732 lines
17 KiB
C
732 lines
17 KiB
C
/* $Id: sys_sparc.c,v 1.57 2002/02/09 19:49:30 davem Exp $
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* linux/arch/sparc64/kernel/sys_sparc.c
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*
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* This file contains various random system calls that
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* have a non-standard calling sequence on the Linux/sparc
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* platform.
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*/
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/mm.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/stat.h>
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#include <linux/mman.h>
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#include <linux/utsname.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/slab.h>
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#include <linux/syscalls.h>
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#include <linux/ipc.h>
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#include <linux/personality.h>
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#include <asm/uaccess.h>
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#include <asm/ipc.h>
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#include <asm/utrap.h>
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#include <asm/perfctr.h>
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/* #define DEBUG_UNIMP_SYSCALL */
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/* XXX Make this per-binary type, this way we can detect the type of
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* XXX a binary. Every Sparc executable calls this very early on.
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*/
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asmlinkage unsigned long sys_getpagesize(void)
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{
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return PAGE_SIZE;
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}
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#define COLOUR_ALIGN(addr,pgoff) \
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((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
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(((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
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unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
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{
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struct mm_struct *mm = current->mm;
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struct vm_area_struct * vma;
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unsigned long task_size = TASK_SIZE;
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unsigned long start_addr;
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int do_color_align;
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if (flags & MAP_FIXED) {
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/* We do not accept a shared mapping if it would violate
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* cache aliasing constraints.
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*/
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if ((flags & MAP_SHARED) &&
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((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
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return -EINVAL;
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return addr;
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}
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if (test_thread_flag(TIF_32BIT))
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task_size = 0xf0000000UL;
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if (len > task_size || len > -PAGE_OFFSET)
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return -ENOMEM;
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do_color_align = 0;
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if (filp || (flags & MAP_SHARED))
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do_color_align = 1;
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if (addr) {
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if (do_color_align)
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addr = COLOUR_ALIGN(addr, pgoff);
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else
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addr = PAGE_ALIGN(addr);
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vma = find_vma(mm, addr);
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if (task_size - len >= addr &&
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(!vma || addr + len <= vma->vm_start))
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return addr;
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}
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if (len <= mm->cached_hole_size) {
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mm->cached_hole_size = 0;
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mm->free_area_cache = TASK_UNMAPPED_BASE;
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}
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start_addr = addr = mm->free_area_cache;
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task_size -= len;
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full_search:
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if (do_color_align)
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addr = COLOUR_ALIGN(addr, pgoff);
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else
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addr = PAGE_ALIGN(addr);
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for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
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/* At this point: (!vma || addr < vma->vm_end). */
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if (addr < PAGE_OFFSET && -PAGE_OFFSET - len < addr) {
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addr = PAGE_OFFSET;
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vma = find_vma(mm, PAGE_OFFSET);
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}
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if (task_size < addr) {
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if (start_addr != TASK_UNMAPPED_BASE) {
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start_addr = addr = TASK_UNMAPPED_BASE;
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mm->cached_hole_size = 0;
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goto full_search;
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}
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return -ENOMEM;
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}
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if (!vma || addr + len <= vma->vm_start) {
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/*
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* Remember the place where we stopped the search:
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*/
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mm->free_area_cache = addr + len;
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return addr;
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}
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if (addr + mm->cached_hole_size < vma->vm_start)
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mm->cached_hole_size = vma->vm_start - addr;
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addr = vma->vm_end;
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if (do_color_align)
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addr = COLOUR_ALIGN(addr, pgoff);
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}
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}
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/* Try to align mapping such that we align it as much as possible. */
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unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
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{
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unsigned long align_goal, addr = -ENOMEM;
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if (flags & MAP_FIXED) {
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/* Ok, don't mess with it. */
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return get_unmapped_area(NULL, addr, len, pgoff, flags);
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}
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flags &= ~MAP_SHARED;
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align_goal = PAGE_SIZE;
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if (len >= (4UL * 1024 * 1024))
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align_goal = (4UL * 1024 * 1024);
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else if (len >= (512UL * 1024))
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align_goal = (512UL * 1024);
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else if (len >= (64UL * 1024))
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align_goal = (64UL * 1024);
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do {
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addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
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if (!(addr & ~PAGE_MASK)) {
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addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
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break;
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}
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if (align_goal == (4UL * 1024 * 1024))
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align_goal = (512UL * 1024);
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else if (align_goal == (512UL * 1024))
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align_goal = (64UL * 1024);
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else
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align_goal = PAGE_SIZE;
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} while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
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/* Mapping is smaller than 64K or larger areas could not
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* be obtained.
