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/////////////////////////////////////////////////////////////////////////
// $Id: iodebug.cc,v 1.9 2001/10/03 19:54:29 instinc Exp $
/////////////////////////////////////////////////////////////////////////
//
#include "bochs.h"
bx_iodebug_c bx_iodebug;
bx_iodebug_c *bx_iodebug_ptr;
struct bx_iodebug_s_type {
Boolean enabled;
unsigned int register_select;
Bit32u registers[2];
Bit32u monitored_mem_areas_start[BX_IODEBUG_MAX_AREAS];
Bit32u monitored_mem_areas_end[BX_IODEBUG_MAX_AREAS];
} bx_iodebug_s;
// Constructor
bx_iodebug_c::bx_iodebug_c( void )
{
put("IODEBUG");
settype(IODEBUGLOG);
}
// Destructor
bx_iodebug_c::~bx_iodebug_c( void )
{
}
int bx_iodebug_c::init( bx_devices_c *d )
{
int i;
BX_IODEBUG_THIS devices = d;
BX_IODEBUG_THIS devices->register_io_read_handler(this, read_handler, 0x8A00,"BOCHS IODEBUG");
BX_IODEBUG_THIS devices->register_io_write_handler(this, write_handler, 0x8A00,"BOCHS IODEBUG");
BX_IODEBUG_THIS devices->register_io_write_handler(this, write_handler, 0x8A01,"BOCHS IODEBUG");
// fprintf( stderr, "IODEBUG initialized\n");
bx_iodebug_s.enabled = 0;
bx_iodebug_s.register_select = 0;
for(i=0;i<BX_IODEBUG_MAX_AREAS;i++) {
bx_iodebug_s.monitored_mem_areas_start[i] = 0;
bx_iodebug_s.monitored_mem_areas_end[i] = 0;
}
return(1);
}
Bit32u bx_iodebug_c::read_handler(void *this_ptr, Bit32u addr, unsigned io_len)
{
bx_iodebug_ptr = (bx_iodebug_c *) this_ptr;
return( bx_iodebug_ptr->read(addr, io_len) );
}
Bit32u bx_iodebug_c::read( Bit32u addr, unsigned io_len )
{
if(bx_iodebug_s.enabled) return(0x8A00);
return(0);
}
void bx_iodebug_c::write_handler(void *this_ptr, Bit32u addr, Bit32u dvalue, unsigned io_len)
{
bx_iodebug_c *class_ptr = (bx_iodebug_c *) this_ptr;
class_ptr->write( addr, dvalue, io_len );
}
void bx_iodebug_c::write( Bit32u addr, Bit32u dvalue, unsigned int io_len )
{
// fprintf(stderr, "IODEBUG addr: %4x\tdvalue: %8x\tio_len: %8x\n", (unsigned int)addr, (unsigned int)dvalue, io_len);
if( addr == 0x8A01 && io_len == 2 )
{
bx_iodebug_s.registers[bx_iodebug_s.register_select] =
(bx_iodebug_s.registers[bx_iodebug_s.register_select] << 16) +
(dvalue & 0x0000FFFF );
}
if( (addr != 0x8A00) || (io_len != 2) ) return;
if( !bx_iodebug_s.enabled )
{
if( dvalue == 0x8A00 )
{
bx_iodebug_s.enabled = 1;
// fprintf(stderr, "IODEBUG enabled\n");
bx_iodebug_s.registers[0] = 0;
bx_iodebug_s.registers[1] = 0;
}
return;
}
switch( dvalue )
{
case( 0x8A01 ):
bx_iodebug_s.register_select = 0;
// fprintf( stderr, "IODEBUG register 0 selected\n");
break;
case( 0x8A02 ):
bx_iodebug_s.register_select = 1;
// fprintf( stderr, "IODEBUG register 1 selected\n");
break;
case( 0x8A80 ):
bx_iodebug_s.register_select = 0;
bx_iodebug_c::add_range(
bx_iodebug_s.registers[0],
bx_iodebug_s.registers[1]);
bx_iodebug_s.registers[0] = 0;
bx_iodebug_s.registers[1] = 0;
break;
#if BX_DEBUGGER
case( 0x8AE0 ):
fprintf( stderr, "request return to dbg prompt received, 0x8AE0 command (iodebug)\n");
bx_guard.interrupt_requested=1;
break;
case( 0x8AE2):
fprintf( stderr, "request made by the guest os to disable tracing, iodebug port 0x8A00->0x8AE2\n");
BX_CPU(dbg_cpu)->trace = 0;
break;
case( 0x8AE3 ):
fprintf( stderr, "request made by the guest os to enable tracing, iodebug port 0x8A00->0x8AE3\n");
BX_CPU(dbg_cpu)->trace = 1;
break;
case( 0x8AE4 ):
fprintf( stderr, "request made by the guest os to disable register tracing, iodebug port 0x8A00->0x8AE4\n");
BX_CPU(dbg_cpu)->trace_reg = 0;
break;
