NetBSD/sys/arch/arm32/kshell/kshell_disassem.c

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/* $NetBSD: kshell_disassem.c,v 1.3 1996/06/03 22:11:34 mark Exp $ */
/*
* Copyright (c) 1994 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RiscBSD kernel project
*
* shell_disassem.c
*
* Debug / Monitor shell disassembler
*
* Created : 09/10/94
*/
/* Include standard header files */
#include <sys/param.h>
#include <sys/systm.h>
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#include <dev/cons.h>
#include <machine/katelib.h>
/* Declare external variables */
/* Local function prototypes */
u_int disassemble __P((u_char *));
u_int do_disassemble __P((u_char *));
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int readhex __P((char *buf));
/* Now for the main code */
/* dis - disassembles memory */
void
shell_disassem(argc, argv)
int argc;
char *argv[];
{
u_char *addr;
if (argc < 2) {
printf("Syntax: dis <addr>\n\r");
return;
}
/* Decode the one argument */
addr = (u_char *)readhex(argv[1]);
printf("Interactive disassembly\n\r");
do_disassemble(addr);
}
u_int
do_disassemble(addr)
u_char *addr;
{
u_int result;
int quit = 0;
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int key = 0;
int count = 1;
do {
result = disassemble(addr);
--count;
if (count == 0) {
count = 1;
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key = cngetc();
switch (key) {
case 'Q' :
case 'q' :
case 0x1b :
case 0x03 :
case 0x04 :
case 0x10b :
quit = 1;
break;
case 0x09 :
case 'r' :
case 'R' :
case 0x103 :
count = 16;
addr += 4;
break;
case 0x102 :
count = 16;
addr -= 124;
break;
case 0x0d :
case 0x101 :
addr = addr + 4;
break;
case 'B' :
case 'b' :
case 0x100:
addr = addr - 4;
break;
case '+' :
case '=' :
case 0x104 :
addr = addr + 0x80;
break;
case '-' :
case '_' :
case 0x105 :
addr = addr - 0x80;
break;
case ' ' :
quit = do_disassemble((u_char *)result);
break;
case 'J' :
case 'j' :
addr = (u_char *)result;
break;
case '/' :
case '?' :
printf("\'\xe3\' - Backwards 1 word\n\r");
printf("\'\xe4\' - Forwards 1 word\n\r");
printf("\'\xe5\' - Backwords 16 words\n\r");
printf("\'\xe6\' - Forwards 16 words\n\r");
printf("\'Q\' - Quit\n\r");
printf("\'B\' - Back a word\n\r");
printf("\'R\' - Disassemble 16 words\n\r");
printf("\'J\' - Jump to address\n\r");
printf("\' \' - Branch to address\n\r");
printf("<BS> - Return from branch\n\r");
printf("\'-\' - Skip backwards 128 words\n\r");
printf("\'+\' - Skip forwards 128 words\n\r");
break;
}
} else {
addr += 4;
}
} while (!quit && key != 0x08);
return(quit);
}
/* End of shell_disassem.c */