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capstone/arch/EVM/EVMDisassembler.c
Richard Henderson 936dca0e2d Constify backends (#1549) 
* Constify registerinfo.py output

Remove two conditionals separating identical bits of code.
Add "const" markup to MCRegisterDesc and MCRegisterClass.

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify instrinfo-arch.py output

In this case, do not actively strip const.

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the AArch64 backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the EVM backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify M680X backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify M68K backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the Mips backend

The Mips backend has not been regenerated from LLVM recently,
and there are more fixups required than I'd like.  Just apply
the fixes to the tables by hand for now.

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the Sparc backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the TMS320C64x backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the X86 backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the XCore backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify systemregister.py output

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the ARM backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the PowerPC backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the MOS65XX backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the SystemZ backend

The mapping of system register to indexes is easy to
generate read-only.  Since we know the indexes are
between 0 and 31, use uint8_t instead of unsigned.

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the WASM backend

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify cs.c

Signed-off-by: Richard Henderson <rth@twiddle.net>

* Constify the BPF backend

Signed-off-by: Richard Henderson <rth@twiddle.net>
2019-12-23 20:30:57 +08:00

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/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh, 2018 */
#include <string.h>
#include <stddef.h> // offsetof macro
// alternatively #include "../../utils.h" like everyone else
#include "EVMDisassembler.h"
#include "EVMMapping.h"
static const short opcodes[256] = {
EVM_INS_STOP,
EVM_INS_ADD,
EVM_INS_MUL,
EVM_INS_SUB,
EVM_INS_DIV,
EVM_INS_SDIV,
EVM_INS_MOD,
EVM_INS_SMOD,
EVM_INS_ADDMOD,
EVM_INS_MULMOD,
EVM_INS_EXP,
EVM_INS_SIGNEXTEND,
-1,
-1,
-1,
-1,
EVM_INS_LT,
EVM_INS_GT,
EVM_INS_SLT,
EVM_INS_SGT,
EVM_INS_EQ,
EVM_INS_ISZERO,
EVM_INS_AND,
EVM_INS_OR,
EVM_INS_XOR,
EVM_INS_NOT,
EVM_INS_BYTE,
-1,
-1,
-1,
-1,
-1,
EVM_INS_SHA3,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
EVM_INS_ADDRESS,
EVM_INS_BALANCE,
EVM_INS_ORIGIN,
EVM_INS_CALLER,
EVM_INS_CALLVALUE,
EVM_INS_CALLDATALOAD,
EVM_INS_CALLDATASIZE,
EVM_INS_CALLDATACOPY,
EVM_INS_CODESIZE,
EVM_INS_CODECOPY,
EVM_INS_GASPRICE,
EVM_INS_EXTCODESIZE,
EVM_INS_EXTCODECOPY,
EVM_INS_RETURNDATASIZE,
EVM_INS_RETURNDATACOPY,
-1,
EVM_INS_BLOCKHASH,
EVM_INS_COINBASE,
EVM_INS_TIMESTAMP,
EVM_INS_NUMBER,
EVM_INS_DIFFICULTY,
EVM_INS_GASLIMIT,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
EVM_INS_POP,
EVM_INS_MLOAD,
EVM_INS_MSTORE,
EVM_INS_MSTORE8,
EVM_INS_SLOAD,
EVM_INS_SSTORE,
EVM_INS_JUMP,
EVM_INS_JUMPI,
EVM_INS_PC,
EVM_INS_MSIZE,
EVM_INS_GAS,
EVM_INS_JUMPDEST,
-1,
-1,
-1,
-1,
EVM_INS_PUSH1,
EVM_INS_PUSH2,
EVM_INS_PUSH3,
EVM_INS_PUSH4,
EVM_INS_PUSH5,
EVM_INS_PUSH6,
EVM_INS_PUSH7,
EVM_INS_PUSH8,
EVM_INS_PUSH9,
EVM_INS_PUSH10,
EVM_INS_PUSH11,
EVM_INS_PUSH12,
EVM_INS_PUSH13,
EVM_INS_PUSH14,
