Release 4.14 arch/x86/ia32/sys_ia32.c

// SPDX-License-Identifier: GPL-2.0
/*
 * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
 *             sys_sparc32
 *
 * Copyright (C) 2000           VA Linux Co
 * Copyright (C) 2000           Don Dugger <n0ano@valinux.com>
 * Copyright (C) 1999           Arun Sharma <arun.sharma@intel.com>
 * Copyright (C) 1997,1998      Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997           David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 2000           Hewlett-Packard Co.
 * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
 * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment. In 2.5 most of this should be moved to a generic directory.
 *
 * This file assumes that there is a hole at the end of user address space.
 *
 * Some of the functions are LE specific currently. These are
 * hopefully all marked.  This should be fixed.
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/signal.h>
#include <linux/syscalls.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/mm.h>
#include <linux/uio.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/rwsem.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/highuid.h>
#include <linux/sysctl.h>
#include <linux/slab.h>
#include <asm/mman.h>
#include <asm/types.h>
#include <linux/uaccess.h>
#include <linux/atomic.h>
#include <asm/vgtod.h>
#include <asm/sys_ia32.h>


#define AA(__x)		((unsigned long)(__x))




asmlinkage long sys32_truncate64(const char __user *filename,
				 unsigned long offset_low,
				 unsigned long offset_high)
{
       return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
35
94.59%
1
33.33%
Al Viro
1
2.70%
1
33.33%
David Howells
1
2.70%
1
33.33%
Total
37
100.00%
3
100.00%



asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
				  unsigned long offset_high)
{
       return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
35
100.00%
1
100.00%
Total
35
100.00%
1
100.00%

/*
 * Another set for IA32/LFS -- x86_64 struct stat is different due to
 * support for 64bit inode numbers.
 */


static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
{
	typeof(ubuf->st_uid) uid = 0;
	typeof(ubuf->st_gid) gid = 0;
	SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
	SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
	    __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
	    __put_user(stat->ino, &ubuf->__st_ino) ||
	    __put_user(stat->ino, &ubuf->st_ino) ||
	    __put_user(stat->mode, &ubuf->st_mode) ||
	    __put_user(stat->nlink, &ubuf->st_nlink) ||
	    __put_user(uid, &ubuf->st_uid) ||
	    __put_user(gid, &ubuf->st_gid) ||
	    __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
	    __put_user(stat->size, &ubuf->st_size) ||
	    __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
	    __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
	    __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
	    __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
	    __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
	    __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
	    __put_user(stat->blksize, &ubuf->st_blksize) ||
	    __put_user(stat->blocks, &ubuf->st_blocks))
		return -EFAULT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
236
77.63%
3
37.50%
Al Viro
54
17.76%
3
37.50%
Eric W. Biedermann
12
3.95%
1
12.50%
Jesper Juhl
2
0.66%
1
12.50%
Total
304
100.00%
8
100.00%



asmlinkage long sys32_stat64(const char __user *filename,
			     struct stat64 __user *statbuf)
{
	struct kstat stat;
	int ret = vfs_stat(filename, &stat);

	if (!ret)
		ret = cp_stat64(statbuf, &stat);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
34
66.67%
1
25.00%
Al Viro
16
31.37%
2
50.00%
David Howells
1
1.96%
1
25.00%
Total
51
100.00%
4
100.00%



asmlinkage long sys32_lstat64(const char __user *filename,
			      struct stat64 __user *statbuf)
{
	struct kstat stat;
	int ret = vfs_lstat(filename, &stat);
	if (!ret)
		ret = cp_stat64(statbuf, &stat);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
34
66.67%
1
25.00%
Al Viro
16
31.37%
2
50.00%
David Howells
1
1.96%
1
25.00%
Total
51
100.00%
4
100.00%



asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
{
	struct kstat stat;
	int ret = vfs_fstat(fd, &stat);
	if (!ret)
		ret = cp_stat64(statbuf, &stat);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
34
69.39%
1
33.33%
Al Viro
15
30.61%
2
66.67%
Total
49
100.00%
3
100.00%



asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename,
			      struct stat64 __user *statbuf, int flag)
{
	struct kstat stat;
	int error;

	error = vfs_fstatat(dfd, filename, &stat, flag);
	if (error)
		return error;
	return cp_stat64(statbuf, &stat);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ulrich Drepper
56
90.32%
1
33.33%
Oleg Drokin
5
8.06%
1
33.33%
David Howells
1
1.61%
1
33.33%
Total
62
100.00%
3
100.00%

