x64hook/misc.c

#include <stdio.h>
#include <stdlib.h>
#include "udis86.h"
#include "misc.h"

void disassemble_func(void* function, size_t numberOfInstr)
{
	unsigned char* p = function;
	ud_t ud;

	ud_init(&ud);
	ud_set_input_buffer(&ud, function, (size_t)function | (0x1000 - 1)); // Can't read further than page boundary - there be dragons
	ud_set_pc(&ud, (uint64_t)function);
	ud_set_mode(&ud, 64);
	ud_set_syntax(&ud, UD_SYN_INTEL);

	for(size_t i = 0; i < numberOfInstr; i++)
	{
		size_t instrLen = 0;
		if(!(instrLen = ud_disassemble(&ud)) || ud.error)
			return;

		p += instrLen;

		printf("%p %s\n", ud_insn_off(&ud), ud_insn_asm(&ud));

		// ugly, ugly hack todo: make it work
		if(strcmp(ud_insn_asm(&ud), "jmp qword [rip]") == 0)
			p += 8;
	}
}