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Finish the underscore handling in the label localizer

Browse Source 
Correctly handle pre-existing underscores and avoidance of
"reserved" labels.

Also, add more underscores to 2012-label-localizer to exercise
the code.

(issue #16)
This commit is contained in:
Andy McFadden 2018-10-23 20:29:24 -07:00
parent f7e5cf2f45
commit f26a03869a
7 changed files with 97 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
SourceGen/AsmGen/GenAndAsm.cs
View File

@ -211,7 +211,7 @@ namespace SourceGen.AsmGen {
/// </summary>
private void UpdateAssemblerControls() {
bool asmConf = IsAssemblerConfigured();
Debug.WriteLine("ID=" + mSelectedAssemblerId + " asmConf=" + asmConf);
//Debug.WriteLine("ID=" + mSelectedAssemblerId + " asmConf=" + asmConf);
configureAsmLinkLabel.Visible = !asmConf;
if (mGenerationResults == null || !asmConf) {
runAssemblerButton.Enabled = false;

51
SourceGen/AsmGen/LabelLocalizer.cs
View File

@ -167,6 +167,8 @@ namespace SourceGen.AsmGen {
/// Analyzes labels to identify which ones may be treated as non-global.
/// </summary>
public void Analyze() {
Debug.Assert(LocalPrefix.Length > 0);
mGlobalFlags.SetAll(false);
// Currently we only support the "local labels have scope that ends at a global
@ -317,6 +319,8 @@ namespace SourceGen.AsmGen {
///
/// This may be called even if label localization is disabled. In that case we just
/// create an empty label map and populate as needed.
///
/// Only call this if underscores are used to indicate local labels.
/// </summary>
public void MaskLeadingUnderscores() {
bool allGlobal = false;
@ -325,6 +329,14 @@ namespace SourceGen.AsmGen {
LabelMap = new Dictionary<string, string>();
}
// Throw out the original local label generation.
LabelMap.Clear();
// Use this to test for uniqueness. We add all labels here as we go, not just the
// ones being remapped. For each label we either add the original or the localized
// form.
SortedList<string, string> allLabels = new SortedList<string, string>();
for (int i = 0; i < mProject.FileDataLength; i++) {
Symbol sym = mProject.GetAnattrib(i).Symbol;
if (sym == null) {
@ -332,12 +344,43 @@ namespace SourceGen.AsmGen {
continue;
}
if (sym.Label.StartsWith("_") && (allGlobal || mGlobalFlags[i])) {
Debug.WriteLine("Adjusting " + sym.Label);
// TODO: uniquify
LabelMap[sym.Label] = "X" + sym.Label;
string newLabel;
if (allGlobal || mGlobalFlags[i]) {
// Global symbol. Don't let it start with '_'.
if (sym.Label.StartsWith("_")) {
// There's an underscore here that was added by the user. Stick some
// other character in front.
newLabel = "X" + sym.Label;
} else {
// No change needed.
newLabel = sym.Label;
}
} else {
// Local symbol.
if (sym.Label.StartsWith("_")) {
// The original starts with one or more underscores. Adding another
// will create a "__" label, which is reserved in 64tass.
newLabel = "_X" + sym.Label;
} else {
newLabel = "_" + sym.Label;
}
}
// Make sure it's unique.
string uniqueLabel = newLabel;
int uval = 1;
while (allLabels.ContainsKey(uniqueLabel)) {
uniqueLabel = newLabel + uval.ToString();
}
allLabels.Add(uniqueLabel, uniqueLabel);
// If it's different, add it to the label map.
if (sym.Label != uniqueLabel) {
LabelMap.Add(sym.Label, uniqueLabel);
}
}
Debug.WriteLine("UMAP: allcount=" + allLabels.Count + " mapcount=" + LabelMap.Count);
}
}
}

2
SourceGen/RuntimeData/Help/codegen.html
View File

@ -139,6 +139,8 @@ code, but also needs to know how to handle the corner cases.</p>
label is local. If you create labels with leading underscores that
are not local, the labels must be altered to start with some other
character, and made unique.</li>
<li>Labels starting with two underscores are "reserved". Trying to
use them causes an error.</li>
<li>By default, 64tass sets the first two bytes of the output file to
the load address. The <code>--nostart</code> flag is used to
suppress this.</li>

