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use crate::{emu::Emu, windows::structures::MemoryOperation};
impl Emu {
/// Push a dword to the stack and dec the esp
/// This will return false if stack pointer is pointing to non allocated place.
pub fn stack_push32(&mut self, value: u32) -> bool {
if self.cfg.stack_trace {
log::trace!("--- stack push32 ---");
self.maps.dump_dwords(self.regs().get_esp(), 5);
}
if self.cfg.trace_mem {
let name = self
.maps
.get_addr_name(self.regs().get_esp())
.unwrap_or_else(|| "not mapped");
let memory_operation = MemoryOperation {
pos: self.pos,
rip: self.regs().rip,
op: "write".to_string(),
bits: 32,
address: self.regs().get_esp() - 4,
old_value: self.maps.read_dword(self.regs().get_esp()).unwrap_or(0) as u64,
new_value: value as u64,
name: name.to_string(),
};
self.memory_operations.push(memory_operation);
log::trace!("\tmem_trace: pos = {} rip = {:x} op = write bits = {} address = 0x{:x} value = 0x{:x} name = '{}'",
self.pos, self.regs().rip, 32, self.regs().get_esp(), value, name);
}
let esp = self.regs().get_esp() - 4;
self.regs_mut().set_esp(esp);
//self.stack_lvl[self.stack_lvl_idx] += 1;
//log::trace!("push32 stack level is {} deep {}", self.stack_lvl[self.stack_lvl_idx], self.stack_lvl_idx);
/*
let stack = self.maps.get_mem("stack");
if stack.inside(self.regs().get_esp()) {
if !self.maps.write_dword(self.regs().get_esp(), value) {
//if !stack.write_dword(self.regs().get_esp(), value) {
return false;
}
} else {
let mem = match self.maps.get_mem_by_addr(self.regs().get_esp()) {
Some(m) => m,
None => {
log::trace!(
"/!\\ pushing stack outside maps esp: 0x{:x}",
self.regs().get_esp()
);
Console::spawn_console(self);
return false;
}
};
if !self.maps.write_dword(self.regs().get_esp(), value) {
//if !mem.write_dword(self.regs().get_esp(), value) {
return false;
}
}*/
if self.maps.write_dword(self.regs().get_esp(), value) {
true
} else {
log::trace!(
"/!\\ pushing in non mapped mem 0x{:x}",
self.regs().get_esp()
);
false
}
}
/// Push a qword to the stack and dec the stack pointer.
/// Works for both x86_64 (rsp) and aarch64 (sp).
/// This will return false if stack pointer is pointing to non allocated place.
pub fn stack_push64(&mut self, value: u64) -> bool {
let sp = self.sp();
if self.cfg.stack_trace {
log::trace!("--- stack push64 ---");
self.maps.dump_qwords(sp, 5);
}
if self.cfg.trace_mem {
let pc = self.pc();
let name = self
.maps
.get_addr_name(sp)
.unwrap_or_else(|| "not mapped");
let memory_operation = MemoryOperation {
pos: self.pos,
rip: pc,
op: "write".to_string(),
bits: 64,
address: sp - 8,
old_value: self.maps.read_qword(sp).unwrap_or(0),
new_value: value,
name: name.to_string(),
};
self.memory_operations.push(memory_operation);
log::trace!("\tmem_trace: pos = {} rip = {:x} op = write bits = {} address = 0x{:x} value = 0x{:x} name = '{}'", self.pos, pc, 64, sp, value, name);
}
let new_sp = sp - 8;
self.set_sp(new_sp);
if self.maps.write_qword(new_sp, value) {
true
} else {
log::trace!("/!\\ pushing in non mapped mem 0x{:x}", new_sp);
false
}
}
/// Pop a dword from stack and return it, None if esp points to unmapped zone.
