Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *             sys_sparc32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2000		VA Linux Co
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright (C) 2000		Don Dugger <n0ano@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright (C) 1999		Arun Sharma <arun.sharma@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Copyright (C) 1997,1998	Jakub Jelinek (jj@sunsite.mff.cuni.cz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Copyright (C) 1997		David S. Miller (davem@caip.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * Copyright (C) 2000		Hewlett-Packard Co.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Copyright (C) 2000		David Mosberger-Tang <davidm@hpl.hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Copyright (C) 2000,2001,2002	Andi Kleen, SuSE Labs (x86-64 port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * These routines maintain argument size conversion between 32bit and 64bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * environment. In 2.5 most of this should be moved to a generic directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * This file assumes that there is a hole at the end of user address space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * Some of the functions are LE specific currently. These are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * hopefully all marked.  This should be fixed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/times.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/utsname.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/uio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <linux/personality.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #include <linux/highuid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #include <linux/sched/task.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #include <asm/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #include <asm/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #include <asm/vgtod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #include <asm/ia32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define AA(__x)		((unsigned long)(__x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) SYSCALL_DEFINE3(ia32_truncate64, const char __user *, filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		unsigned long, offset_low, unsigned long, offset_high)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	return ksys_truncate(filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			    ((loff_t) offset_high << 32) | offset_low);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) SYSCALL_DEFINE3(ia32_ftruncate64, unsigned int, fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		unsigned long, offset_low, unsigned long, offset_high)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	return ksys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) /* warning: next two assume little endian */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) SYSCALL_DEFINE5(ia32_pread64, unsigned int, fd, char __user *, ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		u32, count, u32, poslo, u32, poshi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	return ksys_pread64(fd, ubuf, count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			    ((loff_t)AA(poshi) << 32) | AA(poslo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) SYSCALL_DEFINE5(ia32_pwrite64, unsigned int, fd, const char __user *, ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		u32, count, u32, poslo, u32, poshi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return ksys_pwrite64(fd, ubuf, count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			     ((loff_t)AA(poshi) << 32) | AA(poslo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  * Some system calls that need sign extended arguments. This could be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  * done by a generic wrapper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) SYSCALL_DEFINE6(ia32_fadvise64_64, int, fd, __u32, offset_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		__u32, offset_high, __u32, len_low, __u32, len_high,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		int, advice)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	return ksys_fadvise64_64(fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 				 (((u64)offset_high)<<32) | offset_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 				 (((u64)len_high)<<32) | len_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				 advice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) SYSCALL_DEFINE4(ia32_readahead, int, fd, unsigned int, off_lo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		unsigned int, off_hi, size_t, count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	return ksys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) SYSCALL_DEFINE6(ia32_sync_file_range, int, fd, unsigned int, off_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		unsigned int, off_hi, unsigned int, n_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		unsigned int, n_hi, int, flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	return ksys_sync_file_range(fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 				    ((u64)off_hi << 32) | off_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 				    ((u64)n_hi << 32) | n_low, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) SYSCALL_DEFINE5(ia32_fadvise64, int, fd, unsigned int, offset_lo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		unsigned int, offset_hi, size_t, len, int, advice)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	return ksys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 				 len, advice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) SYSCALL_DEFINE6(ia32_fallocate, int, fd, int, mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		unsigned int, offset_lo, unsigned int, offset_hi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		unsigned int, len_lo, unsigned int, len_hi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	return ksys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			      ((u64)len_hi << 32) | len_lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #ifdef CONFIG_IA32_EMULATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)  * Another set for IA32/LFS -- x86_64 struct stat is different due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  * support for 64bit inode numbers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	typeof(ubuf->st_uid) uid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	typeof(ubuf->st_gid) gid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (!user_write_access_begin(ubuf, sizeof(struct stat64)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	unsafe_put_user(huge_encode_dev(stat->dev), &ubuf->st_dev, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	unsafe_put_user(stat->ino, &ubuf->__st_ino, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	unsafe_put_user(stat->ino, &ubuf->st_ino, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	unsafe_put_user(stat->mode, &ubuf->st_mode, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	unsafe_put_user(stat->nlink, &ubuf->st_nlink, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	unsafe_put_user(uid, &ubuf->st_uid, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	unsafe_put_user(gid, &ubuf->st_gid, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	unsafe_put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	unsafe_put_user(stat->size, &ubuf->st_size, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	unsafe_put_user(stat->atime.tv_sec, &ubuf->st_atime, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	unsafe_put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	unsafe_put_user(stat->mtime.tv_sec, &ubuf->st_mtime, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	unsafe_put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	unsafe_put_user(stat->ctime.tv_sec, &ubuf->st_ctime, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	unsafe_put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	unsafe_put_user(stat->blksize, &ubuf->st_blksize, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	unsafe_put_user(stat->blocks, &ubuf->st_blocks, Efault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	user_access_end();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) Efault:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	user_write_access_end();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) COMPAT_SYSCALL_DEFINE2(ia32_stat64, const char __user *, filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		       struct stat64 __user *, statbuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct kstat stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	int ret = vfs_stat(filename, &stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		ret = cp_stat64(statbuf, &stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) COMPAT_SYSCALL_DEFINE2(ia32_lstat64, const char __user *, filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		       struct stat64 __user *, statbuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	struct kstat stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	int ret = vfs_lstat(filename, &stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		ret = cp_stat64(statbuf, &stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) COMPAT_SYSCALL_DEFINE2(ia32_fstat64, unsigned int, fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		       struct stat64 __user *, statbuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	struct kstat stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	int ret = vfs_fstat(fd, &stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		ret = cp_stat64(statbuf, &stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) COMPAT_SYSCALL_DEFINE4(ia32_fstatat64, unsigned int, dfd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		       const char __user *, filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		       struct stat64 __user *, statbuf, int, flag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	struct kstat stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	error = vfs_fstatat(dfd, filename, &stat, flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	return cp_stat64(statbuf, &stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)  * Linux/i386 didn't use to be able to handle more than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)  * 4 system call parameters, so these system calls used a memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)  * block for parameter passing..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct mmap_arg_struct32 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	unsigned int addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	unsigned int prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	unsigned int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	unsigned int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) COMPAT_SYSCALL_DEFINE1(ia32_mmap, struct mmap_arg_struct32 __user *, arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	struct mmap_arg_struct32 a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (copy_from_user(&a, arg, sizeof(a)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (a.offset & ~PAGE_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 			       a.offset>>PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * The 32-bit clone ABI is CONFIG_CLONE_BACKWARDS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) COMPAT_SYSCALL_DEFINE5(ia32_clone, unsigned long, clone_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		       unsigned long, newsp, int __user *, parent_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		       unsigned long, tls_val, int __user *, child_tidptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	struct kernel_clone_args args = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		.flags		= (clone_flags & ~CSIGNAL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		.pidfd		= parent_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		.child_tid	= child_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		.parent_tid	= parent_tidptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		.exit_signal	= (clone_flags & CSIGNAL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		.stack		= newsp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		.tls		= tls_val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	return kernel_clone(&args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #endif /* CONFIG_IA32_EMULATION */