960 lines
23 KiB
C
960 lines
23 KiB
C
/* $Id: sys_sparc.c,v 1.57 2002/02/09 19:49:30 davem Exp $
|
|
* linux/arch/sparc64/kernel/sys_sparc.c
|
|
*
|
|
* This file contains various random system calls that
|
|
* have a non-standard calling sequence on the Linux/sparc
|
|
* platform.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/file.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/smp_lock.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/personality.h>
|
|
#include <linux/random.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <asm/ipc.h>
|
|
#include <asm/utrap.h>
|
|
#include <asm/perfctr.h>
|
|
#include <asm/a.out.h>
|
|
|
|
/* #define DEBUG_UNIMP_SYSCALL */
|
|
|
|
asmlinkage unsigned long sys_getpagesize(void)
|
|
{
|
|
return PAGE_SIZE;
|
|
}
|
|
|
|
#define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL))
|
|
#define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL))
|
|
|
|
/* Does addr --> addr+len fall within 4GB of the VA-space hole or
|
|
* overflow past the end of the 64-bit address space?
|
|
*/
|
|
static inline int invalid_64bit_range(unsigned long addr, unsigned long len)
|
|
{
|
|
unsigned long va_exclude_start, va_exclude_end;
|
|
|
|
va_exclude_start = VA_EXCLUDE_START;
|
|
va_exclude_end = VA_EXCLUDE_END;
|
|
|
|
if (unlikely(len >= va_exclude_start))
|
|
return 1;
|
|
|
|
if (unlikely((addr + len) < addr))
|
|
return 1;
|
|
|
|
if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) ||
|
|
((addr + len) >= va_exclude_start &&
|
|
(addr + len) < va_exclude_end)))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Does start,end straddle the VA-space hole? */
|
|
static inline int straddles_64bit_va_hole(unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long va_exclude_start, va_exclude_end;
|
|
|
|
va_exclude_start = VA_EXCLUDE_START;
|
|
va_exclude_end = VA_EXCLUDE_END;
|
|
|
|
if (likely(start < va_exclude_start && end < va_exclude_start))
|
|
return 0;
|
|
|
|
if (likely(start >= va_exclude_end && end >= va_exclude_end))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* These functions differ from the default implementations in
|
|
* mm/mmap.c in two ways:
|
|
*
|
|
* 1) For file backed MAP_SHARED mmap()'s we D-cache color align,
|
|
* for fixed such mappings we just validate what the user gave us.
|
|
* 2) For 64-bit tasks we avoid mapping anything within 4GB of
|
|
* the spitfire/niagara VA-hole.
|
|
*/
|
|
|
|
static inline unsigned long COLOUR_ALIGN(unsigned long addr,
|
|
unsigned long pgoff)
|
|
{
|
|
unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1);
|
|
unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1);
|
|
|
|
return base + off;
|
|
}
|
|
|
|
static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr,
|
|
unsigned long pgoff)
|
|
{
|
|
unsigned long base = addr & ~(SHMLBA-1);
|
|
unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1);
|
|
|
|
if (base + off <= addr)
|
|
return base + off;
|
|
return base - off;
|
|
}
|
|
|
|
unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
|
|
{
|
|
struct mm_struct *mm = current->mm;
|
|
struct vm_area_struct * vma;
|
|
unsigned long task_size = TASK_SIZE;
|
|
unsigned long start_addr;
|
|
int do_color_align;
|
|
|
|
if (flags & MAP_FIXED) {
|
|
/* We do not accept a shared mapping if it would violate
|
|
* cache aliasing constraints.
