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debugger / macsbug names

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This commit is contained in:
Kelvin Sherlock 2013-07-05 13:54:44 -04:00
parent 0a729dcacf
commit 5d87528367
1 changed files with 58 additions and 11 deletions
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69
bin/debugger.cpp
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@ -125,6 +125,45 @@ namespace {
std::printf("\n");
}
void printMacsbug(uint32_t pc, uint32_t opcode)
{
unsigned mboffset;
switch(opcode)
{
case 0x4E75: // rts
case 0x4ED0: // jmp (a0)
mboffset = 2;
break;
case 0x4E74: // rtd #
mboffset = 4;
break;
default:
return;
break;
}
pc += mboffset;
// check for MacsBug name after rts.
std::string s;
unsigned b = debuggerReadByte(pc);
if (b > 0x80 && b < 0xa0)
{
b -= 0x80;
pc++;
s.reserve(b);
for (unsigned i = 0; i < b; ++i)
{
s.push_back(debuggerReadByte(pc++));
}
printf("%s\n", s.c_str());
}
}
uint32_t disasm(uint32_t pc, uint16_t *op = nullptr)
{
@ -162,10 +201,12 @@ namespace {
for (unsigned j = 0; j < 4; ++j) strings[j][0] = 0;
pc = cpuDisOpcode(pc, strings[0], strings[1], strings[2], strings[3]);
uint32_t newpc = cpuDisOpcode(pc, strings[0], strings[1], strings[2], strings[3]);
printf("%s %-10s %-40s ; %s\n", strings[0], strings[2], strings[3], strings[1]);
return pc;
printMacsbug(pc, opcode);
return newpc;
}
@ -181,6 +222,8 @@ namespace {
if (trace) disasm(pc, &op);
else op = debuggerReadWord(pc);
if (Flags.traceMacsbug && !trace)
printMacsbug(pc, op);
// will this also be set by an interrupt?
if (cpuGetStop())
@ -284,17 +327,17 @@ void DebugDump(const Command &cmd)
{
// TODO -- if no address, use previous address.
// TODO -- support range?
if (cmd.argc == 1)
{
uint32_t start = cmd.argv[0];
if (start >= Flags.memorySize) return;
uint32_t end = std::min(start + 512, Flags.memorySize);
ssize_t size = end - start;
hexdump(Flags.memory + start, size, start);
uint32_t start = cmd.argv[0];
uint32_t end = cmd.argc == 2 ? cmd.argv[1] : start + 256;
}
if (start >= Flags.memorySize) return;
end = std::min(end, Flags.memorySize);
ssize_t size = end - start;
hexdump(Flags.memory + start, size, start);
}
@ -504,8 +547,9 @@ void DebugSetXRegister(Command &cmd)
}
// todo -- add sigint trap. it shall set a flag to break.
// TODO -- RUN command - reload, re-initialize, re-execute
// TODO -- parser calls commands directly (except trace/step/run/etc)
void DebugShell()
{
char *cp;
@ -538,6 +582,9 @@ void DebugShell()
{
switch(cmd.action)
{
case NullCommand:
break;
case Print:
DebugPrint(cmd);
break;