mon/src/mon_cmd.cpp

/*
 *  mon_cmd.cpp - mon standard commands
 *
 *  mon (C) 1997-1999 Christian Bauer, Marc Hellwig
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "sysdeps.h"

#include <stdlib.h>

#include "mon.h"
#include "mon_cmd.h"
#include "mon_disass.h"

#ifndef VERSION
#define VERSION "2"
#endif


/*
 *  range_args = [expression] [[COMMA] expression] END
 *
 *  Read start address to "adr", end address to "end_adr".
 *  "adr" defaults to '.', "end_adr" defaults to '.'+def_range
 *
 *  true: OK, false: Error
 */

static bool range_args(uint32 *adr, uint32 *end_adr, uint32 def_range)
{
        *adr = mon_dot_address;
        *end_adr = mon_dot_address + def_range;

        if (mon_token == T_END)
                return true;
        else {
                if (!mon_expression(adr))
                        return false;
                *end_adr = *adr + def_range;
                if (mon_token == T_END)
                        return true;
                else {
                        if (mon_token == T_COMMA) mon_get_token();
                        if (!mon_expression(end_adr))
                                return false;
                        return mon_token == T_END;
                }
        }
}


/*
 *  byte_string = (expression | STRING) {COMMA (expression | STRING)} END
 */

static bool byte_string(uint8 *s, uint32 &len)
{
        uint32 value;

        len = 0;
        goto start;

        for (;;) {
                if (mon_token == T_COMMA) {
                        mon_get_token();

start:
                        if (mon_token == T_STRING) {
                                uint8 *p = (uint8 *)mon_string;
                                while ((*s++ = *p++) != 0) ;
                                s--;
                                len += strlen(mon_string);
                                mon_get_token();
                        } else if (mon_expression(&value)) {
                                *s++ = value;
                                len++;
                        } else
                                return false;

                } else if (mon_token == T_END)
                        return true;
                else {
                        mon_error("',' expected");
                        return false;
                }
        }
}


/*
 *  Convert character to printable character
 */

static inline uint8 char2print(uint8 c)
{
        return (c >= 0x20 && c <= 0x7e) ? c : '.';
}


/*
 *  Show version
 *  ver
 */

void version(void)
{
        fprintf(monout, "mon V" VERSION "\n");
}


/*
 *  Redirect output
 *  o [file]
 */

void redir_output(void)
{
        // Close old file
        if (monout != monerr) {
                fclose(monout);
                monout = monerr;
                return;
        }

        // No argument given?
        if (mon_token == T_END)
                return;

        // Otherwise open file
        if (mon_token == T_STRING) {
                mon_get_token();
                if (mon_token != T_END) {
                        mon_error("Too many arguments");
                        return;
                }
                if (!(monout = fopen(mon_string, "w")))
                        mon_error("Unable to open file");
        } else
                mon_error("'\"' around file name expected");
}


/*
 *  Compute and display expression
 *  ? expression
 */

void print_expr(void)
{
        uint32 val;

        if (!mon_expression(&val))
                return;
        if (mon_token != T_END) {
                mon_error("Too many arguments");
                return;
        }

        if (val > 0x7fffffff) {
                fprintf(monout, "Hex unsigned:  $%08x\n"
                                          "Hex signed  : -$%08x\n"
                                          "Dec unsigned:  %u\n"
                                          "Dec signed  : %d\n", val, -val, val, val);
                fprintf(monout, "Char        : '%c%c%c%c'\n", char2print(val >> 24), char2print(val >> 16), char2print(val >> 8), char2print(val));
        } else {
                fprintf(monout, "Hex : $%08x\n"
                                          "Dec : %d\n", val, val);
                fprintf(monout, "Char: '%c%c%c%c'\n", char2print(val >> 24), char2print(val >> 16), char2print(val >> 8), char2print(val));
        }
}


/*
 *  Execute shell command
 *  \ "command"
 */

void shell_command(void)
{
        if (mon_token != T_STRING) {
                mon_error("'\"' around command expected");
                return;
        }
        mon_get_token();
        if (mon_token != T_END) {
                mon_error("Too many arguments");
                return;
        }
        system(mon_string);
}


