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fix newer getrandom on Windows

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This commit is contained in:
Ralf Jung 2021-04-04 11:41:04 +02:00
parent 0f7c01527a
commit 20e31dbdad
1 changed files with 17 additions and 1 deletions
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18
src/shims/windows/foreign_items.rs
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@ -282,14 +282,30 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
// Miscellaneous
"SystemFunction036" => {
// This is really 'RtlGenRandom'.
check_abi(abi, Abi::System { unwind: false })?;
// The actual name of 'RtlGenRandom'
let &[ref ptr, ref len] = check_arg_count(args)?;
let ptr = this.read_scalar(ptr)?.check_init()?;
let len = this.read_scalar(len)?.to_u32()?;
this.gen_random(ptr, len.into())?;
this.write_scalar(Scalar::from_bool(true), dest)?;
}
"BCryptGenRandom" => {
check_abi(abi, Abi::System { unwind: false })?;
let &[ref algorithm, ref ptr, ref len, ref flags] = check_arg_count(args)?;
let algorithm = this.read_scalar(algorithm)?;
let ptr = this.read_scalar(ptr)?.check_init()?;
let len = this.read_scalar(len)?.to_u32()?;
let flags = this.read_scalar(flags)?.to_u32()?;
if flags != 2 { // BCRYPT_USE_SYSTEM_PREFERRED_RNG
throw_unsup_format!("BCryptGenRandom is supported only with the BCRYPT_USE_SYSTEM_PREFERRED_RNG flag");
}
if algorithm.to_machine_usize(this)? != 0 {
throw_unsup_format!("BCryptGenRandom algorithm must be NULL when the flag is BCRYPT_USE_SYSTEM_PREFERRED_RNG");
}
this.gen_random(ptr, len.into())?;
this.write_null(dest)?; // STATUS_SUCCESS
}
"GetConsoleScreenBufferInfo" => {
check_abi(abi, Abi::System { unwind: false })?;
// `term` needs this, so we fake it.