mlokis/ableos-framebuffer
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Fixed some panics and some UB

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This commit is contained in:
Erin 2023-11-08 12:38:14 +01:00
parent a7c4379976
commit 398687d8bf
1 changed files with 41 additions and 26 deletions
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67
hbvm/src/vmrun.rs
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@ -80,17 +80,18 @@ where
AND => self.binary_op::<u64>(ops::BitAnd::bitand),
OR => self.binary_op::<u64>(ops::BitOr::bitor),
XOR => self.binary_op::<u64>(ops::BitXor::bitxor),
SLU8 => self.binary_op::<u8>(ops::Shl::shl),
SLU16 => self.binary_op::<u16>(ops::Shl::shl),
SLU32 => self.binary_op::<u32>(ops::Shl::shl),
SLU64 => self.binary_op::<u64>(ops::Shl::shl),
SRU8 => self.binary_op::<u8>(ops::Shr::shr),
SRU16 => self.binary_op::<u16>(ops::Shr::shr),
SRU32 => self.binary_op::<u32>(ops::Shr::shr),
SRS8 => self.binary_op::<u64>(ops::Shr::shr),
SRS16 => self.binary_op::<i8>(ops::Shr::shr),
SRS32 => self.binary_op::<i16>(ops::Shr::shr),
SRS64 => self.binary_op::<i64>(ops::Shr::shr),
SLU8 => self.binary_op_shift::<u8>(u8::wrapping_shl),
SLU16 => self.binary_op_shift::<u16>(u16::wrapping_shl),
SLU32 => self.binary_op_shift::<u32>(u32::wrapping_shl),
SLU64 => self.binary_op_shift::<u64>(u64::wrapping_shl),
SRU8 => self.binary_op_shift::<u8>(u8::wrapping_shr),
SRU16 => self.binary_op_shift::<u16>(u16::wrapping_shr),
SRU32 => self.binary_op_shift::<u32>(u32::wrapping_shr),
SRU64 => self.binary_op_shift::<u64>(u64::wrapping_shr),
SRS8 => self.binary_op_shift::<i8>(i8::wrapping_shr),
SRS16 => self.binary_op_shift::<i16>(i16::wrapping_shr),
SRS32 => self.binary_op_shift::<i32>(i32::wrapping_shr),
SRS64 => self.binary_op_shift::<i64>(i64::wrapping_shr),
CMPU => handler!(self, |OpsRRR(tg, a0, a1)| self.cmp(
tg,
a0,
@ -137,18 +138,18 @@ where
ANDI => self.binary_op_imm::<u64>(ops::BitAnd::bitand),
ORI => self.binary_op_imm::<u64>(ops::BitOr::bitor),
XORI => self.binary_op_imm::<u64>(ops::BitXor::bitxor),
SLUI8 => self.binary_op_ims::<u8>(ops::Shl::shl),
SLUI16 => self.binary_op_ims::<u16>(ops::Shl::shl),
SLUI32 => self.binary_op_ims::<u32>(ops::Shl::shl),
SLUI64 => self.binary_op_ims::<u64>(ops::Shl::shl),
SRUI8 => self.binary_op_ims::<u8>(ops::Shr::shr),
SRUI16 => self.binary_op_ims::<u16>(ops::Shr::shr),
SRUI32 => self.binary_op_ims::<u32>(ops::Shr::shr),
SRUI64 => self.binary_op_ims::<u64>(ops::Shr::shr),
SRSI8 => self.binary_op_ims::<i8>(ops::Shr::shr),
SRSI16 => self.binary_op_ims::<i16>(ops::Shr::shr),
SRSI32 => self.binary_op_ims::<i32>(ops::Shr::shr),
SRSI64 => self.binary_op_ims::<i64>(ops::Shr::shr),
SLUI8 => self.binary_op_ims::<u8>(u8::wrapping_shl),
SLUI16 => self.binary_op_ims::<u16>(u16::wrapping_shl),
SLUI32 => self.binary_op_ims::<u32>(u32::wrapping_shl),
SLUI64 => self.binary_op_ims::<u64>(u64::wrapping_shl),
SRUI8 => self.binary_op_ims::<u8>(u8::wrapping_shr),
SRUI16 => self.binary_op_ims::<u16>(u16::wrapping_shr),
SRUI32 => self.binary_op_ims::<u32>(u32::wrapping_shr),
SRUI64 => self.binary_op_ims::<u64>(u64::wrapping_shr),
SRSI8 => self.binary_op_ims::<i8>(i8::wrapping_shr),
SRSI16 => self.binary_op_ims::<i16>(i16::wrapping_shr),
SRSI32 => self.binary_op_ims::<i32>(i32::wrapping_shr),
SRSI64 => self.binary_op_ims::<i64>(i64::wrapping_shr),
CMPUI => handler!(self, |OpsRRD(tg, a0, imm)| { self.cmp(tg, a0, imm) }),
CMPSI => handler!(self, |OpsRRD(tg, a0, imm)| { self.cmp(tg, a0, imm as i64) }),
CP => handler!(self, |OpsRR(tg, a0)| self.write_reg(tg, self.read_reg(a0))),
@ -404,7 +405,7 @@ where
.as_mut_ptr()
.add(usize::from(dst) + usize::from(n))
.cast(),
usize::from(count).wrapping_sub(n.into()),
usize::from(count).saturating_sub(n.into()),
)?;
Ok(())
@ -456,9 +457,23 @@ where
/// Perform binary operation over register and shift immediate
#[inline(always)]
unsafe fn binary_op_ims<T: ValueVariant>(&mut self, op: impl Fn(T, u8) -> T) {
unsafe fn binary_op_shift<T: ValueVariant>(&mut self, op: impl Fn(T, u32) -> T) {
let OpsRRR(tg, a0, a1) = self.decode();
self.write_reg(
tg,
op(
self.read_reg(a0).cast::<T>(),
self.read_reg(a1).cast::<u32>(),
),
);
self.bump_pc::<OpsRRR, true>();
}
/// Perform binary operation over register and shift immediate
#[inline(always)]
unsafe fn binary_op_ims<T: ValueVariant>(&mut self, op: impl Fn(T, u32) -> T) {
let OpsRRB(tg, reg, imm) = self.decode();
self.write_reg(tg, op(self.read_reg(reg).cast::<T>(), imm));
self.write_reg(tg, op(self.read_reg(reg).cast::<T>(), imm.into()));
self.bump_pc::<OpsRRW, true>();
}