/src/capstonenext/Mapping.h

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/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2019 */
/*    Rot127 <unisono@quyllur.org>, 2022-2023 */

#ifndef CS_MAPPING_H
#define CS_MAPPING_H

#if defined(CAPSTONE_HAS_OSXKERNEL)
#include <libkern/libkern.h>
#else
#include "include/capstone/capstone.h"
#include <stddef.h>
#endif
#include "cs_priv.h"
#include <assert.h>
#include <string.h>

// map instruction to its characteristics
typedef struct insn_map {
  unsigned short id;        // The LLVM instruction id
  unsigned short mapid;       // The Capstone instruction id
#ifndef CAPSTONE_DIET
  uint16_t regs_use[MAX_IMPL_R_REGS]; ///< list of implicit registers used by
              ///< this instruction
  uint16_t regs_mod[MAX_IMPL_W_REGS]; ///< list of implicit registers modified
              ///< by this instruction
  unsigned char groups
    [MAX_NUM_GROUPS]; ///< list of group this instruction belong to
  bool branch;      // branch instruction?
  bool indirect_branch;   // indirect branch instruction?
  union {
    ppc_suppl_info ppc;
  } suppl_info; // Supplementary information for each instruction.
#endif
} insn_map;

// look for @id in @m, given its size in @max. first time call will update
// @cache. return 0 if not found
unsigned short insn_find(const insn_map *m, unsigned int max, unsigned int id,
       unsigned short **cache);

unsigned int find_cs_id(unsigned MC_Opcode, const insn_map *imap,
      unsigned imap_size);

#define MAX_NO_DATA_TYPES 10

///< A LLVM<->CS Mapping entry of an MCOperand.
typedef struct {
  uint8_t /* cs_op_type */ type;   ///< Operand type (e.g.: reg, imm, mem)
  uint8_t /* cs_ac_type */ access; ///< The access type (read, write)
  uint8_t        /* cs_data_type */
    dtypes[MAX_NO_DATA_TYPES]; ///< List of op types. Terminated by
             ///< CS_DATA_TYPE_LAST
} mapping_op;

#define MAX_NO_INSN_MAP_OPS 16

///< MCOperands of an instruction.
typedef struct {
  mapping_op
    ops[MAX_NO_INSN_MAP_OPS]; ///< NULL terminated array of insn_op.
} map_insn_ops;

/// Only usable by `auto-sync` archs!
const cs_op_type mapping_get_op_type(MCInst *MI, unsigned OpNum,
             const map_insn_ops *insn_ops_map,
             size_t map_size);

/// Only usable by `auto-sync` archs!
const cs_ac_type mapping_get_op_access(MCInst *MI, unsigned OpNum,
               const map_insn_ops *insn_ops_map,
               size_t map_size);

/// Macro for easier access of operand types from the map.
/// Assumes the istruction operands map is called "insn_operands"
/// Only usable by `auto-sync` archs!
#define map_get_op_type(MI, OpNum) \
  mapping_get_op_type(MI, OpNum, (const map_insn_ops *)insn_operands, \
          sizeof(insn_operands) / sizeof(insn_operands[0]))

/// Macro for easier access of operand access flags from the map.
/// Assumes the istruction operands map is called "insn_operands"
/// Only usable by `auto-sync` archs!
#define map_get_op_access(MI, OpNum) \
  mapping_get_op_access(MI, OpNum, (const map_insn_ops *)insn_operands, \
            sizeof(insn_operands) / \
              sizeof(insn_operands[0]))

///< Map for ids to their string
typedef struct name_map {
  unsigned int id;
  const char *name;
} name_map;

// map a name to its ID
// return 0 if not found
int name2id(const name_map *map, int max, const char *name);

// map ID to a name
// return NULL if not found
const char *id2name(const name_map *map, int max, const unsigned int id);

void map_add_implicit_write(MCInst *MI, uint32_t Reg);
void map_add_implicit_read(MCInst *MI, uint32_t Reg);
void map_remove_implicit_write(MCInst *MI, uint32_t Reg);

void map_implicit_reads(MCInst *MI, const insn_map *imap);

void map_implicit_writes(MCInst *MI, const insn_map *imap);

void add_group(MCInst *MI, unsigned /* arch_group */ group);

void map_groups(MCInst *MI, const insn_map *imap);

void map_cs_id(MCInst *MI, const insn_map *imap, unsigned int imap_size);

#define DECL_get_detail_op(arch, ARCH) \
  cs_##arch##_op *ARCH##_get_detail_op(MCInst *MI, int offset);

DECL_get_detail_op(arm, ARM);
DECL_get_detail_op(ppc, PPC);
DECL_get_detail_op(tricore, TriCore);

/// Increments the detail->arch.op_count by one.
#define DEFINE_inc_detail_op_count(arch, ARCH) \
  static inline void ARCH##_inc_op_count(MCInst *MI) \
  { \
    MI->flat_insn->detail->arch.op_count++; \
  }

/// Decrements the detail->arch.op_count by one.
#define DEFINE_dec_detail_op_count(arch, ARCH) \
  static inline void ARCH##_dec_op_count(MCInst *MI) \
  { \
    MI->flat_insn->detail->arch.op_count--; \
  }

DEFINE_inc_detail_op_count(arm, ARM);
DEFINE_dec_detail_op_count(arm, ARM);
DEFINE_inc_detail_op_count(ppc, PPC);
DEFINE_dec_detail_op_count(ppc, PPC);
DEFINE_inc_detail_op_count(tricore, TriCore);
DEFINE_dec_detail_op_count(tricore, TriCore);

/// Returns true if a memory operand is currently edited.
static inline bool doing_mem(const MCInst *MI)
{
  return MI->csh->doing_mem;
}

/// Sets the doing_mem flag to @status.
static inline void set_doing_mem(const MCInst *MI, bool status)
{
  MI->csh->doing_mem = status;
}

/// Returns detail->arch
#define DEFINE_get_arch_detail(arch, ARCH) \
  static inline cs_##arch *ARCH##_get_detail(const MCInst *MI) \
  { \
    assert(MI && MI->flat_insn && MI->flat_insn->detail); \
    return &MI->flat_insn->detail->arch; \
  }

DEFINE_get_arch_detail(arm, ARM);
DEFINE_get_arch_detail(ppc, PPC);
DEFINE_get_arch_detail(tricore, TriCore);

static inline bool detail_is_set(const MCInst *MI)
{
  assert(MI && MI->flat_insn);
  return MI->flat_insn->detail != NULL && MI->csh->detail_opt & CS_OPT_ON;
}

static inline cs_detail *get_detail(const MCInst *MI)
{
  assert(MI && MI->flat_insn);
  return MI->flat_insn->detail;
}

static inline bool set_detail_ops(const MCInst *MI)
{
  assert(MI && MI->flat_insn);
  return MI->fillDetailOps;
}

/// Returns if the given instruction is an alias instruction.
#define RETURN_IF_INSN_IS_ALIAS(MI) \
do { \
  if (MI->isAliasInstr) \
    return; \
} while(0)

void map_set_fill_detail_ops(MCInst *MI, bool Val);

static inline bool map_fill_detail_ops(MCInst *MI) {
  assert(MI);
  return MI->fillDetailOps;
}

void map_set_is_alias_insn(MCInst *MI, bool Val, uint64_t Alias);

bool map_use_alias_details(const MCInst *MI);

void map_set_alias_id(MCInst *MI, const SStream *O, const name_map *alias_mnem_id_map, int map_size);

#endif // CS_MAPPING_H

Coverage Report

Created: 2023-09-25 06:24