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commands.go
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commands.go
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// This file is part of Gopher2600.
//
// Gopher2600 is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Gopher2600 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Gopher2600. If not, see <https://www.gnu.org/licenses/>.
package debugger
import (
"encoding/hex"
"fmt"
"runtime"
"sort"
"strconv"
"strings"
"github.com/jetsetilly/gopher2600/cartridgeloader"
"github.com/jetsetilly/gopher2600/coprocessor/developer"
"github.com/jetsetilly/gopher2600/debugger/dbgmem"
"github.com/jetsetilly/gopher2600/debugger/govern"
"github.com/jetsetilly/gopher2600/debugger/script"
"github.com/jetsetilly/gopher2600/debugger/terminal"
"github.com/jetsetilly/gopher2600/debugger/terminal/commandline"
"github.com/jetsetilly/gopher2600/disassembly"
"github.com/jetsetilly/gopher2600/disassembly/symbols"
"github.com/jetsetilly/gopher2600/gui"
"github.com/jetsetilly/gopher2600/hardware/cpu/registers"
"github.com/jetsetilly/gopher2600/hardware/memory/cartridge/plusrom"
"github.com/jetsetilly/gopher2600/hardware/memory/memorymap"
"github.com/jetsetilly/gopher2600/hardware/peripherals/atarivox"
"github.com/jetsetilly/gopher2600/hardware/peripherals/controllers"
"github.com/jetsetilly/gopher2600/hardware/peripherals/savekey"
"github.com/jetsetilly/gopher2600/hardware/riot/ports"
"github.com/jetsetilly/gopher2600/hardware/riot/ports/plugging"
"github.com/jetsetilly/gopher2600/hardware/television"
"github.com/jetsetilly/gopher2600/hardware/television/coords"
"github.com/jetsetilly/gopher2600/logger"
"github.com/jetsetilly/gopher2600/patch"
)
var debuggerCommands *commandline.Commands
var scriptUnsafeCommands *commandline.Commands
// this init() function "compiles" the commandTemplate above into a more
// usuable form. It will cause the program to fail if the template is invalid.
func init() {
var err error
// parse command template
debuggerCommands, err = commandline.ParseCommandTemplate(commandTemplate)
if err != nil {
panic(err)
}
err = debuggerCommands.AddHelp(cmdHelp, helps)
if err != nil {
panic(err)
}
sort.Stable(debuggerCommands)
scriptUnsafeCommands, err = commandline.ParseCommandTemplate(scriptUnsafeTemplate)
if err != nil {
panic(err)
}
sort.Stable(scriptUnsafeCommands)
}
// parseCommand tokenises the input and processes the tokens.
func (dbg *Debugger) parseCommand(cmd string, scribe bool, echo bool) error {
tokens, err := dbg.tokeniseCommand(cmd, scribe, echo)
if err != nil {
return err
}
return dbg.processTokens(tokens)
}
// return tokenised command.
func (dbg *Debugger) tokeniseCommand(cmd string, scribe bool, echo bool) (*commandline.Tokens, error) {
// tokenise input
tokens := commandline.TokeniseInput(cmd)
// if there are no tokens in the input then continue with a default action
if tokens.Remaining() == 0 {
return dbg.tokeniseCommand("STEP", true, false)
}
// check validity of tokenised input
err := debuggerCommands.ValidateTokens(tokens)
if err != nil {
return nil, err
}
// print normalised input if this is command from an interactive source
// and not an auto-command
if echo {
dbg.printLine(terminal.StyleEcho, tokens.String())
}
// test to see if command is allowed when recording/playing a script
if dbg.scriptScribe.IsActive() && scribe {
tokens.Reset()
err := scriptUnsafeCommands.ValidateTokens(tokens)
// fail when the tokens DO match the scriptUnsafe template (ie. when
// there is no err from the validate function)
if err == nil {
return nil, fmt.Errorf("'%s' is unsafe to use in scripts", tokens.String())
}
// record command if it auto is false (is not a result of an "auto" command
// eg. ONHALT). if there's an error then the script will be rolled back and
// the write removed.
dbg.scriptScribe.WriteInput(tokens.String())
}
return tokens, nil
}
// processTokensList call processTokens for each entry in the array of tokens.
