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| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-11-07 12:34:52 -0500 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2015-01-12 06:32:08 -0500 |
| commit | 56cf2763819d2f721c98f2b8bcc04a3c673837d3 (patch) | |
| tree | 5d2fde37897779f64b83951c1ef99406fd384055 /sysdeps/unix | |
| parent | 4b45943a6f62cfc239e79ad8902f5c7f71fd13ec (diff) | |
| download | glibc-56cf2763819d2f721c98f2b8bcc04a3c673837d3.tar.gz glibc-56cf2763819d2f721c98f2b8bcc04a3c673837d3.tar.xz glibc-56cf2763819d2f721c98f2b8bcc04a3c673837d3.zip | |
powerpc: abort transaction in syscalls
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.
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h index 7eaa5bdc45..0b41e8cae0 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h @@ -194,6 +194,7 @@ register long int r11 __asm__ ("r11"); \ register long int r12 __asm__ ("r12"); \ LOADARGS_##nr(name, args); \ + ABORT_TRANSACTION; \ __asm__ __volatile__ \ ("sc \n\t" \ "mfcr %0" \ diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h index a397769841..324e19ba9a 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h @@ -201,6 +201,7 @@ register long int r7 __asm__ ("r7"); \ register long int r8 __asm__ ("r8"); \ LOADARGS_##nr (name, ##args); \ + ABORT_TRANSACTION; \ __asm__ __volatile__ \ ("sc\n\t" \ "mfcr %0\n\t" \ |