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authorSam Ravnborg <sam@ravnborg.org>2008-12-03 06:08:37 -0500
committerDavid S. Miller <davem@davemloft.net>2008-12-04 12:17:20 -0500
commitd670bd4f803c8b646acd20f3ba21e65458293faf (patch)
treeeabc30aadce1556023c4aa445c649ba9e1d3f352 /arch/sparc/kernel/sys_sparc.c
parent478b8fecda511942404ac232897a718cecd13e48 (diff)
sparc: prepare kernel/ for unification
o sparc32 files with identical names to sparc64 renamed to <name>_32.S o introduced a few Kconfig helpers to simplify Makefile logic o refactored Makefile to prepare for unification - use obj-$(CONFIG_SPARC32) for sparc32 specific files - use <name>_$(BITS) for files where sparc64 has a _64 variant - sparc64 directly include a few files where sparc32 builds them, refer to these files directly (no BITS) - sneaked in -Werror as used by sparc64 o modified sparc/Makefile to use the new names for head/init_task Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/sys_sparc.c')
-rw-r--r--arch/sparc/kernel/sys_sparc.c466
1 files changed, 0 insertions, 466 deletions
diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
deleted file mode 100644
index 03035c852a43..000000000000
--- a/arch/sparc/kernel/sys_sparc.c
+++ /dev/null
@@ -1,466 +0,0 @@
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/smp_lock.h>
23#include <linux/ipc.h>
24
25#include <asm/uaccess.h>
26#include <asm/unistd.h>
27
28/* #define DEBUG_UNIMP_SYSCALL */
29
30/* XXX Make this per-binary type, this way we can detect the type of
31 * XXX a binary. Every Sparc executable calls this very early on.
32 */
33asmlinkage unsigned long sys_getpagesize(void)
34{
35 return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */
36}
37
38#define COLOUR_ALIGN(addr) (((addr)+SHMLBA-1)&~(SHMLBA-1))
39
40unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
41{
42 struct vm_area_struct * vmm;
43
44 if (flags & MAP_FIXED) {
45 /* We do not accept a shared mapping if it would violate
46 * cache aliasing constraints.
47 */
48 if ((flags & MAP_SHARED) && (addr & (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 (ARCH_SUN4C && len > 0x20000000)
57 return -ENOMEM;
58 if (!addr)
59 addr = TASK_UNMAPPED_BASE;
60
61 if (flags & MAP_SHARED)
62 addr = COLOUR_ALIGN(addr);
63 else
64 addr = PAGE_ALIGN(addr);
65
66 for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
67 /* At this point: (!vmm || addr < vmm->vm_end). */
68 if (ARCH_SUN4C && addr < 0xe0000000 && 0x20000000 - len < addr) {
69 addr = PAGE_OFFSET;
70 vmm = find_vma(current->mm, PAGE_OFFSET);
71 }
72 if (TASK_SIZE - PAGE_SIZE - len < addr)
73 return -ENOMEM;
74 if (!vmm || addr + len <= vmm->vm_start)
75 return addr;
76 addr = vmm->vm_end;
77 if (flags & MAP_SHARED)
78 addr = COLOUR_ALIGN(addr);
79 }
80}
81
82asmlinkage unsigned long sparc_brk(unsigned long brk)
83{
84 if(ARCH_SUN4C) {
85 if ((brk & 0xe0000000) != (current->mm->brk & 0xe0000000))
86 return current->mm->brk;
87 }
88 return sys_brk(brk);
89}
90
91/*
92 * sys_pipe() is the normal C calling standard for creating
93 * a pipe. It's not the way unix traditionally does this, though.
94 */
95asmlinkage int sparc_pipe(struct pt_regs *regs)
96{
97 int fd[2];
98 int error;
99
100 error = do_pipe_flags(fd, 0);
101 if (error)
102 goto out;
103 regs->u_regs[UREG_I1] = fd[1];
104 error = fd[0];
105out:
106 return error;
107}
108
109/*
110 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
111 *
112 * This is really horribly ugly.
