b9398a8459
Signed-off-by: Richard Kuo <rkuo@codeaurora.org> Signed-off-by: Linas Vepstas <linas@codeaurora.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
|
|
* Hexagon system calls
|
|
*
|
|
* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 as published by the Free Software Foundation.
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
* 02110-1301, USA.
|
|
*/
|
|
|
|
#include <linux/file.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/unistd.h>
|
|
#include <asm/mman.h>
|
|
#include <asm/registers.h>
|
|
|
|
/*
|
|
* System calls with architecture-specific wrappers.
|
|
* See signal.c for signal-related system call wrappers.
|
|
*/
|
|
|
|
asmlinkage int sys_execve(char __user *ufilename,
|
|
const char __user *const __user *argv,
|
|
const char __user *const __user *envp)
|
|
{
|
|
struct pt_regs *pregs = current_thread_info()->regs;
|
|
char *filename;
|
|
int retval;
|
|
|
|
filename = getname(ufilename);
|
|
retval = PTR_ERR(filename);
|
|
if (IS_ERR(filename))
|
|
return retval;
|
|
|
|
retval = do_execve(filename, argv, envp, pregs);
|
|
putname(filename);
|
|
|
|
return retval;
|
|
}
|
|
|
|
asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
|
|
unsigned long parent_tidp, unsigned long child_tidp)
|
|
{
|
|
struct pt_regs *pregs = current_thread_info()->regs;
|
|
|
|
if (!newsp)
|
|
newsp = pregs->SP;
|
|
return do_fork(clone_flags, newsp, pregs, 0, (int __user *)parent_tidp,
|
|
(int __user *)child_tidp);
|
|
}
|
|
|
|
/*
|
|
* Do a system call from the kernel, so as to have a proper pt_regs
|
|
* and recycle the sys_execvpe infrustructure.
|
|
*/
|
|
int kernel_execve(const char *filename,
|
|
const char *const argv[], const char *const envp[])
|
|
{
|
|
register unsigned long __a0 asm("r0") = (unsigned long) filename;
|
|
register unsigned long __a1 asm("r1") = (unsigned long) argv;
|
|
register unsigned long __a2 asm("r2") = (unsigned long) envp;
|
|
int retval;
|
|
|
|
__asm__ volatile(
|
|
" R6 = #%4;\n"
|
|
" trap0(#1);\n"
|
|
" %0 = R0;\n"
|
|
: "=r" (retval)
|
|
: "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
|
|
);
|
|
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(kernel_execve);
|