Ventoy/VtoyTool/vtoyksym.c

114 lines
2.7 KiB
C

/******************************************************************************
* vtoyksym.c ---- ventoy ksym
*
* Copyright (c) 2021, longpanda <admin@ventoy.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
static int verbose = 0;
#define debug(fmt, ...) if(verbose) printf(fmt, ##__VA_ARGS__)
int vtoyksym_main(int argc, char **argv)
{
int i;
unsigned long long addr1 = 0;
unsigned long long addr2 = 0;
char sym[256];
char line[1024];
const char *name = NULL;
FILE *fp;
for (i = 0; i < argc; i++)
{
if (argv[i][0] == '-' && argv[i][1] == 'p')
{
printf("%d", getpagesize());
return 0;
}
}
for (i = 0; i < argc; i++)
{
if (argv[i][0] == '-' && argv[i][1] == 'v')
{
verbose = 1;
break;
}
}
name = argv[2] ? argv[2] : "/proc/kallsyms";
fp = fopen(name, "r");
if (!fp)
{
fprintf(stderr, "Failed to open file %s err:%d\n", name, errno);
return 1;
}
debug("open %s success\n", name);
snprintf(sym, sizeof(sym), " %s", argv[1]);
debug("lookup for <%s>\n", sym);
while (fgets(line, sizeof(line), fp))
{
if (strstr(line, sym))
{
addr1 = strtoull(line, NULL, 16);
if (!fgets(line, sizeof(line), fp))
{
addr1 = 0;
fprintf(stderr, "Failed to read next line\n");
}
else
{
addr2 = strtoull(line, NULL, 16);
}
debug("addr1=<0x%llx> addr2=<0x%llx>\n", addr1, addr2);
break;
}
}
if (addr1 > addr2)
{
debug("Invalid addr range\n");
printf("0 0\n");
}
else
{
printf("0x%llx %llu\n", addr1, addr2 - addr1);
}
fclose(fp);
return 0;
}
// wrapper main
#ifndef BUILD_VTOY_TOOL
int main(int argc, char **argv)
{
return vtoyksym_main(argc, argv);
}
#endif