pub fn stack_pop32(&mut self, pop_instruction: bool) -> Option<u32> {
if self.cfg.stack_trace {
log::trace!("--- stack pop32 ---");
self.maps.dump_dwords(self.regs().get_esp(), 5);
}
/*
let stack = self.maps.get_mem("stack");
if stack.inside(self.regs().get_esp()) {
//let value = stack.read_dword(self.regs().get_esp());
let value = match self.maps.read_dword(self.regs().get_esp()) {
Some(v) => v,
None => {
log::trace!("esp out of stack");
return None;
}
};
if self.cfg.verbose >= 1
&& pop_instruction
&& self.maps.get_mem("code").inside(value.into())
{
log::trace!("/!\\ poping a code address 0x{:x}", value);
}
let esp = self.regs().get_esp() + 4;
self.regs_mut().set_esp(esp);
return Some(value);
}
let mem = match self.maps.get_mem_by_addr(self.regs().get_esp()) {
Some(m) => m,
None => {
log::trace!(
"poping stack outside map esp: 0x{:x}",
self.regs().get_esp() as u32
);
Console::spawn_console(self);
return None;
}
};*/
let value = match self.maps.read_dword(self.regs().get_esp()) {
Some(v) => v,
None => {
log::trace!("esp point to non mapped mem");
return None;
}
};
/* walking mems in very pop is slow, and now we are not using "code" map
if self.cfg.verbose >= 1
&& pop_instruction
&& self.maps.get_mem("code").inside(value.into())
{
log::trace!("/!\\ poping a code address 0x{:x}", value);
}
*/
if self.cfg.trace_mem {
// Record the read from stack memory
let name = self
.maps
.get_addr_name(self.regs().get_esp())
.unwrap_or_else(|| "not mapped");
let read_operation = MemoryOperation {
pos: self.pos,
rip: self.regs().rip,
op: "read".to_string(),
bits: 32,
address: self.regs().get_esp(),
old_value: 0, // not needed for read
new_value: value as u64,
name: name.to_string(),
};
self.memory_operations.push(read_operation);
log::trace!("\tmem_trace: pos = {} rip = {:x} op = read bits = {} address = 0x{:x} value = 0x{:x} name = '{}'",
self.pos, self.regs().rip, 32, self.regs().get_esp(), value, name);
// Record the write to register
let write_operation = MemoryOperation {
pos: self.pos,
rip: self.regs().rip,
op: "write".to_string(),
bits: 32,
address: self.regs().get_esp(),
old_value: self.maps.read_dword(self.regs().get_esp()).unwrap_or(0) as u64,
new_value: value as u64, // new value being written
name: "register".to_string(),
};
self.memory_operations.push(write_operation);
log::trace!("\tmem_trace: pos = {} rip = {:x} op = write bits = {} address = 0x{:x} value = 0x{:x} name = 'register'",
self.pos, self.regs().rip, 32, self.regs().get_esp(), value);
}
let esp = self.regs().get_esp() + 4;
self.regs_mut().set_esp(esp);
//self.stack_lvl[self.stack_lvl_idx] -= 1;
//log::trace!("pop32 stack level is {} deep {}", self.stack_lvl[self.stack_lvl_idx], self.stack_lvl_idx);
Some(value)
}
/// Pop a qword from stack, return None if cannot read the stack pointer address.
/// Works for both x86_64 (rsp) and aarch64 (sp).
pub fn stack_pop64(&mut self, pop_instruction: bool) -> Option<u64> {
let sp = self.sp();
if self.cfg.stack_trace {
log::trace!("--- stack pop64 ---");
self.maps.dump_qwords(sp, 5);
}
let value = match self.maps.read_qword(sp) {
Some(v) => v,
None => {
log::trace!("stack pointer points to non mapped mem");
return None;
}
};
if self.cfg.trace_mem {
let pc = self.pc();
let name = self
.maps
.get_addr_name(sp)
.unwrap_or_else(|| "not mapped");
let read_operation = MemoryOperation {
pos: self.pos,
rip: pc,
op: "read".to_string(),
bits: 64,
address: sp,
old_value: 0,
new_value: value,
name: name.to_string(),
};
self.memory_operations.push(read_operation);
log::trace!("\tmem_trace: pos = {} rip = {:x} op = read bits = {} address = 0x{:x} value = 0x{:x} name = '{}'",
self.pos, pc, 64, sp, value, name);
let write_operation = MemoryOperation {
pos: self.pos,
rip: pc,
op: "write".to_string(),
bits: 64,
address: sp,
old_value: self.maps.read_qword(sp).unwrap_or(0),
new_value: value,
name: "register".to_string(),
};
self.memory_operations.push(write_operation);
log::trace!("\tmem_trace: pos = {} rip = {:x} op = write bits = {} address = 0x{:x} value = 0x{:x} name = 'register'",
self.pos, pc, 64, sp, value);
}
self.set_sp(sp + 8);
Some(value)
}
}