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Add generic sys_old_mmap()

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Add a generic implementation of the old mmap() syscall, which expects its
argument in a memory block and switch all architectures over to use it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Reviewed-by: H. Peter Anvin <hpa@zytor.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: James Morris <jmorris@namei.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig
2010-03-10 15:21:15 -08:00
committed by Linus Torvalds
parent 5d0e52830e
commit a4679373cf
31 changed files with 79 additions and 258 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/um/sys-i386/shared/sysdep/syscalls.h
View File

@@ -13,8 +13,6 @@ typedef long syscall_handler_t(struct pt_regs);
*/
extern syscall_handler_t sys_rt_sigaction;
extern syscall_handler_t old_mmap_i386;
extern syscall_handler_t *sys_call_table[];
#define EXECUTE_SYSCALL(syscall, regs) \

2
arch/um/sys-i386/sys_call_table.S
View File

@@ -7,7 +7,7 @@
#define sys_vm86old sys_ni_syscall
#define sys_vm86 sys_ni_syscall
#define old_mmap old_mmap_i386
#define old_mmap sys_old_mmap
#define ptregs_fork sys_fork
#define ptregs_execve sys_execve

33
arch/um/sys-i386/syscalls.c
View File

@@ -11,39 +11,6 @@
#include "asm/uaccess.h"
#include "asm/unistd.h"
/*
* Perform the select(nd, in, out, ex, tv) and mmap() system
* calls. Linux/i386 didn't use to be able to handle more than
* 4 system call parameters, so these system calls used a memory
* block for parameter passing..
*/
struct mmap_arg_struct {
unsigned long addr;
unsigned long len;
unsigned long prot;
unsigned long flags;
unsigned long fd;
unsigned long offset;
};
extern int old_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long offset);
long old_mmap_i386(struct mmap_arg_struct __user *arg)
{
struct mmap_arg_struct a;
int err = -EFAULT;
if (copy_from_user(&a, arg, sizeof(a)))
goto out;
err = old_mmap(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
out:
return err;
}
/*
* The prototype on i386 is:
*