[ECOS] openocd - Unable to set thumb software breakpoint at address

[Szentirmai Gergely]

Hi

I have problems with debugging a AT91SAM7A3
It says: Unable to set thumb software breakpoint at address 00101ad8

According to the openocd source, this message dropped because it was 
unable to write that address (write/read back missmatch)

According to the list file:
void cyg_user_start(void)
{
  101ad4:    b510          push    {r4, lr}
  101ad6:    b086          sub    sp, #24
    diag_init();
  101ad8:    fcb0f002     bl    10443c <diag_init>

So, the address is right, because I want to break cyg_user_start.

Idx Name          Size      VMA       LMA       File off  Algn
...
  8 .text         0000c3dc  00100040  00100040  00008040  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  9 .fini         00000000  0010c41c  0010c41c  00114031  2**0
                  CONTENTS
 10 .rodata       00003fac  0010c41c  0010c41c  0001441c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA

It is in the text segment, ok. Everything seams to be ok. The target was 
halted before the breakpoint was added, and there error is coming when 
resumed/continued running.

Thank you!

Gergely Szentirmai

Here is the output of gdb:

GNU gdb 6.5.50.20060612-cvs
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain 
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-mingw32 --target=arm-elf"...
0x00000018 in ?? ()
Loading section .rom_vectors, size 0x40 lma 0x100000
Loading section .text, size 0xc3dc lma 0x100040
Loading section .rodata, size 0x3fac lma 0x10c41c
Loading section .data, size 0x71c lma 0x1103c8
Start address 0x100040, load size 68324
Transfer rate: 109318 bits/sec, 506 bytes/write.
Breakpoint 1 at 0x101ad8: file main.c, line 179.
software breakpoints enabled
(gdb) continue
Continuing.
Unable to set thumb software breakpoint at address 00101ad8

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