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_ppc.h"
#include "mon_68k.h"
#include "mon_x86.h"
#include "mon_6502.h"
#include "mon_8080.h"


/*
 *  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%d.%d\n", MON_VERSION_MAJOR, MON_VERSION_MINOR);
}


/*
 *  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;
}


/*
 *  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
};

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()) {
                                uint16 buf[8];
                                buf[0] = mon_read_half(adr);
                                buf[1] = mon_read_half(adr + 2);
                                buf[2] = mon_read_half(adr + 4);
                                buf[3] = mon_read_half(adr + 6);
                                buf[4] = mon_read_half(adr + 8);
                                buf[5] = mon_read_half(adr + 10);
                                buf[6] = mon_read_half(adr + 12);
                                buf[7] = mon_read_half(adr + 14);
                                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, buf);
                        }
                        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:
                        while (adr <= end_adr && !mon_aborted()) {
                                uint8 buf[16];
                                for (int i=0; i<16; i++)
                                        buf[i] = mon_read_byte(adr + i);
                                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, buf);
                        }
                        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(void)
{
        disassemble(CPU_80x86);
}


/*
 *  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:	1.4
Committed:	1999-10-25T08:04:47Z (24 years, 6 months ago) by cebix
Branch:	MAIN
Changes since 1.3:	+3 -2 lines
Log Message:	- Unix: added mkinstalldirs to "make install" target - user-defined functions for memory access can be supplied
#	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_ppc.h"
28	#include "mon_68k.h"
29	#include "mon_x86.h"
30	#include "mon_6502.h"
31	#include "mon_8080.h"
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%d.%d\n", MON_VERSION_MAJOR, MON_VERSION_MINOR);
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	* Disassemble
268	* d [start [end]]
269	* d65 [start [end]]
270	* d68 [start [end]]
271	* d80 [start [end]]
272	* d86 [start [end]]
273	*/
274
275	enum CPUType {
276	CPU_PPC,
277	CPU_6502,
278	CPU_680x0,
279	CPU_8080,
280	CPU_80x86
281	};
282
283	static void disassemble(CPUType type)
284	{
285	uint32 adr, end_adr;
286
287	if (!range_args(&adr, &end_adr, 16 * 4 - 1)) // 16 lines unless end address specified
288	return;
289
290	switch (type) {
291	case CPU_PPC:
292	while (adr <= end_adr && !mon_aborted()) {
293	uint32 w = mon_read_word(adr);
294	fprintf(monout, "%08x: %08x\t", mon_use_real_mem ? adr : adr % mon_mem_size, w);
295	disass_ppc(monout, mon_use_real_mem ? adr : adr % mon_mem_size, w);
296	adr += 4;
297	}
298	break;
299
300	case CPU_6502:
301	while (adr <= end_adr && !mon_aborted()) {
302	uint8 op = mon_read_byte(adr);
303	uint8 lo = mon_read_byte(adr + 1);
304	uint8 hi = mon_read_byte(adr + 2);
305	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
306	adr += disass_6502(monout, mon_use_real_mem ? adr : adr % mon_mem_size, op, lo, hi);
307	}
308	break;
309
310	case CPU_680x0:
311	while (adr <= end_adr && !mon_aborted()) {
312	uint16 buf[8];
313	buf[0] = mon_read_half(adr);
314	buf[1] = mon_read_half(adr + 2);
315	buf[2] = mon_read_half(adr + 4);
316	buf[3] = mon_read_half(adr + 6);
317	buf[4] = mon_read_half(adr + 8);
318	buf[5] = mon_read_half(adr + 10);
319	buf[6] = mon_read_half(adr + 12);
320	buf[7] = mon_read_half(adr + 14);
321	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
322	adr += disass_68k(monout, mon_use_real_mem ? adr : adr % mon_mem_size, buf);
323	}
324	break;
325
326	case CPU_8080:
327	while (adr <= end_adr && !mon_aborted()) {
328	uint8 op = mon_read_byte(adr);
329	uint8 lo = mon_read_byte(adr + 1);
330	uint8 hi = mon_read_byte(adr + 2);
331	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
332	adr += disass_8080(monout, mon_use_real_mem ? adr : adr % mon_mem_size, op, lo, hi);
333	}
334	break;
335
336	case CPU_80x86:
337	while (adr <= end_adr && !mon_aborted()) {
338	uint8 buf[16];
339	for (int i=0; i<16; i++)
340	buf[i] = mon_read_byte(adr + i);
341	fprintf(monout, "%08x: ", mon_use_real_mem ? adr : adr % mon_mem_size);
342	adr += disass_x86(monout, mon_use_real_mem ? adr : adr % mon_mem_size, buf);
343	}
344	break;
345	}
346
347	mon_dot_address = adr;
348	}
349
350	void disassemble_ppc(void)
351	{
352	disassemble(CPU_PPC);
353	}
354
355	void disassemble_6502(void)
356	{
357	disassemble(CPU_6502);
