mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 20:21:07 +00:00
56cf276381
Linux kernel powerpc documentation states issuing a syscall inside a transaction is not recommended and may lead to undefined behavior. It also states syscalls does not abort transactoin neither they run in transactional state. To avoid side-effects being visible outside transactions, GLIBC with lock elision enabled will issue a transaction abort instruction just before all syscalls if hardware supports hardware transactions.
26 lines
992 B
Plaintext
26 lines
992 B
Plaintext
#include <sysdep.h>
|
|
#include <tls.h>
|
|
#include <kernel-features.h>
|
|
|
|
--
|
|
|
|
-- Abuse tls.h macros to derive offsets relative to the thread register.
|
|
# undef __thread_register
|
|
# define __thread_register ((void *) 0)
|
|
# define thread_offsetof(mem) ((ptrdiff_t) THREAD_SELF + offsetof (struct pthread, mem))
|
|
|
|
|
|
#if TLS_MULTIPLE_THREADS_IN_TCB
|
|
MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads)
|
|
#endif
|
|
PID thread_offsetof (pid)
|
|
TID thread_offsetof (tid)
|
|
POINTER_GUARD (offsetof (tcbhead_t, pointer_guard) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
|
|
TAR_SAVE (offsetof (tcbhead_t, tar_save) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
|
|
DSO_SLOT1 (offsetof (tcbhead_t, dso_slot1) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
|
|
DSO_SLOT2 (offsetof (tcbhead_t, dso_slot2) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
|
|
TM_CAPABLE (offsetof (tcbhead_t, tm_capable) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
|
|
#ifndef __ASSUME_PRIVATE_FUTEX
|
|
PRIVATE_FUTEX_OFFSET thread_offsetof (header.private_futex)
|
|
#endif
|