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// SPDX-License-Identifier: GPL-2.0
/*
* Compat system call wrappers.
*
* Copyright IBM Corp. 2014
*/
#include <linux/syscalls.h>
#include <linux/compat.h>
#include "entry.h"
#define COMPAT_SYSCALL_WRAP1(name, ...) \
COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_WRAP2(name, ...) \
COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_WRAP3(name, ...) \
COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_WRAP4(name, ...) \
COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_WRAP5(name, ...) \
COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_WRAP6(name, ...) \
COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
#define __SC_COMPAT_TYPE(t, a) \
__typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
#define __SC_COMPAT_CAST(t, a) \
({ \
long __ReS = a; \
\
BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \
!__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \
if (__TYPE_IS_L(t)) \
__ReS = (s32)a; \
if (__TYPE_IS_UL(t)) \
__ReS = (u32)a; \
if (__TYPE_IS_PTR(t)) \
__ReS = a & 0x7fffffff; \
(t)__ReS; \
})
/*
* The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by
* compat tasks. These wrappers will only be used for system calls where only
* the system call arguments need sign or zero extension or zeroing of the upper
* 33 bits of pointers.
* Note: since the wrapper function will afterwards call a system call which
* again performs zero and sign extension for all system call arguments with
* a size of less than eight bytes, these compat wrappers only touch those
* system call arguments with a size of eight bytes ((unsigned) long and
* pointers). Zero and sign extension for e.g. int parameters will be done by
* the regular system call wrappers.
*/
#define COMPAT_SYSCALL_WRAPx(x, name, ...) \
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__));\
asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)) \
{ \
return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__)); \
}
COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
COMPAT_SYSCALL_WRAP2(rename, const char __user *, oldname, const char __user *, newname);
COMPAT_SYSCALL_WRAP2(mkdir, const char __user *, pathname, umode_t, mode);
COMPAT_SYSCALL_WRAP1(rmdir, const char __user *, pathname);
COMPAT_SYSCALL_WRAP1(pipe, int __user *, fildes);
COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);
COMPAT_SYSCALL_WRAP2(signal, int, sig, __sighandler_t, handler);
COMPAT_SYSCALL_WRAP1(acct, const char __user *, name);
COMPAT_SYSCALL_WRAP2(umount, char __user *, name, int, flags);
COMPAT_SYSCALL_WRAP1(chroot, const char __user *, filename);
COMPAT_SYSCALL_WRAP3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask);
COMPAT_SYSCALL_WRAP2(sethostname, char __user *, name, int, len);
COMPAT_SYSCALL_WRAP2(symlink, const char __user *, old, const char __user *, new);
COMPAT_SYSCALL_WRAP3(readlink, const char __user *, path, char __user *, buf, int, bufsiz);
COMPAT_SYSCALL_WRAP1(uselib, const char __user *, library);
COMPAT_SYSCALL_WRAP2(swapon, const char __user *, specialfile, int, swap_flags);
COMPAT_SYSCALL_WRAP4(reboot, int, magic1, int, magic2, unsigned int, cmd, void __user *, arg);
COMPAT_SYSCALL_WRAP2(munmap, unsigned long, addr, size_t, len);
COMPAT_SYSCALL_WRAP3(syslog, int, type, char __user *, buf, int, len);
COMPAT_SYSCALL_WRAP1(swapoff, const char __user *, specialfile);
COMPAT_SYSCALL_WRAP2(setdomainname, char __user *, name, int, len);
COMPAT_SYSCALL_WRAP1(newuname, struct new_utsname __user *, name);
COMPAT_SYSCALL_WRAP3(mprotect, unsigned long, start, size_t, len, unsigned long, prot);
COMPAT_SYSCALL_WRAP3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs);
COMPAT_SYSCALL_WRAP2(delete_module, const char __user *, name_user, unsigned int, flags);
COMPAT_SYSCALL_WRAP4(quotactl, unsigned int, cmd, const char __user *, special, qid_t, id, void __user *, addr);
COMPAT_SYSCALL_WRAP2(bdflush, int, func, long, data);
COMPAT_SYSCALL_WRAP3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2);
COMPAT_SYSCALL_WRAP5(llseek, unsigned int, fd, unsigned long, high, unsigned long, low, loff_t __user *, result, unsigned int, whence);
COMPAT_SYSCALL_WRAP3(msync, unsigned long, start, size_t, len, int, flags);
COMPAT_SYSCALL_WRAP2(mlock, unsigned long, start, size_t, len);
COMPAT_SYSCALL_WRAP2(munlock, unsigned long, start, size_t, len);
COMPAT_SYSCALL_WRAP2(sched_setparam, pid_t, pid, struct sched_param __user *, param);
COMPAT_SYSCALL_WRAP2(sched_getparam, pid_t, pid, struct sched_param __user *, param);
COMPAT_SYSCALL_WRAP3(sched_setscheduler, pid_t, pid, int, policy, struct sched_param __user *, param);
COMPAT_SYSCALL_WRAP5(mremap, unsigned long, addr, unsigned long, old_len, unsigned long, new_len, unsigned long, flags, unsigned long, new_addr);
COMPAT_SYSCALL_WRAP3(poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout);
COMPAT_SYSCALL_WRAP5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, unsigned long, arg4, unsigned long, arg5);
COMPAT_SYSCALL_WRAP2(getcwd, char __user *, buf, unsigned long, size);
COMPAT_SYSCALL_WRAP2(capget, cap_user_header_t, header, cap_user_data_t, dataptr);
COMPAT_SYSCALL_WRAP2(capset, cap_user_header_t, header, const cap_user_data_t, data);
COMPAT_SYSCALL_WRAP3(lchown, const char __user *, filename, uid_t, user, gid_t, group);
COMPAT_SYSCALL_WRAP2(getgroups, int, gidsetsize, gid_t __user *, grouplist);
COMPAT_SYSCALL_WRAP2(setgroups, int, gidsetsize, gid_t __user *, grouplist);
COMPAT_SYSCALL_WRAP3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid);
COMPAT_SYSCALL_WRAP3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid);
COMPAT_SYSCALL_WRAP3(chown, const char __user *, filename, uid_t, user, gid_t, group);
COMPAT_SYSCALL_WRAP2(pivot_root, const char __user *, new_root, const char __user *, put_old);
COMPAT_SYSCALL_WRAP3(mincore, unsigned long, start, size_t, len, unsigned char __user *, vec);
COMPAT_SYSCALL_WRAP3(madvise, unsigned long, start, size_t, len, int, behavior);
COMPAT_SYSCALL_WRAP5(setxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
COMPAT_SYSCALL_WRAP5(lsetxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
COMPAT_SYSCALL_WRAP5(fsetxattr, int, fd, const char __user *, name, const void __user *, value, size_t, size, int, flags);
COMPAT_SYSCALL_WRAP3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count);
COMPAT_SYSCALL_WRAP4(getxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
COMPAT_SYSCALL_WRAP4(lgetxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
COMPAT_SYSCALL_WRAP4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size);
COMPAT_SYSCALL_WRAP3(listxattr, const char __user *, path, char __user *, list, size_t, size);
COMPAT_SYSCALL_WRAP3(llistxattr, const char __user *, path, char __user *, list, size_t, size);
COMPAT_SYSCALL_WRAP3(flistxattr, int, fd, char __user *, list, size_t
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