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Attempt to generate segment names for cc65

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This worked, sort of.  The problem is that SourceGen will revert to
hex output in certain situations, such as a broken symbolic
reference.  There happens to be one in the ZIPPY example, and it's
on a relative branch.

The goal with the segment stuff is to allow cc65 to treat the
source as relocatable code.  In that context, a relative branch to
an absolute address doesn't make any sense, so the assembler reports
a range error.

We don't currently have a mechanism that guarantees no references
are broken (and no affordance for finding them), so we can't make
this mode the default yet.

Instead, we continue to use the generic config, but generate the
correct set of lines as comments.

(issue #39)
This commit is contained in:
Andy McFadden
2018-11-18 14:36:03 -08:00
parent 17f0faa845
commit 2065f4ef9e
43 changed files with 179 additions and 21 deletions
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SourceGen/AddressMap.cs
+28 -16
View File
@@ -85,8 +85,20 @@ namespace SourceGen {
}
/// <summary>
/// Returns the address map entry index associated with the specified offset, or -1
/// if there is no address map entry there.
/// Returns the Nth entry in the address map.
/// </summary>
public AddressMapEntry this[int i] {
get { return mAddrList[i]; }
}
/// <summary>
/// Number of entries in the address map.
/// </summary>
public int Count { get { return mAddrList.Count; } }
/// <summary>
/// Returns the Address value of the address map entry associated with the specified
/// offset, or -1 if there is no address map entry there. The offset must match exactly.
/// </summary>
public int Get(int offset) {
foreach (AddressMapEntry ad in mAddrList) {
@@ -97,6 +109,20 @@ namespace SourceGen {
return -1;
}
/// <summary>
/// Returns the index of the address map entry that contains the given offset.
/// We assume the offset is valid.
/// </summary>
private int IndexForOffset(int offset) {
for (int i = 1; i < mAddrList.Count; i++) {
if (mAddrList[i].Offset > offset) {
return i - 1;
}
}
return mAddrList.Count - 1;
}
/// <summary>
/// Adds, updates, or removes a map entry.
/// </summary>
@@ -165,20 +191,6 @@ namespace SourceGen {
return false;
}
/// <summary>
/// Returns the index of the address map entry that contains the given offset.
/// We assume the offset is valid.
/// </summary>
private int IndexForOffset(int offset) {
for (int i = 1; i < mAddrList.Count; i++) {
if (mAddrList[i].Offset > offset) {
return i - 1;
}
}
return mAddrList.Count - 1;
}
/// <summary>
/// Returns true if the given address falls into the range spanned by the
/// address map entry.