Changeset 106758 in vbox for trunk/src/VBox/Disassembler/DisasmCore-armv8.cpp

Timestamp:

Oct 28, 2024 3:54:21 PM (3 months ago)

Author:

vboxsync

Message:

Disassembler: Decode ldraa/ldrab instructions, bugref:10394

File:

• trunk/src/VBox/Disassembler/DisasmCore-armv8.cpp (modified) (3 diffs)

trunk/src/VBox/Disassembler/DisasmCore-armv8.cpp

@@ -114 +114 @@
 static FNDISPARSEARMV8 disArmV8ParseSf;
 static FNDISPARSEARMV8 disArmV8ParseImmX16;
+static FNDISPARSEARMV8 disArmV8ParseLdrPacImm;
+static FNDISPARSEARMV8 disArmV8ParseLdrPacW;
 /** @}  */
 
@@ -172 +174 @@
     disArmV8ParseImmHImmB,
     disArmV8ParseSf,
-    disArmV8ParseImmX16
+    disArmV8ParseImmX16,
+    disArmV8ParseLdrPacImm,
+    disArmV8ParseLdrPacW
 };
 
@@ -1030 +1034 @@
 
 
+static int disArmV8ParseLdrPacImm(PDISSTATE pDis, uint32_t u32Insn, PCDISARMV8OPCODE pOp, PCDISARMV8INSNCLASS pInsnClass, PDISOPPARAM pParam, PCDISARMV8INSNPARAM pInsnParm, bool *pf64Bit)
+{
+    RT_NOREF(pDis, pOp, pInsnClass, pParam, pInsnParm, pf64Bit);
+
+    Assert(pInsnParm->cBits == 0);
+    Assert(pInsnParm->idxBitStart == 0);
+    Assert(pParam->armv8.enmType != kDisArmv8OpParmNone);
+
+    uint32_t u32 = disArmV8ExtractBitVecFromInsn(u32Insn, 12, 9) | ((u32Insn & RT_BIT_32(22)) >> 13);
+    pParam->armv8.cb = sizeof(int16_t);
+    pParam->armv8.u.offBase = disArmV8ExtractBitVecFromInsnSignExtend(u32, 0, 10) << 3;
+    return VINF_SUCCESS;
+}
+
+
+static int disArmV8ParseLdrPacW(PDISSTATE pDis, uint32_t u32Insn, PCDISARMV8OPCODE pOp, PCDISARMV8INSNCLASS pInsnClass, PDISOPPARAM pParam, PCDISARMV8INSNPARAM pInsnParm, bool *pf64Bit)
+{
+    RT_NOREF(pDis, pOp, pInsnClass, pParam, pInsnParm, pf64Bit);
+
+    Assert(pInsnParm->cBits == 1);
+    Assert(pInsnParm->idxBitStart == 11);
+    if (u32Insn & RT_BIT_32(11))
+        pParam->fUse |= DISUSE_PRE_INDEXED;
+    return VINF_SUCCESS;
+}
+
+
 static uint32_t disArmV8DecodeIllegal(PDISSTATE pDis, uint32_t u32Insn, PCDISARMV8INSNCLASS pInsnClass)
 {