/* Unicorn Emulator Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2015 */

#ifndef UNICORN_ENGINE_H
#define UNICORN_ENGINE_H

#ifdef __cplusplus
extern "C" {
#endif

#include "platform.h"
#include <stdarg.h>

#if defined(UNICORN_HAS_OSXKERNEL)
#include <libkern/libkern.h>
#else
#include <stdlib.h>
#include <stdio.h>
#endif

struct uc_struct;
typedef struct uc_struct uc_engine;

typedef size_t uc_hook;

#include "m68k.h"
#include "x86.h"
#include "arm.h"
#include "arm64.h"
#include "mips.h"
#include "sparc.h"

#ifdef __GNUC__
#define DEFAULT_VISIBILITY __attribute__((visibility("default")))
#else
#define DEFAULT_VISIBILITY
#endif

#ifdef _MSC_VER
#pragma warning(disable:4201)
#pragma warning(disable:4100)
#ifdef UNICORN_SHARED
#define UNICORN_EXPORT __declspec(dllexport)
#else    // defined(UNICORN_STATIC)
#define UNICORN_EXPORT
#endif
#else
#ifdef __GNUC__
#define UNICORN_EXPORT __attribute__((visibility("default")))
#else
#define UNICORN_EXPORT
#endif
#endif

#ifdef __GNUC__
#define UNICORN_DEPRECATED __attribute__((deprecated))
#elif defined(_MSC_VER)
#define UNICORN_DEPRECATED __declspec(deprecated)
#else
#pragma message("WARNING: You need to implement UNICORN_DEPRECATED for this compiler")
#define UNICORN_DEPRECATED
#endif

// Unicorn API version
#define UC_API_MAJOR 1
#define UC_API_MINOR 0

// Unicorn package version
#define UC_VERSION_MAJOR UC_API_MAJOR
#define UC_VERSION_MINOR UC_API_MINOR
#define UC_VERSION_EXTRA 2


/*
  Macro to create combined version which can be compared to
  result of uc_version() API.
*/
#define UC_MAKE_VERSION(major, minor) ((major << 8) + minor)

// Scales to calculate timeout on microsecond unit
// 1 second = 1000,000 microseconds
#define UC_SECOND_SCALE 1000000
// 1 milisecond = 1000 nanoseconds
#define UC_MILISECOND_SCALE 1000

// Architecture type
typedef enum uc_arch {
    UC_ARCH_ARM = 1,    // ARM architecture (including Thumb, Thumb-2)
    UC_ARCH_ARM64,      // ARM-64, also called AArch64
    UC_ARCH_MIPS,       // Mips architecture
    UC_ARCH_X86,        // X86 architecture (including x86 & x86-64)
    UC_ARCH_PPC,        // PowerPC architecture (currently unsupported)
    UC_ARCH_SPARC,      // Sparc architecture
    UC_ARCH_M68K,       // M68K architecture
    UC_ARCH_MAX,
} uc_arch;

// Mode type
typedef enum uc_mode {
    UC_MODE_LITTLE_ENDIAN = 0,    // little-endian mode (default mode)
    UC_MODE_BIG_ENDIAN = 1 << 30, // big-endian mode
    // arm / arm64
    UC_MODE_ARM = 0,              // ARM mode
    UC_MODE_THUMB = 1 << 4,       // THUMB mode (including Thumb-2)
    UC_MODE_MCLASS = 1 << 5,      // ARM's Cortex-M series (currently unsupported)
    UC_MODE_V8 = 1 << 6,          // ARMv8 A32 encodings for ARM (currently unsupported)
    // mips
    UC_MODE_MICRO = 1 << 4,       // MicroMips mode (currently unsupported)
    UC_MODE_MIPS3 = 1 << 5,       // Mips III ISA (currently unsupported)
    UC_MODE_MIPS32R6 = 1 << 6,    // Mips32r6 ISA (currently unsupported)
    UC_MODE_MIPS32 = 1 << 2,      // Mips32 ISA
    UC_MODE_MIPS64 = 1 << 3,      // Mips64 ISA
    // x86 / x64
    UC_MODE_16 = 1 << 1,          // 16-bit mode
    UC_MODE_32 = 1 << 2,          // 32-bit mode
    UC_MODE_64 = 1 << 3,          // 64-bit mode
    // ppc 
    UC_MODE_PPC32 = 1 << 2,       // 32-bit mode (currently unsupported)
    UC_MODE_PPC64 = 1 << 3,       // 64-bit mode (currently unsupported)
    UC_MODE_QPX = 1 << 4,         // Quad Processing eXtensions mode (currently unsupported)
    // sparc
    UC_MODE_SPARC32 = 1 << 2,     // 32-bit mode
    UC_MODE_SPARC64 = 1 << 3,     // 64-bit mode
    UC_MODE_V9 = 1 << 4,          // SparcV9 mode (currently unsupported)
    // m68k
} uc_mode;

