mirror of https://gitee.com/openkylin/linux.git
163 lines
4.4 KiB
C
163 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Conversion between 32-bit and 64-bit native system calls.
|
|
*
|
|
* Copyright (C) 2000 Silicon Graphics, Inc.
|
|
* Written by Ulf Carlsson (ulfc@engr.sgi.com)
|
|
*/
|
|
#include <linux/compiler.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/file.h>
|
|
#include <linux/highuid.h>
|
|
#include <linux/resource.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/time.h>
|
|
#include <linux/times.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/filter.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/icmpv6.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/utime.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/personality.h>
|
|
#include <linux/dnotify.h>
|
|
#include <linux/binfmts.h>
|
|
#include <linux/security.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/vfs.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <net/sock.h>
|
|
#include <net/scm.h>
|
|
|
|
#include <asm/compat-signal.h>
|
|
#include <asm/sim.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/mman.h>
|
|
|
|
/* Use this to get at 32-bit user passed pointers. */
|
|
/* A() macro should be used for places where you e.g.
|
|
have some internal variable u32 and just want to get
|
|
rid of a compiler warning. AA() has to be used in
|
|
places where you want to convert a function argument
|
|
to 32bit pointer or when you e.g. access pt_regs
|
|
structure and want to consider 32bit registers only.
|
|
*/
|
|
#define A(__x) ((unsigned long)(__x))
|
|
#define AA(__x) ((unsigned long)((int)__x))
|
|
|
|
#ifdef __MIPSEB__
|
|
#define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
|
|
#endif
|
|
#ifdef __MIPSEL__
|
|
#define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
|
|
#endif
|
|
|
|
SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
|
|
unsigned long, prot, unsigned long, flags, unsigned long, fd,
|
|
unsigned long, pgoff)
|
|
{
|
|
if (pgoff & (~PAGE_MASK >> 12))
|
|
return -EINVAL;
|
|
return ksys_mmap_pgoff(addr, len, prot, flags, fd,
|
|
pgoff >> (PAGE_SHIFT-12));
|
|
}
|
|
|
|
#define RLIM_INFINITY32 0x7fffffff
|
|
#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
|
|
|
|
struct rlimit32 {
|
|
int rlim_cur;
|
|
int rlim_max;
|
|
};
|
|
|
|
SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
|
|
unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
|
|
{
|
|
return ksys_truncate(path, merge_64(a2, a3));
|
|
}
|
|
|
|
SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
|
|
unsigned long, a2, unsigned long, a3)
|
|
{
|
|
return ksys_ftruncate(fd, merge_64(a2, a3));
|
|
}
|
|
|
|
SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
|
|
unsigned int, offset_low, loff_t __user *, result,
|
|
unsigned int, origin)
|
|
{
|
|
return sys_llseek(fd, offset_high, offset_low, result, origin);
|
|
}
|
|
|
|
/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
|
|
lseek back to original location. They fail just like lseek does on
|
|
non-seekable files. */
|
|
|
|
SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
|
|
unsigned long, unused, unsigned long, a4, unsigned long, a5)
|
|
{
|
|
return ksys_pread64(fd, buf, count, merge_64(a4, a5));
|
|
}
|
|
|
|
SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
|
|
size_t, count, u32, unused, u64, a4, u64, a5)
|
|
{
|
|
return ksys_pwrite64(fd, buf, count, merge_64(a4, a5));
|
|
}
|
|
|
|
SYSCALL_DEFINE1(32_personality, unsigned long, personality)
|
|
{
|
|
unsigned int p = personality & 0xffffffff;
|
|
int ret;
|
|
|
|
if (personality(current->personality) == PER_LINUX32 &&
|
|
personality(p) == PER_LINUX)
|
|
p = (p & ~PER_MASK) | PER_LINUX32;
|
|
ret = sys_personality(p);
|
|
if (ret != -1 && personality(ret) == PER_LINUX32)
|
|
ret = (ret & ~PER_MASK) | PER_LINUX;
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
|
|
size_t count)
|
|
{
|
|
return ksys_readahead(fd, merge_64(a2, a3), count);
|
|
}
|
|
|
|
asmlinkage long sys32_sync_file_range(int fd, int __pad,
|
|
unsigned long a2, unsigned long a3,
|
|
unsigned long a4, unsigned long a5,
|
|
int flags)
|
|
{
|
|
return ksys_sync_file_range(fd,
|
|
merge_64(a2, a3), merge_64(a4, a5),
|
|
flags);
|
|
}
|
|
|
|
asmlinkage long sys32_fadvise64_64(int fd, int __pad,
|
|
unsigned long a2, unsigned long a3,
|
|
unsigned long a4, unsigned long a5,
|
|
int flags)
|
|
{
|
|
return ksys_fadvise64_64(fd,
|
|
merge_64(a2, a3), merge_64(a4, a5),
|
|
flags);
|
|
}
|
|
|
|
asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
|
|
unsigned offset_a3, unsigned len_a4, unsigned len_a5)
|
|
{
|
|
return ksys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
|
|
merge_64(len_a4, len_a5));
|
|
}
|