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cs.c
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cs.c
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/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <[email protected]>, 2013-2019 */
#ifdef _MSC_VER
#pragma warning(disable:4996) // disable MSVC's warning on strcpy()
#pragma warning(disable:28719) // disable MSVC's warning on strcpy()
#endif
#if defined(CAPSTONE_HAS_OSXKERNEL)
#include <Availability.h>
#include <libkern/libkern.h>
#else
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#endif
#include <string.h>
#include <capstone/capstone.h>
#include "utils.h"
#include "MCRegisterInfo.h"
#if defined(_KERNEL_MODE)
#include "windows\winkernel_mm.h"
#endif
// Issue #681: Windows kernel does not support formatting float point
#if defined(_KERNEL_MODE) && !defined(CAPSTONE_DIET)
#if defined(CAPSTONE_HAS_ARM) || defined(CAPSTONE_HAS_AARCH64) || defined(CAPSTONE_HAS_M68K)
#define CAPSTONE_STR_INTERNAL(x) #x
#define CAPSTONE_STR(x) CAPSTONE_STR_INTERNAL(x)
#define CAPSTONE_MSVC_WRANING_PREFIX __FILE__ "("CAPSTONE_STR(__LINE__)") : warning message : "
#pragma message(CAPSTONE_MSVC_WRANING_PREFIX "Windows driver does not support full features for selected architecture(s). Define CAPSTONE_DIET to compile Capstone with only supported features. See issue #681 for details.")
#undef CAPSTONE_MSVC_WRANING_PREFIX
#undef CAPSTONE_STR
#undef CAPSTONE_STR_INTERNAL
#endif
#endif // defined(_KERNEL_MODE) && !defined(CAPSTONE_DIET)
#if !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(CAPSTONE_DIET) && !defined(_KERNEL_MODE)
#define INSN_CACHE_SIZE 32
#else
// reduce stack variable size for kernel/firmware
#define INSN_CACHE_SIZE 8
#endif
// default SKIPDATA mnemonic
#ifndef CAPSTONE_DIET
#define SKIPDATA_MNEM ".byte"
#else // No printing is available in diet mode
#define SKIPDATA_MNEM NULL
#endif
#include "arch/AArch64/AArch64Module.h"
#include "arch/ARM/ARMModule.h"
#include "arch/EVM/EVMModule.h"
#include "arch/WASM/WASMModule.h"
#include "arch/M680X/M680XModule.h"
#include "arch/M68K/M68KModule.h"
#include "arch/Mips/MipsModule.h"
#include "arch/PowerPC/PPCModule.h"
#include "arch/Sparc/SparcModule.h"
#include "arch/SystemZ/SystemZModule.h"
#include "arch/TMS320C64x/TMS320C64xModule.h"
#include "arch/X86/X86Module.h"
#include "arch/XCore/XCoreModule.h"
#include "arch/RISCV/RISCVModule.h"
#include "arch/MOS65XX/MOS65XXModule.h"
#include "arch/BPF/BPFModule.h"
#include "arch/SH/SHModule.h"
#include "arch/TriCore/TriCoreModule.h"
#include "arch/Alpha/AlphaModule.h"
typedef struct cs_arch_config {
// constructor initialization
cs_err (*arch_init)(cs_struct *);
// support cs_option()
cs_err (*arch_option)(cs_struct *, cs_opt_type, size_t value);
// bitmask for finding disallowed modes for an arch:
// to be called in cs_open()/cs_option()
cs_mode arch_disallowed_mode_mask;
} cs_arch_config;
#define CS_ARCH_CONFIG_ARM \
{ \
ARM_global_init, \
ARM_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_ARM | CS_MODE_V8 | CS_MODE_MCLASS | CS_MODE_THUMB | CS_MODE_BIG_ENDIAN), \
}
#define CS_ARCH_CONFIG_AARCH64 \
{ \
AArch64_global_init, \
AArch64_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_ARM | CS_MODE_BIG_ENDIAN), \
}
#define CS_ARCH_CONFIG_MIPS \
{ \
Mips_global_init, \
Mips_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_32 | CS_MODE_64 | CS_MODE_MICRO \
| CS_MODE_MIPS32R6 | CS_MODE_BIG_ENDIAN | CS_MODE_MIPS2 | CS_MODE_MIPS3), \
}
