blob: cd9be9aa016d184da98d24cd5dbb2f04c48dce50 [file] [log] [blame]
Paul Mackerras30286ef2005-10-17 20:10:13 +10001/*
2 * Implementation of various system calls for Linux/PowerPC
3 *
4 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
5 *
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).
10 *
11 * This file contains various random system calls that
12 * have a non-standard calling sequence on the Linux/PPC
13 * platform.
14 *
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.
19 *
20 */
21
22#include <linux/errno.h>
23#include <linux/sched.h>
24#include <linux/syscalls.h>
25#include <linux/mm.h>
Alexey Dobriyan4e950f62007-07-30 02:36:13 +040026#include <linux/fs.h>
Paul Mackerras30286ef2005-10-17 20:10:13 +100027#include <linux/smp.h>
Paul Mackerras30286ef2005-10-17 20:10:13 +100028#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>
Paul Mackerras30286ef2005-10-17 20:10:13 +100037#include <linux/personality.h>
38
39#include <asm/uaccess.h>
Arnd Bergmanna7f31842006-03-23 00:00:08 +010040#include <asm/syscalls.h>
Paul Mackerras30286ef2005-10-17 20:10:13 +100041#include <asm/time.h>
42#include <asm/unistd.h>
43
Paul Mackerras30286ef2005-10-17 20:10:13 +100044static inline unsigned long do_mmap2(unsigned long addr, size_t len,
45 unsigned long prot, unsigned long flags,
46 unsigned long fd, unsigned long off, int shift)
47{
Michael Ellerman05d84682005-10-21 16:01:34 +100048 unsigned long ret = -EINVAL;
Paul Mackerras30286ef2005-10-17 20:10:13 +100049
Dave Kleikampef3d3242008-07-08 00:28:54 +100050 if (!arch_validate_prot(prot))
51 goto out;
52
Paul Mackerras30286ef2005-10-17 20:10:13 +100053 if (shift) {
54 if (off & ((1 << shift) - 1))
55 goto out;
56 off >>= shift;
57 }
Paul Mackerras30286ef2005-10-17 20:10:13 +100058
Al Virof8b72562009-11-30 17:37:04 -050059 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off);
Paul Mackerras30286ef2005-10-17 20:10:13 +100060out:
61 return ret;
62}
63
64unsigned long sys_mmap2(unsigned long addr, size_t len,
65 unsigned long prot, unsigned long flags,
66 unsigned long fd, unsigned long pgoff)
67{
68 return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
69}
70
71unsigned long sys_mmap(unsigned long addr, size_t len,
72 unsigned long prot, unsigned long flags,
73 unsigned long fd, off_t offset)
74{
75 return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
76}
77
78#ifdef CONFIG_PPC32
79/*
80 * Due to some executables calling the wrong select we sometimes
81 * get wrong args. This determines how the args are being passed
82 * (a single ptr to them all args passed) then calls
83 * sys_select() with the appropriate args. -- Cort
84 */
85int
86ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
87{
88 if ( (unsigned long)n >= 4096 )
89 {
90 unsigned long __user *buffer = (unsigned long __user *)n;
91 if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
92 || __get_user(n, buffer)
93 || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
94 || __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
95 || __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
96 || __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
97 return -EFAULT;
98 }
99 return sys_select(n, inp, outp, exp, tvp);
100}
101#endif
102
103#ifdef CONFIG_PPC64
104long ppc64_personality(unsigned long personality)
105{
106 long ret;
107
108 if (personality(current->personality) == PER_LINUX32
Jiri Kosina7256a5d2012-08-13 03:18:28 +0000109 && personality(personality) == PER_LINUX)
110 personality = (personality & ~PER_MASK) | PER_LINUX32;
Paul Mackerras30286ef2005-10-17 20:10:13 +1000111 ret = sys_personality(personality);
Jiri Kosina7256a5d2012-08-13 03:18:28 +0000112 if (personality(ret) == PER_LINUX32)
113 ret = (ret & ~PER_MASK) | PER_LINUX;
Paul Mackerras30286ef2005-10-17 20:10:13 +1000114 return ret;
115}
116#endif
117
Paul Mackerras77f543c2005-10-18 14:19:41 +1000118long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
119 u32 len_high, u32 len_low)
120{
121 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
122 (u64)len_high << 32 | len_low, advice);
123}
124
Paul Mackerras30286ef2005-10-17 20:10:13 +1000125void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
126 unsigned long r6, unsigned long r7, unsigned long r8,
127 struct pt_regs *regs)
128{
129 printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
130 " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,
131 current, smp_processor_id());
132}
133
134void do_show_syscall_exit(unsigned long r3)
135{
136 printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());
137}