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>
28 #include <linux/mman.h>
29 #include <linux/module.h>
30 #include <linux/unistd.h>
32 unsigned long shm_align_mask = PAGE_SIZE - 1;
33 EXPORT_SYMBOL(shm_align_mask);
35 asmlinkage unsigned long
36 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
37 unsigned long flags, unsigned long fd, unsigned long pgoff)
40 struct file *file = NULL;
42 if (pgoff & (~PAGE_MASK >> 12))
45 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
46 if (!(flags & MAP_ANONYMOUS)) {
52 down_write(¤t->mm->mmap_sem);
53 error = do_mmap_pgoff(file, addr, len, prot, flags,
54 pgoff >> (PAGE_SHIFT - 12));
55 up_write(¤t->mm->mmap_sem);
64 * Clone a task - this clones the calling program thread.
65 * This is called indirectly via a small wrapper
67 int score_clone(struct pt_regs *regs)
69 unsigned long clone_flags;
71 int __user *parent_tidptr, *child_tidptr;
73 clone_flags = regs->regs[4];
74 newsp = regs->regs[5];
76 newsp = regs->regs[0];
77 parent_tidptr = (int __user *)regs->regs[6];
78 child_tidptr = (int __user *)regs->regs[8];
80 return do_fork(clone_flags, newsp, regs, 0,
81 parent_tidptr, child_tidptr);
85 * sys_execve() executes a new program.
86 * This is called indirectly via a small wrapper
88 int score_execve(struct pt_regs *regs)
93 filename = getname((char *) (long) regs->regs[4]);
94 error = PTR_ERR(filename);
98 error = do_execve(filename, (char **) (long) regs->regs[5],
99 (char **) (long) regs->regs[6], regs);
106 * If we ever come here the user sp is bad. Zap the process right away.
107 * Due to the bad stack signaling wouldn't work.
115 * Do a system call from kernel instead of calling sys_execve so we
116 * end up with proper pt_regs.
118 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
120 register unsigned long __r4 asm("r4") = (unsigned long) filename;
121 register unsigned long __r5 asm("r5") = (unsigned long) argv;
122 register unsigned long __r6 asm("r6") = (unsigned long) envp;
123 register unsigned long __r7 asm("r7");
125 __asm__ __volatile__ (" \n"
130 : "=&r" (__r4), "=r" (__r7)
131 : "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve)
132 : "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25",
133 "r26", "r27", "memory");