// this is useful when we have already parsed and tokenised command input and
// simply want to rerun those commands.
//
// used by the ONSTEP, ONHALT and ONTRACE features.
func (dbg *Debugger) processTokensList(tokenGrp []*commandline.Tokens) error {
var err error
for _, t := range tokenGrp {
err = dbg.processTokens(t)
if err != nil {
return err
}
}
return nil
}
// process a single command (with arguments).
func (dbg *Debugger) processTokens(tokens *commandline.Tokens) error {
// check first token. if this token makes sense then we will consume the
// rest of the tokens appropriately
tokens.Reset()
command, _ := tokens.Get()
switch command {
default:
return fmt.Errorf("%s is not yet implemented", command)
case cmdHelp:
keyword, ok := tokens.Get()
if ok {
dbg.printLine(terminal.StyleHelp, debuggerCommands.Help(keyword))
} else {
dbg.printLine(terminal.StyleHelp, debuggerCommands.HelpOverview())
}
// we don't want the HELP command to appear in the script
dbg.scriptScribe.Rollback()
return nil
case cmdQuit:
if dbg.scriptScribe.IsActive() {
dbg.printLine(terminal.StyleFeedback, "ending script recording")
// we don't want the QUIT command to appear in the script
dbg.scriptScribe.Rollback()
return dbg.scriptScribe.EndSession()
} else {
dbg.running = false
}
case cmdReset:
// resetting in the middle of a CPU instruction requires the input loop
// to be unwound before continuing
dbg.unwindLoop(func() error {
// don't reset breakpoints, etc.
err := dbg.reset(false)
if err != nil {
return err
}
dbg.printLine(terminal.StyleFeedback, "machine reset")
return nil
})
case cmdRun:
dbg.runUntilHalt = true
dbg.continueEmulation = true
return nil
case cmdHalt:
dbg.haltImmediately = true
case cmdStep:
adjAmount := 1
back := false
if tk, ok := tokens.Get(); ok {
switch tk {
case "BACK":
back = true
adjAmount *= -1
case "OVER":
// if next expected opcode is JSR then add a volatile breakpoint to the return address
//
// at the time of writing this comment, if execution is currently in RAM then
// GetEntryByAddress() will return nil. this means that if "JSR" is encounterd during
// that time, the STEP OVER command will not work as expected
e := dbg.Disasm.GetEntryByAddress(dbg.vcs.CPU.PC.Address())
if e != nil && e.Operator == "jsr" {
brk := commandline.TokeniseInput(fmt.Sprintf("%#4x", dbg.vcs.CPU.PC.Address()+3))
dbg.halting.volatileBreakpoints.parseCommand(brk)
// breakpoing will take many cycles to trigger so we need to run the emulation
dbg.runUntilHalt = true
}
default:
tokens.Unget()
}
}
// get mode
mode, _ := tokens.Get()
mode = strings.ToUpper(mode)
if back {
var instruction bool
var adj television.Adj
switch mode {
case "":
// continue with current quantum state
if dbg.stepQuantum == QuantumInstruction {
instruction = true
} else {
adj = television.AdjClock
}
case "INSTRUCTION":
dbg.stepQuantum = QuantumInstruction
instruction = true
case "CLOCK":
dbg.stepQuantum = QuantumClock
adj = television.AdjClock
case "SCANLINE":
adj = television.AdjScanline
case "FRAME":
adj = television.AdjFrame
default:
return fmt.Errorf("unknown STEP BACK mode (%s)", mode)
}
var coords coords.TelevisionCoords
if instruction {
coords = dbg.cpuBoundaryLastInstruction
} else {
coords = dbg.vcs.TV.AdjCoords(adj, adjAmount)
}
dbg.setState(govern.Rewinding)
dbg.unwindLoop(func() error {
