sh: Set up correct siginfo structures for page faults.

Remove the previous saving of fault codes into the thread_struct
as they are never used, and appeared to be inherited from x86.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 17 insertions, 9 deletions

diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c
index 68663b8f99ae..43bed2cb00e3 100644
--- a/arch/sh/mm/fault.c
+++ b/arch/sh/mm/fault.c
@@ -26,13 +26,16 @@ extern void die(const char *,struct pt_regs *,long);
  * and the problem, and then passes it off to one of the appropriate
  * routines.
  */
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
-                              unsigned long address)
+asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
+                                        unsigned long writeaccess,
+                                        unsigned long address)
 {
         struct task_struct *tsk;
         struct mm_struct *mm;
         struct vm_area_struct * vma;
         unsigned long page;
+        int si_code;
+        siginfo_t info;
 
 #ifdef CONFIG_SH_KGDB
         if (kgdb_nofault && kgdb_bus_err_hook)
@@ -41,6 +44,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
 
         tsk = current;
         mm = tsk->mm;
+        si_code = SEGV_MAPERR;
 
         /*
          * If we're in an interrupt or have no user
@@ -65,6 +69,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
  * we can handle it..
  */
 good_area:
+        si_code = SEGV_ACCERR;
         if (writeaccess) {
                 if (!(vma->vm_flags & VM_WRITE))
                         goto bad_area;
@@ -105,9 +110,11 @@ bad_area:
         up_read(&mm->mmap_sem);
 
         if (user_mode(regs)) {
-                tsk->thread.address = address;
-                tsk->thread.error_code = writeaccess;
-                force_sig(SIGSEGV, tsk);
+                info.si_signo = SIGSEGV;
+                info.si_errno = 0;
+                info.si_code = si_code;
+                info.si_addr = (void *) address;
+                force_sig_info(SIGSEGV, &info, tsk);
                 return;
         }
 
@@ -166,10 +173,11 @@ do_sigbus:
          * Send a sigbus, regardless of whether we were in kernel
          * or user mode.
          */
-        tsk->thread.address = address;
-        tsk->thread.error_code = writeaccess;
-        tsk->thread.trap_no = 14;
-        force_sig(SIGBUS, tsk);
+        info.si_signo = SIGBUS;
+        info.si_errno = 0;
+        info.si_code = BUS_ADRERR;
+        info.si_addr = (void *)address;
+        force_sig_info(SIGBUS, &info, tsk);
 
         /* Kernel mode? Handle exceptions or die */
         if (!user_mode(regs))