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, used;
  34         unsigned int needed;
  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 (%#x 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, used;
  58         unsigned int needed;
  59         char *buff;
  60         int err;
  61
  62         if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
  63                 return -1;
  64
  65         avail = buff_size - buff_ptr;
  66         err = trace_list_calls(buff + buff_ptr, avail, &needed);
  67         if (err)
  68                 printf("Error: truncated (%#x bytes needed)\n", needed);
  69         used = min(avail, (size_t)needed);
  70         printf("Call list dumped to %08lx, size %#zx\n",
  71                (ulong)map_to_sysmem(buff + buff_ptr), used);
  72
  73         env_set_hex("profbase", map_to_sysmem(buff));
  74         env_set_hex("profsize", buff_size);
  75         env_set_hex("profoffset", buff_ptr + used);
  76
  77         return 0;
  78 }
  79
  80 int do_trace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  81 {
  82         const char *cmd = argc < 2 ? NULL : argv[1];
  83
  84         if (!cmd)
  85                 return cmd_usage(cmdtp);
  86         switch (*cmd) {
  87         case 'p':
  88                 trace_set_enabled(0);
  89                 break;
  90         case 'c':
  91                 if (create_call_list(argc, argv))
  92                         return cmd_usage(cmdtp);
  93                 break;
  94         case 'r':
  95                 trace_set_enabled(1);
  96                 break;
  97         case 'f':
  98                 if (create_func_list(argc, argv))
  99                         return cmd_usage(cmdtp);
 100                 break;
 101         case 's':
 102                 trace_print_stats();
 103                 break;
 104         default:
 105                 return CMD_RET_USAGE;
 106         }
 107
 108         return 0;
 109 }
 110
 111 U_BOOT_CMD(
 112         trace,  4,      1,      do_trace,
 113         "trace utility commands",
 114         "stats                        - display tracing statistics\n"
 115         "trace pause                        - pause tracing\n"
 116         "trace resume                       - resume tracing\n"
 117         "trace funclist [<addr> <size>]     - dump function list into buffer\n"
 118         "trace calls  [<addr> <size>]       "
 119                 "- dump function call trace into buffer"
 120 );