// update catchupQuantum before starting rewind process
dbg.catchupQuantum = dbg.stepQuantum
return dbg.Rewind.GotoCoords(coords)
})
return nil
}
// step forward
switch mode {
case "":
// continue with current quantum state
// if quantum is instruction and CPU is not RDY then STEP is best
// implemented as TRAP RDY
if dbg.stepQuantum == QuantumInstruction && !dbg.vcs.CPU.RdyFlg {
_ = dbg.halting.volatileTraps.parseCommand(commandline.TokeniseInput("RDY"))
dbg.runUntilHalt = true
// when the RDY flag changes the input loop will think it's
// inside a video step. we need to force the loop to return
// to the non-video step loop
dbg.stepOutOfVideoStepInputLoop = true
}
case "INSTRUCTION":
dbg.stepQuantum = QuantumInstruction
case "CLOCK":
dbg.stepQuantum = QuantumClock
default:
// do not change quantum
tokens.Unget()
// ignoring error
_ = dbg.halting.volatileTraps.parseCommand(tokens)
// trap may take many cycles to trigger
dbg.runUntilHalt = true
}
// always continue
dbg.continueEmulation = true
case cmdQuantum:
mode, _ := tokens.Get()
mode = strings.ToUpper(mode)
switch mode {
case "INSTRUCTION":
dbg.stepQuantum = QuantumInstruction
case "CLOCK":
dbg.stepQuantum = QuantumClock
default:
dbg.printLine(terminal.StyleFeedback, "set to %s", dbg.stepQuantum)
}
case cmdScript:
option, _ := tokens.Get()
switch strings.ToUpper(option) {
case "RECORD":
var err error
saveFile, _ := tokens.Get()
err = dbg.scriptScribe.StartSession(saveFile)
if err != nil {
return err
}
// we don't want SCRIPT RECORD command to appear in the script
dbg.scriptScribe.Rollback()
return nil
case "END":
// we don't want SCRIPT END command to appear in the script
dbg.scriptScribe.Rollback()
return dbg.scriptScribe.EndSession()
default:
// run a script
scr, err := script.RescribeScript(option)
if err != nil {
return err
}
if dbg.scriptScribe.IsActive() {
// if we're currently recording a script we want to write this
// command to the new script file but indicate that we'll be
// entering a new script and so don't want to repeat the
// commands from that script
err := dbg.scriptScribe.StartPlayback()
if err != nil {
return err
}
defer dbg.scriptScribe.EndPlayback()
}
err = dbg.inputLoop(scr, false)
if err != nil {
return err
}
}
case cmdRewind:
// note that we calling the rewind.GotoFrame() functions directly and not
// using the debugger.PushRewind() function.
arg, ok := tokens.Get()
if ok {
// stop emulation on rewind
dbg.runUntilHalt = false
if arg == "LAST" {
dbg.setState(govern.Rewinding)
dbg.unwindLoop(dbg.Rewind.GotoLast)
} else if arg == "SUMMARY" {
dbg.printLine(terminal.StyleInstrument, dbg.Rewind.Peephole())
} else {
frame, _ := strconv.Atoi(arg)
dbg.setState(govern.Rewinding)
dbg.unwindLoop(func() error {
err := dbg.Rewind.GotoFrame(frame)
if err != nil {
return err
}
return nil
})
}
return nil
}
case cmdComparison:
arg, ok := tokens.Get()
if ok {
switch arg {
case "LOCK":
dbg.Rewind.LockComparison(true)
case "UNLOCK":
dbg.Rewind.LockComparison(false)
if dbg.State() == govern.Running {
dbg.Rewind.UpdateComparison()
}
default:
frame, _ := strconv.Atoi(arg)
dbg.Rewind.SetComparison(frame)
}
}
case cmdGoto:
coords := dbg.vcs.TV.GetCoords()
if s, ok := tokens.Get(); ok {
coords.Clock, _ = strconv.Atoi(s)
if s, ok := tokens.Get(); ok {
coords.Scanline, _ = strconv.Atoi(s)
if s, ok := tokens.Get(); ok {
