PR/59327 CVS commit: src/lib/libc/arch/mips/gen

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

The following reply was made to PR kern/59327; it has been noted by GNATS.

From: "Taylor R Campbell" <riastradh%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/59327 CVS commit: src/lib/libc/arch/mips/gen
Date: Fri, 25 Apr 2025 00:08:38 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Fri Apr 25 00:08:38 UTC 2025
 
 Modified Files:
 	src/lib/libc/arch/mips/gen: _resumecontext.S
 
 Log Message:
 mips __resumecontext: Align private stack frame size.
 
 On mips64, UCONTEXT_SIZE is 664=0x298 (n32) or 744=0x2e8 (n64), but
 sp is required to have 16-byte alignment in the ABI, so we need to
 round the stack frame allocation up to 0x2a0 or 0x2f0.
 
 No functional change intended on mips o32.  Unlikely to have a
 practical change on mips n32/n64, but possible if signal delivery
 wins a race -- until we fix sp alignment in signal handler calls,
 coming soon.
 
 Based on a patch by rin@.
 
 PR kern/59327: user stack pointer is not aligned properly
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.13 -r1.14 src/lib/libc/arch/mips/gen/_resumecontext.S
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.