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>
29 #include <asm/uaccess.h>
31 #include <asm/utrap.h>
32 #include <asm/perfctr.h>
34 /* #define DEBUG_UNIMP_SYSCALL */
36 /* XXX Make this per-binary type, this way we can detect the type of
37 * XXX a binary. Every Sparc executable calls this very early on.
39 asmlinkage unsigned long sys_getpagesize(void)
44 #define COLOUR_ALIGN(addr,pgoff) \
45 ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
46 (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
48 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
50 struct mm_struct *mm = current->mm;
51 struct vm_area_struct * vma;
52 unsigned long task_size = TASK_SIZE;
53 unsigned long start_addr;
56 if (flags & MAP_FIXED) {
57 /* We do not accept a shared mapping if it would violate
58 * cache aliasing constraints.
60 if ((flags & MAP_SHARED) &&
61 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
66 if (test_thread_flag(TIF_32BIT))
67 task_size = 0xf0000000UL;
68 if (len > task_size || len > -PAGE_OFFSET)
72 if (filp || (flags & MAP_SHARED))
77 addr = COLOUR_ALIGN(addr, pgoff);
79 addr = PAGE_ALIGN(addr);
81 vma = find_vma(mm, addr);
82 if (task_size - len >= addr &&
83 (!vma || addr + len <= vma->vm_start))
87 start_addr = addr = mm->free_area_cache;
93 addr = COLOUR_ALIGN(addr, pgoff);
95 addr = PAGE_ALIGN(addr);
97 for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
98 /* At this point: (!vma || addr < vma->vm_end). */
99 if (addr < PAGE_OFFSET && -PAGE_OFFSET - len < addr) {
101 vma = find_vma(mm, PAGE_OFFSET);
103 if (task_size < addr) {
104 if (start_addr != TASK_UNMAPPED_BASE) {
105 start_addr = addr = TASK_UNMAPPED_BASE;
110 if (!vma || addr + len <= vma->vm_start) {
112 * Remember the place where we stopped the search:
114 mm->free_area_cache = addr + len;
119 addr = COLOUR_ALIGN(addr, pgoff);
123 /* Try to align mapping such that we align it as much as possible. */
124 unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
126 unsigned long align_goal, addr = -ENOMEM;
128 if (flags & MAP_FIXED) {
129 /* Ok, don't mess with it. */
130 return get_unmapped_area(NULL, addr, len, pgoff, flags);
132 flags &= ~MAP_SHARED;
134 align_goal = PAGE_SIZE;
135 if (len >= (4UL * 1024 * 1024))
136 align_goal = (4UL * 1024 * 1024);
137 else if (len >= (512UL * 1024))
138 align_goal = (512UL * 1024);
139 else if (len >= (64UL * 1024))
140 align_goal = (64UL * 1024);
143 addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
144 if (!(addr & ~PAGE_MASK)) {
145 addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
149 if (align_goal == (4UL * 1024 * 1024))
150 align_goal = (512UL * 1024);
151 else if (align_goal == (512UL * 1024))
152 align_goal = (64UL * 1024);
154 align_goal = PAGE_SIZE;
155 } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
157 /* Mapping is smaller than 64K or larger areas could not
160 if (addr & ~PAGE_MASK)
161 addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags);
166 asmlinkage unsigned long sparc_brk(unsigned long brk)
168 /* People could try to be nasty and use ta 0x6d in 32bit programs */
169 if (test_thread_flag(TIF_32BIT) &&
171 return current->mm->brk;
173 if ((current->mm->brk & PAGE_OFFSET) != (brk & PAGE_OFFSET))
174 return current->mm->brk;
179 * sys_pipe() is the normal C calling standard for creating
180 * a pipe. It's not the way unix traditionally does this, though.
182 asmlinkage long sparc_pipe(struct pt_regs *regs)
190 regs->u_regs[UREG_I1] = fd[1];
197 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
199 * This is really horribly ugly.
