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
microblaze_vfork(struct pt_regs * regs)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
microblaze_clone(int flags,unsigned long stack,struct pt_regs * regs)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
microblaze_execve(const char __user * filenamei,const char __user * const __user * argv,const char __user * const __user * envp,struct pt_regs * regs)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
sys_mmap(unsigned long addr,unsigned long len,unsigned long prot,unsigned long flags,unsigned long fd,off_t pgoff)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 */
kernel_execve(const char * filename,const char * const argv[],const char * const envp[])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