/* $NetBSD: db_examine.c,v 1.7 1994/10/06 05:20:42 mycroft Exp $ */ /* * 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. * * Author: David B. Golub, Carnegie Mellon University * Date: 7/90 */ #include #include #include /* type definitions */ #include #include #include #include char db_examine_format[TOK_STRING_SIZE] = "x"; extern db_addr_t db_disasm(/* db_addr_t, boolean_t */); /* instruction disassembler */ /* * Examine (print) data. Syntax is: * x/[bhl][cdiorsuxz]* * For example, the command: * x/bxxxx * should print: * address: 01 23 45 67 */ /*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; } if (db_print_position() == 0) { /* Always print the address. */ db_printsym(addr, DB_STGY_ANY); db_printf(":\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(); } } 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; }