// All type of errors encountered by Unicorn API.
// These are values returned by uc_errno()
typedef enum uc_err {
    UC_ERR_OK = 0,   // No error: everything was fine
    UC_ERR_NOMEM,      // Out-Of-Memory error: uc_open(), uc_emulate()
    UC_ERR_ARCH,     // Unsupported architecture: uc_open()
    UC_ERR_HANDLE,   // Invalid handle
    UC_ERR_MODE,     // Invalid/unsupported mode: uc_open()
    UC_ERR_VERSION,  // Unsupported version (bindings)
    UC_ERR_READ_UNMAPPED, // Quit emulation due to READ on unmapped memory: uc_emu_start()
    UC_ERR_WRITE_UNMAPPED, // Quit emulation due to WRITE on unmapped memory: uc_emu_start()
    UC_ERR_FETCH_UNMAPPED, // Quit emulation due to FETCH on unmapped memory: uc_emu_start()
    UC_ERR_HOOK,    // Invalid hook type: uc_hook_add()
    UC_ERR_INSN_INVALID, // Quit emulation due to invalid instruction: uc_emu_start()
    UC_ERR_MAP, // Invalid memory mapping: uc_mem_map()
    UC_ERR_WRITE_PROT, // Quit emulation due to UC_MEM_WRITE_PROT violation: uc_emu_start()
    UC_ERR_READ_PROT, // Quit emulation due to UC_MEM_READ_PROT violation: uc_emu_start()
    UC_ERR_FETCH_PROT, // Quit emulation due to UC_MEM_FETCH_PROT violation: uc_emu_start()
    UC_ERR_ARG,     // Inavalid argument provided to uc_xxx function (See specific function API)
    UC_ERR_READ_UNALIGNED,  // Unaligned read
    UC_ERR_WRITE_UNALIGNED,  // Unaligned write
    UC_ERR_FETCH_UNALIGNED,  // Unaligned fetch
    UC_ERR_HOOK_EXIST,  // hook for this event already existed
    UC_ERR_RESOURCE,    // Insufficient resource: uc_emu_start()
    UC_ERR_EXCEPTION // Unhandled CPU exception
} uc_err;


/*
  Callback function for tracing code (UC_HOOK_CODE & UC_HOOK_BLOCK)

  @address: address where the code is being executed
  @size: size of machine instruction(s) being executed, or 0 when size is unknown
  @user_data: user data passed to tracing APIs.
*/
typedef void (*uc_cb_hookcode_t)(uc_engine *uc, uint64_t address, uint32_t size, void *user_data);

/*
  Callback function for tracing interrupts (for uc_hook_intr())

  @intno: interrupt number
  @user_data: user data passed to tracing APIs.
*/
typedef void (*uc_cb_hookintr_t)(uc_engine *uc, uint32_t intno, void *user_data);

/*
  Callback function for tracing IN instruction of X86

  @port: port number
  @size: data size (1/2/4) to be read from this port
  @user_data: user data passed to tracing APIs.
*/
typedef uint32_t (*uc_cb_insn_in_t)(uc_engine *uc, uint32_t port, int size, void *user_data);

/*
  Callback function for OUT instruction of X86

  @port: port number
  @size: data size (1/2/4) to be written to this port
  @value: data value to be written to this port
*/
typedef void (*uc_cb_insn_out_t)(uc_engine *uc, uint32_t port, int size, uint32_t value, void *user_data);

