103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/* $NetBSD: db_memrw.c,v 1.3 2000/06/29 08:13:52 mrg Exp $ */
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/*
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* Mach Operating System
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* Copyright (c) 1992 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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* Interface to the debugger for virtual memory read/write.
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* This is a simple version for kernels with writable text.
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* For an example of read-only kernel text, see the file:
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* sys/arch/sun3/sun3/db_memrw.c
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*
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* ALERT! If you want to access device registers with a
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* specific size, then the read/write functions have to
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* make sure to do the correct sized pointer access.
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <uvm/uvm_extern.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_access.h>
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/*
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* Read bytes from kernel address space for debugger.
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*/
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void
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db_read_bytes(addr, size, data)
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db_addr_t addr;
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register size_t size;
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register char *data;
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{
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register char *src = (char*)addr;
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if (size == 4) {
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*((int*)data) = *((int*)src);
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return;
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}
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if (size == 2) {
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*((short*)data) = *((short*)src);
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return;
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}
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while (size > 0) {
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--size;
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*data++ = *src++;
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}
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}
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/*
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* Write bytes to kernel address space for debugger.
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*/
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void
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db_write_bytes(addr, size, data)
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db_addr_t addr;
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register size_t size;
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register char *data;
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{
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register char *dst = (char *)addr;
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if (size == 4) {
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*((int*)dst) = *((int*)data);
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return;
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}
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if (size == 2) {
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*((short*)dst) = *((short*)data);
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return;
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}
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while (size > 0) {
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--size;
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*dst++ = *data++;
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}
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}
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