|
|
*/
|
|
if ((flags & MAP_SHARED) &&
|
|
((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
|
|
return -EINVAL;
|
|
return addr;
|
|
}
|
|
|
|
if (test_thread_flag(TIF_32BIT))
|
|
task_size = STACK_TOP32;
|
|
if (unlikely(len > task_size || len >= VA_EXCLUDE_START))
|
|
return -ENOMEM;
|
|
|
|
do_color_align = 0;
|
|
if (filp || (flags & MAP_SHARED))
|
|
do_color_align = 1;
|
|
|
|
if (addr) {
|
|
if (do_color_align)
|
|
addr = COLOUR_ALIGN(addr, pgoff);
|
|
else
|
|
addr = PAGE_ALIGN(addr);
|
|
|
|
vma = find_vma(mm, addr);
|
|
if (task_size - len >= addr &&
|
|
(!vma || addr + len <= vma->vm_start))
|
|
return addr;
|
|
}
|
|
|
|
if (len > mm->cached_hole_size) {
|
|
start_addr = addr = mm->free_area_cache;
|
|
} else {
|
|
start_addr = addr = TASK_UNMAPPED_BASE;
|
|
mm->cached_hole_size = 0;
|
|
}
|
|
|
|
task_size -= len;
|
|
|
|
full_search:
|
|
if (do_color_align)
|
|
addr = COLOUR_ALIGN(addr, pgoff);
|
|
else
|
|
addr = PAGE_ALIGN(addr);
|
|
|
|
for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
|
|
/* At this point: (!vma || addr < vma->vm_end). */
|
|
if (addr < VA_EXCLUDE_START &&
|
|
(addr + len) >= VA_EXCLUDE_START) {
|
|
addr = VA_EXCLUDE_END;
|
|
vma = find_vma(mm, VA_EXCLUDE_END);
|
|
}
|
|
if (unlikely(task_size < addr)) {
|
|
if (start_addr != TASK_UNMAPPED_BASE) {
|
|
start_addr = addr = TASK_UNMAPPED_BASE;
|
|
mm->cached_hole_size = 0;
|
|
goto full_search;
|
|
}
|
|
return -ENOMEM;
|
|
}
|
|
if (likely(!vma || addr + len <= vma->vm_start)) {
|
|
/*
|
|
* Remember the place where we stopped the search:
|
|
*/
|
|
mm->free_area_cache = addr + len;
|
|
return addr;
|
|
}
|
|
if (addr + mm->cached_hole_size < vma->vm_start)
|
|
mm->cached_hole_size = vma->vm_start - addr;
|
|
|
|
addr = vma->vm_end;
|
|
if (do_color_align)
|
|
addr = COLOUR_ALIGN(addr, pgoff);
|
|
}
|
|
}
|
|
|
|
unsigned long
|
|
arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
|
|
const unsigned long len, const unsigned long pgoff,
|
|
const unsigned long flags)
|
|
{
|
|
struct vm_area_struct *vma;
|
|
struct mm_struct *mm = current->mm;
|
|
unsigned long task_size = STACK_TOP32;
|
|
unsigned long addr = addr0;
|
|
int do_color_align;
|
|
|
|
/* This should only ever run for 32-bit processes. */
|
|
BUG_ON(!test_thread_flag(TIF_32BIT));
|
|
|
|
if (flags & MAP_FIXED) {
|
|
/* We do not accept a shared mapping if it would violate
|
|
* cache aliasing constraints.
|
|
*/
|
|
if ((flags & MAP_SHARED) &&
|
|
((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
|
|
return -EINVAL;
|
|
return addr;
|
|
}
|
|
|
|
if (unlikely(len > task_size))
|
|
return -ENOMEM;
|
|
|
|
do_color_align = 0;
|
|
if (filp || (flags & MAP_SHARED))
|
|
do_color_align = 1;
|
|
|
|
/* requesting a specific address */
|
|
if (addr) {
|
|
if (do_color_align)
|
|
addr = COLOUR_ALIGN(addr, pgoff);
|
|
else
|
|
addr = PAGE_ALIGN(addr);
|
|
|
|
vma = find_vma(mm, addr);
|
|
if (task_size - len >= addr &&
|
|
(!vma || addr + len <= vma->vm_start))
|
|
return addr;
|
|
}
|
|
|
|
/* check if free_area_cache is useful for us */
|
|
if (len <= mm->cached_hole_size) {
|
