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+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+/*
+ * HISTORY
+ * $Log: db_examine.c,v $
+ * Revision 1.1 1992/03/25 21:45:07 pace
+ * Initial revision
+ *
+ * Revision 2.4 91/02/05 17:06:20 mrt
+ * Changed to new Mach copyright
+ * [91/01/31 16:17:37 mrt]
+ *
+ * Revision 2.3 90/11/07 16:49:23 rpd
+ * Added db_search_cmd, db_search.
+ * [90/11/06 rpd]
+ *
+ * Revision 2.2 90/08/27 21:50:38 dbg
+ * Add 'r', 'z' to print and examine formats.
+ * Change calling sequence of db_disasm.
+ * db_examine sets db_prev and db_next instead of explicitly
+ * advancing dot.
+ * [90/08/20 dbg]
+ * Reflected changes in db_printsym()'s calling seq.
+ * [90/08/20 af]
+ * Reduce lint.
+ * [90/08/07 dbg]
+ * Created.
+ * [90/07/25 dbg]
+ *
+ */
+/*
+ * Author: David B. Golub, Carnegie Mellon University
+ * Date: 7/90
+ */
+#include "param.h"
+#include "proc.h"
+#include <machine/db_machdep.h> /* type definitions */
+
+#include <ddb/db_lex.h>
+#include <ddb/db_output.h>
+#include <ddb/db_command.h>
+#include <ddb/db_sym.h>
+
+char db_examine_format[TOK_STRING_SIZE] = "x";
+
+extern db_addr_t db_disasm(/* db_addr_t, boolean_t */);
+ /* instruction disassembler */
+
+/*
+ * Examine (print) data.
+ */
+/*ARGSUSED*/
+void
+db_examine_cmd(addr, have_addr, count, modif)
+ db_expr_t addr;
+ int have_addr;
+ db_expr_t count;
+ char * modif;
+{
+ if (modif[0] != '\0')
+ db_strcpy(db_examine_format, modif);
+
+ if (count == -1)
+ count = 1;
+
+ db_examine((db_addr_t) addr, db_examine_format, count);
+}
+
+db_examine(addr, fmt, count)
+ register
+ db_addr_t addr;
+ char * fmt; /* format string */
+ int count; /* repeat count */
+{
+ int c;
+ db_expr_t value;
+ int size;
+ int width;
+ char * fp;
+
+ while (--count >= 0) {
+ fp = fmt;
+ size = 4;
+ width = 16;
+ while ((c = *fp++) != 0) {
+ switch (c) {
+ case 'b':
+ size = 1;
+ width = 4;
+ break;
+ case 'h':
+ size = 2;
+ width = 8;
+ break;
+ case 'l':
+ size = 4;
+ width = 16;
+ break;
+ case 'a': /* address */
+ /* always forces a new line */
+ if (db_print_position() != 0)
+ db_printf("\n");
+ db_prev = addr;
+ db_printsym(addr, DB_STGY_ANY);
+ db_printf(":\t");
+ break;
+ default:
+ if (db_print_position() == 0) {
+ /* If we hit a new symbol, print it */
+ char * name;
+ db_expr_t off;
+
+ db_find_sym_and_offset(addr, &name, &off);
+ if (off == 0)
+ db_printf("%s:\t", name);
+ else
+ db_printf("\t\t");
+
+ db_prev = addr;
+ }
+
+ switch (c) {
+ case 'r': /* signed, current radix */
+ value = db_get_value(addr, size, TRUE);
+ addr += size;
+ db_printf("%-*r", width, value);
+ break;
+ case 'x': /* unsigned hex */
+ value = db_get_value(addr, size, FALSE);
+ addr += size;
+ db_printf("%-*x", width, value);
+ break;
+ case 'z': /* signed hex */
+ value = db_get_value(addr, size, TRUE);
+ addr += size;
+ db_printf("%-*z", width, value);
+ break;
+ case 'd': /* signed decimal */
+ value = db_get_value(addr, size, TRUE);
+ addr += size;
+ db_printf("%-*d", width, value);
+ break;
+ case 'u': /* unsigned decimal */
+ value = db_get_value(addr, size, FALSE);
+ addr += size;
+ db_printf("%-*u", width, value);
+ break;
+ case 'o': /* unsigned octal */
+ value = db_get_value(addr, size, FALSE);
+ addr += size;
+ db_printf("%-*o", width, value);
+ break;
+ case 'c': /* character */
+ value = db_get_value(addr, 1, FALSE);
+ addr += 1;
+ if (value >= ' ' && value <= '~')
+ db_printf("%c", value);
+ else
+ db_printf("\\%03o", value);
+ break;
+ case 's': /* null-terminated string */
+ for (;;) {
+ value = db_get_value(addr, 1, FALSE);
+ addr += 1;
+ if (value == 0)
+ break;
+ if (value >= ' ' && value <= '~')
+ db_printf("%c", value);
+ else
+ db_printf("\\%03o", value);
+ }
+ break;
+ case 'i': /* instruction */
+ addr = db_disasm(addr, FALSE);
+ break;
+ case 'I': /* instruction, alternate form */
+ addr = db_disasm(addr, TRUE);
+ break;
+ default:
+ break;
+ }
+ if (db_print_position() != 0)
+ db_end_line();
+ break;
+ }
+ }
+ }
+ db_next = addr;
+}
+
+/*
+ * Print value.