// All type of memory accesses for UC_HOOK_MEM_*
typedef enum uc_mem_type {
    UC_MEM_READ = 16,   // Memory is read from
    UC_MEM_WRITE,       // Memory is written to
    UC_MEM_FETCH,       // Memory is fetched
    UC_MEM_READ_UNMAPPED,    // Unmapped memory is read from
    UC_MEM_WRITE_UNMAPPED,   // Unmapped memory is written to
    UC_MEM_FETCH_UNMAPPED,   // Unmapped memory is fetched
    UC_MEM_WRITE_PROT,  // Write to write protected, but mapped, memory
    UC_MEM_READ_PROT,   // Read from read protected, but mapped, memory
    UC_MEM_FETCH_PROT,  // Fetch from non-executable, but mapped, memory
    UC_MEM_READ_AFTER,   // Memory is read from (successful access)
} uc_mem_type;

// All type of hooks for uc_hook_add() API.
typedef enum uc_hook_type {
    // Hook all interrupt/syscall events
    UC_HOOK_INTR = 1 << 0,
    // Hook a particular instruction - only a very small subset of instructions supported here
    UC_HOOK_INSN = 1 << 1,
    // Hook a range of code
    UC_HOOK_CODE = 1 << 2,
    // Hook basic blocks
    UC_HOOK_BLOCK = 1 << 3,
    // Hook for memory read on unmapped memory
    UC_HOOK_MEM_READ_UNMAPPED = 1 << 4,
    // Hook for invalid memory write events
    UC_HOOK_MEM_WRITE_UNMAPPED = 1 << 5,
    // Hook for invalid memory fetch for execution events
    UC_HOOK_MEM_FETCH_UNMAPPED = 1 << 6,
    // Hook for memory read on read-protected memory
    UC_HOOK_MEM_READ_PROT = 1 << 7,
    // Hook for memory write on write-protected memory
    UC_HOOK_MEM_WRITE_PROT = 1 << 8,
    // Hook for memory fetch on non-executable memory
    UC_HOOK_MEM_FETCH_PROT = 1 << 9,
    // Hook memory read events.
    UC_HOOK_MEM_READ = 1 << 10,
    // Hook memory write events.
    UC_HOOK_MEM_WRITE = 1 << 11,
    // Hook memory fetch for execution events
    UC_HOOK_MEM_FETCH = 1 << 12,
    // Hook memory read events, but only successful access.
    // The callback will be triggered after successful read.
    UC_HOOK_MEM_READ_AFTER = 1 << 13,
} uc_hook_type;

// Hook type for all events of unmapped memory access
#define UC_HOOK_MEM_UNMAPPED (UC_HOOK_MEM_READ_UNMAPPED + UC_HOOK_MEM_WRITE_UNMAPPED + UC_HOOK_MEM_FETCH_UNMAPPED)
// Hook type for all events of illegal protected memory access
#define UC_HOOK_MEM_PROT (UC_HOOK_MEM_READ_PROT + UC_HOOK_MEM_WRITE_PROT + UC_HOOK_MEM_FETCH_PROT)
// Hook type for all events of illegal read memory access
#define UC_HOOK_MEM_READ_INVALID (UC_HOOK_MEM_READ_PROT + UC_HOOK_MEM_READ_UNMAPPED)
// Hook type for all events of illegal write memory access
#define UC_HOOK_MEM_WRITE_INVALID (UC_HOOK_MEM_WRITE_PROT + UC_HOOK_MEM_WRITE_UNMAPPED)
// Hook type for all events of illegal fetch memory access
#define UC_HOOK_MEM_FETCH_INVALID (UC_HOOK_MEM_FETCH_PROT + UC_HOOK_MEM_FETCH_UNMAPPED)
// Hook type for all events of illegal memory access
#define UC_HOOK_MEM_INVALID (UC_HOOK_MEM_UNMAPPED + UC_HOOK_MEM_PROT)
// Hook type for all events of valid memory access
#define UC_HOOK_MEM_VALID (UC_HOOK_MEM_READ + UC_HOOK_MEM_WRITE + UC_HOOK_MEM_FETCH)

/*
  Callback function for hooking memory (UC_MEM_READ, UC_MEM_WRITE & UC_MEM_FETCH)