/*
 *  Memory dump
 *  m [start [end]]
 */

#define MEMDUMP_BPL 16  // Bytes per line

void memory_dump(void)
{
        uint32 adr, end_adr;
        uint8 mem[MEMDUMP_BPL + 1];

        mem[MEMDUMP_BPL] = 0;

        if (!range_args(&adr, &end_adr, 16 * MEMDUMP_BPL - 1))  // 16 lines unless end address specified
                return;

        while (adr <= end_adr && !mon_aborted()) {
                fprintf(monout, "%08x:", mon_use_real_mem ? adr: adr % mon_mem_size);
                for (int i=0; i<MEMDUMP_BPL; i++, adr++) {
                        if (i % 4 == 0)
                                fprintf(monout, " %08x", mon_read_word(adr));
                        mem[i] = char2print(mon_read_byte(adr));
                }
                fprintf(monout, "  '%s'\n", mem);
        }

        mon_dot_address = adr;
}


/*
 *  ASCII dump
 *  i [start [end]]
 */

#define ASCIIDUMP_BPL 64  // Bytes per line

void ascii_dump(void)
{
        uint32 adr, end_adr;
        uint8 str[ASCIIDUMP_BPL + 1];

        str[ASCIIDUMP_BPL] = 0;

        if (!range_args(&adr, &end_adr, 16 * ASCIIDUMP_BPL - 1))  // 16 lines unless end address specified
                return;

        while (adr <= end_adr && !mon_aborted()) {
                fprintf(monout, "%08x:", mon_use_real_mem ? adr : adr % mon_mem_size);
                for (int i=0; i<ASCIIDUMP_BPL; i++, adr++)
                        str[i] = char2print(mon_read_byte(adr));
                fprintf(monout, " '%s'\n", str);
        }

        mon_dot_address = adr;
}


/*
 *  Binary dump
 *  b [start [end]]
 */

void binary_dump(void)
{
        uint32 adr, end_adr;
        uint8 str[9];

        str[8] = 0;

        if (!range_args(&adr, &end_adr, 7))  // 8 lines unless end address specified
                return;

        while (adr <= end_adr && !mon_aborted()) {
                fprintf(monout, "%08x:", mon_use_real_mem ? adr : adr % mon_mem_size);
                uint8 b = mon_read_byte(adr);
                for (int m=0x80, i=0; i<8; m>>=1, i++)
                        str[i] = (b & m) ? '*' : '.';
                fprintf(monout, " '%s'\n", str);
                adr++;
        }

        mon_dot_address = adr;
}


/*
 *  Disassemble
 *  d [start [end]]
 *  d65 [start [end]]
 *  d68 [start [end]]
 *  d80 [start [end]]
 *  d86 [start [end]]
 */

enum CPUType {
        CPU_PPC,
        CPU_6502,
        CPU_680x0,
        CPU_8080,
        CPU_80x86_32,
        CPU_80x86_16
};

static void disassemble(CPUType type)
{
        uint32 adr, end_adr;

        if (!range_args(&adr, &end_adr, 16 * 4 - 1))  // 16 lines unless end address specified
                return;

        switch (type) {
                case CPU_PPC:
                        while (adr <= end_adr && !mon_aborted()) {
                                uint32 w = mon_read_word(adr);
                                fprintf(monout, "%08x: %08x\t", mon_use_real_mem ? adr : adr % mon_mem_size, w);
                                disass_ppc(monout, mon_use_real_mem ? adr : adr % mon_mem_size, w);
                                adr += 4;
                        }
                        break;

                case CPU_6502:
                        while (adr <= end_adr && !mon_aborted()) {
                                uint8 op = mon_read_byte(adr);
                                uint8 lo = mon_read_byte(adr + 1);
                                uint8 hi = mon_read_byte(adr + 2);
                                fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
                                adr += disass_6502(monout, mon_use_real_mem ? adr : adr % mon_mem_size, op, lo, hi);
                        }
                        break;

