]>
Commit | Line | Data |
---|---|---|
6bc9a396 CL |
1 | /* |
2 | * arch/score/kernel/syscall.c | |
3 | * | |
4 | * Score Processor version. | |
5 | * | |
6 | * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. | |
7 | * Chen Liqin <liqin.chen@sunplusct.com> | |
8 | * Lennox Wu <lennox.wu@sunplusct.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, see the file COPYING, or write | |
22 | * to the Free Software Foundation, Inc., | |
23 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <linux/file.h> | |
27 | #include <linux/fs.h> | |
cf52c468 | 28 | #include <linux/mm.h> |
6bc9a396 CL |
29 | #include <linux/mman.h> |
30 | #include <linux/module.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
6bc9a396 | 32 | #include <linux/unistd.h> |
9fb24cc5 AB |
33 | #include <linux/syscalls.h> |
34 | #include <asm/syscalls.h> | |
6bc9a396 | 35 | |
c6067472 | 36 | asmlinkage long |
6bc9a396 CL |
37 | sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, |
38 | unsigned long flags, unsigned long fd, unsigned long pgoff) | |
39 | { | |
f8b72560 | 40 | return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); |
6bc9a396 CL |
41 | } |
42 | ||
cf52c468 CL |
43 | asmlinkage long |
44 | sys_mmap(unsigned long addr, unsigned long len, unsigned long prot, | |
aa656073 | 45 | unsigned long flags, unsigned long fd, off_t offset) |
cf52c468 | 46 | { |
aa656073 AV |
47 | if (unlikely(offset & ~PAGE_MASK)) |
48 | return -EINVAL; | |
49 | return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | |
cf52c468 CL |
50 | } |
51 | ||
52 | asmlinkage long | |
53 | score_fork(struct pt_regs *regs) | |
54 | { | |
55 | return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL); | |
56 | } | |
57 | ||
6bc9a396 CL |
58 | /* |
59 | * Clone a task - this clones the calling program thread. | |
60 | * This is called indirectly via a small wrapper | |
61 | */ | |
bddc6059 AB |
62 | asmlinkage long |
63 | score_clone(struct pt_regs *regs) | |
6bc9a396 CL |
64 | { |
65 | unsigned long clone_flags; | |
66 | unsigned long newsp; | |
67 | int __user *parent_tidptr, *child_tidptr; | |
68 | ||
69 | clone_flags = regs->regs[4]; | |
70 | newsp = regs->regs[5]; | |
71 | if (!newsp) | |
72 | newsp = regs->regs[0]; | |
73 | parent_tidptr = (int __user *)regs->regs[6]; | |
f673c032 | 74 | child_tidptr = (int __user *)regs->regs[8]; |
6bc9a396 CL |
75 | |
76 | return do_fork(clone_flags, newsp, regs, 0, | |
77 | parent_tidptr, child_tidptr); | |
78 | } | |
79 | ||
cf52c468 CL |
80 | asmlinkage long |
81 | score_vfork(struct pt_regs *regs) | |
82 | { | |
83 | return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, | |
84 | regs->regs[0], regs, 0, NULL, NULL); | |
85 | } | |
86 | ||
6bc9a396 CL |
87 | /* |
88 | * sys_execve() executes a new program. | |
89 | * This is called indirectly via a small wrapper | |
90 | */ | |
a1f8213b AB |
91 | asmlinkage long |
92 | score_execve(struct pt_regs *regs) | |
6bc9a396 CL |
93 | { |
94 | int error; | |
95 | char *filename; | |
96 | ||
a1f8213b | 97 | filename = getname((char __user*)regs->regs[4]); |
6bc9a396 CL |
98 | error = PTR_ERR(filename); |
99 | if (IS_ERR(filename)) | |
100 | return error; | |
101 | ||
a1f8213b AB |
102 | error = do_execve(filename, (char __user *__user*)regs->regs[5], |
103 | (char __user *__user *) regs->regs[6], regs); | |
6bc9a396 CL |
104 | |
105 | putname(filename); | |
106 | return error; | |
107 | } | |
108 | ||
6bc9a396 CL |
109 | /* |
110 | * Do a system call from kernel instead of calling sys_execve so we | |
111 | * end up with proper pt_regs. | |
112 | */ | |
113 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) | |
114 | { | |
115 | register unsigned long __r4 asm("r4") = (unsigned long) filename; | |
116 | register unsigned long __r5 asm("r5") = (unsigned long) argv; | |
117 | register unsigned long __r6 asm("r6") = (unsigned long) envp; | |
118 | register unsigned long __r7 asm("r7"); | |
119 | ||
120 | __asm__ __volatile__ (" \n" | |
121 | "ldi r27, %5 \n" | |
122 | "syscall \n" | |
123 | "mv %0, r4 \n" | |
124 | "mv %1, r7 \n" | |
125 | : "=&r" (__r4), "=r" (__r7) | |
126 | : "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve) | |
127 | : "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25", | |
128 | "r26", "r27", "memory"); | |
129 | ||
130 | if (__r7 == 0) | |
131 | return __r4; | |
132 | ||
133 | return -__r4; | |
134 | } |