mirror of
https://github.com/taviso/loadlibrary
synced 2026-06-08 17:42:38 +00:00
Tavis Ormandy
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
//
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// Copyright (C) 2017 Tavis Ormandy
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (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,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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#include <unistd.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <search.h>
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#include <err.h>
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#include "winnt_types.h"
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#include "pe_linker.h"
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#include "ntoskernel.h"
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#include "util.h"
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#define MAX_EXTRA_EXPORTS 65535
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struct wrap_export extra_exports[MAX_EXTRA_EXPORTS];
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extern struct hsearch_data extraexports;
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static void __destructor cleanup_extra_exports(void)
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{
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hdestroy_r(&extraexports);
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}
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// This code is designed to parse a .MAP file produced by IDA.
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bool process_extra_exports(void *imagebase, size_t base, const char *filename)
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{
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char *name;
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uintptr_t address;
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size_t num = 0;
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FILE *exports;
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if ((exports = fopen(filename, "r")) == NULL) {
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return false;
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}
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hcreate_r(MAX_EXTRA_EXPORTS, &extraexports);
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while (!feof(exports)) {
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if (fscanf(exports, "%*X:%X %m[^\n]", &address, &name) == 2) {
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ENTRY e, *ep;
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e.key = name;
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e.data = (void *)((uintptr_t)(imagebase) + address + base);
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hsearch_r(e, ENTER, &ep, &extraexports);
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if (++num >= MAX_EXTRA_EXPORTS) {
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warn("large number of extra symbols in %s, increase MAX_EXTRA_EXPORTS and rebuild", filename);
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break;
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}
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} else {
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fgetc(exports);
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}
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}
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fclose(exports);
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return true;
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}
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