diff options
Diffstat (limited to 'arch/mips/kernel/linux32.c')
| -rw-r--r-- | arch/mips/kernel/linux32.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c new file mode 100644 index 00000000..922a554c --- /dev/null +++ b/arch/mips/kernel/linux32.c @@ -0,0 +1,358 @@ +/* + * Conversion between 32-bit and 64-bit native system calls. + * + * Copyright (C) 2000 Silicon Graphics, Inc. + * Written by Ulf Carlsson (ulfc@engr.sgi.com) + * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@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; +} + +/* + * sys_execve() executes a new program. + */ +asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs) +{ + int error; + char * filename; + + filename = getname(compat_ptr(regs.regs[4])); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + goto out; + error = compat_do_execve(filename, compat_ptr(regs.regs[5]), + compat_ptr(regs.regs[6]), ®s); + putname(filename); + +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, ®s, 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); +} |