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author | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2018-01-12 18:50:33 -0200 |
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committer | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2018-01-19 09:50:09 -0200 |
commit | 4612268a0ad8e3409d8ce2314dd2dd8ee0af5269 (patch) | |
tree | acae53363aaa961433f545260843c0e9ba5fb238 /time | |
parent | 64f63cb4583ecc1ba16c7253aacc192b6d088511 (diff) | |
download | glibc-4612268a0ad8e3409d8ce2314dd2dd8ee0af5269.tar.gz glibc-4612268a0ad8e3409d8ce2314dd2dd8ee0af5269.tar.xz glibc-4612268a0ad8e3409d8ce2314dd2dd8ee0af5269.zip |
powerpc: Fix syscalls during early process initialization [BZ #22685]
The tunables framework needs to execute syscall early in process initialization, before the TCB is available for consumption. This behavior conflicts with powerpc{|64|64le}'s lock elision code, that checks the TCB before trying to abort transactions immediately before executing a syscall. This patch adds a powerpc-specific implementation of __access_noerrno that does not abort transactions before the executing syscall. Tested on powerpc{|64|64le}. [BZ #22685] * sysdeps/powerpc/powerpc32/sysdep.h (ABORT_TRANSACTION_IMPL): Renamed from ABORT_TRANSACTION. (ABORT_TRANSACTION): Redirect to ABORT_TRANSACTION_IMPL. * sysdeps/powerpc/powerpc64/sysdep.h (ABORT_TRANSACTION, ABORT_TRANSACTION_IMPL): Likewise. * sysdeps/unix/sysv/linux/powerpc/not-errno.h: New file. Reuse Linux code, but remove the code that aborts transactions. Signed-off-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> Tested-by: Aurelien Jarno <aurelien@aurel32.net>
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