86Box/src/include/86box/gdbstub.h

/*
 * 86Box	A hypervisor and IBM PC system emulator that specializes in
 *		running old operating systems and software designed for IBM
 *		PC systems and compatibles from 1981 through fairly recent
 *		system designs based on the PCI bus.
 *
 *		This file is part of the 86Box distribution.
 *
 *		Definitions for the GDB stub server.
 *
 *
 *
 * Authors:	RichardG, <richardg867@gmail.com>
 *
 *		Copyright 2022 RichardG.
 */
#ifndef EMU_GDBSTUB_H
#define EMU_GDBSTUB_H
#include <86box/mem.h>

#define GDBSTUB_MEM_READ   0
#define GDBSTUB_MEM_WRITE  16
#define GDBSTUB_MEM_AWATCH 32

enum {
    GDBSTUB_EXEC = 0,
    GDBSTUB_SSTEP,
    GDBSTUB_BREAK,
    GDBSTUB_BREAK_SW,
    GDBSTUB_BREAK_HW,
    GDBSTUB_BREAK_RWATCH,
    GDBSTUB_BREAK_WWATCH,
    GDBSTUB_BREAK_AWATCH
};

#ifdef USE_GDBSTUB

#    define GDBSTUB_MEM_ACCESS(addr, access, width)                                \
        uint32_t gdbstub_page = addr >> MEM_GRANULARITY_BITS;                      \
        if (gdbstub_watch_pages[gdbstub_page >> 6] & (1 << (gdbstub_page & 63))) { \
            uint32_t gdbstub_addrs[width];                                         \
            for (int gdbstub_i = 0; gdbstub_i < width; gdbstub_i++)                \
                gdbstub_addrs[gdbstub_i] = addr + gdbstub_i;                       \
            gdbstub_mem_access(gdbstub_addrs, access | width);                     \
        }

#    define GDBSTUB_MEM_ACCESS_FAST(addrs, access, width)                        \
        uint32_t gdbstub_page = addr >> MEM_GRANULARITY_BITS;                    \
        if (gdbstub_watch_pages[gdbstub_page >> 6] & (1 << (gdbstub_page & 63))) \
            gdbstub_mem_access(addrs, access | width);

extern int      gdbstub_step, gdbstub_next_asap;
extern uint64_t gdbstub_watch_pages[(((uint32_t) -1) >> (MEM_GRANULARITY_BITS + 6)) + 1];

extern void gdbstub_cpu_init();
extern int  gdbstub_instruction();
extern int  gdbstub_int3();
extern void gdbstub_mem_access(uint32_t *addrs, int access);
extern void gdbstub_init();
extern void gdbstub_close();

#else

#    define GDBSTUB_MEM_ACCESS(addr, access, width)
#    define GDBSTUB_MEM_ACCESS_FAST(addrs, access, width)

#    define gdbstub_step      0
#    define gdbstub_next_asap 0

#    define gdbstub_cpu_init()
#    define gdbstub_instruction() 0
#    define gdbstub_int3()        0
#    define gdbstub_init()
#    define gdbstub_close()

#endif

#endif