                case CPU_680x0:
                        while (adr <= end_adr && !mon_aborted()) {
                                fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
                                adr += disass_68k(monout, mon_use_real_mem ? adr : adr % mon_mem_size);
                        }
                        break;

                case CPU_8080:
                        while (adr <= end_adr && !mon_aborted()) {
                                uint8 op = mon_read_byte(adr);
                                uint8 lo = mon_read_byte(adr + 1);
                                uint8 hi = mon_read_byte(adr + 2);
                                fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
                                adr += disass_8080(monout, mon_use_real_mem ? adr : adr % mon_mem_size, op, lo, hi);
                        }
                        break;

                case CPU_80x86_32:
                        while (adr <= end_adr && !mon_aborted()) {
                                fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
                                adr += disass_x86(monout, mon_use_real_mem ? adr : adr % mon_mem_size, false);
                        }
                        break;

                case CPU_80x86_16:
                        while (adr <= end_adr && !mon_aborted()) {
                                fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
                                adr += disass_x86(monout, mon_use_real_mem ? adr : adr % mon_mem_size, true);
                        }
                        break;
        }

        mon_dot_address = adr;
}

void disassemble_ppc(void)
{
        disassemble(CPU_PPC);
}

void disassemble_6502(void)
{
        disassemble(CPU_6502);
}

void disassemble_680x0(void)
{
        disassemble(CPU_680x0);
}

void disassemble_8080(void)
{
        disassemble(CPU_8080);
}

void disassemble_80x86_32(void)
{
        disassemble(CPU_80x86_32);
}

void disassemble_80x86_16(void)
{
        disassemble(CPU_80x86_16);
}


/*
 *  Modify memory
 *  : addr bytestring
 */

void modify(void)
{
        uint32 adr, len, src_adr = 0;
        uint8 str[256];

        if (!mon_expression(&adr))
                return;
        if (!byte_string(str, len))
                return;

        while (src_adr < len)
                mon_write_byte(adr++, str[src_adr++]);

        mon_dot_address = adr;
}


/*
 *  Fill
 *  f start end bytestring
 */

void fill(void)
{
        uint32 adr, end_adr, len, src_adr = 0;
        uint8 str[256];

        if (!mon_expression(&adr))
                return;
        if (!mon_expression(&end_adr))
                return;
        if (!byte_string(str, len))
                return;

        while (adr <= end_adr)
                mon_write_byte(adr++, str[src_adr++ % len]);
}


/*
 *  Transfer memory
 *  t start end dest
 */

void transfer(void)
{
        uint32 adr, end_adr, dest;
        int num;

        if (!mon_expression(&adr))
                return;
        if (!mon_expression(&end_adr))
                return;
        if (!mon_expression(&dest))
                return;
        if (mon_token != T_END) {
                mon_error("Too many arguments");
                return;
        }

        num = end_adr - adr + 1;

        if (dest < adr)
                for (int i=0; i<num; i++)
                        mon_write_byte(dest++, mon_read_byte(adr++));
        else {
                dest += end_adr - adr;
                for (int i=0; i<num; i++)
                        mon_write_byte(dest--, mon_read_byte(end_adr--));
        }
}


/*
 *  Compare
 *  c start end dest
 */

void compare(void)
{
        uint32 adr, end_adr, dest;
        int num = 0;

        if (!mon_expression(&adr))
                return;
        if (!mon_expression(&end_adr))
                return;
        if (!mon_expression(&dest))
                return;
        if (mon_token != T_END) {
                mon_error("Too many arguments");
                return;
        }

        while (adr <= end_adr && !mon_aborted()) {
                if (mon_read_byte(adr) != mon_read_byte(dest)) {
                        fprintf(monout, "%08x ", mon_use_real_mem ? adr : adr % mon_mem_size);
                        num++;
                        if (!(num & 7))
                                fputc('\n', monout);
                }
                adr++; dest++;
        }

        if (num & 7)
                fputc('\n', monout);
        fprintf(monout, "%d byte(s) different\n", num);
}


