mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-05 09:14:03 +00:00
388 lines
8.0 KiB
C
388 lines
8.0 KiB
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.
|
|
*/
|
|
/*
|
|
* HISTORY
|
|
* $Log: db_break.c,v $
|
|
* Revision 1.1 1992/03/25 21:44:57 pace
|
|
* Initial revision
|
|
*
|
|
* Revision 2.7 91/02/05 17:06:00 mrt
|
|
* Changed to new Mach copyright
|
|
* [91/01/31 16:17:01 mrt]
|
|
*
|
|
* Revision 2.6 91/01/08 15:09:03 rpd
|
|
* Added db_map_equal, db_map_current, db_map_addr.
|
|
* [90/11/10 rpd]
|
|
*
|
|
* Revision 2.5 90/11/05 14:26:32 rpd
|
|
* Initialize db_breakpoints_inserted to TRUE.
|
|
* [90/11/04 rpd]
|
|
*
|
|
* Revision 2.4 90/10/25 14:43:33 rwd
|
|
* Added map field to breakpoints.
|
|
* Added map argument to db_set_breakpoint, db_delete_breakpoint,
|
|
* db_find_breakpoint. Added db_find_breakpoint_here.
|
|
* [90/10/18 rpd]
|
|
*
|
|
* Revision 2.3 90/09/28 16:57:07 jsb
|
|
* Fixed db_breakpoint_free.
|
|
* [90/09/18 rpd]
|
|
*
|
|
* Revision 2.2 90/08/27 21:49:53 dbg
|
|
* Reflected changes in db_printsym()'s calling seq.
|
|
* [90/08/20 af]
|
|
* Clear breakpoints only if inserted.
|
|
* Reduce lint.
|
|
* [90/08/07 dbg]
|
|
* Created.
|
|
* [90/07/25 dbg]
|
|
*
|
|
*/
|
|
/*
|
|
* Author: David B. Golub, Carnegie Mellon University
|
|
* Date: 7/90
|
|
*/
|
|
/*
|
|
* Breakpoints.
|
|
*/
|
|
#include "param.h"
|
|
#include "proc.h"
|
|
#include <machine/db_machdep.h> /* type definitions */
|
|
|
|
#include <ddb/db_lex.h>
|
|
#include <ddb/db_break.h>
|
|
#include <ddb/db_access.h>
|
|
#include <ddb/db_sym.h>
|
|
#include <ddb/db_break.h>
|
|
|
|
extern boolean_t db_map_equal();
|
|
extern boolean_t db_map_current();
|
|
extern vm_map_t db_map_addr();
|
|
|
|
#define NBREAKPOINTS 100
|
|
struct db_breakpoint db_break_table[NBREAKPOINTS];
|
|
db_breakpoint_t db_next_free_breakpoint = &db_break_table[0];
|
|
db_breakpoint_t db_free_breakpoints = 0;
|
|
db_breakpoint_t db_breakpoint_list = 0;
|
|
|
|
db_breakpoint_t
|
|
db_breakpoint_alloc()
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
|
|
if ((bkpt = db_free_breakpoints) != 0) {
|
|
db_free_breakpoints = bkpt->link;
|
|
return (bkpt);
|
|
}
|
|
if (db_next_free_breakpoint == &db_break_table[NBREAKPOINTS]) {
|
|
db_printf("All breakpoints used.\n");
|
|
return (0);
|
|
}
|
|
bkpt = db_next_free_breakpoint;
|
|
db_next_free_breakpoint++;
|
|
|
|
return (bkpt);
|
|
}
|
|
|
|
void
|
|
db_breakpoint_free(bkpt)
|
|
register db_breakpoint_t bkpt;
|
|
{
|
|
bkpt->link = db_free_breakpoints;
|
|
db_free_breakpoints = bkpt;
|
|
}
|
|
|
|
void
|
|
db_set_breakpoint(map, addr, count)
|
|
vm_map_t map;
|
|
db_addr_t addr;
|
|
int count;
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
|
|
if (db_find_breakpoint(map, addr)) {
|
|
db_printf("Already set.\n");
|
|
return;
|
|
}
|
|
|
|
bkpt = db_breakpoint_alloc();
|
|
if (bkpt == 0) {
|
|
db_printf("Too many breakpoints.\n");
|
|
return;
|
|
}
|
|
|
|
bkpt->map = map;
|
|
