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#![allow(non_snake_case)]
use crate::cpu_context::CpuContext;
use crate::gen;
use crate::modrm;
use crate::prefix::{PREFIX_66, PREFIX_67, PREFIX_F2, PREFIX_F3};
use crate::regs::{CS, DS, ES, FS, GS, SS};
#[derive(PartialEq, Eq)]
pub enum AnalysisType {
Normal,
BlockBoundary,
Jump {
offset: i32,
is_32: bool,
condition: Option<u8>,
},
STI,
}
pub struct Analysis {
pub no_next_instruction: bool,
pub absolute_jump: bool,
pub ty: AnalysisType,
}
pub fn analyze_step(mut cpu: &mut CpuContext) -> Analysis {
let mut analysis = Analysis {
no_next_instruction: false,
absolute_jump: false,
ty: AnalysisType::Normal,
};
cpu.prefixes = 0;
let opcode = cpu.read_imm8() as u32 | (cpu.osize_32() as u32) << 8;
gen::analyzer::analyzer(opcode, &mut cpu, &mut analysis);
analysis
}
pub fn analyze_step_handle_prefix(cpu: &mut CpuContext, analysis: &mut Analysis) {
gen::analyzer::analyzer(
cpu.read_imm8() as u32 | (cpu.osize_32() as u32) << 8,
cpu,
analysis,
)
}
pub fn analyze_step_handle_segment_prefix(
segment: u32,
cpu: &mut CpuContext,
analysis: &mut Analysis,
) {
dbg_assert!(segment <= 5);
cpu.prefixes |= segment as u8 + 1;
analyze_step_handle_prefix(cpu, analysis)
}
pub fn instr16_0F_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
gen::analyzer0f::analyzer(cpu.read_imm8() as u32, cpu, analysis)
}
pub fn instr32_0F_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
gen::analyzer0f::analyzer(cpu.read_imm8() as u32 | 0x100, cpu, analysis)
}
pub fn instr_26_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
analyze_step_handle_segment_prefix(ES, cpu, analysis)
}
pub fn instr_2E_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
analyze_step_handle_segment_prefix(CS, cpu, analysis)
}
pub fn instr_36_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
analyze_step_handle_segment_prefix(SS, cpu, analysis)
}
pub fn instr_3E_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
analyze_step_handle_segment_prefix(DS, cpu, analysis)
}
pub fn instr_64_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
analyze_step_handle_segment_prefix(FS, cpu, analysis)
}
pub fn instr_65_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
analyze_step_handle_segment_prefix(GS, cpu, analysis)
}
pub fn instr_66_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
cpu.prefixes |= PREFIX_66;
analyze_step_handle_prefix(cpu, analysis)
}
pub fn instr_67_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
cpu.prefixes |= PREFIX_67;
analyze_step_handle_prefix(cpu, analysis)
}
pub fn instr_F0_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
// lock: Ignored
analyze_step_handle_prefix(cpu, analysis)
}
pub fn instr_F2_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
cpu.prefixes |= PREFIX_F2;
analyze_step_handle_prefix(cpu, analysis)
}
pub fn instr_F3_analyze(cpu: &mut CpuContext, analysis: &mut Analysis) {
cpu.prefixes |= PREFIX_F3;
analyze_step_handle_prefix(cpu, analysis)
}
pub fn modrm_analyze(ctx: &mut CpuContext, modrm_byte: u8) { modrm::skip(ctx, modrm_byte); }
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