/*
 *  Search for byte string
 *  h start end bytestring
 */

void hunt(void)
{
        uint32 adr, end_adr, len;
        uint8 str[256];
        int num = 0;

        if (!mon_expression(&adr))
                return;
        if (!mon_expression(&end_adr))
                return;
        if (!byte_string(str, len))
                return;

        while ((adr+len-1) <= end_adr && !mon_aborted()) {
                uint32 i;

                for (i=0; i<len; i++)
                        if (mon_read_byte(adr + i) != str[i])
                                break;

                if (i == len) {
                        fprintf(monout, "%08x ", mon_use_real_mem ? adr : adr % mon_mem_size);
                        num++;
                        if (num == 1)
                                mon_dot_address = adr;
                        if (!(num & 7))
                                fputc('\n', monout);
                }
                adr++;
        }

        if (num & 7)
                fputc('\n', monout);
        fprintf(monout, "Found %d occurrences\n", num);
}


/*
 *  Load data
 *  [ start "file"
 */

void load_data(void)
{
        uint32 start_adr;
        FILE *file;
        int fc;

        if (!mon_expression(&start_adr))
                return;
        if (mon_token == T_END) {
                mon_error("Missing file name");
                return;
        }
        if (mon_token != T_STRING) {
                mon_error("'\"' around file name expected");
                return;
        }
        mon_get_token();
        if (mon_token != T_END) {
                mon_error("Too many arguments");
                return;
        }

        if (!(file = fopen(mon_string, "rb")))
                mon_error("Unable to open file");
        else {
                uint32 adr = start_adr;

                while ((fc = fgetc(file)) != EOF)
                        mon_write_byte(adr++, fc);
                fclose(file);

                fprintf(monerr, "%08x bytes read from %08x to %08x\n", adr - start_adr, mon_use_real_mem ? start_adr : start_adr % mon_mem_size, mon_use_real_mem ? adr-1 : (adr-1) % mon_mem_size);
                mon_dot_address = adr;
        }
}


/*
 *  Save data
 *  ] start size "file"
 */

void save_data(void)
{
        uint32 start_adr, size;
        FILE *file;

        if (!mon_expression(&start_adr))
                return;
        if (!mon_expression(&size))
                return;
        if (mon_token == T_END) {
                mon_error("Missing file name");
                return;
        }
        if (mon_token != T_STRING) {
                mon_error("'\"' around file name expected");
                return;
        }
        mon_get_token();
        if (mon_token != T_END) {
                mon_error("Too many arguments");
                return;
        }

        if (!(file = fopen(mon_string, "wb")))
                mon_error("Unable to create file");
        else {
                uint32 adr = start_adr, end_adr = start_adr + size - 1;

                while (adr <= end_adr)
                        fputc(mon_read_byte(adr++), file);
                fclose(file);

