1135 lines
27 KiB
C
1135 lines
27 KiB
C
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/* Capstone Disassembly Engine */
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/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2014 */
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#if defined (WIN32) || defined (WIN64) || defined (_WIN32) || defined (_WIN64)
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#pragma warning(disable:4996) // disable MSVC's warning on strcpy()
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#pragma warning(disable:28719) // disable MSVC's warning on strcpy()
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#endif
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#if defined(CAPSTONE_HAS_OSXKERNEL)
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#include <libkern/libkern.h>
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#else
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#endif
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#include <string.h>
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#include <capstone.h>
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#include "utils.h"
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#include "MCRegisterInfo.h"
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#if defined(_KERNEL_MODE)
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#include "windows\winkernel_mm.h"
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#endif
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// Issue #681: Windows kernel does not support formatting float point
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#if defined(_KERNEL_MODE) && !defined(CAPSTONE_DIET)
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#if defined(CAPSTONE_HAS_ARM) || defined(CAPSTONE_HAS_ARM64)
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#define CAPSTONE_STR_INTERNAL(x) #x
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#define CAPSTONE_STR(x) CAPSTONE_STR_INTERNAL(x)
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#define CAPSTONE_MSVC_WRANING_PREFIX __FILE__ "("CAPSTONE_STR(__LINE__)") : warning message : "
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#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.")
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#undef CAPSTONE_MSVC_WRANING_PREFIX
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#undef CAPSTONE_STR
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#undef CAPSTONE_STR_INTERNAL
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#endif
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#endif // defined(_KERNEL_MODE) && !defined(CAPSTONE_DIET)
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#if !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(CAPSTONE_DIET) && !defined(_KERNEL_MODE)
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#define INSN_CACHE_SIZE 32
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#else
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// reduce stack variable size for kernel/firmware
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#define INSN_CACHE_SIZE 8
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#endif
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// default SKIPDATA mnemonic
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#ifndef CAPSTONE_DIET
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#define SKIPDATA_MNEM ".byte"
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#else // No printing is available in diet mode
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#define SKIPDATA_MNEM NULL
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#endif
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cs_err (*arch_init[MAX_ARCH])(cs_struct *) = { NULL };
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cs_err (*arch_option[MAX_ARCH]) (cs_struct *, cs_opt_type, size_t value) = { NULL };
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void (*arch_destroy[MAX_ARCH]) (cs_struct *) = { NULL };
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cs_mode arch_disallowed_mode_mask[MAX_ARCH] = { 0 };
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extern void ARM_enable(void);
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extern void AArch64_enable(void);
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extern void Mips_enable(void);
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extern void X86_enable(void);
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extern void PPC_enable(void);
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extern void Sparc_enable(void);
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extern void SystemZ_enable(void);
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extern void XCore_enable(void);
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static void archs_enable(void)
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{
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static bool initialized = false;
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if (initialized)
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return;
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#ifdef CAPSTONE_HAS_ARM
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ARM_enable();
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#endif
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#ifdef CAPSTONE_HAS_ARM64
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AArch64_enable();
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#endif
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#ifdef CAPSTONE_HAS_MIPS
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Mips_enable();
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#endif
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#ifdef CAPSTONE_HAS_POWERPC
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PPC_enable();
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#endif
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#ifdef CAPSTONE_HAS_SPARC
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Sparc_enable();
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#endif
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#ifdef CAPSTONE_HAS_SYSZ
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SystemZ_enable();
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#endif
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#ifdef CAPSTONE_HAS_X86
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X86_enable();
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#endif
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#ifdef CAPSTONE_HAS_XCORE
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XCore_enable();
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#endif
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initialized = true;
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}
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unsigned int all_arch = 0;
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#if defined(CAPSTONE_USE_SYS_DYN_MEM)
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#if !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(_KERNEL_MODE)
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cs_malloc_t cs_mem_malloc = malloc;
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cs_calloc_t cs_mem_calloc = calloc;
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cs_realloc_t cs_mem_realloc = realloc;
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cs_free_t cs_mem_free = free;
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cs_vsnprintf_t cs_vsnprintf = vsnprintf;
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#elif defined(_KERNEL_MODE)
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cs_malloc_t cs_mem_malloc = cs_winkernel_malloc;
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cs_calloc_t cs_mem_calloc = cs_winkernel_calloc;
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cs_realloc_t cs_mem_realloc = cs_winkernel_realloc;
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cs_free_t cs_mem_free = cs_winkernel_free;
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cs_vsnprintf_t cs_vsnprintf = cs_winkernel_vsnprintf;
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#else
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extern void* kern_os_malloc(size_t size);
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extern void kern_os_free(void* addr);
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extern void* kern_os_realloc(void* addr, size_t nsize);
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static void* cs_kern_os_calloc(size_t num, size_t size)
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{
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return kern_os_malloc(num * size); // malloc bzeroes the buffer
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}
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cs_malloc_t cs_mem_malloc = kern_os_malloc;
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cs_calloc_t cs_mem_calloc = cs_kern_os_calloc;
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cs_realloc_t cs_mem_realloc = kern_os_realloc;
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cs_free_t cs_mem_free = kern_os_free;
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cs_vsnprintf_t cs_vsnprintf = vsnprintf;
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#endif
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#else
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cs_malloc_t cs_mem_malloc = NULL;
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cs_calloc_t cs_mem_calloc = NULL;
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cs_realloc_t cs_mem_realloc = NULL;
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cs_free_t cs_mem_free = NULL;
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cs_vsnprintf_t cs_vsnprintf = NULL;
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#endif
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CAPSTONE_EXPORT
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unsigned int CAPSTONE_API cs_version(int *major, int *minor)
