[Crash-utility] User-land backtrace?

Gallus gall.cwpl at gmail.com
Wed Feb 24 17:05:34 UTC 2010


On 24 February 2010 13:45, Dave Anderson <anderson at redhat.com> wrote:
> Right -- you should see the user-space return-address values starting
> from the point shown in the ESP (386) or RSP (x86_64) value shown
> in the kernel entry-point exception frame.  Although the first few
> frames will typically be in a user library instead of the binary.
>
> Dave

Here is the bt:
 #0 [f672de20] schedule at c0616008
 #1 [f672de98] schedule_timeout at c061675c
 #2 [f672debc] do_futex at c0438ea7
 #3 [f672df80] sys_futex at c0439942
 #4 [f672dfb8] system_call at c0404f10
    EAX: 000000f0  EBX: 0a50db84  ECX: 00000000  EDX: 00000b73
    DS:  007b      ESI: bfd90dd8  ES:  007b      EDI: 00000b73
    SS:  007b      ESP: bfd90dd0  EBP: bfd90e24
    CS:  0073      EIP: 00f14402  ERR: 000000f0  EFLAGS: 00200206


I then do "rd -u bfd90dd0 16" and search for the addresses in the
binary, but they're not found. Is ESP's value the one that I should be
reading from?

Gallus




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