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working on disasm

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This commit is contained in:
Zellyn Hunter 2014-08-05 22:17:11 -07:00
parent b78face2fe
commit d42a92879b
1 changed files with 18 additions and 2 deletions
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20
a2/disasm.go
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@ -19,9 +19,13 @@ Disasm is a very simple disassembler for 6502 binary files.
} }
var disasmAddress uint // disasm -a flag var disasmAddress uint // disasm -a flag
var symbolFile string // disasm -s flag
var printLabels bool // disasm -p flag
func init() { func init() {
cmdDisasm.Flag.UintVar(&disasmAddress, "a", 0, "The starting memory address.") cmdDisasm.Flag.UintVar(&disasmAddress, "a", 0, "The starting memory address.")
cmdDisasm.Flag.StringVar(&symbolFile, "s", "", "File of symbol definitions.")
cmdDisasm.Flag.BoolVar(&printLabels, "p", false, "Print labels for symbols.")
} }
func runDisasm(cmd *commander.Command, args []string) error { func runDisasm(cmd *commander.Command, args []string) error {
@ -32,7 +36,7 @@ func runDisasm(cmd *commander.Command, args []string) error {
bytes, err := ioutil.ReadFile(args[0]) bytes, err := ioutil.ReadFile(args[0])
if err != nil { if err != nil {
return nil return err
} }
if len(bytes) > 0x10000 { if len(bytes) > 0x10000 {
return fmt.Errorf("File %s is %04X bytes long, which is more than $10000.", args[0], len(bytes)) return fmt.Errorf("File %s is %04X bytes long, which is more than $10000.", args[0], len(bytes))
@ -42,6 +46,18 @@ func runDisasm(cmd *commander.Command, args []string) error {
disasmAddress, len(bytes), int(disasmAddress)+len(bytes)) disasmAddress, len(bytes), int(disasmAddress)+len(bytes))
} }
asm.DisasmBlock(bytes, uint16(disasmAddress), os.Stdout) var s asm.Symbols
if symbolFile != "" {
s, err = asm.ReadSymbols(symbolFile)
if err != nil {
return err
}
} else {
if printLabels {
return fmt.Errorf("-p (print labels) specified without -s (symbol table file")
}
}
asm.DisasmBlock(bytes, uint16(disasmAddress), os.Stdout, s, 2, printLabels)
return nil return nil
} }