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{
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archs_enable();
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if (major != NULL && minor != NULL) {
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*major = CS_API_MAJOR;
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*minor = CS_API_MINOR;
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}
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return (CS_API_MAJOR << 8) + CS_API_MINOR;
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}
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CAPSTONE_EXPORT
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bool CAPSTONE_API cs_support(int query)
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{
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archs_enable();
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if (query == CS_ARCH_ALL)
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return all_arch == ((1 << CS_ARCH_ARM) | (1 << CS_ARCH_ARM64) |
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(1 << CS_ARCH_MIPS) | (1 << CS_ARCH_X86) |
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(1 << CS_ARCH_PPC) | (1 << CS_ARCH_SPARC) |
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(1 << CS_ARCH_SYSZ) | (1 << CS_ARCH_XCORE));
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if ((unsigned int)query < CS_ARCH_MAX)
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return all_arch & (1 << query);
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if (query == CS_SUPPORT_DIET) {
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#ifdef CAPSTONE_DIET
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return true;
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#else
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return false;
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#endif
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}
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if (query == CS_SUPPORT_X86_REDUCE) {
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#if defined(CAPSTONE_HAS_X86) && defined(CAPSTONE_X86_REDUCE)
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return true;
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#else
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return false;
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#endif
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}
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// unsupported query
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return false;
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}
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CAPSTONE_EXPORT
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cs_err CAPSTONE_API cs_errno(csh handle)
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{
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struct cs_struct *ud;
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if (!handle)
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return CS_ERR_CSH;
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ud = (struct cs_struct *)(uintptr_t)handle;
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return ud->errnum;
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}
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CAPSTONE_EXPORT
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const char * CAPSTONE_API cs_strerror(cs_err code)
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{
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switch(code) {
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default:
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return "Unknown error code";
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case CS_ERR_OK:
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return "OK (CS_ERR_OK)";
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case CS_ERR_MEM:
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return "Out of memory (CS_ERR_MEM)";
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case CS_ERR_ARCH:
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return "Invalid architecture (CS_ERR_ARCH)";
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case CS_ERR_HANDLE:
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return "Invalid handle (CS_ERR_HANDLE)";
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case CS_ERR_CSH:
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return "Invalid csh (CS_ERR_CSH)";
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case CS_ERR_MODE:
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return "Invalid mode (CS_ERR_MODE)";
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case CS_ERR_OPTION:
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return "Invalid option (CS_ERR_OPTION)";
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case CS_ERR_DETAIL:
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return "Details are unavailable (CS_ERR_DETAIL)";
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case CS_ERR_MEMSETUP:
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return "Dynamic memory management uninitialized (CS_ERR_MEMSETUP)";
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case CS_ERR_VERSION:
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return "Different API version between core & binding (CS_ERR_VERSION)";
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case CS_ERR_DIET:
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return "Information irrelevant in diet engine (CS_ERR_DIET)";
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case CS_ERR_SKIPDATA:
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return "Information irrelevant for 'data' instruction in SKIPDATA mode (CS_ERR_SKIPDATA)";
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}
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}
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CAPSTONE_EXPORT
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cs_err CAPSTONE_API cs_open(cs_arch arch, cs_mode mode, csh *handle)
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{
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cs_err err;
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struct cs_struct *ud;
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if (!cs_mem_malloc || !cs_mem_calloc || !cs_mem_realloc || !cs_mem_free || !cs_vsnprintf)
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// Error: before cs_open(), dynamic memory management must be initialized
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// with cs_option(CS_OPT_MEM)
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return CS_ERR_MEMSETUP;
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archs_enable();
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if (arch < CS_ARCH_MAX && arch_init[arch]) {
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// verify if requested mode is valid
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if (mode & arch_disallowed_mode_mask[arch]) {
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*handle = 0;
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return CS_ERR_MODE;
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}
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ud = cs_mem_calloc(1, sizeof(*ud));
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if (!ud) {
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// memory insufficient
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return CS_ERR_MEM;
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}
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ud->errnum = CS_ERR_OK;
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ud->arch = arch;
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ud->mode = mode;
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// by default, do not break instruction into details
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ud->detail = CS_OPT_OFF;
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// default skipdata setup
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ud->skipdata_setup.mnemonic = SKIPDATA_MNEM;
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err = arch_init[ud->arch](ud);
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if (err) {
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cs_mem_free(ud);
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*handle = 0;
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return err;
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}
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*handle = (uintptr_t)ud;
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return CS_ERR_OK;
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} else {
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*handle = 0;
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return CS_ERR_ARCH;
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}
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}
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CAPSTONE_EXPORT
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cs_err CAPSTONE_API cs_close(csh *handle)
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{
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struct cs_struct *ud;
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if (*handle == 0)
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// invalid handle
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return CS_ERR_CSH;
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ud = (struct cs_struct *)(*handle);
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if (ud->printer_info)
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cs_mem_free(ud->printer_info);
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cs_mem_free(ud->insn_cache);
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memset(ud, 0, sizeof(*ud));
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cs_mem_free(ud);
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// invalidate this handle by ZERO out its value.