  @type: this memory is being READ, or WRITE
  @address: address where the code is being executed
  @size: size of data being read or written
  @value: value of data being written to memory, or irrelevant if type = READ.
  @user_data: user data passed to tracing APIs
*/
typedef void (*uc_cb_hookmem_t)(uc_engine *uc, uc_mem_type type,
        uint64_t address, int size, int64_t value, void *user_data);

/*
  Callback function for handling invalid memory access events (UC_MEM_*_UNMAPPED and
    UC_MEM_*PROT events)

  @type: this memory is being READ, or WRITE
  @address: address where the code is being executed
  @size: size of data being read or written
  @value: value of data being written to memory, or irrelevant if type = READ.
  @user_data: user data passed to tracing APIs

  @return: return true to continue, or false to stop program (due to invalid memory).
*/
typedef bool (*uc_cb_eventmem_t)(uc_engine *uc, uc_mem_type type,
        uint64_t address, int size, int64_t value, void *user_data);

/*
  Memory region mapped by uc_mem_map() and uc_mem_map_ptr()
  Retrieve the list of memory regions with uc_mem_regions()
*/
typedef struct uc_mem_region {
    uint64_t begin; // begin address of the region (inclusive)
    uint64_t end;   // end address of the region (inclusive)
    uint32_t perms; // memory permissions of the region
} uc_mem_region;

// All type of queries for uc_query() API.
typedef enum uc_query_type {
    // Dynamically query current hardware mode.
    UC_QUERY_MODE = 1,
    UC_QUERY_PAGE_SIZE,
} uc_query_type;

// Opaque storage for CPU context, used with uc_context_*()
struct uc_context;
typedef struct uc_context uc_context;

/*
 Return combined API version & major and minor version numbers.

 @major: major number of API version
 @minor: minor number of API version

 @return hexical number as (major << 8 | minor), which encodes both
     major & minor versions.
     NOTE: This returned value can be compared with version number made
     with macro UC_MAKE_VERSION

 For example, second API version would return 1 in @major, and 1 in @minor
 The return value would be 0x0101

 NOTE: if you only care about returned value, but not major and minor values,
 set both @major & @minor arguments to NULL.
*/
UNICORN_EXPORT
unsigned int uc_version(unsigned int *major, unsigned int *minor);


/*
 Determine if the given architecture is supported by this library.

 @arch: architecture type (UC_ARCH_*)

 @return True if this library supports the given arch.
*/
UNICORN_EXPORT
bool uc_arch_supported(uc_arch arch);


/*
 Create new instance of unicorn engine.

 @arch: architecture type (UC_ARCH_*)
 @mode: hardware mode. This is combined of UC_MODE_*
 @uc: pointer to uc_engine, which will be updated at return time

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_open(uc_arch arch, uc_mode mode, uc_engine **uc);

/*
 Close a Unicorn engine instance.
 NOTE: this must be called only when there is no longer any
 usage of @uc. This API releases some of @uc's cached memory, thus
 any use of the Unicorn API with @uc after it has been closed may
 crash your application. After this, @uc is invalid, and is no
 longer usable.

 @uc: pointer to a handle returned by uc_open()

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_close(uc_engine *uc);

/*
 Query internal status of engine.

 @uc: handle returned by uc_open()
 @type: query type. See uc_query_type

 @result: save the internal status queried

 @return: error code of uc_err enum type (UC_ERR_*, see above)
*/
UNICORN_EXPORT
uc_err uc_query(uc_engine *uc, uc_query_type type, size_t *result);

/*
 Report the last error number when some API function fail.
 Like glibc's errno, uc_errno might not retain its old value once accessed.

 @uc: handle returned by uc_open()

 @return: error code of uc_err enum type (UC_ERR_*, see above)
*/
UNICORN_EXPORT
uc_err uc_errno(uc_engine *uc);

/*
 Return a string describing given error code.

 @code: error code (see UC_ERR_* above)

 @return: returns a pointer to a string that describes the error code
   passed in the argument @code
 */
UNICORN_EXPORT
const char *uc_strerror(uc_err code);

/*
 Write to register.

 @uc: handle returned by uc_open()
 @regid:  register ID that is to be modified.
 @value:  pointer to the value that will set to register @regid

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_reg_write(uc_engine *uc, int regid, const void *value);

/*
 Read register value.