case( 0x8AE5 ):
fprintf( stderr, "request made by the guest os to enable register tracing, iodebug port 0x8A00->0x8AE5\n");
BX_CPU(dbg_cpu)->trace_reg = 1;
break;
#endif
case( 0x8AFF ):
bx_iodebug_s.enabled = 0;
// fprintf( stderr, "IODEBUG device deactivated\n");
// break;
// default:
// fprintf(stderr,"IODEBUG unsupported register code\n");
}
}
// Static function
void bx_iodebug_c::mem_write( BX_CPU_C *cpu, Bit32u addr, unsigned len, void *data)
{
Bit32u data32;
Bit16u data16;
Bit8u data8;
unsigned int area;
if( !bx_iodebug_s.enabled ) return;
area = bx_iodebug_c::range_test( addr, len );
// Device is enabled, testing address ranges
if( area )
{
area--;
#if BX_DEBUGGER
fprintf( stdout, "%s @ eip: %08X wrote at monitored memory location %8X\n", cpu->name, cpu->eip, addr);
bx_guard.interrupt_requested=1;
#else
fprintf( stderr,
"IODEBUG write to monitored memory area: %2i\tby EIP:\t\t%08X\n\trange start: \t\t%08X\trange end:\t%08X\n\taddress accessed:\t%08X\tdata written:\t",
area,
cpu->eip,
bx_iodebug_s.monitored_mem_areas_start[area],
bx_iodebug_s.monitored_mem_areas_end[area],
(unsigned int)addr);
data32 = * (Bit32u *)data;
data16 = (Bit16u)data32;
data8 = (Bit8u)data32;
switch(len)
{
case(1):
fprintf(stderr,"%02X\n", (unsigned int)data8);
break;
case(2):
fprintf(stderr,"%04X\n", (unsigned int)data16);
break;
case(4):
fprintf(stderr,"%08X\n", (unsigned int)data32);
break;
default:
fprintf(stderr, "unsupported write size\n");
}
#endif
}
}
void bx_iodebug_c::mem_read( BX_CPU_C *cpu, Bit32u addr, unsigned len, void *data)
{
Bit32u data32;
Bit16u data16;
Bit8u data8;
unsigned int area;
if( !bx_iodebug_s.enabled ) return;
area = bx_iodebug_c::range_test( addr, len );
// Device is enabled, testing address ranges
if( area )
{
area--;
#if BX_DEBUGGER
fprintf( stdout, "%s @ eip: %8X wrote at monitored memory location %8X\n", cpu->name, cpu->eip, addr);
bx_guard.interrupt_requested=1;
#else
fprintf( stderr,
"IODEBUG read to monitored memory area: %2i\tby EIP:\t\t%08X\n\trange start: \t\t%08X\trange end:\t%08X\n\taddress accessed:\t%08X\tdata written:\t",
area,
cpu->eip,
bx_iodebug_s.monitored_mem_areas_start[area],
bx_iodebug_s.monitored_mem_areas_end[area],
(unsigned int)addr);
data32 = * (Bit32u *)data;
data16 = (Bit16u)data32;
data8 = (Bit8u)data32;
switch(len)
{
case(1):
fprintf(stderr,"%02X\n", (unsigned int)data8);
break;
case(2):
fprintf(stderr,"%04X\n", (unsigned int)data16);
break;
case(4):
fprintf(stderr,"%08X\n", (unsigned int)data32);
break;
default:
fprintf(stderr, "unsupported write size\n");
}
#endif
}
}
unsigned int bx_iodebug_c::range_test( Bit32u addr, unsigned int len )
{
unsigned int i;
for(i=0;i<BX_IODEBUG_MAX_AREAS;i++)
{
if( (bx_iodebug_s.monitored_mem_areas_start[i]!=0) ||
(bx_iodebug_s.monitored_mem_areas_end[i]!=0) )
{
if( (Bit32u)(addr+len-1) < bx_iodebug_s.monitored_mem_areas_start[i] )
continue;
if( addr < bx_iodebug_s.monitored_mem_areas_end[i] )
{
return(++i);
}
}
}
return(0);
}
void bx_iodebug_c::add_range( Bit32u addr_start, Bit32u addr_end )
{
unsigned int i;
for(i=0;i<BX_IODEBUG_MAX_AREAS;i++)
{
if( !bx_iodebug_s.monitored_mem_areas_start[i] &&
!bx_iodebug_s.monitored_mem_areas_end[i] )
{
bx_iodebug_s.monitored_mem_areas_start[i] = addr_start;
bx_iodebug_s.monitored_mem_areas_end[i] = addr_end;
// fprintf(stderr, "IODEBUG added range successfully in slot: %i\n",i);
return;
}
}
// fprintf(stderr, "IODEBUG unable to register memory range, all slots taken\n");
}
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