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// this is to make sure it is unusable after cs_close()
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*handle = 0;
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return CS_ERR_OK;
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}
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// fill insn with mnemonic & operands info
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static void fill_insn(struct cs_struct *handle, cs_insn *insn, char *buffer, MCInst *mci,
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PostPrinter_t postprinter, const uint8_t *code)
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{
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#ifndef CAPSTONE_DIET
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char *sp, *mnem;
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#endif
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uint16_t copy_size = MIN(sizeof(insn->bytes), insn->size);
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// fill the instruction bytes.
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// we might skip some redundant bytes in front in the case of X86
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memcpy(insn->bytes, code + insn->size - copy_size, copy_size);
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insn->size = copy_size;
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// alias instruction might have ID saved in OpcodePub
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if (MCInst_getOpcodePub(mci))
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insn->id = MCInst_getOpcodePub(mci);
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// post printer handles some corner cases (hacky)
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if (postprinter)
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postprinter((csh)handle, insn, buffer, mci);
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#ifndef CAPSTONE_DIET
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// fill in mnemonic & operands
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// find first space or tab
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mnem = insn->mnemonic;
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for (sp = buffer; *sp; sp++) {
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if (*sp == ' '|| *sp == '\t')
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break;
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if (*sp == '|') // lock|rep prefix for x86
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*sp = ' ';
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// copy to @mnemonic
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*mnem = *sp;
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mnem++;
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}
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*mnem = '\0';
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// copy @op_str
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if (*sp) {
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// find the next non-space char
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sp++;
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for (; ((*sp == ' ') || (*sp == '\t')); sp++);
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strncpy(insn->op_str, sp, sizeof(insn->op_str) - 1);
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insn->op_str[sizeof(insn->op_str) - 1] = '\0';
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} else
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insn->op_str[0] = '\0';
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#endif
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}
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// how many bytes will we skip when encountering data (CS_OPT_SKIPDATA)?
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// this very much depends on instruction alignment requirement of each arch.
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static uint8_t skipdata_size(cs_struct *handle)
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{
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switch(handle->arch) {
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default:
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// should never reach
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return (uint8_t)-1;
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case CS_ARCH_ARM:
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// skip 2 bytes on Thumb mode.
