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fix overflow

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mii
2023-07-05 15:19:27 +00:00
parent a922656a99
commit 79fda1a172
1 changed files with 4 additions and 4 deletions
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8
src/rv.rs
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@ -43,24 +43,24 @@ pub struct RV {
} }
extern "C" fn rv_load_cb(user: *mut c_void, addr: u32, data: *mut u8) -> u32 { extern "C" fn rv_load_cb(user: *mut c_void, addr: u32, data: *mut u8) -> u32 {
if (addr - 0x80000000) > 0x10000 { if (addr.wrapping_sub(0x80000000)) > 0x10000 {
return RV_BAD; return RV_BAD;
} }
unsafe { unsafe {
*data = *(user.offset((addr - 0x80000000) as isize) as *mut u8); *data = *(user.offset((addr.wrapping_sub(0x80000000)) as isize) as *mut u8);
} }
RV_OK RV_OK
} }
extern "C" fn rv_store_cb(user: *mut c_void, addr: u32, data: u8) -> u32 { extern "C" fn rv_store_cb(user: *mut c_void, addr: u32, data: u8) -> u32 {
if (addr - 0x80000000) > 0x10000 { if (addr.wrapping_sub(0x80000000)) > 0x10000 {
return RV_BAD; return RV_BAD;
} }
unsafe { unsafe {
*(user.offset((addr - 0x80000000) as isize) as *mut u8) = data; *(user.offset((addr.wrapping_sub(0x80000000)) as isize) as *mut u8) = data;
} }
RV_OK RV_OK