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*/
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if (addr & ~PAGE_MASK)
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addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags);
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return addr;
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}
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asmlinkage unsigned long sparc_brk(unsigned long brk)
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{
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/* People could try to be nasty and use ta 0x6d in 32bit programs */
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if (test_thread_flag(TIF_32BIT) &&
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brk >= 0xf0000000UL)
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return current->mm->brk;
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if ((current->mm->brk & PAGE_OFFSET) != (brk & PAGE_OFFSET))
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return current->mm->brk;
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return sys_brk(brk);
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}
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/*
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* sys_pipe() is the normal C calling standard for creating
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* a pipe. It's not the way unix traditionally does this, though.
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*/
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asmlinkage long sparc_pipe(struct pt_regs *regs)
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{
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int fd[2];
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int error;
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error = do_pipe(fd);
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if (error)
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goto out;
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regs->u_regs[UREG_I1] = fd[1];
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error = fd[0];
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out:
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return error;
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}
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/*
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* sys_ipc() is the de-multiplexer for the SysV IPC calls..
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*
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* This is really horribly ugly.
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*/
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asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second,
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unsigned long third, void __user *ptr, long fifth)
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{
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int err;
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/* No need for backward compatibility. We can start fresh... */
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if (call <= SEMCTL) {
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switch (call) {
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case SEMOP:
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err = sys_semtimedop(first, ptr,
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(unsigned)second, NULL);
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goto out;
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case SEMTIMEDOP:
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err = sys_semtimedop(first, ptr, (unsigned)second,
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(const struct timespec __user *) fifth);
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goto out;
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case SEMGET:
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err = sys_semget(first, (int)second, (int)third);
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goto out;
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case SEMCTL: {
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union semun fourth;
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err = -EINVAL;
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if (!ptr)
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goto out;
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err = -EFAULT;
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if (get_user(fourth.__pad,
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(void __user * __user *) ptr))
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goto out;
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err = sys_semctl(first, (int)second | IPC_64,
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(int)third, fourth);
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goto out;
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}
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default:
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err = -ENOSYS;
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goto out;
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};
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}
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if (call <= MSGCTL) {
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switch (call) {
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case MSGSND:
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err = sys_msgsnd(first, ptr, (size_t)second,
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(int)third);
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goto out;
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case MSGRCV:
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err = sys_msgrcv(first, ptr, (size_t)second, fifth,
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(int)third);
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goto out;
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case MSGGET:
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err = sys_msgget((key_t)first, (int)second);
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goto out;
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case MSGCTL:
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err = sys_msgctl(first, (int)second | IPC_64, ptr);
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goto out;
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default:
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err = -ENOSYS;
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goto out;
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};
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}
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if (call <= SHMCTL) {
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switch (call) {
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case SHMAT: {
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ulong raddr;
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err = do_shmat(first, ptr, (int)second, &raddr);
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if (!err) {
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if (put_user(raddr,
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(ulong __user *) third))
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err = -EFAULT;
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}
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goto out;
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}
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case SHMDT:
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err = sys_shmdt(ptr);
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goto out;
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case SHMGET:
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err = sys_shmget(first, (size_t)second, (int)third);
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goto out;
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case SHMCTL:
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err = sys_shmctl(first, (int)second | IPC_64, ptr);
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goto out;
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default:
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err = -ENOSYS;
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goto out;
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};
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} else {
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err = -ENOSYS;
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}
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out:
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return err;
