Eric Lee / smarc-uboot

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cmd/trace.c 2.88 KB
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cabcbb56c   Simon Glass   Add a trace command 
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  /*
   * Copyright (c) 2011 The Chromium OS Authors.
   *
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   * SPDX-License-Identifier:	GPL-2.0+
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   */
  
  #include <common.h>
  #include <command.h>
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  #include <mapmem.h>
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  #include <trace.h>
  #include <asm/io.h>
  
  static int get_args(int argc, char * const argv[], char **buff,
  		    size_t *buff_ptr, size_t *buff_size)
  {
  	if (argc < 2)
  		return -1;
  	if (argc < 4) {
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  		*buff_size = env_get_ulong("profsize", 16, 0);
  		*buff = map_sysmem(env_get_ulong("profbase", 16, 0),
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  				   *buff_size);
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  		*buff_ptr = env_get_ulong("profoffset", 16, 0);
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  	} else {
  		*buff_size = simple_strtoul(argv[3], NULL, 16);
  		*buff = map_sysmem(simple_strtoul(argv[2], NULL, 16),
  				   *buff_size);
  		*buff_ptr = 0;
  	};
  	return 0;
  }
  
  static int create_func_list(int argc, char * const argv[])
  {
  	size_t buff_size, avail, buff_ptr, used;
  	unsigned int needed;
  	char *buff;
  	int err;
  
  	if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
  		return -1;
  
  	avail = buff_size - buff_ptr;
  	err = trace_list_functions(buff + buff_ptr, avail, &needed);
  	if (err)
  		printf("Error: truncated (%#x bytes needed)
  ", needed);
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  	used = min(avail, (size_t)needed);
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  	printf("Function trace dumped to %08lx, size %#zx
  ",
  	       (ulong)map_to_sysmem(buff + buff_ptr), used);
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  	env_set_hex("profbase", map_to_sysmem(buff));
  	env_set_hex("profsize", buff_size);
  	env_set_hex("profoffset", buff_ptr + used);
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  	return 0;
  }
  
  static int create_call_list(int argc, char * const argv[])
  {
  	size_t buff_size, avail, buff_ptr, used;
  	unsigned int needed;
  	char *buff;
  	int err;
  
  	if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
  		return -1;
  
  	avail = buff_size - buff_ptr;
  	err = trace_list_calls(buff + buff_ptr, avail, &needed);
  	if (err)
  		printf("Error: truncated (%#x bytes needed)
  ", needed);
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  	used = min(avail, (size_t)needed);
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  	printf("Call list dumped to %08lx, size %#zx
  ",
  	       (ulong)map_to_sysmem(buff + buff_ptr), used);
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  	env_set_hex("profbase", map_to_sysmem(buff));
  	env_set_hex("profsize", buff_size);
  	env_set_hex("profoffset", buff_ptr + used);
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  	return 0;
  }
  
  int do_trace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  {
  	const char *cmd = argc < 2 ? NULL : argv[1];
  
  	if (!cmd)
  		return cmd_usage(cmdtp);
  	switch (*cmd) {
  	case 'p':
  		trace_set_enabled(0);
  		break;
  	case 'c':
  		if (create_call_list(argc, argv))
  			return cmd_usage(cmdtp);
  		break;
  	case 'r':
  		trace_set_enabled(1);
  		break;
  	case 'f':
  		if (create_func_list(argc, argv))
  			return cmd_usage(cmdtp);
  		break;
  	case 's':
  		trace_print_stats();
  		break;
  	default:
  		return CMD_RET_USAGE;
  	}
  
  	return 0;
  }
  
  U_BOOT_CMD(
  	trace,	4,	1,	do_trace,
  	"trace utility commands",
  	"stats                        - display tracing statistics
  "
  	"trace pause                        - pause tracing
  "
  	"trace resume                       - resume tracing
  "
  	"trace funclist [<addr> <size>]     - dump function list into buffer
  "
  	"trace calls  [<addr> <size>]       "
  		"- dump function call trace into buffer"
  );