1/*-
2 * Copyright (c) 2003
3 * Bill Paul <wpaul@windriver.com>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/compat/ndis/subr_pe.c 151703 2005-10-26 18:46:27Z wpaul $");
35
36/*
37 * This file contains routines for relocating and dynamically linking
38 * executable object code files in the Windows(r) PE (Portable Executable)
39 * format. In Windows, anything with a .EXE, .DLL or .SYS extention is
40 * considered an executable, and all such files have some structures in
41 * common. The PE format was apparently based largely on COFF but has
42 * mutated significantly over time. We are mainly concerned with .SYS files,

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52#include <sys/types.h>
53#include <sys/errno.h>
54#ifdef _KERNEL
55#include <sys/systm.h>
56extern int ndis_strncasecmp(const char *, const char *, size_t);
57#define strncasecmp(a, b, c) ndis_strncasecmp(a, b, c)
58#else
59#include <stdio.h>
60#include <stddef.h>
61#include <stdlib.h>
62#include <unistd.h>
63#include <string.h>
64#endif
65
66#include <compat/ndis/pe_var.h>
67
68static vm_offset_t pe_functbl_match(image_patch_table *, char *);

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138
139 if (pe_is_nt_image(imgbase))
140 return (EINVAL);
141
142 dos_hdr = (image_dos_header *)(imgbase);
143 nt_hdr = (image_nt_header *)(imgbase + dos_hdr->idh_lfanew);
144
145 bcopy ((char *)&nt_hdr->inh_optionalhdr, (char *)hdr,
146 nt_hdr->inh_filehdr.ifh_optionalhdrlen);
147
148 return(0);
149}
150
151/*
152 * Return a copy of the file header. Contains the number of
153 * sections in this image.
154 */

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165 return(EINVAL);
166
167 if (pe_is_nt_image(imgbase))
168 return (EINVAL);
169
170 dos_hdr = (image_dos_header *)imgbase;
171 nt_hdr = (image_nt_header *)(imgbase + dos_hdr->idh_lfanew);
172
173 /*
174 * Note: the size of the nt_header is variable since it
175 * can contain optional fields, as indicated by ifh_optionalhdrlen.
176 * However it happens we're only interested in fields in the
177 * non-variant portion of the nt_header structure, so we don't
178 * bother copying the optional parts here.
179 */
180
181 bcopy ((char *)&nt_hdr->inh_filehdr, (char *)hdr,
182 sizeof(image_file_header));
183
184 return(0);
185}
186
187/*
188 * Return the header of the first section in this image (usually

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201 if (imgbase == 0 || hdr == NULL)
202 return(EINVAL);
203
204 if (pe_is_nt_image(imgbase))
205 return (EINVAL);
206
207 dos_hdr = (image_dos_header *)imgbase;
208 nt_hdr = (image_nt_header *)(imgbase + dos_hdr->idh_lfanew);
209 sect_hdr = IMAGE_FIRST_SECTION(nt_hdr);
210
211 bcopy ((char *)sect_hdr, (char *)hdr, sizeof(image_section_header));
212
213 return(0);
214}
215
216/*
217 * Return the number of sections in this executable, or 0 on error.

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283
284 if (pe_get_optional_header(imgbase, &opt_hdr))
285 return(0);
286
287 sections = pe_numsections(imgbase);
288
289 dos_hdr = (image_dos_header *)imgbase;
290 nt_hdr = (image_nt_header *)(imgbase + dos_hdr->idh_lfanew);
291 sect_hdr = IMAGE_FIRST_SECTION(nt_hdr);
292
293 /*
294 * The test here is to see if the RVA falls somewhere
295 * inside the section, based on the section's start RVA
296 * and its length. However it seems sometimes the
297 * virtual length isn't enough to cover the entire
298 * area of the section. We fudge by taking into account
299 * the section alignment and rounding the section length

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341
342 if (pe_is_nt_image(imgbase))
343 return (EINVAL);
344
345 sections = pe_numsections(imgbase);
346
347 dos_hdr = (image_dos_header *)imgbase;
348 nt_hdr = (image_nt_header *)(imgbase + dos_hdr->idh_lfanew);
349 sect_hdr = IMAGE_FIRST_SECTION(nt_hdr);
350
351 for (i = 0; i < sections; i++) {
352 if (!strcmp ((char *)&sect_hdr->ish_name, name)) {
353 bcopy((char *)sect_hdr, (char *)hdr,
354 sizeof(image_section_header));
355 return(0);
356 } else
357 sect_hdr++;

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