579 lines
14 KiB
C
579 lines
14 KiB
C
/*
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* Conversion between 32-bit and 64-bit native system calls.
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*
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* Copyright (C) 2000 Silicon Graphics, Inc.
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* Written by Ulf Carlsson (ulfc@engr.sgi.com)
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* sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
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*/
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#include <linux/compiler.h>
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/file.h>
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#include <linux/smp_lock.h>
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#include <linux/highuid.h>
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#include <linux/dirent.h>
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#include <linux/resource.h>
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#include <linux/highmem.h>
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#include <linux/time.h>
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#include <linux/times.h>
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#include <linux/poll.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/filter.h>
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#include <linux/shm.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/icmpv6.h>
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#include <linux/syscalls.h>
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#include <linux/sysctl.h>
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#include <linux/utime.h>
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#include <linux/utsname.h>
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#include <linux/personality.h>
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#include <linux/dnotify.h>
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#include <linux/module.h>
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#include <linux/binfmts.h>
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#include <linux/security.h>
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#include <linux/compat.h>
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#include <linux/vfs.h>
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#include <net/sock.h>
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#include <net/scm.h>
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#include <asm/compat-signal.h>
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#include <asm/ipc.h>
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#include <asm/sim.h>
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#include <asm/uaccess.h>
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#include <asm/mmu_context.h>
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#include <asm/mman.h>
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/* Use this to get at 32-bit user passed pointers. */
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/* A() macro should be used for places where you e.g.
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have some internal variable u32 and just want to get
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rid of a compiler warning. AA() has to be used in
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places where you want to convert a function argument
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to 32bit pointer or when you e.g. access pt_regs
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structure and want to consider 32bit registers only.
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*/
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#define A(__x) ((unsigned long)(__x))
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#define AA(__x) ((unsigned long)((int)__x))
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#ifdef __MIPSEB__
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#define merge_64(r1,r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
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#endif
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#ifdef __MIPSEL__
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#define merge_64(r1,r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
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#endif
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/*
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* Revalidate the inode. This is required for proper NFS attribute caching.
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*/
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int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
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{
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struct compat_stat tmp;
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if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
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return -EOVERFLOW;
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memset(&tmp, 0, sizeof(tmp));
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tmp.st_dev = new_encode_dev(stat->dev);
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tmp.st_ino = stat->ino;
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if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
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return -EOVERFLOW;
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tmp.st_mode = stat->mode;
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tmp.st_nlink = stat->nlink;
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SET_UID(tmp.st_uid, stat->uid);
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SET_GID(tmp.st_gid, stat->gid);
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tmp.st_rdev = new_encode_dev(stat->rdev);
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tmp.st_size = stat->size;
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tmp.st_atime = stat->atime.tv_sec;
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tmp.st_mtime = stat->mtime.tv_sec;
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tmp.st_ctime = stat->ctime.tv_sec;
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#ifdef STAT_HAVE_NSEC
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tmp.st_atime_nsec = stat->atime.tv_nsec;
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tmp.st_mtime_nsec = stat->mtime.tv_nsec;
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tmp.st_ctime_nsec = stat->ctime.tv_nsec;
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#endif
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tmp.st_blocks = stat->blocks;
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tmp.st_blksize = stat->blksize;
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return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
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}
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asmlinkage unsigned long
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sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
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unsigned long flags, unsigned long fd, unsigned long pgoff)
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{
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struct file * file = NULL;
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unsigned long error;
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error = -EINVAL;
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if (pgoff & (~PAGE_MASK >> 12))
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goto out;
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pgoff >>= PAGE_SHIFT-12;
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if (!(flags & MAP_ANONYMOUS)) {
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error = -EBADF;
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file = fget(fd);
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if (!file)
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goto out;
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}
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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down_write(¤t->mm->mmap_sem);
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error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
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up_write(¤t->mm->mmap_sem);
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if (file)
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fput(file);
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out:
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return error;
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}
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asmlinkage int sys_truncate64(const char __user *path, unsigned int high,
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unsigned int low)
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{
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if ((int)high < 0)
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return -EINVAL;
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return sys_truncate(path, ((long) high << 32) | low);
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}
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asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
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unsigned int low)
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{
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if ((int)high < 0)
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return -EINVAL;
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return sys_ftruncate(fd, ((long) high << 32) | low);
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}
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/*
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* sys_execve() executes a new program.
