trace.c 2.9 KB

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