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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>
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#include <tls.h>
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#include <kernel-features.h>
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--
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-- Abuse tls.h macros to derive offsets relative to the thread register.
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# undef __thread_register
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# define __thread_register ((void *) 0)
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# define thread_offsetof(mem) ((ptrdiff_t) THREAD_SELF + offsetof (struct pthread, mem))
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#if TLS_MULTIPLE_THREADS_IN_TCB
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MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads)
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#endif
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PID thread_offsetof (pid)
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TID thread_offsetof (tid)
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POINTER_GUARD (offsetof (tcbhead_t, pointer_guard) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
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TAR_SAVE (offsetof (tcbhead_t, tar_save) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
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DSO_SLOT1 (offsetof (tcbhead_t, dso_slot1) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
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DSO_SLOT2 (offsetof (tcbhead_t, dso_slot2) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
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TM_CAPABLE (offsetof (tcbhead_t, tm_capable) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
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#ifndef __ASSUME_PRIVATE_FUTEX
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PRIVATE_FUTEX_OFFSET thread_offsetof (header.private_futex)
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#endif
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