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Avoid using rbx in SGX inline assembly since it is reserved

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This commit is contained in:
Amanieu d'Antras
2021-04-30 18:27:12 +01:00
parent e6a731eb90
commit 09cfb248e7
1 changed files with 8 additions and 2 deletions
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10
library/std/src/sys/sgx/ext/arch.rs
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@@ -32,9 +32,12 @@ pub fn egetkey(request: &Align512<[u8; 512]>) -> Result<Align16<[u8; 16]>, u32>
let error; let error;
asm!( asm!(
// rbx is reserved by LLVM
"xchg {}, rbx",
"enclu", "enclu",
"mov rbx, {}",
inout(reg) request => _,
inlateout("eax") ENCLU_EGETKEY => error, inlateout("eax") ENCLU_EGETKEY => error,
in("rbx") request,
in("rcx") out.as_mut_ptr(), in("rcx") out.as_mut_ptr(),
options(nostack), options(nostack),
); );
@@ -60,9 +63,12 @@ pub fn ereport(
let mut report = MaybeUninit::uninit(); let mut report = MaybeUninit::uninit();
asm!( asm!(
// rbx is reserved by LLVM
"xchg {}, rbx",
"enclu", "enclu",
"mov rbx, {}",
inout(reg) targetinfo => _,
in("eax") ENCLU_EREPORT, in("eax") ENCLU_EREPORT,
in("rbx") targetinfo,
in("rcx") reportdata, in("rcx") reportdata,
in("rdx") report.as_mut_ptr(), in("rdx") report.as_mut_ptr(),
options(preserves_flags, nostack), options(preserves_flags, nostack),