202 asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second,
203 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,
212 (unsigned)second, NULL);
215 err = sys_semtimedop(first, ptr, (unsigned)second,
216 (const struct timespec __user *) fifth);
219 err = sys_semget(first, (int)second, (int)third);
227 if (get_user(fourth.__pad,
228 (void __user * __user *) ptr))
230 err = sys_semctl(first, (int)second | IPC_64,
239 if (call <= MSGCTL) {
242 err = sys_msgsnd(first, ptr, (size_t)second,
246 err = sys_msgrcv(first, ptr, (size_t)second, fifth,
250 err = sys_msgget((key_t)first, (int)second);
253 err = sys_msgctl(first, (int)second | IPC_64, ptr);
260 if (call <= SHMCTL) {
264 err = do_shmat(first, ptr, (int)second, &raddr);
267 (ulong __user *) third))
273 err = sys_shmdt(ptr);
276 err = sys_shmget(first, (size_t)second, (int)third);
279 err = sys_shmctl(first, (int)second | IPC_64, ptr);
292 asmlinkage long sparc64_newuname(struct new_utsname __user *name)
294 int ret = sys_newuname(name);
296 if (current->personality == PER_LINUX32 && !ret) {
297 ret = (copy_to_user(name->machine, "sparc\0\0", 8)
303 asmlinkage long sparc64_personality(unsigned long personality)
307 if (current->personality == PER_LINUX32 &&
308 personality == PER_LINUX)
309 personality = PER_LINUX32;
310 ret = sys_personality(personality);
311 if (ret == PER_LINUX32)
317 /* Linux version of mmap */
318 asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
319 unsigned long prot, unsigned long flags, unsigned long fd,
322 struct file * file = NULL;
323 unsigned long retval = -EBADF;
325 if (!(flags & MAP_ANONYMOUS)) {
330 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
331 len = PAGE_ALIGN(len);
334 if (test_thread_flag(TIF_32BIT)) {
335 if (len > 0xf0000000UL ||
336 ((flags & MAP_FIXED) && addr > 0xf0000000UL - len))
339 if (len > -PAGE_OFFSET ||
340 ((flags & MAP_FIXED) &&
341 addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
345 down_write(¤t->mm->mmap_sem);
346 retval = do_mmap(file, addr, len, prot, flags, off);
347 up_write(¤t->mm->mmap_sem);
356 asmlinkage long sys64_munmap(unsigned long addr, size_t len)
360 if (len > -PAGE_OFFSET ||
361 (addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
363 down_write(¤t->mm->mmap_sem);
364 ret = do_munmap(current->mm, addr, len);
365 up_write(¤t->mm->mmap_sem);
369 extern unsigned long do_mremap(unsigned long addr,
370 unsigned long old_len, unsigned long new_len,
371 unsigned long flags, unsigned long new_addr);
373 asmlinkage unsigned long sys64_mremap(unsigned long addr,
374 unsigned long old_len, unsigned long new_len,
375 unsigned long flags, unsigned long new_addr)
377 struct vm_area_struct *vma;
378 unsigned long ret = -EINVAL;
379 if (test_thread_flag(TIF_32BIT))
381 if (old_len > -PAGE_OFFSET || new_len > -PAGE_OFFSET)
383 if (addr < PAGE_OFFSET && addr + old_len > -PAGE_OFFSET)
385 down_write(¤t->mm->mmap_sem);
386 if (flags & MREMAP_FIXED) {
387 if (new_addr < PAGE_OFFSET &&
388 new_addr + new_len > -PAGE_OFFSET)
390 } else if (addr < PAGE_OFFSET && addr + new_len > -PAGE_OFFSET) {
391 unsigned long map_flags = 0;
392 struct file *file = NULL;
395 if (!(flags & MREMAP_MAYMOVE))
398 vma = find_vma(current->mm, addr);
400 if (vma->vm_flags & VM_SHARED)
401 map_flags |= MAP_SHARED;
405 /* MREMAP_FIXED checked above. */
406 new_addr = get_unmapped_area(file, addr, new_len,
407 vma ? vma->vm_pgoff : 0,
410 if (new_addr & ~PAGE_MASK)
412 flags |= MREMAP_FIXED;
414 ret = do_mremap(addr, old_len, new_len, flags, new_addr);
416 up_write(¤t->mm->mmap_sem);
421 /* we come to here via sys_nis_syscall so it can setup the regs argument */
422 asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
426 /* Don't make the system unusable, if someone goes stuck */
430 printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
431 #ifdef DEBUG_UNIMP_SYSCALL
438 /* #define DEBUG_SPARC_BREAKPOINT */
440 asmlinkage void sparc_breakpoint(struct pt_regs *regs)
444 if (test_thread_flag(TIF_32BIT)) {
445 regs->tpc &= 0xffffffff;
446 regs->tnpc &= 0xffffffff;
448 #ifdef DEBUG_SPARC_BREAKPOINT
449 printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
451 info.si_signo = SIGTRAP;
453 info.si_code = TRAP_BRKPT;
454 info.si_addr = (void __user *)regs->tpc;
456 force_sig_info(SIGTRAP, &info, current);
457 #ifdef DEBUG_SPARC_BREAKPOINT
458 printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
462 extern void check_pending(int signum);
464 asmlinkage long sys_getdomainname(char __user *name, int len)
471 nlen = strlen(system_utsname.domainname) + 1;
