[PATCH] x86-64: Move nptl/rseq-access.h to nptl/64 [BZ #32543]

H.J. Lu hjl.tools@gmail.com
Sat Jan 11 05:20:42 GMT 2025


commit 494d65129ed5ae1154b75cc189bbdde5e9ecf1df
Author: Michael Jeanson <mjeanson@efficios.com>
Date:   Thu Aug 1 10:35:34 2024 -0400

    nptl: Introduce <rseq-access.h> for RSEQ_* accessors

added things like

       asm volatile ("movl %%fs:%P1(%q2),%0"                                  \
                     : "=r" (__value)                                         \
                     : "i" (offsetof (struct rseq_area, member)),             \
                       "r" (__rseq_offset));

But this doesn't work for x32 when __rseq_offset is negative since the
address is computed as

FS + 32-bit to 64-bit zero extension of __rseq_offset
+ offsetof (struct rseq_area, member)

Move x86_64/nptl/rseq-access.h to x86_64/nptl/64/rseq-access.h so that
sysdeps/nptl/rseq-access.h is used for x32.  This fixes BZ #32543.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
 sysdeps/x86_64/nptl/{ => 64}/rseq-access.h | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename sysdeps/x86_64/nptl/{ => 64}/rseq-access.h (100%)

diff --git a/sysdeps/x86_64/nptl/rseq-access.h b/sysdeps/x86_64/nptl/64/rseq-access.h
similarity index 100%
rename from sysdeps/x86_64/nptl/rseq-access.h
rename to sysdeps/x86_64/nptl/64/rseq-access.h
-- 
2.47.1



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