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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * sys_ppc32.c: 32-bit system calls with complex calling conventions.
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 * 32-bit system calls with 64-bit arguments pass those in register pairs.
10 * This must be specially dealt with on 64-bit kernels. The compat_arg_u64_dual
11 * in generic compat syscalls is not always usable because the register
12 * pairing is constrained depending on preceding arguments.
13 *
14 * An analogous problem exists on 32-bit kernels with ARCH_HAS_SYSCALL_WRAPPER,
15 * the defined system call functions take the pt_regs as an argument, and there
16 * is a mapping macro which maps registers to arguments
17 * (SC_POWERPC_REGS_TO_ARGS) which also does not deal with these 64-bit
18 * arguments.
19 *
20 * This file contains these system calls.
21 */
22
23#include <linux/kernel.h>
24#include <linux/sched.h>
25#include <linux/fs.h>
26#include <linux/mm.h>
27#include <linux/file.h>
28#include <linux/signal.h>
29#include <linux/resource.h>
30#include <linux/times.h>
31#include <linux/smp.h>
32#include <linux/sem.h>
33#include <linux/msg.h>
34#include <linux/shm.h>
35#include <linux/poll.h>
36#include <linux/personality.h>
37#include <linux/stat.h>
38#include <linux/in.h>
39#include <linux/syscalls.h>
40#include <linux/unistd.h>
41#include <linux/sysctl.h>
42#include <linux/binfmts.h>
43#include <linux/security.h>
44#include <linux/compat.h>
45#include <linux/ptrace.h>
46#include <linux/elf.h>
47#include <linux/ipc.h>
48#include <linux/slab.h>
49
50#include <asm/ptrace.h>
51#include <asm/types.h>
52#include <linux/uaccess.h>
53#include <asm/unistd.h>
54#include <asm/time.h>
55#include <asm/mmu_context.h>
56#include <asm/ppc-pci.h>
57#include <asm/syscalls.h>
58#include <asm/switch_to.h>
59
60#ifdef CONFIG_PPC32
61#define PPC32_SYSCALL_DEFINE4 SYSCALL_DEFINE4
62#define PPC32_SYSCALL_DEFINE5 SYSCALL_DEFINE5
63#define PPC32_SYSCALL_DEFINE6 SYSCALL_DEFINE6
64#else
65#define PPC32_SYSCALL_DEFINE4 COMPAT_SYSCALL_DEFINE4
66#define PPC32_SYSCALL_DEFINE5 COMPAT_SYSCALL_DEFINE5
67#define PPC32_SYSCALL_DEFINE6 COMPAT_SYSCALL_DEFINE6
68#endif
69
70PPC32_SYSCALL_DEFINE6(ppc_pread64,
71 unsigned int, fd,
72 char __user *, ubuf, compat_size_t, count,
73 u32, reg6, u32, pos1, u32, pos2)
74{
75 return ksys_pread64(fd, ubuf, count, merge_64(pos1, pos2));
76}
77
78PPC32_SYSCALL_DEFINE6(ppc_pwrite64,
79 unsigned int, fd,
80 const char __user *, ubuf, compat_size_t, count,
81 u32, reg6, u32, pos1, u32, pos2)
82{
83 return ksys_pwrite64(fd, ubuf, count, merge_64(pos1, pos2));
84}
85
86PPC32_SYSCALL_DEFINE5(ppc_readahead,
87 int, fd, u32, r4,
88 u32, offset1, u32, offset2, u32, count)
89{
90 return ksys_readahead(fd, merge_64(offset1, offset2), count);
91}
92
93PPC32_SYSCALL_DEFINE4(ppc_truncate64,
94 const char __user *, path, u32, reg4,
95 unsigned long, len1, unsigned long, len2)
96{
97 return ksys_truncate(path, merge_64(len1, len2));
98}
99
100PPC32_SYSCALL_DEFINE4(ppc_ftruncate64,
101 unsigned int, fd, u32, reg4,
102 unsigned long, len1, unsigned long, len2)
103{
104 return ksys_ftruncate(fd, merge_64(len1, len2));
105}
106
107PPC32_SYSCALL_DEFINE6(ppc32_fadvise64,
108 int, fd, u32, unused, u32, offset1, u32, offset2,
109 size_t, len, int, advice)
110{
111 return ksys_fadvise64_64(fd, merge_64(offset1, offset2), len,
112 advice);
113}
114
115PPC32_SYSCALL_DEFINE6(ppc_sync_file_range2,
116 int, fd, unsigned int, flags,
117 unsigned int, offset1, unsigned int, offset2,
118 unsigned int, nbytes1, unsigned int, nbytes2)
119{
120 loff_t offset = merge_64(offset1, offset2);
121 loff_t nbytes = merge_64(nbytes1, nbytes2);
122
123 return ksys_sync_file_range(fd, offset, nbytes, flags);
124}
125
126#ifdef CONFIG_PPC32
127SYSCALL_DEFINE6(ppc_fallocate,
128 int, fd, int, mode,
129 u32, offset1, u32, offset2, u32, len1, u32, len2)
130{
131 return ksys_fallocate(fd, mode,
132 merge_64(offset1, offset2),
133 merge_64(len1, len2));
134}
135#endif
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
51unsigned 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
59/*
60 * long long munging:
61 * The 32 bit ABI passes long longs in an odd even register pair.
62 * High and low parts are swapped depending on endian mode,
63 * so define a macro (similar to mips linux32) to handle that.
64 */
65#ifdef __LITTLE_ENDIAN__
66#define merge_64(low, high) ((u64)high << 32) | low
67#else
68#define merge_64(high, low) ((u64)high << 32) | low
69#endif
70
71compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
72 u32 reg6, u32 pos1, u32 pos2)
73{
74 return ksys_pread64(fd, ubuf, count, merge_64(pos1, pos2));
75}
76
77compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
78 u32 reg6, u32 pos1, u32 pos2)
79{
80 return ksys_pwrite64(fd, ubuf, count, merge_64(pos1, pos2));
81}
82
83compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offset1, u32 offset2, u32 count)
84{
85 return ksys_readahead(fd, merge_64(offset1, offset2), count);
86}
87
88asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
89 unsigned long len1, unsigned long len2)
90{
91 return ksys_truncate(path, merge_64(len1, len2));
92}
93
94asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offset1, u32 offset2,
95 u32 len1, u32 len2)
96{
97 return ksys_fallocate(fd, mode, ((loff_t)offset1 << 32) | offset2,
98 merge_64(len1, len2));
99}
100
101asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long len1,
102 unsigned long len2)
103{
104 return ksys_ftruncate(fd, merge_64(len1, len2));
105}
106
107long ppc32_fadvise64(int fd, u32 unused, u32 offset1, u32 offset2,
108 size_t len, int advice)
109{
110 return ksys_fadvise64_64(fd, merge_64(offset1, offset2), len,
111 advice);
112}
113
114asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
115 unsigned offset1, unsigned offset2,
116 unsigned nbytes1, unsigned nbytes2)
117{
118 loff_t offset = merge_64(offset1, offset2);
119 loff_t nbytes = merge_64(nbytes1, nbytes2);
120
121 return ksys_sync_file_range(fd, offset, nbytes, flags);
122}