113 */
114
115asmlinkage int sys_ipc (uint call, int first, int second, int third, void __user *ptr, long fifth)
116{
117 int version, err;
118
119 version = call >> 16; /* hack for backward compatibility */
120 call &= 0xffff;
121
122 if (call <= SEMCTL)
123 switch (call) {
124 case SEMOP:
125 err = sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL);
126 goto out;
127 case SEMTIMEDOP:
128 err = sys_semtimedop (first, (struct sembuf __user *)ptr, second, (const struct timespec __user *) fifth);
129 goto out;
130 case SEMGET:
131 err = sys_semget (first, second, third);
132 goto out;
133 case SEMCTL: {
134 union semun fourth;
135 err = -EINVAL;
136 if (!ptr)
137 goto out;
138 err = -EFAULT;
139 if (get_user(fourth.__pad,
140 (void __user * __user *)ptr))
141 goto out;
142 err = sys_semctl (first, second, third, fourth);
143 goto out;
144 }
145 default:
146 err = -ENOSYS;
147 goto out;
148 }
149 if (call <= MSGCTL)
150 switch (call) {
151 case MSGSND:
152 err = sys_msgsnd (first, (struct msgbuf __user *) ptr,
153 second, third);
154 goto out;
155 case MSGRCV:
156 switch (version) {
157 case 0: {
158 struct ipc_kludge tmp;
159 err = -EINVAL;
160 if (!ptr)
161 goto out;
162 err = -EFAULT;
163 if (copy_from_user(&tmp, (struct ipc_kludge __user *) ptr, sizeof (tmp)))
164 goto out;
165 err = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third);
166 goto out;
167 }
168 case 1: default:
169 err = sys_msgrcv (first,
170 (struct msgbuf __user *) ptr,
171 second, fifth, third);
172 goto out;
173 }
174 case MSGGET:
175 err = sys_msgget ((key_t) first, second);
176 goto out;
177 case MSGCTL:
178 err = sys_msgctl (first, second, (struct msqid_ds __user *) ptr);
179 goto out;
180 default:
181 err = -ENOSYS;
182 goto out;
183 }
184 if (call <= SHMCTL)
185 switch (call) {
186 case SHMAT:
187 switch (version) {
188 case 0: default: {
189 ulong raddr;
190 err = do_shmat (first, (char __user *) ptr, second, &raddr);
191 if (err)
192 goto out;
193 err = -EFAULT;
194 if (put_user (raddr, (ulong __user *) third))
195 goto out;
196 err = 0;
197 goto out;
198 }
199 case 1: /* iBCS2 emulator entry point */
200 err = -EINVAL;
201 goto out;
202 }
203 case SHMDT:
204 err = sys_shmdt ((char __user *)ptr);
205 goto out;
206 case SHMGET:
207 err = sys_shmget (first, second, third);
208 goto out;
209 case SHMCTL:
210 err = sys_shmctl (first, second, (struct shmid_ds __user *) ptr);
211 goto out;
212 default:
213 err = -ENOSYS;
214 goto out;
215 }
216 else
217 err = -ENOSYS;
218out:
219 return err;
220}
221
222int sparc_mmap_check(unsigned long addr, unsigned long len)
223{
224 if (ARCH_SUN4C &&
225 (len > 0x20000000 ||
226 (addr < 0xe0000000 && addr + len > 0x20000000)))
227 return -EINVAL;
228
229 /* See asm-sparc/uaccess.h */
230 if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
231 return -EINVAL;
232
233 return 0;
234}
235
236/* Linux version of mmap */
237static unsigned long do_mmap2(unsigned long addr, unsigned long len,
238 unsigned long prot, unsigned long flags, unsigned long fd,
239 unsigned long pgoff)
240{
241 struct file * file = NULL;
242 unsigned long retval = -EBADF;
243
244 if (!(flags & MAP_ANONYMOUS)) {
245 file = fget(fd);
246 if (!file)
247 goto out;
248 }
249
250 len = PAGE_ALIGN(len);
251 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
252
253 down_write(&current->mm->mmap_sem);
254 retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
255 up_write(&current->mm->mmap_sem);
256
257 if (file)
258 fput(file);
259out:
260 return retval;
261}
262
263asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
264 unsigned long prot, unsigned long flags, unsigned long fd,
265 unsigned long pgoff)
266{
267 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
268 we have. */
269 return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));
270}
271
272asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
273 unsigned long prot, unsigned long flags, unsigned long fd,
274 unsigned long off)
275{
276 return do_mmap2(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
277}
278
279long sparc_remap_file_pages(unsigned long start, unsigned long size,
280 unsigned long prot, unsigned long pgoff,
281 unsigned long flags)
282{
283 /* This works on an existing mmap so we don't need to validate
284 * the range as that was done at the original mmap call.
