Re: ARM/Linux OSABI problems (was Re: breakpoints not working in gdbserver)

[Simon Posnjak <simon.posnjak@siol.net>]

On Wed, 2002-08-14 at 15:10, Daniel Jacobowitz wrote:
> ... wait!  I know what's wrong.  Does uClibc provide a .note.ABI-tag
> section, like glibc does?  If not, that needs to be corrected, or GDB
> needs to find some other way to recognize uClibc binaries.

You're right(objdump):
arm-linux:
**********
Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .interp       00000013  000080f4  000080f4  000000f4  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  1 .note.ABI-tag 00000020  00008110  00008110  00000110  2**4
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  2 .hash         00000198  00008130  00008130  00000130  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  3 .dynsym       000003f0  000082c8  000082c8  000002c8  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  4 .dynstr       000001fd  000086b8  000086b8  000006b8  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  5 .gnu.version  0000007e  000088b6  000088b6  000008b6  2**1
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .gnu.version_r 00000030  00008934  00008934  00000934  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  7 .rel.got      00000008  00008964  00008964  00000964  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  8 .rel.bss      00000020  0000896c  0000896c  0000096c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  9 .rel.plt      000001c0  0000898c  0000898c  0000098c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 10 .init         00000018  00008b4c  00008b4c  00000b4c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 11 .plt          00000390  00008b64  00008b64  00000b64  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 12 .text         000047d8  00008ef4  00008ef4  00000ef4  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 13 .fini         00000014  0000d6cc  0000d6cc  000056cc  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 14 .rodata       00001564  0000d6e0  0000d6e0  000056e0  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 15 .data         00000168  00016c44  00016c44  00006c44  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 16 .ctors        00000008  00016dac  00016dac  00006dac  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 17 .dtors        00000008  00016db4  00016db4  00006db4  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 18 .got          000000f0  00016dbc  00016dbc  00006dbc  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 19 .dynamic      000000a0  00016eac  00016eac  00006eac  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 20 .sbss         00000000  00016f4c  00016f4c  00006f50  2**0
                  CONTENTS
 21 .bss          00004b24  00016f50  00016f50  00006f50  2**4
                  ALLOC
 22 .comment      000001ee  00000000  00000000  00006f50  2**0
                  CONTENTS, READONLY
uclibc:
*******
Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .interp       00000014  000080d4  000080d4  000000d4  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  1 .hash         00000704  000080e8  000080e8  000000e8  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  2 .dynsym       00000fa0  000087ec  000087ec  000007ec  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  3 .dynstr       00000824  0000978c  0000978c  0000178c  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  4 .rel.bss      00000048  00009fb0  00009fb0  00001fb0  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  5 .rel.plt      00000700  00009ff8  00009ff8  00001ff8  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .plt          00000e10  0000a6f8  0000a6f8  000026f8  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  7 .text         00037560  0000b508  0000b508  00003508  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  8 .rodata       0000ccd0  00042a68  00042a68  0003aa68  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  9 .data         00000778  00057738  00057738  00047738  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 10 .got          00000390  00057eb0  00057eb0  00047eb0  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 11 .dynamic      00000078  00058240  00058240  00048240  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 12 .sbss         00000000  000582b8  000582b8  000482b8  2**0
                  CONTENTS
 13 .bss          00007d20  000582b8  000582b8  000482b8  2**3
                  ALLOC

What do you think what would be the best solution? I liked the idea that
Andrew Cagney give:

>        (gdb) set architecture <machine> <osabi>
>
>the user should be able to force the <osabi> so that they can extract
>themselves from situtations such as this.

I will do this if you think it is a good idea. (Plese give me some
pointers where to start becouse I'm new to gdb sources)

	Regards Simon

-- 
Simon Posnjak
http://klada.dyndns.org