mirror of https://gitee.com/openkylin/linux.git
589 lines
16 KiB
C
589 lines
16 KiB
C
/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
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*
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* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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* Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
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*
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* These routines maintain argument size conversion between 32bit and 64bit
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* environment.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/capability.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/file.h>
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#include <linux/signal.h>
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#include <linux/resource.h>
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#include <linux/times.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/slab.h>
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#include <linux/uio.h>
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#include <linux/nfs_fs.h>
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#include <linux/quota.h>
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/personality.h>
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#include <linux/stat.h>
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#include <linux/filter.h>
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#include <linux/highmem.h>
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#include <linux/highuid.h>
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#include <linux/mman.h>
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#include <linux/ipv6.h>
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#include <linux/in.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/binfmts.h>
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#include <linux/dnotify.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 <linux/netfilter_ipv4/ip_tables.h>
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#include <linux/ptrace.h>
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#include <asm/types.h>
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#include <asm/uaccess.h>
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#include <asm/fpumacro.h>
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#include <asm/mmu_context.h>
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#include <asm/compat_signal.h>
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#ifdef CONFIG_SYSVIPC
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asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
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{
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int version;
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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 SEMTIMEDOP:
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if (fifth)
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/* sign extend semid */
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return compat_sys_semtimedop((int)first,
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compat_ptr(ptr), second,
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compat_ptr(fifth));
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/* else fall through for normal semop() */
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case SEMOP:
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/* struct sembuf is the same on 32 and 64bit :)) */
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/* sign extend semid */
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return sys_semtimedop((int)first, compat_ptr(ptr), second,
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NULL);
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case SEMGET:
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/* sign extend key, nsems */
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return sys_semget((int)first, (int)second, third);
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case SEMCTL:
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/* sign extend semid, semnum */
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return compat_sys_semctl((int)first, (int)second, third,
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compat_ptr(ptr));
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case MSGSND:
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/* sign extend msqid */
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return compat_sys_msgsnd((int)first, (int)second, third,
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compat_ptr(ptr));
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case MSGRCV:
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/* sign extend msqid, msgtyp */
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return compat_sys_msgrcv((int)first, second, (int)fifth,
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third, version, compat_ptr(ptr));
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case MSGGET:
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/* sign extend key */
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return sys_msgget((int)first, second);
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case MSGCTL:
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/* sign extend msqid */
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return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
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case SHMAT:
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/* sign extend shmid */
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return compat_sys_shmat((int)first, second, third, version,
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compat_ptr(ptr));
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case SHMDT:
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return sys_shmdt(compat_ptr(ptr));
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case SHMGET:
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/* sign extend key_t */
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return sys_shmget((int)first, second, third);
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case SHMCTL:
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/* sign extend shmid */
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return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
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default:
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return -ENOSYS;
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};
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return -ENOSYS;
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}
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#endif
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asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
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{
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if ((int)high < 0)
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return -EINVAL;
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else
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return sys_truncate(path, (high << 32) | low);
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}
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asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
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{
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if ((int)high < 0)
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return -EINVAL;
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else
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return sys_ftruncate(fd, (high << 32) | low);
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}
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static int cp_compat_stat64(struct kstat *stat,
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struct compat_stat64 __user *statbuf)
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{
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int err;
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err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
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err |= put_user(stat->ino, &statbuf->st_ino);
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err |= put_user(stat->mode, &statbuf->st_mode);
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err |= put_user(stat->nlink, &statbuf->st_nlink);
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err |= put_user(stat->uid, &statbuf->st_uid);
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err |= put_user(stat->gid, &statbuf->st_gid);
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err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
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err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
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err |= put_user(stat->size, &statbuf->st_size);
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err |= put_user(stat->blksize, &statbuf->st_blksize);
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err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
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err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
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err |= put_user(stat->blocks, &statbuf->st_blocks);
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err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
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err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
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err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
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err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
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err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
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err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
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err |= put_user(0, &statbuf->__unused4);
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err |= put_user(0, &statbuf->__unused5);
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return err;
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}
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asmlinkage long compat_sys_stat64(char __user * filename,
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struct compat_stat64 __user *statbuf)
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{
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struct kstat stat;
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int error = vfs_stat(filename, &stat);
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if (!error)
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error = cp_compat_stat64(&stat, statbuf);
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return error;
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}
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asmlinkage long compat_sys_lstat64(char __user * filename,
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struct compat_stat64 __user *statbuf)
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{
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struct kstat stat;
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int error = vfs_lstat(filename, &stat);
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if (!error)
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error = cp_compat_stat64(&stat, statbuf);
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return error;
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}
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asmlinkage long compat_sys_fstat64(unsigned int fd,
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struct compat_stat64 __user * statbuf)
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{
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struct kstat stat;
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int error = vfs_fstat(fd, &stat);
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if (!error)
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error = cp_compat_stat64(&stat, statbuf);
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return error;
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}
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asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
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struct compat_stat64 __user * statbuf, int flag)
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{
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struct kstat stat;
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int error;
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error = vfs_fstatat(dfd, filename, &stat, flag);
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if (error)
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return error;