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if (handle->mode & CS_MODE_THUMB)
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return 2;
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// otherwise, skip 4 bytes
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return 4;
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case CS_ARCH_ARM64:
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case CS_ARCH_MIPS:
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case CS_ARCH_PPC:
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case CS_ARCH_SPARC:
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// skip 4 bytes
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return 4;
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case CS_ARCH_SYSZ:
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// SystemZ instruction's length can be 2, 4 or 6 bytes,
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// so we just skip 2 bytes
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return 2;
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case CS_ARCH_X86:
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// X86 has no restriction on instruction alignment
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return 1;
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case CS_ARCH_XCORE:
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// XCore instruction's length can be 2 or 4 bytes,
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// so we just skip 2 bytes
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return 2;
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}
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}
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CAPSTONE_EXPORT
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cs_err CAPSTONE_API cs_option(csh ud, cs_opt_type type, size_t value)
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{
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struct cs_struct *handle;
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archs_enable();
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// cs_option() can be called with NULL handle just for CS_OPT_MEM
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// This is supposed to be executed before all other APIs (even cs_open())
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if (type == CS_OPT_MEM) {
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cs_opt_mem *mem = (cs_opt_mem *)value;
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cs_mem_malloc = mem->malloc;
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cs_mem_calloc = mem->calloc;
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cs_mem_realloc = mem->realloc;
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cs_mem_free = mem->free;
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cs_vsnprintf = mem->vsnprintf;
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return CS_ERR_OK;
|
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}
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handle = (struct cs_struct *)(uintptr_t)ud;
|
||
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if (!handle)
|
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return CS_ERR_CSH;
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||
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|
||
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switch(type) {
|
||
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default:
|
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break;
|
||
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case CS_OPT_DETAIL:
|
||
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handle->detail = (cs_opt_value)value;
|
||
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return CS_ERR_OK;
|
||
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case CS_OPT_SKIPDATA:
|
||
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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);
|
||
|
return CS_ERR_OK;
|
||
|
case CS_OPT_MODE:
|
||
|
// verify if requested mode is valid
|
||
|
if (value & arch_disallowed_mode_mask[handle->arch]) {
|
||
|
return CS_ERR_OPTION;
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return arch_option[handle->arch](handle, type, value);
|
||
|
}
|
||
|
|
||
|
// generate @op_str for data instruction of SKIPDATA
|
||
|
#ifndef CAPSTONE_DIET
|
||
|
static void skipdata_opstr(char *opstr, const uint8_t *buffer, size_t size)
|
||
|
{
|
||
|
char *p = opstr;
|
||
|
int len;
|
||
|
size_t i;
|
||
|
size_t available = sizeof(((cs_insn*)NULL)->op_str);
|
||
|
|
||
