1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
4 *
5 * Copyright (C) 2001 IBM
6 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
8 *
9 * These routines maintain argument size conversion between 32bit and 64bit
10 * environment.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/fs.h>
16 #include <linux/mm.h>
17 #include <linux/file.h>
18 #include <linux/signal.h>
19 #include <linux/resource.h>
20 #include <linux/times.h>
21 #include <linux/smp.h>
22 #include <linux/sem.h>
23 #include <linux/msg.h>
24 #include <linux/shm.h>
25 #include <linux/poll.h>
26 #include <linux/personality.h>
27 #include <linux/stat.h>
28 #include <linux/mman.h>
29 #include <linux/in.h>
30 #include <linux/syscalls.h>
31 #include <linux/unistd.h>
32 #include <linux/sysctl.h>
33 #include <linux/binfmts.h>
34 #include <linux/security.h>
35 #include <linux/compat.h>
36 #include <linux/ptrace.h>
37 #include <linux/elf.h>
38 #include <linux/ipc.h>
39 #include <linux/slab.h>
40
41 #include <asm/ptrace.h>
42 #include <asm/types.h>
43 #include <linux/uaccess.h>
44 #include <asm/unistd.h>
45 #include <asm/time.h>
46 #include <asm/mmu_context.h>
47 #include <asm/ppc-pci.h>
48 #include <asm/syscalls.h>
49 #include <asm/switch_to.h>
50
compat_sys_mmap2(unsigned long addr,size_t len,unsigned long prot,unsigned long flags,unsigned long fd,unsigned long pgoff)51 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
52 unsigned long prot, unsigned long flags,
53 unsigned long fd, unsigned long pgoff)
54 {
55 /* This should remain 12 even if PAGE_SIZE changes */
56 return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
57 }
58
compat_sys_pread64(unsigned int fd,char __user * ubuf,compat_size_t count,u32 reg6,u32 pos1,u32 pos2)59 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
60 u32 reg6, u32 pos1, u32 pos2)
61 {
62 return ksys_pread64(fd, ubuf, count, merge_64(pos1, pos2));
63 }
64
compat_sys_pwrite64(unsigned int fd,const char __user * ubuf,compat_size_t count,u32 reg6,u32 pos1,u32 pos2)65 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
66 u32 reg6, u32 pos1, u32 pos2)
67 {
68 return ksys_pwrite64(fd, ubuf, count, merge_64(pos1, pos2));
69 }
70
compat_sys_readahead(int fd,u32 r4,u32 offset1,u32 offset2,u32 count)71 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offset1, u32 offset2, u32 count)
72 {
73 return ksys_readahead(fd, merge_64(offset1, offset2), count);
74 }
75
compat_sys_truncate64(const char __user * path,u32 reg4,unsigned long len1,unsigned long len2)76 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
77 unsigned long len1, unsigned long len2)
78 {
79 return ksys_truncate(path, merge_64(len1, len2));
80 }
81
compat_sys_fallocate(int fd,int mode,u32 offset1,u32 offset2,u32 len1,u32 len2)82 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offset1, u32 offset2,
83 u32 len1, u32 len2)
84 {
85 return ksys_fallocate(fd, mode, merge_64(offset1, offset2),
86 merge_64(len1, len2));
87 }
88
compat_sys_ftruncate64(unsigned int fd,u32 reg4,unsigned long len1,unsigned long len2)89 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long len1,
90 unsigned long len2)
91 {
92 return ksys_ftruncate(fd, merge_64(len1, len2));
93 }
94
ppc32_fadvise64(int fd,u32 unused,u32 offset1,u32 offset2,size_t len,int advice)95 long ppc32_fadvise64(int fd, u32 unused, u32 offset1, u32 offset2,
96 size_t len, int advice)
97 {
98 return ksys_fadvise64_64(fd, merge_64(offset1, offset2), len,
99 advice);
100 }
101
compat_sys_sync_file_range2(int fd,unsigned int flags,unsigned offset1,unsigned offset2,unsigned nbytes1,unsigned nbytes2)102 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
103 unsigned offset1, unsigned offset2,
104 unsigned nbytes1, unsigned nbytes2)
105 {
106 loff_t offset = merge_64(offset1, offset2);
107 loff_t nbytes = merge_64(nbytes1, nbytes2);
108
109 return ksys_sync_file_range(fd, offset, nbytes, flags);
110 }
111