coords.Frame, _ = strconv.Atoi(s)
}
}
}
dbg.setState(govern.Rewinding)
dbg.unwindLoop(func() error {
err := dbg.Rewind.GotoCoords(coords)
if err != nil {
return err
}
return nil
})
case cmdInsert:
dbg.unwindLoop(func() error {
cart, _ := tokens.Get()
cl, err := cartridgeloader.NewLoader(cart, "AUTO")
if err != nil {
return err
}
err = dbg.attachCartridge(cl)
if err != nil {
return err
}
// use cartridge's idea of the filename. the attach process may have
// caused a different cartridge to load than the one requested (most
// typically this will mean that the cartridge has been ejected)
dbg.printLine(terminal.StyleFeedback, "machine reset with new cartridge (%s)", dbg.vcs.Mem.Cart.Filename)
return nil
})
case cmdCartridge:
arg, ok := tokens.Get()
if ok {
switch arg {
case "PATH":
dbg.printLine(
terminal.StyleInstrument,
dbg.vcs.Mem.Cart.Filename,
)
case "NAME":
dbg.printLine(
terminal.StyleInstrument,
dbg.vcs.Mem.Cart.ShortName,
)
case "MAPPER":
dbg.printLine(
terminal.StyleInstrument,
dbg.vcs.Mem.Cart.ID(),
)
case "CONTAINER":
dbg.printLine(
terminal.StyleInstrument,
dbg.vcs.Mem.Cart.ContainerID(),
)
case "MAPPEDBANKS":
dbg.printLine(
terminal.StyleInstrument,
dbg.vcs.Mem.Cart.MappedBanks(),
)
case "HASH":
dbg.printLine(
terminal.StyleFeedback,
dbg.vcs.Mem.Cart.Hash,
)
case "STATIC":
// !!TODO: poke/peek static cartridge static data areas
if bus := dbg.vcs.Mem.Cart.GetStaticBus(); bus != nil {
static := bus.GetStatic()
if static != nil {
dbg.printLine(terminal.StyleFeedback, "cartridge has a static data area")
} else {
dbg.printLine(terminal.StyleFeedback, "cartridge has no static data area")
}
} else {
dbg.printLine(terminal.StyleFeedback, "cartridge has no static data area")
}
case "REGISTERS":
// !!TODO: poke/peek cartridge registers
if bus := dbg.vcs.Mem.Cart.GetRegistersBus(); bus != nil {
dbg.printLine(terminal.StyleInstrument, bus.GetRegisters().String())
} else {
dbg.printLine(terminal.StyleFeedback, "cartridge has no registers")
}
case "RAM":
// cartridge RAM is accessible through the normal VCS buses so
// the normal peek/poke commands will work
if bus := dbg.vcs.Mem.Cart.GetRAMbus(); bus != nil {
ram := bus.GetRAM()
if ram != nil {
s := &strings.Builder{}
for b := 0; b < len(ram); b++ {
s.WriteString(ram[b].Label + "\n")
s.WriteString(strings.Repeat("-", len(ram[b].Label)))
s.WriteString("\n")
s.WriteString(hex.Dump(ram[b].Data))
s.WriteString("\n\n")
}
dbg.printLine(terminal.StyleInstrument, s.String())
} else {
dbg.printLine(terminal.StyleFeedback, "cartridge has no RAM")
}
} else {
dbg.printLine(terminal.StyleFeedback, "cartridge has no RAM")
}
case "HOTLOAD":
err := dbg.hotload()
if err != nil {
dbg.printLine(terminal.StyleFeedback, err.Error())
} else {
dbg.printLine(terminal.StyleFeedback, "hotload successful")
}
case "DUMP":
romdump, err := dbg.vcs.Mem.Cart.ROMDump()
if err != nil {
dbg.printLine(terminal.StyleFeedback, err.Error())
} else {
dbg.printLine(terminal.StyleFeedback, fmt.Sprintf("rom dumped to %s", romdump))
}
}
} else {
dbg.printLine(terminal.StyleInstrument, dbg.vcs.Mem.Cart.String())
}
case cmdPatch:
f, _ := tokens.Get()
patched, err := patch.CartridgeMemory(dbg.vcs.Mem.Cart, f)
if err != nil {
dbg.printLine(terminal.StyleError, "%v", err)
if patched {
dbg.printLine(terminal.StyleError, "error during patching. cartridge might be unusable.")
