parisc: signal fixup - SIGBUS vs. SIGSEGV

Clean up code to send correct signal on invalid memory accesses:
Send SIGBUS instead of SIGSEGV for memory accesses outside of mmap'ed
areas

This fixes the mmap13 testcase from the Linux Test Project.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index df0d329..7584a5d 100644 (file)
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -280,12 +280,22 @@ bad_area:
                }
                show_regs(regs);
 #endif
-               /* FIXME: actually we need to get the signo and code correct */
-               si.si_signo = SIGSEGV;
+               switch (code) {
+               case 15:        /* Data TLB miss fault/Data page fault */
+               case 17:        /* NA data TLB miss / page fault */
+               case 18:        /* Unaligned access - PCXS only */
+                       si.si_signo = SIGBUS;
+                       si.si_code = BUS_ADRERR;
+                       break;
+               case 16:        /* Non-access instruction TLB miss fault */
+               case 26:        /* PCXL: Data memory access rights trap */
+               default:
+                       si.si_signo = SIGSEGV;
+                       si.si_code = SEGV_MAPERR;
+               }
                si.si_errno = 0;
-               si.si_code = SEGV_MAPERR;
                si.si_addr = (void __user *) address;
-               force_sig_info(SIGSEGV, &si, current);
+               force_sig_info(si.si_signo, &si, current);
                return;
        }