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-rw-r--r--src/disassembler_arm.cc263
1 files changed, 149 insertions, 114 deletions
diff --git a/src/disassembler_arm.cc b/src/disassembler_arm.cc
index 8716a71bff..aa7a39b957 100644
--- a/src/disassembler_arm.cc
+++ b/src/disassembler_arm.cc
@@ -256,130 +256,166 @@ size_t DisassemblerArm::DumpThumb32(std::ostream& os, const uint8_t* instr_ptr)
case 0:
break;
case 1:
- switch (op2) {
- case 0x00: case 0x01: case 0x02: case 0x03: case 0x08: case 0x09: case 0x0A: case 0x0B:
- case 0x10: case 0x11: case 0x12: case 0x13: case 0x18: case 0x19: case 0x1A: case 0x1B: {
- // |111|11|10|00|0|00|0000|1111110000000000|
- // |5 3|21|09|87|6|54|3 0|5 0 5 0|
- // |---|--|--|--|-|--|----|----------------|
- // |332|22|22|22|2|22|1111|1111110000000000|
- // |1 9|87|65|43|2|10|9 6|5 0 5 0|
- // |---|--|--|--|-|--|----|----------------|
- // |111|01|00|op|0|WL| Rn | |
- // |111|01| op2 | | |
- // STM - 111 01 00-01-0-W0 nnnn rrrrrrrrrrrrrrrr
- // LDM - 111 01 00-01-0-W1 nnnn rrrrrrrrrrrrrrrr
- // PUSH- 111 01 00-01-0-10 1101 0M0rrrrrrrrrrrrr
- // POP - 111 01 00-01-0-11 1101 PM0rrrrrrrrrrrrr
- uint32_t op = (instr >> 23) & 3;
- uint32_t W = (instr >> 21) & 1;
- uint32_t L = (instr >> 20) & 1;
- ArmRegister Rn(instr, 16);
- if (op == 1 || op == 2) {
- if (op == 1) {
- if (L == 0) {
- opcode << "stm";
+ if ((op2 & 0x64) == 0) { // 00x x0xx
+ // |111|11|10|00|0|00|0000|1111110000000000|
+ // |5 3|21|09|87|6|54|3 0|5 0 5 0|
+ // |---|--|--|--|-|--|----|----------------|
+ // |332|22|22|22|2|22|1111|1111110000000000|
+ // |1 9|87|65|43|2|10|9 6|5 0 5 0|
+ // |---|--|--|--|-|--|----|----------------|
+ // |111|01|00|op|0|WL| Rn | |
+ // |111|01| op2 | | |
+ // STM - 111 01 00-01-0-W0 nnnn rrrrrrrrrrrrrrrr
+ // LDM - 111 01 00-01-0-W1 nnnn rrrrrrrrrrrrrrrr
+ // PUSH- 111 01 00-01-0-10 1101 0M0rrrrrrrrrrrrr
+ // POP - 111 01 00-01-0-11 1101 PM0rrrrrrrrrrrrr
+ uint32_t op = (instr >> 23) & 3;
+ uint32_t W = (instr >> 21) & 1;
+ uint32_t L = (instr >> 20) & 1;
+ ArmRegister Rn(instr, 16);
+ if (op == 1 || op == 2) {
+ if (op == 1) {
+ if (L == 0) {
+ opcode << "stm";
+ args << Rn << (W == 0 ? "" : "!") << ", ";
+ } else {
+ if (Rn.r != 13) {
+ opcode << "ldm";
args << Rn << (W == 0 ? "" : "!") << ", ";
} else {
- if (Rn.r != 13) {
- opcode << "ldm";
- args << Rn << (W == 0 ? "" : "!") << ", ";
- } else {
- opcode << "pop";
- }
+ opcode << "pop";
}
- } else {
- if (L == 0) {
- if (Rn.r != 13) {
- opcode << "stmdb";
- args << Rn << (W == 0 ? "" : "!") << ", ";
- } else {
- opcode << "push";
- }
- } else {
- opcode << "ldmdb";
+ }
+ } else {
+ if (L == 0) {
+ if (Rn.r != 13) {
+ opcode << "stmdb";
args << Rn << (W == 0 ? "" : "!") << ", ";
+ } else {
+ opcode << "push";
}
+ } else {
+ opcode << "ldmdb";
+ args << Rn << (W == 0 ? "" : "!") << ", ";
}
- args << RegisterList(instr);
}
- break;
+ args << RegisterList(instr);
+ }
+ } else if ((op2 & 0x60) == 0x20) { // 01x xxxx
+ // Data-processing (shifted register)
+ // |111|1110|0000|0|0000|1111|1100|0000|0000|
+ // |5 3|2109|8765|4|3 0|5 |10 8|7 5 |3 0|
+ // |---|----|----|-|----|----|----|----|----|
+ // |332|2222|2222|2|1111|1111|1100|0000|0000|
+ // |1 9|8765|4321|0|9 6|5 |10 8|7 5 |3 0|
+ // |---|----|----|-|----|----|----|----|----|
+ // |111|0101| op3|S| Rn | | Rd | | Rm |
+ uint32_t op3 = (instr >> 21) & 0xF;
+ uint32_t S = (instr >> 20) & 1;
+ uint32_t Rn = (instr >> 16) & 0xF;
+ ArmRegister Rd(instr, 8);
+ ArmRegister Rm(instr, 0);
+ switch (op3) {
+ case 0x0:
+ if (Rn != 0xF) {
+ opcode << "and";
+ } else {
+ opcode << "tst";
+ S = 0; // don't print 's'
+ }
+ break;
+ case 0x1: opcode << "bic"; break;
+ case 0x2:
+ if (Rn != 0xF) {
+ opcode << "orr";
+ } else {
+ opcode << "mov";
+ }
+ break;
+ case 0x3:
+ if (Rn != 0xF) {
+ opcode << "orn";
+ } else {
+ opcode << "mvn";
+ }
+ break;
+ case 0x4:
+ if (Rn != 0xF) {
+ opcode << "eor";
+ } else {
+ opcode << "teq";
+ S = 0; // don't print 's'
+ }
+ break;
+ case 0x6: opcode << "pkh"; break;
+ case 0x8:
+ if (Rn != 0xF) {
+ opcode << "add";
+ } else {
+ opcode << "cmn";
+ S = 0; // don't print 's'
+ }
+ break;
+ case 0xA: opcode << "adc"; break;
+ case 0xB: opcode << "sbc"; break;
}
- case 0x20: case 0x21: case 0x22: case 0x23: // 01xxxxx
- case 0x24: case 0x25: case 0x26: case 0x27:
- case 0x28: case 0x29: case 0x2A: case 0x2B:
- case 0x2C: case 0x2D: case 0x2E: case 0x2F:
- case 0x30: case 0x31: case 0x32: case 0x33:
- case 0x34: case 0x35: case 0x36: case 0x37:
- case 0x38: case 0x39: case 0x3A: case 0x3B:
- case 0x3C: case 0x3D: case 0x3E: case 0x3F: {
- // Data-processing (shifted register)
- // |111|1110|0000|0|0000|1111|1100|0000|0000|
- // |5 3|2109|8765|4|3 0|5 |10 8|7 5 |3 0|
- // |---|----|----|-|----|----|----|----|----|
- // |332|2222|2222|2|1111|1111|1100|0000|0000|
- // |1 9|8765|4321|0|9 6|5 |10 8|7 5 |3 0|
- // |---|----|----|-|----|----|----|----|----|
- // |111|0101| op3|S| Rn | | Rd | | Rm |
- uint32_t op3 = (instr >> 21) & 0xF;
- uint32_t S = (instr >> 20) & 1;
- uint32_t Rn = (instr >> 16) & 0xF;
- ArmRegister Rd(instr, 8);
- ArmRegister Rm(instr, 0);
- switch (op3) {
- case 0x0:
- if (Rn != 0xF) {
- opcode << "and";
- } else {
- opcode << "tst";
- S = 0; // don't print 's'
- }
- break;
- case 0x1: opcode << "bic"; break;
- case 0x2:
- if (Rn != 0xF) {
- opcode << "orr";
- } else {
- opcode << "mov";
- }
- break;
- case 0x3:
- if (Rn != 0xF) {
- opcode << "orn";
- } else {
- opcode << "mvn";
- }
- break;
- case 0x4:
- if (Rn != 0xF) {
- opcode << "eor";
- } else {
- opcode << "teq";
- S = 0; // don't print 's'
- }
- break;
- case 0x6: opcode << "pkh"; break;
- case 0x8:
- if (Rn != 0xF) {
- opcode << "add";
- } else {
- opcode << "cmn";
- S = 0; // don't print 's'
- }
- break;
- case 0xA: opcode << "adc"; break;
- case 0xB: opcode << "sbc"; break;
- }
- if (S == 1) {
- opcode << "s";
+ if (S == 1) {
+ opcode << "s";
+ }
+ opcode << ".w";
+ args << Rd << ", " << Rm;
+ } else if ((op2 & 0x40) == 0x40) { // 1xx xxxx
+ // Co-processor instructions
+ // |111|1|11|000000|0000|1111|1100|000|0 |0000|
+ // |5 3|2|10|987654|3 0|54 2|10 8|7 5|4 | 0|
+ // |---|-|--|------|----|----|----|---|---|----|
+ // |332|2|22|222222|1111|1111|1100|000|0 |0000|
+ // |1 9|8|76|543210|9 6|54 2|10 8|7 5|4 | 0|
+ // |---|-|--|------|----|----|----|---|---|----|
+ // |111| |11| op3 | Rn | |copr| |op4| |
+ uint32_t op3 = (instr >> 20) & 0x3F;
+ uint32_t coproc = (instr >> 8) & 0xF;
+ uint32_t op4 = (instr >> 4) & 0x1;
+ if ((op3 & 0x30) == 0x20 && op4 == 0) { // 10 xxxx ... 0
+ if ((coproc & 0xE) == 0xA) {
+ // VFP data-processing instructions
+ // |111|1|1100|0000|0000|1111|110|0|00 |0|0|0000|
+ // |5 3|2|1098|7654|3 0|54 2|10 |8|76 |5|4|3 0|
+ // |---|-|----|----|----|----|---|-|----|-|-|----|
+ // |332|2|2222|2222|1111|1111|110|0|00 |0|0|0000|
+ // |1 9|8|7654|3210|9 6|54 2|109|8|76 |5|4|3 0|
+ // |---|-|----|----|----|----|---|-|----|-|-|----|
+ // |111|T|1110|opc1|opc2| |101| |opc3| | | |
+ // 111 0 1110|1111 0100 1110 101 0 01 1 0 1001 - eef4ea69
+ uint32_t opc1 = (instr >> 20) & 0xF;
+ uint32_t opc2 = (instr >> 16) & 0xF;
+ //uint32_t opc3 = (instr >> 6) & 0x3;
+ if ((opc1 & 0xB) == 0xB) { // 1x11
+ // Other VFP data-processing instructions.
+ switch (opc2) {
+ case 0x4: case 0x5: { // Vector compare
+ // 1110 11101 D 11 0100 dddd 101 sE1M0 mmmm
+ uint32_t D = (instr >> 22) & 0x1;
+ uint32_t Vd = (instr >> 12) & 0xF;
+ uint32_t sz = (instr >> 8) & 1;
+ uint32_t E = (instr >> 7) & 1;
+ uint32_t M = (instr >> 5) & 1;
+ uint32_t Vm = instr & 0xF;
+ bool dp_operation = sz == 1;
+ opcode << (E == 0 ? "vcmp" : "vcmpe");
+ opcode << (dp_operation ? ".f64" : ".f32");
+ if (dp_operation) {
+ args << "f" << ((D << 4) | Vd) << ", " << "f" << ((M << 4) | Vm);
+ } else {
+ args << "f" << ((Vd << 1) | D) << ", " << "f" << ((Vm << 1) | M);
+ }
+ break;
+ }
+ }
+ }
}
- opcode << ".w";
- args << Rd << ", " << Rm;
- break;
}
- default:
- break;
}
break;
case 2:
@@ -393,7 +429,6 @@ size_t DisassemblerArm::DumpThumb32(std::ostream& os, const uint8_t* instr_ptr)
// |---|--|--|----|-|----|-|---|----|--------|
// |111|10|i0| op3|S| Rn |0|iii| Rd |iiiiiiii|
// 111 10 x0 xxxx x xxxx opxxx xxxx xxxxxxxx
- // 111 10 00 0110 0 0000 1 000 0000 10101101 - f0c080ad
uint32_t i = (instr >> 26) & 1;
uint32_t op3 = (instr >> 21) & 0xF;
uint32_t S = (instr >> 20) & 1;
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-10-24 09:29:05 +0000