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Date: Wed, 26 Aug 2009 14:30:35 +0800
From: Chen Liqin <liqin.chen@...plusct.com>
To: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>, torvalds@...ux-foundation.org
Subject: Subject: [PATCH 24/33] score: create kernel/ files
sys_call_table.c sys_score.c
>>From 6272fcf4113acfbf4d3e00fbf6c6ee8738a1e0cf Mon Sep 17 00:00:00 2001
From: Chen Liqin <liqin.chen@...plusct.com>
Date: Wed, 26 Aug 2009 10:05:08 +0800
Subject: [PATCH 24/33] score: create kernel/ files sys_call_table.c sys_score.c
Signed-off-by: Chen Liqin <liqin.chen@...plusct.com>
---
arch/score/kernel/sys_call_table.c | 12 +++
arch/score/kernel/sys_score.c | 131 ++++++++++++++++++++++++++++++++++++
2 files changed, 143 insertions(+), 0 deletions(-)
create mode 100644 arch/score/kernel/sys_call_table.c
create mode 100644 arch/score/kernel/sys_score.c
diff --git a/arch/score/kernel/sys_call_table.c b/arch/score/kernel/sys_call_table.c
new file mode 100644
index 0000000..287369b
--- /dev/null
+++ b/arch/score/kernel/sys_call_table.c
@@ -0,0 +1,12 @@
+#include <linux/syscalls.h>
+#include <linux/signal.h>
+#include <linux/unistd.h>
+
+#include <asm/syscalls.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+void *sys_call_table[__NR_syscalls] = {
+#include <asm/unistd.h>
+};
diff --git a/arch/score/kernel/sys_score.c b/arch/score/kernel/sys_score.c
new file mode 100644
index 0000000..61aff8a
--- /dev/null
+++ b/arch/score/kernel/sys_score.c
@@ -0,0 +1,131 @@
+/*
+ * arch/score/kernel/syscall.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@...plusct.com>
+ * Lennox Wu <lennox.wu@...plusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/mman.h>
+#include <linux/module.h>
+#include <linux/unistd.h>
+#include <linux/syscalls.h>
+#include <asm/syscalls.h>
+
+asmlinkage long
+sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
+ unsigned long flags, unsigned long fd, unsigned long pgoff)
+{
+ int error = -EBADF;
+ struct file *file = NULL;
+
+ if (pgoff & (~PAGE_MASK >> 12))
+ return -EINVAL;
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ return error;
+ }
+
+ down_write(¤t->mm->mmap_sem);
+ error = do_mmap_pgoff(file, addr, len, prot, flags,
+ pgoff >> (PAGE_SHIFT - 12));
+ up_write(¤t->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+
+ return error;
+}
+
+/*
+ * Clone a task - this clones the calling program thread.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage long
+score_clone(struct pt_regs *regs)
+{
+ unsigned long clone_flags;
+ unsigned long newsp;
+ int __user *parent_tidptr, *child_tidptr;
+
+ clone_flags = regs->regs[4];
+ newsp = regs->regs[5];
+ if (!newsp)
+ newsp = regs->regs[0];
+ parent_tidptr = (int __user *)regs->regs[6];
+ child_tidptr = (int __user *)regs->regs[8];
+
+ return do_fork(clone_flags, newsp, regs, 0,
+ parent_tidptr, child_tidptr);
+}
+
+/*
+ * sys_execve() executes a new program.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage long
+score_execve(struct pt_regs *regs)
+{
+ int error;
+ char *filename;
+
+ filename = getname((char __user*)regs->regs[4]);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ return error;
+
+ error = do_execve(filename, (char __user *__user*)regs->regs[5],
+ (char __user *__user *) regs->regs[6], regs);
+
+ putname(filename);
+ return error;
+}
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+ register unsigned long __r4 asm("r4") = (unsigned long) filename;
+ register unsigned long __r5 asm("r5") = (unsigned long) argv;
+ register unsigned long __r6 asm("r6") = (unsigned long) envp;
+ register unsigned long __r7 asm("r7");
+
+ __asm__ __volatile__ (" \n"
+ "ldi r27, %5 \n"
+ "syscall \n"
+ "mv %0, r4 \n"
+ "mv %1, r7 \n"
+ : "=&r" (__r4), "=r" (__r7)
+ : "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve)
+ : "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25",
+ "r26", "r27", "memory");
+
+ if (__r7 == 0)
+ return __r4;
+
+ return -__r4;
+}
--
1.6.2
--
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