16
SourceGen/SGTestData/2012-label-localizer.dis65
View File

@ -30,7 +30,7 @@
"16":{
"Label":"pastglob","Value":4112,"Source":"User","Type":"LocalOrGlobalAddr"},
"15":{
"Label":"nextglob","Value":4111,"Source":"User","Type":"GlobalAddr"},
"Label":"X_start","Value":4111,"Source":"User","Type":"GlobalAddr"},
"20":{
"Label":"nlocal","Value":4116,"Source":"User","Type":"GlobalAddr"},
"22":{
@ -40,9 +40,9 @@
"30":{
"Label":"reach3G","Value":4126,"Source":"User","Type":"GlobalAddr"},
"31":{
"Label":"reach4","Value":4127,"Source":"User","Type":"LocalOrGlobalAddr"},
"Label":"_reach4","Value":4127,"Source":"User","Type":"LocalOrGlobalAddr"},
"1":{
"Label":"start","Value":4097,"Source":"User","Type":"LocalOrGlobalAddr"},
"Label":"_start","Value":4097,"Source":"User","Type":"LocalOrGlobalAddr"},
"50":{
"Label":"gtest1","Value":4146,"Source":"User","Type":"GlobalAddr"},
"54":{
@ -52,7 +52,7 @@
"61":{
"Label":"topglob","Value":4157,"Source":"User","Type":"GlobalAddr"},
"70":{
"Label":"globalnm","Value":4166,"Source":"User","Type":"LocalOrGlobalAddr"},
"Label":"globalnm","Value":4166,"Source":"User","Type":"GlobalAddr"},
"76":{
"Label":"nglobal","Value":4172,"Source":"User","Type":"LocalOrGlobalAddr"},
"82":{
@ -60,7 +60,11 @@
"77":{
"Label":"globlat","Value":4173,"Source":"User","Type":"GlobalAddr"},
"83":{
"Label":"EXCESSIVELY_LONG_LABEL","Value":4179,"Source":"User","Type":"GlobalAddr"}},
"Label":"EXCESSIVELY_LONG_LABEL","Value":4179,"Source":"User","Type":"GlobalAddr"},
"14":{
"Label":"__nopped","Value":4110,"Source":"User","Type":"LocalOrGlobalAddr"},
"13":{
"Label":"start","Value":4109,"Source":"User","Type":"LocalOrGlobalAddr"}},
"OperandFormats":{
"23":{
"Length":3,"Format":"NumericLE","SubFormat":"Symbol","SymbolRef":{
@ -70,6 +74,6 @@
"Label":"reach2","Part":"Low"}},
"32":{
"Length":3,"Format":"NumericLE","SubFormat":"Symbol","SymbolRef":{
"Label":"reach4","Part":"Low"}},
"Label":"_reach4","Part":"Low"}},
"58":{
"Length":3,"Format":"NumericLE","SubFormat":"Hex","SymbolRef":null}}}

24
SourceGen/SGTestData/Expected/2012-label-localizer_64tass.S
View File

@ -5,13 +5,14 @@ REALLYLONGLABELNAME = $8888 ;that's a long name
.as
.xs
nop
start lda _L100D
lda nextglob
X_start lda _start
lda X_start1
lda pastglob
lda _L100E
_L100D nop
_L100E nop
nextglob
lda _X__nopped
_start nop
_X__nopped
nop
X_start1
nop
pastglob
nop
@ -22,12 +23,13 @@ reach1G nop
lda _reach2+2
_reach2 nop
reach3G nop
_reach4 nop
lda _reach4-2
_X_reach4
nop
lda _X_reach4-2
lda $00
beq _L102D
jsr _reach4
jsr start
jsr _X_reach4
jsr X_start
_L102D lda #$22
lda gtest2
gtest1 nop
@ -42,7 +44,7 @@ topglob nop
nop
_L1043 nop
lda #$44
_globalnm
globalnm
jsr _L104A
nop
_L104A nop

24
SourceGen/SGTestData/Expected/2012-label-localizer_Merlin32.S
View File

@ -2,13 +2,14 @@ REALLYLONGLABELNAME equ $8888 ;that's a long name
org $1000
nop
start lda :L100D
lda nextglob
_start lda :start
lda X_start
lda pastglob
lda :L100E
:L100D nop
:L100E nop
nextglob nop
lda :__nopped
:start nop
:__nopped
nop
X_start nop
pastglob nop
lda nlocal
nlocal lda #$11
@ -17,12 +18,12 @@ reach1G nop
lda :reach2+2
:reach2 nop
reach3G nop
:reach4 nop
lda :reach4-2
:_reach4 nop
lda :_reach4-2
lda $00
beq :L102D
jsr :reach4
jsr start
jsr :_reach4
jsr _start
:L102D lda #$22
lda gtest2
gtest1 nop
@ -37,8 +38,7 @@ topglob nop
nop
:L1043 nop
lda #$44
:globalnm
jsr :L104A
globalnm jsr :L104A
nop
:L104A nop
nop

23
SourceGen/SGTestData/Expected/2012-label-localizer_cc65.S
View File

@ -5,14 +5,14 @@ REALLYLONGLABELNAME = $8888 ;that's a long name
.a8
.i8
nop
start: lda @L100D
lda nextglob
_start: lda @start
lda X_start
lda pastglob
lda @L100E
@L100D: nop
@L100E: nop
nextglob:
lda @__nopped
@start: nop
@__nopped:
nop
X_start: nop
pastglob:
nop
lda nlocal
@ -22,12 +22,13 @@ reach1G: nop
lda @reach2+2
@reach2: nop
reach3G: nop
@reach4: nop
lda @reach4-2
@_reach4:
nop
lda @_reach4-2
lda $00
beq @L102D
jsr @reach4
jsr start
jsr @_reach4
jsr _start
@L102D: lda #$22
lda gtest2
gtest1: nop
@ -42,7 +43,7 @@ topglob: nop
nop
@L1043: nop
lda #$44
@globalnm:
globalnm:
jsr @L104A
nop
@L104A: nop