bkpt->address = addr;
|
|
bkpt->flags = 0;
|
|
bkpt->init_count = count;
|
|
bkpt->count = count;
|
|
|
|
bkpt->link = db_breakpoint_list;
|
|
db_breakpoint_list = bkpt;
|
|
}
|
|
|
|
void
|
|
db_delete_breakpoint(map, addr)
|
|
vm_map_t map;
|
|
db_addr_t addr;
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
register db_breakpoint_t *prev;
|
|
|
|
for (prev = &db_breakpoint_list;
|
|
(bkpt = *prev) != 0;
|
|
prev = &bkpt->link) {
|
|
if (db_map_equal(bkpt->map, map) &&
|
|
(bkpt->address == addr)) {
|
|
*prev = bkpt->link;
|
|
break;
|
|
}
|
|
}
|
|
if (bkpt == 0) {
|
|
db_printf("Not set.\n");
|
|
return;
|
|
}
|
|
|
|
db_breakpoint_free(bkpt);
|
|
}
|
|
|
|
db_breakpoint_t
|
|
db_find_breakpoint(map, addr)
|
|
vm_map_t map;
|
|
db_addr_t addr;
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
|
|
for (bkpt = db_breakpoint_list;
|
|
bkpt != 0;
|
|
bkpt = bkpt->link)
|
|
{
|
|
if (db_map_equal(bkpt->map, map) &&
|
|
(bkpt->address == addr))
|
|
return (bkpt);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
db_breakpoint_t
|
|
db_find_breakpoint_here(addr)
|
|
db_addr_t addr;
|
|
{
|
|
return db_find_breakpoint(db_map_addr(addr), addr);
|
|
}
|
|
|
|
boolean_t db_breakpoints_inserted = TRUE;
|
|
|
|
void
|
|
db_set_breakpoints()
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
|
|
if (!db_breakpoints_inserted) {
|
|
|
|
for (bkpt = db_breakpoint_list;
|
|
bkpt != 0;
|
|
bkpt = bkpt->link)
|
|
if (db_map_current(bkpt->map)) {
|
|
bkpt->bkpt_inst = db_get_value(bkpt->address,
|
|
BKPT_SIZE,
|
|
FALSE);
|
|
db_put_value(bkpt->address,
|
|
BKPT_SIZE,
|
|
BKPT_SET(bkpt->bkpt_inst));
|
|
}
|
|
db_breakpoints_inserted = TRUE;
|
|
}
|
|
}
|
|
|
|
void
|
|
db_clear_breakpoints()
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
|
|
if (db_breakpoints_inserted) {
|
|
|
|
for (bkpt = db_breakpoint_list;
|
|
bkpt != 0;
|
|
bkpt = bkpt->link)
|
|
if (db_map_current(bkpt->map)) {
|
|
db_put_value(bkpt->address, BKPT_SIZE, bkpt->bkpt_inst);
|
|
}
|
|
db_breakpoints_inserted = FALSE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set a temporary breakpoint.
|
|
* The instruction is changed immediately,
|
|
* so the breakpoint does not have to be on the breakpoint list.
|
|
*/
|
|
db_breakpoint_t
|
|
db_set_temp_breakpoint(addr)
|
|
db_addr_t addr;
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
|
|
bkpt = db_breakpoint_alloc();
|
|
if (bkpt == 0) {
|
|
db_printf("Too many breakpoints.\n");
|
|
return 0;
|
|
}
|
|
|
|
bkpt->map = NULL;
|
|
bkpt->address = addr;
|
|
bkpt->flags = BKPT_TEMP;
|
|
bkpt->init_count = 1;
|
|
bkpt->count = 1;
|
|
|
|
bkpt->bkpt_inst = db_get_value(bkpt->address, BKPT_SIZE, FALSE);
|
|
db_put_value(bkpt->address, BKPT_SIZE, BKPT_SET(bkpt->bkpt_inst));
|
|
return bkpt;
|
|
}
|
|
|
|
void
|
|
db_delete_temp_breakpoint(bkpt)
|
|
db_breakpoint_t bkpt;
|
|
{
|
|
db_put_value(bkpt->address, BKPT_SIZE, bkpt->bkpt_inst);
|
|
db_breakpoint_free(bkpt);
|
|
}
|
|
|
|
/*
|
|
* List breakpoints.
