This source file includes following definitions.
- sysm_pipe
- SYSCALL_DEFINE6
- SYSCALL_DEFINE6
- SYSCALL_DEFINE1
- mips_atomic_set
- SYSCALL_DEFINE3
- SYSCALL_DEFINE3
- bad_stack
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10 #include <linux/capability.h>
11 #include <linux/errno.h>
12 #include <linux/linkage.h>
13 #include <linux/fs.h>
14 #include <linux/smp.h>
15 #include <linux/ptrace.h>
16 #include <linux/string.h>
17 #include <linux/syscalls.h>
18 #include <linux/file.h>
19 #include <linux/utsname.h>
20 #include <linux/unistd.h>
21 #include <linux/sem.h>
22 #include <linux/msg.h>
23 #include <linux/shm.h>
24 #include <linux/compiler.h>
25 #include <linux/ipc.h>
26 #include <linux/uaccess.h>
27 #include <linux/slab.h>
28 #include <linux/elf.h>
29 #include <linux/sched/task_stack.h>
30
31 #include <asm/asm.h>
32 #include <asm/asm-eva.h>
33 #include <asm/branch.h>
34 #include <asm/cachectl.h>
35 #include <asm/cacheflush.h>
36 #include <asm/asm-offsets.h>
37 #include <asm/signal.h>
38 #include <asm/sim.h>
39 #include <asm/shmparam.h>
40 #include <asm/sysmips.h>
41 #include <asm/switch_to.h>
42
43
44
45
46
47
48
49
50 asmlinkage int sysm_pipe(void)
51 {
52 int fd[2];
53 int error = do_pipe_flags(fd, 0);
54 if (error)
55 return error;
56 current_pt_regs()->regs[3] = fd[1];
57 return fd[0];
58 }
59
60 SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
61 unsigned long, prot, unsigned long, flags, unsigned long,
62 fd, off_t, offset)
63 {
64 if (offset & ~PAGE_MASK)
65 return -EINVAL;
66 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
67 offset >> PAGE_SHIFT);
68 }
69
70 SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
71 unsigned long, prot, unsigned long, flags, unsigned long, fd,
72 unsigned long, pgoff)
73 {
74 if (pgoff & (~PAGE_MASK >> 12))
75 return -EINVAL;
76
77 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
78 pgoff >> (PAGE_SHIFT - 12));
79 }
80
81 save_static_function(sys_fork);
82 save_static_function(sys_clone);
83 save_static_function(sys_clone3);
84
85 SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
86 {
87 struct thread_info *ti = task_thread_info(current);
88
89 ti->tp_value = addr;
90 if (cpu_has_userlocal)
91 write_c0_userlocal(addr);
92
93 return 0;
94 }
95
96 static inline int mips_atomic_set(unsigned long addr, unsigned long new)
97 {
98 unsigned long old, tmp;
99 struct pt_regs *regs;
100 unsigned int err;
101
102 if (unlikely(addr & 3))
103 return -EINVAL;
104
105 if (unlikely(!access_ok((const void __user *)addr, 4)))
106 return -EINVAL;
107
108 if (cpu_has_llsc && R10000_LLSC_WAR) {
109 __asm__ __volatile__ (
110 " .set push \n"
111 " .set arch=r4000 \n"
112 " li %[err], 0 \n"
113 "1: ll %[old], (%[addr]) \n"
114 " move %[tmp], %[new] \n"
115 "2: sc %[tmp], (%[addr]) \n"
116 " beqzl %[tmp], 1b \n"
117 "3: \n"
118 " .insn \n"
119 " .section .fixup,\"ax\" \n"
120 "4: li %[err], %[efault] \n"
121 " j 3b \n"
122 " .previous \n"
123 " .section __ex_table,\"a\" \n"
124 " "STR(PTR)" 1b, 4b \n"
125 " "STR(PTR)" 2b, 4b \n"
126 " .previous \n"
127 " .set pop \n"
128 : [old] "=&r" (old),
129 [err] "=&r" (err),
130 [tmp] "=&r" (tmp)
131 : [addr] "r" (addr),
132 [new] "r" (new),
133 [efault] "i" (-EFAULT)
134 : "memory");
135 } else if (cpu_has_llsc) {
136 loongson_llsc_mb();
137 __asm__ __volatile__ (
138 " .set push \n"
139 " .set "MIPS_ISA_ARCH_LEVEL" \n"
140 " li %[err], 0 \n"
141 "1: \n"
142 user_ll("%[old]", "(%[addr])")
143 " move %[tmp], %[new] \n"
144 "2: \n"
145 user_sc("%[tmp]", "(%[addr])")
146 " beqz %[tmp], 1b \n"
147 "3: \n"
148 " .insn \n"
149 " .section .fixup,\"ax\" \n"
150 "5: li %[err], %[efault] \n"
151 " j 3b \n"
152 " .previous \n"
153 " .section __ex_table,\"a\" \n"
154 " "STR(PTR)" 1b, 5b \n"
155 " "STR(PTR)" 2b, 5b \n"
156 " .previous \n"
157 " .set pop \n"
158 : [old] "=&r" (old),
159 [err] "=&r" (err),
160 [tmp] "=&r" (tmp)
161 : [addr] "r" (addr),
162 [new] "r" (new),
163 [efault] "i" (-EFAULT)
164 : "memory");
165 } else {
166 do {
167 preempt_disable();
168 ll_bit = 1;
169 ll_task = current;
170 preempt_enable();
171
172 err = __get_user(old, (unsigned int *) addr);
173 err |= __put_user(new, (unsigned int *) addr);
174 if (err)
175 break;
176 rmb();
177 } while (!ll_bit);
178 }
179
180 if (unlikely(err))
181 return err;
182
183 regs = current_pt_regs();
184 regs->regs[2] = old;
185 regs->regs[7] = 0;
186
187
188
189
190 __asm__ __volatile__(
191 " move $29, %0 \n"
192 " j syscall_exit \n"
193 :
194 : "r" (regs));
195
196
197 unreachable();
198 }
199
200
201
202
203
204 save_static_function(sys_sysmips);
205
206 SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
207 {
208 switch (cmd) {
209 case MIPS_ATOMIC_SET:
210 return mips_atomic_set(arg1, arg2);
211
212 case MIPS_FIXADE:
213 if (arg1 & ~3)
214 return -EINVAL;
215
216 if (arg1 & 1)
217 set_thread_flag(TIF_FIXADE);
218 else
219 clear_thread_flag(TIF_FIXADE);
220 if (arg1 & 2)
221 set_thread_flag(TIF_LOGADE);
222 else
223 clear_thread_flag(TIF_LOGADE);
224
225 return 0;
226
227 case FLUSH_CACHE:
228 __flush_cache_all();
229 return 0;
230 }
231
232 return -EINVAL;
233 }
234
235
236
237
238 SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
239 {
240 return -ENOSYS;
241 }
242
243
244
245
246
247 asmlinkage void bad_stack(void)
248 {
249 do_exit(SIGSEGV);
250 }