#define CS_ARCH_CONFIG_X86 \
{ \
X86_global_init, \
X86_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_32 | CS_MODE_64 | CS_MODE_16), \
}
#define CS_ARCH_CONFIG_PPC \
{ \
PPC_global_init, \
PPC_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_32 | CS_MODE_64 | CS_MODE_BIG_ENDIAN \
| CS_MODE_QPX | CS_MODE_PS | CS_MODE_BOOKE), \
}
#define CS_ARCH_CONFIG_SPARC \
{ \
Sparc_global_init, \
Sparc_option, \
~(CS_MODE_BIG_ENDIAN | CS_MODE_V9), \
}
#define CS_ARCH_CONFIG_SYSZ \
{ \
SystemZ_global_init, \
SystemZ_option, \
~(CS_MODE_BIG_ENDIAN), \
}
#define CS_ARCH_CONFIG_XCORE \
{ \
XCore_global_init, \
XCore_option, \
~(CS_MODE_BIG_ENDIAN), \
}
#define CS_ARCH_CONFIG_M68K \
{ \
M68K_global_init, \
M68K_option, \
~(CS_MODE_BIG_ENDIAN | CS_MODE_M68K_000 | CS_MODE_M68K_010 | CS_MODE_M68K_020 \
| CS_MODE_M68K_030 | CS_MODE_M68K_040 | CS_MODE_M68K_060), \
}
#define CS_ARCH_CONFIG_TMS320C64X \
{ \
TMS320C64x_global_init, \
TMS320C64x_option, \
~(CS_MODE_BIG_ENDIAN), \
}
#define CS_ARCH_CONFIG_M680X \
{ \
M680X_global_init, \
M680X_option, \
~(CS_MODE_M680X_6301 | CS_MODE_M680X_6309 | CS_MODE_M680X_6800 \
| CS_MODE_M680X_6801 | CS_MODE_M680X_6805 | CS_MODE_M680X_6808 \
| CS_MODE_M680X_6809 | CS_MODE_M680X_6811 | CS_MODE_M680X_CPU12 \
| CS_MODE_M680X_HCS08), \
}
#define CS_ARCH_CONFIG_EVM \
{ \
EVM_global_init, \
EVM_option, \
0, \
}
#define CS_ARCH_CONFIG_MOS65XX \
{ \
MOS65XX_global_init, \
MOS65XX_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_MOS65XX_6502 | CS_MODE_MOS65XX_65C02 \
| CS_MODE_MOS65XX_W65C02 | CS_MODE_MOS65XX_65816_LONG_MX), \
}
#define CS_ARCH_CONFIG_WASM \
{ \
WASM_global_init, \
WASM_option, \
0, \
}
#define CS_ARCH_CONFIG_BPF \
{ \
BPF_global_init, \
BPF_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_BPF_CLASSIC | CS_MODE_BPF_EXTENDED \
| CS_MODE_BIG_ENDIAN), \
}
#define CS_ARCH_CONFIG_RISCV \
{ \
RISCV_global_init, \
RISCV_option, \
~(CS_MODE_RISCV32 | CS_MODE_RISCV64 | CS_MODE_RISCVC), \
}
#define CS_ARCH_CONFIG_SH \
{ \
SH_global_init, \
SH_option, \
~(CS_MODE_SH2 | CS_MODE_SH2A | CS_MODE_SH3 | \
CS_MODE_SH4 | CS_MODE_SH4A | \
CS_MODE_SHFPU | CS_MODE_SHDSP|CS_MODE_BIG_ENDIAN), \
}
#define CS_ARCH_CONFIG_TRICORE \
{ \
TRICORE_global_init, \
TRICORE_option, \
~(CS_MODE_TRICORE_110 | CS_MODE_TRICORE_120 | CS_MODE_TRICORE_130 \
| CS_MODE_TRICORE_131 | CS_MODE_TRICORE_160 | CS_MODE_TRICORE_161 \
| CS_MODE_TRICORE_162 | CS_MODE_LITTLE_ENDIAN), \
}
#define CS_ARCH_CONFIG_ALPHA \
{ \
ALPHA_global_init, \
ALPHA_option, \
~(CS_MODE_LITTLE_ENDIAN | CS_MODE_BIG_ENDIAN), \
}
#ifdef CAPSTONE_USE_ARCH_REGISTRATION
static cs_arch_config arch_configs[MAX_ARCH];
static uint32_t all_arch;
#else
static const cs_arch_config arch_configs[MAX_ARCH] = {
#ifdef CAPSTONE_HAS_ARM
CS_ARCH_CONFIG_ARM,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_AARCH64
CS_ARCH_CONFIG_AARCH64,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_MIPS
CS_ARCH_CONFIG_MIPS,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_X86
CS_ARCH_CONFIG_X86,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_POWERPC
CS_ARCH_CONFIG_PPC,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_SPARC
CS_ARCH_CONFIG_SPARC,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_SYSZ
CS_ARCH_CONFIG_SYSZ,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_XCORE
CS_ARCH_CONFIG_XCORE,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_M68K
CS_ARCH_CONFIG_M68K,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_TMS320C64X
