Re: [Crash-utility] dis command not correct in crash [ARM]

On Tue, Mar 05, 2013 at 08:26:15AM +0800, Lei Wen wrote: > Hi Mike, > > > On Tue, Mar 5, 2013 at 3:49 AM, Mika Westerberg <mika.westerberg(a)iki.fi&gt;wrote: > > > On Mon, Mar 04, 2013 at 10:20:42AM +0800, Lei Wen wrote: > > > I met "dis" command not correct issue when use the crash, any idea? > > > For built-in "dis" command in crash: > > > crash> dis task_rq_lock > > > 0xc015a2d8 <task_rq_lock>: rscsgt r0, sp, r3, lsl #14 > > > 0xc015a2dc <task_rq_lock+4>: mrcgt 8, 7, r0, cr2, cr13, {5} > > > 0xc015a2e0 <task_rq_lock+8>: mcrvc 8, 4, r3, cr13, cr3, {6} > > > 0xc015a2e4 <task_rq_lock+12>: lslsvc r3, r10, r8 > > > 0xc015a2e8 <task_rq_lock+16>: bl 0xc049fe34 > > > <__ip_route_output_key+220> > > > > Looks weird. > > > > What is the kernel version? Does the 'dis' command work for other > > functions? > > > > Seems other functions is not working either... > Is the page table being corrupted? But I still could parse out the dump > image and check the kernel dmesg for it, which is also weird. If crash is able to show you backtraces etc. I believe it has nothing to do with page table corruption. And the symbols are in vmlinux file anyway. > crash> dis sched_rt_handler > 0xc0160ed8 <sched_rt_handler>: cdppl 13, 5, cr2, cr6, cr13, {4} > 0xc0160edc <sched_rt_handler+4>: stcle 9, cr7, [r7], #132 ; > 0x84 > 0xc0160ee0 <sched_rt_handler+8>: ; <UNDEFINED> > instruction: 0x167256bb > > (gdb) disas sched_rt_handler > Dump of assembler code for function sched_rt_handler: > 0xc0160ed8 <+0>: push {r4, r5, r6, r7, r8, r9, r10, r11, lr} > 0xc0160edc <+4>: add r11, sp, #32 > 0xc0160ee0 <+8>: ldr r4, [pc, #384] ; 0xc0161068 > <sched_rt_handler+400> What does 'nm vmlinux|grep sched_rt_handler' say?

Since the dis command does nothing ARM specific, I wonder if we have GDB version in crash that misses some newer GCC features? What GDB version are you using?