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Re: New optimized string routines for Intel and alignment of stack.

On 06/11/2016 08:01 AM, Mike Frysinger wrote:
On 07 Jun 2016 17:35, Joseph Myers wrote:
On Tue, 7 Jun 2016, Florian Weimer wrote:
On 06/07/2016 07:56 AM, Carlos O'Donell wrote:
We have had several users that have built legacy applications
for 32-bit x86 with stack alignment that does not match the

Let's say the GNU project broke the i386 ABI, which is more accurate. The
stack pointer alignment requirement is a recent change.

I place the ABI change around 2006, when GCC stopped using
-mpreferred-stack-boundary=2 even with -Os, and so compatibility
requirements as applying to GLIBC_2.4 and older symbols.

indeed, the ship has sailed.  i don't think trying to revert things after
10 years makes sense.!msg/ia32-abi/T5s-UGmUO_E/0-9QgPuB8_MJ

Yeah, I didn't realize the only thing that might work is âpreserve alignment, but don't rely on itâ. Performance-wise, this is the worst option. But maybe we should do this in glibc.


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