1 /* $Id: sys_sparc.c,v 1.57 2002/02/09 19:49:30 davem Exp $
2 * linux/arch/sparc64/kernel/sys_sparc.c
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the Linux/sparc
9 #include <linux/config.h>
10 #include <linux/errno.h>
11 #include <linux/types.h>
12 #include <linux/sched.h>
14 #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/mman.h>
21 #include <linux/utsname.h>
22 #include <linux/smp.h>
23 #include <linux/smp_lock.h>
24 #include <linux/slab.h>
25 #include <linux/syscalls.h>
26 #include <linux/ipc.h>
27 #include <linux/personality.h>
28 #include <linux/vs_cvirt.h>
30 #include <asm/uaccess.h>
32 #include <asm/utrap.h>
33 #include <asm/perfctr.h>
35 /* #define DEBUG_UNIMP_SYSCALL */
37 /* XXX Make this per-binary type, this way we can detect the type of
38 * XXX a binary. Every Sparc executable calls this very early on.
40 asmlinkage unsigned long sys_getpagesize(void)
45 #define COLOUR_ALIGN(addr,pgoff) \
46 ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
47 (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
49 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
51 struct mm_struct *mm = current->mm;
52 struct vm_area_struct * vma;
53 unsigned long task_size = TASK_SIZE;
54 unsigned long start_addr;
57 if (flags & MAP_FIXED) {
58 /* We do not accept a shared mapping if it would violate
59 * cache aliasing constraints.
61 if ((flags & MAP_SHARED) &&
62 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
67 if (test_thread_flag(TIF_32BIT))
68 task_size = 0xf0000000UL;
69 if (len > task_size || len > -PAGE_OFFSET)
73 if (filp || (flags & MAP_SHARED))
78 addr = COLOUR_ALIGN(addr, pgoff);
80 addr = PAGE_ALIGN(addr);
82 vma = find_vma(mm, addr);
83 if (task_size - len >= addr &&
84 (!vma || addr + len <= vma->vm_start))
88 start_addr = addr = mm->free_area_cache;
94 addr = COLOUR_ALIGN(addr, pgoff);
96 addr = PAGE_ALIGN(addr);
98 for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
99 /* At this point: (!vma || addr < vma->vm_end). */
100 if (addr < PAGE_OFFSET && -PAGE_OFFSET - len < addr) {
102 vma = find_vma(mm, PAGE_OFFSET);
104 if (task_size < addr) {
105 if (start_addr != TASK_UNMAPPED_BASE) {
106 start_addr = addr = TASK_UNMAPPED_BASE;
111 if (!vma || addr + len <= vma->vm_start) {
113 * Remember the place where we stopped the search:
115 mm->free_area_cache = addr + len;
120 addr = COLOUR_ALIGN(addr, pgoff);
124 /* Try to align mapping such that we align it as much as possible. */
125 unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
127 unsigned long align_goal, addr = -ENOMEM;
129 if (flags & MAP_FIXED) {
130 /* Ok, don't mess with it. */
131 return get_unmapped_area(NULL, addr, len, pgoff, flags, 0);
133 flags &= ~MAP_SHARED;
135 align_goal = PAGE_SIZE;
136 if (len >= (4UL * 1024 * 1024))
137 align_goal = (4UL * 1024 * 1024);
138 else if (len >= (512UL * 1024))
139 align_goal = (512UL * 1024);
140 else if (len >= (64UL * 1024))
141 align_goal = (64UL * 1024);
144 addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags, 0);
145 if (!(addr & ~PAGE_MASK)) {
146 addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
150 if (align_goal == (4UL * 1024 * 1024))
151 align_goal = (512UL * 1024);
152 else if (align_goal == (512UL * 1024))
153 align_goal = (64UL * 1024);
155 align_goal = PAGE_SIZE;
156 } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
158 /* Mapping is smaller than 64K or larger areas could not
161 if (addr & ~PAGE_MASK)
162 addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags, 0);
167 asmlinkage unsigned long sparc_brk(unsigned long brk)
169 /* People could try to be nasty and use ta 0x6d in 32bit programs */
170 if (test_thread_flag(TIF_32BIT) &&
172 return current->mm->brk;
174 if ((current->mm->brk & PAGE_OFFSET) != (brk & PAGE_OFFSET))
175 return current->mm->brk;
180 * sys_pipe() is the normal C calling standard for creating
181 * a pipe. It's not the way unix traditionally does this, though.
183 asmlinkage long sparc_pipe(struct pt_regs *regs)
191 regs->u_regs[UREG_I1] = fd[1];
198 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
200 * This is really horribly ugly.
