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GP-1650: Introduce Reason for reading state. Fix spurrious uninit warnings.

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Dan
2022-09-22 14:47:08 -04:00
parent 45165ea167
commit dcd54c6695
44 changed files with 224 additions and 151 deletions
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13
Ghidra/Debug/Debugger/ghidra_scripts/DemoSyscallLibrary.java
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@@ -24,6 +24,7 @@ import ghidra.pcode.emu.sys.AnnotatedEmuSyscallUseropLibrary;
import ghidra.pcode.emu.sys.EmuSyscallLibrary;
import ghidra.pcode.exec.*;
import ghidra.pcode.exec.PcodeArithmetic.Purpose;
import ghidra.pcode.exec.PcodeExecutorStatePiece.Reason;
import ghidra.pcode.struct.StructuredSleigh;
import ghidra.pcode.utils.Utils;
import ghidra.program.model.address.AddressSpace;
@@ -102,13 +103,15 @@ public class DemoSyscallLibrary extends AnnotatedEmuSyscallUseropLibrary<byte[]>
}
/**
* {@inheritDoc}
*
* The dispatcher doesn't know where the system call number is stored. It relies on this method
* to read that number from the state. Here we'll assume the target is x64 and RAX contains the
* syscall number.
*/
@Override
public long readSyscallNumber(PcodeExecutorStatePiece<byte[], byte[]> state) {
return Utils.bytesToLong(state.getVar(regRAX), regRAX.getNumBytes(),
public long readSyscallNumber(PcodeExecutorState<byte[]> state, Reason reason) {
return Utils.bytesToLong(state.getVar(regRAX, reason), regRAX.getNumBytes(),
machine.getLanguage().isBigEndian());
}
@@ -165,7 +168,7 @@ public class DemoSyscallLibrary extends AnnotatedEmuSyscallUseropLibrary<byte[]>
*/
@PcodeUserop
@EmuSyscall("write")
public void demo_write(byte[] str, byte[] end) {
public void demo_write(@OpExecutor PcodeExecutor<byte[]> executor, byte[] str, byte[] end) {
AddressSpace space = machine.getLanguage().getDefaultSpace();
/**
* Because we have concrete {@code byte[]}, we could use Utils.bytesToLong, but for
@@ -178,8 +181,8 @@ public class DemoSyscallLibrary extends AnnotatedEmuSyscallUseropLibrary<byte[]>
long strLong = arithmetic.toLong(str, Purpose.LOAD);
long endLong = arithmetic.toLong(end, Purpose.OTHER);
byte[] stringBytes =
machine.getSharedState().getVar(space, strLong, (int) (endLong - strLong), true);
byte[] stringBytes = machine.getSharedState()
.getVar(space, strLong, (int) (endLong - strLong), true, executor.getReason());
String string = new String(stringBytes, UTF8);
script.println(string);
}