                fprintf(monerr, "%08x bytes written from %08x to %08x\n", size, mon_use_real_mem ? start_adr : start_adr % mon_mem_size, mon_use_real_mem ? end_adr : end_adr % mon_mem_size);
        }
}
Revision:	1.8
Committed:	2000-10-06T00:04:22Z (24 years, 1 month ago) by cebix
Branch:	MAIN
Changes since 1.7:	+18 -5 lines
Log Message:	new command "d8086" for disassembling 16-bit x86 code
#	Content
1	/*
2	* mon_cmd.cpp - mon standard commands
3	*
4	* mon (C) 1997-1999 Christian Bauer, Marc Hellwig
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20
21	#include "sysdeps.h"
22
23	#include <stdlib.h>
24
25	#include "mon.h"
26	#include "mon_cmd.h"
27	#include "mon_disass.h"
28
29	#ifndef VERSION
30	#define VERSION "2"
31	#endif
32
33
34	/*
35	* range_args = [expression] [[COMMA] expression] END
36	*
37	* Read start address to "adr", end address to "end_adr".
38	* "adr" defaults to '.', "end_adr" defaults to '.'+def_range
39	*
40	* true: OK, false: Error
41	*/
42
43	static bool range_args(uint32 adr, uint32 end_adr, uint32 def_range)
44	{
45	*adr = mon_dot_address;
46	*end_adr = mon_dot_address + def_range;
47
48	if (mon_token == T_END)
49	return true;
50	else {
51	if (!mon_expression(adr))
52	return false;
53	end_adr = adr + def_range;
54	if (mon_token == T_END)
55	return true;
56	else {
57	if (mon_token == T_COMMA) mon_get_token();
58	if (!mon_expression(end_adr))
59	return false;
60	return mon_token == T_END;
61	}
62	}
63	}
64
65
66	/*
67	* byte_string = (expression \| STRING) {COMMA (expression \| STRING)} END
68	*/
69
70	static bool byte_string(uint8 *s, uint32 &len)
71	{
72	uint32 value;
73
74	len = 0;
75	goto start;
76
77	for (;;) {
78	if (mon_token == T_COMMA) {
79	mon_get_token();
80
81	start:
82	if (mon_token == T_STRING) {
83	uint8 p = (uint8 )mon_string;
84	while ((s++ = p++) != 0) ;
85	s--;
86	len += strlen(mon_string);
87	mon_get_token();
88	} else if (mon_expression(&value)) {
89	*s++ = value;
90	len++;
91	} else
92	return false;
93
94	} else if (mon_token == T_END)
95	return true;
96	else {
97	mon_error("',' expected");
98	return false;
99	}
100	}
101	}
102
103
104	/*
105	* Convert character to printable character
106	*/
107
108	static inline uint8 char2print(uint8 c)
109	{
110	return (c >= 0x20 && c <= 0x7e) ? c : '.';
111	}
112
113
114	/*
115	* Show version
116	* ver
117	*/
118
119	void version(void)
120	{
121	fprintf(monout, "mon V" VERSION "\n");
122	}
123
124
125	/*
126	* Redirect output
127	* o [file]
128	*/
129
130	void redir_output(void)
131	{
132	// Close old file
133	if (monout != monerr) {
134	fclose(monout);
135	monout = monerr;
136	return;
137	}
138
139	// No argument given?
140	if (mon_token == T_END)
141	return;
142
143	// Otherwise open file
144	if (mon_token == T_STRING) {
145	mon_get_token();
146	if (mon_token != T_END) {
147	mon_error("Too many arguments");
148	return;
149	}
150	if (!(monout = fopen(mon_string, "w")))
151	mon_error("Unable to open file");
152	} else
153	mon_error("'\"' around file name expected");
154	}
155
156
157	/*
158	* Compute and display expression
159	* ? expression
160	*/
161
162	void print_expr(void)
163	{
164	uint32 val;
165
166	if (!mon_expression(&val))
167	return;
168	if (mon_token != T_END) {
169	mon_error("Too many arguments");
170	return;
171	}
172
173	if (val > 0x7fffffff) {
174	fprintf(monout, "Hex unsigned: $%08x\n"
175	"Hex signed : -$%08x\n"
176	"Dec unsigned: %u\n"