CS_ARCH_CONFIG_TMS320C64X,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_M680X
CS_ARCH_CONFIG_M680X,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_EVM
CS_ARCH_CONFIG_EVM,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_MOS65XX
CS_ARCH_CONFIG_MOS65XX,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_WASM
CS_ARCH_CONFIG_WASM,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_BPF
CS_ARCH_CONFIG_BPF,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_RISCV
CS_ARCH_CONFIG_RISCV,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_SH
CS_ARCH_CONFIG_SH,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_TRICORE
CS_ARCH_CONFIG_TRICORE,
#else
{ NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_ALPHA
CS_ARCH_CONFIG_ALPHA,
#else
{ NULL, NULL, 0 },
#endif
};
// bitmask of enabled architectures
static const uint32_t all_arch = 0
#ifdef CAPSTONE_HAS_ARM
| (1 << CS_ARCH_ARM)
#endif
#if defined(CAPSTONE_HAS_AARCH64) || defined(CAPSTONE_HAS_ARM64)
| (1 << CS_ARCH_AARCH64)
#endif
#ifdef CAPSTONE_HAS_MIPS
| (1 << CS_ARCH_MIPS)
#endif
#ifdef CAPSTONE_HAS_X86
| (1 << CS_ARCH_X86)
#endif
#ifdef CAPSTONE_HAS_POWERPC
| (1 << CS_ARCH_PPC)
#endif
#ifdef CAPSTONE_HAS_SPARC
| (1 << CS_ARCH_SPARC)
#endif
#ifdef CAPSTONE_HAS_SYSZ
| (1 << CS_ARCH_SYSZ)
#endif
#ifdef CAPSTONE_HAS_XCORE
| (1 << CS_ARCH_XCORE)
#endif
#ifdef CAPSTONE_HAS_M68K
| (1 << CS_ARCH_M68K)
#endif
#ifdef CAPSTONE_HAS_TMS320C64X
| (1 << CS_ARCH_TMS320C64X)
#endif
#ifdef CAPSTONE_HAS_M680X
| (1 << CS_ARCH_M680X)
#endif
#ifdef CAPSTONE_HAS_EVM
| (1 << CS_ARCH_EVM)
#endif
#ifdef CAPSTONE_HAS_MOS65XX
| (1 << CS_ARCH_MOS65XX)
#endif
#ifdef CAPSTONE_HAS_WASM
| (1 << CS_ARCH_WASM)
#endif
#ifdef CAPSTONE_HAS_BPF
| (1 << CS_ARCH_BPF)
#endif
#ifdef CAPSTONE_HAS_RISCV
| (1 << CS_ARCH_RISCV)
#endif
#ifdef CAPSTONE_HAS_SH
| (1 << CS_ARCH_SH)
#endif
#ifdef CAPSTONE_HAS_TRICORE
| (1 << CS_ARCH_TRICORE)
#endif
#ifdef CAPSTONE_HAS_ALPHA
| (1 << CS_ARCH_ALPHA)
#endif
;
#endif
#if defined(CAPSTONE_USE_SYS_DYN_MEM)
#if !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(_KERNEL_MODE)
// default
cs_malloc_t cs_mem_malloc = malloc;
cs_calloc_t cs_mem_calloc = calloc;
cs_realloc_t cs_mem_realloc = realloc;
cs_free_t cs_mem_free = free;
#if defined(_WIN32_WCE)
cs_vsnprintf_t cs_vsnprintf = _vsnprintf;
#else
cs_vsnprintf_t cs_vsnprintf = vsnprintf;
#endif // defined(_WIN32_WCE)
#elif defined(_KERNEL_MODE)
// Windows driver
cs_malloc_t cs_mem_malloc = cs_winkernel_malloc;
cs_calloc_t cs_mem_calloc = cs_winkernel_calloc;
cs_realloc_t cs_mem_realloc = cs_winkernel_realloc;
cs_free_t cs_mem_free = cs_winkernel_free;
cs_vsnprintf_t cs_vsnprintf = cs_winkernel_vsnprintf;
#else
// OSX kernel
extern void* kern_os_malloc(size_t size);
extern void kern_os_free(void* addr);
extern void* kern_os_realloc(void* addr, size_t nsize);
static void* cs_kern_os_calloc(size_t num, size_t size)
{
return kern_os_malloc(num * size); // malloc bzeroes the buffer
}
cs_malloc_t cs_mem_malloc = kern_os_malloc;
cs_calloc_t cs_mem_calloc = cs_kern_os_calloc;
cs_realloc_t cs_mem_realloc = kern_os_realloc;
cs_free_t cs_mem_free = kern_os_free;
cs_vsnprintf_t cs_vsnprintf = vsnprintf;
#endif // !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(_KERNEL_MODE)
#else
// User-defined
cs_malloc_t cs_mem_malloc = NULL;
cs_calloc_t cs_mem_calloc = NULL;
cs_realloc_t cs_mem_realloc = NULL;
cs_free_t cs_mem_free = NULL;
cs_vsnprintf_t cs_vsnprintf = NULL;
#endif // defined(CAPSTONE_USE_SYS_DYN_MEM)
CAPSTONE_EXPORT