203 asmlinkage long sys_ipc(unsigned int call, int first, int second, unsigned long third, void __user *ptr, long fifth)
207 /* No need for backward compatibility. We can start fresh... */
208 if (call <= SEMCTL) {
211 err = sys_semtimedop(first, ptr, second, NULL);
214 err = sys_semtimedop(first, ptr, second,
215 (const struct timespec __user *) fifth);
218 err = sys_semget(first, second, (int)third);
226 if (get_user(fourth.__pad,
227 (void __user * __user *) ptr))
229 err = sys_semctl(first, second | IPC_64,
238 if (call <= MSGCTL) {
241 err = sys_msgsnd(first, ptr, second, (int)third);
244 err = sys_msgrcv(first, ptr, second, fifth,
248 err = sys_msgget((key_t) first, second);
251 err = sys_msgctl(first, second | IPC_64, ptr);
258 if (call <= SHMCTL) {
262 err = do_shmat(first, ptr, second, &raddr);
265 (ulong __user *) third))
271 err = sys_shmdt(ptr);
274 err = sys_shmget(first, second, (int)third);
277 err = sys_shmctl(first, second | IPC_64, ptr);
290 asmlinkage long sparc64_newuname(struct new_utsname __user *name)
292 int ret = sys_newuname(name);
294 if (current->personality == PER_LINUX32 && !ret) {
295 ret = (copy_to_user(name->machine, "sparc\0\0", 8)
301 asmlinkage long sparc64_personality(unsigned long personality)
305 if (current->personality == PER_LINUX32 &&
306 personality == PER_LINUX)
307 personality = PER_LINUX32;
308 ret = sys_personality(personality);
309 if (ret == PER_LINUX32)
315 /* Linux version of mmap */
316 asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
317 unsigned long prot, unsigned long flags, unsigned long fd,
320 struct file * file = NULL;
321 unsigned long retval = -EBADF;
323 if (!(flags & MAP_ANONYMOUS)) {
328 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
329 len = PAGE_ALIGN(len);
332 if (test_thread_flag(TIF_32BIT)) {
333 if (len > 0xf0000000UL ||
334 ((flags & MAP_FIXED) && addr > 0xf0000000UL - len))
337 if (len > -PAGE_OFFSET ||
338 ((flags & MAP_FIXED) &&
339 addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
343 down_write(¤t->mm->mmap_sem);
344 retval = do_mmap(file, addr, len, prot, flags, off);
345 up_write(¤t->mm->mmap_sem);
354 asmlinkage long sys64_munmap(unsigned long addr, size_t len)
358 if (len > -PAGE_OFFSET ||
359 (addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
361 down_write(¤t->mm->mmap_sem);
362 ret = do_munmap(current->mm, addr, len);
363 up_write(¤t->mm->mmap_sem);
367 extern unsigned long do_mremap(unsigned long addr,
368 unsigned long old_len, unsigned long new_len,
369 unsigned long flags, unsigned long new_addr);
371 asmlinkage unsigned long sys64_mremap(unsigned long addr,
372 unsigned long old_len, unsigned long new_len,
373 unsigned long flags, unsigned long new_addr)
375 struct vm_area_struct *vma;
376 unsigned long ret = -EINVAL;
377 if (test_thread_flag(TIF_32BIT))
379 if (old_len > -PAGE_OFFSET || new_len > -PAGE_OFFSET)
381 if (addr < PAGE_OFFSET && addr + old_len > -PAGE_OFFSET)
383 down_write(¤t->mm->mmap_sem);
384 if (flags & MREMAP_FIXED) {
385 if (new_addr < PAGE_OFFSET &&
386 new_addr + new_len > -PAGE_OFFSET)
388 } else if (addr < PAGE_OFFSET && addr + new_len > -PAGE_OFFSET) {
389 unsigned long map_flags = 0;
390 struct file *file = NULL;
393 if (!(flags & MREMAP_MAYMOVE))
396 vma = find_vma(current->mm, addr);
398 if (vma->vm_flags & VM_SHARED)
399 map_flags |= MAP_SHARED;
403 /* MREMAP_FIXED checked above. */
404 new_addr = get_unmapped_area(file, addr, new_len,
405 vma ? vma->vm_pgoff : 0,
406 map_flags, vma->vm_flags & VM_EXEC);
408 if (new_addr & ~PAGE_MASK)
410 flags |= MREMAP_FIXED;
412 ret = do_mremap(addr, old_len, new_len, flags, new_addr);
414 up_write(¤t->mm->mmap_sem);
419 /* we come to here via sys_nis_syscall so it can setup the regs argument */
420 asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
424 /* Don't make the system unusable, if someone goes stuck */
428 printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
429 #ifdef DEBUG_UNIMP_SYSCALL
436 /* #define DEBUG_SPARC_BREAKPOINT */
438 asmlinkage void sparc_breakpoint(struct pt_regs *regs)
442 if (test_thread_flag(TIF_32BIT)) {
443 regs->tpc &= 0xffffffff;
444 regs->tnpc &= 0xffffffff;
446 #ifdef DEBUG_SPARC_BREAKPOINT
447 printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
449 info.si_signo = SIGTRAP;
451 info.si_code = TRAP_BRKPT;
452 info.si_addr = (void __user *)regs->tpc;
454 force_sig_info(SIGTRAP, &info, current);
455 #ifdef DEBUG_SPARC_BREAKPOINT
456 printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
460 extern void check_pending(int signum);
462 asmlinkage long sys_getdomainname(char __user *name, int len)
