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Code Issues Releases Wiki Activity

GP-0: Moving MachoProgramUtils.addExternalBlock() to

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AbstractProgramLoader
This commit is contained in:
Ryan Kurtz 2025-09-03 11:31:56 -04:00
parent d460bf9382
commit 162733b585
5 changed files with 38 additions and 41 deletions
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4
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/macho/commands/chained/DyldChainedFixups.java
View file

@ -24,8 +24,8 @@ import ghidra.app.util.bin.format.macho.dyld.DyldChainedPtr;
import ghidra.app.util.bin.format.macho.dyld.DyldChainedPtr.DyldChainType;
import ghidra.app.util.bin.format.macho.dyld.DyldFixup;
import ghidra.app.util.importer.MessageLog;
import ghidra.app.util.opinion.AbstractProgramLoader;
import ghidra.app.util.opinion.MachoProgramBuilder;
import ghidra.app.util.opinion.MachoProgramUtils;
import ghidra.program.model.address.Address;
import ghidra.program.model.listing.*;
import ghidra.program.model.mem.Memory;
@ -153,7 +153,7 @@ public class DyldChainedFixups {
.mapToLong(DyldFixup::size)
.sum();
if (externalSize > 0) {
extAddr = MachoProgramUtils.addExternalBlock(program, externalSize, log);
extAddr = AbstractProgramLoader.addExternalBlock(program, externalSize, log);
}
}
catch (Exception e) {

36
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/AbstractProgramLoader.java
View file

@ -35,8 +35,7 @@ import ghidra.program.database.function.OverlappingFunctionException;
import ghidra.program.model.address.*;
import ghidra.program.model.lang.*;
import ghidra.program.model.listing.*;
import ghidra.program.model.mem.InvalidAddressException;
import ghidra.program.model.mem.MemoryConflictException;
import ghidra.program.model.mem.*;
import ghidra.program.model.symbol.*;
import ghidra.program.util.DefaultLanguageService;
import ghidra.program.util.GhidraProgramUtilities;
@ -456,6 +455,39 @@ public abstract class AbstractProgramLoader implements Loader {
}
}
/**
* Adds the {@link MemoryBlock#EXTERNAL_BLOCK_NAME EXERNAL block} to memory, or adds to an
* existing one
*
* @param program The {@link Program}
* @param size The desired size of the new EXTERNAL block
* @param log The {@link MessageLog}
* @return The {@link Address} of the new (or new piece) of EXTERNAL block
* @throws Exception if there was an issue creating or adding to the EXTERNAL block
*/
public static Address addExternalBlock(Program program, long size, MessageLog log)
throws Exception {
Memory mem = program.getMemory();
MemoryBlock externalBlock = mem.getBlock(MemoryBlock.EXTERNAL_BLOCK_NAME);
Address ret;
if (externalBlock != null) {
ret = externalBlock.getEnd().add(1);
MemoryBlock newBlock =
mem.createBlock(externalBlock, MemoryBlock.EXTERNAL_BLOCK_NAME, ret, size);
mem.join(externalBlock, newBlock);
}
else {
ret = MachoProgramUtils.getNextAvailableAddress(program);
externalBlock =
mem.createUninitializedBlock(MemoryBlock.EXTERNAL_BLOCK_NAME, ret, size, false);
externalBlock.setWrite(true);
externalBlock.setArtificial(true);
externalBlock.setComment(
"NOTE: This block is artificial and is used to make relocations work correctly");
}
return ret;
}
/**
* Gets the {@link Loader}'s language service.
* <p>

2
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/MachoLoader.java
View file

@ -593,7 +593,7 @@ public class MachoLoader extends AbstractLibrarySupportLoader {
.map(lib.getSymbolTable()::getPrimarySymbol)
.filter(Objects::nonNull)
.toList();
Address addr = MachoProgramUtils.addExternalBlock(program,
Address addr = AbstractProgramLoader.addExternalBlock(program,
reexportedSymbols.size() * 8, log);
monitor.initialize(reexportedSymbols.size(), "Reexporting symbols...");
for (Symbol symbol : reexportedSymbols) {

2
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/MachoProgramBuilder.java
View file

@ -731,7 +731,7 @@ public class MachoProgramBuilder {
return;
}
try {
Address addr = MachoProgramUtils.addExternalBlock(program,
Address addr = AbstractProgramLoader.addExternalBlock(program,
undefinedSymbols.size() * machoHeader.getAddressSize(), log);
monitor.initialize(undefinedSymbols.size(), "Processing undefined symbols...");
for (NList symbol : undefinedSymbols) {

35
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/MachoProgramUtils.java
View file

@ -15,10 +15,8 @@
*/
package ghidra.app.util.opinion;
import ghidra.app.util.importer.MessageLog;
import ghidra.program.model.address.Address;
import ghidra.program.model.listing.Program;
import ghidra.program.model.mem.Memory;
import ghidra.program.model.mem.MemoryBlock;
public class MachoProgramUtils {
@ -46,37 +44,4 @@ public class MachoProgramUtils {
long remainder = maxAddr % 0x1000;
return maxAddress.getNewAddress(maxAddr + 0x1000 - remainder);
}
/**
* Adds the {@link MemoryBlock#EXTERNAL_BLOCK_NAME EXERNAL block} to memory, or adds to an
* existing one
*
* @param program The {@link Program}
* @param size The desired size of the new EXTERNAL block
* @param log The {@link MessageLog}
* @return The {@link Address} of the new (or new piece) of EXTERNAL block
* @throws Exception if there was an issue creating or adding to the EXTERNAL block
*/
public static Address addExternalBlock(Program program, long size, MessageLog log)
throws Exception {
Memory mem = program.getMemory();
MemoryBlock externalBlock = mem.getBlock(MemoryBlock.EXTERNAL_BLOCK_NAME);
Address ret;
if (externalBlock != null) {
ret = externalBlock.getEnd().add(1);
MemoryBlock newBlock =
mem.createBlock(externalBlock, MemoryBlock.EXTERNAL_BLOCK_NAME, ret, size);
mem.join(externalBlock, newBlock);
}
else {
ret = MachoProgramUtils.getNextAvailableAddress(program);
externalBlock =
mem.createUninitializedBlock(MemoryBlock.EXTERNAL_BLOCK_NAME, ret, size, false);
externalBlock.setWrite(true);
externalBlock.setArtificial(true);
externalBlock.setComment(
"NOTE: This block is artificial and is used to make relocations work correctly");
}
return ret;
}
}