Commit | Line | Data |
---|---|---|
5526b7e4 | 1 | /* linux/arch/sparc/kernel/sys_sparc.c |
1da177e4 LT |
2 | * |
3 | * This file contains various random system calls that | |
4 | * have a non-standard calling sequence on the Linux/sparc | |
5 | * platform. | |
6 | */ | |
7 | ||
8 | #include <linux/errno.h> | |
9 | #include <linux/types.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/fs.h> | |
13 | #include <linux/file.h> | |
14 | #include <linux/sem.h> | |
15 | #include <linux/msg.h> | |
16 | #include <linux/shm.h> | |
17 | #include <linux/stat.h> | |
18 | #include <linux/syscalls.h> | |
19 | #include <linux/mman.h> | |
20 | #include <linux/utsname.h> | |
21 | #include <linux/smp.h> | |
cba4fbbf | 22 | #include <linux/ipc.h> |
1da177e4 LT |
23 | |
24 | #include <asm/uaccess.h> | |
fe74290d | 25 | #include <asm/unistd.h> |
1da177e4 LT |
26 | |
27 | /* #define DEBUG_UNIMP_SYSCALL */ | |
28 | ||
29 | /* XXX Make this per-binary type, this way we can detect the type of | |
30 | * XXX a binary. Every Sparc executable calls this very early on. | |
31 | */ | |
32 | asmlinkage unsigned long sys_getpagesize(void) | |
33 | { | |
34 | return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */ | |
35 | } | |
36 | ||
1da177e4 LT |
37 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) |
38 | { | |
a046be3d | 39 | struct vm_unmapped_area_info info; |
1da177e4 LT |
40 | |
41 | if (flags & MAP_FIXED) { | |
42 | /* We do not accept a shared mapping if it would violate | |
43 | * cache aliasing constraints. | |
44 | */ | |
e77414e0 AV |
45 | if ((flags & MAP_SHARED) && |
46 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
1da177e4 LT |
47 | return -EINVAL; |
48 | return addr; | |
49 | } | |
50 | ||
51 | /* See asm-sparc/uaccess.h */ | |
52 | if (len > TASK_SIZE - PAGE_SIZE) | |
53 | return -ENOMEM; | |
1da177e4 LT |
54 | if (!addr) |
55 | addr = TASK_UNMAPPED_BASE; | |
56 | ||
a046be3d ML |
57 | info.flags = 0; |
58 | info.length = len; | |
59 | info.low_limit = addr; | |
60 | info.high_limit = TASK_SIZE; | |
61 | info.align_mask = (flags & MAP_SHARED) ? | |
62 | (PAGE_MASK & (SHMLBA - 1)) : 0; | |
63 | info.align_offset = pgoff << PAGE_SHIFT; | |
64 | return vm_unmapped_area(&info); | |
1da177e4 LT |
65 | } |
66 | ||
1da177e4 LT |
67 | /* |
68 | * sys_pipe() is the normal C calling standard for creating | |
69 | * a pipe. It's not the way unix traditionally does this, though. | |
70 | */ | |
71 | asmlinkage int sparc_pipe(struct pt_regs *regs) | |
72 | { | |
73 | int fd[2]; | |
74 | int error; | |
75 | ||
ed8cae8b | 76 | error = do_pipe_flags(fd, 0); |
1da177e4 LT |
77 | if (error) |
78 | goto out; | |
79 | regs->u_regs[UREG_I1] = fd[1]; | |
80 | error = fd[0]; | |
81 | out: | |
82 | return error; | |
83 | } | |
84 | ||
94d149c3 | 85 | int sparc_mmap_check(unsigned long addr, unsigned long len) |
3a459756 | 86 | { |
3a459756 KK |
87 | /* See asm-sparc/uaccess.h */ |
88 | if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE) | |
89 | return -EINVAL; | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
1da177e4 | 94 | /* Linux version of mmap */ |
1da177e4 LT |
95 | |
96 | asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, | |
97 | unsigned long prot, unsigned long flags, unsigned long fd, | |
98 | unsigned long pgoff) | |
99 | { | |
100 | /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE | |
101 | we have. */ | |
f8b72560 AV |
102 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
103 | pgoff >> (PAGE_SHIFT - 12)); | |
1da177e4 LT |
104 | } |
105 | ||
106 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
107 | unsigned long prot, unsigned long flags, unsigned long fd, | |
108 | unsigned long off) | |
109 | { | |
f8b72560 AV |
