[ECOS] Gdb 6.7, gcc 4.2.2, redboot on arm (gba), "target remote" doesn't work.

[Gary Thomas]

Andrew Lunn wrote:
> On Fri, Jan 18, 2008 at 07:39:28PM +0100, Paul Chavent wrote:
>> Hello.
>>
>> I have found that it fails in hal/arm/arch/current/src/hal_misc.c at void breakpoint(void).
>>
>> When i execute
>> void
>> breakpoint(void)
>> {
>>   diag_printf("breakpoint\n");
>>     HAL_BREAKPOINT(_breakinst);
>>   diag_printf("breakpoint\n");
>> }
>> The second trace doesn't appear and the target reboot.
>>
>> When i try to compile
>> void
>> breakpoint(void)
>> {
>>   diag_printf("breakpoint %p\n", _breakinst);
>>     HAL_BREAKPOINT(_breakinst);
>>   diag_printf("breakpoint %p\n", _breakinst);
>> }
>> I have hal_misc.c:230: error: `_breakinst' undeclared (first use in this function)
> 
> The magic for this is in:
> 
> /packages/hal/arm/arch/current/include/hal_arch.h
> 
> I don't remember who this works on ARM. Maybe it uses a Software
> interrupt?

IIRC, it uses an officially sanctioned illegal instruction.

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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