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