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/*-
* Copyright (c) 2016 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 <errno.h>
#include "_libpe.h"
ELFTC_VCSID("$Id: pe_buffer.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
PE_Buffer *
pe_getbuffer(PE_Scn *ps, PE_Buffer *pb)
{
PE *pe;
PE_SecBuf *sb;
if (ps == NULL) {
errno = EINVAL;
return (NULL);
}
pe = ps->ps_pe;
if ((ps->ps_flags & LIBPE_F_LOAD_SECTION) == 0) {
if (pe->pe_flags & LIBPE_F_FD_DONE) {
errno = EACCES;
return (NULL);
}
if (pe->pe_flags & LIBPE_F_SPECIAL_FILE) {
if (libpe_load_all_sections(pe) < 0)
return (NULL);
} else {
if (libpe_load_section(pe, ps) < 0)
return (NULL);
}
}
sb = (PE_SecBuf *) pb;
if (sb == NULL)
sb = STAILQ_FIRST(&ps->ps_b);
else
sb = STAILQ_NEXT(sb, sb_next);
return ((PE_Buffer *) sb);
}
PE_Buffer *
pe_newbuffer(PE_Scn *ps)
{
PE *pe;
PE_SecBuf *sb;
if (ps == NULL) {
errno = EINVAL;
return (NULL);
}
pe = ps->ps_pe;
if (pe->pe_flags & LIBPE_F_FD_DONE) {
errno = EACCES;
return (NULL);
}
if ((ps->ps_flags & LIBPE_F_LOAD_SECTION) == 0) {
if (libpe_load_section(pe, ps) < 0)
return (NULL);
}
if ((sb = libpe_alloc_buffer(ps, 0)) == NULL)
return (NULL);
sb->sb_flags |= PE_F_DIRTY;
ps->ps_flags |= PE_F_DIRTY;
return ((PE_Buffer *) sb);
}
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