This is the mail archive of the
mailing list for the glibc project.
Re: Alignment of malloc returned pointer
- From: Nicholas Miell <nmiell at gmail dot com>
- To: Ramana <ramana dot venkat83 at gmail dot com>, libc-alpha at sourceware dot org
- Date: Thu, 11 Dec 2014 16:17:49 -0800
- Subject: Re: Alignment of malloc returned pointer
- Authentication-results: sourceware.org; auth=none
- References: <CAF4ZLkuxQ=n2SOk1B7DB18cx_8nsrfpKmq_GR6wc76o+zVeExg at mail dot gmail dot com>
On 12/11/2014 02:50 AM, Ramana wrote:
In glibc, I understand that the alignment of the pointer returned by
malloc is aligned to at least __alignof__ (long double). For our
target, we want to have a different version of malloc that return the
pointer with less alignment compared to __alignof__ (long double) and
leave the existing malloc version as is.
This isn't allowed, assuming your target has an ABI with
_Alignof(max_align_t) == _Alignof(long double).
For details, take a look at:
7.22.3 Memory management functions
6.2.8 Alignment of objects