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Re: [PATCH 09/15] De-PLTize __stack_chk_fail internal calls within libc.so.

From: Florian Weimer <fweimer at redhat dot com>
To: Nix <nix at esperi dot org dot uk>, libc-alpha at sourceware dot org
Date: Wed, 21 Dec 2016 16:05:00 +0100
Subject: Re: [PATCH 09/15] De-PLTize __stack_chk_fail internal calls within libc.so.
Authentication-results: sourceware.org; auth=none
References: <20161219111528.14969-1-nix@esperi.org.uk> <20161219111528.14969-10-nix@esperi.org.uk>

On 12/19/2016 12:15 PM, Nix wrote:

From: Adhemerval Zanella <adhemerval.zanella@linaro.org>

We use the same assembler-macro trick we use to de-PLTize
compiler-generated libcalls to memcpy and memset to redirect
__stack_chk_fail to __stack_chk_fail_local.

v5: New.
v6: Only do it within the shared library: with __stack_chk_fail_local
    in libc_pic.a now we don't need to worry about calls from inside
    other routines in libc_nonshared.a any more.
v8: Merge #ifdef blocks.
v10: Use STACK_PROTECTOR_LEVEL to avoid renaming in files where
     stack-protection is suppressed.

	* sysdeps/generic/symbol-hacks.h [STACK_PROTECTOR_LEVEL &&
	STACK_PROTECTOR_LEVEL > 0] (__stack_chk_fail): Add internal alias.


I'm going to fold this into the previous commit.

Thanks,
Florian

Follow-Ups:
- Re: [PATCH 09/15] De-PLTize __stack_chk_fail internal calls within libc.so.
  - From: Nix

References:
- --enable-stack-protector for glibc, v10
  - From: Nix
- [PATCH 09/15] De-PLTize __stack_chk_fail internal calls within libc.so.
  - From: Nix

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