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| author | H.J. Lu <hjl.tools@gmail.com> | 2025-01-11 22:57:02 +0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2025-01-12 07:08:27 +0800 |
| commit | 0b6ad02b33448c0b8b6fdd781dffad329d1f0f7d (patch) | |
| tree | 165d8350aa79c7c30bc1a1355e4e8a0407a87698 /sysdeps/unix | |
| parent | 53a71b9f66dbc7f0ce44ec95bff7caa31fa0374b (diff) | |
| download | glibc-0b6ad02b33448c0b8b6fdd781dffad329d1f0f7d.zip glibc-0b6ad02b33448c0b8b6fdd781dffad329d1f0f7d.tar.gz glibc-0b6ad02b33448c0b8b6fdd781dffad329d1f0f7d.tar.bz2 | |
x86-64: Cast __rseq_offset to long long int [BZ #32543]
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)
Cast __rseq_offset to long long int
"r" ((long long int) __rseq_offset)); \
to sign-extend 32-bit __rseq_offset to 64-bit. This is a no-op for x86-64
since x86-64 __rseq_offset is 64-bit. This fixes BZ #32543.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'sysdeps/unix')
0 files changed, 0 insertions, 0 deletions