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7dcbbb2b MS |
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> | |
7dcbbb2b MS |
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> | |
7dcbbb2b MS |
26 | #include <linux/file.h> |
27 | #include <linux/module.h> | |
28 | #include <linux/err.h> | |
29 | #include <linux/fs.h> | |
7dcbbb2b | 30 | #include <linux/semaphore.h> |
7dcbbb2b MS |
31 | #include <linux/uaccess.h> |
32 | #include <linux/unistd.h> | |
33 | ||
34 | #include <asm/syscalls.h> | |
7dcbbb2b | 35 | |
e513588f | 36 | asmlinkage long microblaze_vfork(struct pt_regs *regs) |
7dcbbb2b MS |
37 | { |
38 | return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1, | |
39 | regs, 0, NULL, NULL); | |
40 | } | |
41 | ||
e513588f | 42 | asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs) |
7dcbbb2b MS |
43 | { |
44 | if (!stack) | |
45 | stack = regs->r1; | |
46 | return do_fork(flags, stack, regs, 0, NULL, NULL); | |
47 | } | |
48 | ||
e513588f | 49 | asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv, |
7dcbbb2b MS |
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 | ||
e513588f AB |
65 | asmlinkage long |
66 | sys_mmap2(unsigned long addr, unsigned long len, | |
7dcbbb2b MS |
67 | unsigned long prot, unsigned long flags, |
68 | unsigned long fd, unsigned long pgoff) | |
69 | { | |
70 | struct file *file = NULL; | |
71 | int ret = -EBADF; | |
72 | ||
73 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
74 | if (!(flags & MAP_ANONYMOUS)) { | |
75 | file = fget(fd); | |
76 | if (!file) { | |
77 | printk(KERN_INFO "no fd in mmap\r\n"); | |
78 | goto out; | |
79 | } | |
80 | } | |
81 | ||
82 | down_write(¤t->mm->mmap_sem); | |
83 | ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
84 | up_write(¤t->mm->mmap_sem); | |
85 | if (file) | |
86 | fput(file); | |
87 | out: | |
88 | return ret; | |
89 | } | |
90 | ||
e513588f | 91 | asmlinkage long sys_mmap(unsigned long addr, unsigned long len, |
7dcbbb2b | 92 | unsigned long prot, unsigned long flags, |
e513588f | 93 | unsigned long fd, off_t pgoff) |
7dcbbb2b MS |
94 | { |
95 | int err = -EINVAL; | |
96 | ||
e513588f | 97 | if (pgoff & ~PAGE_MASK) { |
7dcbbb2b MS |
98 | printk(KERN_INFO "no pagemask in mmap\r\n"); |
99 | goto out; | |
100 | } | |
101 | ||
e513588f | 102 | err = sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); |
7dcbbb2b MS |
103 | out: |
104 | return err; | |
105 | } | |
106 | ||
107 | /* | |
108 | * Do a system call from kernel instead of calling sys_execve so we | |
109 | * end up with proper pt_regs. | |
110 | */ | |
111 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) | |
112 | { | |
113 | register const char *__a __asm__("r5") = filename; | |
114 | register const void *__b __asm__("r6") = argv; | |
115 | register const void *__c __asm__("r7") = envp; | |
116 | register unsigned long __syscall __asm__("r12") = __NR_execve; | |
117 | register unsigned long __ret __asm__("r3"); | |
118 | __asm__ __volatile__ ("brki r14, 0x8" | |
119 | : "=r" (__ret), "=r" (__syscall) | |
120 | : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) | |
121 | : "r4", "r8", "r9", | |
122 | "r10", "r11", "r14", "cc", "memory"); | |
123 | return __ret; | |
124 | } |