// 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 <[email protected]> * Copyright (C) 1999 Arun Sharma <[email protected]> * Copyright (C) 1997,1998 Jakub Jelinek ([email protected]) * Copyright (C) 1997 David S. Miller ([email protected]) * Copyright (C) 2000 Hewlett-Packard Co. * Copyright (C) 2000 David Mosberger-Tang <[email protected]> * 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 <linux/sched/task.h> #include <asm/mman.h> #include <asm/types.h> #include <linux/uaccess.h> #include <linux/atomic.h> #include <asm/vgtod.h> #include <asm/ia32.h> #define AA(__x) … SYSCALL_DEFINE3(ia32_truncate64, const char __user *, filename, unsigned long, offset_low, unsigned long, offset_high) { … } SYSCALL_DEFINE3(ia32_ftruncate64, unsigned int, fd, unsigned long, offset_low, unsigned long, offset_high) { … } /* warning: next two assume little endian */ SYSCALL_DEFINE5(ia32_pread64, unsigned int, fd, char __user *, ubuf, u32, count, u32, poslo, u32, poshi) { … } SYSCALL_DEFINE5(ia32_pwrite64, unsigned int, fd, const char __user *, ubuf, u32, count, u32, poslo, u32, poshi) { … } /* * Some system calls that need sign extended arguments. This could be * done by a generic wrapper. */ SYSCALL_DEFINE6(ia32_fadvise64_64, int, fd, __u32, offset_low, __u32, offset_high, __u32, len_low, __u32, len_high, int, advice) { … } SYSCALL_DEFINE4(ia32_readahead, int, fd, unsigned int, off_lo, unsigned int, off_hi, size_t, count) { … } SYSCALL_DEFINE6(ia32_sync_file_range, int, fd, unsigned int, off_low, unsigned int, off_hi, unsigned int, n_low, unsigned int, n_hi, int, flags) { … } SYSCALL_DEFINE5(ia32_fadvise64, int, fd, unsigned int, offset_lo, unsigned int, offset_hi, size_t, len, int, advice) { … } SYSCALL_DEFINE6(ia32_fallocate, int, fd, int, mode, unsigned int, offset_lo, unsigned int, offset_hi, unsigned int, len_lo, unsigned int, len_hi) { … } #ifdef CONFIG_IA32_EMULATION /* * 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) { … } COMPAT_SYSCALL_DEFINE2(ia32_stat64, const char __user *, filename, struct stat64 __user *, statbuf) { … } COMPAT_SYSCALL_DEFINE2(ia32_lstat64, const char __user *, filename, struct stat64 __user *, statbuf) { … } COMPAT_SYSCALL_DEFINE2(ia32_fstat64, unsigned int, fd, struct stat64 __user *, statbuf) { … } COMPAT_SYSCALL_DEFINE4(ia32_fstatat64, unsigned int, dfd, const char __user *, filename, struct stat64 __user *, statbuf, int, flag) { … } /* * 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 { … }; COMPAT_SYSCALL_DEFINE1(ia32_mmap, struct mmap_arg_struct32 __user *, arg) { … } /* * The 32-bit clone ABI is CONFIG_CLONE_BACKWARDS */ COMPAT_SYSCALL_DEFINE5(ia32_clone, unsigned long, clone_flags, unsigned long, newsp, int __user *, parent_tidptr, unsigned long, tls_val, int __user *, child_tidptr) { … } #endif /* CONFIG_IA32_EMULATION */
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