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-rw-r--r--tools/llvm-readobj/ARMEHABIPrinter.h290
1 files changed, 288 insertions, 2 deletions
diff --git a/tools/llvm-readobj/ARMEHABIPrinter.h b/tools/llvm-readobj/ARMEHABIPrinter.h
index 2cba126aadf..6a56373e26b 100644
--- a/tools/llvm-readobj/ARMEHABIPrinter.h
+++ b/tools/llvm-readobj/ARMEHABIPrinter.h
@@ -15,12 +15,299 @@
#include "llvm/Object/ELF.h"
#include "llvm/Object/ELFTypes.h"
#include "llvm/Support/ARMEHABI.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/Endian.h"
+#include "llvm/Support/Format.h"
#include "llvm/Support/type_traits.h"
+namespace {
+template <typename type_, size_t N>
+size_t countof(const type_ (&)[N]) {
+ return N;
+}
+}
+
namespace llvm {
namespace ARM {
namespace EHABI {
+
+class OpcodeDecoder {
+ StreamWriter &SW;
+ raw_ostream &OS;
+
+ struct RingEntry {
+ uint8_t Mask;
+ uint8_t Value;
+ void (OpcodeDecoder::*Routine)(const uint8_t *Opcodes, unsigned &OI);
+ };
+ static const RingEntry Ring[];
+
+ void Decode_00xxxxxx(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_01xxxxxx(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_1000iiii_iiiiiiii(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10011101(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10011111(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_1001nnnn(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10100nnn(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10101nnn(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10110000(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10110001_0000iiii(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10110010_uleb128(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10110011_sssscccc(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_101101nn(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_10111nnn(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11000110_sssscccc(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11000111_0000iiii(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11001000_sssscccc(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11001001_sssscccc(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11001yyy(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11000nnn(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11010nnn(const uint8_t *Opcodes, unsigned &OI);
+ void Decode_11xxxyyy(const uint8_t *Opcodes, unsigned &OI);
+
+ void PrintGPR(uint16_t GPRMask);
+ void PrintRegisters(uint32_t Mask, StringRef Prefix);
+
+public:
+ OpcodeDecoder(StreamWriter &SW) : SW(SW), OS(SW.getOStream()) {}
+ void Decode(const uint8_t *Opcodes, off_t Offset, size_t Length);
+};
+
+const OpcodeDecoder::RingEntry OpcodeDecoder::Ring[] = {
+ { 0xc0, 0x00, &OpcodeDecoder::Decode_00xxxxxx },
+ { 0xc0, 0x40, &OpcodeDecoder::Decode_01xxxxxx },
+ { 0xf0, 0x80, &OpcodeDecoder::Decode_1000iiii_iiiiiiii },
+ { 0xff, 0x9d, &OpcodeDecoder::Decode_10011101 },
+ { 0xff, 0x9f, &OpcodeDecoder::Decode_10011111 },
+ { 0xf0, 0x90, &OpcodeDecoder::Decode_1001nnnn },
+ { 0xf8, 0xa0, &OpcodeDecoder::Decode_10100nnn },
+ { 0xf8, 0xa8, &OpcodeDecoder::Decode_10101nnn },
+ { 0xff, 0xb0, &OpcodeDecoder::Decode_10110000 },
+ { 0xff, 0xb1, &OpcodeDecoder::Decode_10110001_0000iiii },
+ { 0xff, 0xb2, &OpcodeDecoder::Decode_10110010_uleb128 },
+ { 0xff, 0xb3, &OpcodeDecoder::Decode_10110011_sssscccc },
+ { 0xfc, 0xb4, &OpcodeDecoder::Decode_101101nn },
+ { 0xf8, 0xb8, &OpcodeDecoder::Decode_10111nnn },
+ { 0xff, 0xc6, &OpcodeDecoder::Decode_11000110_sssscccc },
+ { 0xff, 0xc7, &OpcodeDecoder::Decode_11000111_0000iiii },