|
if (!size) {
|
||
|
opstr[0] = '\0';
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
len = cs_snprintf(p, available, "0x%02x", buffer[0]);
|
||
|
p+= len;
|
||
|
available -= len;
|
||
|
|
||
|
for(i = 1; i < size; i++) {
|
||
|
len = cs_snprintf(p, available, ", 0x%02x", buffer[i]);
|
||
|
if (len < 0) {
|
||
|
break;
|
||
|
}
|
||
|
if ((size_t)len > available - 1) {
|
||
|
break;
|
||
|
}
|
||
|
p+= len;
|
||
|
available -= len;
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
// dynamicly allocate memory to contain disasm insn
|
||
|
// NOTE: caller must free() the allocated memory itself to avoid memory leaking
|
||
|
CAPSTONE_EXPORT
|
||
|
size_t CAPSTONE_API cs_disasm(csh ud, const uint8_t *buffer, size_t size, uint64_t offset, size_t count, cs_insn **insn)
|
||
|
{
|
||
|
struct cs_struct *handle;
|
||
|
MCInst mci;
|
||
|
uint16_t insn_size;
|
||
|
size_t c = 0, i;
|
||
|
unsigned int f = 0; // index of the next instruction in the cache
|
||
|
cs_insn *insn_cache; // cache contains disassembled instructions
|
||
|
void *total = NULL;
|
||
|
size_t total_size = 0; // total size of output buffer containing all insns
|
||
|
bool r;
|
||
|
void *tmp;
|
||
|
size_t skipdata_bytes;
|
||
|
uint64_t offset_org; // save all the original info of the buffer
|
||
|
size_t size_org;
|
||
|
const uint8_t *buffer_org;
|
||
|
unsigned int cache_size = INSN_CACHE_SIZE;
|
||
|
size_t next_offset;
|
||
|
|
||
|
handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
if (!handle) {
|
||
|
// FIXME: how to handle this case:
|
||
|
// handle->errnum = CS_ERR_HANDLE;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
handle->errnum = CS_ERR_OK;
|
||
|
|
||
|
// reset IT block of ARM structure
|
||
|
if (handle->arch == CS_ARCH_ARM)
|
||
|
handle->ITBlock.size = 0;
|
||
|
|
||
|
#ifdef CAPSTONE_USE_SYS_DYN_MEM
|
||
|
if (count > 0 && count <= INSN_CACHE_SIZE)
|
||
|
cache_size = (unsigned int) count;
|
||
|
#endif
|
||
|
|
||
|
// save the original offset for SKIPDATA
|
||
|
buffer_org = buffer;
|
||
|
offset_org = offset;
|
||
|
size_org = size;
|
||
|
|
||
|
total_size = sizeof(cs_insn) * cache_size;
|
||
|
total = cs_mem_malloc(total_size);
|
||
|
if (total == NULL) {
|
||
|
// insufficient memory
|
||
|
handle->errnum = CS_ERR_MEM;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
insn_cache = total;
|
||
|
|
||
|
while (size > 0) {
|
||
|
MCInst_Init(&mci);
|
||
|
mci.csh = handle;
|
||
|
|
||
|
// relative branches need to know the address & size of current insn
|
||
|
mci.address = offset;
|
||
|
|
||
|
if (handle->detail) {
|
||
|
// allocate memory for @detail pointer
|
||
|
insn_cache->detail = cs_mem_malloc(sizeof(cs_detail));
|
||
|
} else {
|
||
|
insn_cache->detail = NULL;
|
||
|
}
|
||
|
|
||
|
// save all the information for non-detailed mode
|
||
|
mci.flat_insn = insn_cache;
|
||
|
mci.flat_insn->address = offset;
|
||
|
#ifdef CAPSTONE_DIET
|
||
|
// zero out mnemonic & op_str
|
||
|
mci.flat_insn->mnemonic[0] = '\0';
|
||
|
mci.flat_insn->op_str[0] = '\0';
|
||
|
#endif
|
||
|
|
||
|
r = handle->disasm(ud, buffer, size, &mci, &insn_size, offset, handle->getinsn_info);
|
||
|
if (r) {
|
||
|
SStream ss;
|
||
|
SStream_Init(&ss);
|
||
|
|
||
|
mci.flat_insn->size = insn_size;
|
||
|
|
||
|
// map internal instruction opcode to public insn ID
|
||
|
|
||
|
handle->insn_id(handle, insn_cache, mci.Opcode);
|
||
|
|
||
|
handle->printer(&mci, &ss, handle->printer_info);
|
||
|
|
||
|
fill_insn(handle, insn_cache, ss.buffer, &mci, handle->post_printer, buffer);
|
||
|
|
||
|
next_offset = insn_size;
|
||
|
} else {
|
||
|
// encounter a broken instruction
|
||
|
|
||
|
// free memory of @detail pointer
|
||
|
if (handle->detail) {
|
||
|
cs_mem_free(insn_cache->detail);
|
||
|
}
|
||
|
|
||
|
// if there is no request to skip data, or remaining data is too small,
|
||
|
// then bail out
|
||
|
if (!handle->skipdata || handle->skipdata_size > size)
|
||
|
break;
|
||
|
|
||
|
if (handle->skipdata_setup.callback) {
|
||
|
skipdata_bytes = handle->skipdata_setup.callback(buffer_org, size_org,
|
||
|
(size_t)(offset - offset_org), handle->skipdata_setup.user_data);
|
||
|
if (skipdata_bytes > size)
|
||
|
// remaining data is not enough
|
||
|
break;
|
||
|
|
||
|
if (!skipdata_bytes)
|
||
|
// user requested not to skip data, so bail out
|
||
|
break;
|
||
|
} else
|
||
|
skipdata_bytes = handle->skipdata_size;
|
||
|
|
||
|
// we have to skip some amount of data, depending on arch & mode
|
||
|
insn_cache->id = 0; // invalid ID for this "data" instruction
|
||
|
insn_cache->address = offset;
|
||
|
insn_cache->size = (uint16_t)skipdata_bytes;
|
||
|