}
return nil
}
if patched {
dbg.printLine(terminal.StyleFeedback, "cartridge patched")
}
case cmdDisasm:
bytecode := false
arg, ok := tokens.Get()
if ok {
switch arg {
case "REDUX":
err := dbg.Disasm.FromMemory()
if err != nil {
dbg.printLine(terminal.StyleFeedback, err.Error())
}
return nil
case "BYTECODE":
bytecode = true
}
}
attr := disassembly.ColumnAttr{
ByteCode: bytecode,
Label: true,
Cycles: true,
}
s := strings.Builder{}
err := dbg.Disasm.Write(&s, attr)
if err != nil {
dbg.printLine(terminal.StyleFeedback, err.Error())
}
dbg.printLine(terminal.StyleFeedback, s.String())
case cmdGrep:
scope := disassembly.GrepAll
output := &strings.Builder{}
s, _ := tokens.Get()
switch strings.ToUpper(s) {
case "COPROC":
search, _ := tokens.Get()
addr, err := strconv.ParseUint(search, 0, 32)
if err != nil {
dbg.printLine(terminal.StyleError, "search term for COPROC must be a 32bit address")
return nil
}
var ln *developer.SourceLine
dbg.CoProcDev.BorrowSource(func(src *developer.Source) {
if src == nil {
dbg.printLine(terminal.StyleError, "no source files found")
return
}
var ok bool
ln, ok = src.LinesByAddress[uint64(addr)]
if !ok {
dbg.printLine(terminal.StyleError, fmt.Sprintf("address %x does not correspond to a source line", addr))
} else {
dbg.printLine(terminal.StyleFeedback, ln.String())
}
})
_ = dbg.gui.SetFeature(gui.ReqCoProcSourceLine, ln)
return nil
case "OPERATOR":
scope = disassembly.GrepOperator
case "OPERAND":
scope = disassembly.GrepOperand
default:
tokens.Unget()
}
search, _ := tokens.Get()
err := dbg.Disasm.Grep(output, scope, search, false)
if err != nil {
return err
}
if output.Len() == 0 {
dbg.printLine(terminal.StyleError, "%s not found in disassembly", search)
} else {
dbg.printLine(terminal.StyleFeedback, output.String())
}
case cmdSymbol:
tok, _ := tokens.Get()
switch strings.ToUpper(tok) {
case "LIST":
option, ok := tokens.Get()
if ok {
switch strings.ToUpper(option) {
default:
// already caught by command line ValidateTokens()
case "LABELS":
dbg.dbgmem.Sym.ListLabels(dbg.printStyle(terminal.StyleFeedback))
case "READ":
dbg.dbgmem.Sym.ListReadSymbols(dbg.printStyle(terminal.StyleFeedback))
case "WRITE":
dbg.dbgmem.Sym.ListWriteSymbols(dbg.printStyle(terminal.StyleFeedback))
}
} else {
dbg.dbgmem.Sym.ListSymbols(dbg.printStyle(terminal.StyleFeedback))
}
default:
symbol := tok
symSearch := dbg.Disasm.Sym.SearchBySymbol(symbol, symbols.SearchLabel)
if symSearch != nil {
ai := dbg.dbgmem.GetAddressInfo(symSearch.Address, true)
if ai != nil {
dbg.printLine(terminal.StyleFeedback, "%s [LABEL]", ai.String())
} else {
symSearch = nil
}
}
aiRead := dbg.dbgmem.GetAddressInfo(symbol, true)
if aiRead != nil {
dbg.printLine(terminal.StyleFeedback, "%s [READ]", aiRead.String())
}
aiWrite := dbg.dbgmem.GetAddressInfo(symbol, false)
if aiWrite != nil {
dbg.printLine(terminal.StyleFeedback, "%s [WRITE]", aiWrite.String())
}
if symSearch == nil && aiRead == nil && aiWrite == nil {
dbg.printLine(terminal.StyleFeedback, "%s not found in any symbol table", symbol)
}
}
case cmdOnHalt:
if tokens.Remaining() == 0 {
if len(dbg.commandOnHalt) == 0 {
dbg.printLine(terminal.StyleFeedback, "auto-command on halt: OFF")
} else {
s := strings.Builder{}
for _, c := range dbg.commandOnHalt {
s.WriteString(c.String())
s.WriteString("; ")
}
dbg.printLine(terminal.StyleFeedback, "command on halt: %s", strings.TrimSuffix(s.String(), "; "))
}
return nil
}
var input string
option, _ := tokens.Get()
switch strings.ToUpper(option) {
case "OFF":
dbg.commandOnHalt = dbg.commandOnHalt[:0]