EVM_INS_PUSH15,
EVM_INS_PUSH16,
EVM_INS_PUSH17,
EVM_INS_PUSH18,
EVM_INS_PUSH19,
EVM_INS_PUSH20,
EVM_INS_PUSH21,
EVM_INS_PUSH22,
EVM_INS_PUSH23,
EVM_INS_PUSH24,
EVM_INS_PUSH25,
EVM_INS_PUSH26,
EVM_INS_PUSH27,
EVM_INS_PUSH28,
EVM_INS_PUSH29,
EVM_INS_PUSH30,
EVM_INS_PUSH31,
EVM_INS_PUSH32,
EVM_INS_DUP1,
EVM_INS_DUP2,
EVM_INS_DUP3,
EVM_INS_DUP4,
EVM_INS_DUP5,
EVM_INS_DUP6,
EVM_INS_DUP7,
EVM_INS_DUP8,
EVM_INS_DUP9,
EVM_INS_DUP10,
EVM_INS_DUP11,
EVM_INS_DUP12,
EVM_INS_DUP13,
EVM_INS_DUP14,
EVM_INS_DUP15,
EVM_INS_DUP16,
EVM_INS_SWAP1,
EVM_INS_SWAP2,
EVM_INS_SWAP3,
EVM_INS_SWAP4,
EVM_INS_SWAP5,
EVM_INS_SWAP6,
EVM_INS_SWAP7,
EVM_INS_SWAP8,
EVM_INS_SWAP9,
EVM_INS_SWAP10,
EVM_INS_SWAP11,
EVM_INS_SWAP12,
EVM_INS_SWAP13,
EVM_INS_SWAP14,
EVM_INS_SWAP15,
EVM_INS_SWAP16,
EVM_INS_LOG0,
EVM_INS_LOG1,
EVM_INS_LOG2,
EVM_INS_LOG3,
EVM_INS_LOG4,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
EVM_INS_CREATE,
EVM_INS_CALL,
EVM_INS_CALLCODE,
EVM_INS_RETURN,
EVM_INS_DELEGATECALL,
EVM_INS_CALLBLACKBOX,
-1,
-1,
-1,
-1,
EVM_INS_STATICCALL,
-1,
-1,
EVM_INS_REVERT,
-1,
EVM_INS_SUICIDE,
};
bool EVM_getInstruction(csh ud, const uint8_t *code, size_t code_len,
MCInst *MI, uint16_t *size, uint64_t address, void *inst_info)
{
unsigned char opcode;
if (code_len == 0)
return false;
opcode = code[0];
if (opcodes[opcode] == -1) {
// invalid opcode
return false;
}
// valid opcode
MI->address = address;
MI->OpcodePub = MI->Opcode = opcode;
if (opcode >= EVM_INS_PUSH1 && opcode <= EVM_INS_PUSH32) {
unsigned char len = (opcode - EVM_INS_PUSH1 + 1);
if (code_len < 1 + len) {
// not enough data
return false;
}
*size = 1 + len;
memcpy(MI->evm_data, code + 1, len);
} else
*size = 1;
if (MI->flat_insn->detail) {
memset(MI->flat_insn->detail, 0, offsetof(cs_detail, evm)+sizeof(cs_evm));
EVM_get_insn_id((cs_struct *)ud, MI->flat_insn, opcode);
if (MI->flat_insn->detail->evm.pop) {
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_STACK_READ;
MI->flat_insn->detail->groups_count++;
}
if (MI->flat_insn->detail->evm.push) {
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_STACK_WRITE;
MI->flat_insn->detail->groups_count++;
}
// setup groups
switch(opcode) {
default:
break;
case EVM_INS_ADD:
case EVM_INS_MUL:
case EVM_INS_SUB:
case EVM_INS_DIV:
case EVM_INS_SDIV:
case EVM_INS_MOD:
case EVM_INS_SMOD:
case EVM_INS_ADDMOD:
case EVM_INS_MULMOD:
case EVM_INS_EXP:
case EVM_INS_SIGNEXTEND:
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_MATH;
MI->flat_insn->detail->groups_count++;
break;
case EVM_INS_MSTORE:
case EVM_INS_MSTORE8:
case EVM_INS_CALLDATACOPY:
case EVM_INS_CODECOPY:
case EVM_INS_EXTCODECOPY:
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_MEM_WRITE;
MI->flat_insn->detail->groups_count++;
break;
case EVM_INS_MLOAD:
case EVM_INS_CREATE:
case EVM_INS_CALL:
case EVM_INS_CALLCODE:
case EVM_INS_RETURN:
case EVM_INS_DELEGATECALL:
case EVM_INS_REVERT:
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_MEM_READ;
MI->flat_insn->detail->groups_count++;
break;
case EVM_INS_SSTORE:
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_STORE_WRITE;
MI->flat_insn->detail->groups_count++;
break;
case EVM_INS_SLOAD:
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_STORE_READ;
MI->flat_insn->detail->groups_count++;
break;
case EVM_INS_JUMP:
case EVM_INS_JUMPI:
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_JUMP;
MI->flat_insn->detail->groups_count++;
break;
case EVM_INS_STOP:
case EVM_INS_SUICIDE:
MI->flat_insn->detail->groups[MI->flat_insn->detail->groups_count] = EVM_GRP_HALT;
MI->flat_insn->detail->groups_count++;
break;
}
}
return true;
}
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