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*/
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asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
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{
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int error;
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char * filename;
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filename = getname(compat_ptr(regs.regs[4]));
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error = PTR_ERR(filename);
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if (IS_ERR(filename))
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goto out;
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error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
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compat_ptr(regs.regs[6]), ®s);
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putname(filename);
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out:
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return error;
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}
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#define RLIM_INFINITY32 0x7fffffff
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#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
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struct rlimit32 {
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int rlim_cur;
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int rlim_max;
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};
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#ifdef __MIPSEB__
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asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
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int length_hi, int length_lo)
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#endif
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#ifdef __MIPSEL__
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asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
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int length_lo, int length_hi)
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#endif
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{
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loff_t length;
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length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
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return sys_truncate(path, length);
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}
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#ifdef __MIPSEB__
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asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
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int length_hi, int length_lo)
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#endif
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#ifdef __MIPSEL__
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asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
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int length_lo, int length_hi)
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#endif
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{
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loff_t length;
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length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
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return sys_ftruncate(fd, length);
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}
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static inline long
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get_tv32(struct timeval *o, struct compat_timeval __user *i)
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{
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return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
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(__get_user(o->tv_sec, &i->tv_sec) |
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__get_user(o->tv_usec, &i->tv_usec)));
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}
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static inline long
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put_tv32(struct compat_timeval __user *o, struct timeval *i)
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{
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return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
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(__put_user(i->tv_sec, &o->tv_sec) |
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__put_user(i->tv_usec, &o->tv_usec)));
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}
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extern struct timezone sys_tz;
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asmlinkage int
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sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
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{
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if (tv) {
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struct timeval ktv;
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do_gettimeofday(&ktv);
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if (put_tv32(tv, &ktv))
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return -EFAULT;
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}
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if (tz) {
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if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
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return -EFAULT;
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}
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return 0;
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}
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static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
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{
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long usec;
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if (!access_ok(VERIFY_READ, i, sizeof(*i)))
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return -EFAULT;
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if (__get_user(o->tv_sec, &i->tv_sec))
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return -EFAULT;
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if (__get_user(usec, &i->tv_usec))
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return -EFAULT;
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o->tv_nsec = usec * 1000;
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return 0;
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}
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asmlinkage int
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sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
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{
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struct timespec kts;
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struct timezone ktz;
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if (tv) {
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if (get_ts32(&kts, tv))
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return -EFAULT;
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}
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if (tz) {
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if (copy_from_user(&ktz, tz, sizeof(ktz)))
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return -EFAULT;
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}
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return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
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}
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asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
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unsigned int offset_low, loff_t __user * result,
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unsigned int origin)
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{
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return sys_llseek(fd, offset_high, offset_low, result, origin);
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}
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/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
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lseek back to original location. They fail just like lseek does on
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non-seekable files. */
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asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
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size_t count, u32 unused, u64 a4, u64 a5)
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{
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return sys_pread64(fd, buf, count, merge_64(a4, a5));
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}
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asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
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size_t count, u32 unused, u64 a4, u64 a5)
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{
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return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
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}
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asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
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struct compat_timespec __user *interval)
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{
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struct timespec t;
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int ret;
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mm_segment_t old_fs = get_fs ();
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set_fs (KERNEL_DS);
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ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
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set_fs (old_fs);
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if (put_user (t.tv_sec, &interval->tv_sec) ||
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__put_user (t.tv_nsec, &interval->tv_nsec))
