summaryrefslogtreecommitdiffhomepage
path: root/src/internal/perk_hdrdump_impl.c
blob: eadd7259b44e8ea53047587732c898a70600e72e (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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
/***************************************************************/
/*  perk: PE Resource Kit                                      */
/*  Copyright (C) 2015--2017  Z. Gilboa                        */
/*  Released under GPLv2 and GPLv3; see COPYING.PERK.          */
/***************************************************************/

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

#include <perk/perk.h>
#include "perk_hdrdump_impl.h"

#define PE_TABWIDTH	8
#define PE_HDRSPACE	40

static const char pe_hex_header_hex[] =
	"  0  1  2  3  4  5  6  7    8  9  a  b  c  d  e  f          01234567 89abcdef\n";

static const char pe_hex_header_dot[] =
	" .-------------------------------------------------.       .-----------------.\n";

static const char pe_hex_footer[] =
	"|---------------------------------------------------|      |-----------------|\n\n";

size_t pe_output_hex_header(
	char *		buf,
	const char *	sname,
	uint64_t	faddr,
	uint64_t	vaddr,
	int		bits)
{
	char *		ch;
	size_t		hlen;
	size_t		dlen;
	size_t		slen;
	size_t		nlen;
	uint32_t	high;
	uint32_t	low;

	ch   = buf;
	hlen = strlen(pe_hex_header_hex);
	dlen = strlen(pe_hex_header_dot);
	slen = strlen(sname);

	switch (bits) {
		case 32:
			low  = faddr;
			nlen = sprintf(ch,"faddr: 0x%08x\n",low);
			break;

		case 64:
			low  = faddr;
			high = faddr >> 32;
			nlen = sprintf(ch,"faddr: 0x%08x%08x\n",high,low);
			break;

		default:
			return -1;
	}

	ch += nlen;

	switch (bits) {
		case 32:
			low  = vaddr;
			nlen = sprintf(ch,"vaddr: 0x%08x",low);
			break;

		default:
			low  = vaddr;
			high = vaddr >> 32;
			nlen = sprintf(ch,"vaddr: 0x%08x%08x",high,low);
			break;
	}

	ch += nlen;
	memset(ch,' ',PE_HDRSPACE - nlen);
	ch += PE_HDRSPACE - nlen;

	memcpy(ch,pe_hex_header_hex,hlen);
	ch += hlen;

	memcpy(ch,sname,slen);

	ch += slen;
	memset(ch,' ',PE_HDRSPACE - slen);
	ch += PE_HDRSPACE - slen;

	memcpy(ch,pe_hex_header_dot,dlen);
	ch += dlen;

	return ch - buf;
}

size_t pe_output_hex_footer(char * buf)
{
	size_t	nlen;

	memset(buf,' ',PE_HDRSPACE);
	buf += PE_HDRSPACE;

	nlen = strlen(pe_hex_footer);
	memcpy(buf,pe_hex_footer,nlen);

	return PE_HDRSPACE + nlen;
}

size_t pe_output_raw_element(
	char *		ch,
	const void *	rdata,
	const char *	mname,
	uint32_t	moffset,
	uint32_t	msize)
{
	size_t			nlen;
	char *			base;
	uintptr_t		addr;
	const unsigned char *	src;
	const unsigned char *	cap;
	const unsigned char *	mark;
	size_t			pos;
	size_t			xpos;
	const char		xch[] = "0123456789abcdef";

	/* init */
	base = ch;

	/* pos */
	addr  = (uintptr_t)rdata;
	addr += moffset;
	pos   = addr % 0x10;
	xpos  = pos;

	/* struct member name */
	memset(ch,' ',PE_TABWIDTH);
	ch += PE_TABWIDTH;

	*ch++ = '.';
	nlen = strlen(mname);
	memcpy(ch,mname,nlen);

	ch += nlen;
	*ch++ = ':';

	/* hex dump column */
	nlen  = PE_HDRSPACE - PE_TABWIDTH - nlen - 2;
	memset(ch,' ',nlen);
	ch += nlen;

	*ch++ = '|';
	*ch++ = ' ';

	nlen = 3 * pos;
	memset(ch,' ',nlen);
	ch += nlen;

	if (pos >= 8) {
		*ch++ = ' ';
		*ch++ = ' ';
	}

	/* hex dump */
	src  = rdata;
	src += moffset;

	mark = src;
	cap  = src + msize;

	for (; src<cap; ) {
		*ch++ = xch[*src / 0x10];
		*ch++ = xch[*src % 0x10];
		*ch++ = ' ';

		/* pretty columns */
		if (pos == 7) {
			*ch++ = ' ';
			*ch++ = ' ';
		}

		/* binary dump needed? */
		if ((++src == cap) || (pos == 0xf)) {
			/* binary dump column */
			nlen  = 3 * (0xf - pos);
			nlen += (pos < 7) ? 2 : 0;

			memset(ch,' ',nlen);
			ch += nlen;

			*ch++ = '|';
			*ch++ = ' '; *ch++ = ' '; *ch++ = ' ';
			*ch++ = ' '; *ch++ = ' '; *ch++ = ' ';
			*ch++ = '|';

			nlen = xpos + (xpos >= 7);
			memset(ch,' ',nlen);
			ch += nlen;

			/* binary dump */
			for (; mark<src; ) {
				*ch++ = (*mark >= 0x20) && (*mark < 0x7f)
					? *mark : '.';

				/* pretty columns */
				if ((++mark < src) && (++xpos == 8)) {
					*ch++ = ' ';
					xpos  = 0;
				}
			}

			nlen  = 0xf - pos;
			nlen += (pos <= 7);

			memset(ch,' ',nlen);
			ch += nlen;

			*ch++ = '|';
			*ch++ = '\n';
		}

		/* does member hex dump span across more than one line? */
		if ((src < cap) && (++pos == 0x10)) {
			memset(ch,' ',PE_HDRSPACE);
			ch += PE_HDRSPACE;
			*ch++ = '|';
			*ch++ = ' ';

			mark = src;
			pos  = 0;
			xpos = 0;
		}
	}

	return ch - base;
}