sys_ppc32.c (4899a36f91a9f9b06878471096bd143e7253006d) sys_ppc32.c (e237506238352f3bfa9cf3983cdab873e35651eb)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
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 *
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.
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.
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>

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42#include <linux/uaccess.h>
43#include <asm/unistd.h>
44#include <asm/time.h>
45#include <asm/mmu_context.h>
46#include <asm/ppc-pci.h>
47#include <asm/syscalls.h>
48#include <asm/switch_to.h>
49
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>

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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
50COMPAT_SYSCALL_DEFINE6(ppc_pread64,
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,
51 unsigned int, fd,
52 char __user *, ubuf, compat_size_t, count,
53 u32, reg6, u32, pos1, u32, pos2)
54{
55 return ksys_pread64(fd, ubuf, count, merge_64(pos1, pos2));
56}
57
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
58COMPAT_SYSCALL_DEFINE6(ppc_pwrite64,
78PPC32_SYSCALL_DEFINE6(ppc_pwrite64,
59 unsigned int, fd,
60 const char __user *, ubuf, compat_size_t, count,
61 u32, reg6, u32, pos1, u32, pos2)
62{
63 return ksys_pwrite64(fd, ubuf, count, merge_64(pos1, pos2));
64}
65
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
66COMPAT_SYSCALL_DEFINE5(ppc_readahead,
86PPC32_SYSCALL_DEFINE5(ppc_readahead,
67 int, fd, u32, r4,
68 u32, offset1, u32, offset2, u32, count)
69{
70 return ksys_readahead(fd, merge_64(offset1, offset2), count);
71}
72
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
73COMPAT_SYSCALL_DEFINE4(ppc_truncate64,
93PPC32_SYSCALL_DEFINE4(ppc_truncate64,
74 const char __user *, path, u32, reg4,
75 unsigned long, len1, unsigned long, len2)
76{
77 return ksys_truncate(path, merge_64(len1, len2));
78}
79
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
80COMPAT_SYSCALL_DEFINE4(ppc_ftruncate64,
100PPC32_SYSCALL_DEFINE4(ppc_ftruncate64,
81 unsigned int, fd, u32, reg4,
82 unsigned long, len1, unsigned long, len2)
83{
84 return ksys_ftruncate(fd, merge_64(len1, len2));
85}
86
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
87COMPAT_SYSCALL_DEFINE6(ppc32_fadvise64,
107PPC32_SYSCALL_DEFINE6(ppc32_fadvise64,
88 int, fd, u32, unused, u32, offset1, u32, offset2,
89 size_t, len, int, advice)
90{
91 return ksys_fadvise64_64(fd, merge_64(offset1, offset2), len,
92 advice);
93}
94
95COMPAT_SYSCALL_DEFINE6(ppc_sync_file_range2,
96 int, fd, unsigned int, flags,
97 unsigned int, offset1, unsigned int, offset2,
98 unsigned int, nbytes1, unsigned int, nbytes2)
99{
100 loff_t offset = merge_64(offset1, offset2);
101 loff_t nbytes = merge_64(nbytes1, nbytes2);
102
103 return ksys_sync_file_range(fd, offset, nbytes, flags);
104}
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
115COMPAT_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}