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/////////////////////////////////////////////////////////////////////////
// $Id: iodebug.cc,v 1.21 2006/03/06 22:03:16 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
#include "bochs.h"
#include "cpu/cpu.h"
#include "iodev.h"
#if BX_SUPPORT_IODEBUG
#define BX_IODEBUG_THIS this->
bx_iodebug_c bx_iodebug;
struct bx_iodebug_s_type {
bx_bool enabled;
unsigned 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;
bx_iodebug_c::bx_iodebug_c()
{
put("IODEBUG");
settype(IODEBUGLOG);
}
void bx_iodebug_c::init(void)
{
DEV_register_ioread_handler(this, read_handler, 0x8A00,"BOCHS IODEBUG", 7);
DEV_register_iowrite_handler(this, write_handler, 0x8A00,"BOCHS IODEBUG", 7);
DEV_register_iowrite_handler(this, write_handler, 0x8A01,"BOCHS IODEBUG", 7);
bx_iodebug_s.enabled = 0;
bx_iodebug_s.register_select = 0;
for(int 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;
}
}
Bit32u bx_iodebug_c::read_handler(void *this_ptr, Bit32u addr, unsigned io_len)
{
bx_iodebug_c *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 *bx_iodebug_ptr = (bx_iodebug_c *) this_ptr;
bx_iodebug_ptr->write(addr, dvalue, io_len);
}
void bx_iodebug_c::write(Bit32u addr, Bit32u dvalue, unsigned io_len)
{
// fprintf(stderr, "IODEBUG addr: %4x\tdvalue: %8x\tio_len: %8x\n", (unsigned) addr, (unsigned) 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 & 0xFFFF);
}
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)
{
if(! bx_iodebug_s.enabled) return;
unsigned area = bx_iodebug_c::range_test(addr, len);
// Device is enabled, testing address ranges
if(area)
{
area--;
#if BX_DEBUGGER
if (cpu != NULL)
fprintf(stdout, "IODEBUG %s @ eip: " FMT_ADDRX " write at monitored memory location %8X\n", cpu->name, cpu->get_ip(), addr);
else
fprintf(stdout, "IODEBUG write at monitored memory location %8X\n", addr);
bx_guard.interrupt_requested=1;
#else
fprintf(stderr, "IODEBUG write to monitored memory area: %2i\t", area);
if (cpu != NULL)
fprintf(stderr, "by EIP:\t\t" FMT_ADDRX "\n\t", cpu->get_ip());
else
fprintf(stderr, "(device origin)\t", cpu->get_ip());
fprintf(stderr, "range start: \t\t%08X\trange end:\t%08X\n\taddress accessed:\t%08X\tdata written:\t",
bx_iodebug_s.monitored_mem_areas_start[area],
bx_iodebug_s.monitored_mem_areas_end[area],
(unsigned) addr);
switch(len)
{
case 1: {
Bit8u data8 = * ((Bit8u *) data);
fprintf(stderr,"%02X\n", (unsigned) data8);
break;
}
case 2: {
Bit16u data16 = * ((Bit16u *) data);
fprintf(stderr,"%04X\n", (unsigned) data16);
break;
}
case 4: {
Bit32u data32 = * ((Bit32u *) data);
fprintf(stderr,"%08X\n", (unsigned) data32);
break;
}
case 8: {
Bit64u data64 = * ((Bit64u *) data);
fprintf(stderr,"%08X%08x\n",
(unsigned) (data64 >> 32),
(unsigned) (data64 & 0xffffffff));
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)
{
if(! bx_iodebug_s.enabled) return;
unsigned area = bx_iodebug_c::range_test(addr, len);
// Device is enabled, testing address ranges
if(area)
{
area--;
#if BX_DEBUGGER
if (cpu != NULL)
fprintf(stdout, "IODEBUG %s @ eip: " FMT_ADDRX " read at monitored memory location %8X\n", cpu->name, cpu->get_ip(), addr);
else
fprintf(stdout, "IODEBUG read at monitored memory location %8X\n", addr);
bx_guard.interrupt_requested=1;
#else
fprintf(stderr, "IODEBUG read at monitored memory area: %2i\t", area);
if (cpu != NULL)
fprintf(stderr, "by EIP:\t\t" FMT_ADDRX "\n\t", cpu->get_ip());
else
fprintf(stderr, "(device origin)\t", cpu->get_ip());
fprintf(stderr, "range start: \t\t%08X\trange end:\t%08X\n\taddress accessed:\t%08X\tdata written:\t",
bx_iodebug_s.monitored_mem_areas_start[area],
bx_iodebug_s.monitored_mem_areas_end[area],
(unsigned) addr);
switch(len)
{
case 1: {
Bit8u data8 = * ((Bit8u *) data);
fprintf(stderr,"%02X\n", (unsigned) data8);
break;
}
case 2: {
Bit16u data16 = * ((Bit16u *) data);
fprintf(stderr,"%04X\n", (unsigned) data16);
break;
}
case 4: {
Bit32u data32 = * ((Bit32u *) data);
fprintf(stderr,"%08X\n", (unsigned) data32);
break;
}
case 8: {
Bit64u data64 = * ((Bit64u *) data);
fprintf(stderr,"%08X%08x\n",
(unsigned) (data64 >> 32),
(unsigned) (data64 & 0xffffffff));
break;
}
default:
fprintf(stderr, "unsupported read size\n");
}
#endif
}
}
unsigned bx_iodebug_c::range_test(Bit32u addr, unsigned len)
{
for(unsigned 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)
{
for(unsigned 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");
}
#endif /* if BX_SUPPORT_IODEBUG */
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