bfd_get_relocated_section_contents on hppa and ia64

[Nick Clifton]

Hi Camm,

> $ cat /tmp/hh.c
> #include<stdio.h>
>
> int main(int argc,char *argv[]) {
>    printf("hello\n");
>    return 0;
> }

> Target: i486-linux-gnu

> $ ./binutils/readelf -R .text /tmp/hh.o
>
> Hex dump of section '.text':
>    0x00000000 5589e583 e4f083ec 10c70424 00000000 U..........$....
>    0x00000010 e8ebffff ffb80000 0000c9c3          ............

Ah ha!  You have chosen a target architecture which just happens not use 
a special reloc to handle function calls.  If you have a look at the 
relocs in the hh.o file:

   % readelf -r hh.o
   Relocation section '.rel.text' at offset 0x340 contains 2 entries:
    Offset     Info    Type            Sym.Value  Sym. Name
   0000000c  00000501 R_386_32          00000000   .rodata
   00000011  00000902 R_386_PC32        00000000   puts

You will see that it only uses the R_386_32 (a 32-bit fixed-location 
reloc) and the R_386_PC32 (32-bit PC-relative) relocs.  Both of which 
readelf implements because it can find them in debug sections.

If you try compiling your test program for a different architecture, say 
the IA64, then:

   % ia64-elf-gcc -c hh.c
   % ia64-elf-readelf -R .text hh.o
   Hex dump of section '.text':
   readelf: Warning: unable to apply unsupported reloc type 134 to 
section .text
   readelf: Warning: unable to apply unsupported reloc type 135 to 
section .text
   readelf: Warning: unable to apply unsupported reloc type 73 to 
section .text
   0x00000000 00181d0c 80054002 30004280 0167fc8c ......@.0.B..g..

Or the HPPA:

   % hppa-linux-gnu-gcc -c hh.c
   % hppa-linux-gnu-readelf -R .text hh.o
   Hex dump of section '.text':
   readelf: Warning: unable to apply unsupported reloc type 2 to section 
.text
   readelf: Warning: unable to apply unsupported reloc type 6 to section 
.text
   readelf: Warning: unable to apply unsupported reloc type 12 to 
section .text
   0x00000000 6bc23fd9 08030241 081e0243 6fc10080 k.?....A...Co...

Cheers
   Nick