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GP-710 Added register symbol processing to ELF PIC30 import processing.

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Improved code unit operand format to render memory register name when no
reference is present.
This commit is contained in:
ghidra1 2021-02-23 16:06:02 -05:00
parent 7a3945f3bc
commit c545a6fb5a
2 changed files with 45 additions and 1 deletions
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18
Ghidra/Features/Base/src/main/java/ghidra/program/model/listing/CodeUnitFormat.java
View file

@ -493,7 +493,8 @@ public class CodeUnitFormat {
InstructionScalarInfo info = new InstructionScalarInfo(representations, primaryRef);
if (info.hasSingleAddressWithNoScalars()) {
int addressIndex = info.getAddressIndex();
return markupAddressAsScalar(inst, primaryRef, representations, addressIndex);
return markupAddressAsRegister(inst, primaryRef, representations, addressIndex) ||
markupAddressAsScalar(inst, primaryRef, representations, addressIndex);
}
if (info.hasNoScalars()) {
@ -564,6 +565,21 @@ public class CodeUnitFormat {
return primaryRef == null;
}
private boolean markupAddressAsRegister(Instruction instr, Reference primaryRef,
List<Object> representationList, int addressIndex) {
if (primaryRef != null) {
return false;
}
// NOTE: although preferrable, access type/size is not considered
Address addr = (Address) representationList.get(addressIndex);
Register reg = instr.getProgram().getRegister(addr);
if (reg != null) {
representationList.set(addressIndex, reg.getName());
return true;
}
return false;
}
private boolean markupAddressAsScalar(Instruction instr, Reference primaryRef,
List<Object> representationList, int addressIndex) {
Address addr = (Address) representationList.get(addressIndex);

28
Ghidra/Processors/PIC/src/main/java/ghidra/app/util/bin/format/elf/extend/PIC30_ElfExtension.java
View file

@ -22,7 +22,9 @@ import ghidra.app.util.bin.format.elf.*;
import ghidra.program.model.address.Address;
import ghidra.program.model.address.AddressSpace;
import ghidra.program.model.lang.Language;
import ghidra.program.model.lang.Register;
import ghidra.util.exception.CancelledException;
import ghidra.util.exception.NoValueException;
import ghidra.util.task.TaskMonitor;
public class PIC30_ElfExtension extends ElfExtension {
@ -219,6 +221,32 @@ public class PIC30_ElfExtension extends ElfExtension {
return language.getDefaultDataSpace().equals(start.getAddressSpace().getPhysicalSpace());
}
@Override
public Address calculateSymbolAddress(ElfLoadHelper elfLoadHelper, ElfSymbol elfSymbol)
throws NoValueException {
if (elfSymbol.getValue() != 0 || !elfSymbol.isGlobal() ||
elfSymbol.getSectionHeaderIndex() != 0) {
return null;
}
String name = elfSymbol.getNameAsString();
if (name == null) {
return null;
}
if (name.startsWith("_")) {
name = name.substring(1);
}
Register reg = elfLoadHelper.getProgram().getRegister(name);
if (reg != null && !reg.getAddress().isRegisterAddress()) {
return reg.getAddress(); // only consider memory-based registers
}
return null;
}
private static class PIC30FilteredDataInputStream extends FilterInputStream {
// BYTES: <byte> <pad>