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}
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asmlinkage long sparc64_newuname(struct new_utsname __user *name)
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{
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int ret = sys_newuname(name);
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if (current->personality == PER_LINUX32 && !ret) {
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ret = (copy_to_user(name->machine, "sparc\0\0", 8)
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? -EFAULT : 0);
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}
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return ret;
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}
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asmlinkage long sparc64_personality(unsigned long personality)
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{
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int ret;
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if (current->personality == PER_LINUX32 &&
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personality == PER_LINUX)
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personality = PER_LINUX32;
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ret = sys_personality(personality);
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if (ret == PER_LINUX32)
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ret = PER_LINUX;
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return ret;
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}
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/* Linux version of mmap */
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asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags, unsigned long fd,
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unsigned long off)
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{
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struct file * file = NULL;
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unsigned long retval = -EBADF;
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if (!(flags & MAP_ANONYMOUS)) {
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file = fget(fd);
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if (!file)
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goto out;
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}
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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len = PAGE_ALIGN(len);
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retval = -EINVAL;
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if (test_thread_flag(TIF_32BIT)) {
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if (len > 0xf0000000UL ||
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((flags & MAP_FIXED) && addr > 0xf0000000UL - len))
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goto out_putf;
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} else {
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if (len > -PAGE_OFFSET ||
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((flags & MAP_FIXED) &&
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addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
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goto out_putf;
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}
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down_write(¤t->mm->mmap_sem);
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retval = do_mmap(file, addr, len, prot, flags, off);
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up_write(¤t->mm->mmap_sem);
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out_putf:
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if (file)
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fput(file);
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out:
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return retval;
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}
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asmlinkage long sys64_munmap(unsigned long addr, size_t len)
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{
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long ret;
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if (len > -PAGE_OFFSET ||
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(addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
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return -EINVAL;
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down_write(¤t->mm->mmap_sem);
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ret = do_munmap(current->mm, addr, len);
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up_write(¤t->mm->mmap_sem);
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return ret;
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}
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extern unsigned long do_mremap(unsigned long addr,
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unsigned long old_len, unsigned long new_len,
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unsigned long flags, unsigned long new_addr);
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asmlinkage unsigned long sys64_mremap(unsigned long addr,
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unsigned long old_len, unsigned long new_len,
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unsigned long flags, unsigned long new_addr)
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{
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struct vm_area_struct *vma;
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unsigned long ret = -EINVAL;
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if (test_thread_flag(TIF_32BIT))
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goto out;
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if (old_len > -PAGE_OFFSET || new_len > -PAGE_OFFSET)
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goto out;
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if (addr < PAGE_OFFSET && addr + old_len > -PAGE_OFFSET)
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goto out;
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down_write(¤t->mm->mmap_sem);
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if (flags & MREMAP_FIXED) {
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if (new_addr < PAGE_OFFSET &&
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new_addr + new_len > -PAGE_OFFSET)
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goto out_sem;
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} else if (addr < PAGE_OFFSET && addr + new_len > -PAGE_OFFSET) {
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unsigned long map_flags = 0;
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struct file *file = NULL;
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ret = -ENOMEM;
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if (!(flags & MREMAP_MAYMOVE))
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goto out_sem;
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vma = find_vma(current->mm, addr);
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if (vma) {
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if (vma->vm_flags & VM_SHARED)
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map_flags |= MAP_SHARED;
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file = vma->vm_file;
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}
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/* MREMAP_FIXED checked above. */
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new_addr = get_unmapped_area(file, addr, new_len,
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vma ? vma->vm_pgoff : 0,
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map_flags);
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ret = new_addr;
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if (new_addr & ~PAGE_MASK)
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goto out_sem;
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flags |= MREMAP_FIXED;
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}
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ret = do_mremap(addr, old_len, new_len, flags, new_addr);
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out_sem:
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up_write(¤t->mm->mmap_sem);
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out:
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return ret;
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}
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/* we come to here via sys_nis_syscall so it can setup the regs argument */
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asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