469 nlen = strlen(vx_new_uts(domainname)) + 1;
473 if (len > __NEW_UTS_LEN)
475 if (copy_to_user(name, vx_new_uts(domainname), len))
483 asmlinkage long solaris_syscall(struct pt_regs *regs)
487 regs->tpc = regs->tnpc;
489 if (test_thread_flag(TIF_32BIT)) {
490 regs->tpc &= 0xffffffff;
491 regs->tnpc &= 0xffffffff;
494 printk ("For Solaris binary emulation you need solaris module loaded\n");
497 send_sig(SIGSEGV, current, 1);
502 #ifndef CONFIG_SUNOS_EMUL
503 asmlinkage long sunos_syscall(struct pt_regs *regs)
507 regs->tpc = regs->tnpc;
509 if (test_thread_flag(TIF_32BIT)) {
510 regs->tpc &= 0xffffffff;
511 regs->tnpc &= 0xffffffff;
514 printk ("SunOS binary emulation not compiled in\n");
515 force_sig(SIGSEGV, current);
521 asmlinkage long sys_utrap_install(utrap_entry_t type,
522 utrap_handler_t new_p,
523 utrap_handler_t new_d,
524 utrap_handler_t __user *old_p,
525 utrap_handler_t __user *old_d)
527 if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
529 if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) {
531 if (!current_thread_info()->utraps) {
532 if (put_user(NULL, old_p))
535 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
540 if (put_user(NULL, old_d))
545 if (!current_thread_info()->utraps) {
546 current_thread_info()->utraps =
547 kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
548 if (!current_thread_info()->utraps)
550 current_thread_info()->utraps[0] = 1;
551 memset(current_thread_info()->utraps+1, 0,
552 UT_TRAP_INSTRUCTION_31*sizeof(long));
554 if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p &&
555 current_thread_info()->utraps[0] > 1) {
556 long *p = current_thread_info()->utraps;
558 current_thread_info()->utraps =
559 kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long),
561 if (!current_thread_info()->utraps) {
562 current_thread_info()->utraps = p;
566 current_thread_info()->utraps[0] = 1;
567 memcpy(current_thread_info()->utraps+1, p+1,
568 UT_TRAP_INSTRUCTION_31*sizeof(long));
572 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
576 if (put_user(NULL, old_d))
579 current_thread_info()->utraps[type] = (long)new_p;
584 long sparc_memory_ordering(unsigned long model, struct pt_regs *regs)
588 regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14);
592 asmlinkage long sys_rt_sigaction(int sig,
593 const struct sigaction __user *act,
594 struct sigaction __user *oact,
595 void __user *restorer,
598 struct k_sigaction new_ka, old_ka;
601 /* XXX: Don't preclude handling different sized sigset_t's. */
602 if (sigsetsize != sizeof(sigset_t))
606 new_ka.ka_restorer = restorer;
607 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
611 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
614 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
621 /* Invoked by rtrap code to update performance counters in
624 asmlinkage void update_perfctrs(void)
626 unsigned long pic, tmp;
629 tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
630 __put_user(tmp, current_thread_info()->user_cntd0);
631 tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
632 __put_user(tmp, current_thread_info()->user_cntd1);
636 asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2)
642 current_thread_info()->pcr_reg = arg2;
643 current_thread_info()->user_cntd0 = (u64 __user *) arg0;
644 current_thread_info()->user_cntd1 = (u64 __user *) arg1;
645 current_thread_info()->kernel_cntd0 =
646 current_thread_info()->kernel_cntd1 = 0;
649 set_thread_flag(TIF_PERFCTR);
654 if (test_thread_flag(TIF_PERFCTR)) {
655 current_thread_info()->user_cntd0 =
656 current_thread_info()->user_cntd1 = NULL;
657 current_thread_info()->pcr_reg = 0;
659 clear_thread_flag(TIF_PERFCTR);
665 unsigned long pic, tmp;
667 if (!test_thread_flag(TIF_PERFCTR)) {
672 tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
673 err |= __put_user(tmp, current_thread_info()->user_cntd0);
674 tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
675 err |= __put_user(tmp, current_thread_info()->user_cntd1);
681 if (!test_thread_flag(TIF_PERFCTR)) {
685 current_thread_info()->kernel_cntd0 =
686 current_thread_info()->kernel_cntd1 = 0;
690 case PERFCTR_SETPCR: {
691 u64 __user *user_pcr = (u64 __user *)arg0;
693 if (!test_thread_flag(TIF_PERFCTR)) {
697 err |= __get_user(current_thread_info()->pcr_reg, user_pcr);
698 write_pcr(current_thread_info()->pcr_reg);
699 current_thread_info()->kernel_cntd0 =
700 current_thread_info()->kernel_cntd1 = 0;
705 case PERFCTR_GETPCR: {
706 u64 __user *user_pcr = (u64 __user *)arg0;
708 if (!test_thread_flag(TIF_PERFCTR)) {
712 err |= __put_user(current_thread_info()->pcr_reg, user_pcr);