unsigned int CAPSTONE_API cs_version(int *major, int *minor)
{
if (major != NULL && minor != NULL) {
*major = CS_API_MAJOR;
*minor = CS_API_MINOR;
}
return (CS_API_MAJOR << 8) + CS_API_MINOR;
}
#define CS_ARCH_REGISTER(id) \
cs_arch_config cfg = CS_ARCH_CONFIG_##id; \
arch_configs[CS_ARCH_##id] = cfg; \
all_arch |= 1 << CS_ARCH_##id
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_arm(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_ARM)
CS_ARCH_REGISTER(ARM);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_aarch64(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_AARCH64)
CS_ARCH_REGISTER(AARCH64);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_mips(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_MIPS)
CS_ARCH_REGISTER(MIPS);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_x86(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_X86)
CS_ARCH_REGISTER(X86);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_powerpc(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_POWERPC)
CS_ARCH_REGISTER(PPC);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_sparc(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_SPARC)
CS_ARCH_REGISTER(SPARC);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_sysz(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_SYSZ)
CS_ARCH_REGISTER(SYSZ);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_xcore(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_XCORE)
CS_ARCH_REGISTER(XCORE);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_m68k(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_M68K)
CS_ARCH_REGISTER(M68K);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_tms320c64x(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_TMS320C64X)
CS_ARCH_REGISTER(TMS320C64X);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_m680x(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_M680X)
CS_ARCH_REGISTER(M680X);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_evm(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_EVM)
CS_ARCH_REGISTER(EVM);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_mos65xx(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_MOS65XX)
CS_ARCH_REGISTER(MOS65XX);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_wasm(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_WASM)
CS_ARCH_REGISTER(WASM);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_bpf(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_BPF)
CS_ARCH_REGISTER(BPF);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_riscv(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_RISCV)
CS_ARCH_REGISTER(RISCV);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_sh(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_SH)
CS_ARCH_REGISTER(SH);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_tricore(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_TRICORE)
CS_ARCH_REGISTER(TRICORE);
#endif
}
CAPSTONE_EXPORT
void CAPSTONE_API cs_arch_register_alpha(void)
{
#if defined(CAPSTONE_USE_ARCH_REGISTRATION) && defined(CAPSTONE_HAS_ALPHA)
CS_ARCH_REGISTER(ALPHA);
#endif
}
CAPSTONE_EXPORT
bool CAPSTONE_API cs_support(int query)
{
if (query == CS_ARCH_ALL)
return all_arch ==
((1 << CS_ARCH_ARM) | (1 << CS_ARCH_AARCH64) |
(1 << CS_ARCH_MIPS) | (1 << CS_ARCH_X86) |
(1 << CS_ARCH_PPC) | (1 << CS_ARCH_SPARC) |
(1 << CS_ARCH_SYSZ) | (1 << CS_ARCH_XCORE) |
(1 << CS_ARCH_M68K) | (1 << CS_ARCH_TMS320C64X) |
(1 << CS_ARCH_M680X) | (1 << CS_ARCH_EVM) |