285 */
286 return sys_remap_file_pages(start, size, prot,
287 (pgoff >> (PAGE_SHIFT - 12)), flags);
288}
289
290extern unsigned long do_mremap(unsigned long addr,
291 unsigned long old_len, unsigned long new_len,
292 unsigned long flags, unsigned long new_addr);
293
294asmlinkage unsigned long sparc_mremap(unsigned long addr,
295 unsigned long old_len, unsigned long new_len,
296 unsigned long flags, unsigned long new_addr)
297{
298 unsigned long ret = -EINVAL;
299
300 if (unlikely(sparc_mmap_check(addr, old_len)))
301 goto out;
302 if (unlikely(sparc_mmap_check(new_addr, new_len)))
303 goto out;
304 down_write(&current->mm->mmap_sem);
305 ret = do_mremap(addr, old_len, new_len, flags, new_addr);
306 up_write(&current->mm->mmap_sem);
307out:
308 return ret;
309}
310
311/* we come to here via sys_nis_syscall so it can setup the regs argument */
312asmlinkage unsigned long
313c_sys_nis_syscall (struct pt_regs *regs)
314{
315 static int count = 0;
316
317 if (count++ > 5)
318 return -ENOSYS;
319 printk ("%s[%d]: Unimplemented SPARC system call %d\n",
320 current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
321#ifdef DEBUG_UNIMP_SYSCALL
322 show_regs (regs);
323#endif
324 return -ENOSYS;
325}
326
327/* #define DEBUG_SPARC_BREAKPOINT */
328
329asmlinkage void
330sparc_breakpoint (struct pt_regs *regs)
331{
332 siginfo_t info;
333
334 lock_kernel();
335#ifdef DEBUG_SPARC_BREAKPOINT
336 printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
337#endif
338 info.si_signo = SIGTRAP;
339 info.si_errno = 0;
340 info.si_code = TRAP_BRKPT;
341 info.si_addr = (void __user *)regs->pc;
342 info.si_trapno = 0;
343 force_sig_info(SIGTRAP, &info, current);
344
345#ifdef DEBUG_SPARC_BREAKPOINT
346 printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);
347#endif
348 unlock_kernel();
349}
350
351asmlinkage int
352sparc_sigaction (int sig, const struct old_sigaction __user *act,
353 struct old_sigaction __user *oact)
354{
355 struct k_sigaction new_ka, old_ka;
356 int ret;
357
358 WARN_ON_ONCE(sig >= 0);
359 sig = -sig;
360
361 if (act) {
362 unsigned long mask;
363
364 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
365 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
366 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
367 return -EFAULT;
368 __get_user(new_ka.sa.sa_flags, &act->sa_flags);
369 __get_user(mask, &act->sa_mask);
370 siginitset(&new_ka.sa.sa_mask, mask);
371 new_ka.ka_restorer = NULL;
372 }
373
374 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
375
376 if (!ret && oact) {
377 /* In the clone() case we could copy half consistent
378 * state to the user, however this could sleep and
379 * deadlock us if we held the signal lock on SMP. So for
380 * now I take the easy way out and do no locking.
381 */
382 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
383 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
384 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
385 return -EFAULT;
386 __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
387 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
388 }
389
390 return ret;
391}
392
393asmlinkage long
394sys_rt_sigaction(int sig,
395 const struct sigaction __user *act,
396 struct sigaction __user *oact,
397 void __user *restorer,
398 size_t sigsetsize)
399{
400 struct k_sigaction new_ka, old_ka;
401 int ret;
402
403 /* XXX: Don't preclude handling different sized sigset_t's. */
404 if (sigsetsize != sizeof(sigset_t))
405 return -EINVAL;
406
407 if (act) {
408 new_ka.ka_restorer = restorer;
409 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
410 return -EFAULT;
411 }
412
413 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
414
415 if (!ret && oact) {
416 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
417 return -EFAULT;
418 }
419
420 return ret;
421}
422
423asmlinkage int sys_getdomainname(char __user *name, int len)
424{
425 int nlen, err;
426
427 if (len < 0)
428 return -EINVAL;
429
430 down_read(&uts_sem);
431
432 nlen = strlen(utsname()->domainname) + 1;
433 err = -EINVAL;
434 if (nlen > len)
435 goto out;
436
437 err = -EFAULT;
438 if (!copy_to_user(name, utsname()->domainname, nlen))
439 err = 0;
440
441out:
442 up_read(&uts_sem);
443 return err;
444}
445
446/*
447 * Do a system call from kernel instead of calling sys_execve so we
448 * end up with proper pt_regs.
449 */
450int kernel_execve(const char *filename, char *const argv[], char *const envp[])
451{
452 long __res;
453 register long __g1 __asm__ ("g1") = __NR_execve;
454 register long __o0 __asm__ ("o0") = (long)(filename);
455 register long __o1 __asm__ ("o1") = (long)(argv);
456 register long __o2 __asm__ ("o2") = (long)(envp);
457 asm volatile ("t 0x10\n\t"
458 "bcc 1f\n\t"
459 "mov %%o0, %0\n\t"
460 "sub %%g0, %%o0, %0\n\t"
461 "1:\n\t"
462 : "=r" (__res), "=&r" (__o0)
463 : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)
464 : "cc");
465 return __res;
466}
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