/* * Conversion between 32-bit and 64-bit native system calls. * * Copyright (C) 2000 Silicon Graphics, Inc. * Written by Ulf Carlsson (ulfc@engr.sgi.com) */ #include <linux/compiler.h> #include <linux/mm.h> #include <linux/errno.h> #include <linux/file.h> #include <linux/highuid.h> #include <linux/resource.h> #include <linux/highmem.h> #include <linux/time.h> #include <linux/times.h> #include <linux/poll.h> #include <linux/skbuff.h> #include <linux/filter.h> #include <linux/shm.h> #include <linux/sem.h> #include <linux/msg.h> #include <linux/icmpv6.h> #include <linux/syscalls.h> #include <linux/sysctl.h> #include <linux/utime.h> #include <linux/utsname.h> #include <linux/personality.h> #include <linux/dnotify.h> #include <linux/module.h> #include <linux/binfmts.h> #include <linux/security.h> #include <linux/compat.h> #include <linux/vfs.h> #include <linux/ipc.h> #include <linux/slab.h> #include <net/sock.h> #include <net/scm.h> #include <asm/compat-signal.h> #include <asm/sim.h> #include <asm/uaccess.h> #include <asm/mmu_context.h> #include <asm/mman.h> /* Use this to get at 32-bit user passed pointers. */ /* A() macro should be used for places where you e.g. have some internal variable u32 and just want to get rid of a compiler warning. AA() has to be used in places where you want to convert a function argument to 32bit pointer or when you e.g. access pt_regs structure and want to consider 32bit registers only. */ #define A(__x) ((unsigned long)(__x)) #define AA(__x) ((unsigned long)((int)__x)) #ifdef __MIPSEB__ #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL)) #endif #ifdef __MIPSEL__ #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL)) #endif SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len, unsigned long, prot, unsigned long, flags, unsigned long, fd, unsigned long, pgoff) { unsigned long error; error = -EINVAL; if (pgoff & (~PAGE_MASK >> 12)) goto out; error = sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12)); out: return error; } #define RLIM_INFINITY32 0x7fffffff #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x) struct rlimit32 { int rlim_cur; int rlim_max; }; SYSCALL_DEFINE4(32_truncate64, const char __user *, path, unsigned long, __dummy, unsigned long, a2, unsigned long, a3) { return sys_truncate(path, merge_64(a2, a3)); } SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy, unsigned long, a2, unsigned long, a3) { return sys_ftruncate(fd, merge_64(a2, a3)); } SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high, unsigned int, offset_low, loff_t __user *, result, unsigned int, origin) { return sys_llseek(fd, offset_high, offset_low, result, origin); } /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op + lseek back to original location. They fail just like lseek does on non-seekable files. */ SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count, unsigned long, unused, unsigned long, a4, unsigned long, a5) { return sys_pread64(fd, buf, count, merge_64(a4, a5)); } SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, size_t, count, u32, unused, u64, a4, u64, a5) { return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); } SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid, struct compat_timespec __user *, interval) { struct timespec t; int ret; mm_segment_t old_fs = get_fs(); set_fs(KERNEL_DS); ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); set_fs(old_fs); if (put_user (t.tv_sec, &interval->tv_sec) || __put_user(t.tv_nsec, &interval->tv_nsec)) return -EFAULT; return ret; } #ifdef CONFIG_SYSVIPC SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third, unsigned long, ptr, unsigned long, fifth) { int version, err; version = call >> 16; /* hack for backward compatibility */ call &= 0xffff; switch (call) { case SEMOP: /* struct sembuf is the same on 32 and 64bit :)) */ err = sys_semtimedop(first, compat_ptr(ptr), second, NULL); break; case SEMTIMEDOP: err = compat_sys_semtimedop(first, compat_ptr(ptr), second, compat_ptr(fifth)); break; case SEMGET: err = sys_semget(first, second, third); break; case