Apple-2-Tools/regs
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supports 32bit labels on pea or ldx/lda pairs

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Sean 2024-06-01 04:29:59 -07:00
parent 4a4702e301
commit 10615526cd
3 changed files with 21 additions and 0 deletions
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18
src/disasm.cc
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@ -74,6 +74,8 @@ std::shared_ptr<Inst> Disassembler::decodeInst(Handle f, Entry *entry) {
uint32_t addr = entry->org;
entry->flags &= IsFlags; // clear changed flags
uint32_t oldFlags = entry->flags;
inst->prevWord = entry->prevWord;
entry->prevWord = 0;
switch (mode) {
case IMP:
inst->operType = Opr::None;
@ -94,6 +96,7 @@ std::shared_ptr<Inst> Disassembler::decodeInst(Handle f, Entry *entry) {
} else {
inst->oper = f->r16();
inst->operType = Opr::Imm16;
entry->prevWord = inst->oper;
}
break;
case IMMX:
@ -103,11 +106,13 @@ std::shared_ptr<Inst> Disassembler::decodeInst(Handle f, Entry *entry) {
} else {
inst->oper = f->r16();
inst->operType = Opr::Imm16;
entry->prevWord = inst->oper;
}
break;
case IMMS:
inst->oper = f->r16();
inst->operType = Opr::Imm16;
entry->prevWord = inst->oper;
break;
case ABS:
inst->oper = f->r16();
@ -267,6 +272,9 @@ std::string Disassembler::printInst(std::shared_ptr<Inst> inst) {
break;
case Opr::Imm16:
args = "#" + hex(inst->oper, 4);
if (inst->prevWord && inst->oper) {
comment = checkDW(inst->oper, inst->prevWord);
}
break;
case Opr::Abs:
args = hex(inst->oper, 6);
@ -377,6 +385,16 @@ std::string Disassembler::lookup(uint16_t val) {
return symbols[addr];
}
std::string Disassembler::checkDW(uint16_t cur, uint16_t prev) {
uint32_t addr = (cur << 16) + prev;
std::string ret = symbols[addr];
if (ret.empty()) {
addr = (prev << 16) + cur;
ret = symbols[addr];
}
return ret;
}
std::string Disassembler::hex(uint32_t val, int width) {
static const char *digits = "0123456789abcdef";
std::string ret;

2
src/disasm.h
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@ -39,6 +39,7 @@ struct Inst {
Opr operType;
uint32_t oper;
uint32_t flags;
uint16_t prevWord;
};
class Disassembler {
@ -54,6 +55,7 @@ class Disassembler {
bool valid(uint32_t address);
std::string hex(uint32_t value, int width);
std::string lookup(uint16_t value);
std::string checkDW(uint16_t val, uint16_t prev);
std::map<uint32_t, std::string> symbols;
std::shared_ptr<Fingerprints> fingerprints;

1
src/map.h
View File

@ -27,6 +27,7 @@ class File {
struct Entry {
uint32_t org;
uint32_t flags;
uint16_t prevWord;
};
class Map {