+ { 0xff, 0xc8, &OpcodeDecoder::Decode_11001000_sssscccc },
+ { 0xff, 0xc9, &OpcodeDecoder::Decode_11001001_sssscccc },
+ { 0xc8, 0xc8, &OpcodeDecoder::Decode_11001yyy },
+ { 0xf8, 0xc0, &OpcodeDecoder::Decode_11000nnn },
+ { 0xf8, 0xd0, &OpcodeDecoder::Decode_11010nnn },
+ { 0xc0, 0xc0, &OpcodeDecoder::Decode_11xxxyyy },
+};
+
+void OpcodeDecoder::Decode_00xxxxxx(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; vsp = vsp + %u\n", Opcode,
+ ((Opcode & 0x3f) << 2) + 4);
+}
+void OpcodeDecoder::Decode_01xxxxxx(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; vsp = vsp - %u\n", Opcode,
+ ((Opcode & 0x3f) << 2) + 4);
+}
+void OpcodeDecoder::Decode_1000iiii_iiiiiiii(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode0 = Opcodes[OI++ ^ 3];
+ uint8_t Opcode1 = Opcodes[OI++ ^ 3];
+
+ uint16_t GPRMask = (Opcode1 << 4) | ((Opcode0 & 0x0f) << 12);
+ SW.startLine()
+ << format("0x%02X 0x%02X ; %s",
+ Opcode0, Opcode1, GPRMask ? "pop " : "refuse to unwind");
+ if (GPRMask)
+ PrintGPR(GPRMask);
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_10011101(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; reserved (ARM MOVrr)\n", Opcode);
+}
+void OpcodeDecoder::Decode_10011111(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; reserved (WiMMX MOVrr)\n", Opcode);
+}
+void OpcodeDecoder::Decode_1001nnnn(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; vsp = r%u\n", Opcode, (Opcode & 0x0f));
+}
+void OpcodeDecoder::Decode_10100nnn(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; pop ", Opcode);
+ PrintGPR((((1 << ((Opcode & 0x7) + 1)) - 1) << 4));
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_10101nnn(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; pop ", Opcode);
+ PrintGPR((((1 << ((Opcode & 0x7) + 1)) - 1) << 4) | (1 << 14));
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_10110000(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; finish\n", Opcode);
+}
+void OpcodeDecoder::Decode_10110001_0000iiii(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode0 = Opcodes[OI++ ^ 3];
+ uint8_t Opcode1 = Opcodes[OI++ ^ 3];
+
+ SW.startLine()
+ << format("0x%02X 0x%02X ; %s", Opcode0, Opcode1,
+ ((Opcode1 & 0xf0) || Opcode1 == 0x00) ? "spare" : "pop ");
+ if (((Opcode1 & 0xf0) == 0x00) && Opcode1)
+ PrintGPR((Opcode1 & 0x0f));
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_10110010_uleb128(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ", Opcode);
+
+ SmallVector<uint8_t, 4> ULEB;
+ do { ULEB.push_back(Opcodes[OI ^ 3]); } while (Opcodes[OI++ ^ 3] & 0x80);
+
+ for (unsigned BI = 0, BE = ULEB.size(); BI != BE; ++BI)
+ OS << format("0x%02X ", ULEB[BI]);
+
+ uint64_t Value = 0;
+ for (unsigned BI = 0, BE = ULEB.size(); BI != BE; ++BI)
+ Value = Value | ((ULEB[BI] & 0x7f) << (7 * BI));
+
+ OS << format("; vsp = vsp + %u\n", 0x204 + (Value << 2));
+}
+void OpcodeDecoder::Decode_10110011_sssscccc(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode0 = Opcodes[OI++ ^ 3];
+ uint8_t Opcode1 = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
+ uint8_t Start = ((Opcode1 & 0xf0) >> 4);
+ uint8_t Count = ((Opcode1 & 0x0f) >> 0);
+ PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_101101nn(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; spare\n", Opcode);
+}
+void OpcodeDecoder::Decode_10111nnn(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; pop ", Opcode);
+ PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 8), "d");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_11000110_sssscccc(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode0 = Opcodes[OI++ ^ 3];
