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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| use crate::{Address, MemoryRangeFlags, Process}; | ||
|
|
||
| #[derive(Copy, Clone, Debug, PartialEq, Eq)] | ||
| pub struct State { | ||
| base_addr: Address, | ||
| } | ||
|
|
||
| impl State { | ||
| pub fn find_ram(&mut self, game: &Process) -> Option<[Address; 2]> { | ||
| self.base_addr = game.get_module_address("mgba.dll").ok()?; | ||
|
|
||
| let addr = game | ||
| .memory_ranges() | ||
| .find(|range| { | ||
| range.size().is_ok_and(|size| size == 0x48000) | ||
| && range.flags().is_ok_and(|flag| { | ||
| flag.contains(MemoryRangeFlags::WRITE | MemoryRangeFlags::READ) | ||
| }) | ||
| })? | ||
| .address() | ||
| .ok()?; | ||
|
|
||
| Some([addr, addr + 0x40000]) | ||
| } | ||
|
|
||
| pub fn keep_alive(&self, game: &Process, ram_base: &Option<[Address; 2]>) -> bool { | ||
| ram_base.is_some_and(|[ewram, _]| game.read::<u8>(ewram).is_ok()) | ||
| && game.read::<u8>(self.base_addr).is_ok() | ||
| } | ||
|
|
||
| pub const fn new() -> Self { | ||
| Self { | ||
| base_addr: Address::NULL, | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| use crate::{file_format::pe, signature::Signature, Address, Address32, Address64, Error, Process}; | ||
|
|
||
| #[derive(Copy, Clone, Debug, PartialEq, Eq)] | ||
| pub struct State { | ||
| cached_ewram_pointer: Address, | ||
| cached_iwram_pointer: Address, | ||
| is_64_bit: bool, | ||
| } | ||
|
|
||
| impl State { | ||
| pub fn find_ram(&mut self, game: &Process) -> Option<[Address; 2]> { | ||
| let main_module_range = super::PROCESS_NAMES | ||
| .iter() | ||
| .filter(|(_, state)| matches!(state, super::State::Mednafen(_))) | ||
| .find_map(|(name, _)| game.get_module_range(name).ok())?; | ||
|
|
||
| self.is_64_bit = | ||
| pe::MachineType::read(game, main_module_range.0) == Some(pe::MachineType::X86_64); | ||
|
|
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| if self.is_64_bit { | ||
| self.cached_ewram_pointer = { | ||
| const SIG: Signature<13> = Signature::new("48 8B 05 ?? ?? ?? ?? 81 E1 FF FF 03 00"); | ||
| let ptr: Address = SIG.scan_process_range(game, main_module_range)? + 3; | ||
| let mut addr: Address = ptr + 0x4 + game.read::<i32>(ptr).ok()?; | ||
|
|
||
| if game.read::<u8>(ptr + 10).ok()? == 0x48 { | ||
| addr = game.read::<Address64>(addr).ok()?.into(); | ||
| if addr.is_null() { | ||
| return None; | ||
| } | ||
| } | ||
|
|
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| addr | ||
| }; | ||
|
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|
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| self.cached_iwram_pointer = { | ||
| const SIG2: Signature<13> = Signature::new("48 8B 05 ?? ?? ?? ?? 81 E1 FF 7F 00 00"); | ||
| let ptr: Address = SIG2.scan_process_range(game, main_module_range)? + 3; | ||
| let mut addr: Address = ptr + 0x4 + game.read::<i32>(ptr).ok()?; | ||
|
|
||
| if game.read::<u8>(ptr + 10).ok()? == 0x48 { | ||
| addr = game.read::<Address64>(addr).ok()?.into(); | ||
| if addr.is_null() { | ||
| return None; | ||
| } | ||
| } | ||
|
|
||
| addr | ||
| }; | ||
|
|
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| let ewram = game.read::<Address64>(self.cached_ewram_pointer).ok()?; | ||
| let iwram = game.read::<Address64>(self.cached_iwram_pointer).ok()?; | ||
|
|
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| Some([ewram.into(), iwram.into()]) | ||
| } else { | ||
| self.cached_ewram_pointer = { | ||
| const SIG: Signature<11> = Signature::new("A1 ?? ?? ?? ?? 81 ?? FF FF 03 00"); | ||
| let ptr = SIG.scan_process_range(game, main_module_range)?; | ||
| game.read::<Address32>(ptr + 1).ok()?.into() | ||
| }; | ||
|
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||
|
|
||
| self.cached_iwram_pointer = { | ||
| const SIG2: Signature<11> = Signature::new("A1 ?? ?? ?? ?? 81 ?? FF 7F 00 00"); | ||
| let ptr = SIG2.scan_process_range(game, main_module_range)?; | ||
| game.read::<Address32>(ptr + 1).ok()?.into() | ||
| }; | ||
|
|
||
| let ewram = game.read::<Address32>(self.cached_ewram_pointer).ok()?; | ||
| let iwram = game.read::<Address32>(self.cached_iwram_pointer).ok()?; | ||
|
|
||
| Some([ewram.into(), iwram.into()]) | ||
| } | ||
| } | ||
|
|
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| fn read_pointer(&self, game: &Process, address: Address) -> Result<Address, Error> { | ||
| Ok(match self.is_64_bit { | ||
| true => game.read::<Address64>(address)?.into(), | ||
| false => game.read::<Address32>(address)?.into(), | ||
| }) | ||
| } | ||
|
|
||
| pub fn keep_alive(&self, game: &Process, ram: &mut Option<[Address; 2]>) -> bool { | ||
| let ewram = match self.read_pointer(game, self.cached_ewram_pointer) { | ||
| Ok(x) => x, | ||
| _ => return false, | ||
| }; | ||
|
|
||
| let iwram = match self.read_pointer(game, self.cached_iwram_pointer) { | ||
| Ok(x) => x, | ||
| _ => return false, | ||
| }; | ||
|
|
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| *ram = Some([ewram, iwram]); | ||
| true | ||
| } | ||
|
|
||
| pub const fn new() -> Self { | ||
| Self { | ||
| cached_ewram_pointer: Address::NULL, | ||
| cached_iwram_pointer: Address::NULL, | ||
| is_64_bit: false, | ||
| } | ||
| } | ||
| } | ||
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