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Merge remote-tracking branch 'origin/GP-1497_ghidra1_ExternalSafeguard' into Ghidra_10.1

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ghidra1 2021-11-24 15:02:52 -05:00
commit 471e915673
2 changed files with 23 additions and 3 deletions
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8
Ghidra/Features/Base/src/main/java/ghidra/app/util/demangler/DemangledFunction.java
View file

@ -29,6 +29,7 @@ import ghidra.program.model.address.AddressSetView;
import ghidra.program.model.data.*;
import ghidra.program.model.lang.PrototypeModel;
import ghidra.program.model.listing.*;
import ghidra.program.model.mem.MemoryBlock;
import ghidra.program.model.symbol.*;
import ghidra.program.model.util.CodeUnitInsertionException;
import ghidra.util.Msg;
@ -346,6 +347,9 @@ public class DemangledFunction extends DemangledObject {
* This method assumes preconditions test has been run.
*/
private boolean shouldDisassemble(Program program, Address address, DemanglerOptions options) {
if (!address.isMemoryAddress() || MemoryBlock.isExternalBlockAddress(address, program)) {
return false;
}
CodeUnit codeUnit = program.getListing().getCodeUnitAt(address);
return (codeUnit instanceof Data); // preconditions check guarantees data is undefined data.
}
@ -383,9 +387,7 @@ public class DemangledFunction extends DemangledObject {
// sure that the context is correctly set before that happens. Also, be sure to apply
// the function to the correct address.
//TODO revisit this in terms of external block addresses. Also shoul this check
// be moved into the PsuedoDisassembler???
if (!address.isExternalAddress()) {
if (address.isMemoryAddress()) {
address = PseudoDisassembler.setTargeContextForDisassembly(program, address);
}

18
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/util/PseudoDisassembler.java
View file

@ -27,6 +27,7 @@ import ghidra.program.model.listing.*;
import ghidra.program.model.mem.*;
import ghidra.program.model.pcode.PcodeOp;
import ghidra.program.model.symbol.*;
import ghidra.util.Msg;
/**
* PseudoDisassembler.java
@ -387,6 +388,7 @@ public class PseudoDisassembler {
* The process function can control what flows are followed and when to stop.
*
* @param entryPoint start address
* @param maxInstr maximum number of instructions to evaluate
* @param processor processor to use
* @return the address set of instructions that were followed
*/
@ -402,6 +404,8 @@ public class PseudoDisassembler {
* The process function can control what flows are followed and when to stop.
*
* @param entryPoint start address
* @param procContext initial processor context for disassembly
* @param maxInstr maximum number of instructions to evaluate
* @param processor processor to use
* @return the address set of instructions that were followed
*/
@ -579,6 +583,10 @@ public class PseudoDisassembler {
public boolean checkValidSubroutine(Address entryPoint, PseudoDisassemblerContext procContext,
boolean allowExistingInstructions, boolean mustTerminate) {
if (!entryPoint.isMemoryAddress()) {
return false;
}
AddressSet body = new AddressSet();
AddressSet instrStarts = new AddressSet();
AddressSetView execSet = memory.getExecuteSet();
@ -987,6 +995,11 @@ public class PseudoDisassembler {
* @return the correct address to disassemble at if it needs to be aligned
*/
public static Address setTargeContextForDisassembly(Program program, Address addr) {
if (!addr.isMemoryAddress()) {
Msg.error(PseudoDisassembler.class,
"Invalid attempt to adjust disassembler context at " + addr.toString(true));
return addr;
}
Register lowBitCodeMode = program.getRegister(LOW_BIT_CODE_MODE_REGISTER_NAME);
if (lowBitCodeMode == null) {
return addr;
@ -1016,6 +1029,11 @@ public class PseudoDisassembler {
public Address setTargeContextForDisassembly(PseudoDisassemblerContext procContext,
Address addr) {
if (!addr.isMemoryAddress()) {
Msg.error(this,
"Invalid attempt to adjust disassembler context at " + addr.toString(true));
return addr;
}
Register lowBitCodeMode = program.getRegister(LOW_BIT_CODE_MODE_REGISTER_NAME);
if (lowBitCodeMode == null) {
return addr;