(1 << CS_ARCH_RISCV) | (1 << CS_ARCH_MOS65XX) |
(1 << CS_ARCH_WASM) | (1 << CS_ARCH_BPF) |
(1 << CS_ARCH_SH) | (1 << CS_ARCH_TRICORE) |
(1 << CS_ARCH_ALPHA));
if ((unsigned int)query < CS_ARCH_MAX)
return all_arch & (1 << query);
if (query == CS_SUPPORT_DIET) {
#ifdef CAPSTONE_DIET
return true;
#else
return false;
#endif
}
if (query == CS_SUPPORT_X86_REDUCE) {
#if defined(CAPSTONE_HAS_X86) && defined(CAPSTONE_X86_REDUCE)
return true;
#else
return false;
#endif
}
// unsupported query
return false;
}
CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_errno(csh handle)
{
struct cs_struct *ud;
if (!handle)
return CS_ERR_CSH;
ud = (struct cs_struct *)(uintptr_t)handle;
return ud->errnum;
}
CAPSTONE_EXPORT
const char * CAPSTONE_API cs_strerror(cs_err code)
{
switch(code) {
default:
return "Unknown error code";
case CS_ERR_OK:
return "OK (CS_ERR_OK)";
case CS_ERR_MEM:
return "Out of memory (CS_ERR_MEM)";
case CS_ERR_ARCH:
return "Invalid/unsupported architecture(CS_ERR_ARCH)";
case CS_ERR_HANDLE:
return "Invalid handle (CS_ERR_HANDLE)";
case CS_ERR_CSH:
return "Invalid csh (CS_ERR_CSH)";
case CS_ERR_MODE:
return "Invalid mode (CS_ERR_MODE)";
case CS_ERR_OPTION:
return "Invalid option (CS_ERR_OPTION)";
case CS_ERR_DETAIL:
return "Details are unavailable (CS_ERR_DETAIL)";
case CS_ERR_MEMSETUP:
return "Dynamic memory management uninitialized (CS_ERR_MEMSETUP)";
case CS_ERR_VERSION:
return "Different API version between core & binding (CS_ERR_VERSION)";
case CS_ERR_DIET:
return "Information irrelevant in diet engine (CS_ERR_DIET)";
case CS_ERR_SKIPDATA:
return "Information irrelevant for 'data' instruction in SKIPDATA mode (CS_ERR_SKIPDATA)";
case CS_ERR_X86_ATT:
return "AT&T syntax is unavailable (CS_ERR_X86_ATT)";
case CS_ERR_X86_INTEL:
return "INTEL syntax is unavailable (CS_ERR_X86_INTEL)";
case CS_ERR_X86_MASM:
return "MASM syntax is unavailable (CS_ERR_X86_MASM)";
}
}
CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_open(cs_arch arch, cs_mode mode, csh *handle)
{
cs_err err;
struct cs_struct *ud;
if (!cs_mem_malloc || !cs_mem_calloc || !cs_mem_realloc || !cs_mem_free || !cs_vsnprintf)
// Error: before cs_open(), dynamic memory management must be initialized
// with cs_option(CS_OPT_MEM)
return CS_ERR_MEMSETUP;
if (arch < CS_ARCH_MAX && arch_configs[arch].arch_init) {
// verify if requested mode is valid
if (mode & arch_configs[arch].arch_disallowed_mode_mask) {
*handle = 0;
return CS_ERR_MODE;
}
ud = cs_mem_calloc(1, sizeof(*ud));
if (!ud) {
// memory insufficient
return CS_ERR_MEM;
}
ud->errnum = CS_ERR_OK;
ud->arch = arch;
ud->mode = mode;
// by default, do not break instruction into details
ud->detail_opt = CS_OPT_OFF;
// default skipdata setup
ud->skipdata_setup.mnemonic = SKIPDATA_MNEM;
err = arch_configs[ud->arch].arch_init(ud);
if (err) {
cs_mem_free(ud);
*handle = 0;
return err;
}
*handle = (uintptr_t)ud;
return CS_ERR_OK;
} else {
*handle = 0;
return CS_ERR_ARCH;
}
}
CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_close(csh *handle)
{
struct cs_struct *ud;
struct insn_mnem *next, *tmp;
if (*handle == 0)
// invalid handle
return CS_ERR_CSH;
ud = (struct cs_struct *)(*handle);
if (ud->printer_info)
cs_mem_free(ud->printer_info);
// free the linked list of customized mnemonic
tmp = ud->mnem_list;
while(tmp) {
next = tmp->next;
cs_mem_free(tmp);
tmp = next;
}
cs_mem_free(ud->insn_cache);
memset(ud, 0, sizeof(*ud));
cs_mem_free(ud);
// invalidate this handle by ZERO out its value.
// this is to make sure it is unusable after cs_close()
*handle = 0;
return CS_ERR_OK;
}
// replace str1 in target with str2; target starts with str1
// output is put into result (which is array of char with size CS_MNEMONIC_SIZE)
// return 0 on success, -1 on failure
#ifndef CAPSTONE_DIET
static int str_replace(char *result, char *target, const char *str1, char *str2)
{
// only perform replacement if the output fits into result
if (strlen(target) - strlen(str1) + strlen(str2) < CS_MNEMONIC_SIZE - 1) {
// copy str2 to begining of result
strcpy(result, str2);
// skip str1 - already replaced by str2
strcat(result, target + strlen(str1));
return 0;
} else
return -1;
}
#endif
/// The asm string sometimes has a leading space or tab.
/// Here we remove it.
static void fixup_asm_string(char *asm_str) {
if (!asm_str) {
return;
}
int i = 0;
int k = 0;
bool text_reached = (asm_str[0] != ' ' && asm_str[0] != '\t');
while (asm_str[i]) {
if (!text_reached && (asm_str[i] == ' ' || asm_str[i] == '\t')) {
++i;
text_reached = true;
continue;
}
asm_str[k] = asm_str[i];
++k, ++i;
}
asm_str[k] = '\0';
}
// fill insn with mnemonic & operands info
static void fill_insn(struct cs_struct *handle, cs_insn *insn, char *buffer, MCInst *mci,
PostPrinter_t postprinter, const uint8_t *code)
{
#ifndef CAPSTONE_DIET
char *sp, *mnem;
#endif
fixup_asm_string(buffer);
uint16_t copy_size = MIN(sizeof(insn->bytes), insn->size);
// fill the instruction bytes.
// we might skip some redundant bytes in front in the case of X86
memcpy(insn->bytes, code + insn->size - copy_size, copy_size);
insn->op_str[0] = '\0';
insn->size = copy_size;
// alias instruction might have ID saved in OpcodePub
if (MCInst_getOpcodePub(mci))
insn->id = MCInst_getOpcodePub(mci);
// post printer handles some corner cases (hacky)
if (postprinter)
postprinter((csh)handle, insn, buffer, mci);
#ifndef CAPSTONE_DIET
mnem = insn->mnemonic;
// memset(mnem, 0, CS_MNEMONIC_SIZE);
for (sp = buffer; *sp; sp++) {
if (*sp == ' '|| *sp == '\t')
break;
if (*sp == '|') // lock|rep prefix for x86
*sp = ' ';
// copy to @mnemonic
*mnem = *sp;
mnem++;
}
*mnem = '\0';
// we might have customized mnemonic
if (handle->mnem_list) {
struct insn_mnem *tmp = handle->mnem_list;
while(tmp) {
if (tmp->insn.id == insn->id) {
char str[CS_MNEMONIC_SIZE];
if (!str_replace(str, insn->mnemonic, cs_insn_name((csh)handle, insn->id), tmp->insn.mnemonic)) {
// copy result to mnemonic
(void)strncpy(insn->mnemonic, str, sizeof(insn->mnemonic) - 1);
insn->mnemonic[sizeof(insn->mnemonic) - 1] = '\0';
}
break;
}
tmp = tmp->next;
}
}
// copy @op_str
if (*sp) {
// find the next non-space char
sp++;
for (; ((*sp == ' ') || (*sp == '\t')); sp++);
strncpy(insn->op_str, sp, sizeof(insn->op_str) - 1);
insn->op_str[sizeof(insn->op_str) - 1] = '\0';
} else
insn->op_str[0] = '\0';
#endif
}
// how many bytes will we skip when encountering data (CS_OPT_SKIPDATA)?
