1
2#include <linux/config.h>
3#include <linux/slab.h>
4#include <linux/module.h>
5#include <linux/unistd.h>
6#include <linux/smp_lock.h>
7#include <linux/init.h>
8#include <linux/sched.h>
9#include <linux/types.h>
10
11#include <asm/uaccess.h>
12#include "sys32.h"
13
14struct k_sigaction32 {
15 struct sigaction32 sa;
16};
17
18typedef unsigned int old_sigset_t32;
19
20static int
21put_old_sigset32(old_sigset_t32 *up, old_sigset_t *set)
22{
23 old_sigset_t32 set32 = *set;
24 return put_user(set32, up);
25}
26
27static int
28get_old_segset32(old_sigset_t32 *up, old_sigset_t *set)
29{
30 old_sigset_t32 set32;
31 int r;
32
33 if ((r = get_user(set32, up)) == 0)
34 *set = set32;
35
36 return r;
37}
38
39long
40sys32_sigpending(old_sigset_t32 *set)
41{
42 extern long sys_sigpending(old_sigset_t *set);
43 old_sigset_t pending;
44 int ret;
45
46 KERNEL_SYSCALL(ret, sys_sigpending, &pending);
47
48
49 if (put_old_sigset32(set, &pending))
50 return -EFAULT;
51
52 return ret;
53}
54
55int sys32_sigprocmask(int how, old_sigset_t32 *set,
56 old_sigset_t32 *oset)
57{
58 extern int sys_sigprocmask(int how, old_sigset_t *set,
59 old_sigset_t *oset);
60 old_sigset_t s;
61 int ret;
62
63 if (set && get_old_segset32 (set, &s))
64 return -EFAULT;
65 KERNEL_SYSCALL(ret, sys_sigprocmask, how, set ? &s : NULL, oset ? &s : NULL);
66 if (!ret && oset && put_old_sigset32(oset, &s))
67 return -EFAULT;
68 return ret;
69}
70
71static inline void
72sigset_32to64(sigset_t *s64, sigset_t32 *s32)
73{
74 s64->sig[0] = s32->sig[0] | ((unsigned long)s32->sig[1] << 32);
75}
76
77static inline void
78sigset_64to32(sigset_t32 *s32, sigset_t *s64)
79{
80 s32->sig[0] = s64->sig[0] & 0xffffffffUL;
81 s32->sig[1] = (s64->sig[0] >> 32) & 0xffffffffUL;
82}
83
84static int
85put_sigset32(sigset_t32 *up, sigset_t *set, size_t sz)
86{
87 sigset_t32 s;
88
89 if (sz != sizeof *set) panic("put_sigset32()");
90 sigset_64to32(&s, set);
91
92 return copy_to_user(up, &s, sizeof s);
93}
94
95static int
96get_sigset32(sigset_t32 *up, sigset_t *set, size_t sz)
97{
98 sigset_t32 s;
99 int r;
100
101 if (sz != sizeof *set) panic("put_sigset32()");
102
103 if ((r = copy_from_user(&s, up, sz)) == 0) {
104 sigset_32to64(set, &s);
105 }
106
107 return r;
108}
109
110int sys32_rt_sigprocmask(int how, sigset_t32 *set, sigset_t32 *oset,
111 unsigned int sigsetsize)
112{
113 extern long sys_rt_sigprocmask(int how,
114 sigset_t *set, sigset_t *oset,
115 size_t sigsetsize);
116 sigset_t old_set, new_set;
117 int ret;
118
119 if (set && get_sigset32(set, &new_set, sigsetsize))
120 return -EFAULT;
121
122 KERNEL_SYSCALL(ret, sys_rt_sigprocmask, how, set ? &new_set : NULL,
123 oset ? &old_set : NULL, sigsetsize);
124
125 if (!ret && oset && put_sigset32(oset, &old_set, sigsetsize))
126 return -EFAULT;
127
128 return ret;
129}
130
131
132int sys32_rt_sigpending(sigset_t32 *uset, unsigned int sigsetsize)
133{
134 int ret;
135 sigset_t set;
136 extern long sys_rt_sigpending(sigset_t *set, size_t sigsetsize);
137
138 KERNEL_SYSCALL(ret, sys_rt_sigpending, &set, sigsetsize);
139
140 if (!ret && put_sigset32(uset, &set, sigsetsize))
141 return -EFAULT;
142
143 return ret;
144}
145
146long
147sys32_rt_sigaction(int sig, const struct sigaction32 *act, struct sigaction32 *oact,
148 size_t sigsetsize)
149{
150 struct k_sigaction32 new_sa32, old_sa32;
151 struct k_sigaction new_sa, old_sa;
152 int ret = -EINVAL;
153
154 if (act) {
155 if (copy_from_user(&new_sa32.sa, act, sizeof new_sa32.sa))
156 return -EFAULT;
157 new_sa.sa.sa_handler = (__sighandler_t)(unsigned long)new_sa32.sa.sa_handler;
158 new_sa.sa.sa_flags = new_sa32.sa.sa_flags;
159 sigset_32to64(&new_sa.sa.sa_mask, &new_sa32.sa.sa_mask);
160 }
161
162 ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
163
164 if (!ret && oact) {
165 sigset_64to32(&old_sa32.sa.sa_mask, &old_sa.sa.sa_mask);
166 old_sa32.sa.sa_flags = old_sa.sa.sa_flags;
167 old_sa32.sa.sa_handler = (__sighandler_t32)(unsigned long)old_sa.sa.sa_handler;
168 if (copy_to_user(oact, &old_sa32.sa, sizeof old_sa32.sa))
169 return -EFAULT;
170 }
171 return ret;
172}
173
174typedef struct {
175 unsigned int ss_sp;
176 int ss_flags;
177 __kernel_size_t32 ss_size;
178} stack_t32;
179
180int
181do_sigaltstack32 (const stack_t32 *uss32, stack_t32 *uoss32, unsigned long sp)
182{
183 stack_t32 ss32, oss32;
184 stack_t ss, oss;
185 stack_t *ssp = NULL, *ossp = NULL;
186 int ret;
187
188 if (uss32) {
189 if (copy_from_user(&ss32, uss32, sizeof ss32))
190 return -EFAULT;
191
192 ss.ss_sp = (void *)ss32.ss_sp;
193 ss.ss_flags = ss32.ss_flags;
194 ss.ss_size = ss32.ss_size;
195
196 ssp = &ss;
197 }
198
199 if (uoss32)
200 ossp = &oss;
201
202 KERNEL_SYSCALL(ret, do_sigaltstack, ssp, ossp, sp);
203
204 if (!ret && uoss32) {
205 oss32.ss_sp = (unsigned int)(unsigned long)oss.ss_sp;
206 oss32.ss_flags = oss.ss_flags;
207 oss32.ss_size = oss.ss_size;
208 if (copy_to_user(uoss32, &oss32, sizeof *uoss32))
209 return -EFAULT;
210 }
211
212 return ret;
213}
214