177	"Dec signed : %d\n", val, -val, val, val);
178	fprintf(monout, "Char : '%c%c%c%c'\n", char2print(val >> 24), char2print(val >> 16), char2print(val >> 8), char2print(val));
179	} else {
180	fprintf(monout, "Hex : $%08x\n"
181	"Dec : %d\n", val, val);
182	fprintf(monout, "Char: '%c%c%c%c'\n", char2print(val >> 24), char2print(val >> 16), char2print(val >> 8), char2print(val));
183	}
184	}
185
186
187	/*
188	* Execute shell command
189	* \ "command"
190	*/
191
192	void shell_command(void)
193	{
194	if (mon_token != T_STRING) {
195	mon_error("'\"' around command expected");
196	return;
197	}
198	mon_get_token();
199	if (mon_token != T_END) {
200	mon_error("Too many arguments");
201	return;
202	}
203	system(mon_string);
204	}
205
206
207	/*
208	* Memory dump
209	* m [start [end]]
210	*/
211
212	#define MEMDUMP_BPL 16 // Bytes per line
213
214	void memory_dump(void)
215	{
216	uint32 adr, end_adr;
217	uint8 mem[MEMDUMP_BPL + 1];
218
219	mem[MEMDUMP_BPL] = 0;
220
221	if (!range_args(&adr, &end_adr, 16 * MEMDUMP_BPL - 1)) // 16 lines unless end address specified
222	return;
223
224	while (adr <= end_adr && !mon_aborted()) {
225	fprintf(monout, "%08x:", mon_use_real_mem ? adr: adr % mon_mem_size);
226	for (int i=0; i<MEMDUMP_BPL; i++, adr++) {
227	if (i % 4 == 0)
228	fprintf(monout, " %08x", mon_read_word(adr));
229	mem[i] = char2print(mon_read_byte(adr));
230	}
231	fprintf(monout, " '%s'\n", mem);
232	}
233
234	mon_dot_address = adr;
235	}
236
237
238	/*
239	* ASCII dump
240	* i [start [end]]
241	*/
242
243	#define ASCIIDUMP_BPL 64 // Bytes per line
244
245	void ascii_dump(void)
246	{
247	uint32 adr, end_adr;
248	uint8 str[ASCIIDUMP_BPL + 1];
249
250	str[ASCIIDUMP_BPL] = 0;
251
252	if (!range_args(&adr, &end_adr, 16 * ASCIIDUMP_BPL - 1)) // 16 lines unless end address specified
253	return;
254
255	while (adr <= end_adr && !mon_aborted()) {
256	fprintf(monout, "%08x:", mon_use_real_mem ? adr : adr % mon_mem_size);
257	for (int i=0; i<ASCIIDUMP_BPL; i++, adr++)
258	str[i] = char2print(mon_read_byte(adr));
259	fprintf(monout, " '%s'\n", str);
260	}
261
262	mon_dot_address = adr;
263	}
264
265
266	/*
267	* Binary dump
268	* b [start [end]]
269	*/
270
271	void binary_dump(void)
272	{
273	uint32 adr, end_adr;
274	uint8 str[9];
275
276	str[8] = 0;
277
278	if (!range_args(&adr, &end_adr, 7)) // 8 lines unless end address specified
279	return;
280
281	while (adr <= end_adr && !mon_aborted()) {
282	fprintf(monout, "%08x:", mon_use_real_mem ? adr : adr % mon_mem_size);
283	uint8 b = mon_read_byte(adr);
284	for (int m=0x80, i=0; i<8; m>>=1, i++)
285	str[i] = (b & m) ? '*' : '.';
286	fprintf(monout, " '%s'\n", str);
287	adr++;
288	}
289
290	mon_dot_address = adr;
291	}
292
293
294	/*
295	* Disassemble
296	* d [start [end]]
297	* d65 [start [end]]
298	* d68 [start [end]]
299	* d80 [start [end]]
300	* d86 [start [end]]
301	*/
302
303	enum CPUType {
304	CPU_PPC,
305	CPU_6502,
306	CPU_680x0,
307	CPU_8080,
308	CPU_80x86_32,
309	CPU_80x86_16
310	};
311
312	static void disassemble(CPUType type)
313	{
314	uint32 adr, end_adr;
315
316	if (!range_args(&adr, &end_adr, 16 * 4 - 1)) // 16 lines unless end address specified
317	return;
318
319	switch (type) {
320	case CPU_PPC:
321	while (adr <= end_adr && !mon_aborted()) {
322	uint32 w = mon_read_word(adr);
323	fprintf(monout, "%08x: %08x\t", mon_use_real_mem ? adr : adr % mon_mem_size, w);