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return cp_compat_stat64(&stat, statbuf);
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}
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asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
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{
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return sys_sysfs(option, arg1, arg2);
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}
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asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, 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_compat_timespec(&t, interval))
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return -EFAULT;
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return ret;
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}
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asmlinkage long compat_sys_rt_sigprocmask(int how,
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compat_sigset_t __user *set,
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compat_sigset_t __user *oset,
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compat_size_t sigsetsize)
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{
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sigset_t s;
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compat_sigset_t s32;
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int ret;
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mm_segment_t old_fs = get_fs();
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if (set) {
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if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
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return -EFAULT;
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switch (_NSIG_WORDS) {
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case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
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case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
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case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
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case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
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}
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}
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set_fs (KERNEL_DS);
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ret = sys_rt_sigprocmask(how,
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set ? (sigset_t __user *) &s : NULL,
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oset ? (sigset_t __user *) &s : NULL,
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sigsetsize);
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set_fs (old_fs);
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if (ret) return ret;
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if (oset) {
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switch (_NSIG_WORDS) {
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case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
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case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
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case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
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case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
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}
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if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
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return -EFAULT;
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}
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return 0;
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}
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asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
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compat_size_t sigsetsize)
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{
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sigset_t s;
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compat_sigset_t s32;
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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_rt_sigpending((sigset_t __user *) &s, sigsetsize);
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set_fs (old_fs);
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if (!ret) {
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switch (_NSIG_WORDS) {
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case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
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case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
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case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
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case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
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}
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if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
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return -EFAULT;
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}
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return ret;
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}
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asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
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struct compat_siginfo __user *uinfo)
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{
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siginfo_t info;
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int ret;
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mm_segment_t old_fs = get_fs();
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if (copy_siginfo_from_user32(&info, uinfo))
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return -EFAULT;
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set_fs (KERNEL_DS);
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ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
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set_fs (old_fs);
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return ret;
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}
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asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
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struct old_sigaction32 __user *oact)
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{
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struct k_sigaction new_ka, old_ka;
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int ret;
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WARN_ON_ONCE(sig >= 0);
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sig = -sig;
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if (act) {
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compat_old_sigset_t mask;
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u32 u_handler, u_restorer;
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ret = get_user(u_handler, &act->sa_handler);
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new_ka.sa.sa_handler = compat_ptr(u_handler);
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ret |= __get_user(u_restorer, &act->sa_restorer);
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new_ka.sa.sa_restorer = compat_ptr(u_restorer);
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ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
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ret |= __get_user(mask, &act->sa_mask);
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if (ret)
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return ret;
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new_ka.ka_restorer = NULL;
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siginitset(&new_ka.sa.sa_mask, mask);
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}
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ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
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if (!ret && oact) {
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ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
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ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
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ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
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ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
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}
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return ret;
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}
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asmlinkage long compat_sys_rt_sigaction(int sig,
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struct sigaction32 __user *act,
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struct sigaction32 __user *oact,
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void __user *restorer,
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compat_size_t sigsetsize)
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{
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struct k_sigaction new_ka, old_ka;
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int ret;
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compat_sigset_t set32;
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/* XXX: Don't preclude handling different sized sigset_t's. */
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if (sigsetsize != sizeof(compat_sigset_t))
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return -EINVAL;
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if (act) {
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u32 u_handler, u_restorer;
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new_ka.ka_restorer = restorer;
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ret = get_user(u_handler, &act->sa_handler);
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new_ka.sa.sa_handler = compat_ptr(u_handler);
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ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
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switch (_NSIG_WORDS) {
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case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
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case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
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case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
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case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
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}
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ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
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ret |= __get_user(u_restorer, &act->sa_restorer);
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new_ka.sa.sa_restorer = compat_ptr(u_restorer);
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if (ret)
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return -EFAULT;
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}
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ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
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if (!ret && oact) {
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switch (_NSIG_WORDS) {
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case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
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case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
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case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
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case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
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}
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ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
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ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
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ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
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ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
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if (ret)
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ret = -EFAULT;
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}
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return ret;
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}
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/*
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* sparc32_execve() executes a new program after the asm stub has set
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* things up for us. This should basically do what I want it to.