|
mm->cached_hole_size = 0;
|
|
mm->free_area_cache = mm->mmap_base;
|
|
}
|
|
|
|
/* either no address requested or can't fit in requested address hole */
|
|
addr = mm->free_area_cache;
|
|
if (do_color_align) {
|
|
unsigned long base = COLOUR_ALIGN_DOWN(addr-len, pgoff);
|
|
|
|
addr = base + len;
|
|
}
|
|
|
|
/* make sure it can fit in the remaining address space */
|
|
if (likely(addr > len)) {
|
|
vma = find_vma(mm, addr-len);
|
|
if (!vma || addr <= vma->vm_start) {
|
|
/* remember the address as a hint for next time */
|
|
return (mm->free_area_cache = addr-len);
|
|
}
|
|
}
|
|
|
|
if (unlikely(mm->mmap_base < len))
|
|
goto bottomup;
|
|
|
|
addr = mm->mmap_base-len;
|
|
if (do_color_align)
|
|
addr = COLOUR_ALIGN_DOWN(addr, pgoff);
|
|
|
|
do {
|
|
/*
|
|
* Lookup failure means no vma is above this address,
|
|
* else if new region fits below vma->vm_start,
|
|
* return with success:
|
|
*/
|
|
vma = find_vma(mm, addr);
|
|
if (likely(!vma || addr+len <= vma->vm_start)) {
|
|
/* remember the address as a hint for next time */
|
|
return (mm->free_area_cache = addr);
|
|
}
|
|
|
|
/* remember the largest hole we saw so far */
|
|
if (addr + mm->cached_hole_size < vma->vm_start)
|
|
mm->cached_hole_size = vma->vm_start - addr;
|
|
|
|
/* try just below the current vma->vm_start */
|
|
addr = vma->vm_start-len;
|
|
if (do_color_align)
|
|
addr = COLOUR_ALIGN_DOWN(addr, pgoff);
|
|
} while (likely(len < vma->vm_start));
|
|
|
|
bottomup:
|
|
/*
|
|
* A failed mmap() very likely causes application failure,
|
|
* so fall back to the bottom-up function here. This scenario
|
|
* can happen with large stack limits and large mmap()
|
|
* allocations.
|
|
*/
|
|
mm->cached_hole_size = ~0UL;
|
|
mm->free_area_cache = TASK_UNMAPPED_BASE;
|
|
addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
|
|
/*
|
|
* Restore the topdown base:
|
|
*/
|
|
mm->free_area_cache = mm->mmap_base;
|
|
mm->cached_hole_size = ~0UL;
|
|
|
|
return addr;
|
|
}
|
|
|
|
/* Try to align mapping such that we align it as much as possible. */
|
|
unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
|
|
{
|
|
unsigned long align_goal, addr = -ENOMEM;
|
|
|
|
if (flags & MAP_FIXED) {
|
|
/* Ok, don't mess with it. */
|
|
return get_unmapped_area(NULL, addr, len, pgoff, flags);
|
|
}
|
|
flags &= ~MAP_SHARED;
|
|
|
|
align_goal = PAGE_SIZE;
|
|
if (len >= (4UL * 1024 * 1024))
|
|
align_goal = (4UL * 1024 * 1024);
|
|
else if (len >= (512UL * 1024))
|
|
align_goal = (512UL * 1024);
|
|
else if (len >= (64UL * 1024))
|
|
align_goal = (64UL * 1024);
|
|
|
|
do {
|
|
addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
|
|
if (!(addr & ~PAGE_MASK)) {
|
|
addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
|
|
break;
|
|
}
|
|
|
|
if (align_goal == (4UL * 1024 * 1024))
|
|
align_goal = (512UL * 1024);
|
|
else if (align_goal == (512UL * 1024))
|
|
align_goal = (64UL * 1024);
|
|
else
|
|
align_goal = PAGE_SIZE;
|
|
} while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
|
|
|
|
/* Mapping is smaller than 64K or larger areas could not
|
|
* be obtained.