memcpy(insn_cache->bytes, buffer, skipdata_bytes);
|
||
|
#ifdef CAPSTONE_DIET
|
||
|
insn_cache->mnemonic[0] = '\0';
|
||
|
insn_cache->op_str[0] = '\0';
|
||
|
#else
|
||
|
strncpy(insn_cache->mnemonic, handle->skipdata_setup.mnemonic,
|
||
|
sizeof(insn_cache->mnemonic) - 1);
|
||
|
skipdata_opstr(insn_cache->op_str, buffer, skipdata_bytes);
|
||
|
#endif
|
||
|
insn_cache->detail = NULL;
|
||
|
|
||
|
next_offset = skipdata_bytes;
|
||
|
}
|
||
|
|
||
|
// one more instruction entering the cache
|
||
|
f++;
|
||
|
|
||
|
// one more instruction disassembled
|
||
|
c++;
|
||
|
if (count > 0 && c == count)
|
||
|
// already got requested number of instructions
|
||
|
break;
|
||
|
|
||
|
if (f == cache_size) {
|
||
|
// full cache, so expand the cache to contain incoming insns
|
||
|
cache_size = cache_size * 8 / 5; // * 1.6 ~ golden ratio
|
||
|
total_size += (sizeof(cs_insn) * cache_size);
|
||
|
tmp = cs_mem_realloc(total, total_size);
|
||
|
if (tmp == NULL) { // insufficient memory
|
||
|
if (handle->detail) {
|
||
|
insn_cache = (cs_insn *)total;
|
||
|
for (i = 0; i < c; i++, insn_cache++)
|
||
|
cs_mem_free(insn_cache->detail);
|
||
|
}
|
||
|
|
||
|
cs_mem_free(total);
|
||
|
*insn = NULL;
|
||
|
handle->errnum = CS_ERR_MEM;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
total = tmp;
|
||
|
// continue to fill in the cache after the last instruction
|
||
|
insn_cache = (cs_insn *)((char *)total + sizeof(cs_insn) * c);
|
||
|
|
||
|
// reset f back to 0, so we fill in the cache from begining
|
||
|
f = 0;
|
||
|
} else
|
||
|
insn_cache++;
|
||
|
|
||
|
buffer += next_offset;
|
||
|
size -= next_offset;
|
||
|
offset += next_offset;
|
||
|
}
|
||
|
|
||
|
if (!c) {
|
||
|
// we did not disassemble any instruction
|
||
|
cs_mem_free(total);
|
||
|
total = NULL;
|
||
|
} else if (f != cache_size) {
|
||
|
// total did not fully use the last cache, so downsize it
|
||
|
tmp = cs_mem_realloc(total, total_size - (cache_size - f) * sizeof(*insn_cache));
|
||
|
if (tmp == NULL) { // insufficient memory
|
||
|
// free all detail pointers
|
||
|
if (handle->detail) {
|
||
|
insn_cache = (cs_insn *)total;
|
||
|
for (i = 0; i < c; i++, insn_cache++)
|
||
|
cs_mem_free(insn_cache->detail);
|
||
|
}
|
||
|
|
||
|
cs_mem_free(total);
|
||
|
*insn = NULL;
|
||
|
|
||
|
handle->errnum = CS_ERR_MEM;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
total = tmp;
|
||
|
}
|
||
|
|
||
|
*insn = total;
|
||
|
|
||
|
return c;
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
CAPSTONE_DEPRECATED
|
||
|
size_t CAPSTONE_API cs_disasm_ex(csh ud, const uint8_t *buffer, size_t size, uint64_t offset, size_t count, cs_insn **insn)
|
||
|
{
|
||
|
return cs_disasm(ud, buffer, size, offset, count, insn);
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
void CAPSTONE_API cs_free(cs_insn *insn, size_t count)
|
||
|
{
|
||
|
size_t i;
|
||
|
|
||
|
// free all detail pointers
|
||
|
for (i = 0; i < count; i++)
|
||
|
cs_mem_free(insn[i].detail);
|
||
|
|
||
|
// then free pointer to cs_insn array
|
||
|
cs_mem_free(insn);
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
cs_insn * CAPSTONE_API cs_malloc(csh ud)
|
||
|
{
|
||
|
cs_insn *insn;
|
||
|
struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
insn = cs_mem_malloc(sizeof(cs_insn));
|
||
|
if (!insn) {
|
||
|
// insufficient memory
|
||
|
handle->errnum = CS_ERR_MEM;
|
||
|
return NULL;
|
||
|
} else {
|
||
|
if (handle->detail) {
|
||
|
// allocate memory for @detail pointer
|
||
|
insn->detail = cs_mem_malloc(sizeof(cs_detail));
|
||
|
if (insn->detail == NULL) { // insufficient memory
|
||
|
cs_mem_free(insn);
|
||
|
handle->errnum = CS_ERR_MEM;
|
||
|
return NULL;
|
||
|
}
|
||
|
} else
|
||
|
insn->detail = NULL;
|
||
|
}
|
||
|
|
||
|
return insn;
|
||
|
}
|
||
|
|
||
|
// iterator for instruction "single-stepping"
|
||
|
CAPSTONE_EXPORT
|
||
|
bool CAPSTONE_API cs_disasm_iter(csh ud, const uint8_t **code, size_t *size,
|
||
|
uint64_t *address, cs_insn *insn)
|
||
|
{
|
||
|
struct cs_struct *handle;
|
||
|
uint16_t insn_size;
|
||
|
MCInst mci;
|
||
|
bool r;
|
||
|
|
||
|
handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
if (!handle) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
handle->errnum = CS_ERR_OK;
|
||
|
|
||
|
MCInst_Init(&mci);
|
||
|
mci.csh = handle;
|
||
|
|
||
|
// relative branches need to know the address & size of current insn
|
||
|
mci.address = *address;
|
||
|
|
||
|
// save all the information for non-detailed mode
|
||
|
mci.flat_insn = insn;
|
||
|
mci.flat_insn->address = *address;
|
||
|
#ifdef CAPSTONE_DIET
|
||
|
// zero out mnemonic & op_str
|
||
|
mci.flat_insn->mnemonic[0] = '\0';
|
||
|
