[Linux-ia64] sigcontext structure

[Linux-ia64] sigcontext structure

[shiva chetan]

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where can i find info on sigcontext structure on linux/ia-64 ? specifically which registers hold the faulting address/type on a segmention fault and the trap no on a SIGTRAP ?

thanks
chetan

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Re: [Linux-ia64] sigcontext structure

[Aneesh Kumar K.V]

Hi, 

Using sigaction with siginfo will help you in catching those address. 

siginfo.si_addr carry the faulting  address 

and  the below statement shows how it is calcluated  
siginfo.si_addr = (void *) (regs->cr_iip + ia64_psr(regs)->ri); 

where regs is pt_regs. 



-aneesh 


On Sun, 2002-10-06 at 23:13, shiva chetan wrote:
> where can i find info on sigcontext structure on linux/ia-64 ?
> specifically which registers hold the faulting address/type on a
> segmention fault and the trap no on a SIGTRAP ?
>  
> thanks
> chetan

[Linux-ia64] sigcontext structure

[shiva chetan]

Hi,

The sigcontext structure of linux/i386 has the following fields

trapno (stores trap number)
err   (stores faulting address)
cr2  (contains type of fault)

what are the equivalent fields in the sigcontext structure of linux/ia64 ?
its not very apparent from the definition of the structure.

thanks

chetan
Dept of Computer Science
Univ of Illinois at Urbana-Champaign

Ph: (217) 333-9051, (217) 244-5110 (O)
      (217) 384-2173 (R)

Re: [Linux-ia64] sigcontext structure

[David Mosberger]

>>>>> On Wed, 13 Nov 2002 12:42:20 -0600, "shiva chetan" <chetan@uiuc.edu> said:

  Chetan> Hi, The sigcontext structure of linux/i386 has the following
  Chetan> fields

  Chetan> trapno (stores trap number) err (stores faulting address)
  Chetan> cr2 (contains type of fault)

  Chetan> what are the equivalent fields in the sigcontext structure
  Chetan> of linux/ia64 ?  its not very apparent from the definition
  Chetan> of the structure.

There is no 1-to-1 correspondence, but such info is stored in siginfo
on ia64.  See siginfo.h.

	--david