|
|
*/
|
|
if (addr & ~PAGE_MASK)
|
|
addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags);
|
|
|
|
return addr;
|
|
}
|
|
|
|
/* Essentially the same as PowerPC... */
|
|
void arch_pick_mmap_layout(struct mm_struct *mm)
|
|
{
|
|
unsigned long random_factor = 0UL;
|
|
|
|
if (current->flags & PF_RANDOMIZE) {
|
|
random_factor = get_random_int();
|
|
if (test_thread_flag(TIF_32BIT))
|
|
random_factor &= ((1 * 1024 * 1024) - 1);
|
|
else
|
|
random_factor = ((random_factor << PAGE_SHIFT) &
|
|
0xffffffffUL);
|
|
}
|
|
|
|
/*
|
|
* Fall back to the standard layout if the personality
|
|
* bit is set, or if the expected stack growth is unlimited:
|
|
*/
|
|
if (!test_thread_flag(TIF_32BIT) ||
|
|
(current->personality & ADDR_COMPAT_LAYOUT) ||
|
|
current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY ||
|
|
sysctl_legacy_va_layout) {
|
|
mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
|
|
mm->get_unmapped_area = arch_get_unmapped_area;
|
|
mm->unmap_area = arch_unmap_area;
|
|
} else {
|
|
/* We know it's 32-bit */
|
|
unsigned long task_size = STACK_TOP32;
|
|
unsigned long gap;
|
|
|
|
gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
|
|
if (gap < 128 * 1024 * 1024)
|
|
gap = 128 * 1024 * 1024;
|
|
if (gap > (task_size / 6 * 5))
|
|
gap = (task_size / 6 * 5);
|
|
|
|
mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor);
|
|
mm->get_unmapped_area = arch_get_unmapped_area_topdown;
|
|
mm->unmap_area = arch_unmap_area_topdown;
|
|
}
|
|
}
|
|
|
|
asmlinkage unsigned long sparc_brk(unsigned long brk)
|
|
{
|
|
/* People could try to be nasty and use ta 0x6d in 32bit programs */
|
|
if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32)
|
|
return current->mm->brk;
|
|
|
|
if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk)))
|
|
return current->mm->brk;
|
|
|
|
return sys_brk(brk);
|
|
}
|
|
|
|
/*
|
|
* sys_pipe() is the normal C calling standard for creating
|
|
* a pipe. It's not the way unix traditionally does this, though.
|
|
*/
|
|
asmlinkage long sparc_pipe(struct pt_regs *regs)
|
|
{
|
|
int fd[2];
|
|
int error;
|
|
|
|
error = do_pipe(fd);
|
|
if (error)
|
|
goto out;
|
|
regs->u_regs[UREG_I1] = fd[1];
|
|
error = fd[0];
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
|
|
*
|
|
* This is really horribly ugly.
|
|
*/
|
|
|
|
asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second,
|
|
unsigned long third, void __user *ptr, long fifth)
|
|
{
|
|
int err;
|
|
|
|
/* No need for backward compatibility. We can start fresh... */
|
|
if (call <= SEMCTL) {
|
|
switch (call) {
|
|
case SEMOP:
|
|
err = sys_semtimedop(first, ptr,
|
|
(unsigned)second, NULL);
|
|
goto out;
|
|
case SEMTIMEDOP:
|
|
err = sys_semtimedop(first, ptr, (unsigned)second,
|
|
(const struct timespec __user *) fifth);
|
|
goto out;
|
|
case SEMGET:
|
|
err = sys_semget(first, (int)second, (int)third);
|
|
goto out;
|
|
case SEMCTL: {
|
|
union semun fourth;
|
|
err = -EINVAL;
|
|
if (!ptr)
|
|
goto out;
|
|
err = -EFAULT;
|
|
if (get_user(fourth.__pad,
|
|
(void __user * __user *) ptr))
|
|
goto out;
|
|
err = sys_semctl(first, (int)second | IPC_64,
|
|
(int)third, fourth);
|
|
goto out;
|
|
}
|
|
default:
|
|
err = -ENOSYS;
|
|
goto out;
|
|
};
|
|
}
|
|
if (call <= MSGCTL) {
|
|
switch (call) {
|
|
case MSGSND:
|
|
err = sys_msgsnd(first, ptr, (size_t)second,
|
|
(int)third);
|
|
goto out;
|
|
case MSGRCV:
|
|
err = sys_msgrcv(first, ptr, (size_t)second, fifth,
|
|
(int)third);
|
|
goto out;
|
|
case MSGGET:
