Re: 2.2.17pre15 and SA_SIGINFO

From: Andries Brouwer (
Date: Wed Aug 02 2000 - 06:33:41 EST

On Wed, Aug 02, 2000 at 12:14:45AM -0700, H. Peter Anvin wrote:

> I have a program which relies on being able to derive the address
> of a SIGSEGV. To do that, I use the SA_SIGINFO option to sigaction()
> and read out the faulting address from the si_addr parameter of
> the siginfo structure (second argument.)
> I also check si_code for SEGV_ACCERR.
> Under 2.4 kernels, this works great. However, under 2.2.17pre15
> (I downgraded because of stability problems) and glibc 2.1.2,
> si_code and si_addr are both 0. Is this simply unimplemented
> in 2.2 kernels, or is this a bug?

Hmm. Looking at arch/i386/kernel/traps.c I see DO_ERROR_INFO
only since 2.4.0-test1. It looks like this stuff was only
implemented on a few architectures for older kernels.

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