function `sta_':
> : relocation truncated to fit: R_X86_64_32S plot_
> ......
>
> I upgrade the assembler and the linker from binutis-2.17, then get the
> message below.
>
> STA.o: In function `sta_':
> STA.F:(.text+0x305): relocation truncated to fit: R_X86_64_32S against
> symbol `plot_' defined in COMMON section in STA.o
>
> So, I modified the binutils-2.17/bfd/elf64-x86-64.c and rebuild the linker
> to ignore the relocation errors. Though the executable generated,
> segementation fault occurred during execution.
>
> Here is the configuration of my computer:
>
> CPU: Intel(R) Xeon(R) CPU            5150  @ 2.66GHz
> OS: Linux mds 2.6.9-34.EL_lustre.1.4.6.1custom #3 SMP Fri Jul 13 15:27:27
> CST 2007 x86_64 x86_64 x86_64 GNU/Linux
> Compiler: Intel C++/Fortran compiler for linux 10.0
>
> I also wrote a program with large uninitialized data -- more than 2.0GB.
> It passes after linked with the modified linker. The source code is appended.

Try using -mcmodel=medium

Richard.

> #define N 0x05fff
>
> double a[N][N];
>
> int
> main ()
> {
>   int i, j;
>   double sum;
>
>   for (i = 0; i < N; i+=5)
>     for (j = 0; j < N; j+=5)
>       a[i][j] = 2* i*j + i*i + j*j;
>
>
>   sum = 0.0;
>   for (i = 0; i < N; i+=5)
>     for (j = 0; j < N; j+=5)
>       sum += a[i][j];
>
>   printf ("%f\n", sum);
> }
>
>
> Best regards,
>
> Canqun Yang
>
>
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