dbg.printLine(terminal.StyleFeedback, "no command on halt")
return nil
case "ON":
dbg.commandOnHalt = dbg.commandOnHaltStored
for _, c := range dbg.commandOnHalt {
dbg.printLine(terminal.StyleFeedback, "auto-command on halt: %s", c)
}
return nil
default:
// token isn't one we recognise so push it back onto the token queue
tokens.Unget()
// use remaininder of command line to form the ONHALT command sequence
input = strings.TrimSpace(tokens.Remainder())
tokens.End()
}
// empty list of tokens. taking note of existing command - not the same
// as commandOnHaltStored because ONHALT might be OFF
existingOnHalt := dbg.commandOnHalt
dbg.commandOnHalt = dbg.commandOnHalt[:0]
// tokenise commands to check for integrity
for _, s := range strings.Split(input, ",") {
toks, err := dbg.tokeniseCommand(s, false, false)
if err != nil {
dbg.commandOnHalt = existingOnHalt
return err
}
dbg.commandOnHalt = append(dbg.commandOnHalt, toks)
}
// make a copy of
dbg.commandOnHaltStored = dbg.commandOnHalt
// display the new ONHALT command(s)
s := strings.Builder{}
for _, c := range dbg.commandOnHalt {
s.WriteString(c.String())
s.WriteString("; ")
}
dbg.printLine(terminal.StyleFeedback, "command on halt: %s", strings.TrimSuffix(s.String(), "; "))
return nil
case cmdOnStep:
if tokens.Remaining() == 0 {
if len(dbg.commandOnStep) == 0 {
dbg.printLine(terminal.StyleFeedback, "no command on step")
} else {
s := strings.Builder{}
for _, c := range dbg.commandOnStep {
s.WriteString(c.String())
s.WriteString("; ")
}
dbg.printLine(terminal.StyleFeedback, "command on step: %s", strings.TrimSuffix(s.String(), "; "))
}
return nil
}
var input string
option, _ := tokens.Get()
switch strings.ToUpper(option) {
case "OFF":
dbg.commandOnStep = dbg.commandOnStep[:0]
dbg.printLine(terminal.StyleFeedback, "auto-command on step: OFF")
return nil
case "ON":
dbg.commandOnStep = dbg.commandOnStepStored
for _, c := range dbg.commandOnStep {
dbg.printLine(terminal.StyleFeedback, "auto-command on step: %s", c)
}
return nil
default:
// token isn't one we recognise so push it back onto the token queue
tokens.Unget()
// use remaininder of command line to form the ONSTEP command sequence
input = strings.TrimSpace(tokens.Remainder())
tokens.End()
}
// empty list of tokens. taking note of existing command - not the same
// as commandOnStepStored because ONSTEP might be OFF
existingOnStep := dbg.commandOnStep
dbg.commandOnStep = dbg.commandOnStep[:0]
// tokenise commands to check for integrity
for _, s := range strings.Split(input, ",") {
toks, err := dbg.tokeniseCommand(s, false, false)
if err != nil {
dbg.commandOnStep = existingOnStep
return err
}
dbg.commandOnStep = append(dbg.commandOnStep, toks)
}
// store new commandOnStep
dbg.commandOnStepStored = dbg.commandOnStep
// display the new ONSTEP command(s)
s := strings.Builder{}
for _, c := range dbg.commandOnStep {
s.WriteString(c.String())
s.WriteString("; ")
}
dbg.printLine(terminal.StyleFeedback, "command on step: %s", strings.TrimSuffix(s.String(), "; "))
return nil
case cmdOnTrace:
if tokens.Remaining() == 0 {
if len(dbg.commandOnTrace) == 0 {
dbg.printLine(terminal.StyleFeedback, "no command on trace")
} else {
s := strings.Builder{}
for _, c := range dbg.commandOnTrace {
s.WriteString(c.String())
s.WriteString("; ")
}
dbg.printLine(terminal.StyleFeedback, "command on trace: %s", strings.TrimSuffix(s.String(), "; "))
}
return nil
}
var input string
option, _ := tokens.Get()
switch strings.ToUpper(option) {
case "OFF":
dbg.commandOnTrace = dbg.commandOnTrace[:0]
