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Date: Sat, 08 Jan 2011 14:14:00 -0000
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Subject: Re: some questions about gdb
From: loody <miloody@gmail.com>
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hi all:

2011/1/8 loody <miloody@gmail.com>:
> hi all:
> I have some questions about using gdb
> 1. I compile the kernel with -g but I cannot see the disassembly.
> My pc increase 4 when I type 'n' but I cannot see the disassembly.
>
> Program received signal 0, Signal 0.
> 0x8043e59c in kernel_entry () at arch/mips/kernel/head.S:97
> 97 =A0 =A0 =A0#else
> (gdb) n
>
> Program received signal 0, Signal 0.
> 0x8043e5a0 in kernel_entry () at arch/mips/kernel/head.S:97
> 97 =A0 =A0 =A0#else
> (gdb) si
>
> Program received signal 0, Signal 0.
> 0x8043e5a4 in kernel_entry () at arch/mips/kernel/head.S:97
> 97 =A0 =A0 =A0#else
> (gdb)
>
> Did I miss any configuration?
>
> 2. I search gdb and which tell me there is a command, disassemble /m,
> which can mix source and assembly.
> But I use it on my mips platform, it said:
> (gdb) disassemble /m irq_enter
> A syntax error in expression, near `/m'.
> (gdb) list
> 276 =A0 =A0 void irq_enter(void)
> 277 =A0 =A0 {
> 278 =A0 =A0 =A0 =A0 =A0 =A0 int cpu =3D smp_processor_id();
> 279
> 280 =A0 =A0 =A0 =A0 =A0 =A0 rcu_irq_enter();
> 281 =A0 =A0 =A0 =A0 =A0 =A0 if (idle_cpu(cpu) && !in_interrupt()) {
> 282 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 __irq_enter();
> 283 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 tick_check_idle(cpu);
> 284 =A0 =A0 =A0 =A0 =A0 =A0 } else
> 285 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 __irq_enter();
> (gdb)
>
> 3. is any document about how to compile insight6.8.1 with mips gdb 7.2?
> I google it and I found for arm version
> http://old.nabble.com/patch-for-insight-6.8.1-to29485252.html
> if I do the same thing for mips gdb, should I patch gdb?
There is something I forget to say, I can successfully compile insight
6.8.1 for debug mips but source window is blank.
so I want to try whether it will be fine if I change the default gdb
from 6.8 to 7.2.
What I only need to do is just change gdb folder with the new one.
thanks a lot,
miloody