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 34 #include <asm/syscalls.h> 35 36 asmlinkage long microblaze_vfork(struct pt_regs *regs) 37 { 38 return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1, 39 regs, 0, NULL, NULL); 40 } 41 42 asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs) 43 { 44 if (!stack) 45 stack = regs->r1; 46 return do_fork(flags, stack, regs, 0, NULL, NULL); 47 } 48 49 asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv, 50 char __user *__user *envp, struct pt_regs *regs) 51 { 52 int error; 53 char *filename; 54 55 filename = getname(filenamei); 56 error = PTR_ERR(filename); 57 if (IS_ERR(filename)) 58 goto out; 59 error = do_execve(filename, argv, envp, regs); 60 putname(filename); 61 out: 62 return error; 63 } 64 65 asmlinkage long sys_mmap(unsigned long addr, unsigned long len, 66 unsigned long prot, unsigned long flags, 67 unsigned long fd, off_t pgoff) 68 { 69 if (pgoff & ~PAGE_MASK) 70 return -EINVAL; 71 72 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); 73 } 74 75 /* 76 * Do a system call from kernel instead of calling sys_execve so we 77 * end up with proper pt_regs. 78 */ 79 int kernel_execve(const char *filename, char *const argv[], char *const envp[]) 80 { 81 register const char *__a __asm__("r5") = filename; 82 register const void *__b __asm__("r6") = argv; 83 register const void *__c __asm__("r7") = envp; 84 register unsigned long __syscall __asm__("r12") = __NR_execve; 85 register unsigned long __ret __asm__("r3"); 86 __asm__ __volatile__ ("brki r14, 0x8" 87 : "=r" (__ret), "=r" (__syscall) 88 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) 89 : "r4", "r8", "r9", 90 "r10", "r11", "r14", "cc", "memory"); 91 return __ret; 92 } 93