110 | /* no alignment check? */ |
111 | return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); | |
1da177e4 LT |
112 | } |
113 | ||
114 | long sparc_remap_file_pages(unsigned long start, unsigned long size, | |
115 | unsigned long prot, unsigned long pgoff, | |
116 | unsigned long flags) | |
117 | { | |
118 | /* This works on an existing mmap so we don't need to validate | |
119 | * the range as that was done at the original mmap call. | |
120 | */ | |
121 | return sys_remap_file_pages(start, size, prot, | |
122 | (pgoff >> (PAGE_SHIFT - 12)), flags); | |
123 | } | |
124 | ||
1da177e4 LT |
125 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ |
126 | asmlinkage unsigned long | |
127 | c_sys_nis_syscall (struct pt_regs *regs) | |
128 | { | |
129 | static int count = 0; | |
130 | ||
131 | if (count++ > 5) | |
132 | return -ENOSYS; | |
133 | printk ("%s[%d]: Unimplemented SPARC system call %d\n", | |
19c5870c | 134 | current->comm, task_pid_nr(current), (int)regs->u_regs[1]); |
1da177e4 LT |
135 | #ifdef DEBUG_UNIMP_SYSCALL |
136 | show_regs (regs); | |
137 | #endif | |
138 | return -ENOSYS; | |
139 | } | |
140 | ||
141 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
142 | ||
143 | asmlinkage void | |
144 | sparc_breakpoint (struct pt_regs *regs) | |
145 | { | |
146 | siginfo_t info; | |
147 | ||
1da177e4 LT |
148 | #ifdef DEBUG_SPARC_BREAKPOINT |
149 | printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc); | |
150 | #endif | |
151 | info.si_signo = SIGTRAP; | |
152 | info.si_errno = 0; | |
153 | info.si_code = TRAP_BRKPT; | |
154 | info.si_addr = (void __user *)regs->pc; | |
155 | info.si_trapno = 0; | |
156 | force_sig_info(SIGTRAP, &info, current); | |
157 | ||
158 | #ifdef DEBUG_SPARC_BREAKPOINT | |
159 | printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc); | |
160 | #endif | |
1da177e4 LT |
161 | } |
162 | ||
a274bd49 AV |
163 | SYSCALL_DEFINE3(sparc_sigaction, int, sig, |
164 | struct old_sigaction __user *,act, | |
165 | struct old_sigaction __user *,oact) | |
1da177e4 | 166 | { |
5526b7e4 | 167 | WARN_ON_ONCE(sig >= 0); |
a274bd49 | 168 | return sys_sigaction(-sig, act, oact); |
1da177e4 LT |
169 | } |
170 | ||
eaca6eae AV |
171 | SYSCALL_DEFINE5(rt_sigaction, int, sig, |
172 | const struct sigaction __user *, act, | |
173 | struct sigaction __user *, oact, | |
174 | void __user *, restorer, | |
175 | size_t, sigsetsize) | |
1da177e4 LT |
176 | { |
177 | struct k_sigaction new_ka, old_ka; | |
178 | int ret; | |
179 | ||
180 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
181 | if (sigsetsize != sizeof(sigset_t)) | |
182 | return -EINVAL; | |
183 | ||
1da177e4 LT |
184 | if (act) { |
185 | new_ka.ka_restorer = restorer; | |
186 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
187 | return -EFAULT; | |
188 | } | |
189 | ||
190 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
191 | ||
192 | if (!ret && oact) { | |
193 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
194 | return -EFAULT; | |
195 | } | |
196 | ||
197 | return ret; | |
198 | } | |
199 | ||
200 | asmlinkage int sys_getdomainname(char __user *name, int len) | |
201 | { | |
8310a32c | 202 | int nlen, err; |
1da177e4 | 203 | |
b9c54f91 | 204 | if (len < 0) |
8310a32c DM |
205 | return -EINVAL; |
206 | ||
1da177e4 LT |
207 | down_read(&uts_sem); |
208 | ||
e9ff3990 | 209 | nlen = strlen(utsname()->domainname) + 1; |
b9c54f91 AW |
210 | err = -EINVAL; |
211 | if (nlen > len) | |
212 | goto out; | |
8310a32c DM |
213 | |
214 | err = -EFAULT; | |
e9ff3990 | 215 | if (!copy_to_user(name, utsname()->domainname, nlen)) |
8310a32c DM |
216 | err = 0; |
217 | ||
b9c54f91 | 218 | out: |
1da177e4 LT |
219 | up_read(&uts_sem); |
220 | return err; | |
221 | } |