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*/
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asmlinkage long sparc32_execve(struct pt_regs *regs)
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{
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int error, base = 0;
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char *filename;
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/* User register window flush is done by entry.S */
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/* Check for indirect call. */
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if ((u32)regs->u_regs[UREG_G1] == 0)
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base = 1;
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filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
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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,
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compat_ptr(regs->u_regs[base + UREG_I1]),
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compat_ptr(regs->u_regs[base + UREG_I2]), regs);
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putname(filename);
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if (!error) {
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fprs_write(0);
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current_thread_info()->xfsr[0] = 0;
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current_thread_info()->fpsaved[0] = 0;
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regs->tstate &= ~TSTATE_PEF;
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}
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out:
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return error;
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}
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#ifdef CONFIG_MODULES
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asmlinkage long sys32_init_module(void __user *umod, u32 len,
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const char __user *uargs)
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{
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return sys_init_module(umod, len, uargs);
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}
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asmlinkage long sys32_delete_module(const char __user *name_user,
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unsigned int flags)
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{
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return sys_delete_module(name_user, flags);
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}
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#else /* CONFIG_MODULES */
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asmlinkage long sys32_init_module(const char __user *name_user,
|
|
struct module __user *mod_user)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
asmlinkage long sys32_delete_module(const char __user *name_user)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
#endif /* CONFIG_MODULES */
|
|
|
|
asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
|
|
char __user *ubuf,
|
|
compat_size_t count,
|
|
unsigned long poshi,
|
|
unsigned long poslo)
|
|
{
|
|
return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
|
|
}
|
|
|
|
asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
|
|
char __user *ubuf,
|
|
compat_size_t count,
|
|
unsigned long poshi,
|
|
unsigned long poslo)
|
|
{
|
|
return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
|
|
}
|
|
|
|
asmlinkage long compat_sys_readahead(int fd,
|
|
unsigned long offhi,
|
|
unsigned long offlo,
|
|
compat_size_t count)
|
|
{
|
|
return sys_readahead(fd, (offhi << 32) | offlo, count);
|
|
}
|
|
|
|
long compat_sys_fadvise64(int fd,
|
|
unsigned long offhi,
|
|
unsigned long offlo,
|
|
compat_size_t len, int advice)
|
|
{
|
|
return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
|
|
}
|
|
|
|
long compat_sys_fadvise64_64(int fd,
|
|
unsigned long offhi, unsigned long offlo,
|
|
unsigned long lenhi, unsigned long lenlo,
|
|
int advice)
|
|
{
|
|
return sys_fadvise64_64(fd,
|
|
(offhi << 32) | offlo,
|
|
(lenhi << 32) | lenlo,
|
|
advice);
|
|
}
|
|
|
|
asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
|
|
compat_off_t __user *offset,
|
|
compat_size_t 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 long compat_sys_sendfile64(int out_fd, int in_fd,
|
|
compat_loff_t __user *offset,
|
|
compat_size_t count)
|
|
{
|
|
mm_segment_t old_fs = get_fs();
|
|
int ret;
|
|
loff_t lof;
|
|
|
|
if (offset && get_user(lof, offset))
|
|
return -EFAULT;
|
|
|
|
set_fs(KERNEL_DS);
|
|
ret = sys_sendfile64(out_fd, in_fd,
|
|
offset ? (loff_t __user *) &lof : NULL,
|
|
count);
|
|
set_fs(old_fs);
|
|
|
|
if (offset && put_user(lof, offset))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* This is just a version for 32-bit applications which does
|
|
* not force O_LARGEFILE on.
|
|
*/
|
|
|
|
asmlinkage long sparc32_open(const char __user *filename,
|
|
int flags, int mode)
|
|
{
|
|
return do_sys_open(AT_FDCWD, filename, flags, mode);
|
|
}
|
|
|
|
long sys32_lookup_dcookie(unsigned long cookie_high,
|
|
unsigned long cookie_low,
|
|
char __user *buf, size_t len)
|
|
{
|
|
return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
|
|
buf, len);
|
|
}
|
|
|
|
long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
|
|
{
|
|
return sys_sync_file_range(fd,
|
|
(off_high << 32) | off_low,
|
|
(nb_high << 32) | nb_low,
|
|
flags);
|
|
}
|
|
|
|
asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
|
|
u32 lenhi, u32 lenlo)
|
|
{
|
|
return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
|
|
((loff_t)lenhi << 32) | lenlo);
|
|
}
|