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review.trustedfirmware.org / hafnium / third_party / linux.git / 157378f43faad830e4aa3815bde5fa9f9a9f5be6 / . / arch / powerpc / include / asm / compat.h
blob: 9191fc29e6ed11e4d183e09125f6cb73e0dd7943 [file] [log] [blame]
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_COMPAT_H
3#define _ASM_POWERPC_COMPAT_H
4#ifdef __KERNEL__
5/*
6 * Architecture specific compatibility types
7 */
8#include <linux/types.h>
9#include <linux/sched.h>
10
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]11#include <asm-generic/compat.h>
12
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]13#define COMPAT_USER_HZ 100
14#ifdef __BIG_ENDIAN__
15#define COMPAT_UTS_MACHINE "ppc\0\0"
16#else
17#define COMPAT_UTS_MACHINE "ppcle\0\0"
18#endif
19
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]20typedef u32 __compat_uid_t;
21typedef u32 __compat_gid_t;
22typedef u32 __compat_uid32_t;
23typedef u32 __compat_gid32_t;
24typedef u32 compat_mode_t;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]25typedef u32 compat_dev_t;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]26typedef s16 compat_nlink_t;
27typedef u16 compat_ipc_pid_t;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]28typedef u32 compat_caddr_t;
29typedef __kernel_fsid_t compat_fsid_t;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]30
31struct compat_stat {
32 compat_dev_t st_dev;
33 compat_ino_t st_ino;
34 compat_mode_t st_mode;
35 compat_nlink_t st_nlink;
36 __compat_uid32_t st_uid;
37 __compat_gid32_t st_gid;
38 compat_dev_t st_rdev;
39 compat_off_t st_size;
40 compat_off_t st_blksize;
41 compat_off_t st_blocks;
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]42 old_time32_t st_atime;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]43 u32 st_atime_nsec;
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]44 old_time32_t st_mtime;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]45 u32 st_mtime_nsec;
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]46 old_time32_t st_ctime;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]47 u32 st_ctime_nsec;
48 u32 __unused4[2];
49};
50
51struct compat_flock {
52 short l_type;
53 short l_whence;
54 compat_off_t l_start;
55 compat_off_t l_len;
56 compat_pid_t l_pid;
57};
58
59#define F_GETLK64 12 /* using 'struct flock64' */
60#define F_SETLK64 13
61#define F_SETLKW64 14
62
63struct compat_flock64 {
64 short l_type;
65 short l_whence;
66 compat_loff_t l_start;
67 compat_loff_t l_len;
68 compat_pid_t l_pid;
69};
70
71struct compat_statfs {
72 int f_type;
73 int f_bsize;
74 int f_blocks;
75 int f_bfree;
76 int f_bavail;
77 int f_files;
78 int f_ffree;
79 compat_fsid_t f_fsid;
80 int f_namelen; /* SunOS ignores this field. */
81 int f_frsize;
82 int f_flags;
83 int f_spare[4];
84};
85
86#define COMPAT_RLIM_INFINITY 0xffffffff
87
88typedef u32 compat_old_sigset_t;
89
90#define _COMPAT_NSIG 64
91#define _COMPAT_NSIG_BPW 32
92
93typedef u32 compat_sigset_word;
94
95#define COMPAT_OFF_T_MAX 0x7fffffff
96
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]97static inline void __user *arch_compat_alloc_user_space(long len)
98{
99 struct pt_regs *regs = current->thread.regs;
100 unsigned long usp = regs->gpr[1];
101
102 /*
103 * We can't access below the stack pointer in the 32bit ABI and
104 * can access 288 bytes in the 64bit big-endian ABI,
105 * or 512 bytes with the new ELFv2 little-endian ABI.
106 */
107 if (!is_32bit_task())
108 usp -= USER_REDZONE_SIZE;
109
110 return (void __user *) (usp - len);
111}
112
113/*
114 * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
115 * it we may as well define it.
116 */
117struct compat_ipc64_perm {
118 compat_key_t key;
119 __compat_uid_t uid;
120 __compat_gid_t gid;
121 __compat_uid_t cuid;
122 __compat_gid_t cgid;
123 compat_mode_t mode;
124 unsigned int seq;
125 unsigned int __pad2;
126 unsigned long __unused1; /* yes they really are 64bit pads */
127 unsigned long __unused2;
128};
129
130struct compat_semid64_ds {
131 struct compat_ipc64_perm sem_perm;
132 unsigned int sem_otime_high;
133 unsigned int sem_otime;
134 unsigned int sem_ctime_high;
135 unsigned int sem_ctime;
136 compat_ulong_t sem_nsems;
137 compat_ulong_t __unused3;
138 compat_ulong_t __unused4;
139};
140
141struct compat_msqid64_ds {
142 struct compat_ipc64_perm msg_perm;
143 unsigned int msg_stime_high;
144 unsigned int msg_stime;
145 unsigned int msg_rtime_high;
146 unsigned int msg_rtime;
147 unsigned int msg_ctime_high;
148 unsigned int msg_ctime;
149 compat_ulong_t msg_cbytes;
150 compat_ulong_t msg_qnum;
151 compat_ulong_t msg_qbytes;
152 compat_pid_t msg_lspid;
153 compat_pid_t msg_lrpid;
154 compat_ulong_t __unused4;
155 compat_ulong_t __unused5;
156};
157
158struct compat_shmid64_ds {
159 struct compat_ipc64_perm shm_perm;
160 unsigned int shm_atime_high;
161 unsigned int shm_atime;
162 unsigned int shm_dtime_high;
163 unsigned int shm_dtime;
164 unsigned int shm_ctime_high;
165 unsigned int shm_ctime;
166 unsigned int __unused4;
167 compat_size_t shm_segsz;
168 compat_pid_t shm_cpid;
169 compat_pid_t shm_lpid;
170 compat_ulong_t shm_nattch;
171 compat_ulong_t __unused5;
172 compat_ulong_t __unused6;
173};
174
175static inline int is_compat_task(void)
176{
177 return is_32bit_task();
178}
179
180#endif /* __KERNEL__ */
181#endif /* _ASM_POWERPC_COMPAT_H */