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uefi: fs: Implement FileType, FilePermissions and FileAttr
- In UEFI, both FileType and FilePermissions are represented by the attr bitfield.
- Using simple bools here since both are represented by a single bit.
- Add `FILE_PERMISSION` mask for constructing attribute while change permissions.
cc ````@nicholasbishop````
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Disable CFI for weakly linked syscalls
Currently, when enabling CFI via -Zsanitizer=cfi and executing e.g. std::sys::random::getrandom, we can observe a CFI violation. This is the case for all consumers of the std::sys::pal::weak::syscall macro, as it is defining weak functions which don't show up in LLVM IR metadata. CFI fails for all these functions.
Similar to other such cases in
https://github.com/rust-lang/rust/issues/115199, this change stops emitting the CFI typecheck for consumers of the macro via the `#[no_sanitize(cfi)]` attribute.
r? ``````@rcvalle``````
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Currently, when enabling CFI via -Zsanitizer=cfi and executing e.g.
std::sys::random::getrandom, we can observe a CFI violation. This is
the case for all consumers of the std::sys::pal::weak::weak macro,
as it is defining weak functions which don't show up in LLVM IR
metadata. CFI fails for all these functions.
Similar to other such cases in
https://github.com/rust-lang/rust/issues/115199, this change stops
emitting the CFI typecheck for consumers of the macro via the
\#[no_sanitize(cfi)] attribute.
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- Just the permission and file type.
- FileTimes will need some new conversion functions and thus will come
with a future PR. Trying to keep things simple here.
Signed-off-by: Ayush Singh <ayush@beagleboard.org>
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- Similar to FilePermissions, using bool to represent the bitfield.
- FileType cannot be changed, so no need to worry about converting back
to attribute.
Signed-off-by: Ayush Singh <ayush@beagleboard.org>
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- UEFI file permissions are indicated using a u64 bitfield used for
readonly/filetype, etc.
- Using normal bool with to and from attribute conversions to
FilePermission from overriding some other bitfields.
Signed-off-by: Ayush Singh <ayush@beagleboard.org>
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