src/libopid/opid.h

   1 #pragma once
   2
   3 #include <stddef.h>
   4 #include <stdint.h>
   5
   6 enum opid_state {
   7     OPID_SUCCESS,
   8     OPID_ERROR_LOOKUP,
   9     OPID_ERROR_OPERAND_0,
  10     OPID_ERROR_OPERAND_1,
  11     OPID_ERROR_OPERAND_2,
  12     OPID_ERROR_OPERAND_3,
  13     OPID_ERROR_OPERAND_4,
  14     OPID_ERROR_OPERAND_5,
  15     OPID_ERROR_OPERAND_6,
  16     OPID_ERROR_OPERAND_7,
  17 };
  18
  19 #define OPID_OPERANDS 8
  20
  21 struct opid_opcode {
  22     uint64_t value;
  23     uint64_t mask;
  24 };
  25
  26 struct opid_record {
  27     struct opid_opcode opcode;
  28     uint8_t operands[OPID_OPERANDS];
  29     char name[16];
  30 };
  31
  32 struct opid_operand {
  33     uint64_t value;
  34     uint64_t flags;
  35 };
  36
  37 #define OPID_OPERAND_SIGNED    (UINT64_C(1) << UINT64_C(0))
  38 #define OPID_OPERAND_GPR       (UINT64_C(1) << UINT64_C(1))
  39 #define OPID_OPERAND_FPR       (UINT64_C(1) << UINT64_C(2))
  40 #define OPID_OPERAND_PAIR      (UINT64_C(1) << UINT64_C(3))
  41 #define OPID_OPERAND_CR3       (UINT64_C(1) << UINT64_C(4))
  42 #define OPID_OPERAND_CR5       (UINT64_C(1) << UINT64_C(5))
  43 #define OPID_OPERAND_NONZERO   (UINT64_C(1) << UINT64_C(6))
  44 #define OPID_OPERAND_ADDRESS   (UINT64_C(1) << UINT64_C(7))
  45
  46 struct opid_ctx {
  47     struct opid_record const *record;
  48     struct opid_operand operands[OPID_OPERANDS];
  49 };
  50
  51 #define opid_foreach_operand(ctx, operand) \
  52     for (size_t id = 0; \
  53         (((operand = &(ctx)->operands[id]), 1) && \
  54             ((id != OPID_OPERANDS) && (ctx)->record->operands[id])); \
  55         operand = &(ctx)->operands[++id])
  56
  57 enum opid_state
  58 opid_disassemble(struct opid_ctx *ctx, uint64_t insn);
  59
  60 struct opid_record const *
  61 opid_lookup_insn(uint64_t insn);