|
|
err = sys_msgget((key_t)first, (int)second);
|
|
goto out;
|
|
case MSGCTL:
|
|
err = sys_msgctl(first, (int)second | IPC_64, ptr);
|
|
goto out;
|
|
default:
|
|
err = -ENOSYS;
|
|
goto out;
|
|
};
|
|
}
|
|
if (call <= SHMCTL) {
|
|
switch (call) {
|
|
case SHMAT: {
|
|
ulong raddr;
|
|
err = do_shmat(first, ptr, (int)second, &raddr);
|
|
if (!err) {
|
|
if (put_user(raddr,
|
|
(ulong __user *) third))
|
|
err = -EFAULT;
|
|
}
|
|
goto out;
|
|
}
|
|
case SHMDT:
|
|
err = sys_shmdt(ptr);
|
|
goto out;
|
|
case SHMGET:
|
|
err = sys_shmget(first, (size_t)second, (int)third);
|
|
goto out;
|
|
case SHMCTL:
|
|
err = sys_shmctl(first, (int)second | IPC_64, ptr);
|
|
goto out;
|
|
default:
|
|
err = -ENOSYS;
|
|
goto out;
|
|
};
|
|
} else {
|
|
err = -ENOSYS;
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
asmlinkage long sparc64_newuname(struct new_utsname __user *name)
|
|
{
|
|
int ret = sys_newuname(name);
|
|
|
|
if (current->personality == PER_LINUX32 && !ret) {
|
|
ret = (copy_to_user(name->machine, "sparc\0\0", 8)
|
|
? -EFAULT : 0);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long sparc64_personality(unsigned long personality)
|
|
{
|
|
int ret;
|
|
|
|
if (current->personality == PER_LINUX32 &&
|
|
personality == PER_LINUX)
|
|
personality = PER_LINUX32;
|
|
ret = sys_personality(personality);
|
|
if (ret == PER_LINUX32)
|
|
ret = PER_LINUX;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Linux version of mmap */
|
|
asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags, unsigned long fd,
|
|
unsigned long off)
|
|
{
|
|
struct file * file = NULL;
|
|
unsigned long retval = -EBADF;
|
|
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
}
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
len = PAGE_ALIGN(len);
|
|
retval = -EINVAL;
|
|
|
|
if (test_thread_flag(TIF_32BIT)) {
|
|
if (len >= STACK_TOP32)
|
|
goto out_putf;
|
|
|
|
if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len)
|
|
goto out_putf;
|
|
} else {
|
|
if (len >= VA_EXCLUDE_START)
|
|
goto out_putf;
|
|
|
|
if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len))
|
|
goto out_putf;
|
|
}
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
retval = do_mmap(file, addr, len, prot, flags, off);
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
out_putf:
|
|
if (file)
|
|
fput(file);
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
asmlinkage long sys64_munmap(unsigned long addr, size_t len)
|
|
{
|
|
long ret;
|
|
|
|
if (invalid_64bit_range(addr, len))
|
|
return -EINVAL;
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
ret = do_munmap(current->mm, addr, len);
|
|
up_write(¤t->mm->mmap_sem);
|
|
return ret;
|
|
}
|
|
|
|
extern unsigned long do_mremap(unsigned long addr,
|
|
unsigned long old_len, unsigned long new_len,
|
|
unsigned long flags, unsigned long new_addr);
|
|
|
|
asmlinkage unsigned long sys64_mremap(unsigned long addr,
|
|
unsigned long old_len, unsigned long new_len,
|
|
unsigned long flags, unsigned long new_addr)
|
|
{
|
|
struct vm_area_struct *vma;
|
|
unsigned long ret = -EINVAL;
|
|
|
|
if (test_thread_flag(TIF_32BIT))
|
|
goto out;
|
|
if (unlikely(new_len >= VA_EXCLUDE_START))
|
|
goto out;
|
|
if (unlikely(invalid_64bit_range(addr, old_len)))
|
|
goto out;
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
if (flags & MREMAP_FIXED) {
|
|
if (invalid_64bit_range(new_addr, new_len))
|
|
goto out_sem;
|
|
} else if (invalid_64bit_range(addr, new_len)) {
|
|
unsigned long map_flags = 0;
