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 | 26 | |
958b7b07 SR |
27 | #include "systbls.h" |
28 | ||
1da177e4 LT |
29 | /* #define DEBUG_UNIMP_SYSCALL */ |
30 | ||
31 | /* XXX Make this per-binary type, this way we can detect the type of | |
32 | * XXX a binary. Every Sparc executable calls this very early on. | |
33 | */ | |
34 | asmlinkage unsigned long sys_getpagesize(void) | |
35 | { | |
36 | return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */ | |
37 | } | |
38 | ||
1da177e4 LT |
39 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) |
40 | { | |
a046be3d | 41 | struct vm_unmapped_area_info info; |
1da177e4 LT |
42 | |
43 | if (flags & MAP_FIXED) { | |
44 | /* We do not accept a shared mapping if it would violate | |
45 | * cache aliasing constraints. | |
46 | */ | |
e77414e0 AV |
47 | if ((flags & MAP_SHARED) && |
48 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
1da177e4 LT |
49 | return -EINVAL; |
50 | return addr; | |
51 | } | |
52 | ||
53 | /* See asm-sparc/uaccess.h */ | |
54 | if (len > TASK_SIZE - PAGE_SIZE) | |
55 | return -ENOMEM; | |
1da177e4 LT |
56 | if (!addr) |
57 | addr = TASK_UNMAPPED_BASE; | |
58 | ||
a046be3d ML |
59 | info.flags = 0; |
60 | info.length = len; | |
61 | info.low_limit = addr; | |
62 | info.high_limit = TASK_SIZE; | |
63 | info.align_mask = (flags & MAP_SHARED) ? | |
64 | (PAGE_MASK & (SHMLBA - 1)) : 0; | |
65 | info.align_offset = pgoff << PAGE_SHIFT; | |
66 | return vm_unmapped_area(&info); | |
1da177e4 LT |
67 | } |
68 | ||
1da177e4 LT |
69 | /* |
70 | * sys_pipe() is the normal C calling standard for creating | |
71 | * a pipe. It's not the way unix traditionally does this, though. | |
72 | */ | |
958b7b07 | 73 | asmlinkage long sparc_pipe(struct pt_regs *regs) |
1da177e4 LT |
74 | { |
75 | int fd[2]; | |
76 | int error; | |
77 | ||
ed8cae8b | 78 | error = do_pipe_flags(fd, 0); |
1da177e4 LT |
79 | if (error) |
80 | goto out; | |
81 | regs->u_regs[UREG_I1] = fd[1]; | |
82 | error = fd[0]; | |
83 | out: | |
84 | return error; | |
85 | } | |
86 | ||
94d149c3 | 87 | int sparc_mmap_check(unsigned long addr, unsigned long len) |
3a459756 | 88 | { |
3a459756 KK |
89 | /* See asm-sparc/uaccess.h */ |
90 | if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE) | |
91 | return -EINVAL; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
1da177e4 | 96 | /* Linux version of mmap */ |
1da177e4 | 97 | |
958b7b07 | 98 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, |
1da177e4 LT |
99 | unsigned long prot, unsigned long flags, unsigned long fd, |
100 | unsigned long pgoff) | |
101 | { | |
102 | /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE | |
103 | we have. */ | |
f8b72560 AV |
104 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
105 | pgoff >> (PAGE_SHIFT - 12)); | |
1da177e4 LT |
106 | } |
107 | ||
958b7b07 | 108 | asmlinkage long sys_mmap(unsigned long addr, unsigned long len, |
1da177e4 LT |
109 | unsigned long prot, unsigned long flags, unsigned long fd, |
110 | unsigned long off) | |
111 | { | |
f8b72560 AV |
112 | /* no alignment check? */ |
113 | return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); | |
1da177e4 LT |
114 | } |
115 | ||
116 | long sparc_remap_file_pages(unsigned long start, unsigned long size, | |
117 | unsigned long prot, unsigned long pgoff, | |
118 | unsigned long flags) | |
119 | { | |
