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author | Alistair Francis <alistair.francis@wdc.com> | 2019-12-23 11:45:01 -0800 |
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committer | Alistair Francis <alistair.francis@wdc.com> | 2020-04-02 09:21:06 -0700 |
commit | a51e03588937ad804a9f583ea3d0fc0a4d088c33 (patch) | |
tree | f77bf16cbc4562ca3cc40625042406f20f230e78 /sysdeps/unix/sysv/linux | |
parent | 1c634e677f584ea264f984eb408a5142150af855 (diff) | |
download | glibc-a51e03588937ad804a9f583ea3d0fc0a4d088c33.tar.gz glibc-a51e03588937ad804a9f583ea3d0fc0a4d088c33.tar.xz glibc-a51e03588937ad804a9f583ea3d0fc0a4d088c33.zip |
linux: Use long time_t __getitimer/__setitimer
The Linux kernel expects itimerval to use a 32-bit time_t, even on archs with a 64-bit time_t (like RV32). To address this let's convert itimerval to/from 32-bit and 64-bit to ensure the kernel always gets a 32-bit time_t. While we are converting these functions let's also convert them to be the y2038 safe versions. This means there is a *64 function that is called by a backwards compatible wrapper. Tested-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/unix/sysv/linux')
-rw-r--r-- | sysdeps/unix/sysv/linux/getitimer.c | 61 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/setitimer.c | 90 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/tv32-compat.h | 31 |
3 files changed, 182 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/getitimer.c b/sysdeps/unix/sysv/linux/getitimer.c new file mode 100644 index 0000000000..cb894a5516 --- /dev/null +++ b/sysdeps/unix/sysv/linux/getitimer.c @@ -0,0 +1,61 @@ +/* getitimer -- Get the state of an interval timer. Linux/32 version. + Copyright (C) 2020 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 <time.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sysdep.h> +#include <tv32-compat.h> + +int +__getitimer64 (__itimer_which_t which, struct __itimerval64 *curr_value) +{ +#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 + return INLINE_SYSCALL_CALL (getitimer, which, curr_value); +#else + struct __itimerval32 curr_value_32; + + if (INLINE_SYSCALL_CALL (getitimer, which, &curr_value_32) == -1) + return -1; + + curr_value->it_interval + = valid_timeval32_to_timeval64 (curr_value_32.it_interval); + curr_value->it_value + = valid_timeval32_to_timeval64 (curr_value_32.it_value); + return 0; +#endif +} + +#if __TIMESIZE != 64 +libc_hidden_def (__getitimer64) +int +__getitimer (__itimer_which_t which, struct itimerval *curr_value) +{ + struct __itimerval64 val64; + if (__getitimer64 (which, &val64) != 0) + return -1; + + curr_value->it_interval + = valid_timeval64_to_timeval (val64.it_interval); + curr_value->it_value + = valid_timeval64_to_timeval (val64.it_value); + + return 0; +} +#endif +weak_alias (__getitimer, getitimer) diff --git a/sysdeps/unix/sysv/linux/setitimer.c b/sysdeps/unix/sysv/linux/setitimer.c new file mode 100644 index 0000000000..03aff21f11 --- /dev/null +++ b/sysdeps/unix/sysv/linux/setitimer.c @@ -0,0 +1,90 @@ +/* setitimer -- Set the state of an interval timer. Linux/32 version. + Copyright (C) 2020 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 <time.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sysdep.h> +#include <tv32-compat.h> + +int +__setitimer64 (__itimer_which_t which, + const struct __itimerval64 *restrict new_value, + struct __itimerval64 *restrict old_value) +{ +#if __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 + return INLINE_SYSCALL_CALL (setitimer, which, new_value, old_value); +#else + struct __itimerval32 new_value_32; + + if (! in_time_t_range (new_value->it_interval.tv_sec) + || ! in_time_t_range (new_value->it_value.tv_sec)) + { + __set_errno (EOVERFLOW); + return -1; + } + new_value_32.it_interval + = valid_timeval64_to_timeval32 (new_value->it_interval); + new_value_32.it_value + = valid_timeval64_to_timeval32 (new_value->it_value); + + if (old_value == NULL) + return INLINE_SYSCALL_CALL (setitimer, which, &new_value_32, NULL); + + struct __itimerval32 old_value_32; + if (INLINE_SYSCALL_CALL (setitimer, which, &new_value_32, &old_value_32) + == -1) + return -1; + + old_value->it_interval + = valid_timeval32_to_timeval64 (old_value_32.it_interval); + old_value->it_value + = valid_timeval32_to_timeval64 (old_value_32.it_value); + return 0; +#endif +} + +#if __TIMESIZE != 64 +libc_hidden_def (__setitimer64) +int +__setitimer (__itimer_which_t which, + const struct itimerval *restrict new_value, + struct itimerval *restrict old_value) +{ + int ret; + struct __itimerval64 new64, old64; + + new64.it_interval + = valid_timeval_to_timeval64 (new_value->it_interval); + new64.it_value + = valid_timeval_to_timeval64 (new_value->it_value); + + ret = __setitimer64 (which, &new64, old_value ? &old64 : NULL); + + if (ret == 0 && old_value != NULL) + { + old_value->it_interval + = valid_timeval64_to_timeval (old64.it_interval); + old_value->it_value + = valid_timeval64_to_timeval (old64.it_value); + } + + return ret; +} +#endif +weak_alias (__setitimer, setitimer) diff --git a/sysdeps/unix/sysv/linux/tv32-compat.h b/sysdeps/unix/sysv/linux/tv32-compat.h new file mode 100644 index 0000000000..061a3539e2 --- /dev/null +++ b/sysdeps/unix/sysv/linux/tv32-compat.h @@ -0,0 +1,31 @@ +/* Compatibility definitions for 'struct timeval' with 32-bit time_t. + Copyright (C) 2020 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/>. */ + +#ifndef _TV32_COMPAT_H +#define _TV32_COMPAT_H 1 + +#include <bits/types/time_t.h> + +/* Structures containing 'struct timeval' with 32-bit time_t. */ +struct __itimerval32 +{ + struct __timeval32 it_interval; + struct __timeval32 it_value; +}; + +#endif /* tv32-compat.h */ |