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8#include <linux/errno.h>
9#include <linux/types.h>
10#include <linux/sched/signal.h>
11#include <linux/sched/mm.h>
12#include <linux/sched/debug.h>
13#include <linux/mm.h>
14#include <linux/fs.h>
15#include <linux/file.h>
16#include <linux/sem.h>
17#include <linux/msg.h>
18#include <linux/shm.h>
19#include <linux/stat.h>
20#include <linux/syscalls.h>
21#include <linux/mman.h>
22#include <linux/utsname.h>
23#include <linux/smp.h>
24#include <linux/ipc.h>
25
26#include <linux/uaccess.h>
27#include <asm/unistd.h>
28
29#include "systbls.h"
30
31
32
33
34
35
36asmlinkage unsigned long sys_getpagesize(void)
37{
38 return PAGE_SIZE;
39}
40
41unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
42{
43 struct vm_unmapped_area_info info;
44
45 if (flags & MAP_FIXED) {
46
47
48
49 if ((flags & MAP_SHARED) &&
50 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
51 return -EINVAL;
52 return addr;
53 }
54
55
56 if (len > TASK_SIZE - PAGE_SIZE)
57 return -ENOMEM;
58 if (!addr)
59 addr = TASK_UNMAPPED_BASE;
60
61 info.flags = 0;
62 info.length = len;
63 info.low_limit = addr;
64 info.high_limit = TASK_SIZE;
65 info.align_mask = (flags & MAP_SHARED) ?
66 (PAGE_MASK & (SHMLBA - 1)) : 0;
67 info.align_offset = pgoff << PAGE_SHIFT;
68 return vm_unmapped_area(&info);
69}
70
71
72
73
74
75asmlinkage long sparc_pipe(struct pt_regs *regs)
76{
77 int fd[2];
78 int error;
79
80 error = do_pipe_flags(fd, 0);
81 if (error)
82 goto out;
83 regs->u_regs[UREG_I1] = fd[1];
84 error = fd[0];
85out:
86 return error;
87}
88
89int sparc_mmap_check(unsigned long addr, unsigned long len)
90{
91
92 if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
93 return -EINVAL;
94
95 return 0;
96}
97
98
99
100asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
101 unsigned long prot, unsigned long flags, unsigned long fd,
102 unsigned long pgoff)
103{
104
105
106 return sys_mmap_pgoff(addr, len, prot, flags, fd,
107 pgoff >> (PAGE_SHIFT - 12));
108}
109
110asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
111 unsigned long prot, unsigned long flags, unsigned long fd,
112 unsigned long off)
113{
114
115 return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
116}
117
118long sparc_remap_file_pages(unsigned long start, unsigned long size,
119 unsigned long prot, unsigned long pgoff,
120 unsigned long flags)
121{
122
123
124
125 return sys_remap_file_pages(start, size, prot,
126 (pgoff >> (PAGE_SHIFT - 12)), flags);
127}
128
129
130asmlinkage unsigned long
131c_sys_nis_syscall (struct pt_regs *regs)
132{
133 static int count = 0;
134
135 if (count++ > 5)
136 return -ENOSYS;
137 printk ("%s[%d]: Unimplemented SPARC system call %d\n",
138 current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
139#ifdef DEBUG_UNIMP_SYSCALL
140 show_regs (regs);
141#endif
142 return -ENOSYS;
143}
144
145
146
147asmlinkage void
148sparc_breakpoint (struct pt_regs *regs)
149{
150 siginfo_t info;
151
152#ifdef DEBUG_SPARC_BREAKPOINT
153 printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
154#endif
155 info.si_signo = SIGTRAP;
156 info.si_errno = 0;
157 info.si_code = TRAP_BRKPT;
158 info.si_addr = (void __user *)regs->pc;
159 info.si_trapno = 0;
160 force_sig_info(SIGTRAP, &info, current);
161
162#ifdef DEBUG_SPARC_BREAKPOINT
163 printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);
164#endif
165}
166
167SYSCALL_DEFINE3(sparc_sigaction, int, sig,
168 struct old_sigaction __user *,act,
169 struct old_sigaction __user *,oact)
170{
171 WARN_ON_ONCE(sig >= 0);
172 return sys_sigaction(-sig, act, oact);
173}
174
175SYSCALL_DEFINE5(rt_sigaction, int, sig,
176 const struct sigaction __user *, act,
177 struct sigaction __user *, oact,
178 void __user *, restorer,
179 size_t, sigsetsize)
180{
181 struct k_sigaction new_ka, old_ka;
182 int ret;
183
184
185 if (sigsetsize != sizeof(sigset_t))
186 return -EINVAL;
187
188 if (act) {
189 new_ka.ka_restorer = restorer;
190 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
191 return -EFAULT;
192 }
193
194 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
195
196 if (!ret && oact) {
197 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
198 return -EFAULT;
199 }
200
201 return ret;
202}
203
204asmlinkage long sys_getdomainname(char __user *name, int len)
205{
206 int nlen, err;
207
208 if (len < 0)
209 return -EINVAL;
210
211 down_read(&uts_sem);
212
213 nlen = strlen(utsname()->domainname) + 1;
214 err = -EINVAL;
215 if (nlen > len)
216 goto out;
217
218 err = -EFAULT;
219 if (!copy_to_user(name, utsname()->domainname, nlen))
220 err = 0;
221
222out:
223 up_read(&uts_sem);
224 return err;
225}
226