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, 44 struct pt_regs *regs) 45 { 46 if (!stack) 47 stack = regs->r1; 48 return do_fork(flags, stack, regs, 0, NULL, NULL); 49 } 50 51 asmlinkage long microblaze_execve(const char __user *filenamei, 52 const char __user *const __user *argv, 53 const char __user *const __user *envp, 54 struct pt_regs *regs) 55 { 56 int error; 57 char *filename; 58 59 filename = getname(filenamei); 60 error = PTR_ERR(filename); 61 if (IS_ERR(filename)) 62 goto out; 63 error = do_execve(filename, argv, envp, regs); 64 putname(filename); 65 out: 66 return error; 67 } 68 69 asmlinkage long sys_mmap(unsigned long addr, unsigned long len, 70 unsigned long prot, unsigned long flags, 71 unsigned long fd, off_t pgoff) 72 { 73 if (pgoff & ~PAGE_MASK) 74 return -EINVAL; 75 76 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); 77 } 78 79 /* 80 * Do a system call from kernel instead of calling sys_execve so we 81 * end up with proper pt_regs. 82 */ 83 int kernel_execve(const char *filename, 84 const char *const argv[], 85 const char *const envp[]) 86 { 87 register const char *__a __asm__("r5") = filename; 88 register const void *__b __asm__("r6") = argv; 89 register const void *__c __asm__("r7") = envp; 90 register unsigned long __syscall __asm__("r12") = __NR_execve; 91 register unsigned long __ret __asm__("r3"); 92 __asm__ __volatile__ ("brki r14, 0x8" 93 : "=r" (__ret), "=r" (__syscall) 94 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) 95 : "r4", "r8", "r9", 96 "r10", "r11", "r14", "cc", "memory"); 97 return __ret; 98 } 99