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 37 asmlinkage 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 43 asmlinkage 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 50 asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv, 51 char __user *__user *envp, struct pt_regs *regs) 52 { 53 int error; 54 char *filename; 55 56 filename = getname(filenamei); 57 error = PTR_ERR(filename); 58 if (IS_ERR(filename)) 59 goto out; 60 error = do_execve(filename, argv, envp, regs); 61 putname(filename); 62 out: 63 return error; 64 } 65 66 asmlinkage long sys_mmap(unsigned long addr, unsigned long len, 67 unsigned long prot, unsigned long flags, 68 unsigned long fd, off_t pgoff) 69 { 70 if (pgoff & ~PAGE_MASK) 71 return -EINVAL; 72 73 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); 74 } 75 76 /* 77 * Do a system call from kernel instead of calling sys_execve so we 78 * end up with proper pt_regs. 79 */ 80 int kernel_execve(const char *filename, char *const argv[], char *const envp[]) 81 { 82 register const char *__a __asm__("r5") = filename; 83 register const void *__b __asm__("r6") = argv; 84 register const void *__c __asm__("r7") = envp; 85 register unsigned long __syscall __asm__("r12") = __NR_execve; 86 register unsigned long __ret __asm__("r3"); 87 __asm__ __volatile__ ("brki r14, 0x8" 88 : "=r" (__ret), "=r" (__syscall) 89 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) 90 : "r4", "r8", "r9", 91 "r10", "r11", "r14", "cc", "memory"); 92 return __ret; 93 } 94