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Implement __SCOPE__ (#1845)

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This commit is contained in:
Rangi
2025-10-04 16:41:21 -04:00
committed by GitHub
parent 13e85b5151
commit 7733ccdeb6
3 changed files with 51 additions and 0 deletions
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23
src/asm/symbol.cpp
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@@ -39,6 +39,7 @@ static Symbol const *localScope = nullptr; // Current section's local label sco
static Symbol *PCSymbol;
static Symbol *NARGSymbol;
static Symbol *SCOPESymbol;
static Symbol *globalScopeSymbol;
static Symbol *localScopeSymbol;
static Symbol *RSSymbol;
@@ -67,6 +68,19 @@ static int32_t NARGCallback() {
}
}
static std::shared_ptr<std::string> SCOPECallback() {
if (localScope) {
return std::make_shared<std::string>("..");
} else if (globalScope) {
return std::make_shared<std::string>(".");
} else {
if (!sect_GetSymbolSection()) {
error("`__SCOPE__` has no value outside of a section");
}
return std::make_shared<std::string>("");
}
}
static std::shared_ptr<std::string> globalScopeCallback() {
if (!globalScope) {
error("`.` has no value outside of a label scope");
@@ -296,6 +310,10 @@ Symbol *sym_FindScopedValidSymbol(std::string const &symName) {
if (sym == localScopeSymbol && !localScope) {
return nullptr;
}
// `__SCOPE__` has no value outside of a section
if (sym == SCOPESymbol && !sect_GetSymbolSection()) {
return nullptr;
}
return sym;
}
@@ -683,6 +701,11 @@ void sym_Init(time_t now) {
localScopeSymbol->data = localScopeCallback;
localScopeSymbol->isBuiltin = true;
SCOPESymbol = &createSymbol("__SCOPE__"s);
SCOPESymbol->type = SYM_EQUS;
SCOPESymbol->data = SCOPECallback;
SCOPESymbol->isBuiltin = true;
RSSymbol = sym_AddVar("_RS"s, 0);
RSSymbol->isBuiltin = true;