324	disass_ppc(monout, mon_use_real_mem ? adr : adr % mon_mem_size, w);
325	adr += 4;
326	}
327	break;
328
329	case CPU_6502:
330	while (adr <= end_adr && !mon_aborted()) {
331	uint8 op = mon_read_byte(adr);
332	uint8 lo = mon_read_byte(adr + 1);
333	uint8 hi = mon_read_byte(adr + 2);
334	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
335	adr += disass_6502(monout, mon_use_real_mem ? adr : adr % mon_mem_size, op, lo, hi);
336	}
337	break;
338
339	case CPU_680x0:
340	while (adr <= end_adr && !mon_aborted()) {
341	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
342	adr += disass_68k(monout, mon_use_real_mem ? adr : adr % mon_mem_size);
343	}
344	break;
345
346	case CPU_8080:
347	while (adr <= end_adr && !mon_aborted()) {
348	uint8 op = mon_read_byte(adr);
349	uint8 lo = mon_read_byte(adr + 1);
350	uint8 hi = mon_read_byte(adr + 2);
351	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
352	adr += disass_8080(monout, mon_use_real_mem ? adr : adr % mon_mem_size, op, lo, hi);
353	}
354	break;
355
356	case CPU_80x86_32:
357	while (adr <= end_adr && !mon_aborted()) {
358	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
359	adr += disass_x86(monout, mon_use_real_mem ? adr : adr % mon_mem_size, false);
360	}
361	break;
362
363	case CPU_80x86_16:
364	while (adr <= end_adr && !mon_aborted()) {
365	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
366	adr += disass_x86(monout, mon_use_real_mem ? adr : adr % mon_mem_size, true);
367	}
368	break;
369	}
370
371	mon_dot_address = adr;
372	}
373
374	void disassemble_ppc(void)
375	{
376	disassemble(CPU_PPC);
377	}
378
379	void disassemble_6502(void)
380	{
381	disassemble(CPU_6502);
382	}
383
384	void disassemble_680x0(void)
385	{
386	disassemble(CPU_680x0);
387	}
388
389	void disassemble_8080(void)
390	{
391	disassemble(CPU_8080);
392	}
393
394	void disassemble_80x86_32(void)
395	{
396	disassemble(CPU_80x86_32);
397	}
398
399	void disassemble_80x86_16(void)
400	{
401	disassemble(CPU_80x86_16);
402	}
403
404
405	/*
406	* Modify memory
407	* : addr bytestring
408	*/
409
410	void modify(void)
411	{
412	uint32 adr, len, src_adr = 0;
413	uint8 str[256];
414
415	if (!mon_expression(&adr))
416	return;
417	if (!byte_string(str, len))
418	return;
419
420	while (src_adr < len)
421	mon_write_byte(adr++, str[src_adr++]);
422
423	mon_dot_address = adr;
424	}
425
426
427	/*
428	* Fill
429	* f start end bytestring
430	*/
431
432	void fill(void)
433	{
434	uint32 adr, end_adr, len, src_adr = 0;
435	uint8 str[256];
436
437	if (!mon_expression(&adr))
438	return;
439	if (!mon_expression(&end_adr))
440	return;
441	if (!byte_string(str, len))
442	return;
443
444	while (adr <= end_adr)
445	mon_write_byte(adr++, str[src_adr++ % len]);
446	}
447
448
449	/*
450	* Transfer memory
451	* t start end dest
452	*/
453
454	void transfer(void)
455	{
456	uint32 adr, end_adr, dest;
457	int num;
458
459	if (!mon_expression(&adr))
460	return;
461	if (!mon_expression(&end_adr))
462	return;
463	if (!mon_expression(&dest))
464	return;
465	if (mon_token != T_END) {
466	mon_error("Too many arguments");
467	return;
468	}
469
470	num = end_adr - adr + 1;
471
472	if (dest < adr)
473	for (int i=0; i<num; i++)
474	mon_write_byte(dest++, mon_read_byte(adr++));
475	else {
476	dest += end_adr - adr;
477	for (int i=0; i<num; i++)
478	mon_write_byte(dest--, mon_read_byte(end_adr--));
479	}
480	}
481
482
483	/*
484	* Compare
