Hi,
I started development on TMS470R1A384 and have problem with endianness
in OpenOCD. Please consider following scenario:
- generated big-endian elf file
- OpenOCD configured:
target create TMS470 arm7tdmi -endian big -chain-position 0
RAM mapped at 0x00000000 - 0x00007FFFF
- Eclipse/GDB configured
Initialize commands:
target remote localhost:3333
Run commands:
monitor reset init
load
continue
- I added LOG_INFO to arm7_9_common.c line 238:
if ((retval = target->type->read_memory(target,
breakpoint->address,
4, 1, (u8 *)&verify)) != ERROR_OK)
{
return retval;
}
LOG_INFO("verify=%08x arm7_9->arm_bkpt=%08x", verify,
arm7_9->arm_bkpt);
if (verify != arm7_9->arm_bkpt)
{
LOG_ERROR("Unable to set 32 bit software
breakpoint at address %08x
- check that memory is read/writable", breakpoint->address);
return ERROR_OK;
}
Breakpoint is set on main(), address 0x00000150. Here is log from gdb:
target remote localhost:3333
0xac090000 in ?? ()
monitor reset init
JTAG device found: 0x3100e02f (Manufacturer: 0x017, Part: 0x100e,
Version: 0x3)
target state: halted
target halted in ARM state due to debug-request, current mode:
Supervisor
cpsr: 0xa00000d3 pc: 0x00000000
load
Loading section .text, size 0x164 lma 0x0
Start address 0x0, load size 356
Transfer rate: 7 KB/sec, 356 bytes/write.
continue
verify=eedeeede arm7_9->arm_bkpt=deeedeee
Unable to set 32 bit software breakpoint at address 00000150 - check
that memory is read/writable
Breakpoint 1, main () at main.c:13
13 x -= 10;
mon mdw 0x150 0x10
0x00000150: deeedeee e243300a e50b3010 eafffffe 51eb851f 6c0efaa6
a888bbbe 22f8b274
0x00000170: 7018fa3f 38c25b4b c34a3bee a3145ca5 408ce3fa 5ae1a1a3
dd74aeff 471cb75b
Problems:
- cannot set software breakpoint at specified address - somewhere is
mismatch in converting between endiannesses
- after pressing F5 (step), message:
Cannot find bounds of current function
- "Disassembly window": instead of presenting disassembled memory view
starting from address 0x00000150 it shows view from address 0x50010000
- Breakpoint on address 0x00000000. Instruction expected on disassembled
window:
b _start
it shows:
0x00000000 <_boot>: cdple 14, 14, cr13, cr14, cr14, {7}
After pressing F5 (step) it jumps to address 0x04000000.
- however if I start stepping in telnet session, PC register changes
it's value correctly
I compiled latest sources from SVN.
Regards,
Krzysztof
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