Loading...
1/* linux/arch/sparc/kernel/sys_sparc.c
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>
22#include <linux/ipc.h>
23
24#include <asm/uaccess.h>
25#include <asm/unistd.h>
26
27#include "systbls.h"
28
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 */
34asmlinkage unsigned long sys_getpagesize(void)
35{
36 return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */
37}
38
39unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
40{
41 struct vm_unmapped_area_info info;
42
43 if (flags & MAP_FIXED) {
44 /* We do not accept a shared mapping if it would violate
45 * cache aliasing constraints.
46 */
47 if ((flags & MAP_SHARED) &&
48 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
49 return -EINVAL;
50 return addr;
51 }
52
53 /* See asm-sparc/uaccess.h */
54 if (len > TASK_SIZE - PAGE_SIZE)
55 return -ENOMEM;
56 if (!addr)
57 addr = TASK_UNMAPPED_BASE;
58
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);
67}
68
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 */
73asmlinkage long sparc_pipe(struct pt_regs *regs)
74{
75 int fd[2];
76 int error;
77
78 error = do_pipe_flags(fd, 0);
79 if (error)
80 goto out;
81 regs->u_regs[UREG_I1] = fd[1];
82 error = fd[0];
83out:
84 return error;
85}
86
87int sparc_mmap_check(unsigned long addr, unsigned long len)
88{
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
96/* Linux version of mmap */
97
98asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
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. */
104 return sys_mmap_pgoff(addr, len, prot, flags, fd,
105 pgoff >> (PAGE_SHIFT - 12));
106}
107
108asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
109 unsigned long prot, unsigned long flags, unsigned long fd,
110 unsigned long off)
111{
112 /* no alignment check? */
113 return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
114}
115
116long 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
127/* we come to here via sys_nis_syscall so it can setup the regs argument */
128asmlinkage unsigned long
129c_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",
136 current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
137#ifdef DEBUG_UNIMP_SYSCALL
138 show_regs (regs);
139#endif
140 return -ENOSYS;
141}
142
143/* #define DEBUG_SPARC_BREAKPOINT */
144
145asmlinkage void
146sparc_breakpoint (struct pt_regs *regs)
147{
148 siginfo_t info;
149
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
163}
164
165SYSCALL_DEFINE3(sparc_sigaction, int, sig,
166 struct old_sigaction __user *,act,
167 struct old_sigaction __user *,oact)
168{
169 WARN_ON_ONCE(sig >= 0);
170 return sys_sigaction(-sig, act, oact);
171}
172
173SYSCALL_DEFINE5(rt_sigaction, int, sig,
174 const struct sigaction __user *, act,
175 struct sigaction __user *, oact,
176 void __user *, restorer,
177 size_t, sigsetsize)
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
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
202asmlinkage long sys_getdomainname(char __user *name, int len)
203{
204 int nlen, err;
205
206 if (len < 0)
207 return -EINVAL;
208
209 down_read(&uts_sem);
210
211 nlen = strlen(utsname()->domainname) + 1;
212 err = -EINVAL;
213 if (nlen > len)
214 goto out;
215
216 err = -EFAULT;
217 if (!copy_to_user(name, utsname()->domainname, nlen))
218 err = 0;
219
220out:
221 up_read(&uts_sem);
222 return err;
223}
1/* linux/arch/sparc/kernel/sys_sparc.c
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>
22#include <linux/ipc.h>
23
24#include <asm/uaccess.h>
25#include <asm/unistd.h>
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 */
32asmlinkage unsigned long sys_getpagesize(void)
33{
34 return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */
35}
36
37unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
38{
39 struct vm_unmapped_area_info info;
40
41 if (flags & MAP_FIXED) {
42 /* We do not accept a shared mapping if it would violate
43 * cache aliasing constraints.
44 */
45 if ((flags & MAP_SHARED) &&
46 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
47 return -EINVAL;
48 return addr;
49 }
50
51 /* See asm-sparc/uaccess.h */
52 if (len > TASK_SIZE - PAGE_SIZE)
53 return -ENOMEM;
54 if (!addr)
55 addr = TASK_UNMAPPED_BASE;
56
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);
65}
66
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 */
71asmlinkage int sparc_pipe(struct pt_regs *regs)
72{
73 int fd[2];
74 int error;
75
76 error = do_pipe_flags(fd, 0);
77 if (error)
78 goto out;
79 regs->u_regs[UREG_I1] = fd[1];
80 error = fd[0];
81out:
82 return error;
83}
84
85int sparc_mmap_check(unsigned long addr, unsigned long len)
86{
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
94/* Linux version of mmap */
95
96asmlinkage 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. */
102 return sys_mmap_pgoff(addr, len, prot, flags, fd,
103 pgoff >> (PAGE_SHIFT - 12));
104}
105
106asmlinkage 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{
110 /* no alignment check? */
111 return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
112}
113
114long 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
125/* we come to here via sys_nis_syscall so it can setup the regs argument */
126asmlinkage unsigned long
127c_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",
134 current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
135#ifdef DEBUG_UNIMP_SYSCALL
136 show_regs (regs);
137#endif
138 return -ENOSYS;
139}
140
141/* #define DEBUG_SPARC_BREAKPOINT */
142
143asmlinkage void
144sparc_breakpoint (struct pt_regs *regs)
145{
146 siginfo_t info;
147
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
161}
162
163SYSCALL_DEFINE3(sparc_sigaction, int, sig,
164 struct old_sigaction __user *,act,
165 struct old_sigaction __user *,oact)
166{
167 WARN_ON_ONCE(sig >= 0);
168 return sys_sigaction(-sig, act, oact);
169}
170
171SYSCALL_DEFINE5(rt_sigaction, int, sig,
172 const struct sigaction __user *, act,
173 struct sigaction __user *, oact,
174 void __user *, restorer,
175 size_t, sigsetsize)
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
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
200asmlinkage int sys_getdomainname(char __user *name, int len)
201{
202 int nlen, err;
203
204 if (len < 0)
205 return -EINVAL;
206
207 down_read(&uts_sem);
208
209 nlen = strlen(utsname()->domainname) + 1;
210 err = -EINVAL;
211 if (nlen > len)
212 goto out;
213
214 err = -EFAULT;
215 if (!copy_to_user(name, utsname()->domainname, nlen))
216 err = 0;
217
218out:
219 up_read(&uts_sem);
220 return err;
221}