475 if (len > __NEW_UTS_LEN)
477 if (copy_to_user(name, system_utsname.domainname, len))
485 asmlinkage long solaris_syscall(struct pt_regs *regs)
489 regs->tpc = regs->tnpc;
491 if (test_thread_flag(TIF_32BIT)) {
492 regs->tpc &= 0xffffffff;
493 regs->tnpc &= 0xffffffff;
496 printk ("For Solaris binary emulation you need solaris module loaded\n");
499 send_sig(SIGSEGV, current, 1);
504 #ifndef CONFIG_SUNOS_EMUL
505 asmlinkage long sunos_syscall(struct pt_regs *regs)
509 regs->tpc = regs->tnpc;
511 if (test_thread_flag(TIF_32BIT)) {
512 regs->tpc &= 0xffffffff;
513 regs->tnpc &= 0xffffffff;
516 printk ("SunOS binary emulation not compiled in\n");
517 force_sig(SIGSEGV, current);
523 asmlinkage long sys_utrap_install(utrap_entry_t type,
524 utrap_handler_t new_p,
525 utrap_handler_t new_d,
526 utrap_handler_t __user *old_p,
527 utrap_handler_t __user *old_d)
529 if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
531 if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) {
533 if (!current_thread_info()->utraps) {
534 if (put_user(NULL, old_p))
537 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
542 if (put_user(NULL, old_d))
547 if (!current_thread_info()->utraps) {
548 current_thread_info()->utraps =
549 kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
550 if (!current_thread_info()->utraps)
552 current_thread_info()->utraps[0] = 1;
553 memset(current_thread_info()->utraps+1, 0,
554 UT_TRAP_INSTRUCTION_31*sizeof(long));
556 if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p &&
557 current_thread_info()->utraps[0] > 1) {
558 long *p = current_thread_info()->utraps;
560 current_thread_info()->utraps =
561 kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long),
563 if (!current_thread_info()->utraps) {
564 current_thread_info()->utraps = p;
568 current_thread_info()->utraps[0] = 1;
569 memcpy(current_thread_info()->utraps+1, p+1,
570 UT_TRAP_INSTRUCTION_31*sizeof(long));
574 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
578 if (put_user(NULL, old_d))
581 current_thread_info()->utraps[type] = (long)new_p;
586 long sparc_memory_ordering(unsigned long model, struct pt_regs *regs)
590 regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14);
594 asmlinkage long sys_rt_sigaction(int sig,
595 const struct sigaction __user *act,
596 struct sigaction __user *oact,
597 void __user *restorer,
600 struct k_sigaction new_ka, old_ka;
603 /* XXX: Don't preclude handling different sized sigset_t's. */
604 if (sigsetsize != sizeof(sigset_t))
608 new_ka.ka_restorer = restorer;
609 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
613 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
616 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
623 /* Invoked by rtrap code to update performance counters in
626 asmlinkage void update_perfctrs(void)
628 unsigned long pic, tmp;
631 tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
632 __put_user(tmp, current_thread_info()->user_cntd0);
633 tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
634 __put_user(tmp, current_thread_info()->user_cntd1);
638 asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2)
644 current_thread_info()->pcr_reg = arg2;
645 current_thread_info()->user_cntd0 = (u64 __user *) arg0;
646 current_thread_info()->user_cntd1 = (u64 __user *) arg1;
647 current_thread_info()->kernel_cntd0 =
648 current_thread_info()->kernel_cntd1 = 0;
651 set_thread_flag(TIF_PERFCTR);
656 if (test_thread_flag(TIF_PERFCTR)) {
657 current_thread_info()->user_cntd0 =
658 current_thread_info()->user_cntd1 = NULL;
659 current_thread_info()->pcr_reg = 0;
661 clear_thread_flag(TIF_PERFCTR);
667 unsigned long pic, tmp;
669 if (!test_thread_flag(TIF_PERFCTR)) {
674 tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
675 err |= __put_user(tmp, current_thread_info()->user_cntd0);
676 tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
677 err |= __put_user(tmp, current_thread_info()->user_cntd1);
683 if (!test_thread_flag(TIF_PERFCTR)) {
687 current_thread_info()->kernel_cntd0 =
688 current_thread_info()->kernel_cntd1 = 0;
692 case PERFCTR_SETPCR: {
693 u64 __user *user_pcr = (u64 __user *)arg0;
695 if (!test_thread_flag(TIF_PERFCTR)) {
699 err |= __get_user(current_thread_info()->pcr_reg, user_pcr);
700 write_pcr(current_thread_info()->pcr_reg);
701 current_thread_info()->kernel_cntd0 =
702 current_thread_info()->kernel_cntd1 = 0;
707 case PERFCTR_GETPCR: {
708 u64 __user *user_pcr = (u64 __user *)arg0;
710 if (!test_thread_flag(TIF_PERFCTR)) {
714 err |= __put_user(current_thread_info()->pcr_reg, user_pcr);