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https://git.code.sf.net/p/fuse-emulator/fuse
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150 lines
3.2 KiB
C
150 lines
3.2 KiB
C
/* debugger.h: Fuse's monitor/debugger
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Copyright (c) 2002-2004 Philip Kendall
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$Id$
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Author contact information:
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E-mail: pak21-fuse@srcf.ucam.org
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Postal address: 15 Crescent Road, Wokingham, Berks, RG40 2DB, England
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*/
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#include <config.h>
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#include "debugger.h"
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#include "debugger_internals.h"
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#include "event.h"
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#include "memory.h"
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#include "periph.h"
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#include "ui/ui.h"
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#include "z80/z80.h"
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#include "z80/z80_macros.h"
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/* The current activity state of the debugger */
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enum debugger_mode_t debugger_mode;
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/* Which base should we display things in */
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int debugger_output_base;
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int
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debugger_init( void )
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{
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debugger_breakpoints = NULL;
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debugger_output_base = 16;
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return debugger_reset();
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}
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int
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debugger_reset( void )
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{
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debugger_breakpoint_remove_all();
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debugger_mode = DEBUGGER_MODE_INACTIVE;
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return 0;
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}
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int
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debugger_end( void )
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{
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debugger_breakpoint_remove_all();
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return 0;
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}
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/* Activate the debugger */
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int
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debugger_trap( void )
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{
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return ui_debugger_activate();
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}
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/* Step one instruction */
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int
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debugger_step( void )
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{
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debugger_mode = DEBUGGER_MODE_HALTED;
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ui_debugger_deactivate( 0 );
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return 0;
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}
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/* Step to the next instruction, ignoring CALLs etc */
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int
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debugger_next( void )
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{
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size_t length;
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/* Find out how long the current instruction is */
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debugger_disassemble( NULL, 0, &length, PC );
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/* And add a breakpoint after that */
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debugger_breakpoint_add_address( DEBUGGER_BREAKPOINT_TYPE_EXECUTE, -1,
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PC + length, 0,
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DEBUGGER_BREAKPOINT_LIFE_ONESHOT, NULL );
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debugger_run();
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return 0;
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}
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/* Set debugger_mode so that emulation will occur */
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int
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debugger_run( void )
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{
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debugger_mode = debugger_breakpoints ?
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DEBUGGER_MODE_ACTIVE :
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DEBUGGER_MODE_INACTIVE;
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ui_debugger_deactivate( 1 );
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return 0;
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}
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/* Exit from the last CALL etc by setting a oneshot breakpoint at
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(SP) and then starting emulation */
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int
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debugger_breakpoint_exit( void )
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{
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libspectrum_word target;
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target = readbyte_internal( SP ) + 0x100 * readbyte_internal( SP+1 );
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if( debugger_breakpoint_add_address(
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DEBUGGER_BREAKPOINT_TYPE_EXECUTE, -1, target, 0,
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DEBUGGER_BREAKPOINT_LIFE_ONESHOT, NULL
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)
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)
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return 1;
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if( debugger_run() ) return 1;
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return 0;
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}
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/* Poke a value into RAM */
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int
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debugger_poke( libspectrum_word address, libspectrum_byte value )
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{
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writebyte_internal( address, value );
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return 0;
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}
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/* Write a value to a port */
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int
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debugger_port_write( libspectrum_word port, libspectrum_byte value )
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{
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writeport( port, value );
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return 0;
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}
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