trace.c
2.88 KB
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <mapmem.h>
#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) {
*buff_size = env_get_ulong("profsize", 16, 0);
*buff = map_sysmem(env_get_ulong("profbase", 16, 0),
*buff_size);
*buff_ptr = env_get_ulong("profoffset", 16, 0);
} 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)\n", needed);
used = min(avail, (size_t)needed);
printf("Function trace dumped to %08lx, size %#zx\n",
(ulong)map_to_sysmem(buff + buff_ptr), used);
env_set_hex("profbase", map_to_sysmem(buff));
env_set_hex("profsize", buff_size);
env_set_hex("profoffset", buff_ptr + used);
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)\n", needed);
used = min(avail, (size_t)needed);
printf("Call list dumped to %08lx, size %#zx\n",
(ulong)map_to_sysmem(buff + buff_ptr), used);
env_set_hex("profbase", map_to_sysmem(buff));
env_set_hex("profsize", buff_size);
env_set_hex("profoffset", buff_ptr + used);
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\n"
"trace pause - pause tracing\n"
"trace resume - resume tracing\n"
"trace funclist [<addr> <size>] - dump function list into buffer\n"
"trace calls [<addr> <size>] "
"- dump function call trace into buffer"
);