mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 01:31:44 +00:00
818d8462bb
These changes make the syscall table line up correctly for tilegx compat mode, and remove the stale sys32_fadvise64() function, which isn't actually used by any syscall table. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
/*
|
|
* Copyright 2010 Tilera Corporation. 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
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* 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, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* This file contains various random system calls that
|
|
* have a non-standard calling sequence on the Linux/TILE
|
|
* platform.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/file.h>
|
|
#include <linux/mempolicy.h>
|
|
#include <linux/binfmts.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/signal.h>
|
|
#include <asm/syscalls.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/homecache.h>
|
|
#include <arch/chip.h>
|
|
|
|
SYSCALL_DEFINE0(flush_cache)
|
|
{
|
|
homecache_evict(cpumask_of(smp_processor_id()));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Syscalls that pass 64-bit values on 32-bit systems normally
|
|
* pass them as (low,high) word packed into the immediately adjacent
|
|
* registers. If the low word naturally falls on an even register,
|
|
* our ABI makes it work correctly; if not, we adjust it here.
|
|
* Handling it here means we don't have to fix uclibc AND glibc AND
|
|
* any other standard libcs we want to support.
|
|
*/
|
|
|
|
#if !defined(__tilegx__) || defined(CONFIG_COMPAT)
|
|
|
|
ssize_t sys32_readahead(int fd, u32 offset_lo, u32 offset_hi, u32 count)
|
|
{
|
|
return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count);
|
|
}
|
|
|
|
int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi,
|
|
u32 len_lo, u32 len_hi, int advice)
|
|
{
|
|
return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo,
|
|
((loff_t)len_hi << 32) | len_lo, advice);
|
|
}
|
|
|
|
#endif /* 32-bit syscall wrappers */
|
|
|
|
/* Note: used by the compat code even in 64-bit Linux. */
|
|
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
|
|
unsigned long, prot, unsigned long, flags,
|
|
unsigned long, fd, unsigned long, off_4k)
|
|
{
|
|
#define PAGE_ADJUST (PAGE_SHIFT - 12)
|
|
if (off_4k & ((1 << PAGE_ADJUST) - 1))
|
|
return -EINVAL;
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd,
|
|
off_4k >> PAGE_ADJUST);
|
|
}
|
|
|
|
#ifdef __tilegx__
|
|
SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
|
|
unsigned long, prot, unsigned long, flags,
|
|
unsigned long, fd, off_t, offset)
|
|
{
|
|
if (offset & ((1 << PAGE_SHIFT) - 1))
|
|
return -EINVAL;
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd,
|
|
offset >> PAGE_SHIFT);
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Provide the actual syscall number to call mapping. */
|
|
#undef __SYSCALL
|
|
#define __SYSCALL(nr, call) [nr] = (call),
|
|
|
|
#ifndef __tilegx__
|
|
/* See comments at the top of the file. */
|
|
#define sys_fadvise64_64 sys32_fadvise64_64
|
|
#define sys_readahead sys32_readahead
|
|
#endif
|
|
|
|
/* Call the trampolines to manage pt_regs where necessary. */
|
|
#define sys_execve _sys_execve
|
|
#define sys_sigaltstack _sys_sigaltstack
|
|
#define sys_rt_sigreturn _sys_rt_sigreturn
|
|
#define sys_clone _sys_clone
|
|
#ifndef __tilegx__
|
|
#define sys_cmpxchg_badaddr _sys_cmpxchg_badaddr
|
|
#endif
|
|
|
|
/*
|
|
* Note that we can't include <linux/unistd.h> here since the header
|
|
* guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
|
|
*/
|
|
void *sys_call_table[__NR_syscalls] = {
|
|
[0 ... __NR_syscalls-1] = sys_ni_syscall,
|
|
#include <asm/unistd.h>
|
|
};
|