485	* c start end dest
486	*/
487
488	void compare(void)
489	{
490	uint32 adr, end_adr, dest;
491	int num = 0;
492
493	if (!mon_expression(&adr))
494	return;
495	if (!mon_expression(&end_adr))
496	return;
497	if (!mon_expression(&dest))
498	return;
499	if (mon_token != T_END) {
500	mon_error("Too many arguments");
501	return;
502	}
503
504	while (adr <= end_adr && !mon_aborted()) {
505	if (mon_read_byte(adr) != mon_read_byte(dest)) {
506	fprintf(monout, "%08x ", mon_use_real_mem ? adr : adr % mon_mem_size);
507	num++;
508	if (!(num & 7))
509	fputc('\n', monout);
510	}
511	adr++; dest++;
512	}
513
514	if (num & 7)
515	fputc('\n', monout);
516	fprintf(monout, "%d byte(s) different\n", num);
517	}
518
519
520	/*
521	* Search for byte string
522	* h start end bytestring
523	*/
524
525	void hunt(void)
526	{
527	uint32 adr, end_adr, len;
528	uint8 str[256];
529	int num = 0;
530
531	if (!mon_expression(&adr))
532	return;
533	if (!mon_expression(&end_adr))
534	return;
535	if (!byte_string(str, len))
536	return;
537
538	while ((adr+len-1) <= end_adr && !mon_aborted()) {
539	uint32 i;
540
541	for (i=0; i<len; i++)
542	if (mon_read_byte(adr + i) != str[i])
543	break;
544
545	if (i == len) {
546	fprintf(monout, "%08x ", mon_use_real_mem ? adr : adr % mon_mem_size);
547	num++;
548	if (num == 1)
549	mon_dot_address = adr;
550	if (!(num & 7))
551	fputc('\n', monout);
552	}
553	adr++;
554	}
555
556	if (num & 7)
557	fputc('\n', monout);
558	fprintf(monout, "Found %d occurrences\n", num);
559	}
560
561
562	/*
563	* Load data
564	* [ start "file"
565	*/
566
567	void load_data(void)
568	{
569	uint32 start_adr;
570	FILE *file;
571	int fc;
572
573	if (!mon_expression(&start_adr))
574	return;
575	if (mon_token == T_END) {
576	mon_error("Missing file name");
577	return;
578	}
579	if (mon_token != T_STRING) {
580	mon_error("'\"' around file name expected");
581	return;
582	}
583	mon_get_token();
584	if (mon_token != T_END) {
585	mon_error("Too many arguments");
586	return;
587	}
588
589	if (!(file = fopen(mon_string, "rb")))
590	mon_error("Unable to open file");
591	else {
592	uint32 adr = start_adr;
593
594	while ((fc = fgetc(file)) != EOF)
595	mon_write_byte(adr++, fc);
596	fclose(file);
597
598	fprintf(monerr, "%08x bytes read from %08x to %08x\n", adr - start_adr, mon_use_real_mem ? start_adr : start_adr % mon_mem_size, mon_use_real_mem ? adr-1 : (adr-1) % mon_mem_size);
599	mon_dot_address = adr;
600	}
601	}
602
603
604	/*
605	* Save data
606	* ] start size "file"
607	*/
608
609	void save_data(void)
610	{
611	uint32 start_adr, size;
612	FILE *file;
613
614	if (!mon_expression(&start_adr))
615	return;
616	if (!mon_expression(&size))
617	return;
618	if (mon_token == T_END) {
619	mon_error("Missing file name");
620	return;
621	}
622	if (mon_token != T_STRING) {
623	mon_error("'\"' around file name expected");
624	return;
625	}
626	mon_get_token();
627	if (mon_token != T_END) {
628	mon_error("Too many arguments");
629	return;
630	}
631
632	if (!(file = fopen(mon_string, "wb")))
633	mon_error("Unable to create file");
634	else {
635	uint32 adr = start_adr, end_adr = start_adr + size - 1;
636
637	while (adr <= end_adr)
638	fputc(mon_read_byte(adr++), file);
639	fclose(file);
640
641	fprintf(monerr, "%08x bytes written from %08x to %08x\n", size, mon_use_real_mem ? start_adr : start_adr % mon_mem_size, mon_use_real_mem ? end_adr : end_adr % mon_mem_size);
642	}
643	}