 @uc: handle returned by uc_open()
 @regid:  register ID that is to be retrieved.
 @value:  pointer to a variable storing the register value.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_reg_read(uc_engine *uc, int regid, void *value);

/*
 Write multiple register values.

 @uc: handle returned by uc_open()
 @rges:  array of register IDs to store
 @value: pointer to array of register values
 @count: length of both *regs and *vals

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_reg_write_batch(uc_engine *uc, int *regs, void *const *vals, int count);

/*
 Read multiple register values.

 @uc: handle returned by uc_open()
 @rges:  array of register IDs to retrieve
 @value: pointer to array of values to hold registers
 @count: length of both *regs and *vals

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_reg_read_batch(uc_engine *uc, int *regs, void **vals, int count);

/*
 Write to a range of bytes in memory.

 @uc: handle returned by uc_open()
 @address: starting memory address of bytes to set.
 @bytes:   pointer to a variable containing data to be written to memory.
 @size:   size of memory to write to.

 NOTE: @bytes must be big enough to contain @size bytes.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_write(uc_engine *uc, uint64_t address, const void *bytes, size_t size);

/*
 Read a range of bytes in memory.

 @uc: handle returned by uc_open()
 @address: starting memory address of bytes to get.
 @bytes:   pointer to a variable containing data copied from memory.
 @size:   size of memory to read.

 NOTE: @bytes must be big enough to contain @size bytes.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_read(uc_engine *uc, uint64_t address, void *bytes, size_t size);

/*
 Emulate machine code in a specific duration of time.

 @uc: handle returned by uc_open()
 @begin: address where emulation starts
 @until: address where emulation stops (i.e when this address is hit)
 @timeout: duration to emulate the code (in microseconds). When this value is 0,
        we will emulate the code in infinite time, until the code is finished.
 @count: the number of instructions to be emulated. When this value is 0,
        we will emulate all the code available, until the code is finished.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_emu_start(uc_engine *uc, uint64_t begin, uint64_t until, uint64_t timeout, size_t count);

/*
 Stop emulation (which was started by uc_emu_start() API.
 This is typically called from callback functions registered via tracing APIs.

 @uc: handle returned by uc_open()

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_emu_stop(uc_engine *uc);

/*
 Register callback for a hook event.
 The callback will be run when the hook event is hit.

 @uc: handle returned by uc_open()
 @hh: hook handle returned from this registration. To be used in uc_hook_del() API
 @type: hook type
 @callback: callback to be run when instruction is hit
 @user_data: user-defined data. This will be passed to callback function in its
      last argument @user_data
 @begin: start address of the area where the callback is effect (inclusive)
 @end: end address of the area where the callback is effect (inclusive)
   NOTE 1: the callback is called only if related address is in range [@begin, @end]
   NOTE 2: if @begin > @end, callback is called whenever this hook type is triggered
 @...: variable arguments (depending on @type)
   NOTE: if @type = UC_HOOK_INSN, this is the instruction ID (ex: UC_X86_INS_OUT)

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_hook_add(uc_engine *uc, uc_hook *hh, int type, void *callback,
        void *user_data, uint64_t begin, uint64_t end, ...);

/*
 Unregister (remove) a hook callback.
 This API removes the hook callback registered by uc_hook_add().
 NOTE: this should be called only when you no longer want to trace.
 After this, @hh is invalid, and nolonger usable.

 @uc: handle returned by uc_open()
 @hh: handle returned by uc_hook_add()

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_hook_del(uc_engine *uc, uc_hook hh);

typedef enum uc_prot {
   UC_PROT_NONE = 0,
   UC_PROT_READ = 1,
   UC_PROT_WRITE = 2,
   UC_PROT_EXEC = 4,
   UC_PROT_ALL = 7,
} uc_prot;

/*
 Map memory in for emulation.
 This API adds a memory region that can be used by emulation.

