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Linux: Use ptrdiff_t for __rseq_offset

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This matches the data size initial-exec relocations use on most
targets.

Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer 2022-02-02 22:37:20 +01:00
parent 80a08d0faa
commit 6c33b01843
13 changed files with 15 additions and 14 deletions
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2
manual/threads.texi
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@ -1004,7 +1004,7 @@ The manual for the @code{rseq} system call can be found
at @uref{https://git.kernel.org/pub/scm/libs/librseq/librseq.git/tree/doc/man/rseq.2}.
@end deftp
@deftypevar {int} __rseq_offset
@deftypevar {ptrdiff_t} __rseq_offset
@standards{Linux, sys/rseq.h}
This variable contains the offset between the thread pointer (as defined
by @code{__builtin_thread_pointer} or the thread pointer register for

4
sysdeps/nptl/dl-tls_init_tp.c
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@ -46,7 +46,7 @@ rtld_mutex_dummy (pthread_mutex_t *lock)
const unsigned int __rseq_flags;
const unsigned int __rseq_size attribute_relro;
const int __rseq_offset attribute_relro;
const ptrdiff_t __rseq_offset attribute_relro;
void
__tls_pre_init_tp (void)
@ -119,7 +119,7 @@ __tls_init_tp (void)
all targets support __thread_pointer, so set __rseq_offset only
if thre rseq registration may have happened because RSEQ_SIG is
defined. */
extern int offset __asm__ ("__rseq_offset");
extern ptrdiff_t offset __asm__ ("__rseq_offset");
offset = (char *) &pd->rseq_area - (char *) __thread_pointer ();
#endif
}

2
sysdeps/unix/sysv/linux/aarch64/ld.abilist
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@ -5,5 +5,5 @@ GLIBC_2.17 _dl_mcount F
GLIBC_2.17 _r_debug D 0x28
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4

2
sysdeps/unix/sysv/linux/alpha/ld.abilist
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@ -4,6 +4,6 @@ GLIBC_2.1 _dl_mcount F
GLIBC_2.3 __tls_get_addr F
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4
GLIBC_2.4 __stack_chk_guard D 0x8

2
sysdeps/unix/sysv/linux/ia64/ld.abilist
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@ -4,5 +4,5 @@ GLIBC_2.2 _r_debug D 0x28
GLIBC_2.3 __tls_get_addr F
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4

2
sysdeps/unix/sysv/linux/mips/mips64/n64/ld.abilist
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@ -4,6 +4,6 @@ GLIBC_2.2 _dl_mcount F
GLIBC_2.3 __tls_get_addr F
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4
GLIBC_2.4 __stack_chk_guard D 0x8

2
sysdeps/unix/sysv/linux/powerpc/powerpc64/be/ld.abilist
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@ -6,5 +6,5 @@ GLIBC_2.3 _dl_mcount F
GLIBC_2.3 _r_debug D 0x28
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4

2
sysdeps/unix/sysv/linux/powerpc/powerpc64/le/ld.abilist
View File

@ -6,5 +6,5 @@ GLIBC_2.22 __tls_get_addr_opt F
GLIBC_2.23 __parse_hwcap_and_convert_at_platform F
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4

2
sysdeps/unix/sysv/linux/riscv/rv64/ld.abilist
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@ -5,5 +5,5 @@ GLIBC_2.27 _dl_mcount F
GLIBC_2.27 _r_debug D 0x28
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4

2
sysdeps/unix/sysv/linux/s390/s390-64/ld.abilist
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@ -4,5 +4,5 @@ GLIBC_2.2 _r_debug D 0x28
GLIBC_2.3 __tls_get_offset F
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4

2
sysdeps/unix/sysv/linux/sparc/sparc64/ld.abilist
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@ -4,5 +4,5 @@ GLIBC_2.2 _r_debug D 0x28
GLIBC_2.3 __tls_get_addr F
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4

3
sysdeps/unix/sysv/linux/sys/rseq.h
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@ -21,6 +21,7 @@
/* Architecture-specific rseq signature. */
#include <bits/rseq.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/cdefs.h>
#include <bits/endian.h>
@ -172,7 +173,7 @@ struct rseq
#endif /* __GLIBC_HAVE_KERNEL_RSEQ */
/* Offset from the thread pointer to the rseq area. */
extern const int __rseq_offset;
extern const ptrdiff_t __rseq_offset;
/* Size of the registered rseq area. 0 if the registration was
unsuccessful. */

2
sysdeps/unix/sysv/linux/x86_64/64/ld.abilist
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@ -4,5 +4,5 @@ GLIBC_2.2.5 _r_debug D 0x28
GLIBC_2.3 __tls_get_addr F
GLIBC_2.34 __rtld_version_placeholder F
GLIBC_2.35 __rseq_flags D 0x4
GLIBC_2.35 __rseq_offset D 0x4
GLIBC_2.35 __rseq_offset D 0x8
GLIBC_2.35 __rseq_size D 0x4