#include <common.h>
#include <tasks/vm86.h>
#include <tasks/schedule.h>
#include <interrupts/syscall.h>
#include <interrupts/isr.h>
#include <boot/multiboot.h>
#include <mem/gdt.h>
#include <mem/vmm.h>
#include <string.h>
#include <syscall.h>

Include dependency graph for vm86.c:

Data Structures
struct	vm86_farptr_t
	A real mode far pointer. More...

Macros
#define	CODE_ADDRESS ((void*) 0x500)
	Where the assembly code will be located. More...

#define	IVT_ADDRESS ((void*) 0)
	The real mode IVT (= Interrupt Vector Table) lies at the start of memory. More...

#define	OPERAND_SIZE 0x66
	opcode for overriding operand size

#define	OPCODE_PUSHF 0x9C
	PUSHF triggers a GPF inside VM86 mode.

#define	OPCODE_POPF 0x9D
	POPF triggers a GPF inside VM86 mode.

#define	OPCODE_INT_3 0xCC
	INT $3 triggers a GPF inside VM86 mode.

#define	OPCODE_INT 0xCD
	INT triggers a GPF inside VM86 mode.

#define	OPCODE_IRET 0xCF
	IRET triggers a GPF inside VM86 mode.

#define	OPCODE_CLI 0xFA
	CLI triggers a GPF inside VM86 mode.

#define	OPCODE_STI 0xFB
	STI triggers a GPF inside VM86 mode.

#define	CASE_IN(opcode, in_func, operand, inc, type)
	Emulates an IN instruction. More...

#define	CASE_OUT(opcode, out_func, operand, inc)
	Emulates an OUT instruction. More...

Functions
static vm86_farptr_t	vm86_get_farptr (void *addr)
	Translate an address into a far pointer. More...

static void	vm86_write_farptr (uint16_t segment, uint16_t offset, vm86_farptr_t farptr)
	Writes a far pointer into another location. More...

static void *	vm86_get_address (vm86_farptr_t farptr)
	Translate a far pointer into an address. More...

task_pid_t	vm86_create_task (void code_start, void code_end, page_directory_t page_directory, size_t kernel_stack_len, size_t user_stack_len, isr_registers_t registers)
	Creates a VM86 task. More...

void	vm86_call_bios (uint8_t interrupt, isr_registers_t *registers)
	Calls a BIOS interrupt. More...

static void	vm86_push (cpu_state_t *cpu, uint16_t value)
	Emulates a PUSH instruction. More...

static uint16_t	vm86_pop (cpu_state_t *cpu)
	Emulates a POP instruction. More...

static void	vm86_increment_eip (cpu_state_t *cpu, size_t inc)
	Emulates the completion of an instruction. More...

static uint8_t	vm86_monitor (cpu_state_t *cpu)
	Monitors a VM86 task by emulating sensitive instructions. More...

static cpu_state_t *	vm86_handle_gpf (cpu_state_t *cpu)
	Handles general protection faults. More...

void	vm86_init ()
	Initializes VM86 mode.

Variables
static vm86_farptr_t *	ivt = IVT_ADDRESS
	IVT needed to do BIOS calls.

const void	vm86_call_bios_start
	start of the BIOS call code

const void	vm86_call_bios_end
	end of the BIOS call code

const void	vm86_interrupt_hook
	location of INT in the BIOS call code

Data Structures

Macros

Functions

Variables