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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-04-03 15:44:14 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-04-10 15:43:31 -0300 |
| commit | c02d6d2976c4ab41d60f191fa9ab7e9a25be0788 (patch) | |
| tree | da9c714399aacde55daba473e9848f5febaea7de | |
| parent | 7df625b1cf19041fd9e29269c5729d555eab358b (diff) | |
| download | glibc-c02d6d2976c4ab41d60f191fa9ab7e9a25be0788.tar.gz | |
or1k: Fix Race conditions in pthread cancellation [BZ#12683]
By adding the required syscall_cancel.S.
Checked against a build and make check run-built-tests=no for
or1k-linux-gnu-soft.
| -rw-r--r-- | sysdeps/unix/sysv/linux/or1k/syscall_cancel.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/or1k/syscall_cancel.S b/sysdeps/unix/sysv/linux/or1k/syscall_cancel.S new file mode 100644 index 0000000000..284029b244 --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/syscall_cancel.S @@ -0,0 +1,63 @@ +/* Cancellable syscall wrapper. Linux/or1k 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> + +ENTRY (__syscall_cancel_arch) + l.addi r1, r1, -4 + cfi_def_cfa_offset (4) + l.sw 0(r1), r9 + cfi_offset (9, -4) + + .global __syscall_cancel_arch_start +__syscall_cancel_arch_start: + + /* if (*cancelhandling & CANCELED_BITMASK) + __syscall_do_cancel() */ + l.movhi r19, hi(0) + l.lwz r17, 0(r3) + l.andi r17, r17, 8 + l.sfeq r17, r19 + l.bnf 1f + + /* Issue a 6 argument syscall. */ + l.or r11, r4, r4 + l.or r3, r5, r5 + l.or r4, r6, r6 + l.or r5, r7, r7 + l.or r6, r8, r8 + l.lwz r7, 4(r1) + l.lwz r8, 8(r1) + l.sys 1 + l.nop + + .global __syscall_cancel_arch_end +__syscall_cancel_arch_end: + + l.lwz r9, 0(r1) + l.jr r9 + l.addi r1, r1, 4 + cfi_remember_state + cfi_def_cfa_offset (0) + cfi_restore (9) +1: + cfi_restore_state + l.jal __syscall_do_cancel + l.nop +END (__syscall_cancel_arch) |