Merge remote-tracking branch 'riku/linux-user-for-upstream' into staging

* riku/linux-user-for-upstream:
  linux-user: fix emulation of /proc/self/maps
  linux-user: Clean up interim solution for exit syscall

linux-user/syscall.c

@@ -4866,13 +4866,53 @@ int get_osversion(void)
 
 static int open_self_maps(void *cpu_env, int fd)
 {
+#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
     TaskState *ts = ((CPUArchState *)cpu_env)->opaque;
+#endif
+    FILE *fp;
+    char *line = NULL;
+    size_t len = 0;
+    ssize_t read;
+
+    fp = fopen("/proc/self/maps", "r");
+    if (fp == NULL) {
+        return -EACCES;
+    }
+
+    while ((read = getline(&line, &len, fp)) != -1) {
+        int fields, dev_maj, dev_min, inode;
+        uint64_t min, max, offset;
+        char flag_r, flag_w, flag_x, flag_p;
+        char path[512] = "";
+        fields = sscanf(line, "%"PRIx64"-%"PRIx64" %c%c%c%c %"PRIx64" %x:%x %d"
+                        " %512s", &min, &max, &flag_r, &flag_w, &flag_x,
+                        &flag_p, &offset, &dev_maj, &dev_min, &inode, path);
 
+        if ((fields < 10) || (fields > 11)) {
+            continue;
+        }
+        if (!strncmp(path, "[stack]", 7)) {
+            continue;
+        }
+        if (h2g_valid(min) && h2g_valid(max)) {
+            dprintf(fd, TARGET_ABI_FMT_lx "-" TARGET_ABI_FMT_lx
+                    " %c%c%c%c %08" PRIx64 " %02x:%02x %d%s%s\n",
+                    h2g(min), h2g(max), flag_r, flag_w,
+                    flag_x, flag_p, offset, dev_maj, dev_min, inode,
+                    path[0] ? "          " : "", path);
+        }
+    }
+
+    free(line);
+    fclose(fp);
+
+#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
     dprintf(fd, "%08llx-%08llx rw-p %08llx 00:00 0          [stack]\n",
                 (unsigned long long)ts->info->stack_limit,
                 (unsigned long long)(ts->stack_base + (TARGET_PAGE_SIZE - 1))
                                      & TARGET_PAGE_MASK,
-                (unsigned long long)ts->stack_base);
+                (unsigned long long)0);
+#endif
 
     return 0;
 }
@@ -5045,11 +5085,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                         NULL, NULL, 0);
           }
           thread_env = NULL;
-#ifdef ENV_GET_CPU
           object_delete(OBJECT(ENV_GET_CPU(cpu_env)));
-#else
-          g_free(cpu_env);
-#endif
           g_free(ts);
           pthread_exit(NULL);
       }