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Re: [PATCH 09/15] De-PLTize __stack_chk_fail internal calls within libc.so.
On 21 Dec 2016, Florian Weimer uttered the following:
> 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.
I was tempted but thought that it might be a bit presumptuous for
a newbie like me to preempt Adhemerval :)
--
NULL && (void)