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{
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static int count;
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/* Don't make the system unusable, if someone goes stuck */
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if (count++ > 5)
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return -ENOSYS;
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printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
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#ifdef DEBUG_UNIMP_SYSCALL
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show_regs (regs);
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#endif
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return -ENOSYS;
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}
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/* #define DEBUG_SPARC_BREAKPOINT */
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asmlinkage void sparc_breakpoint(struct pt_regs *regs)
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{
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siginfo_t info;
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if (test_thread_flag(TIF_32BIT)) {
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regs->tpc &= 0xffffffff;
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regs->tnpc &= 0xffffffff;
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}
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#ifdef DEBUG_SPARC_BREAKPOINT
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printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
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#endif
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info.si_signo = SIGTRAP;
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info.si_errno = 0;
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info.si_code = TRAP_BRKPT;
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info.si_addr = (void __user *)regs->tpc;
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info.si_trapno = 0;
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force_sig_info(SIGTRAP, &info, current);
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#ifdef DEBUG_SPARC_BREAKPOINT
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printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
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#endif
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}
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extern void check_pending(int signum);
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asmlinkage long sys_getdomainname(char __user *name, int len)
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{
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int nlen;
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int err = -EFAULT;
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down_read(&uts_sem);
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nlen = strlen(system_utsname.domainname) + 1;
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if (nlen < len)
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len = nlen;
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if (len > __NEW_UTS_LEN)
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goto done;
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if (copy_to_user(name, system_utsname.domainname, len))
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goto done;
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err = 0;
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done:
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up_read(&uts_sem);
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return err;
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}
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asmlinkage long solaris_syscall(struct pt_regs *regs)
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{
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static int count;
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regs->tpc = regs->tnpc;
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regs->tnpc += 4;
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if (test_thread_flag(TIF_32BIT)) {
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regs->tpc &= 0xffffffff;
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regs->tnpc &= 0xffffffff;
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}
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if (++count <= 5) {
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printk ("For Solaris binary emulation you need solaris module loaded\n");
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show_regs (regs);
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}
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send_sig(SIGSEGV, current, 1);
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return -ENOSYS;
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}
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#ifndef CONFIG_SUNOS_EMUL
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asmlinkage long sunos_syscall(struct pt_regs *regs)
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{
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static int count;
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regs->tpc = regs->tnpc;
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regs->tnpc += 4;
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if (test_thread_flag(TIF_32BIT)) {
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regs->tpc &= 0xffffffff;
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regs->tnpc &= 0xffffffff;
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}
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if (++count <= 20)
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printk ("SunOS binary emulation not compiled in\n");
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force_sig(SIGSEGV, current);
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return -ENOSYS;
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}
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#endif
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asmlinkage long sys_utrap_install(utrap_entry_t type,
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utrap_handler_t new_p,
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|
utrap_handler_t new_d,
|
|
utrap_handler_t __user *old_p,
|
|
utrap_handler_t __user *old_d)
|
|
{
|
|
if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
|
|
return -EINVAL;
|
|
if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) {
|
|
if (old_p) {
|
|
if (!current_thread_info()->utraps) {
|
|
if (put_user(NULL, old_p))
|
|
return -EFAULT;
|
|
} else {
|
|
if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
if (old_d) {
|
|
if (put_user(NULL, old_d))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
if (!current_thread_info()->utraps) {
|
|
current_thread_info()->utraps =
|
|
kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
|
|
if (!current_thread_info()->utraps)
|
|
return -ENOMEM;
|
|
current_thread_info()->utraps[0] = 1;
|
|
memset(current_thread_info()->utraps+1, 0,
|
|
UT_TRAP_INSTRUCTION_31*sizeof(long));
|
|
} else {
|
|
if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p &&
|
|
current_thread_info()->utraps[0] > 1) {
|
|
long *p = current_thread_info()->utraps;
|
|
|
|
current_thread_info()->utraps =
|
|
kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long),
|
|
GFP_KERNEL);
|
|
if (!current_thread_info()->utraps) {
|
|
current_thread_info()->utraps = p;
|
|
return -ENOMEM;
|
|
}
|
|
p[0]--;
|
|
current_thread_info()->utraps[0] = 1;
|
|
memcpy(current_thread_info()->utraps+1, p+1,
|
|
UT_TRAP_INSTRUCTION_31*sizeof(long));
|
|
}
|
|
}
|
|
if (old_p) {
|
|
if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
|
|
return -EFAULT;
|
|
}
|
|
if (old_d) {
|
|
if (put_user(NULL, old_d))
|
|
return -EFAULT;
|
|
}
|
|
current_thread_info()->utraps[type] = (long)new_p;
|
|
|
|
return 0;
|
|
}
|
|
|
|
long sparc_memory_ordering(unsigned long model, struct pt_regs *regs)
|
|
{
|
|
if (model >= 3)
|
|
return -EINVAL;
|
|
regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14);
|
|
return 0;
|
|
}
|
|
|
|
asmlinkage long sys_rt_sigaction(int sig,
|
|
const struct sigaction __user *act,
|
|
struct sigaction __user *oact,
|
|
void __user *restorer,
|
|
size_t sigsetsize)
|
|
{
|
|
struct k_sigaction new_ka, old_ka;
|
|
int ret;
|
|
|
|
/* XXX: Don't preclude handling different sized sigset_t's. */
|
|
if (sigsetsize != sizeof(sigset_t))
|
|
return -EINVAL;
|
|
|
|
if (act) {
|
|
new_ka.ka_restorer = restorer;
|
|
if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
|
|
|
if (!ret && oact) {
|
|
if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Invoked by rtrap code to update performance counters in
|
|
* user space.
