bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Add SafeStack support to rustc

Browse source 
Adds support for LLVM [SafeStack] which provides backward edge control
flow protection by separating the stack into two parts: data which is
only accessed in provable safe ways is allocated on the normal stack
(the "safe stack") and all other data is placed in a separate allocation
(the "unsafe stack").

SafeStack support is enabled by passing `-Zsanitizer=safestack`.

[SafeStack]: https://clang.llvm.org/docs/SafeStack.html
This commit is contained in:
Wesley Wiser 2023-05-19 19:30:15 -04:00
parent d22314e0f5
commit 019d75b44e
14 changed files with 71 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

4
compiler/rustc_target/src/spec/mod.rs
View file

@ -815,6 +815,7 @@ bitflags::bitflags! {
const SHADOWCALLSTACK = 1 << 7;
const KCFI = 1 << 8;
const KERNELADDRESS = 1 << 9;
const SAFESTACK = 1 << 10;
}
}
@ -831,6 +832,7 @@ impl SanitizerSet {
SanitizerSet::LEAK => "leak",
SanitizerSet::MEMORY => "memory",
SanitizerSet::MEMTAG => "memtag",
SanitizerSet::SAFESTACK => "safestack",
SanitizerSet::SHADOWCALLSTACK => "shadow-call-stack",
SanitizerSet::THREAD => "thread",
SanitizerSet::HWADDRESS => "hwaddress",
@ -871,6 +873,7 @@ impl IntoIterator for SanitizerSet {
SanitizerSet::THREAD,
SanitizerSet::HWADDRESS,
SanitizerSet::KERNELADDRESS,
SanitizerSet::SAFESTACK,
]
.iter()
.copied()
@ -2364,6 +2367,7 @@ impl Target {
Some("leak") => SanitizerSet::LEAK,
Some("memory") => SanitizerSet::MEMORY,
Some("memtag") => SanitizerSet::MEMTAG,
Some("safestack") => SanitizerSet::SAFESTACK,
Some("shadow-call-stack") => SanitizerSet::SHADOWCALLSTACK,
Some("thread") => SanitizerSet::THREAD,
Some("hwaddress") => SanitizerSet::HWADDRESS,