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/*
* Copyright (c) 2016-2019 Matt Borgerson
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _GDBSTUB_SYS_H_
#define _GDBSTUB_SYS_H_
/* Define the size_t type */
#define DBG_DEFINE_SIZET 1
/* Define required standard integer types (e.g. uint16_t) */
#define DBG_DEFINE_STDINT 1
/*****************************************************************************
* Types
****************************************************************************/
#if DBG_DEFINE_STDINT
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned long uint32_t;
#endif
#if DBG_DEFINE_SIZET
typedef unsigned int size_t;
#endif
typedef unsigned int address;
typedef unsigned int reg;
#pragma pack(1)
struct dbg_interrupt_state {
uint32_t ss;
uint32_t gs;
uint32_t fs;
uint32_t es;
uint32_t ds;
uint32_t edi;
uint32_t esi;
uint32_t ebp;
uint32_t esp;
uint32_t ebx;
uint32_t edx;
uint32_t ecx;
uint32_t eax;
uint32_t vector;
uint32_t error_code;
uint32_t eip;
uint32_t cs;
uint32_t eflags;
};
#pragma pack()
#pragma pack(1)
struct dbg_idtr
{
uint16_t len;
uint32_t offset;
};
#pragma pack()
#pragma pack(1)
struct dbg_idt_gate
{
uint16_t offset_low;
uint16_t segment;
uint16_t flags;
uint16_t offset_high;
};
#pragma pack()
enum DBG_REGISTER {
DBG_CPU_I386_REG_EAX = 0,
DBG_CPU_I386_REG_ECX = 1,
DBG_CPU_I386_REG_EDX = 2,
DBG_CPU_I386_REG_EBX = 3,
DBG_CPU_I386_REG_ESP = 4,
DBG_CPU_I386_REG_EBP = 5,
DBG_CPU_I386_REG_ESI = 6,
DBG_CPU_I386_REG_EDI = 7,
DBG_CPU_I386_REG_PC = 8,
DBG_CPU_I386_REG_PS = 9,
DBG_CPU_I386_REG_CS = 10,
DBG_CPU_I386_REG_SS = 11,
DBG_CPU_I386_REG_DS = 12,
DBG_CPU_I386_REG_ES = 13,
DBG_CPU_I386_REG_FS = 14,
DBG_CPU_I386_REG_GS = 15,
DBG_CPU_NUM_REGISTERS = 16
};
struct dbg_state {
int signum;
reg registers[DBG_CPU_NUM_REGISTERS];
};
/*****************************************************************************
* Const Data
****************************************************************************/
extern void const * const dbg_int_handlers[];
/*****************************************************************************
* Prototypes
****************************************************************************/
int dbg_hook_idt(uint8_t vector, const void *function);
int dbg_init_gates(void);
int dbg_init_idt(void);
int dbg_load_idt(struct dbg_idtr *idtr);
int dbg_store_idt(struct dbg_idtr *idtr);
uint32_t dbg_get_cs(void);
void dbg_int_handler(struct dbg_interrupt_state *istate);
void dbg_interrupt(struct dbg_interrupt_state *istate);
void dbg_start(void);
void dbg_io_write_8(uint16_t port, uint8_t val);
uint8_t dbg_io_read_8(uint16_t port);
void *dbg_sys_memset(void *ptr, int data, size_t len);
#endif
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