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1f51eb3a88
This backports the following upstream commits all as one patch:54f5de7099ecc1a899371a0ef85f84f106af4e90097eed1038935874141d0ec62d2909c4caa778152ea1d13f64570dcf2c15564b3bffc60067bd8a55f8b72560968c7b49b3ec9206de95b12c6a10161d05d72faa6dbb52d66940e77414e0aaaa65607373Backport done by Greg Kroah-Hartman. Only minor tweaks were needed. Cc: David S. Miller <davem@davemloft.net> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
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*
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* Copyright (C) 2006 Atmark Techno, Inc.
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* Yasushi SHOJI <yashi@atmark-techno.com>
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* Tetsuya OHKAWA <tetsuya@atmark-techno.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/syscalls.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/stat.h>
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#include <linux/mman.h>
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#include <linux/sys.h>
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#include <linux/ipc.h>
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#include <linux/file.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/fs.h>
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#include <linux/semaphore.h>
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#include <linux/uaccess.h>
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#include <linux/unistd.h>
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#include <asm/syscalls.h>
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asmlinkage long microblaze_vfork(struct pt_regs *regs)
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{
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return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1,
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regs, 0, NULL, NULL);
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}
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asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs)
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{
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if (!stack)
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stack = regs->r1;
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return do_fork(flags, stack, regs, 0, NULL, NULL);
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}
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asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv,
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char __user *__user *envp, struct pt_regs *regs)
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{
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int error;
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char *filename;
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filename = getname(filenamei);
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error = PTR_ERR(filename);
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if (IS_ERR(filename))
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goto out;
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error = do_execve(filename, argv, envp, regs);
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putname(filename);
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out:
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return error;
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}
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asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, off_t pgoff)
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{
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if (pgoff & ~PAGE_MASK)
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return -EINVAL;
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return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
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}
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/*
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* Do a system call from kernel instead of calling sys_execve so we
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* end up with proper pt_regs.
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*/
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int kernel_execve(const char *filename, char *const argv[], char *const envp[])
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{
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register const char *__a __asm__("r5") = filename;
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register const void *__b __asm__("r6") = argv;
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register const void *__c __asm__("r7") = envp;
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register unsigned long __syscall __asm__("r12") = __NR_execve;
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register unsigned long __ret __asm__("r3");
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__asm__ __volatile__ ("brki r14, 0x8"
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: "=r" (__ret), "=r" (__syscall)
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: "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
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: "r4", "r8", "r9",
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"r10", "r11", "r14", "cc", "memory");
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return __ret;
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}
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