120 | /* This works on an existing mmap so we don't need to validate | |
121 | * the range as that was done at the original mmap call. | |
122 | */ | |
123 | return sys_remap_file_pages(start, size, prot, | |
124 | (pgoff >> (PAGE_SHIFT - 12)), flags); | |
125 | } | |
126 | ||
1da177e4 LT |
127 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ |
128 | asmlinkage unsigned long | |
129 | c_sys_nis_syscall (struct pt_regs *regs) | |
130 | { | |
131 | static int count = 0; | |
132 | ||
133 | if (count++ > 5) | |
134 | return -ENOSYS; | |
135 | printk ("%s[%d]: Unimplemented SPARC system call %d\n", | |
19c5870c | 136 | current->comm, task_pid_nr(current), (int)regs->u_regs[1]); |
1da177e4 LT |
137 | #ifdef DEBUG_UNIMP_SYSCALL |
138 | show_regs (regs); | |
139 | #endif | |
140 | return -ENOSYS; | |
141 | } | |
142 | ||
143 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
144 | ||
145 | asmlinkage void | |
146 | sparc_breakpoint (struct pt_regs *regs) | |
147 | { | |
148 | siginfo_t info; | |
149 | ||
1da177e4 LT |
150 | #ifdef DEBUG_SPARC_BREAKPOINT |
151 | printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc); | |
152 | #endif | |
153 | info.si_signo = SIGTRAP; | |
154 | info.si_errno = 0; | |
155 | info.si_code = TRAP_BRKPT; | |
156 | info.si_addr = (void __user *)regs->pc; | |
157 | info.si_trapno = 0; | |
158 | force_sig_info(SIGTRAP, &info, current); | |
159 | ||
160 | #ifdef DEBUG_SPARC_BREAKPOINT | |
161 | printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc); | |
162 | #endif | |
1da177e4 LT |
163 | } |
164 | ||
a274bd49 AV |
165 | SYSCALL_DEFINE3(sparc_sigaction, int, sig, |
166 | struct old_sigaction __user *,act, | |
167 | struct old_sigaction __user *,oact) | |
1da177e4 | 168 | { |
5526b7e4 | 169 | WARN_ON_ONCE(sig >= 0); |
a274bd49 | 170 | return sys_sigaction(-sig, act, oact); |
1da177e4 LT |
171 | } |
172 | ||
eaca6eae AV |
173 | SYSCALL_DEFINE5(rt_sigaction, int, sig, |
174 | const struct sigaction __user *, act, | |
175 | struct sigaction __user *, oact, | |
176 | void __user *, restorer, | |
177 | size_t, sigsetsize) | |
1da177e4 LT |
178 | { |
179 | struct k_sigaction new_ka, old_ka; | |
180 | int ret; | |
181 | ||
182 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
183 | if (sigsetsize != sizeof(sigset_t)) | |
184 | return -EINVAL; | |
185 | ||
1da177e4 LT |
186 | if (act) { |
187 | new_ka.ka_restorer = restorer; | |
188 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
189 | return -EFAULT; | |
190 | } | |
191 | ||
192 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
193 | ||
194 | if (!ret && oact) { | |
195 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
196 | return -EFAULT; | |
197 | } | |
198 | ||
199 | return ret; | |
200 | } | |
201 | ||
958b7b07 | 202 | asmlinkage long sys_getdomainname(char __user *name, int len) |
1da177e4 | 203 | { |
8310a32c | 204 | int nlen, err; |
1da177e4 | 205 | |
b9c54f91 | 206 | if (len < 0) |
8310a32c DM |
207 | return -EINVAL; |
208 | ||
1da177e4 LT |
209 | down_read(&uts_sem); |
210 | ||
e9ff3990 | 211 | nlen = strlen(utsname()->domainname) + 1; |
b9c54f91 AW |
212 | err = -EINVAL; |
213 | if (nlen > len) | |
214 | goto out; | |
8310a32c DM |
215 | |
216 | err = -EFAULT; | |
e9ff3990 | 217 | if (!copy_to_user(name, utsname()->domainname, nlen)) |
8310a32c DM |
218 | err = 0; |
219 | ||
b9c54f91 | 220 | out: |
1da177e4 LT |
221 | up_read(&uts_sem); |
222 | return err; | |
223 | } |