Return to db_memrw.c CVS log

Up to [local] / sys / arch / m68k / m68k

Annotation of sys/arch/m68k/m68k/db_memrw.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: db_memrw.c,v 1.4 2002/03/14 03:15:54 millert Exp $    */
                      2: /*     $NetBSD: db_memrw.c,v 1.1 1996/02/22 23:23:35 gwr Exp $ */
                      3:
                      4: /*
                      5:  * Mach Operating System
                      6:  * Copyright (c) 1992 Carnegie Mellon University
                      7:  * All Rights Reserved.
                      8:  *
                      9:  * Permission to use, copy, modify and distribute this software and its
                     10:  * documentation is hereby granted, provided that both the copyright
                     11:  * notice and this permission notice appear in all copies of the
                     12:  * software, derivative works or modified versions, and any portions
                     13:  * thereof, and that both notices appear in supporting documentation.
                     14:  *
                     15:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     16:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     17:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     18:  *
                     19:  * Carnegie Mellon requests users of this software to return to
                     20:  *
                     21:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
                     22:  *  School of Computer Science
                     23:  *  Carnegie Mellon University
                     24:  *  Pittsburgh PA 15213-3890
                     25:  *
                     26:  * any improvements or extensions that they make and grant Carnegie Mellon
                     27:  * the rights to redistribute these changes.
                     28:  */
                     29:
                     30: /*
                     31:  * Interface to the debugger for virtual memory read/write.
                     32:  * This is a simple version for kernels with writable text.
                     33:  * For an example of read-only kernel text, see the file:
                     34:  * sys/arch/sun3/sun3/db_memrw.c
                     35:  *
                     36:  * ALERT!  If you want to access device registers with a
                     37:  * specific size, then the read/write functions have to
                     38:  * make sure to do the correct sized pointer access.
                     39:  */
                     40:
                     41: #include <sys/param.h>
                     42: #include <sys/proc.h>
                     43:
                     44: #include <uvm/uvm_extern.h>
                     45:
                     46: #include <machine/db_machdep.h>
                     47:
                     48: #include <ddb/db_access.h>
                     49:
                     50: /*
                     51:  * Read bytes from kernel address space for debugger.
                     52:  */
                     53: void
                     54: db_read_bytes(addr, size, data)
                     55:        db_addr_t       addr;
                     56:        register size_t size;
                     57:        register char   *data;
                     58: {
                     59:        register char   *src = (char *)addr;
                     60:
                     61:        if (size == 4) {
                     62:                *((int *)data) = *((int *)src);
                     63:                return;
                     64:        }
                     65:
                     66:        if (size == 2) {
                     67:                *((short *)data) = *((short *)src);
                     68:                return;
                     69:        }
                     70:
                     71:        while (size > 0) {
                     72:                --size;
                     73:                *data++ = *src++;
                     74:        }
                     75: }
                     76:
                     77: /*
                     78:  * Write bytes to kernel address space for debugger.
                     79:  */
                     80: void
                     81: db_write_bytes(addr, size, data)
                     82:        db_addr_t       addr;
                     83:        register size_t size;
                     84:        register char   *data;
                     85: {
                     86:        register char   *dst = (char *)addr;
                     87:
                     88:        if (size == 4) {
                     89:                *((int *)dst) = *((int *)data);
                     90:                return;
                     91:        }
                     92:
                     93:        if (size == 2) {
                     94:                *((short *)dst) = *((short *)data);
                     95:                return;
                     96:        }
                     97:
                     98:        while (size > 0) {
                     99:                --size;
                    100:                *dst++ = *data++;
                    101:        }
                    102: }
                    103: