MIPS disassembler.

    0x0000: invoke-direct {v0}, Ljava/lang/Object;.<init>()V // method@163
            0xf7229004: 8e220050    lw      r2, +80(r17)  ; stack_end_
            0xf7229008: 27bdfff8    addiu   r29, r29, -8
            0xf722900c: afb20004    sw      r18, +4(r29)
            0xf7229010: afbf0000    sw      r31, +0(r29)
            0xf7229014: 27a3ffe8    addiu   r3, r29, -24
            0xf7229018: 0062402b    sltu    r8, r3, r2
            0xf722901c: 15000010    bne     r8, r0, 0xf7229060  ; +68
            0xf7229020: 00000000    nop
            0xf7229024: 0060e825    or      r29, r3, r0
            0xf7229028: afa40000    sw      r4, +0(r29)
            0xf722902c: 00a09025    or      r18, r5, r0
            0xf7229030: 8fa40000    lw      r4, +0(r29)
            0xf7229034: 02402825    or      r5, r18, r0
            0xf7229038: 8c840010    lw      r4, +16(r4)
            0xf722903c: 8c840298    lw      r4, +664(r4)
            0xf7229040: 8c820020    lw      r2, +32(r4)
            0xf7229044: 0040f809    jalr    r2
            0xf7229048: 00000000    nop
    0x0003: return-void
            0xf722904c: 8fb2001c    lw      r18, +28(r29)
            0xf7229050: 8fbf0018    lw      r31, +24(r29)
            0xf7229054: 27bd0020    addiu   r29, r29, 32
            0xf7229058: 03e00008    jr      r31
            0xf722905c: 00000000    nop
    0x0000: invoke-direct {v0}, Ljava/lang/Object;.<init>()V // method@163
            0xf7229060: 27bd0008    addiu   r29, r29, 8
            0xf7229064: 8e2901f4    lw      r9, +500(r17)  ; pThrowStackOverflowFromCode
            0xf7229068: 0120f809    jalr    r9
            0xf722906c: 00000000    nop

Change-Id: Ib5b8c9ed91fa92586f3b93793b5fb893e9ac09c2

4 files changed, 314 insertions, 0 deletions

diff --git a/build/Android.common.mk b/build/Android.common.mk
index 5e93af55de..8f41c2405e 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -100,6 +100,7 @@ OATDUMP_SRC_FILES := \
 	src/oatdump.cc \
 	src/disassembler.cc \
 	src/disassembler_arm.cc \
+	src/disassembler_mips.cc \
 	src/disassembler_x86.cc
 
 OATEXEC_SRC_FILES := \
diff --git a/src/disassembler.cc b/src/disassembler.cc
index 339622981d..8fe3dc70cb 100644
--- a/src/disassembler.cc
+++ b/src/disassembler.cc
@@ -19,6 +19,7 @@
 #include <iostream>
 
 #include "disassembler_arm.h"
+#include "disassembler_mips.h"
 #include "disassembler_x86.h"
 #include "logging.h"
 
@@ -27,6 +28,8 @@ namespace art {
 Disassembler* Disassembler::Create(InstructionSet instruction_set) {
   if (instruction_set == kArm || instruction_set == kThumb2) {
     return new arm::DisassemblerArm();
+  } else if (instruction_set == kMips) {
+    return new mips::DisassemblerMips();
   } else if (instruction_set == kX86) {
     return new x86::DisassemblerX86();
   } else {
diff --git a/src/disassembler_mips.cc b/src/disassembler_mips.cc
new file mode 100644
index 0000000000..f7d755a8de
--- /dev/null
+++ b/src/disassembler_mips.cc
@@ -0,0 +1,271 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "disassembler_mips.h"
+
+#include <iostream>
+
+#include "logging.h"
+#include "stringprintf.h"
+#include "thread.h"
+
+namespace art {
+namespace mips {
+
+struct MipsInstruction {
+  uint32_t mask;
+  uint32_t value;
+  const char* name;
+  const char* args_fmt;
+
+  bool Matches(uint32_t instruction) const {
+    return (instruction & mask) == value;
+  }
+};
+
+static const uint32_t kOpcodeShift = 26;
+
+static const uint32_t kCop1 = (17 << kOpcodeShift);
+
+static const uint32_t kITypeMask = (0x3f << kOpcodeShift);
+static const uint32_t kJTypeMask = (0x3f << kOpcodeShift);
+static const uint32_t kRTypeMask = ((0x3f << kOpcodeShift) | (0x3f));
+static const uint32_t kSpecial2Mask = (0x3f << kOpcodeShift);
+static const uint32_t kFpMask = kRTypeMask;
+
+static const MipsInstruction gMipsInstructions[] = {
+  // "sll r0, r0, 0" is the canonical "nop", used in delay slots.
+  { 0xffffffff, 0, "nop", "" },
+
+  // R-type instructions.
+  { kRTypeMask, 0, "sll", "DTA", },
+  // 0, 1, movci
+  { kRTypeMask, 2, "srl", "DTA", },
+  { kRTypeMask, 3, "sra", "DTA", },
+  { kRTypeMask, 4, "sllv", "DTS", },
+  { kRTypeMask, 6, "srlv", "DTS", },
+  { kRTypeMask, 7, "srav", "DTS", },
+  { kRTypeMask, 8, "jr", "S", },
+  { kRTypeMask | (0x1f << 11), 9 | (31 << 11), "jalr", "S", }, // rd = 31 is implicit.
+  { kRTypeMask, 9, "jalr", "DS", }, // General case.
+  { kRTypeMask | (0x1f << 6), 10, "movz", "DST", },
+  { kRTypeMask | (0x1f << 6), 11, "movn", "DST", },
+  { kRTypeMask, 12, "syscall", "", }, // TODO: code
+  { kRTypeMask, 13, "break", "", }, // TODO: code
+  { kRTypeMask, 15, "sync", "", }, // TODO: type
+  { kRTypeMask, 16, "mfhi", "D", },
+  { kRTypeMask, 17, "mthi", "S", },
+  { kRTypeMask, 18, "mflo", "D", },
+  { kRTypeMask, 19, "mtlo", "S", },
+  { kRTypeMask, 24, "mult", "ST", },
+  { kRTypeMask, 25, "multu", "ST", },
+  { kRTypeMask, 26, "div", "ST", },
+  { kRTypeMask, 27, "divu", "ST", },
+  { kRTypeMask, 32, "add", "DST", },
+  { kRTypeMask, 33, "addu", "DST", },
+  { kRTypeMask, 34, "sub", "DST", },
+  { kRTypeMask, 35, "subu", "DST", },
+  { kRTypeMask, 36, "and", "DST", },
+  { kRTypeMask, 37, "or", "DST", },
+  { kRTypeMask, 38, "xor", "DST", },
+  { kRTypeMask, 39, "nor", "DST", },
+  { kRTypeMask, 42, "slt", "DST", },
+  { kRTypeMask, 43, "sltu", "DST", },
+  // 0, 48, tge
+  // 0, 49, tgeu
+  // 0, 50, tlt
+  // 0, 51, tltu
+  // 0, 52, teq
+  // 0, 54, tne
+
+  // SPECIAL2
+  { kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 2, "mul", "DST" },
+  { kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 32, "clz", "DS" },
+  { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 0, "madd", "ST" },
+  { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 1, "maddu", "ST" },
+  { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 2, "mul", "DST" },
+  { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 4, "msub", "ST" },
+  { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 5, "msubu", "ST" },
+  { kSpecial2Mask | 0x3f, (28 << kOpcodeShift) | 0x3f, "sdbbp", "" }, // TODO: code
+
+  // J-type instructions.
+  { kJTypeMask, 2 << kOpcodeShift, "j", "L" },
+  { kJTypeMask, 3 << kOpcodeShift, "jal", "L" },
+
