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-rw-r--r--ipc/compat.c98
-rw-r--r--ipc/syscall.c90
2 files changed, 93 insertions, 95 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
index 3c25ca1e46c7..00c2e3beccc8 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -39,11 +39,6 @@ struct compat_msgbuf {
39 char mtext[1]; 39 char mtext[1];
40}; 40};
41 41
42struct compat_ipc_kludge {
43 compat_uptr_t msgp;
44 compat_long_t msgtyp;
45};
46
47int get_compat_ipc64_perm(struct ipc64_perm *to, 42int get_compat_ipc64_perm(struct ipc64_perm *to,
48 struct compat_ipc64_perm __user *from) 43 struct compat_ipc64_perm __user *from)
49{ 44{
@@ -104,95 +99,6 @@ static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bu
104 return msgsz; 99 return msgsz;
105} 100}
106 101
107#ifndef COMPAT_SHMLBA
108#define COMPAT_SHMLBA SHMLBA
109#endif
110
111#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
112COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
113 u32, third, compat_uptr_t, ptr, u32, fifth)
114{
115 int version;
116 u32 pad;
117
118 version = call >> 16; /* hack for backward compatibility */
119 call &= 0xffff;
120
121 switch (call) {
122 case SEMOP:
123 /* struct sembuf is the same on 32 and 64bit :)) */
124 return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
125 case SEMTIMEDOP:
126 return compat_sys_semtimedop(first, compat_ptr(ptr), second,
127 compat_ptr(fifth));
128 case SEMGET:
129 return sys_semget(first, second, third);
130 case SEMCTL:
131 if (!ptr)
132 return -EINVAL;
133 if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
134 return -EFAULT;
135 return compat_sys_semctl(first, second, third, pad);
136
137 case MSGSND: {
138 struct compat_msgbuf __user *up = compat_ptr(ptr);
139 compat_long_t type;
140
141 if (first < 0 || second < 0)
142 return -EINVAL;
143
144 if (get_user(type, &up->mtype))
145 return -EFAULT;
146
147 return do_msgsnd(first, type, up->mtext, second, third);
148 }
149 case MSGRCV: {
150 void __user *uptr = compat_ptr(ptr);
151
152 if (first < 0 || second < 0)
153 return -EINVAL;
154
155 if (!version) {
156 struct compat_ipc_kludge ipck;
157 if (!uptr)
158 return -EINVAL;
159 if (copy_from_user(&ipck, uptr, sizeof(ipck)))
160 return -EFAULT;
161 uptr = compat_ptr(ipck.msgp);
162 fifth = ipck.msgtyp;
163 }
164 return do_msgrcv(first, uptr, second, (s32)fifth, third,
165 compat_do_msg_fill);
166 }
167 case MSGGET:
168 return sys_msgget(first, second);
169 case MSGCTL:
170 return compat_sys_msgctl(first, second, compat_ptr(ptr));
171
172 case SHMAT: {
173 int err;
174 unsigned long raddr;
175
176 if (version == 1)
177 return -EINVAL;
178 err = do_shmat(first, compat_ptr(ptr), second, &raddr,
179 COMPAT_SHMLBA);
180 if (err < 0)
181 return err;
182 return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
183 }
184 case SHMDT:
185 return sys_shmdt(compat_ptr(ptr));
186 case SHMGET:
187 return sys_shmget(first, (unsigned)second, third);
188 case SHMCTL:
189 return compat_sys_shmctl(first, second, compat_ptr(ptr));
190 }
191
192 return -ENOSYS;
193}
194#endif
195
196COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp, 102COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
197 compat_ssize_t, msgsz, int, msgflg) 103 compat_ssize_t, msgsz, int, msgflg)
198{ 104{
@@ -211,6 +117,10 @@ COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
211 msgflg, compat_do_msg_fill); 117 msgflg, compat_do_msg_fill);
212} 118}
213 119
120#ifndef COMPAT_SHMLBA
121#define COMPAT_SHMLBA SHMLBA
122#endif
123
214COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg) 124COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
215{ 125{
216 unsigned long ret; 126 unsigned long ret;
diff --git a/ipc/syscall.c b/ipc/syscall.c
index 52429489cde0..667022746ca5 100644
--- a/ipc/syscall.c
+++ b/ipc/syscall.c
@@ -5,12 +5,12 @@
5 * the individual syscalls instead. 5 * the individual syscalls instead.
6 */ 6 */
7#include <linux/unistd.h> 7#include <linux/unistd.h>
8#include <linux/syscalls.h>
8 9
9#ifdef __ARCH_WANT_SYS_IPC 10#ifdef __ARCH_WANT_SYS_IPC
10#include <linux/errno.h> 11#include <linux/errno.h>
11#include <linux/ipc.h> 12#include <linux/ipc.h>
12#include <linux/shm.h> 13#include <linux/shm.h>
13#include <linux/syscalls.h>
14#include <linux/uaccess.h> 14#include <linux/uaccess.h>
15 15
16SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second, 16SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
@@ -97,3 +97,91 @@ SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
97 } 97 }
98} 98}
99#endif 99#endif
100
101#ifdef CONFIG_COMPAT
102#include <linux/compat.h>
103
104#ifndef COMPAT_SHMLBA
105#define COMPAT_SHMLBA SHMLBA
106#endif
107
108struct compat_ipc_kludge {
109 compat_uptr_t msgp;
110 compat_long_t msgtyp;
111};
112
113#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
114COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
115 u32, third, compat_uptr_t, ptr, u32, fifth)
116{
117 int version;
118 u32 pad;
119
120 version = call >> 16; /* hack for backward compatibility */
121 call &= 0xffff;
122
123 switch (call) {
124 case SEMOP:
125 /* struct sembuf is the same on 32 and 64bit :)) */
126 return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
127 case SEMTIMEDOP:
128 return compat_sys_semtimedop(first, compat_ptr(ptr), second,
129 compat_ptr(fifth));
130 case SEMGET:
131 return sys_semget(first, second, third);
132 case SEMCTL:
133 if (!ptr)
134 return -EINVAL;
135 if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
136 return -EFAULT;
137 return compat_sys_semctl(first, second, third, pad);
138
139 case MSGSND:
140 return compat_sys_msgsnd(first, ptr, second, third);
141
142 case MSGRCV: {
143 void __user *uptr = compat_ptr(ptr);
144
145 if (first < 0 || second < 0)
146 return -EINVAL;
147
148 if (!version) {
149 struct compat_ipc_kludge ipck;
150 if (!uptr)
151 return -EINVAL;
152 if (copy_from_user(&ipck, uptr, sizeof(ipck)))
153 return -EFAULT;
154 return compat_sys_msgrcv(first, ipck.msgp, second,
155 ipck.msgtyp, third);
156 }
157 return compat_sys_msgrcv(first, ptr, second, fifth, third);
158 }
159 case MSGGET:
160 return sys_msgget(first, second);
161 case MSGCTL:
162 return compat_sys_msgctl(first, second, compat_ptr(ptr));
163
164 case SHMAT: {
165 int err;
166 unsigned long raddr;
167
168 if (version == 1)
169 return -EINVAL;
170 err = do_shmat(first, compat_ptr(ptr), second, &raddr,
171 COMPAT_SHMLBA);
172 if (err < 0)
173 return err;
174 return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
175 }
176 case SHMDT:
177 return sys_shmdt(compat_ptr(ptr));
178 case SHMGET:
179 return sys_shmget(first, (unsigned)second, third);
180 case SHMCTL:
181 return compat_sys_shmctl(first, second, compat_ptr(ptr));
182 }
183
184 return -ENOSYS;
185}
186#endif
187#endif