+ */
+char db_print_format = 'x';
+
+/*ARGSUSED*/
+void
+db_print_cmd(addr, have_addr, count, modif)
+ db_expr_t addr;
+ int have_addr;
+ db_expr_t count;
+ char * modif;
+{
+ db_expr_t value;
+
+ if (modif[0] != '\0')
+ db_print_format = modif[0];
+
+ switch (db_print_format) {
+ case 'a':
+ db_printsym((db_addr_t)addr, DB_STGY_ANY);
+ break;
+ case 'r':
+ db_printf("%11r", addr);
+ break;
+ case 'x':
+ db_printf("%8x", addr);
+ break;
+ case 'z':
+ db_printf("%8z", addr);
+ break;
+ case 'd':
+ db_printf("%11d", addr);
+ break;
+ case 'u':
+ db_printf("%11u", addr);
+ break;
+ case 'o':
+ db_printf("%16o", addr);
+ break;
+ case 'c':
+ value = addr & 0xFF;
+ if (value >= ' ' && value <= '~')
+ db_printf("%c", value);
+ else
+ db_printf("\\%03o", value);
+ break;
+ }
+ db_printf("\n");
+}
+
+db_print_loc_and_inst(loc)
+ db_addr_t loc;
+{
+ db_printsym(loc, DB_STGY_PROC);
+ db_printf(":\t");
+ (void) db_disasm(loc, TRUE);
+}
+
+db_strcpy(dst, src)
+ register char *dst;
+ register char *src;
+{
+ while (*dst++ = *src++)
+ ;
+}
+
+/*
+ * Search for a value in memory.
+ * Syntax: search [/bhl] addr value [mask] [,count]
+ */
+void
+db_search_cmd()
+{
+ int t;
+ db_addr_t addr;
+ int size;
+ db_expr_t value;
+ db_expr_t mask;
+ unsigned int count;
+
+ t = db_read_token();
+ if (t == tSLASH) {
+ t = db_read_token();
+ if (t != tIDENT) {
+ bad_modifier:
+ db_printf("Bad modifier\n");
+ db_flush_lex();
+ return;
+ }
+
+ if (!strcmp(db_tok_string, "b"))
+ size = 1;
+ else if (!strcmp(db_tok_string, "h"))
+ size = 2;
+ else if (!strcmp(db_tok_string, "l"))
+ size = 4;
+ else
+ goto bad_modifier;
+ } else {
+ db_unread_token(t);
+ size = 4;
+ }
+
+ if (!db_expression(&addr)) {
+ db_printf("Address missing\n");
+ db_flush_lex();
+ return;
+ }
+
+ if (!db_expression(&value)) {
+ db_printf("Value missing\n");
+ db_flush_lex();
+ return;
+ }
+
+ if (!db_expression(&mask))
+ mask = 0xffffffff;
+
+ t = db_read_token();
+ if (t == tCOMMA) {
+ if (!db_expression(&count)) {
+ db_printf("Count missing\n");
+ db_flush_lex();
+ return;
+ }
+ } else {
+ db_unread_token(t);
+ count = -1; /* effectively forever */
+ }
+ db_skip_to_eol();
+
+ db_search(addr, size, value, mask, count);
+}
+
+db_search(addr, size, value, mask, count)
+ register
+ db_addr_t addr;
+ int size;
+ db_expr_t value;
+ db_expr_t mask;
+ unsigned int count;
+{
+ while (count-- != 0) {
+ db_prev = addr;
+ if ((db_get_value(addr, size, FALSE) & mask) == value)
+ break;
+ addr += size;
+ }
+ db_next = addr;
+}
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