Return to db_access.c CVS log | Up to [local] / src / sys / ddb |
File: [local] / src / sys / ddb / db_access.c (download)
Revision 1.7, Sat Jul 19 22:31:14 1997 UTC (26 years, 10 months ago) by niklas
Include vm/vm.h everywhere it is needed to get at boolean_t (I would prefer to have it in sys/types.h but that is problematic). Some KNF. |
/* $OpenBSD: db_access.c,v 1.7 1997/07/19 22:31:14 niklas Exp $ */ /* $NetBSD: db_access.c,v 1.8 1994/10/09 08:37:35 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 * the rights to redistribute these changes. * * Author: David B. Golub, Carnegie Mellon University * Date: 7/90 */ #include <sys/param.h> #include <sys/proc.h> #include <vm/vm.h> #include <machine/db_machdep.h> /* type definitions */ #include <machine/endian.h> #include <ddb/db_access.h> /* * Access unaligned data items on aligned (longword) * boundaries. */ db_expr_t db_get_value(addr, size, is_signed) db_addr_t addr; size_t size; boolean_t is_signed; { char data[sizeof(db_expr_t)]; db_expr_t value, extend; int i; db_read_bytes(addr, size, data); value = 0; extend = (~(db_expr_t)0) << (size * 8 - 1); #if BYTE_ORDER == LITTLE_ENDIAN for (i = size - 1; i >= 0; i--) #else /* BYTE_ORDER == BIG_ENDIAN */ for (i = 0; i < size; i++) #endif /* BYTE_ORDER */ value = (value << 8) + (data[i] & 0xFF); if (size < sizeof(db_expr_t) && is_signed && (value & extend)) value |= extend; return (value); } void db_put_value(addr, size, value) db_addr_t addr; size_t size; db_expr_t value; { char data[sizeof(db_expr_t)]; int i; #if BYTE_ORDER == LITTLE_ENDIAN for (i = 0; i < size; i++) #else /* BYTE_ORDER == BIG_ENDIAN */ for (i = size - 1; i >= 0; i--) #endif /* BYTE_ORDER */ { data[i] = value & 0xff; value >>= 8; } db_write_bytes(addr, size, data); }