2 * arch/score/kernel/syscall.c
4 * Score Processor version.
6 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
7 * Chen Liqin <liqin.chen@sunplusct.com>
8 * Lennox Wu <lennox.wu@sunplusct.com>
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.
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.
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
26 #include <linux/file.h>
29 #include <linux/mman.h>
30 #include <linux/module.h>
31 #include <linux/slab.h>
32 #include <linux/unistd.h>
33 #include <linux/syscalls.h>
34 #include <asm/syscalls.h>
37 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
38 unsigned long flags, unsigned long fd, unsigned long pgoff)
40 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
44 sys_mmap(unsigned long addr, unsigned long len, unsigned long prot,
45 unsigned long flags, unsigned long fd, off_t offset)
47 if (unlikely(offset & ~PAGE_MASK))
49 return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
53 score_fork(struct pt_regs *regs)
55 return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL);
59 * Clone a task - this clones the calling program thread.
60 * This is called indirectly via a small wrapper
63 score_clone(struct pt_regs *regs)
65 unsigned long clone_flags;
67 int __user *parent_tidptr, *child_tidptr;
69 clone_flags = regs->regs[4];
70 newsp = regs->regs[5];
72 newsp = regs->regs[0];
73 parent_tidptr = (int __user *)regs->regs[6];
74 child_tidptr = (int __user *)regs->regs[8];
76 return do_fork(clone_flags, newsp, regs, 0,
77 parent_tidptr, child_tidptr);
81 score_vfork(struct pt_regs *regs)
83 return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
84 regs->regs[0], regs, 0, NULL, NULL);
88 * sys_execve() executes a new program.
89 * This is called indirectly via a small wrapper
92 score_execve(struct pt_regs *regs)
97 filename = getname((char __user*)regs->regs[4]);
98 error = PTR_ERR(filename);
102 error = do_execve(filename,
103 (const char __user *const __user *)regs->regs[5],
104 (const char __user *const __user *)regs->regs[6],
112 * Do a system call from kernel instead of calling sys_execve so we
113 * end up with proper pt_regs.
115 int kernel_execve(const char *filename,
116 const char *const argv[],
117 const char *const envp[])
119 register unsigned long __r4 asm("r4") = (unsigned long) filename;
120 register unsigned long __r5 asm("r5") = (unsigned long) argv;
121 register unsigned long __r6 asm("r6") = (unsigned long) envp;
122 register unsigned long __r7 asm("r7");
124 __asm__ __volatile__ (" \n"
129 : "=&r" (__r4), "=r" (__r7)
130 : "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve)
131 : "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25",
132 "r26", "r27", "memory");