1/* 2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> 3 * Copyright (C) 2007-2009 PetaLogix 4 * Copyright (C) 2007 John Williams <john.williams@petalogix.com> 5 * 6 * Copyright (C) 2006 Atmark Techno, Inc. 7 * Yasushi SHOJI <yashi@atmark-techno.com> 8 * Tetsuya OHKAWA <tetsuya@atmark-techno.com> 9 * 10 * This file is subject to the terms and conditions of the GNU General Public 11 * License. See the file "COPYING" in the main directory of this archive 12 * for more details. 13 */ 14 15#include <linux/errno.h> 16#include <linux/mm.h> 17#include <linux/smp.h> 18#include <linux/syscalls.h> 19#include <linux/sem.h> 20#include <linux/msg.h> 21#include <linux/shm.h> 22#include <linux/stat.h> 23#include <linux/mman.h> 24#include <linux/sys.h> 25#include <linux/ipc.h> 26#include <linux/file.h> 27#include <linux/module.h> 28#include <linux/err.h> 29#include <linux/fs.h> 30#include <linux/semaphore.h> 31#include <linux/uaccess.h> 32#include <linux/unistd.h> 33#include <linux/slab.h> 34 35#include <asm/syscalls.h> 36 37asmlinkage long microblaze_vfork(struct pt_regs *regs) 38{ 39 return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1, 40 regs, 0, NULL, NULL); 41} 42 43asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs) 44{ 45 if (!stack) 46 stack = regs->r1; 47 return do_fork(flags, stack, regs, 0, NULL, NULL); 48} 49 50asmlinkage long microblaze_execve(const char __user *filenamei, 51 const char __user *const __user *argv, 52 const char __user *const __user *envp, 53 struct pt_regs *regs) 54{ 55 int error; 56 char *filename; 57 58 filename = getname(filenamei); 59 error = PTR_ERR(filename); 60 if (IS_ERR(filename)) 61 goto out; 62 error = do_execve(filename, argv, envp, regs); 63 putname(filename); 64out: 65 return error; 66} 67 68asmlinkage long sys_mmap(unsigned long addr, unsigned long len, 69 unsigned long prot, unsigned long flags, 70 unsigned long fd, off_t pgoff) 71{ 72 if (pgoff & ~PAGE_MASK) 73 return -EINVAL; 74 75 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); 76} 77 78/* 79 * Do a system call from kernel instead of calling sys_execve so we 80 * end up with proper pt_regs. 81 */ 82int kernel_execve(const char *filename, 83 const char *const argv[], 84 const char *const envp[]) 85{ 86 register const char *__a __asm__("r5") = filename; 87 register const void *__b __asm__("r6") = argv; 88 register const void *__c __asm__("r7") = envp; 89 register unsigned long __syscall __asm__("r12") = __NR_execve; 90 register unsigned long __ret __asm__("r3"); 91 __asm__ __volatile__ ("brki r14, 0x8" 92 : "=r" (__ret), "=r" (__syscall) 93 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) 94 : "r4", "r8", "r9", 95 "r10", "r11", "r14", "cc", "memory"); 96 return __ret; 97} 98