apps/system/trace: support binary dump of noteram

This patch adds support for dumping binary contents from noteram via the
`trace dump -b <file>` command. Changes include:

- Add a `binary` parameter to `trace_dump()` and the public header
  `system/trace/trace.h` to indicate binary output mode.
- Update `trace_dump()` to set the noteram read mode to binary using
  `NOTERAM_SETREADMODE` when requested.
- Update `trace dump` CLI parsing in `system/trace/trace.c` to accept
  the `-b` flag and pass it through to `trace_dump()`.
- Update usage/help text to include the new `-b` option.

Signed-off-by: yukangzhi <yukangzhi@xiaomi.com>

system/trace/trace.c

@@ -147,10 +147,20 @@ static int trace_cmd_dump(FAR const char *name, int index, int argc,
 {
   FAR FILE *out = stdout;
   bool changed = false;
+  bool binary = false;
   bool cont = false;
   int ret;
 
-  /* Usage: trace dump [-c][<filename>] */
+  /* Usage: trace dump [-b][-c][<filename>] */
+
+  if (index < argc)
+    {
+      if (strcmp(argv[index], "-b") == 0)
+        {
+          binary = true;
+          index++;
+        }
+    }
 
   if (index < argc)
     {
@@ -192,11 +202,14 @@ static int trace_cmd_dump(FAR const char *name, int index, int argc,
 
   /* Dump the trace header */
 
-  fputs("# tracer: nop\n#\n", out);
+  if (!binary)
+    {
+      fputs("# tracer: nop\n#\n", out);
+    }
 
   /* Dump the trace data */
 
-  ret = trace_dump(out);
+  ret = trace_dump(out, binary);
 
   if (changed)
     {
@@ -803,9 +816,8 @@ static void show_usage(void)
                                 " Get the trace while running <command>\n"
 #endif
 #ifdef CONFIG_DRIVERS_NOTERAM
-          " dump    [-a][-c][<filename>]        :"
+          " dump    [-b][-c][<filename>]        :"
                                 " Output the trace result\n"
-          "                                       [-a] <Android SysTrace>\n"
 #endif
           " mode    [{+|-}{o|w|s|a|i|d}...]     :"
                                 " Set task trace options\n"

system/trace/trace.h

@@ -57,7 +57,7 @@ extern "C"
  *
  ****************************************************************************/
 
-int trace_dump(FAR FILE *out);
+int trace_dump(FAR FILE *out, bool binary);
 
 /****************************************************************************
  * Name: trace_dump_clear

system/trace/trace_dump.c

@@ -67,7 +67,7 @@ static void note_ioctl(int cmd, unsigned long arg)
  *
  ****************************************************************************/
 
-int trace_dump(FAR FILE *out)
+int trace_dump(FAR FILE *out, bool binary)
 {
   uint8_t tracedata[1024];
   int ret;
@@ -82,6 +82,18 @@ int trace_dump(FAR FILE *out)
       return ERROR;
     }
 
+  if (binary)
+    {
+      unsigned int mode = NOTERAM_MODE_READ_BINARY;
+      ret = ioctl(fd, NOTERAM_SETREADMODE, &mode);
+      if (ret < 0)
+        {
+          fprintf(stderr, "trace: cannot set read mode\n");
+          close(fd);
+          return ERROR;
+        }
+    }
+
   /* Read and output all notes */
 
   while (1)