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[Bug libc/1458] mremap() fifth argument and MREMAP_FIXED not exposed in glibc
- From: "fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Fri, 20 May 2016 14:23:57 +0000
- Subject: [Bug libc/1458] mremap() fifth argument and MREMAP_FIXED not exposed in glibc
- Auto-submitted: auto-generated
- References: <bug-1458-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=1458
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fweimer at redhat dot com
Flags| |security-
--- Comment #6 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to Arun Sharma from comment #5)
> Making mremap() a function with variable number of arguments changes the ABI
> on
> x86_64. Code compiled before this change will treat %rax as scratch. After
> the
> change, the calling conventions expect %al to be set to the number of XMM
> registers passed.
If the called function does not use any floating point registers, this
difference is immaterial.
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