SEMCTL: err = compat_sys_semctl(first, second, third, compat_ptr(ptr)); break; case MSGSND: err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); break; case MSGRCV: err = compat_sys_msgrcv(first, second, fifth, third, version, compat_ptr(ptr)); break; case MSGGET: err = sys_msgget((key_t) first, second); break; case MSGCTL: err = compat_sys_msgctl(first, second, compat_ptr(ptr)); break; case SHMAT: err = compat_sys_shmat(first, second, third, version, compat_ptr(ptr)); break; case SHMDT: err = sys_shmdt(compat_ptr(ptr)); break; case SHMGET: err = sys_shmget(first, (unsigned)second, third); break; case SHMCTL: err = compat_sys_shmctl(first, second, compat_ptr(ptr)); break; default: err = -EINVAL; break; } return err; } #else SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third, u32, ptr, u32, fifth) { return -ENOSYS; } #endif /* CONFIG_SYSVIPC */ #ifdef CONFIG_MIPS32_N32 SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg) { /* compat_sys_semctl expects a pointer to union semun */ u32 __user *uptr = compat_alloc_user_space(sizeof(u32)); if (put_user(arg, uptr)) return -EFAULT; return compat_sys_semctl(semid, semnum, cmd, uptr); } SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz, int, msgflg) { return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp)); } SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz, int, msgtyp, int, msgflg) { return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64, compat_ptr(msgp)); } #endif SYSCALL_DEFINE1(32_personality, unsigned long, personality) { unsigned int p = personality & 0xffffffff; int ret; if (personality(current->personality) == PER_LINUX32 && personality(p) == PER_LINUX) p = (p & ~PER_MASK) | PER_LINUX32; ret = sys_personality(p); if (ret != -1 && personality(ret) == PER_LINUX32) ret = (ret & ~PER_MASK) | PER_LINUX; return ret; } SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd, compat_off_t __user *, offset, s32, count) { mm_segment_t old_fs = get_fs(); int ret; off_t of; if (offset && get_user(of, offset)) return -EFAULT; set_fs(KERNEL_DS); ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); set_fs(old_fs); if (offset && put_user(of, offset)) return -EFAULT; return ret; } asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, size_t count) { return sys_readahead(fd, merge_64(a2, a3), count); } asmlinkage long sys32_sync_file_range(int fd, int __pad, unsigned long a2, unsigned long a3, unsigned long a4, unsigned long a5, int flags) { return sys_sync_file_range(fd, merge_64(a2, a3), merge_64(a4, a5), flags); } asmlinkage long sys32_fadvise64_64(int fd, int __pad, unsigned long a2, unsigned long a3, unsigned long a4, unsigned long a5, int flags) { return sys_fadvise64_64(fd, merge_64(a2, a3), merge_64(a4, a5), flags); } asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, unsigned offset_a3, unsigned len_a4, unsigned len_a5) { return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3), merge_64(len_a4, len_a5)); } save_static_function(sys32_clone); static int noinline __used _sys32_clone(nabi_no_regargs struct pt_regs regs) { unsigned long clone_flags; unsigned long newsp; int __user *parent_tidptr, *child_tidptr; clone_flags = regs.regs[4]; newsp = regs.regs[5]; if (!newsp) newsp = regs.regs[29]; parent_tidptr = (int __user *) regs.regs[6]; /* Use __dummy4 instead of getting it off the stack, so that syscall() works. */ child_tidptr = (int __user *) __dummy4; return do_fork(clone_flags, newsp, 0, parent_tidptr, child_tidptr); } asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf, size_t len) { return sys_lookup_dcookie(merge_64(a0, a1), buf, len); } SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags, u64, a3, u64, a4, int, dfd, const char __user *, pathname) { return sys_fanotify_mark(fanotify_fd, flags, merge_64(a3, a4), dfd, pathname); } SYSCALL_DEFINE6(32_futex, u32 __user *, uaddr, int, op, u32, val, struct compat_timespec __user *, utime, u32 __user *, uaddr2, u32, val3) { return compat_sys_futex(uaddr, op, val, utime, uaddr2, val3); }