cmd/trace.c

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <mapmem.h>
  10 #include <trace.h>
  11 #include <asm/io.h>
  12
  13 static int get_args(int argc, char * const argv[], char **buff,
  14                     size_t *buff_ptr, size_t *buff_size)
  15 {
  16         if (argc < 2)
  17                 return -1;
  18         if (argc < 4) {
  19                 *buff_size = env_get_ulong("profsize", 16, 0);
  20                 *buff = map_sysmem(env_get_ulong("profbase", 16, 0),
  21                                    *buff_size);
  22                 *buff_ptr = env_get_ulong("profoffset", 16, 0);
  23         } else {
  24                 *buff_size = simple_strtoul(argv[3], NULL, 16);
  25                 *buff = map_sysmem(simple_strtoul(argv[2], NULL, 16),
  26                                    *buff_size);
  27                 *buff_ptr = 0;
  28         };
  29         return 0;
  30 }
  31
  32 static int create_func_list(int argc, char * const argv[])
  33 {
  34         size_t buff_size, avail, buff_ptr, used;
  35         unsigned int needed;
  36         char *buff;
  37         int err;
  38
  39         if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
  40                 return -1;
  41
  42         avail = buff_size - buff_ptr;
  43         err = trace_list_functions(buff + buff_ptr, avail, &needed);
  44         if (err)
  45                 printf("Error: truncated (%#x bytes needed)\n", needed);
  46         used = min(avail, (size_t)needed);
  47         printf("Function trace dumped to %08lx, size %#zx\n",
  48                (ulong)map_to_sysmem(buff + buff_ptr), used);
  49         env_set_hex("profbase", map_to_sysmem(buff));
  50         env_set_hex("profsize", buff_size);
  51         env_set_hex("profoffset", buff_ptr + used);
  52
  53         return 0;
  54 }
  55
  56 static int create_call_list(int argc, char * const argv[])
  57 {
  58         size_t buff_size, avail, buff_ptr, used;
  59         unsigned int needed;
  60         char *buff;
  61         int err;
  62
  63         if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
  64                 return -1;
  65
  66         avail = buff_size - buff_ptr;
  67         err = trace_list_calls(buff + buff_ptr, avail, &needed);
  68         if (err)
  69                 printf("Error: truncated (%#x bytes needed)\n", needed);
  70         used = min(avail, (size_t)needed);
  71         printf("Call list dumped to %08lx, size %#zx\n",
  72                (ulong)map_to_sysmem(buff + buff_ptr), used);
  73
  74         env_set_hex("profbase", map_to_sysmem(buff));
  75         env_set_hex("profsize", buff_size);
  76         env_set_hex("profoffset", buff_ptr + used);
  77
  78         return 0;
  79 }
  80
  81 int do_trace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  82 {
  83         const char *cmd = argc < 2 ? NULL : argv[1];
  84
  85         if (!cmd)
  86                 return cmd_usage(cmdtp);
  87         switch (*cmd) {
  88         case 'p':
  89                 trace_set_enabled(0);
  90                 break;
  91         case 'c':
  92                 if (create_call_list(argc, argv))
  93                         return cmd_usage(cmdtp);
  94                 break;
  95         case 'r':
  96                 trace_set_enabled(1);
  97                 break;
  98         case 'f':
  99                 if (create_func_list(argc, argv))
 100                         return cmd_usage(cmdtp);
 101                 break;
 102         case 's':
 103                 trace_print_stats();
 104                 break;
 105         default:
 106                 return CMD_RET_USAGE;
 107         }
 108
 109         return 0;
 110 }
 111
 112 U_BOOT_CMD(
 113         trace,  4,      1,      do_trace,
 114         "trace utility commands",
 115         "stats                        - display tracing statistics\n"
 116         "trace pause                        - pause tracing\n"
 117         "trace resume                       - resume tracing\n"
 118         "trace funclist [<addr> <size>]     - dump function list into buffer\n"
 119         "trace calls  [<addr> <size>]       "
 120                 "- dump function call trace into buffer"
 121 );