![Christoph Hellwig](/assets/img/avatar_default.png)
On an architecture that supports 32-bit compat we need to override the reported machine in uname with the 32-bit value. Instead of doing this separately in every architecture introduce a COMPAT_UTS_MACHINE define in <asm/compat.h> and apply it directly in sys_newuname(). 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> Cc: 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
237 lines
6.7 KiB
C
237 lines
6.7 KiB
C
|
|
/*
|
|
* PARISC specific syscalls
|
|
*
|
|
* Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
|
|
* Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
|
|
* Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
|
|
*
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <linux/file.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/personality.h>
|
|
|
|
static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
|
|
{
|
|
struct vm_area_struct *vma;
|
|
|
|
addr = PAGE_ALIGN(addr);
|
|
|
|
for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
|
|
/* At this point: (!vma || addr < vma->vm_end). */
|
|
if (TASK_SIZE - len < addr)
|
|
return -ENOMEM;
|
|
if (!vma || addr + len <= vma->vm_start)
|
|
return addr;
|
|
addr = vma->vm_end;
|
|
}
|
|
}
|
|
|
|
#define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1))
|
|
|
|
/*
|
|
* We need to know the offset to use. Old scheme was to look for
|
|
* existing mapping and use the same offset. New scheme is to use the
|
|
* address of the kernel data structure as the seed for the offset.
|
|
* We'll see how that works...
|
|
*
|
|
* The mapping is cacheline aligned, so there's no information in the bottom
|
|
* few bits of the address. We're looking for 10 bits (4MB / 4k), so let's
|
|
* drop the bottom 8 bits and use bits 8-17.
|
|
*/
|
|
static int get_offset(struct address_space *mapping)
|
|
{
|
|
int offset = (unsigned long) mapping << (PAGE_SHIFT - 8);
|
|
return offset & 0x3FF000;
|
|
}
|
|
|
|
static unsigned long get_shared_area(struct address_space *mapping,
|
|
unsigned long addr, unsigned long len, unsigned long pgoff)
|
|
{
|
|
struct vm_area_struct *vma;
|
|
int offset = mapping ? get_offset(mapping) : 0;
|
|
|
|
addr = DCACHE_ALIGN(addr - offset) + offset;
|
|
|
|
for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
|
|
/* At this point: (!vma || addr < vma->vm_end). */
|
|
if (TASK_SIZE - len < addr)
|
|
return -ENOMEM;
|
|
if (!vma || addr + len <= vma->vm_start)
|
|
return addr;
|
|
addr = DCACHE_ALIGN(vma->vm_end - offset) + offset;
|
|
if (addr < vma->vm_end) /* handle wraparound */
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
|
|
unsigned long len, unsigned long pgoff, unsigned long flags)
|
|
{
|
|
if (len > TASK_SIZE)
|
|
return -ENOMEM;
|
|
/* Might want to check for cache aliasing issues for MAP_FIXED case
|
|
* like ARM or MIPS ??? --BenH.
|
|
*/
|
|
if (flags & MAP_FIXED)
|
|
return addr;
|
|
if (!addr)
|
|
addr = TASK_UNMAPPED_BASE;
|
|
|
|
if (filp) {
|
|
addr = get_shared_area(filp->f_mapping, addr, len, pgoff);
|
|
} else if(flags & MAP_SHARED) {
|
|
addr = get_shared_area(NULL, addr, len, pgoff);
|
|
} else {
|
|
addr = get_unshared_area(addr, len);
|
|
}
|
|
return addr;
|
|
}
|
|
|
|
asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags, unsigned long fd,
|
|
unsigned long pgoff)
|
|
{
|
|
/* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
|
|
we have. */
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd,
|
|
pgoff >> (PAGE_SHIFT - 12));
|
|
}
|
|
|
|
asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags, unsigned long fd,
|
|
unsigned long offset)
|
|
{
|
|
if (!(offset & ~PAGE_MASK)) {
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd,
|
|
offset >> PAGE_SHIFT);
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Fucking broken ABI */
|
|
|
|
#ifdef CONFIG_64BIT
|
|
asmlinkage long parisc_truncate64(const char __user * path,
|
|
unsigned int high, unsigned int low)
|
|
{
|
|
return sys_truncate(path, (long)high << 32 | low);
|
|
}
|
|
|
|
asmlinkage long parisc_ftruncate64(unsigned int fd,
|
|
unsigned int high, unsigned int low)
|
|
{
|
|
return sys_ftruncate(fd, (long)high << 32 | low);
|
|
}
|
|
|
|
/* stubs for the benefit of the syscall_table since truncate64 and truncate
|
|
* are identical on LP64 */
|
|
asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
|
|
{
|
|
return sys_truncate(path, length);
|
|
}
|
|
asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
|
|
{
|
|
return sys_ftruncate(fd, length);
|
|
}
|
|
asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
|
|
{
|
|
return sys_fcntl(fd, cmd, arg);
|
|
}
|
|
#else
|
|
|
|
asmlinkage long parisc_truncate64(const char __user * path,
|
|
unsigned int high, unsigned int low)
|
|
{
|
|
return sys_truncate64(path, (loff_t)high << 32 | low);
|
|
}
|
|
|
|
asmlinkage long parisc_ftruncate64(unsigned int fd,
|
|
unsigned int high, unsigned int low)
|
|
{
|
|
return sys_ftruncate64(fd, (loff_t)high << 32 | low);
|
|
}
|
|
#endif
|
|
|
|
asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
|
|
unsigned int high, unsigned int low)
|
|
{
|
|
return sys_pread64(fd, buf, count, (loff_t)high << 32 | low);
|
|
}
|
|
|
|
asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
|
|
size_t count, unsigned int high, unsigned int low)
|
|
{
|
|
return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
|
|
}
|
|
|
|
asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
|
|
size_t count)
|
|
{
|
|
return sys_readahead(fd, (loff_t)high << 32 | low, count);
|
|
}
|
|
|
|
asmlinkage long parisc_fadvise64_64(int fd,
|
|
unsigned int high_off, unsigned int low_off,
|
|
unsigned int high_len, unsigned int low_len, int advice)
|
|
{
|
|
return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
|
|
(loff_t)high_len << 32 | low_len, advice);
|
|
}
|
|
|
|
asmlinkage long parisc_sync_file_range(int fd,
|
|
u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
|
|
unsigned int flags)
|
|
{
|
|
return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
|
|
(loff_t)hi_nbytes << 32 | lo_nbytes, flags);
|
|
}
|
|
|
|
asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
|
|
{
|
|
return -ENOMEM;
|
|
}
|
|
|
|
asmlinkage int sys_free_hugepages(unsigned long addr)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
long parisc_personality(unsigned long personality)
|
|
{
|
|
long err;
|
|
|
|
if (personality(current->personality) == PER_LINUX32
|
|
&& personality == PER_LINUX)
|
|
personality = PER_LINUX32;
|
|
|
|
err = sys_personality(personality);
|
|
if (err == PER_LINUX32)
|
|
err = PER_LINUX;
|
|
|
|
return err;
|
|
}
|