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/*-
* Copyright (c) 2015 Kai Wang
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "_libpe.h"
ELFTC_VCSID("$Id: pe_dos.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
PE_DosHdr *
pe_msdos_header(PE *pe)
{
if (pe == NULL) {
errno = EINVAL;
return (NULL);
}
if (pe->pe_dh == NULL) {
errno = ENOENT;
return (NULL);
}
return (pe->pe_dh);
}
char *
pe_msdos_stub(PE *pe, size_t *len)
{
if (pe == NULL || len == NULL) {
errno = EINVAL;
return (NULL);
}
if (pe->pe_stub_ex > 0 &&
(pe->pe_flags & LIBPE_F_LOAD_DOS_STUB) == 0) {
assert((pe->pe_flags & LIBPE_F_SPECIAL_FILE) == 0);
(void) libpe_read_msdos_stub(pe);
}
*len = sizeof(PE_DosHdr) + pe->pe_stub_ex;
return (pe->pe_stub);
}
int
ps_update_msdos_header(PE *pe, PE_DosHdr *dh)
{
if (pe == NULL || dh == NULL) {
errno = EINVAL;
return (-1);
}
if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) {
errno = EACCES;
return (-1);
}
if (pe->pe_dh == NULL) {
if ((pe->pe_dh = malloc(sizeof(PE_DosHdr))) == NULL) {
errno = ENOMEM;
return (-1);
}
}
*pe->pe_dh = *dh;
pe->pe_flags |= LIBPE_F_DIRTY_DOS_HEADER;
return (0);
}
int
ps_update_msdos_stub(PE *pe, char *dos_stub, size_t sz)
{
if (pe == NULL || dos_stub == NULL || sz == 0) {
errno = EINVAL;
return (-1);
}
if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) {
errno = EACCES;
return (-1);
}
pe->pe_stub_app = dos_stub;
pe->pe_stub_app_sz = sz;
return (0);
}
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