#include <stdint.h>

#include <stddef.h>

#include <signal.h>

#include <unistd.h>

/* debug states */

enum __dbg_state {

	__DBG_STATE_IDLE,

	__DBG_STATE_REPLY_PENDING,

	__DBG_STATE_CREATE_THREAD,

	__DBG_STATE_CREATE_PROCESS,

	__DBG_STATE_EXIT_THREAD,

	__DBG_STATE_EXIT_PROCESS,

	__DBG_STATE_EXCEPTION,

	__DBG_STATE_BREAKPOINT,

	__DBG_STATE_SINGLE_STEP,

	__DBG_STATE_DLL_LOAD,

	__DBG_STATE_DLL_UNLOAD,

};

/* debug responses */

#define __DBG_RESPONSE_CONTINUE                 (0x00010002)

#define __DBG_RESPONSE_EXCEPTION_HANDLED        (0x00010001)

#define __DBG_RESPONSE_EXCEPTION_NOT_HANDLED    (0x80010001)

#define __DBG_RESPONSE_REPLY_LATER              (0x40010001)

#define __DBG_RESPONSE_TERMINATE_PROCESS        (0x40010004)

#define __DBG_RESPONSE_TERMINATE_THREAD         (0x40010003)

/* thread types */

#define __DBG_THREAD_TYPE_UNKNOWN       0x00

#define __DBG_THREAD_TYPE_PTHREAD       0x01

#define __DBG_THREAD_TYPE_DAEMON        0x02

#define __DBG_THREAD_TYPE_PTYREF        0x03

#define __DBG_THREAD_TYPE_POLLER        0x04

#define __DBG_THREAD_TYPE_WAITER        0x05

#define __DBG_THREAD_TYPE_TIMER         0x06

#define __DBG_THREAD_TYPE_BRIDGE        0x07

#define __DBG_THREAD_TYPE_PIPEIN        0x08

#define __DBG_THREAD_TYPE_PIPEOUT       0x09

#define __DBG_THREAD_TYPE_TTYANY        0x40

#define __DBG_THREAD_TYPE_TTYSRV        0x41

#define __DBG_THREAD_TYPE_TTYSVC        0x42

#define __DBG_THREAD_TYPE_TTYASYNC      0x43

#define __DBG_THREAD_TYPE_TTYCLIENT     0x44

#define __DBG_THREAD_TYPE_TTYDEBUG      0x45

#define __DBG_THREAD_TYPE_TTYCONN       0x46

/* exception source bits */

#define __DBG_EXCEPTION_SOURCE_UNKNOWN  0x00

#define __DBG_EXCEPTION_SOURCE_HARDWARE 0x01

#define __DBG_EXCEPTION_SOURCE_SOFTWARE 0x02

#define __DBG_EXCEPTION_SOURCE_KERNEL   0x04

#define __DBG_EXCEPTION_SOURCE_USER     0x08

/* exception record */

struct __erec {

	uint32_t        exception_code;

	uint32_t        exception_flags;

	struct __erec * exception_record;

	void *          exception_address;

	uint32_t        exception_params;

	uintptr_t       exception_info[0xf];

};

/* debug event alpha definition */

struct __dbg_event {

	int             evttype;

	int             evtzone;

	int32_t         estatus;

	int32_t         eresponse;

	uint64_t        evtkey;

	uint64_t        evtqpc;

	pid_t           cpid;

	pid_t           ctid;

	pid_t           syspid;

	pid_t           systid;

	mcontext_t *    thread_context;

	siginfo_t *     thread_siginfo;

	stack_t *       thread_cstack;

	stack_t *       thread_astack;

	sigset_t *      thread_sigmask;

	struct tstat *  thread_stat;

	struct __teb *  thread_teb;

	struct __tlca * thread_tlca;

	struct __erec * exception_record;

	uint32_t        exception_priority;

	uint32_t        exception_source;

	int             syscall_depth;

	int             syscall_number;

	intptr_t        syscall_result;

        intptr_t        syscall_params[6];

	uint32_t *      thread_subsystem_key;

	void *          thread_start_address;

	int32_t *       thread_exit_code;

	uint32_t *      process_subsystem_key;

	void *          process_image_handle;

	void *          process_image_base;

	int32_t *       process_exit_code;

	void *          module_image_handle;

	void *          module_image_base;

	uint32_t        dbg_info_offset;

	uint32_t        dbg_info_size;

	const char *    image_rpath;

	const char *    image_apath;

	const char *    image_npath;

	const char *    image_dpath;

};

/* pid (or syspid) --> debug file descriptor */

int __dbg_attach(pid_t);

int __dbg_detach(int);

/* process creation/suspension/termination --> debug file descriptor */

int __dbg_spawn(const char *, char **, char **);

int __dbg_fork();

int __dbg_suspend(int);

int __dbg_kill(int);

/**

 * query one (or all) pending debug event(s) for the given debug

 *    file descriptor:

 * in the 'one' case, the return value indicates the total number

 *    of events that are pending for the given file descriptor;

 * in the 'all' case, the third argument specifies the number

 *    of elements in the user-provided buffer.

**/

int __dbg_event_query_one(int,struct __dbg_event *);

int __dbg_event_query_all(int,struct __dbg_event[],int);

/**

 * first acquire (remove from the queue) the next pending debug event;

 * later respond to the event, the default being __DBG_RESPONSE_CONTINUE.

**/

int __dbg_event_acquire(int,struct __dbg_event *);

int __dbg_event_respond(int,struct __dbg_event *);

/* debug file descriptor --> common (or system) pid */

int __dbg_query_cpid(int);

int __dbg_query_syspid(int);

/* code of last debug operation error encountered by this pthread */

int __dbg_common_error(void);

int __dbg_native_error(void);