2 * Implementation of various system calls for Linux/PowerPC
4 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6 * Derived from "arch/i386/kernel/sys_i386.c"
7 * Adapted from the i386 version by Gary Thomas
8 * Modified by Cort Dougan (cort@cs.nmt.edu)
9 * and Paul Mackerras (paulus@cs.anu.edu.au).
11 * This file contains various random system calls that
12 * have a non-standard calling sequence on the Linux/PPC
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
22 #include <linux/errno.h>
23 #include <linux/sched.h>
24 #include <linux/syscalls.h>
26 #include <linux/smp.h>
27 #include <linux/smp_lock.h>
28 #include <linux/sem.h>
29 #include <linux/msg.h>
30 #include <linux/shm.h>
31 #include <linux/stat.h>
32 #include <linux/mman.h>
33 #include <linux/sys.h>
34 #include <linux/ipc.h>
35 #include <linux/utsname.h>
36 #include <linux/file.h>
37 #include <linux/init.h>
38 #include <linux/personality.h>
39 #include <linux/vs_cvirt.h>
41 #include <asm/uaccess.h>
43 #include <asm/semaphore.h>
44 #include <asm/syscalls.h>
46 #include <asm/unistd.h>
49 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
51 * This is really horribly ugly.
53 int sys_ipc(uint call, int first, unsigned long second, long third,
54 void __user *ptr, long fifth)
58 version = call >> 16; /* hack for backward compatibility */
64 ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
65 (unsigned)second, NULL);
68 ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
70 (const struct timespec __user *) fifth);
73 ret = sys_semget (first, (int)second, third);
81 if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr)))
83 ret = sys_semctl(first, (int)second, third, fourth);
87 ret = sys_msgsnd(first, (struct msgbuf __user *)ptr,
88 (size_t)second, third);
93 struct ipc_kludge tmp;
98 if ((ret = copy_from_user(&tmp,
99 (struct ipc_kludge __user *) ptr,
100 sizeof (tmp)) ? -EFAULT : 0))
102 ret = sys_msgrcv(first, tmp.msgp, (size_t) second,
107 ret = sys_msgrcv (first, (struct msgbuf __user *) ptr,
108 (size_t)second, fifth, third);
113 ret = sys_msgget((key_t)first, (int)second);
116 ret = sys_msgctl(first, (int)second,
117 (struct msqid_ds __user *)ptr);
121 ret = do_shmat(first, (char __user *)ptr, (int)second, &raddr);
124 ret = put_user(raddr, (ulong __user *) third);
128 ret = sys_shmdt((char __user *)ptr);
131 ret = sys_shmget(first, (size_t)second, third);
134 ret = sys_shmctl(first, (int)second,
135 (struct shmid_ds __user *)ptr);
143 * sys_pipe() is the normal C calling standard for creating
144 * a pipe. It's not the way unix traditionally does this, though.
146 int sys_pipe(int __user *fildes)
153 if (copy_to_user(fildes, fd, 2*sizeof(int)))
159 static inline unsigned long do_mmap2(unsigned long addr, size_t len,
160 unsigned long prot, unsigned long flags,
161 unsigned long fd, unsigned long off, int shift)
163 struct file * file = NULL;
164 unsigned long ret = -EINVAL;
167 if (off & ((1 << shift) - 1))
173 if (!(flags & MAP_ANONYMOUS)) {
174 if (!(file = fget(fd)))
178 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
180 down_write(¤t->mm->mmap_sem);
181 ret = do_mmap_pgoff(file, addr, len, prot, flags, off);
182 up_write(¤t->mm->mmap_sem);
189 unsigned long sys_mmap2(unsigned long addr, size_t len,
190 unsigned long prot, unsigned long flags,
191 unsigned long fd, unsigned long pgoff)
193 return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
196 unsigned long sys_mmap(unsigned long addr, size_t len,
197 unsigned long prot, unsigned long flags,
198 unsigned long fd, off_t offset)
200 return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
205 * Due to some executables calling the wrong select we sometimes
206 * get wrong args. This determines how the args are being passed
207 * (a single ptr to them all args passed) then calls
208 * sys_select() with the appropriate args. -- Cort
211 ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
213 if ( (unsigned long)n >= 4096 )
215 unsigned long __user *buffer = (unsigned long __user *)n;
216 if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
217 || __get_user(n, buffer)
218 || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
219 || __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
220 || __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
221 || __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
224 return sys_select(n, inp, outp, exp, tvp);
229 long ppc64_personality(unsigned long personality)
233 if (personality(current->personality) == PER_LINUX32
234 && personality == PER_LINUX)
235 personality = PER_LINUX32;
236 ret = sys_personality(personality);
237 if (ret == PER_LINUX32)
244 #define OVERRIDE_MACHINE (personality(current->personality) == PER_LINUX32)
246 #define OVERRIDE_MACHINE 0
249 static inline int override_machine(char __user *mach)
251 if (OVERRIDE_MACHINE) {
252 /* change ppc64 to ppc */
253 if (__put_user(0, mach+3) || __put_user(0, mach+4))
259 long ppc_newuname(struct new_utsname __user * name)
264 if (copy_to_user(name, vx_new_utsname(), sizeof(*name)))
268 err = override_machine(name->machine);
272 int sys_uname(struct old_utsname __user *name)
277 if (copy_to_user(name, vx_new_utsname(), sizeof(*name)))
281 err = override_machine(name->machine);
285 int sys_olduname(struct oldold_utsname __user *name)
288 struct new_utsname *ptr;
290 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
294 ptr = vx_new_utsname();
295 error = __copy_to_user(&name->sysname, ptr->sysname, __OLD_UTS_LEN);
296 error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
297 error |= __copy_to_user(&name->nodename, ptr->nodename, __OLD_UTS_LEN);
298 error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
299 error |= __copy_to_user(&name->release, ptr->release, __OLD_UTS_LEN);
300 error |= __put_user(0, name->release + __OLD_UTS_LEN);
301 error |= __copy_to_user(&name->version, ptr->version, __OLD_UTS_LEN);
302 error |= __put_user(0, name->version + __OLD_UTS_LEN);
303 error |= __copy_to_user(&name->machine, ptr->machine, __OLD_UTS_LEN);
304 error |= override_machine(name->machine);
307 return error? -EFAULT: 0;
310 long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
311 u32 len_high, u32 len_low)
313 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
314 (u64)len_high << 32 | len_low, advice);
317 void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
318 unsigned long r6, unsigned long r7, unsigned long r8,
319 struct pt_regs *regs)
321 printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
322 " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,
323 current, smp_processor_id());
326 void do_show_syscall_exit(unsigned long r3)
328 printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());