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