358	}
359
360	void disassemble_680x0(void)
361	{
362	disassemble(CPU_680x0);
363	}
364
365	void disassemble_8080(void)
366	{
367	disassemble(CPU_8080);
368	}
369
370	void disassemble_80x86(void)
371	{
372	disassemble(CPU_80x86);
373	}
374
375
376	/*
377	* Modify memory
378	* : addr bytestring
379	*/
380
381	void modify(void)
382	{
383	uint32 adr, len, src_adr = 0;
384	uint8 str[256];
385
386	if (!mon_expression(&adr))
387	return;
388	if (!byte_string(str, len))
389	return;
390
391	while (src_adr < len)
392	mon_write_byte(adr++, str[src_adr++]);
393
394	mon_dot_address = adr;
395	}
396
397
398	/*
399	* Fill
400	* f start end bytestring
401	*/
402
403	void fill(void)
404	{
405	uint32 adr, end_adr, len, src_adr = 0;
406	uint8 str[256];
407
408	if (!mon_expression(&adr))
409	return;
410	if (!mon_expression(&end_adr))
411	return;
412	if (!byte_string(str, len))
413	return;
414
415	while (adr <= end_adr)
416	mon_write_byte(adr++, str[src_adr++ % len]);
417	}
418
419
420	/*
421	* Transfer memory
422	* t start end dest
423	*/
424
425	void transfer(void)
426	{
427	uint32 adr, end_adr, dest;
428	int num;
429
430	if (!mon_expression(&adr))
431	return;
432	if (!mon_expression(&end_adr))
433	return;
434	if (!mon_expression(&dest))
435	return;
436	if (mon_token != T_END) {
437	mon_error("Too many arguments");
438	return;
439	}
440
441	num = end_adr - adr + 1;
442
443	if (dest < adr)
444	for (int i=0; i<num; i++)
445	mon_write_byte(dest++, mon_read_byte(adr++));
446	else {
447	dest += end_adr - adr;
448	for (int i=0; i<num; i++)
449	mon_write_byte(dest--, mon_read_byte(end_adr--));
450	}
451	}
452
453
454	/*
455	* Compare
456	* c start end dest
457	*/
458
459	void compare(void)
460	{
461	uint32 adr, end_adr, dest;
462	int num = 0;
463
464	if (!mon_expression(&adr))
465	return;
466	if (!mon_expression(&end_adr))
467	return;
468	if (!mon_expression(&dest))
469	return;
470	if (mon_token != T_END) {
471	mon_error("Too many arguments");
472	return;
473	}
474
475	while (adr <= end_adr && !mon_aborted()) {
476	if (mon_read_byte(adr) != mon_read_byte(dest)) {
477	fprintf(monout, "%08x ", mon_use_real_mem ? adr : adr % mon_mem_size);
478	num++;
479	if (!(num & 7))
480	fputc('\n', monout);
481	}
482	adr++; dest++;
483	}
484
485	if (num & 7)
486	fputc('\n', monout);
487	fprintf(monout, "%d byte(s) different\n", num);
488	}
489
490
491	/*
492	* Search for byte string
493	* h start end bytestring
494	*/
495
496	void hunt(void)
497	{
498	uint32 adr, end_adr, len;
499	uint8 str[256];
500	int num = 0;
501
502	if (!mon_expression(&adr))
503	return;
504	if (!mon_expression(&end_adr))
505	return;
506	if (!byte_string(str, len))
507	return;
508
509	while ((adr+len-1) <= end_adr && !mon_aborted()) {
510	uint32 i;
511
512	for (i=0; i<len; i++)
513	if (mon_read_byte(adr + i) != str[i])
514	break;
515
516	if (i == len) {
517	fprintf(monout, "%08x ", mon_use_real_mem ? adr : adr % mon_mem_size);
518	num++;
519	if (num == 1)
520	mon_dot_address = adr;
521	if (!(num & 7))
522	fputc('\n', monout);
523	}
524	adr++;
525	}
526
527	if (num & 7)
528	fputc('\n', monout);
529	fprintf(monout, "Found %d occurrences\n", num);
530	}
531
532
533	/*
534	* Load data
535	* [ start "file"
536	*/
537
538	void load_data(void)
539	{
540	uint32 start_adr;
541	FILE *file;
542	int fc;
543
544	if (!mon_expression(&start_adr))
545	return;
546	if (mon_token == T_END) {
547	mon_error("Missing file name");
548	return;
549	}
550	if (mon_token != T_STRING) {
551	mon_error("'\"' around file name expected");
552	return;
553	}
554	mon_get_token();
555	if (mon_token != T_END) {
556	mon_error("Too many arguments");
557	return;
558	}
559
560	if (!(file = fopen(mon_string, "rb")))
561	mon_error("Unable to open file");
562	else {
563	uint32 adr = start_adr;
564
565	while ((fc = fgetc(file)) != EOF)
566	mon_write_byte(adr++, fc);
567	fclose(file);
568
569	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);
570	mon_dot_address = adr;
571	}
572	}
573
574
575	/*
576	* Save data
577	* ] start size "file"
578	*/
579
580	void save_data(void)
581	{
582	uint32 start_adr, size;
583	FILE *file;
584
585	if (!mon_expression(&start_adr))
586	return;
587	if (!mon_expression(&size))
588	return;
589	if (mon_token == T_END) {
590	mon_error("Missing file name");
591	return;
592	}
593	if (mon_token != T_STRING) {
594	mon_error("'\"' around file name expected");
595	return;
596	}
597	mon_get_token();
598	if (mon_token != T_END) {
599	mon_error("Too many arguments");
600	return;
601	}
602
603	if (!(file = fopen(mon_string, "wb")))
604	mon_error("Unable to create file");
605	else {
606	uint32 adr = start_adr, end_adr = start_adr + size - 1;
607
608	while (adr <= end_adr)
609	fputc(mon_read_byte(adr++), file);
610	fclose(file);
611
612	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);
613	}
614	}