RE: single stepping mips remote programs built with gcc 4.0

Newman, Sarah R
2005-11-17T22:39:38Z

> Could you please build a debuggable GDB binary, and trace through
> mips32_next_pc? It looks like it should handle the 'j' instruction
> just fine:
>
> case 2: /* J */
> case 3: /* JAL */
> {
> unsigned long reg;
> reg = jtype_target (inst) << 2;
> /* Upper four bits get never changed... */
> pc = reg + ((pc + 4) & 0xf0000000);
> }
> break;
>
> J and JAL share a format, so this should be correct. It's as if the
> value GDB is extracting for the instruction is incorrect.
>
> --
> Daniel Jacobowitz
> CodeSourcery, LLC
>

I built it with the default options, that good enough? Something like
"-g -O2" it seems.

I doubt that mips32_next_pc is getting compiled in because I can set a
breakpoint at mips_next_pc but not mips32_next_pc.
mips_software_single_step never gets called in this sequence, should it
be?