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author | Al Viro <viro@zeniv.linux.org.uk> | 2017-05-14 19:52:01 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-05-21 13:10:51 -0400 |
commit | 7e95a225901a5d2fd140f14b4302805cecc22da7 (patch) | |
tree | 58a2fe751d56838c2f907f830f0f6745b3228876 | |
parent | a8c39544a6eb2093c04afd5005b6192bd0e880c6 (diff) | |
download | linux-7e95a225901a5d2fd140f14b4302805cecc22da7.tar.bz2 |
move compat wait4 and waitid next to native variants
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r-- | kernel/compat.c | 66 | ||||
-rw-r--r-- | kernel/exit.c | 69 |
2 files changed, 69 insertions, 66 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index 933bcb31ae10..b4cdba6bbd02 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -543,72 +543,6 @@ int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) return 0; } -COMPAT_SYSCALL_DEFINE4(wait4, - compat_pid_t, pid, - compat_uint_t __user *, stat_addr, - int, options, - struct compat_rusage __user *, ru) -{ - if (!ru) { - return sys_wait4(pid, stat_addr, options, NULL); - } else { - struct rusage r; - int ret; - unsigned int status; - mm_segment_t old_fs = get_fs(); - - set_fs (KERNEL_DS); - ret = sys_wait4(pid, - (stat_addr ? - (unsigned int __user *) &status : NULL), - options, (struct rusage __user *) &r); - set_fs (old_fs); - - if (ret > 0) { - if (put_compat_rusage(&r, ru)) - return -EFAULT; - if (stat_addr && put_user(status, stat_addr)) - return -EFAULT; - } - return ret; - } -} - -COMPAT_SYSCALL_DEFINE5(waitid, - int, which, compat_pid_t, pid, - struct compat_siginfo __user *, uinfo, int, options, - struct compat_rusage __user *, uru) -{ - siginfo_t info; - struct rusage ru; - long ret; - mm_segment_t old_fs = get_fs(); - - memset(&info, 0, sizeof(info)); - - set_fs(KERNEL_DS); - ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, - uru ? (struct rusage __user *)&ru : NULL); - set_fs(old_fs); - - if ((ret < 0) || (info.si_signo == 0)) - return ret; - - if (uru) { - /* sys_waitid() overwrites everything in ru */ - if (COMPAT_USE_64BIT_TIME) - ret = copy_to_user(uru, &ru, sizeof(ru)); - else - ret = put_compat_rusage(&ru, uru); - if (ret) - return -EFAULT; - } - - BUG_ON(info.si_code & __SI_MASK); - info.si_code |= __SI_CHLD; - return copy_siginfo_to_user32(uinfo, &info); -} - static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, unsigned len, struct cpumask *new_mask) { diff --git a/kernel/exit.c b/kernel/exit.c index 516acdb0e0ec..f98782bd27b6 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -62,6 +62,7 @@ #include <linux/kcov.h> #include <linux/random.h> #include <linux/rcuwait.h> +#include <linux/compat.h> #include <linux/uaccess.h> #include <asm/unistd.h> @@ -1735,3 +1736,71 @@ SYSCALL_DEFINE3(waitpid, pid_t, pid, int __user *, stat_addr, int, options) } #endif + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(wait4, + compat_pid_t, pid, + compat_uint_t __user *, stat_addr, + int, options, + struct compat_rusage __user *, ru) +{ + if (!ru) { + return sys_wait4(pid, stat_addr, options, NULL); + } else { + struct rusage r; + int ret; + unsigned int status; + mm_segment_t old_fs = get_fs(); + + set_fs (KERNEL_DS); + ret = sys_wait4(pid, + (stat_addr ? + (unsigned int __user *) &status : NULL), + options, (struct rusage __user *) &r); + set_fs (old_fs); + + if (ret > 0) { + if (put_compat_rusage(&r, ru)) + return -EFAULT; + if (stat_addr && put_user(status, stat_addr)) + return -EFAULT; + } + return ret; + } +} + +COMPAT_SYSCALL_DEFINE5(waitid, + int, which, compat_pid_t, pid, + struct compat_siginfo __user *, infop, int, options, + struct compat_rusage __user *, uru) +{ + siginfo_t info; + struct rusage ru; + long ret; + mm_segment_t old_fs = get_fs(); + + memset(&info, 0, sizeof(info)); + + set_fs(KERNEL_DS); + ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, + uru ? (struct rusage __user *)&ru : NULL); + set_fs(old_fs); + + if ((ret < 0) || (info.si_signo == 0)) + return ret; + + if (uru) { + /* sys_waitid() overwrites everything in ru */ + if (COMPAT_USE_64BIT_TIME) + ret = copy_to_user(uru, &ru, sizeof(ru)); + else + ret = put_compat_rusage(&ru, uru); + if (ret) + return -EFAULT; + } + + BUG_ON(info.si_code & __SI_MASK); + info.si_code |= __SI_CHLD; + return copy_siginfo_to_user32(infop, &info); +} +#endif |