+  // I-type instructions.
+  { kITypeMask, 4 << kOpcodeShift, "beq", "STB" },
+  { kITypeMask, 5 << kOpcodeShift, "bne", "STB" },
+  { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (1 << 16), "bgez", "SB" },
+  { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (0 << 16), "bltz", "SB" },
+  { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (2 << 16), "bltzl", "SB" },
+  { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (16 << 16), "bltzal", "SB" },
+  { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (18 << 16), "bltzall", "SB" },
+  { kITypeMask | (0x1f << 16), 6 << kOpcodeShift | (0 << 16), "blez", "SB" },
+  { kITypeMask | (0x1f << 16), 7 << kOpcodeShift | (0 << 16), "bgtz", "SB" },
+
+  { 0xffff0000, (4 << kOpcodeShift), "b", "B" },
+  { 0xffff0000, (1 << kOpcodeShift) | (17 << 16), "bal", "B" },
+
+  { kITypeMask, 8 << kOpcodeShift, "addi", "TSi", },
+  { kITypeMask, 9 << kOpcodeShift, "addiu", "TSi", },
+  { kITypeMask, 10 << kOpcodeShift, "slti", "TSi", },
+  { kITypeMask, 11 << kOpcodeShift, "sltiu", "TSi", },
+  { kITypeMask, 12 << kOpcodeShift, "andi", "TSi", },
+  { kITypeMask, 13 << kOpcodeShift, "ori", "TSi", },
+  { kITypeMask, 14 << kOpcodeShift, "ori", "TSi", },
+  { kITypeMask, 15 << kOpcodeShift, "lui", "TI", },
+
+  { kITypeMask, 32 << kOpcodeShift, "lb", "TO", },
+  { kITypeMask, 33 << kOpcodeShift, "lh", "TO", },
+  { kITypeMask, 35 << kOpcodeShift, "lw", "TO", },
+  { kITypeMask, 36 << kOpcodeShift, "lbu", "TO", },
+  { kITypeMask, 37 << kOpcodeShift, "lhu", "TO", },
+  { kITypeMask, 40 << kOpcodeShift, "sb", "TO", },
+  { kITypeMask, 41 << kOpcodeShift, "sh", "TO", },
+  { kITypeMask, 43 << kOpcodeShift, "sw", "TO", },
+  { kITypeMask, 49 << kOpcodeShift, "lwc1", "tO", },
+  { kITypeMask, 57 << kOpcodeShift, "swc1", "tO", },
+
+  // Floating point.
+  { kFpMask,                kCop1 | 0, "add", "fdst" },
+  { kFpMask,                kCop1 | 1, "sub", "fdst" },
+  { kFpMask,                kCop1 | 2, "mul", "fdst" },
+  { kFpMask,                kCop1 | 3, "div", "fdst" },
+  { kFpMask | (0x1f << 16), kCop1 | 4, "sqrt", "fdst" },
+  { kFpMask | (0x1f << 16), kCop1 | 5, "abs", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 6, "mov", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 7, "neg", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 8, "round.l", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 9, "trunc.l", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 10, "ceil.l", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 11, "floor.l", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 12, "round.w", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 13, "trunc.w", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 14, "ceil.w", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 15, "floor.w", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 32, "cvt.s", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 33, "cvt.d", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 36, "cvt.w", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 37, "cvt.l", "fds" },
+  { kFpMask | (0x1f << 16), kCop1 | 38, "cvt.ps", "fds" },
+};
+
+static uint32_t ReadU32(const uint8_t* ptr) {
+  // TODO: MIPS is bi. how do we handle that?
+  return ptr[3] | (ptr[2] << 8) | (ptr[1] << 16) | (ptr[0] << 24);
+  //return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24);
+}
+
+static void DumpMips(std::ostream& os, const uint8_t* instr_ptr) {
+  uint32_t instruction = ReadU32(instr_ptr);
+
+  uint32_t rs = (instruction >> 21) & 0x1f; // I-type, R-type.
+  uint32_t rt = (instruction >> 16) & 0x1f; // I-type, R-type.
+  uint32_t rd = (instruction >> 11) & 0x1f; // R-type.
+  uint32_t sa = (instruction >>  6) & 0x1f; // R-type.
+
+  std::string opcode;
+  std::ostringstream args;
+
+  // TODO: remove this!