+ uint8_t Opcode1 = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
+ uint8_t Start = ((Opcode1 & 0xf0) >> 4);
+ uint8_t Count = ((Opcode1 & 0x0f) >> 0);
+ PrintRegisters((((1 << (Count + 1)) - 1) << Start), "wR");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_11000111_0000iiii(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode0 = Opcodes[OI++ ^ 3];
+ uint8_t Opcode1 = Opcodes[OI++ ^ 3];
+ SW.startLine()
+ << format("0x%02X 0x%02X ; %s", Opcode0, Opcode1,
+ ((Opcode1 & 0xf0) || Opcode1 == 0x00) ? "spare" : "pop ");
+ if ((Opcode1 & 0xf0) == 0x00 && Opcode1)
+ PrintRegisters(Opcode1 & 0x0f, "wCGR");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_11001000_sssscccc(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode0 = Opcodes[OI++ ^ 3];
+ uint8_t Opcode1 = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
+ uint8_t Start = 16 + ((Opcode1 & 0xf0) >> 4);
+ uint8_t Count = ((Opcode1 & 0x0f) >> 0);
+ PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_11001001_sssscccc(const uint8_t *Opcodes,
+ unsigned &OI) {
+ uint8_t Opcode0 = Opcodes[OI++ ^ 3];
+ uint8_t Opcode1 = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
+ uint8_t Start = ((Opcode1 & 0xf0) >> 4);
+ uint8_t Count = ((Opcode1 & 0x0f) >> 0);
+ PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_11001yyy(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; spare\n", Opcode);
+}
+void OpcodeDecoder::Decode_11000nnn(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; pop ", Opcode);
+ PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 10), "wR");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_11010nnn(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; pop ", Opcode);
+ PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 8), "d");
+ OS << '\n';
+}
+void OpcodeDecoder::Decode_11xxxyyy(const uint8_t *Opcodes, unsigned &OI) {
+ uint8_t Opcode = Opcodes[OI++ ^ 3];
+ SW.startLine() << format("0x%02X ; spare\n", Opcode);
+}
+
+void OpcodeDecoder::PrintGPR(uint16_t GPRMask) {
+ static const char *GPRRegisterNames[16] = {
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
+ "fp", "ip", "sp", "lr", "pc"
+ };
+
+ OS << '{';
+ bool Comma = false;
+ for (unsigned RI = 0, RE = 17; RI < RE; ++RI) {
+ if (GPRMask & (1 << RI)) {
+ if (Comma)
+ OS << ", ";
+ OS << GPRRegisterNames[RI];
+ Comma = true;
+ }
+ }
+ OS << '}';
+}
+
+void OpcodeDecoder::PrintRegisters(uint32_t VFPMask, StringRef Prefix) {
+ OS << '{';
+ bool Comma = false;
+ for (unsigned RI = 0, RE = 32; RI < RE; ++RI) {
+ if (VFPMask & (1 << RI)) {
+ if (Comma)
+ OS << ", ";
+ OS << Prefix << RI;
+ Comma = true;
+ }
+ }
+ OS << '}';
+}
+
+void OpcodeDecoder::Decode(const uint8_t *Opcodes, off_t Offset, size_t Length) {
+ for (unsigned OCI = Offset; OCI < Length + Offset; ) {
+ bool Decoded = false;
+ for (unsigned REI = 0, REE = countof(Ring); REI != REE && !Decoded; ++REI) {
+ if ((Opcodes[OCI ^ 3] & Ring[REI].Mask) == Ring[REI].Value) {
+ (this->*Ring[REI].Routine)(Opcodes, OCI);
+ Decoded = true;
+ break;
+ }
+ }
+ if (!Decoded)
+ SW.startLine() << format("0x%02X ; reserved\n", Opcodes[OCI++ ^ 3]);
+ }
+}
+
template <typename ET>
class PrinterContext {
StreamWriter &SW;
@@ -171,8 +458,7 @@ template <typename ET>
void PrinterContext<ET>::PrintOpcodes(const uint8_t *Entry,
size_t Length, off_t Offset) const {
ListScope OCC(SW, "Opcodes");
- for (unsigned OCI = Offset; OCI < Length + Offset; OCI++)
- SW.printHex("Opcode", Entry[OCI ^ 0x3]);
+ OpcodeDecoder(OCC.W).Decode(Entry, Offset, Length);
}
template <typename ET>