cmd/trace.c

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