mci.flat_insn->op_str[0] = '\0';
|
||
|
#endif
|
||
|
|
||
|
r = handle->disasm(ud, *code, *size, &mci, &insn_size, *address, handle->getinsn_info);
|
||
|
if (r) {
|
||
|
SStream ss;
|
||
|
SStream_Init(&ss);
|
||
|
|
||
|
mci.flat_insn->size = insn_size;
|
||
|
|
||
|
// map internal instruction opcode to public insn ID
|
||
|
handle->insn_id(handle, insn, mci.Opcode);
|
||
|
|
||
|
handle->printer(&mci, &ss, handle->printer_info);
|
||
|
|
||
|
fill_insn(handle, insn, ss.buffer, &mci, handle->post_printer, *code);
|
||
|
|
||
|
*code += insn_size;
|
||
|
*size -= insn_size;
|
||
|
*address += insn_size;
|
||
|
} else { // encounter a broken instruction
|
||
|
size_t skipdata_bytes;
|
||
|
|
||
|
// if there is no request to skip data, or remaining data is too small,
|
||
|
// then bail out
|
||
|
if (!handle->skipdata || handle->skipdata_size > *size)
|
||
|
return false;
|
||
|
|
||
|
if (handle->skipdata_setup.callback) {
|
||
|
skipdata_bytes = handle->skipdata_setup.callback(*code, *size,
|
||
|
0, handle->skipdata_setup.user_data);
|
||
|
if (skipdata_bytes > *size)
|
||
|
// remaining data is not enough
|
||
|
return false;
|
||
|
|
||
|
if (!skipdata_bytes)
|
||
|
// user requested not to skip data, so bail out
|
||
|
return false;
|
||
|
} else
|
||
|
skipdata_bytes = handle->skipdata_size;
|
||
|
|
||
|
// we have to skip some amount of data, depending on arch & mode
|
||
|
insn->id = 0; // invalid ID for this "data" instruction
|
||
|
insn->address = *address;
|
||
|
insn->size = (uint16_t)skipdata_bytes;
|
||
|
memcpy(insn->bytes, *code, skipdata_bytes);
|
||
|
#ifdef CAPSTONE_DIET
|
||
|
insn->mnemonic[0] = '\0';
|
||
|
insn->op_str[0] = '\0';
|
||
|
#else
|
||
|
strncpy(insn->mnemonic, handle->skipdata_setup.mnemonic,
|
||
|
sizeof(insn->mnemonic) - 1);
|
||
|
skipdata_opstr(insn->op_str, *code, skipdata_bytes);
|
||
|
#endif
|
||
|
|
||
|
*code += skipdata_bytes;
|
||
|
*size -= skipdata_bytes;
|
||
|
*address += skipdata_bytes;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
// return friendly name of regiser in a string
|
||
|
CAPSTONE_EXPORT
|
||
|
const char * CAPSTONE_API cs_reg_name(csh ud, unsigned int reg)
|
||
|
{
|
||
|
struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle || handle->reg_name == NULL) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
return handle->reg_name(ud, reg);
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
const char * CAPSTONE_API cs_insn_name(csh ud, unsigned int insn)
|
||
|
{
|
||
|
struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle || handle->insn_name == NULL) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
return handle->insn_name(ud, insn);
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
const char * CAPSTONE_API cs_group_name(csh ud, unsigned int group)
|
||
|
{
|
||
|
struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle || handle->group_name == NULL) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
return handle->group_name(ud, group);
|
||
|
}
|
||
|
|
||
|
static bool arr_exist(unsigned char *arr, unsigned char max, unsigned int id)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < max; i++) {
|
||
|
if (arr[i] == id)
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
bool CAPSTONE_API cs_insn_group(csh ud, const cs_insn *insn, unsigned int group_id)
|
||
|
{
|
||
|
struct cs_struct *handle;
|
||
|
if (!ud)
|
||
|
return false;
|
||
|
|
||
|
handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if(!insn->id) {
|
||
|
handle->errnum = CS_ERR_SKIPDATA;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if(!insn->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return arr_exist(insn->detail->groups, insn->detail->groups_count, group_id);
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
bool CAPSTONE_API cs_reg_read(csh ud, const cs_insn *insn, unsigned int reg_id)
|
||
|
{
|
||
|
struct cs_struct *handle;
|
||
|
if (!ud)
|
||
|
return false;
|
||
|
|
||
|
handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if(!insn->id) {
|
||
|
handle->errnum = CS_ERR_SKIPDATA;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if(!insn->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return arr_exist(insn->detail->regs_read, insn->detail->regs_read_count, reg_id);
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
bool CAPSTONE_API cs_reg_write(csh ud, const cs_insn *insn, unsigned int reg_id)
|
||
|
{
|
||
|
struct cs_struct *handle;
|
||
|
if (!ud)
|
||
|
return false;
|
||
|
|
||
|
handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if(!insn->id) {
|
||
|
