vm: add VM_FAULT_SIGSEGV handling support

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sh / mm / fault.c

diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c
index 1f49c28affa90495047c6b82577b2d5221bc089b..a58fec9b55e016df85cdfb7c214cc385e300479c 100644 (file)
--- a/arch/sh/mm/fault.c
+++ b/arch/sh/mm/fault.c
@@ -353,6 +353,8 @@ mm_fault_error(struct pt_regs *regs, unsigned long error_code,
        } else {
                if (fault & VM_FAULT_SIGBUS)
                        do_sigbus(regs, error_code, address);
+               else if (fault & VM_FAULT_SIGSEGV)
+                       bad_area(regs, error_code, address);
                else
                        BUG();
        }
@@ -400,9 +402,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
        struct mm_struct *mm;
        struct vm_area_struct * vma;
        int fault;
-       int write = error_code & FAULT_CODE_WRITE;
-       unsigned int flags = (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
-                             (write ? FAULT_FLAG_WRITE : 0));
+       unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
 
        tsk = current;
        mm = tsk->mm;
@@ -476,6 +476,11 @@ good_area:
 
        set_thread_fault_code(error_code);
 
+       if (user_mode(regs))
+               flags |= FAULT_FLAG_USER;
+       if (error_code & FAULT_CODE_WRITE)
+               flags |= FAULT_FLAG_WRITE;
+
        /*
         * If for any reason at all we couldn't handle the fault,
         * make sure we exit gracefully rather than endlessly redo