 @uc: handle returned by uc_open()
 @address: starting address of the new memory region to be mapped in.
    This address must be aligned to 4KB, or this will return with UC_ERR_ARG error.
 @size: size of the new memory region to be mapped in.
    This size must be multiple of 4KB, or this will return with UC_ERR_ARG error.
 @perms: Permissions for the newly mapped region.
    This must be some combination of UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC,
    or this will return with UC_ERR_ARG error.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_map(uc_engine *uc, uint64_t address, size_t size, uint32_t perms);

/*
 Map existing host memory in for emulation.
 This API adds a memory region that can be used by emulation.

 @uc: handle returned by uc_open()
 @address: starting address of the new memory region to be mapped in.
    This address must be aligned to 4KB, or this will return with UC_ERR_ARG error.
 @size: size of the new memory region to be mapped in.
    This size must be multiple of 4KB, or this will return with UC_ERR_ARG error.
 @perms: Permissions for the newly mapped region.
    This must be some combination of UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC,
    or this will return with UC_ERR_ARG error.
 @ptr: pointer to host memory backing the newly mapped memory. This host memory is
    expected to be an equal or larger size than provided, and be mapped with at
    least PROT_READ | PROT_WRITE. If it is not, the resulting behavior is undefined.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_map_ptr(uc_engine *uc, uint64_t address, size_t size, uint32_t perms, void *ptr);

/*
 Unmap a region of emulation memory.
 This API deletes a memory mapping from the emulation memory space.

 @uc: handle returned by uc_open()
 @address: starting address of the memory region to be unmapped.
    This address must be aligned to 4KB, or this will return with UC_ERR_ARG error.
 @size: size of the memory region to be modified.
    This size must be multiple of 4KB, or this will return with UC_ERR_ARG error.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_unmap(uc_engine *uc, uint64_t address, size_t size);

/*
 Set memory permissions for emulation memory.
 This API changes permissions on an existing memory region.

 @uc: handle returned by uc_open()
 @address: starting address of the memory region to be modified.
    This address must be aligned to 4KB, or this will return with UC_ERR_ARG error.
 @size: size of the memory region to be modified.
    This size must be multiple of 4KB, or this will return with UC_ERR_ARG error.
 @perms: New permissions for the mapped region.
    This must be some combination of UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC,
    or this will return with UC_ERR_ARG error.

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_protect(uc_engine *uc, uint64_t address, size_t size, uint32_t perms);

/*
 Retrieve all memory regions mapped by uc_mem_map() and uc_mem_map_ptr()
 This API allocates memory for @regions, and user must free this memory later
 by free() to avoid leaking memory.
 NOTE: memory regions may be splitted by uc_mem_unmap()

 @uc: handle returned by uc_open()
 @regions: pointer to an array of uc_mem_region struct. This is allocated by
   Unicorn, and must be freed by user later with uc_free()
 @count: pointer to number of struct uc_mem_region contained in @regions

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_regions(uc_engine *uc, uc_mem_region **regions, uint32_t *count);

/*
 Allocate a region that can be used with uc_context_{save,restore} to perform
 quick save/rollback of the CPU context, which includes registers and some
 internal metadata. Contexts may not be shared across engine instances with
 differing arches or modes.

 @uc: handle returned by uc_open()
 @context: pointer to a uc_engine*. This will be updated with the pointer to
   the new context on successful return of this function.
   Later, this allocated memory must be freed with uc_free().

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_context_alloc(uc_engine *uc, uc_context **context);

/*
 Free the memory allocated by uc_context_alloc & uc_mem_regions.

 @mem: memory allocated by uc_context_alloc (returned in *context), or
       by uc_mem_regions (returned in *regions)

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_free(void *mem);

/*
 Save a copy of the internal CPU context.
 This API should be used to efficiently make or update a saved copy of the
 internal CPU state.

 @uc: handle returned by uc_open()
 @context: handle returned by uc_context_alloc()

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_context_save(uc_engine *uc, uc_context *context);

/*
 Restore the current CPU context from a saved copy.
 This API should be used to roll the CPU context back to a previous
 state saved by uc_context_save().

 @uc: handle returned by uc_open()
 @buffer: handle returned by uc_context_alloc that has been used with uc_context_save

 @return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
   for detailed error).
*/
UNICORN_EXPORT
uc_err uc_context_restore(uc_engine *uc, uc_context *context);

#ifdef __cplusplus
}
#endif

#endif