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 <env.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, needed, used;
  35         char *buff;
  36         int err;
  37
  38         if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
  39                 return -1;
  40
  41         avail = buff_size - buff_ptr;
  42         err = trace_list_functions(buff + buff_ptr, avail, &needed);
  43         if (err)
  44                 printf("Error: truncated (%#zx bytes needed)\n", needed);
  45         used = min(avail, (size_t)needed);
  46         printf("Function trace dumped to %08lx, size %#zx\n",
  47                (ulong)map_to_sysmem(buff + buff_ptr), used);
  48         env_set_hex("profbase", map_to_sysmem(buff));
  49         env_set_hex("profsize", buff_size);
  50         env_set_hex("profoffset", buff_ptr + used);
  51
  52         return 0;
  53 }
  54
  55 static int create_call_list(int argc, char *const argv[])
  56 {
  57         size_t buff_size, avail, buff_ptr, needed, used;
  58         char *buff;
  59         int err;
  60
  61         if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
  62                 return -1;
  63
  64         avail = buff_size - buff_ptr;
  65         err = trace_list_calls(buff + buff_ptr, avail, &needed);
  66         if (err)
  67                 printf("Error: truncated (%#zx bytes needed)\n", needed);
  68         used = min(avail, (size_t)needed);
  69         printf("Call list dumped to %08lx, size %#zx\n",
  70                (ulong)map_to_sysmem(buff + buff_ptr), used);
  71
  72         env_set_hex("profbase", map_to_sysmem(buff));
  73         env_set_hex("profsize", buff_size);
  74         env_set_hex("profoffset", buff_ptr + used);
  75
  76         return 0;
  77 }
  78
  79 int do_trace(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  80 {
  81         const char *cmd = argc < 2 ? NULL : argv[1];
  82
  83         if (!cmd)
  84                 return cmd_usage(cmdtp);
  85         switch (*cmd) {
  86         case 'p':
  87                 trace_set_enabled(0);
  88                 break;
  89         case 'c':
  90                 if (create_call_list(argc, argv))
  91                         return cmd_usage(cmdtp);
  92                 break;
  93         case 'r':
  94                 trace_set_enabled(1);
  95                 break;
  96         case 'f':
  97                 if (create_func_list(argc, argv))
  98                         return cmd_usage(cmdtp);
  99                 break;
 100         case 's':
 101                 trace_print_stats();
 102                 break;
 103         default:
 104                 return CMD_RET_USAGE;
 105         }
 106
 107         return 0;
 108 }
 109
 110 U_BOOT_CMD(
 111         trace,  4,      1,      do_trace,
 112         "trace utility commands",
 113         "stats                        - display tracing statistics\n"
 114         "trace pause                        - pause tracing\n"
 115         "trace resume                       - resume tracing\n"
 116         "trace funclist [<addr> <size>]     - dump function list into buffer\n"
 117         "trace calls  [<addr> <size>]       "
 118                 "- dump function call trace into buffer"
 119 );