|
|
*/
|
|
asmlinkage void update_perfctrs(void)
|
|
{
|
|
unsigned long pic, tmp;
|
|
|
|
read_pic(pic);
|
|
tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
|
|
__put_user(tmp, current_thread_info()->user_cntd0);
|
|
tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
|
|
__put_user(tmp, current_thread_info()->user_cntd1);
|
|
reset_pic();
|
|
}
|
|
|
|
asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2)
|
|
{
|
|
int err = 0;
|
|
|
|
switch(opcode) {
|
|
case PERFCTR_ON:
|
|
current_thread_info()->pcr_reg = arg2;
|
|
current_thread_info()->user_cntd0 = (u64 __user *) arg0;
|
|
current_thread_info()->user_cntd1 = (u64 __user *) arg1;
|
|
current_thread_info()->kernel_cntd0 =
|
|
current_thread_info()->kernel_cntd1 = 0;
|
|
write_pcr(arg2);
|
|
reset_pic();
|
|
set_thread_flag(TIF_PERFCTR);
|
|
break;
|
|
|
|
case PERFCTR_OFF:
|
|
err = -EINVAL;
|
|
if (test_thread_flag(TIF_PERFCTR)) {
|
|
current_thread_info()->user_cntd0 =
|
|
current_thread_info()->user_cntd1 = NULL;
|
|
current_thread_info()->pcr_reg = 0;
|
|
write_pcr(0);
|
|
clear_thread_flag(TIF_PERFCTR);
|
|
err = 0;
|
|
}
|
|
break;
|
|
|
|
case PERFCTR_READ: {
|
|
unsigned long pic, tmp;
|
|
|
|
if (!test_thread_flag(TIF_PERFCTR)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
read_pic(pic);
|
|
tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
|
|
err |= __put_user(tmp, current_thread_info()->user_cntd0);
|
|
tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
|
|
err |= __put_user(tmp, current_thread_info()->user_cntd1);
|
|
reset_pic();
|
|
break;
|
|
}
|
|
|
|
case PERFCTR_CLRPIC:
|
|
if (!test_thread_flag(TIF_PERFCTR)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
current_thread_info()->kernel_cntd0 =
|
|
current_thread_info()->kernel_cntd1 = 0;
|
|
reset_pic();
|
|
break;
|
|
|
|
case PERFCTR_SETPCR: {
|
|
u64 __user *user_pcr = (u64 __user *)arg0;
|
|
|
|
if (!test_thread_flag(TIF_PERFCTR)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
err |= __get_user(current_thread_info()->pcr_reg, user_pcr);
|
|
write_pcr(current_thread_info()->pcr_reg);
|
|
current_thread_info()->kernel_cntd0 =
|
|
current_thread_info()->kernel_cntd1 = 0;
|
|
reset_pic();
|
|
break;
|
|
}
|
|
|
|
case PERFCTR_GETPCR: {
|
|
u64 __user *user_pcr = (u64 __user *)arg0;
|
|
|
|
if (!test_thread_flag(TIF_PERFCTR)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
err |= __put_user(current_thread_info()->pcr_reg, user_pcr);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
};
|
|
return err;
|
|
}
|