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