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>
27 #include <linux/smp.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>
40 #include <asm/uaccess.h>
41 #include <asm/syscalls.h>
43 #include <asm/unistd.h>
45 static inline unsigned long do_mmap2(unsigned long addr, size_t len,
46 unsigned long prot, unsigned long flags,
47 unsigned long fd, unsigned long off, int shift)
49 unsigned long ret = -EINVAL;
51 if (!arch_validate_prot(prot))
55 if (off & ((1 << shift) - 1))
60 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off);
65 unsigned long sys_mmap2(unsigned long addr, size_t len,
66 unsigned long prot, unsigned long flags,
67 unsigned long fd, unsigned long pgoff)
69 return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
72 unsigned long sys_mmap(unsigned long addr, size_t len,
73 unsigned long prot, unsigned long flags,
74 unsigned long fd, off_t offset)
76 return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
81 * Due to some executables calling the wrong select we sometimes
82 * get wrong args. This determines how the args are being passed
83 * (a single ptr to them all args passed) then calls
84 * sys_select() with the appropriate args. -- Cort
87 ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
89 if ( (unsigned long)n >= 4096 )
91 unsigned long __user *buffer = (unsigned long __user *)n;
92 if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
93 || __get_user(n, buffer)
94 || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
95 || __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
96 || __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
97 || __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
100 return sys_select(n, inp, outp, exp, tvp);
105 long ppc64_personality(unsigned long personality)
109 if (personality(current->personality) == PER_LINUX32
110 && personality == PER_LINUX)
111 personality = PER_LINUX32;
112 ret = sys_personality(personality);
113 if (ret == PER_LINUX32)
120 #define OVERRIDE_MACHINE (personality(current->personality) == PER_LINUX32)
122 #define OVERRIDE_MACHINE 0
125 static inline int override_machine(char __user *mach)
127 if (OVERRIDE_MACHINE) {
128 /* change ppc64 to ppc */
129 if (__put_user(0, mach+3) || __put_user(0, mach+4))
135 long ppc_newuname(struct new_utsname __user * name)
140 if (copy_to_user(name, utsname(), sizeof(*name)))
144 err = override_machine(name->machine);
148 int sys_uname(struct old_utsname __user *name)
153 if (copy_to_user(name, utsname(), sizeof(*name)))
157 err = override_machine(name->machine);
161 int sys_olduname(struct oldold_utsname __user *name)
165 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
169 error = __copy_to_user(&name->sysname, &utsname()->sysname,
171 error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
172 error |= __copy_to_user(&name->nodename, &utsname()->nodename,
174 error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
175 error |= __copy_to_user(&name->release, &utsname()->release,
177 error |= __put_user(0, name->release + __OLD_UTS_LEN);
178 error |= __copy_to_user(&name->version, &utsname()->version,
180 error |= __put_user(0, name->version + __OLD_UTS_LEN);
181 error |= __copy_to_user(&name->machine, &utsname()->machine,
183 error |= override_machine(name->machine);
186 return error? -EFAULT: 0;
189 long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
190 u32 len_high, u32 len_low)
192 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
193 (u64)len_high << 32 | len_low, advice);
196 void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
197 unsigned long r6, unsigned long r7, unsigned long r8,
198 struct pt_regs *regs)
200 printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
201 " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,
202 current, smp_processor_id());
205 void do_show_syscall_exit(unsigned long r3)
207 printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());