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| author | Florian Weimer <fweimer@redhat.com> | 2024-07-08 21:14:00 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2024-07-16 16:35:29 +0200 |
| commit | e8f521709731ce3ae8d6f1eca30135d5c0606f02 (patch) | |
| tree | 8ff191e039b2bde1fb55acc7c7003a2b11aa4f92 /sysdeps/nptl | |
| parent | 143a7a06235cf091b63f58a739c8367ffe54a722 (diff) | |
| download | glibc-e8f521709731ce3ae8d6f1eca30135d5c0606f02.tar.gz glibc-e8f521709731ce3ae8d6f1eca30135d5c0606f02.tar.xz glibc-e8f521709731ce3ae8d6f1eca30135d5c0606f02.zip | |
Linux: Make __rseq_size useful for feature detection (bug 31965)
The __rseq_size value is now the active area of struct rseq (so 20 initially), not the full struct size including padding at the end (32 initially). Update misc/tst-rseq to print some additional diagnostics. Reviewed-by: Michael Jeanson <mjeanson@efficios.com> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> (cherry picked from commit 2e456ccf0c34a056e3ccafac4a0c7effef14d918)
Diffstat (limited to 'sysdeps/nptl')
| -rw-r--r-- | sysdeps/nptl/dl-tls_init_tp.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/sysdeps/nptl/dl-tls_init_tp.c b/sysdeps/nptl/dl-tls_init_tp.c index 7eb35fb133..7803e19fd1 100644 --- a/sysdeps/nptl/dl-tls_init_tp.c +++ b/sysdeps/nptl/dl-tls_init_tp.c @@ -46,10 +46,6 @@ rtld_mutex_dummy (pthread_mutex_t *lock) const unsigned int __rseq_flags; -/* The variables are in .data.relro but are not yet write-protected. */ -extern unsigned int _rseq_size attribute_hidden; -extern ptrdiff_t _rseq_offset attribute_hidden; - void __tls_pre_init_tp (void) { @@ -106,9 +102,7 @@ __tls_init_tp (void) bool do_rseq = true; do_rseq = TUNABLE_GET (rseq, int, NULL); if (rseq_register_current_thread (pd, do_rseq)) - { - _rseq_size = sizeof (pd->rseq_area); - } + _rseq_size = RSEQ_AREA_SIZE_INITIAL_USED; #ifdef RSEQ_SIG /* This should be a compile-time constant, but the current |