#include <linux/ptrace.h>
#include <asm/uaccess.h>
-#include <asm/pgalloc.h>
#include <asm/io.h>
#include <asm/tlbflush.h>
#include <asm/irq.h>
do_exit(SIGSEGV);
}
- tss = init_tss + get_cpu();
+ tss = &per_cpu(init_tss, get_cpu());
current->thread.esp0 = current->thread.saved_esp0;
current->thread.sysenter_cs = __KERNEL_CS;
load_esp0(tss, ¤t->thread);
static void mark_screen_rdonly(struct task_struct * tsk)
{
pgd_t *pgd;
+ pud_t *pud;
pmd_t *pmd;
pte_t *pte, *mapped;
int i;
pgd_clear(pgd);
goto out;
}
- pmd = pmd_offset(pgd, 0xA0000);
+ pud = pud_offset(pgd, 0xA0000);
+ if (pud_none(*pud))
+ goto out;
+ if (pud_bad(*pud)) {
+ pud_ERROR(*pud);
+ pud_clear(pud);
+ goto out;
+ }
+ pmd = pmd_offset(pud, 0xA0000);
if (pmd_none(*pmd))
goto out;
if (pmd_bad(*pmd)) {
static int do_vm86_irq_handling(int subfunction, int irqnumber);
static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk);
-asmlinkage int sys_vm86old(struct vm86_struct __user * v86)
+asmlinkage int sys_vm86old(struct pt_regs regs)
{
+ struct vm86_struct __user *v86 = (struct vm86_struct __user *)regs.ebx;
struct kernel_vm86_struct info; /* declare this _on top_,
* this avoids wasting of stack space.
* This remains on the stack until we
if (tmp)
goto out;
memset(&info.vm86plus, 0, (int)&info.regs32 - (int)&info.vm86plus);
- info.regs32 = (struct pt_regs *) &v86;
+ info.regs32 = ®s;
tsk->thread.vm86_info = v86;
do_sys_vm86(&info, tsk);
ret = 0; /* we never return here */
}
-asmlinkage int sys_vm86(unsigned long subfunction, struct vm86plus_struct __user * v86)
+asmlinkage int sys_vm86(struct pt_regs regs)
{
struct kernel_vm86_struct info; /* declare this _on top_,
* this avoids wasting of stack space.
*/
struct task_struct *tsk;
int tmp, ret;
+ struct vm86plus_struct __user *v86;
tsk = current;
- switch (subfunction) {
+ switch (regs.ebx) {
case VM86_REQUEST_IRQ:
case VM86_FREE_IRQ:
case VM86_GET_IRQ_BITS:
case VM86_GET_AND_RESET_IRQ:
- ret = do_vm86_irq_handling(subfunction,(int)v86);
+ ret = do_vm86_irq_handling(regs.ebx, (int)regs.ecx);
goto out;
case VM86_PLUS_INSTALL_CHECK:
/* NOTE: on old vm86 stuff this will return the error
ret = -EPERM;
if (tsk->thread.saved_esp0)
goto out;
+ v86 = (struct vm86plus_struct __user *)regs.ecx;
tmp = copy_from_user(&info, v86, VM86_REGS_SIZE1);
tmp += copy_from_user(&info.regs.VM86_REGS_PART2, &v86->regs.VM86_REGS_PART2,
(long)&info.regs32 - (long)&info.regs.VM86_REGS_PART2);
ret = -EFAULT;
if (tmp)
goto out;
- info.regs32 = (struct pt_regs *) &subfunction;
+ info.regs32 = ®s;
info.vm86plus.is_vm86pus = 1;
tsk->thread.vm86_info = (struct vm86_struct __user *)v86;
do_sys_vm86(&info, tsk);
asm volatile("movl %%fs,%0":"=m" (tsk->thread.saved_fs));
asm volatile("movl %%gs,%0":"=m" (tsk->thread.saved_gs));
- tss = init_tss + get_cpu();
+ tss = &per_cpu(init_tss, get_cpu());
tsk->thread.esp0 = (unsigned long) &info->VM86_TSS_ESP0;
if (cpu_has_sep)
tsk->thread.sysenter_cs = 0;
if (VEFLAGS & VIF_MASK)
