#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
+#include <asm/highmem.h> /* For VMALLOC_END */
/*
* This routine handles page faults. It determines the address,
* only copy the information from the master page table,
* nothing more.
*/
- if (unlikely(address >= VMALLOC_START))
+ if (unlikely(address >= VMALLOC_START && address <= VMALLOC_END))
goto vmalloc_fault;
/*
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* info.si_code has been set above */
- info.si_addr = (void *) address;
+ info.si_addr = (void __user *) address;
force_sig_info(SIGSEGV, &info, tsk);
return;
}
* Oops. The kernel tried to access some bad page. We'll have to
* terminate things with extreme prejudice.
*/
-
bust_spinlocks(1);
printk(KERN_ALERT "CPU %d Unable to handle kernel paging request at "
/* Kernel mode? Handle exceptions or die */
if (!user_mode(regs))
goto no_context;
-
+ else
/*
* Send a sigbus, regardless of whether we were in kernel
* or user mode.
*/
+#if 0
+ printk("do_page_fault() #3: sending SIGBUS to %s for "
+ "invalid %s\n%0*lx (epc == %0*lx, ra == %0*lx)\n",
+ tsk->comm,
+ write ? "write access to" : "read access from",
+ field, address,
+ field, (unsigned long) regs->cp0_epc,
+ field, (unsigned long) regs->regs[31]);
+#endif
tsk->thread.cp0_badvaddr = address;
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_ADRERR;
- info.si_addr = (void *) address;
+ info.si_addr = (void __user *) address;
force_sig_info(SIGBUS, &info, tsk);
return;
-
vmalloc_fault:
{
/*
*/
int offset = __pgd_offset(address);
pgd_t *pgd, *pgd_k;
+ pud_t *pud, *pud_k;
pmd_t *pmd, *pmd_k;
pte_t *pte_k;
goto no_context;
set_pgd(pgd, *pgd_k);
- pmd = pmd_offset(pgd, address);
- pmd_k = pmd_offset(pgd_k, address);
+ pud = pud_offset(pgd, address);
+ pud_k = pud_offset(pgd_k, address);
+ if (!pud_present(*pud_k))
+ goto no_context;
+
+ pmd = pmd_offset(pud, address);
+ pmd_k = pmd_offset(pud_k, address);
if (!pmd_present(*pmd_k))
goto no_context;
set_pmd(pmd, *pmd_k);