linux-user: Add -help

[mirror_qemu.git] / linux-user / main.c

diff --git a/linux-user/main.c b/linux-user/main.c
index 782037da84592f1ab9e83da311019b25e9c289b7..58d8d8dff58798887ef51d346353c3ae9f330415 100644 (file)
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -63,7 +63,7 @@ unsigned long reserved_va = 0xf7000000;
 unsigned long reserved_va;
 #endif
 
-static void usage(void);
+static void usage(int exitcode);
 
 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
 const char *qemu_uname_release;
@@ -1650,7 +1650,7 @@ void cpu_loop(CPUPPCState *env)
             info.si_signo = TARGET_SIGBUS;
             info.si_errno = 0;
             info.si_code = TARGET_BUS_ADRALN;
-            info._sifields._sigfault._addr = env->nip - 4;
+            info._sifields._sigfault._addr = env->nip;
             queue_signal(env, info.si_signo, &info);
             break;
         case POWERPC_EXCP_PROGRAM:  /* Program exception                     */
@@ -3700,7 +3700,7 @@ CPUArchState *cpu_copy(CPUArchState *env)
 
 static void handle_arg_help(const char *arg)
 {
-    usage();
+    usage(0);
 }
 
 static void handle_arg_log(const char *arg)
@@ -3726,7 +3726,7 @@ static void handle_arg_set_env(const char *arg)
     r = p = strdup(arg);
     while ((token = strsep(&p, ",")) != NULL) {
         if (envlist_setenv(envlist, token) != 0) {
-            usage();
+            usage(1);
         }
     }
     free(r);
@@ -3738,7 +3738,7 @@ static void handle_arg_unset_env(const char *arg)
     r = p = strdup(arg);
     while ((token = strsep(&p, ",")) != NULL) {
         if (envlist_unsetenv(envlist, token) != 0) {
-            usage();
+            usage(1);
         }
     }
     free(r);
@@ -3754,7 +3754,7 @@ static void handle_arg_stack_size(const char *arg)
     char *p;
     guest_stack_size = strtoul(arg, &p, 0);
     if (guest_stack_size == 0) {
-        usage();
+        usage(1);
     }
 
     if (*p == 'M') {
@@ -3883,6 +3883,8 @@ struct qemu_argument {
 static const struct qemu_argument arg_table[] = {
     {"h",          "",                 false, handle_arg_help,
      "",           "print this help"},
+    {"help",       "",                 false, handle_arg_help,
+     "",           ""},
     {"g",          "QEMU_GDB",         true,  handle_arg_gdb,
      "port",       "wait gdb connection to 'port'"},
     {"L",          "QEMU_LD_PREFIX",   true,  handle_arg_ld_prefix,
@@ -3921,7 +3923,7 @@ static const struct qemu_argument arg_table[] = {
     {NULL, NULL, false, NULL, NULL, NULL}
 };
 
-static void usage(void)
+static void usage(int exitcode)
 {
     const struct qemu_argument *arginfo;
     int maxarglen;
@@ -3988,7 +3990,7 @@ static void usage(void)
            "Note that if you provide several changes to a single variable\n"
            "the last change will stay in effect.\n");
 
-    exit(1);
+    exit(exitcode);
 }
 
 static int parse_args(int argc, char **argv)
@@ -4027,7 +4029,7 @@ static int parse_args(int argc, char **argv)
             if (!strcmp(r, arginfo->argv)) {
                 if (arginfo->has_arg) {
                     if (optind >= argc) {
-                        usage();
+                        usage(1);
                     }
                     arginfo->handle_opt(argv[optind]);
                     optind++;
@@ -4040,12 +4042,12 @@ static int parse_args(int argc, char **argv)
 
         /* no option matched the current argv */
         if (arginfo->handle_opt == NULL) {
-            usage();
+            usage(1);
         }
     }
 
     if (optind >= argc) {
-        usage();
+        usage(1);
     }
 
     filename = argv[optind];