Current Path : /sys/ddb/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/ddb/db_access.c |
/*- * 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 <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/ddb/db_access.c 153072 2005-12-04 02:12:43Z ru $"); #include <sys/param.h> #include <sys/kdb.h> #include <ddb/ddb.h> #include <ddb/db_access.h> /* * Access unaligned data items on aligned (longword) * boundaries. */ static unsigned db_extend[] = { /* table for sign-extending */ 0, 0xFFFFFF80U, 0xFFFF8000U, 0xFF800000U }; #ifndef BYTE_MSF #define BYTE_MSF 0 #endif db_expr_t db_get_value(addr, size, is_signed) db_addr_t addr; register int size; boolean_t is_signed; { char data[sizeof(u_int64_t)]; register db_expr_t value; register int i; if (db_read_bytes(addr, size, data) != 0) { db_printf("*** error reading from address %llx ***\n", (long long)addr); kdb_reenter(); } value = 0; #if BYTE_MSF for (i = 0; i < size; i++) #else /* BYTE_LSF */ for (i = size - 1; i >= 0; i--) #endif { value = (value << 8) + (data[i] & 0xFF); } if (size < 4) { if (is_signed && (value & db_extend[size]) != 0) value |= db_extend[size]; } return (value); } void db_put_value(addr, size, value) db_addr_t addr; register int size; register db_expr_t value; { char data[sizeof(int)]; register int i; #if BYTE_MSF for (i = size - 1; i >= 0; i--) #else /* BYTE_LSF */ for (i = 0; i < size; i++) #endif { data[i] = value & 0xFF; value >>= 8; } if (db_write_bytes(addr, size, data) != 0) { db_printf("*** error writing to address %llx ***\n", (long long)addr); kdb_reenter(); } }