+  uint32_t op = (instruction >> 26) & 0x3f;
+  uint32_t function = (instruction & 0x3f); // R-type.
+  opcode = StringPrintf("op=%d fn=%d", op, function);
+
+  for (size_t i = 0; i < arraysize(gMipsInstructions); ++i) {
+    if (gMipsInstructions[i].Matches(instruction)) {
+      opcode = gMipsInstructions[i].name;
+      for (const char* args_fmt = gMipsInstructions[i].args_fmt; *args_fmt; ++args_fmt) {
+        switch (*args_fmt) {
+          case 'A': // sa (shift amount).
+            args << sa;
+            break;
+          case 'B': // Branch offset.
+            {
+              int32_t offset = static_cast<int16_t>(instruction & 0xffff);
+              offset <<= 2;
+              offset += 4; // Delay slot.
+              args << StringPrintf("%p  ; %+d", instr_ptr + offset, offset);
+            }
+            break;
+          case 'D': args << 'r' << rd; break;
+          case 'd': args << 'f' << rd; break;
+          case 'f': // Floating point "fmt".
+            {
+              size_t fmt = (instruction >> 21) & 0x7; // TODO: other fmts?
+              switch (fmt) {
+                case 0: opcode += ".s"; break;
+                case 1: opcode += ".d"; break;
+                case 4: opcode += ".w"; break;
+                case 5: opcode += ".l"; break;
+                case 6: opcode += ".ps"; break;
+                default: opcode += ".?"; break;
+              }
+              continue; // No ", ".
+            }
+            break;
+          case 'I': // Upper 16-bit immediate.
+            args << reinterpret_cast<void*>((instruction & 0xffff) << 16);
+            break;
+          case 'i': // Sign-extended lower 16-bit immediate.
+            args << static_cast<int16_t>(instruction & 0xffff);
+            break;
+          case 'L': // Jump label.
+            {
+              // TODO: is this right?
+              uint32_t instr_index = (instruction & 0x1ffffff);
+              uint32_t target = (instr_index << 2);
+              target |= (reinterpret_cast<uintptr_t>(instr_ptr + 4) & 0xf0000000);
+              args << reinterpret_cast<void*>(target);
+            }
+            break;
+          case 'O': // +x(rs)
+            {
+              int32_t offset = static_cast<int16_t>(instruction & 0xffff);
+              args << StringPrintf("%+d(r%d)", offset, rs);
+              if (rs == 17) {
+                args << "  ; ";
+                Thread::DumpThreadOffset(args, offset, 4);
+              }
+            }
+            break;
+          case 'S': args << 'r' << rs; break;
+          case 's': args << 'f' << rs; break;
+          case 'T': args << 'r' << rt; break;
+          case 't': args << 'f' << rt; break;
+        }
+        if (*(args_fmt + 1)) {
+          args << ", ";
+        }
+      }
+      break;
+    }
+  }
+
+  os << StringPrintf("\t\t\t%p: %08x\t%-7s ", instr_ptr, instruction, opcode.c_str()) << args.str() << '\n';
+}
+
+DisassemblerMips::DisassemblerMips() {
+}
+
+void DisassemblerMips::Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) {
+  for (const uint8_t* cur = begin; cur < end; cur += 4) {
+    DumpMips(os, cur);
+  }
+}
+
+}  // namespace mips
+}  // namespace art
diff --git a/src/disassembler_mips.h b/src/disassembler_mips.h
new file mode 100644
index 0000000000..8c3d0dcce8
--- /dev/null
+++ b/src/disassembler_mips.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_DISASSEMBLER_MIPS_H_
+#define ART_SRC_DISASSEMBLER_MIPS_H_
+
+#include <vector>
+
+#include "disassembler.h"
+
+namespace art {
+namespace mips {
+
+class DisassemblerMips : public Disassembler {
+ public:
+  DisassemblerMips();
+  virtual void Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DisassemblerMips);
+};
+
+}  // namespace mips
+}  // namespace art
+
+#endif  // ART_SRC_DISASSEMBLER_MIPS_H_