handle->errnum = CS_ERR_SKIPDATA;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if(!insn->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return arr_exist(insn->detail->regs_write, insn->detail->regs_write_count, reg_id);
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
int CAPSTONE_API cs_op_count(csh ud, const cs_insn *insn, unsigned int op_type)
|
||
|
{
|
||
|
struct cs_struct *handle;
|
||
|
unsigned int count = 0, i;
|
||
|
if (!ud)
|
||
|
return -1;
|
||
|
|
||
|
handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
if(!insn->id) {
|
||
|
handle->errnum = CS_ERR_SKIPDATA;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
if(!insn->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
handle->errnum = CS_ERR_OK;
|
||
|
|
||
|
switch (handle->arch) {
|
||
|
default:
|
||
|
handle->errnum = CS_ERR_HANDLE;
|
||
|
return -1;
|
||
|
case CS_ARCH_ARM:
|
||
|
for (i = 0; i < insn->detail->arm.op_count; i++)
|
||
|
if (insn->detail->arm.operands[i].type == (arm_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
case CS_ARCH_ARM64:
|
||
|
for (i = 0; i < insn->detail->arm64.op_count; i++)
|
||
|
if (insn->detail->arm64.operands[i].type == (arm64_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
case CS_ARCH_X86:
|
||
|
for (i = 0; i < insn->detail->x86.op_count; i++)
|
||
|
if (insn->detail->x86.operands[i].type == (x86_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
case CS_ARCH_MIPS:
|
||
|
for (i = 0; i < insn->detail->mips.op_count; i++)
|
||
|
if (insn->detail->mips.operands[i].type == (mips_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
case CS_ARCH_PPC:
|
||
|
for (i = 0; i < insn->detail->ppc.op_count; i++)
|
||
|
if (insn->detail->ppc.operands[i].type == (ppc_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
case CS_ARCH_SPARC:
|
||
|
for (i = 0; i < insn->detail->sparc.op_count; i++)
|
||
|
if (insn->detail->sparc.operands[i].type == (sparc_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
case CS_ARCH_SYSZ:
|
||
|
for (i = 0; i < insn->detail->sysz.op_count; i++)
|
||
|
if (insn->detail->sysz.operands[i].type == (sysz_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
case CS_ARCH_XCORE:
|
||
|
for (i = 0; i < insn->detail->xcore.op_count; i++)
|
||
|
if (insn->detail->xcore.operands[i].type == (xcore_op_type)op_type)
|
||
|
count++;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return count;
|
||
|
}
|
||
|
|
||
|
CAPSTONE_EXPORT
|
||
|
int CAPSTONE_API cs_op_index(csh ud, const cs_insn *insn, unsigned int op_type,
|
||
|
unsigned int post)
|
||
|
{
|
||
|
struct cs_struct *handle;
|
||
|
unsigned int count = 0, i;
|
||
|
if (!ud)
|
||
|
return -1;
|
||
|
|
||
|
handle = (struct cs_struct *)(uintptr_t)ud;
|
||
|
|
||
|
if (!handle->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
if(!insn->id) {
|
||
|
handle->errnum = CS_ERR_SKIPDATA;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
if(!insn->detail) {
|
||
|
handle->errnum = CS_ERR_DETAIL;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
handle->errnum = CS_ERR_OK;
|
||
|
|
||
|
switch (handle->arch) {
|
||
|
default:
|
||
|
handle->errnum = CS_ERR_HANDLE;
|
||
|
return -1;
|
||
|
case CS_ARCH_ARM:
|
||
|
for (i = 0; i < insn->detail->arm.op_count; i++) {
|
||
|
if (insn->detail->arm.operands[i].type == (arm_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
case CS_ARCH_ARM64:
|
||
|
for (i = 0; i < insn->detail->arm64.op_count; i++) {
|
||
|
if (insn->detail->arm64.operands[i].type == (arm64_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
case CS_ARCH_X86:
|
||
|
for (i = 0; i < insn->detail->x86.op_count; i++) {
|
||
|
if (insn->detail->x86.operands[i].type == (x86_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
case CS_ARCH_MIPS:
|
||
|
for (i = 0; i < insn->detail->mips.op_count; i++) {
|
||
|
if (insn->detail->mips.operands[i].type == (mips_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
case CS_ARCH_PPC:
|
||
|
for (i = 0; i < insn->detail->ppc.op_count; i++) {
|
||
|
if (insn->detail->ppc.operands[i].type == (ppc_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
case CS_ARCH_SPARC:
|
||
|
for (i = 0; i < insn->detail->sparc.op_count; i++) {
|
||
|
if (insn->detail->sparc.operands[i].type == (sparc_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
case CS_ARCH_SYSZ:
|
||
|
for (i = 0; i < insn->detail->sysz.op_count; i++) {
|
||
|
if (insn->detail->sysz.operands[i].type == (sysz_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
case CS_ARCH_XCORE:
|
||
|
for (i = 0; i < insn->detail->xcore.op_count; i++) {
|
||
|
if (insn->detail->xcore.operands[i].type == (xcore_op_type)op_type)
|
||
|
count++;
|
||
|
if (count == post)
|
||
|
return i;
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return -1;
|
||
|
}
|