Re: [Crash-utility] crash version 4.0-3.9 is available

On Wed, Nov 08, 2006 at 10:51:00AM -0500, Dave Anderson wrote: > Rachita Kothiyal wrote: > > > > > > If "crash --machdep irq_eframe_link=40 ..." works, then > > > something in x86_64_irq_eframe_link_init() needs to be > > > looked at. > > > > Hi Dave > > > > The dis common_interrupt looks exactly like above and with the > > --machdep irq_eframe_link=40 in the commandline I dont see the bogus > > frames in the bt. > > > > Thanks > > Rachita > > > > Right -- so you'll have to debug x86_64_irq_eframe_link_init(). > and figure out why it's failing to make it to the bottom, where > the link gets initialized. Hi Dave It turns out that the column width of the window I was running crash on was the problem! With a width of 80, the instruction at <common_interrupt+49> seems to be wrapped around. This was causing incomplete instruction getting read into the buffer on a fgets in x86_64_irq_eframe_link_init(). It wasnt reaching till the 'push rbp' instruction at all and this left the irq_eframe_link uninitialised. On increasing the column size it worked fine. crash> dis common_interrupt 0xffffffff80109b34 <common_interrupt>: cld 0xffffffff80109b35 <common_interrupt+1>: sub $0x48,%rsp 0xffffffff80109b39 <common_interrupt+5>: mov %rdi,0x40(%rsp) 0xffffffff80109b3e <common_interrupt+10>: mov %rsi,0x38(%rsp) 0xffffffff80109b43 <common_interrupt+15>: mov %rdx,0x30(%rsp) 0xffffffff80109b48 <common_interrupt+20>: mov %rcx,0x28(%rsp) 0xffffffff80109b4d <common_interrupt+25>: mov %rax,0x20(%rsp) 0xffffffff80109b52 <common_interrupt+30>: mov %r8,0x18(%rsp) 0xffffffff80109b57 <common_interrupt+35>: mov %r9,0x10(%rsp) 0xffffffff80109b5c <common_interrupt+40>: mov %r10,0x8(%rsp) 0xffffffff80109b61 <common_interrupt+45>: mov %r11,(%rsp) 0xffffffff80109b65 <common_interrupt+49>: lea 0xffffffffffffffd0(%rsp),%rdi 0xffffffff80109b6a <common_interrupt+54>: push %rbp 0xffffffff80109b6b <common_interrupt+55>: mov %rsp,%rbp Thanks Rachita