flags |= IF_MASK;
+ flags |= IOPL_MASK;
return flags | (VEFLAGS & current->thread.v86mask);
}
* in userspace is always better than an Oops anyway.) [KD]
*/
static void do_int(struct kernel_vm86_regs *regs, int i,
- unsigned char * ssp, unsigned short sp)
+ unsigned char __user * ssp, unsigned short sp)
{
- unsigned long *intr_ptr, segoffs;
+ unsigned long __user *intr_ptr;
+ unsigned long segoffs;
if (regs->cs == BIOSSEG)
goto cannot_handle;
goto cannot_handle;
if (i==0x21 && is_revectored(AH(regs),&KVM86->int21_revectored))
goto cannot_handle;
- intr_ptr = (unsigned long *) (i << 2);
+ intr_ptr = (unsigned long __user *) (i << 2);
if (get_user(segoffs, intr_ptr))
goto cannot_handle;
if ((segoffs >> 16) == BIOSSEG)
if (VMPI.is_vm86pus) {
if ( (trapno==3) || (trapno==1) )
return_to_32bit(regs, VM86_TRAP + (trapno << 8));
- do_int(regs, trapno, (unsigned char *) (regs->ss << 4), SP(regs));
+ do_int(regs, trapno, (unsigned char __user *) (regs->ss << 4), SP(regs));
return 0;
}
if (trapno !=1)
void handle_vm86_fault(struct kernel_vm86_regs * regs, long error_code)
{
- unsigned char *csp, *ssp, opcode;
+ unsigned char opcode;
+ unsigned char __user *csp;
+ unsigned char __user *ssp;
unsigned short ip, sp;
int data32, pref_done;
return_to_32bit(regs, VM86_PICRETURN); \
return; } while (0)
- csp = (unsigned char *) (regs->cs << 4);
- ssp = (unsigned char *) (regs->ss << 4);
+ csp = (unsigned char __user *) (regs->cs << 4);
+ ssp = (unsigned char __user *) (regs->ss << 4);
sp = SP(regs);
ip = IP(regs);
int sig;
} vm86_irqs[16];
-static spinlock_t irqbits_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(irqbits_lock);
static int irqbits;
#define ALLOWED_SIGS ( 1 /* 0 = don't send a signal */ \
irqbits |= irq_bit;
if (vm86_irqs[intno].sig)
send_sig(vm86_irqs[intno].sig, vm86_irqs[intno].tsk, 1);
- /* else user will poll for IRQs */
+ spin_unlock_irqrestore(&irqbits_lock, flags);
+ /*
+ * IRQ will be re-enabled when user asks for the irq (whether
+ * polling or as a result of the signal)
+ */
+ disable_irq(intno);
+ return IRQ_HANDLED;
+
out:
spin_unlock_irqrestore(&irqbits_lock, flags);
return IRQ_NONE;
{
unsigned long flags;
- free_irq(irqnumber,0);
- vm86_irqs[irqnumber].tsk = 0;
+ free_irq(irqnumber, NULL);
+ vm86_irqs[irqnumber].tsk = NULL;
spin_lock_irqsave(&irqbits_lock, flags);
irqbits &= ~(1 << irqnumber);
spin_unlock_irqrestore(&irqbits_lock, flags);
}
-void release_x86_irqs(struct task_struct *task)
+void release_vm86_irqs(struct task_struct *task)
{
int i;
for (i = FIRST_VM86_IRQ ; i <= LAST_VM86_IRQ; i++)
if (!((1 << sig) & ALLOWED_SIGS)) return -EPERM;
if (invalid_vm86_irq(irq)) return -EPERM;
if (vm86_irqs[irq].tsk) return -EPERM;
- ret = request_irq(irq, &irq_handler, 0, VM86_IRQNAME, 0);
+ ret = request_irq(irq, &irq_handler, 0, VM86_IRQNAME, NULL);
if (ret) return ret;
vm86_irqs[irq].sig = sig;
vm86_irqs[irq].tsk = current;
git://git.onelab.eu / linux-2.6.git / blobdiff