From: none <ytrezq@sdf-eu.org>
To: Linux Kernel <linux-kernel@vger.kernel.org>,
linux-x86_64@vger.kernel.org
Subject: Getting the way a SIGSEGV append when catching a SIGSEGV from within
Date: Mon, 27 Mar 2017 16:45:42 +0200 [thread overview]
Message-ID: <bce22a1c127bf19825637bcd326c6f00@mx.sdfeu.org> (raw)
Hello,
There’s three way to perform an invalid memory access :
The attempt to execute/jump at an invalid address.
The attempt to read at an invalid address.
The attempt to write at an invalid address.
Determining the execute case with rt_sigaction is easy : the last value
of eip match the value of the address which caused the segfault.
But how to know if the SIGSEGV occurred by a read or by a write attempt
? In the same time shouldn’t that information belong in the mmu ?
next reply other threads:[~2017-03-27 14:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-27 14:45 none [this message]
2017-03-27 15:30 ` Richard Weinberger
2017-03-27 18:55 ` none
2017-03-27 19:20 ` Richard Weinberger
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