1 /*-
2 * Copyright (c) 2016 Kai Wang
3 * 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
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <errno.h>
28
29 #include "_libpe.h"
30
31 ELFTC_VCSID("$Id: pe_symtab.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
32
33 int
pe_update_symtab(PE * pe,char * symtab,size_t sz,unsigned int nsym)34 pe_update_symtab(PE *pe, char *symtab, size_t sz, unsigned int nsym)
35 {
36 PE_Scn *ps, *pstmp;
37 PE_SecBuf *sb;
38 PE_SecHdr *sh;
39
40 if (pe == NULL || symtab == NULL || sz == 0) {
41 errno = EINVAL;
42 return (-1);
43 }
44
45 if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) {
46 errno = EACCES;
47 return (-1);
48 }
49
50 /* Remove the old symbol table. */
51 STAILQ_FOREACH_SAFE(ps, &pe->pe_scn, ps_next, pstmp) {
52 if (ps->ps_ndx == 0xFFFFFFFFU)
53 libpe_release_scn(ps);
54 }
55
56 /*
57 * Insert the new symbol table.
58 */
59
60 if ((ps = libpe_alloc_scn(pe)) == NULL)
61 return (-1);
62
63 STAILQ_INSERT_TAIL(&pe->pe_scn, ps, ps_next);
64 ps->ps_ndx = 0xFFFFFFFFU;
65 ps->ps_flags |= PE_F_DIRTY;
66
67 /*
68 * Set the symbol table section offset to the maximum to make sure
69 * that it will be placed in the end of the file during section
70 * layout.
71 */
72 sh = &ps->ps_sh;
73 sh->sh_rawptr = 0xFFFFFFFFU;
74 sh->sh_rawsize = sz;
75
76 /* Allocate the buffer. */
77 if ((sb = libpe_alloc_buffer(ps, 0)) == NULL)
78 return (-1);
79 sb->sb_flags |= PE_F_DIRTY;
80 sb->sb_pb.pb_size = sz;
81 sb->sb_pb.pb_buf = symtab;
82
83 pe->pe_nsym = nsym;
84
85 return (0);
86 }
87