|
|
*/
|
|
void
|
|
db_list_breakpoints()
|
|
{
|
|
register db_breakpoint_t bkpt;
|
|
|
|
if (db_breakpoint_list == 0) {
|
|
db_printf("No breakpoints set\n");
|
|
return;
|
|
}
|
|
|
|
db_printf(" Map Count Address\n");
|
|
for (bkpt = db_breakpoint_list;
|
|
bkpt != 0;
|
|
bkpt = bkpt->link)
|
|
{
|
|
db_printf("%s%8x %5d ",
|
|
db_map_current(bkpt->map) ? "*" : " ",
|
|
bkpt->map, bkpt->init_count);
|
|
db_printsym(bkpt->address, DB_STGY_PROC);
|
|
db_printf("\n");
|
|
}
|
|
}
|
|
|
|
/* Delete breakpoint */
|
|
/*ARGSUSED*/
|
|
void
|
|
db_delete_cmd(addr, have_addr, count, modif)
|
|
db_expr_t addr;
|
|
int have_addr;
|
|
db_expr_t count;
|
|
char * modif;
|
|
{
|
|
db_delete_breakpoint(db_map_addr(addr), (db_addr_t)addr);
|
|
}
|
|
|
|
/* Set breakpoint with skip count */
|
|
/*ARGSUSED*/
|
|
void
|
|
db_breakpoint_cmd(addr, have_addr, count, modif)
|
|
db_expr_t addr;
|
|
int have_addr;
|
|
db_expr_t count;
|
|
char * modif;
|
|
{
|
|
if (count == -1)
|
|
count = 1;
|
|
|
|
db_set_breakpoint(db_map_addr(addr), (db_addr_t)addr, count);
|
|
}
|
|
|
|
/* list breakpoints */
|
|
void
|
|
db_listbreak_cmd()
|
|
{
|
|
db_list_breakpoints();
|
|
}
|
|
|
|
#include <vm/vm_kern.h>
|
|
|
|
/*
|
|
* We want ddb to be usable before most of the kernel has been
|
|
* initialized. In particular, current_thread() or kernel_map
|
|
* (or both) may be null.
|
|
*/
|
|
|
|
boolean_t
|
|
db_map_equal(map1, map2)
|
|
vm_map_t map1, map2;
|
|
{
|
|
return ((map1 == map2) ||
|
|
((map1 == NULL) && (map2 == kernel_map)) ||
|
|
((map1 == kernel_map) && (map2 == NULL)));
|
|
}
|
|
|
|
boolean_t
|
|
db_map_current(map)
|
|
vm_map_t map;
|
|
{
|
|
#if 0
|
|
thread_t thread;
|
|
|
|
return ((map == NULL) ||
|
|
(map == kernel_map) ||
|
|
(((thread = current_thread()) != NULL) &&
|
|
(map == thread->task->map)));
|
|
#else
|
|
return (1);
|
|
#endif
|
|
}
|
|
|
|
vm_map_t
|
|
db_map_addr(addr)
|
|
vm_offset_t addr;
|
|
{
|
|
#if 0
|
|
thread_t thread;
|
|
|
|
/*
|
|
* We want to return kernel_map for all
|
|
* non-user addresses, even when debugging
|
|
* kernel tasks with their own maps.
|
|
*/
|
|
|
|
if ((VM_MIN_ADDRESS <= addr) &&
|
|
(addr < VM_MAX_ADDRESS) &&
|
|
((thread = current_thread()) != NULL))
|
|
return thread->task->map;
|
|
else
|
|
#endif
|
|
return kernel_map;
|
|
}
|