/*
 * 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_struct32 {
	
unsigned int addr;
	
unsigned int len;
	
unsigned int prot;
	
unsigned int flags;
	
unsigned int fd;
	
unsigned int offset;
};



asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
{
	struct mmap_arg_struct32 a;

	if (copy_from_user(&a, arg, sizeof(a)))
		return -EFAULT;

	if (a.offset & ~PAGE_MASK)
		return -EINVAL;

	return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
			       a.offset>>PAGE_SHIFT);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
70
89.74%
2
40.00%
Al Viro
6
7.69%
2
40.00%
Christoph Hellwig
2
2.56%
1
20.00%
Total
78
100.00%
5
100.00%



asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
			      int options)
{
	return compat_sys_wait4(pid, stat_addr, options, NULL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pu Long
27
90.00%
1
33.33%
Andi Kleen
2
6.67%
1
33.33%
Mathias Krause
1
3.33%
1
33.33%
Total
30
100.00%
3
100.00%

/* warning: next two assume little endian */


asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
			    u32 poslo, u32 poshi)
{
	return sys_pread64(fd, ubuf, count,
			 ((loff_t)AA(poshi) << 32) | AA(poslo));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
49
96.08%
3
60.00%
Al Viro
1
1.96%
1
20.00%
Linus Torvalds
1
1.96%
1
20.00%
Total
51
100.00%
5
100.00%



asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
			     u32 count, u32 poslo, u32 poshi)
{
	return sys_pwrite64(fd, ubuf, count,
			  ((loff_t)AA(poshi) << 32) | AA(poslo));
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
49
94.23%
3
50.00%
Linus Torvalds
1
1.92%
1
16.67%
David Howells
1
1.92%
1
16.67%
Al Viro
1
1.92%
1
16.67%
Total
52
100.00%
6
100.00%

/*
 * Some system calls that need sign extended arguments. This could be
 * done by a generic wrapper.
 */


long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
			__u32 len_low, __u32 len_high, int advice)
{
	return sys_fadvise64_64(fd,
			       (((u64)offset_high)<<32) | offset_low,
			       (((u64)len_high)<<32) | len_low,
				advice);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
57
100.00%
1
100.00%
Total
57
100.00%
1
100.00%



asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
				   size_t count)
{
	return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
37
100.00%
1
100.00%
Total
37
100.00%
1
100.00%



asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
				      unsigned n_low, unsigned n_hi,  int flags)
{
	return sys_sync_file_range(fd,
				   ((u64)off_hi << 32) | off_low,
				   ((u64)n_hi << 32) | n_low, flags);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
54
100.00%
1
100.00%
Total
54
100.00%
1
100.00%



asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
				size_t len, int advice)
{
	return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
				len, advice);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
42
100.00%
1
100.00%
Total
42
100.00%
1
100.00%



asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
				unsigned offset_hi, unsigned len_lo,
				unsigned len_hi)
{
	return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
			     ((u64)len_hi << 32) | len_lo);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Amit Arora
54
100.00%
1
100.00%
Total
54
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Andi Kleen
797
68.47%
8
25.00%
Al Viro
110
9.45%
4
12.50%
Andrew Morton
73
6.27%
2
6.25%
Ulrich Drepper
56
4.81%
1
3.12%
Amit Arora
54
4.64%
1
3.12%
Pu Long
27
2.32%
1
3.12%
Eric W. Biedermann
12
1.03%
1
3.12%
Christoph Hellwig
6
0.52%
2
6.25%
Oleg Drokin
5
0.43%
1
3.12%
David Howells
5
0.43%
1
3.12%
Linus Torvalds
3
0.26%
2
6.25%
Daniel Jacobowitz
3
0.26%
1
3.12%
Thomas Gleixner
3
0.26%
1
3.12%
Tejun Heo
3
0.26%
1
3.12%
Jesper Juhl
2
0.17%
1
3.12%
Jaswinder Singh Rajput
2
0.17%
1
3.12%
Mathias Krause
1
0.09%
1
3.12%
Arun Sharma
1
0.09%
1
3.12%
Greg Kroah-Hartman
1
0.09%
1
3.12%
Total
1164
100.00%
32
100.00%
Directory: arch/x86/ia32

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.