// this very much depends on instruction alignment requirement of each arch.
static uint8_t skipdata_size(cs_struct *handle)
{
switch(handle->arch) {
default:
// should never reach
return (uint8_t)-1;
case CS_ARCH_ARM:
// skip 2 bytes on Thumb mode.
if (handle->mode & CS_MODE_THUMB)
return 2;
// otherwise, skip 4 bytes
return 4;
case CS_ARCH_AARCH64:
case CS_ARCH_MIPS:
case CS_ARCH_PPC:
case CS_ARCH_SPARC:
// skip 4 bytes
return 4;
case CS_ARCH_SYSZ:
// SystemZ instruction's length can be 2, 4 or 6 bytes,
// so we just skip 2 bytes
return 2;
case CS_ARCH_X86:
// X86 has no restriction on instruction alignment
return 1;
case CS_ARCH_XCORE:
// XCore instruction's length can be 2 or 4 bytes,
// so we just skip 2 bytes
return 2;
case CS_ARCH_M68K:
// M68K has 2 bytes instruction alignment but contain multibyte instruction so we skip 2 bytes
return 2;
case CS_ARCH_TMS320C64X:
// TMS320C64x alignment is 4.
return 4;
case CS_ARCH_M680X:
// M680X alignment is 1.
return 1;
case CS_ARCH_EVM:
// EVM alignment is 1.
return 1;
case CS_ARCH_WASM:
//WASM alignment is 1
return 1;
case CS_ARCH_MOS65XX:
// MOS65XX alignment is 1.
return 1;
case CS_ARCH_BPF:
// both classic and extended BPF have alignment 8.
return 8;
case CS_ARCH_RISCV:
// special compress mode
if (handle->mode & CS_MODE_RISCVC)
return 2;
return 4;
case CS_ARCH_SH:
return 2;
case CS_ARCH_TRICORE:
// TriCore instruction's length can be 2 or 4 bytes,
// so we just skip 2 bytes
return 2;
case CS_ARCH_ALPHA:
// Alpha alignment is 4.
return 4;
}
}
CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_option(csh ud, cs_opt_type type, size_t value)
{
struct cs_struct *handle;
cs_opt_mnem *opt;
// cs_option() can be called with NULL handle just for CS_OPT_MEM
// This is supposed to be executed before all other APIs (even cs_open())
if (type == CS_OPT_MEM) {
cs_opt_mem *mem = (cs_opt_mem *)value;
cs_mem_malloc = mem->malloc;
cs_mem_calloc = mem->calloc;
cs_mem_realloc = mem->realloc;
cs_mem_free = mem->free;
cs_vsnprintf = mem->vsnprintf;
return CS_ERR_OK;
}
handle = (struct cs_struct *)(uintptr_t)ud;
if (!handle)
return CS_ERR_CSH;
switch(type) {
default:
break;
case CS_OPT_UNSIGNED:
handle->imm_unsigned = (cs_opt_value)value;
return CS_ERR_OK;
case CS_OPT_DETAIL:
handle->detail_opt |= (cs_opt_value)value;
return CS_ERR_OK;
case CS_OPT_SKIPDATA:
handle->skipdata = (value == CS_OPT_ON);
if (handle->skipdata) {
if (handle->skipdata_size == 0) {
// set the default skipdata size
handle->skipdata_size = skipdata_size(handle);
}
}
return CS_ERR_OK;
case CS_OPT_SKIPDATA_SETUP:
if (value) {
handle->skipdata_setup = *((cs_opt_skipdata *)value);
if (handle->skipdata_setup.mnemonic == NULL) {
handle->skipdata_setup.mnemonic = SKIPDATA_MNEM;
}
}
return CS_ERR_OK;
case CS_OPT_MNEMONIC: