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/* $Id: sys_sparc.c,v 1.55.2.1 2001/12/21 04:58:23 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/ipc.h>
#include <linux/personality.h>
#include <asm/uaccess.h>
#include <asm/ipc.h>
#include <asm/utrap.h>
#include <asm/perfctr.h>
/* #define DEBUG_UNIMP_SYSCALL */
/* XXX Make this per-binary type, this way we can detect the type of
* XXX a binary. Every Sparc executable calls this very early on.
*/
asmlinkage unsigned long sys_getpagesize(void)
{
return PAGE_SIZE;
}
#define COLOUR_ALIGN(addr,pgoff) \
((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
(((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
{
struct vm_area_struct * vmm;
unsigned long task_size = TASK_SIZE;
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 & (SHMLBA - 1)))
return -EINVAL;
return addr;
}
if (current->thread.flags & SPARC_FLAG_32BIT)
task_size = 0xf0000000UL;
if (len > task_size || len > -PAGE_OFFSET)
return -ENOMEM;
if (!addr)
addr = TASK_UNMAPPED_BASE;
do_color_align = 0;
if (filp || (flags & MAP_SHARED))
do_color_align = 1;
if (do_color_align)
addr = COLOUR_ALIGN(addr, pgoff);
else
addr = PAGE_ALIGN(addr);
task_size -= len;
for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
/* At this point: (!vmm || addr < vmm->vm_end). */
if (addr < PAGE_OFFSET && -PAGE_OFFSET - len < addr) {
addr = PAGE_OFFSET;
vmm = find_vma(current->mm, PAGE_OFFSET);
}
if (task_size < addr)
return -ENOMEM;
if (!vmm || addr + len <= vmm->vm_start)
return addr;
addr = vmm->vm_end;
if (do_color_align)
addr = COLOUR_ALIGN(addr, pgoff);
}
}
/* 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;
}
extern asmlinkage unsigned long sys_brk(unsigned long brk);
asmlinkage unsigned long sparc_brk(unsigned long brk)
{
/* People could try to be nasty and use ta 0x6d in 32bit programs */
if ((current->thread.flags & SPARC_FLAG_32BIT) &&
brk >= 0xf0000000UL)
return current->mm->brk;
if ((current->mm->brk & PAGE_OFFSET) != (brk & PAGE_OFFSET))
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 int 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 int sys_ipc (unsigned call, int first, int second, unsigned long third, void *ptr, long fifth)
{
int err;
/* No need for backward compatibility. We can start fresh... */
if (call <= SEMCTL)
switch (call) {
case SEMOP:
err = sys_semop (first, (struct sembuf *)ptr, second);
goto out;
case SEMGET:
err = sys_semget (first, second, (int)third);
goto out;
case SEMCTL: {
union semun fourth;
err = -EINVAL;
if (!ptr)
goto out;
err = -EFAULT;
if(get_user(fourth.__pad, (void **)ptr))
goto out;
err = sys_semctl (first, second | IPC_64, (int)third, fourth);
goto out;
}
default:
err = -EINVAL;
goto out;
}
if (call <= MSGCTL)
switch (call) {
case MSGSND:
err = sys_msgsnd (first, (struct msgbuf *) ptr,
second, (int)third);
goto out;
case MSGRCV:
err = sys_msgrcv (first, (struct msgbuf *) ptr, second, fifth, (int)third);
goto out;
case MSGGET:
err = sys_msgget ((key_t) first, second);
goto out;
case MSGCTL:
err = sys_msgctl (first, second | IPC_64, (struct msqid_ds *) ptr);
goto out;
default:
err = -EINVAL;
goto out;
}
if (call <= SHMCTL)
switch (call) {
case SHMAT:
err = sys_shmat (first, (char *) ptr, second, (ulong *) third);
goto out;
case SHMDT:
err = sys_shmdt ((char *)ptr);
goto out;
case SHMGET:
err = sys_shmget (first, second, (int)third);
goto out;
case SHMCTL:
err = sys_shmctl (first, second | IPC_64, (struct shmid_ds *) ptr);
goto out;
default:
err = -EINVAL;
goto out;
}
else
err = -EINVAL;
out:
return err;
}
extern asmlinkage int sys_newuname(struct new_utsname * name);
asmlinkage int sparc64_newuname(struct new_utsname * name)
{
int ret = sys_newuname(name);
if (current->personality == PER_LINUX32 && !ret) {
ret = copy_to_user(name->machine, "sparc\0\0", 8);
}
return ret;
}
extern asmlinkage long sys_personality(unsigned long);
asmlinkage int 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 (current->thread.flags & SPARC_FLAG_32BIT) {
if (len > 0xf0000000UL ||
((flags & MAP_FIXED) && addr > 0xf0000000UL - len))
goto out_putf;
} else {
if (len > -PAGE_OFFSET ||
((flags & MAP_FIXED) &&
addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
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 (len > -PAGE_OFFSET ||
(addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
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 (current->thread.flags & SPARC_FLAG_32BIT)
goto out;
if (old_len > -PAGE_OFFSET || new_len > -PAGE_OFFSET)
goto out;
if (addr < PAGE_OFFSET && addr + old_len > -PAGE_OFFSET)
goto out;
down_write(¤t->mm->mmap_sem);
if (flags & MREMAP_FIXED) {
if (new_addr < PAGE_OFFSET &&
new_addr + new_len > -PAGE_OFFSET)
goto out_sem;
} else if (addr < PAGE_OFFSET && addr + new_len > -PAGE_OFFSET) {
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=0;
/* 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 ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
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 *)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 int sys_getdomainname(char *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;
}
/* only AP+ systems have sys_aplib */
asmlinkage int sys_aplib(void)
{
return -ENOSYS;
}
asmlinkage int solaris_syscall(struct pt_regs *regs)
{
static int count = 0;
regs->tpc = regs->tnpc;
regs->tnpc += 4;
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
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 int sunos_syscall(struct pt_regs *regs)
{
static int count = 0;
regs->tpc = regs->tnpc;
regs->tnpc += 4;
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
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 int sys_utrap_install(utrap_entry_t type, utrap_handler_t new_p,
utrap_handler_t new_d,
utrap_handler_t *old_p, utrap_handler_t *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.utraps) {
if (put_user(NULL, old_p))
return -EFAULT;
} else {
if (put_user((utrap_handler_t)(current->thread.utraps[type]), old_p))
return -EFAULT;
}
}
if (old_d) {
if (put_user(NULL, old_d))
return -EFAULT;
}
return 0;
}
if (!current->thread.utraps) {
current->thread.utraps =
kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
if (!current->thread.utraps) return -ENOMEM;
current->thread.utraps[0] = 1;
memset(current->thread.utraps+1, 0, UT_TRAP_INSTRUCTION_31*sizeof(long));
} else {
if ((utrap_handler_t)current->thread.utraps[type] != new_p &&
current->thread.utraps[0] > 1) {
long *p = current->thread.utraps;
current->thread.utraps =
kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long),
GFP_KERNEL);
if (!current->thread.utraps) {
current->thread.utraps = p;
return -ENOMEM;
}
p[0]--;
current->thread.utraps[0] = 1;
memcpy(current->thread.utraps+1, p+1,
UT_TRAP_INSTRUCTION_31*sizeof(long));
}
}
if (old_p) {
if (put_user((utrap_handler_t)(current->thread.utraps[type]), old_p))
return -EFAULT;
}
if (old_d) {
if (put_user(NULL, old_d))
return -EFAULT;
}
current->thread.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 int
sys_rt_sigaction(int sig, const struct sigaction *act, struct sigaction *oact,
void *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.kernel_cntd0 += (unsigned int)pic);
__put_user(tmp, current->thread.user_cntd0);
tmp = (current->thread.kernel_cntd1 += (pic >> 32));
__put_user(tmp, current->thread.user_cntd1);
reset_pic();
}
asmlinkage int
sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2)
{
int err = 0;
switch(opcode) {
case PERFCTR_ON:
current->thread.pcr_reg = arg2;
current->thread.user_cntd0 = (u64 *) arg0;
current->thread.user_cntd1 = (u64 *) arg1;
current->thread.kernel_cntd0 =
current->thread.kernel_cntd1 = 0;
write_pcr(arg2);
reset_pic();
current->thread.flags |= SPARC_FLAG_PERFCTR;
break;
case PERFCTR_OFF:
err = -EINVAL;
if ((current->thread.flags & SPARC_FLAG_PERFCTR) != 0) {
current->thread.user_cntd0 =
current->thread.user_cntd1 = NULL;
current->thread.pcr_reg = 0;
write_pcr(0);
current->thread.flags &= ~(SPARC_FLAG_PERFCTR);
err = 0;
}
break;
case PERFCTR_READ: {
unsigned long pic, tmp;
if (!(current->thread.flags & SPARC_FLAG_PERFCTR)) {
err = -EINVAL;
break;
}
read_pic(pic);
tmp = (current->thread.kernel_cntd0 += (unsigned int)pic);
err |= __put_user(tmp, current->thread.user_cntd0);
tmp = (current->thread.kernel_cntd1 += (pic >> 32));
err |= __put_user(tmp, current->thread.user_cntd1);
reset_pic();
break;
}
case PERFCTR_CLRPIC:
if (!(current->thread.flags & SPARC_FLAG_PERFCTR)) {
err = -EINVAL;
break;
}
current->thread.kernel_cntd0 =
current->thread.kernel_cntd1 = 0;
reset_pic();
break;
case PERFCTR_SETPCR: {
u64 *user_pcr = (u64 *)arg0;
if (!(current->thread.flags & SPARC_FLAG_PERFCTR)) {
err = -EINVAL;
break;
}
err |= __get_user(current->thread.pcr_reg, user_pcr);
write_pcr(current->thread.pcr_reg);
current->thread.kernel_cntd0 =
current->thread.kernel_cntd1 = 0;
reset_pic();
break;
}
case PERFCTR_GETPCR: {
u64 *user_pcr = (u64 *)arg0;
if (!(current->thread.flags & SPARC_FLAG_PERFCTR)) {
err = -EINVAL;
break;
}
err |= __put_user(current->thread.pcr_reg, user_pcr);
break;
}
default:
err = -EINVAL;
break;
};
return err;
}
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