target-tilegx: Generate SEGV properly

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

linux-user/main.c

@@ -3460,6 +3460,9 @@ void cpu_loop(CPUTLGState *env)
         case TILEGX_EXCP_REG_UDN_ACCESS:
             gen_sigill_reg(env);
             break;
+        case TILEGX_EXCP_SEGV:
+            gen_sigsegv_maperr(env, env->excaddr);
+            break;
         default:
             fprintf(stderr, "trapnr is %d[0x%x].\n", trapnr, trapnr);
             g_assert_not_reached();

target-tilegx/cpu.c

@@ -119,7 +119,10 @@ static void tilegx_cpu_do_interrupt(CPUState *cs)
 static int tilegx_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
                                        int mmu_idx)
 {
-    cpu_dump_state(cs, stderr, fprintf, 0);
+    TileGXCPU *cpu = TILEGX_CPU(cs);
+
+    cs->exception_index = TILEGX_EXCP_SEGV;
+    cpu->env.excaddr = address;
     return 1;
 }
 

target-tilegx/cpu.h

@@ -60,6 +60,7 @@ enum {
 typedef enum {
     TILEGX_EXCP_NONE = 0,
     TILEGX_EXCP_SYSCALL = 1,
+    TILEGX_EXCP_SEGV = 2,
     TILEGX_EXCP_OPCODE_UNKNOWN = 0x101,
     TILEGX_EXCP_OPCODE_UNIMPLEMENTED = 0x102,
     TILEGX_EXCP_OPCODE_CMPEXCH = 0x103,
@@ -87,6 +88,7 @@ typedef struct CPUTLGState {
 
 #if defined(CONFIG_USER_ONLY)
     uint32_t excparam;                 /* exception parameter */
+    uint64_t excaddr;                  /* exception address */
 #endif
 
     CPU_COMMON