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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-04-02 10:36:03 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-04-10 14:02:59 -0300 |
| commit | 6b46ce14834b37a4557341d25bc267340fafc36d (patch) | |
| tree | 2f56611620a8e536947e294d82e87aed06407478 | |
| parent | c9c8107f3cda81810e3f1441fdb54695f3a2df90 (diff) | |
| download | glibc-6b46ce14834b37a4557341d25bc267340fafc36d.tar.gz | |
aarch64: Fix Race conditions in pthread cancellation [BZ#12683]
By adding the required syscall_cancel.S.
Checked on aarch64-linux-gnu.
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S b/sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S new file mode 100644 index 0000000000..e91a431b36 --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S @@ -0,0 +1,59 @@ +/* Cancellable syscall wrapper. Linux/AArch64 version. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <descr-const.h> + +/* long int [x0] __syscall_cancel_arch (int *cancelhandling [x0], + long int nr [x1], + long int arg1 [x2], + long int arg2 [x3], + long int arg3 [x4], + long int arg4 [x5], + long int arg5 [x6], + long int arg6 [x7]) */ + +ENTRY (__syscall_cancel_arch) + + .globl __syscall_cancel_arch_start +__syscall_cancel_arch_start: + + /* if (*cancelhandling & CANCELED_BITMASK) + __syscall_do_cancel() */ + ldr w0, [x0] + tbnz w0, TCB_CANCELED_BIT, 1f + + /* Issue a 6 argument syscall, the nr [x1] being the syscall + number. */ + mov x8, x1 + mov x0, x2 + mov x1, x3 + mov x2, x4 + mov x3, x5 + mov x4, x6 + mov x5, x7 + svc 0x0 + + .globl __syscall_cancel_arch_end +__syscall_cancel_arch_end: + ret + +1: + b __syscall_do_cancel + +END (__syscall_cancel_arch) |