/* *  Implementation of various system calls for Linux/PowerPC * *    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/fs.h>#include <linux/smp.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/syscalls.h>#include <asm/time.h>#include <asm/unistd.h> static inline unsigned long do_mmap2(unsigned long addr, size_t len,			unsigned long prot, unsigned long flags,			unsigned long fd, unsigned long off, int shift){	unsigned long ret = -EINVAL; 	if (!arch_validate_prot(prot))		goto out; 	if (shift) {		if (off & ((1 << shift) - 1))			goto out;		off >>= shift;	} 	ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off);out:	return ret;} unsigned long sys_mmap2(unsigned long addr, size_t len,			unsigned long prot, unsigned long flags,			unsigned long fd, unsigned long pgoff){	return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);} unsigned long sys_mmap(unsigned long addr, size_t len,		       unsigned long prot, unsigned long flags,		       unsigned long fd, off_t offset){	return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);} #ifdef CONFIG_PPC32/* * Due to some executables calling the wrong select we sometimes * get wrong args.  This determines how the args are being passed * (a single ptr to them all args passed) then calls * sys_select() with the appropriate args. -- Cort */intppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp){	if ( (unsigned long)n >= 4096 )	{		unsigned long __user *buffer = (unsigned long __user *)n;		if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))		    || __get_user(n, buffer)		    || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))		    || __get_user(outp, ((fd_set  __user * __user *)(buffer+2)))		    || __get_user(exp, ((fd_set  __user * __user *)(buffer+3)))		    || __get_user(tvp, ((struct timeval  __user * __user *)(buffer+4))))			return -EFAULT;	}	return sys_select(n, inp, outp, exp, tvp);}#endif #ifdef CONFIG_PPC64long ppc64_personality(unsigned long personality){	long ret; 	if (personality(current->personality) == PER_LINUX32	    && personality(personality) == PER_LINUX)		personality = (personality & ~PER_MASK) | PER_LINUX32;	ret = sys_personality(personality);	if (personality(ret) == PER_LINUX32)		ret = (ret & ~PER_MASK) | PER_LINUX;	return ret;}#endif long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,		      u32 len_high, u32 len_low){	return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,			     (u64)len_high << 32 | len_low, advice);} 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());}