dbg.printLine(terminal.StyleFeedback, "auto-command on trace: OFF")
return nil
case "ON":
dbg.commandOnTrace = dbg.commandOnTraceStored
for _, c := range dbg.commandOnTrace {
dbg.printLine(terminal.StyleFeedback, "auto-command on trace: %s", c)
}
return nil
default:
// token isn't one we recognise so push it back onto the token queue
tokens.Unget()
// use remaininder of command line to form the ONTRACE command sequence
input = strings.TrimSpace(tokens.Remainder())
tokens.End()
}
// empty list of tokens. taking note of existing command
existingOnTrace := dbg.commandOnTrace
dbg.commandOnTrace = dbg.commandOnTrace[:0]
// tokenise commands to check for integrity
for _, s := range strings.Split(input, ",") {
toks, err := dbg.tokeniseCommand(s, false, false)
if err != nil {
dbg.commandOnTrace = existingOnTrace
return err
}
dbg.commandOnTrace = append(dbg.commandOnTrace, toks)
}
// store new commandOnTrace
dbg.commandOnTraceStored = dbg.commandOnTrace
// display the new ONTRACE command(s)
s := strings.Builder{}
for _, c := range dbg.commandOnTrace {
s.WriteString(c.String())
s.WriteString("; ")
}
dbg.printLine(terminal.StyleFeedback, "command on trace: %s", strings.TrimSuffix(s.String(), "; "))
return nil
case cmdLast:
if dbg.liveDisasmEntry == nil || dbg.liveDisasmEntry.Result.Defn == nil {
dbg.printLine(terminal.StyleFeedback, "no instruction decoded yet")
return nil
}
// whether to show bytecode
bytecode := false
option, ok := tokens.Get()
if ok {
switch strings.ToUpper(option) {
case "DEFN":
if dbg.vcs.CPU.LastResult.Defn == nil {
dbg.printLine(terminal.StyleFeedback, "no instruction decoded yet")
} else {
dbg.printLine(terminal.StyleFeedback, "%s", dbg.vcs.CPU.LastResult.Defn)
}
return nil
case "BYTECODE":
bytecode = true
}
}
s := strings.Builder{}
if dbg.vcs.Mem.Cart.NumBanks() > 1 {
s.WriteString(fmt.Sprintf("[%s] ", dbg.liveBankInfo))
}
s.WriteString(dbg.liveDisasmEntry.GetField(disassembly.FldAddress))
s.WriteString(" ")
if bytecode {
s.WriteString(dbg.liveDisasmEntry.GetField(disassembly.FldBytecode))
s.WriteString(" ")
}
s.WriteString(dbg.liveDisasmEntry.GetField(disassembly.FldOperator))
s.WriteString(" ")
s.WriteString(dbg.liveDisasmEntry.GetField(disassembly.FldOperand))
s.WriteString(" ")
s.WriteString(dbg.liveDisasmEntry.GetField(disassembly.FldCycles))
s.WriteString(" ")
s.WriteString(dbg.liveDisasmEntry.GetField(disassembly.FldNotes))
// change terminal output style depending on condition of last CPU result
if dbg.liveDisasmEntry.Result.Final {
dbg.printLine(terminal.StyleCPUStep, s.String())
} else {
dbg.printLine(terminal.StyleVideoStep, s.String())
}
case cmdMemMap:
address, ok := tokens.Get()
if ok {
// if an address argument has been specified then map the address
// in a read and write context and display the information
// if hasMapped is false after the read/write mappings then the
// address could no be resolved and we print an appropriate notice
// to the user
hasMapped := false
s := strings.Builder{}
ai := dbg.dbgmem.GetAddressInfo(address, true)
if ai != nil {
hasMapped = true
s.WriteString("Read:\n")
if ai.Address != ai.MappedAddress {
s.WriteString(fmt.Sprintf(" %#04x maps to %#04x ", ai.Address, ai.MappedAddress))
} else {
s.WriteString(fmt.Sprintf(" %#04x ", ai.Address))
}
s.WriteString(fmt.Sprintf("in area %s\n", ai.Area.String()))
if ai.Symbol != "" {
s.WriteString(fmt.Sprintf(" labelled as %s\n", ai.Symbol))
}
}
ai = dbg.dbgmem.GetAddressInfo(address, false)
if ai != nil {
hasMapped = true
s.WriteString("Write:\n")