85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
#pragma once
|
|
#include <stdint.h>
|
|
|
|
// Labels of v8086 programs
|
|
// TODO Remove these and use
|
|
// a single define for location?
|
|
extern void v86Test();
|
|
extern void v86TransFlag();
|
|
extern void v86Interrupt();
|
|
extern void v86TextMode();
|
|
extern void v86DiskOp();
|
|
extern void v86DiskGetGeometry();
|
|
extern void v86DiskReadCHS();
|
|
|
|
union __attribute((__packed__)) V86Regs_t {
|
|
struct dword_regs {
|
|
uint32_t ebp;
|
|
uint32_t edi;
|
|
uint32_t esi;
|
|
uint32_t ebx;
|
|
uint32_t edx;
|
|
uint32_t ecx;
|
|
uint32_t eax;
|
|
} d;
|
|
struct word_regs {
|
|
uint16_t bp, _upper_bp;
|
|
uint16_t di, _upper_di;
|
|
uint16_t si, _upper_si;
|
|
uint16_t bx, _upper_bx;
|
|
uint16_t dx, _upper_dx;
|
|
uint16_t cx, _upper_cx;
|
|
uint16_t ax, _upper_ax;
|
|
} w;
|
|
struct byte_regs {
|
|
uint32_t ebp;
|
|
uint32_t edi;
|
|
uint32_t esi;
|
|
uint8_t bl, bh;
|
|
uint16_t _upper_bx;
|
|
uint8_t dl, dh;
|
|
uint16_t _upper_dx;
|
|
uint8_t cl, ch;
|
|
uint16_t _upper_cx;
|
|
uint8_t al, ah;
|
|
uint16_t _upper_ax;
|
|
} h;
|
|
};
|
|
|
|
extern uint32_t enter_v86(uint32_t ss, uint32_t esp, uint32_t cs, uint32_t eip, union V86Regs_t *regs);
|
|
|
|
void V8086Int(uint8_t interrupt, union V86Regs_t *regs);
|
|
|
|
struct __attribute((__packed__)) Int13DiskPacket_t {
|
|
uint8_t size; // 0x10
|
|
uint8_t reserved; // 0x00
|
|
uint16_t blocks;
|
|
uint32_t transfer_buffer; // 0x2300:0000
|
|
uint64_t start_block;
|
|
};
|
|
|
|
extern struct Int13DiskPacket_t v86disk_addr_packet;
|
|
|
|
/* Real Mode helper macros */
|
|
/* segment:offset pair */
|
|
typedef uint32_t FARPTR;
|
|
|
|
/* Make a FARPTR from a segment and an offset */
|
|
#define MK_FP(seg, off) ((FARPTR) (((uint32_t) (seg) << 16) | (uint16_t) (off)))
|
|
|
|
/* Extract the segment part of a FARPTR */
|
|
#define FP_SEG(fp) (((FARPTR) fp) >> 16)
|
|
|
|
/* Extract the offset part of a FARPTR */
|
|
#define FP_OFF(fp) (((FARPTR) fp) & 0xffff)
|
|
|
|
/* Convert a segment:offset pair to a linear address */
|
|
#define FP_TO_LINEAR(seg, off) ((void*)(uintptr_t)((((uint32_t)seg) << 4) + ((uint32_t)off)))
|
|
|
|
#define EFLAG_IF ((uint32_t)1 << 9)
|
|
#define EFLAG_VM ((uint32_t)1 << 17)
|
|
|
|
FARPTR i386LinearToFp(void *ptr);
|
|
|
|
void ensure_v86env();
|