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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-04-03 11:29:12 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-04-10 15:42:51 -0300 |
| commit | a199621864c63d5fa44c20a20129b7d428738f77 (patch) | |
| tree | 1cc21c5bf7533b1cf0d29f70a6c43ac552c98bf9 | |
| parent | 9b7719c73513af0c65f650e776d794b2ba759e65 (diff) | |
| download | glibc-a199621864c63d5fa44c20a20129b7d428738f77.tar.gz | |
alpha: Fix Race conditions in pthread cancellation [BZ#12683]
By adding the required syscall_cancel.S.
Checked on alpha-linux-gnu.
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/syscall_cancel.S | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S b/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S new file mode 100644 index 0000000000..377eef48be --- /dev/null +++ b/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S @@ -0,0 +1,80 @@ +/* Cancellable syscall wrapper. Linux/alpha 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 __syscall_cancel_arch (int *ch, + __syscall_arg_t nr, + __syscall_arg_t arg1, + __syscall_arg_t arg2, + __syscall_arg_t arg3, + __syscall_arg_t arg4, + __syscall_arg_t arg5, + __syscall_arg_t arg6) */ + + .set noreorder + .set noat + .set nomacro +ENTRY (__syscall_cancel_arch) + .frame sp, 16, ra, 0 + .mask 0x4000000,-16 + cfi_startproc + ldah gp, 0(t12) + lda gp, 0(gp) + lda sp, -16(sp) + cfi_def_cfa_offset (16) + mov a1, v0 + stq ra, 0(sp) + cfi_offset (26, -16) + .prologue 1 + + .global __syscall_cancel_arch_start +__syscall_cancel_arch_start: + ldl t0, 0(a0) + addl zero, t0, t0 + /* if (*ch & CANCELED_BITMASK) */ + and t0, TCB_CANCELED_BITMASK, t0 + bne t0, 1f + mov a2, a0 + mov a3, a1 + mov a4, a2 + ldq a4, 16(sp) + mov a5, a3 + ldq a5, 24(sp) + .set macro + callsys + .set nomacro + + .global __syscall_cancel_arch_end +__syscall_cancel_arch_end: + subq zero, v0, t0 + ldq ra, 0(sp) + cmovne a3, t0, v0 + lda sp, 16(sp) + cfi_remember_state + cfi_restore (26) + cfi_def_cfa_offset (0) + ret zero, (ra), 1 + .align 4 +1: + cfi_restore_state + ldq t12, __syscall_do_cancel(gp) !literal!2 + jsr ra, (t12), __syscall_do_cancel !lituse_jsr!2 + cfi_endproc +END (__syscall_cancel_arch) |