|
|
struct file *file = NULL;
|
|
|
|
ret = -ENOMEM;
|
|
if (!(flags & MREMAP_MAYMOVE))
|
|
goto out_sem;
|
|
|
|
vma = find_vma(current->mm, addr);
|
|
if (vma) {
|
|
if (vma->vm_flags & VM_SHARED)
|
|
map_flags |= MAP_SHARED;
|
|
file = vma->vm_file;
|
|
}
|
|
|
|
/* MREMAP_FIXED checked above. */
|
|
new_addr = get_unmapped_area(file, addr, new_len,
|
|
vma ? vma->vm_pgoff : 0,
|
|
map_flags);
|
|
ret = new_addr;
|
|
if (new_addr & ~PAGE_MASK)
|
|
goto out_sem;
|
|
flags |= MREMAP_FIXED;
|
|
}
|
|
ret = do_mremap(addr, old_len, new_len, flags, new_addr);
|
|
out_sem:
|
|
up_write(¤t->mm->mmap_sem);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* we come to here via sys_nis_syscall so it can setup the regs argument */
|
|
asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
|
|
{
|
|
static int count;
|
|
|
|
/* Don't make the system unusable, if someone goes stuck */
|
|
if (count++ > 5)
|
|
return -ENOSYS;
|
|
|
|
printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
|
|
#ifdef DEBUG_UNIMP_SYSCALL
|
|
show_regs (regs);
|
|
#endif
|
|
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/* #define DEBUG_SPARC_BREAKPOINT */
|
|
|
|
asmlinkage void sparc_breakpoint(struct pt_regs *regs)
|
|
{
|
|
siginfo_t info;
|
|
|
|
if (test_thread_flag(TIF_32BIT)) {
|
|
regs->tpc &= 0xffffffff;
|
|
regs->tnpc &= 0xffffffff;
|
|
}
|
|
#ifdef DEBUG_SPARC_BREAKPOINT
|
|
printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
|
|
#endif
|
|
info.si_signo = SIGTRAP;
|
|
info.si_errno = 0;
|
|
info.si_code = TRAP_BRKPT;
|
|
info.si_addr = (void __user *)regs->tpc;
|
|
info.si_trapno = 0;
|
|
force_sig_info(SIGTRAP, &info, current);
|
|
#ifdef DEBUG_SPARC_BREAKPOINT
|
|
printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
|
|
#endif
|
|
}
|
|
|
|
extern void check_pending(int signum);
|
|
|
|
asmlinkage long sys_getdomainname(char __user *name, int len)
|
|
{
|
|
int nlen;
|
|
int err = -EFAULT;
|
|
|
|
down_read(&uts_sem);
|
|
|
|
nlen = strlen(system_utsname.domainname) + 1;
|
|
|
|
if (nlen < len)
|
|
len = nlen;
|
|
if (len > __NEW_UTS_LEN)
|
|
goto done;
|
|
if (copy_to_user(name, system_utsname.domainname, len))
|
|
goto done;
|
|
err = 0;
|
|
done:
|
|
up_read(&uts_sem);
|
|
return err;
|
|
}
|
|
|
|
asmlinkage long solaris_syscall(struct pt_regs *regs)
|
|
{
|
|
static int count;
|
|
|
|
regs->tpc = regs->tnpc;
|
|
regs->tnpc += 4;
|
|
if (test_thread_flag(TIF_32BIT)) {
|
|
regs->tpc &= 0xffffffff;
|
|
regs->tnpc &= 0xffffffff;
|
|
}
|
|
if (++count <= 5) {
|
|
printk ("For Solaris binary emulation you need solaris module loaded\n");
|
|
show_regs (regs);
|
|
}
|
|
send_sig(SIGSEGV, current, 1);
|
|
|
|
return -ENOSYS;
|
|
}
|
|
|
|
#ifndef CONFIG_SUNOS_EMUL
|
|
asmlinkage long sunos_syscall(struct pt_regs *regs)
|
|
{
|
|
static int count;
|
|
|
|
regs->tpc = regs->tnpc;
|
|
regs->tnpc += 4;
|
|
if (test_thread_flag(TIF_32BIT)) {
|
|
regs->tpc &= 0xffffffff;
|
|
regs->tnpc &= 0xffffffff;
|
|
}
|
|
if (++count <= 20)
|
|
printk ("SunOS binary emulation not compiled in\n");
|
|
force_sig(SIGSEGV, current);
|
|
|
|
return -ENOSYS;
|
|
}
|
|
#endif
|
|
|
|
asmlinkage long sys_utrap_install(utrap_entry_t type,
|
|
utrap_handler_t new_p,
|
|
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 =
|
|
kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
|
|
if (!current_thread_info()->utraps)
|
|
return -ENOMEM;
|
|
current_thread_info()->utraps[0] = 1;
|
|
} 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;
|
|
}
|