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return -EFAULT;
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return ret;
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}
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#ifdef CONFIG_SYSVIPC
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asmlinkage long
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sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)
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{
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int version, err;
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version = call >> 16; /* hack for backward compatibility */
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call &= 0xffff;
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switch (call) {
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case SEMOP:
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/* struct sembuf is the same on 32 and 64bit :)) */
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err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
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break;
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case SEMTIMEDOP:
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err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
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compat_ptr(fifth));
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break;
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case SEMGET:
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err = sys_semget(first, second, third);
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break;
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case SEMCTL:
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err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
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break;
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case MSGSND:
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err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
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break;
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case MSGRCV:
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err = compat_sys_msgrcv(first, second, fifth, third,
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version, compat_ptr(ptr));
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break;
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case MSGGET:
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err = sys_msgget((key_t) first, second);
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break;
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case MSGCTL:
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err = compat_sys_msgctl(first, second, compat_ptr(ptr));
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break;
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case SHMAT:
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err = compat_sys_shmat(first, second, third, version,
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compat_ptr(ptr));
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break;
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case SHMDT:
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err = sys_shmdt(compat_ptr(ptr));
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break;
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case SHMGET:
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err = sys_shmget(first, (unsigned)second, third);
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break;
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case SHMCTL:
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err = compat_sys_shmctl(first, second, compat_ptr(ptr));
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break;
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default:
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err = -EINVAL;
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break;
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}
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return err;
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}
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#else
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asmlinkage long
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sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_SYSVIPC */
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#ifdef CONFIG_MIPS32_N32
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asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)
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{
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/* compat_sys_semctl expects a pointer to union semun */
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u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
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if (put_user(arg, uptr))
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return -EFAULT;
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return compat_sys_semctl(semid, semnum, cmd, uptr);
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}
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asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)
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{
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return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
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}
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asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,
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int msgflg)
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{
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return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
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compat_ptr(msgp));
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}
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#endif
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|
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struct sysctl_args32
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{
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compat_caddr_t name;
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int nlen;
|
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compat_caddr_t oldval;
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compat_caddr_t oldlenp;
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compat_caddr_t newval;
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compat_size_t newlen;
|
|
unsigned int __unused[4];
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};
|
|
|
|
#ifdef CONFIG_SYSCTL_SYSCALL
|
|
|
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asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
|
|
{
|
|
struct sysctl_args32 tmp;
|
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int error;
|
|
size_t oldlen;
|
|
size_t __user *oldlenp = NULL;
|
|
unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
|
|
|
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if (copy_from_user(&tmp, args, sizeof(tmp)))
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return -EFAULT;
|
|
|
|
if (tmp.oldval && tmp.oldlenp) {
|
|
/* Duh, this is ugly and might not work if sysctl_args
|
|
is in read-only memory, but do_sysctl does indirectly
|
|
a lot of uaccess in both directions and we'd have to
|
|
basically copy the whole sysctl.c here, and
|
|
glibc's __sysctl uses rw memory for the structure
|
|
anyway. */
|
|
if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
|
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put_user(oldlen, (size_t __user *)addr))
|
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return -EFAULT;
|
|
oldlenp = (size_t __user *)addr;
|
|
}
|
|
|
|
lock_kernel();
|
|
error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
|
|
oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
|
|
unlock_kernel();
|
|
if (oldlenp) {
|
|
if (!error) {
|
|
if (get_user(oldlen, (size_t __user *)addr) ||
|
|
put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
|
|
error = -EFAULT;
|
|
}
|
|
copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
|
|
}
|
|
return error;
|
|
}
|
|
|
|
#endif /* CONFIG_SYSCTL_SYSCALL */
|
|
|
|
asmlinkage long sys32_newuname(struct new_utsname __user * name)
|
|
{
|
|
int ret = 0;
|
|
|
|
down_read(&uts_sem);
|
|
if (copy_to_user(name, utsname(), sizeof *name))
|
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ret = -EFAULT;
|
|
up_read(&uts_sem);
|
|
|
|
if (current->personality == PER_LINUX32 && !ret)
|
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if (copy_to_user(name->machine, "mips\0\0\0", 8))
|
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ret = -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage int sys32_personality(unsigned long personality)
|
|
{
|
|
int ret;
|
|
personality &= 0xffffffff;
|
|
if (personality(current->personality) == PER_LINUX32 &&
|
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personality == PER_LINUX)
|
|
personality = PER_LINUX32;
|
|
ret = sys_personality(personality);
|
|
if (ret == PER_LINUX32)
|
|
ret = PER_LINUX;
|
|
return ret;
|
|
}
|
|
|
|
/* ustat compatibility */
|
|
struct ustat32 {
|
|
compat_daddr_t f_tfree;
|
|
compat_ino_t f_tinode;
|
|
char f_fname[6];
|
|
char f_fpack[6];
|
|
};
|
|
|
|
extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
|
|
|
|
asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
|
|
{
|
|
int err;
|
|
struct ustat tmp;
|
|
struct ustat32 tmp32;
|
|
mm_segment_t old_fs = get_fs();
|
|
|
|
set_fs(KERNEL_DS);
|
|
err = sys_ustat(dev, (struct ustat __user *)&tmp);
|
|
set_fs (old_fs);
|
|
|
|
if (err)
|
|
goto out;
|
|
|
|
memset(&tmp32,0,sizeof(struct ustat32));
|
|
tmp32.f_tfree = tmp.f_tfree;
|
|
tmp32.f_tinode = tmp.f_tinode;
|
|
|
|
err = copy_to_user(ubuf32,&tmp32,sizeof(struct ustat32)) ? -EFAULT : 0;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
asmlinkage int sys32_sendfile(int out_fd, int 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);
|
|
}
|
|
|
|
save_static_function(sys32_clone);
|
|
__attribute_used__ noinline static int
|
|
_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);
|
|
}
|