summaryrefslogtreecommitdiffhomepage
path: root/src/arbits/slbt_armap_bsd_32.c
blob: f41c500178cee013f7386a1dd331720c183b40ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
/*******************************************************************/
/*  slibtool: a skinny libtool implementation, written in C        */
/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */
/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/

#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>

#include <slibtool/slibtool.h>
#include <slibtool/slibtool_arbits.h>
#include "slibtool_ar_impl.h"
#include "slibtool_driver_impl.h"
#include "slibtool_errinfo_impl.h"

int slbt_ar_parse_primary_armap_bsd_32(
	const struct slbt_driver_ctx *  dctx,
	struct slbt_archive_meta_impl * m)

{
	struct ar_raw_armap_bsd_32 *    armap;
	struct ar_meta_member_info *    memberp;
	struct ar_meta_armap_common_32 *armapref;
	struct ar_meta_armap_ref_32 *   symrefs;
	uint32_t                        idx;
	uint32_t                        uref;
	uint32_t                        attr;
	uint32_t                        nsyms;
	uint32_t                        nstrs;
	uint32_t                        sizeofrefs_le;
	uint32_t                        sizeofrefs_be;
	uint32_t                        sizeofrefs;
	uint32_t                        sizeofstrs;
	const char *                    ch;
	const char *                    cap;
	unsigned char *                 uch;
	unsigned char                   (*mark)[0x04];

	armap   = &m->armaps.armap_bsd_32;
	memberp = m->memberv[0];

	mark = memberp->ar_object_data;

	armap->ar_size_of_refs = mark;
	uch = *mark++;

	armap->ar_first_name_offset = mark;

	sizeofrefs_le = (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0];
	sizeofrefs_be = (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];

	if (sizeofrefs_le < memberp->ar_object_size - sizeof(*mark)) {
		sizeofrefs = sizeofrefs_le;
		attr       = AR_ARMAP_ATTR_LE_32;

	} else if (sizeofrefs_be < memberp->ar_object_size - sizeof(*mark)) {
		sizeofrefs = sizeofrefs_be;
		attr       = AR_ARMAP_ATTR_BE_32;
	} else {
		return SLBT_CUSTOM_ERROR(
			dctx,
			SLBT_ERR_AR_INVALID_ARMAP_SIZE_OF_REFS);
	}

	nsyms  = sizeofrefs / sizeof(struct ar_raw_armap_ref_32);
	mark  += (sizeofrefs / sizeof(*mark));

	armap->ar_size_of_strs = mark;
	uch = *mark++;

	sizeofstrs = (attr == AR_ARMAP_ATTR_LE_32)
		? (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0]
		: (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];

	if (sizeofstrs > memberp->ar_object_size - 2*sizeof(*mark) - sizeofrefs)
		return SLBT_CUSTOM_ERROR(
			dctx,
			SLBT_ERR_AR_INVALID_ARMAP_SIZE_OF_STRS);

	m->symstrs = (const char *)mark;

	cap  = m->symstrs;
	cap += sizeofstrs;

	if ((cap == m->symstrs) && nsyms)
		return SLBT_CUSTOM_ERROR(
			dctx,
			SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);

	if (nsyms && !m->symstrs[0])
		return SLBT_CUSTOM_ERROR(
			dctx,
			SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);

	for (ch=&m->symstrs[1],nstrs=0; ch<cap; ch++) {
		if (!ch[0] && !ch[-1] && (nstrs < nsyms))
			return SLBT_CUSTOM_ERROR(
				dctx,
				SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);

		if (!ch[0] && ch[-1] && (nstrs < nsyms))
			nstrs++;
	}

	if (nstrs != nsyms)
		return SLBT_CUSTOM_ERROR(
			dctx,
			SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);

	if (!(m->symstrv = calloc(nsyms + 1,sizeof(const char *))))
		return SLBT_SYSTEM_ERROR(dctx,0);

	if (!(m->armaps.armap_symrefs_32 = calloc(nsyms + 1,sizeof(*symrefs))))
		return SLBT_SYSTEM_ERROR(dctx,0);

	mark    = armap->ar_first_name_offset;
	symrefs = m->armaps.armap_symrefs_32;

	for (idx=0; idx<nsyms; idx++) {
		uch  = *mark++;

		uref = (attr == AR_ARMAP_ATTR_BE_32)
			? (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3]
			: (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0];

		symrefs[idx].ar_name_offset = uref;

		uch  = *mark++;

		uref = (attr == AR_ARMAP_ATTR_BE_32)
			? (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3]
			: (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0];

		symrefs[idx].ar_member_offset = uref;
	}

	armap->ar_string_table = m->symstrv;

	armapref = &m->armaps.armap_common_32;
	armapref->ar_member         = memberp;
	armapref->ar_symrefs        = symrefs;
	armapref->ar_armap_bsd      = armap;
	armapref->ar_armap_attr     = AR_ARMAP_ATTR_BSD | attr;
	armapref->ar_num_of_symbols = nsyms;
	armapref->ar_size_of_refs   = sizeofrefs;
	armapref->ar_size_of_strs   = sizeofstrs;
	armapref->ar_string_table   = m->symstrs;

	m->armaps.armap_nsyms = nsyms;

	m->armeta.a_armap_primary.ar_armap_common_32 = armapref;

	return 0;
}