1*839529caSEd Maste /*-
2*839529caSEd Maste * Copyright (c) 2016 Kai Wang
3*839529caSEd Maste * All rights reserved.
4*839529caSEd Maste *
5*839529caSEd Maste * Redistribution and use in source and binary forms, with or without
6*839529caSEd Maste * modification, are permitted provided that the following conditions
7*839529caSEd Maste * are met:
8*839529caSEd Maste * 1. Redistributions of source code must retain the above copyright
9*839529caSEd Maste * notice, this list of conditions and the following disclaimer.
10*839529caSEd Maste * 2. Redistributions in binary form must reproduce the above copyright
11*839529caSEd Maste * notice, this list of conditions and the following disclaimer in the
12*839529caSEd Maste * documentation and/or other materials provided with the distribution.
13*839529caSEd Maste *
14*839529caSEd Maste * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*839529caSEd Maste * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*839529caSEd Maste * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*839529caSEd Maste * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*839529caSEd Maste * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*839529caSEd Maste * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*839529caSEd Maste * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*839529caSEd Maste * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*839529caSEd Maste * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*839529caSEd Maste * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*839529caSEd Maste * SUCH DAMAGE.
25*839529caSEd Maste */
26*839529caSEd Maste
27*839529caSEd Maste #include <errno.h>
28*839529caSEd Maste
29*839529caSEd Maste #include "_libpe.h"
30*839529caSEd Maste
31*839529caSEd Maste ELFTC_VCSID("$Id: pe_buffer.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
32*839529caSEd Maste
33*839529caSEd Maste PE_Buffer *
pe_getbuffer(PE_Scn * ps,PE_Buffer * pb)34*839529caSEd Maste pe_getbuffer(PE_Scn *ps, PE_Buffer *pb)
35*839529caSEd Maste {
36*839529caSEd Maste PE *pe;
37*839529caSEd Maste PE_SecBuf *sb;
38*839529caSEd Maste
39*839529caSEd Maste if (ps == NULL) {
40*839529caSEd Maste errno = EINVAL;
41*839529caSEd Maste return (NULL);
42*839529caSEd Maste }
43*839529caSEd Maste
44*839529caSEd Maste pe = ps->ps_pe;
45*839529caSEd Maste
46*839529caSEd Maste if ((ps->ps_flags & LIBPE_F_LOAD_SECTION) == 0) {
47*839529caSEd Maste if (pe->pe_flags & LIBPE_F_FD_DONE) {
48*839529caSEd Maste errno = EACCES;
49*839529caSEd Maste return (NULL);
50*839529caSEd Maste }
51*839529caSEd Maste if (pe->pe_flags & LIBPE_F_SPECIAL_FILE) {
52*839529caSEd Maste if (libpe_load_all_sections(pe) < 0)
53*839529caSEd Maste return (NULL);
54*839529caSEd Maste } else {
55*839529caSEd Maste if (libpe_load_section(pe, ps) < 0)
56*839529caSEd Maste return (NULL);
57*839529caSEd Maste }
58*839529caSEd Maste }
59*839529caSEd Maste
60*839529caSEd Maste sb = (PE_SecBuf *) pb;
61*839529caSEd Maste
62*839529caSEd Maste if (sb == NULL)
63*839529caSEd Maste sb = STAILQ_FIRST(&ps->ps_b);
64*839529caSEd Maste else
65*839529caSEd Maste sb = STAILQ_NEXT(sb, sb_next);
66*839529caSEd Maste
67*839529caSEd Maste return ((PE_Buffer *) sb);
68*839529caSEd Maste }
69*839529caSEd Maste
70*839529caSEd Maste PE_Buffer *
pe_newbuffer(PE_Scn * ps)71*839529caSEd Maste pe_newbuffer(PE_Scn *ps)
72*839529caSEd Maste {
73*839529caSEd Maste PE *pe;
74*839529caSEd Maste PE_SecBuf *sb;
75*839529caSEd Maste
76*839529caSEd Maste if (ps == NULL) {
77*839529caSEd Maste errno = EINVAL;
78*839529caSEd Maste return (NULL);
79*839529caSEd Maste }
80*839529caSEd Maste
81*839529caSEd Maste pe = ps->ps_pe;
82*839529caSEd Maste
83*839529caSEd Maste if (pe->pe_flags & LIBPE_F_FD_DONE) {
84*839529caSEd Maste errno = EACCES;
85*839529caSEd Maste return (NULL);
86*839529caSEd Maste }
87*839529caSEd Maste
88*839529caSEd Maste if ((ps->ps_flags & LIBPE_F_LOAD_SECTION) == 0) {
89*839529caSEd Maste if (libpe_load_section(pe, ps) < 0)
90*839529caSEd Maste return (NULL);
91*839529caSEd Maste }
92*839529caSEd Maste
93*839529caSEd Maste if ((sb = libpe_alloc_buffer(ps, 0)) == NULL)
94*839529caSEd Maste return (NULL);
95*839529caSEd Maste
96*839529caSEd Maste sb->sb_flags |= PE_F_DIRTY;
97*839529caSEd Maste ps->ps_flags |= PE_F_DIRTY;
98*839529caSEd Maste
99*839529caSEd Maste return ((PE_Buffer *) sb);
100*839529caSEd Maste }
101