diff options
Diffstat (limited to 'arch/ppc64/kernel/syscalls.c')
| -rw-r--r-- | arch/ppc64/kernel/syscalls.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/syscalls.c b/arch/ppc64/kernel/syscalls.c new file mode 100644 index 00000000000..f2865ff8d2f --- /dev/null +++ b/arch/ppc64/kernel/syscalls.c @@ -0,0 +1,258 @@ +/* + * linux/arch/ppc64/kernel/sys_ppc.c + * + * PowerPC version + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * + * Derived from "arch/i386/kernel/sys_i386.c" + * Adapted from the i386 version by Gary Thomas + * Modified by Cort Dougan (cort@cs.nmt.edu) + * and Paul Mackerras (paulus@cs.anu.edu.au). + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/PPC + * platform. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/syscalls.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/stat.h> +#include <linux/mman.h> +#include <linux/sys.h> +#include <linux/ipc.h> +#include <linux/utsname.h> +#include <linux/file.h> +#include <linux/init.h> +#include <linux/personality.h> + +#include <asm/uaccess.h> +#include <asm/ipc.h> +#include <asm/semaphore.h> +#include <asm/time.h> +#include <asm/unistd.h> + +extern unsigned long wall_jiffies; + +void +check_bugs(void) +{ +} + +/* + * sys_ipc() is the de-multiplexer for the SysV IPC calls.. + * + * This is really horribly ugly. + */ +asmlinkage int +sys_ipc (uint call, int first, unsigned long second, long third, + void __user *ptr, long fifth) +{ + int version, ret; + + version = call >> 16; /* hack for backward compatibility */ + call &= 0xffff; + + ret = -ENOSYS; + switch (call) { + case SEMOP: + ret = sys_semtimedop(first, (struct sembuf __user *)ptr, + (unsigned)second, NULL); + break; + case SEMTIMEDOP: + ret = sys_semtimedop(first, (struct sembuf __user *)ptr, + (unsigned)second, + (const struct timespec __user *) fifth); + break; + case SEMGET: + ret = sys_semget (first, (int)second, third); + break; + case SEMCTL: { + union semun fourth; + + ret = -EINVAL; + if (!ptr) + break; + if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr))) + break; + ret = sys_semctl(first, (int)second, third, fourth); + break; + } + case MSGSND: + ret = sys_msgsnd(first, (struct msgbuf __user *)ptr, + (size_t)second, third); + break; + case MSGRCV: + switch (version) { + case 0: { + struct ipc_kludge tmp; + + ret = -EINVAL; + if (!ptr) + break; + if ((ret = copy_from_user(&tmp, + (struct ipc_kludge __user *) ptr, + sizeof (tmp)) ? -EFAULT : 0)) + break; + ret = sys_msgrcv(first, tmp.msgp, (size_t) second, + tmp.msgtyp, third); + break; + } + default: + ret = sys_msgrcv (first, (struct msgbuf __user *) ptr, + (size_t)second, fifth, third); + break; + } + break; + case MSGGET: + ret = sys_msgget ((key_t)first, (int)second); + break; + case MSGCTL: + ret = sys_msgctl(first, (int)second, + (struct msqid_ds __user *)ptr); + break; + case SHMAT: + switch (version) { + default: { + ulong raddr; + ret = do_shmat(first, (char __user *) ptr, + (int)second, &raddr); + if (ret) + break; + ret = put_user (raddr, (ulong __user *) third); + break; + } + case 1: /* iBCS2 emulator entry point */ + ret = -EINVAL; + if (!segment_eq(get_fs(), get_ds())) + break; + ret = do_shmat(first, (char __user *)ptr, + (int)second, (ulong *)third); + break; + } + break; + case SHMDT: + ret = sys_shmdt ((char __user *)ptr); + break; + case SHMGET: + ret = sys_shmget (first, (size_t)second, third); + break; + case SHMCTL: + ret = sys_shmctl(first, (int)second, + (struct shmid_ds __user *)ptr); + break; + } + + return ret; +} + +/* + * sys_pipe() is the normal C calling standard for creating + * a pipe. It's not the way unix traditionally does this, though. + */ +asmlinkage int sys_pipe(int __user *fildes) +{ + int fd[2]; + int error; + + error = do_pipe(fd); + if (!error) { + if (copy_to_user(fildes, fd, 2*sizeof(int))) + error = -EFAULT; + } + + return error; +} + +unsigned long sys_mmap(unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, off_t offset) +{ + struct file * file = NULL; + unsigned long ret = -EBADF; + + if (!(flags & MAP_ANONYMOUS)) { + if (!(file = fget(fd))) + goto out; + } + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + down_write(¤t->mm->mmap_sem); + ret = do_mmap(file, addr, len, prot, flags, offset); + up_write(¤t->mm->mmap_sem); + if (file) + fput(file); + +out: + return ret; +} + +static int __init set_fakeppc(char *str) +{ + if (*str) + return 0; + init_task.personality = PER_LINUX32; + return 1; +} +__setup("fakeppc", set_fakeppc); + +asmlinkage int sys_uname(struct old_utsname __user * name) +{ + int err = -EFAULT; + + down_read(&uts_sem); + if (name && !copy_to_user(name, &system_utsname, sizeof (*name))) + err = 0; + up_read(&uts_sem); + + return err; +} + +asmlinkage time_t sys64_time(time_t __user * tloc) +{ + time_t secs; + time_t usecs; + + long tb_delta = tb_ticks_since(tb_last_stamp); + tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy; + + secs = xtime.tv_sec; + usecs = (xtime.tv_nsec/1000) + tb_delta / tb_ticks_per_usec; + while (usecs >= USEC_PER_SEC) { + ++secs; + usecs -= USEC_PER_SEC; + } + + if (tloc) { + if (put_user(secs,tloc)) + secs = -EFAULT; + } + + return secs; +} + +void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, unsigned long r8, + struct pt_regs *regs) +{ + printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p" + " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs, + current, smp_processor_id()); +} + +void do_show_syscall_exit(unsigned long r3) +{ + printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id()); +} |