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cpufeatures: Add support for AArch64 Android (essentially a Linux variant) #752

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Merged
merged 1 commit into from
Mar 18, 2022
Merged

cpufeatures: Add support for AArch64 Android (essentially a Linux variant) #752

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3 changes: 3 additions & 0 deletions cpufeatures/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -19,3 +19,6 @@ libc = "0.2.68"

[target.'cfg(all(target_arch = "aarch64", target_os = "linux"))'.dependencies]
libc = "0.2.68"

[target.aarch64-linux-android.dependencies]
libc = "0.2.68"
17 changes: 11 additions & 6 deletions cpufeatures/src/aarch64.rs
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Expand Up @@ -21,7 +21,7 @@ macro_rules! __unless_target_features {
}

// Linux runtime detection of target CPU features using `getauxval`.
#[cfg(target_os = "linux")]
#[cfg(any(target_os = "linux", target_os = "android"))]
#[macro_export]
#[doc(hidden)]
macro_rules! __detect_target_features {
Expand All @@ -32,7 +32,7 @@ macro_rules! __detect_target_features {
}

/// Linux helper function for calling `getauxval` to get `AT_HWCAP`.
#[cfg(target_os = "linux")]
#[cfg(any(target_os = "linux", target_os = "android"))]
pub fn getauxval_hwcap() -> u64 {
unsafe { libc::getauxval(libc::AT_HWCAP) }
}
Expand All @@ -48,7 +48,7 @@ macro_rules! __detect_target_features {
}

// Linux `expand_check_macro`
#[cfg(target_os = "linux")]
#[cfg(any(target_os = "linux", target_os = "android"))]
macro_rules! __expand_check_macro {
($(($name:tt, $hwcap:ident)),* $(,)?) => {
#[macro_export]
Expand All @@ -64,7 +64,7 @@ macro_rules! __expand_check_macro {
}

// Linux `expand_check_macro`
#[cfg(target_os = "linux")]
#[cfg(any(target_os = "linux", target_os = "android"))]
__expand_check_macro! {
("aes", AES), // Enable AES support.
("sha2", SHA2), // Enable SHA1 and SHA256 support.
Expand All @@ -78,7 +78,7 @@ __expand_check_macro! {
/// provide that mapping accordingly.
///
/// See this issue for more info: <https://github.com/RustCrypto/utils/issues/395>
#[cfg(target_os = "linux")]
#[cfg(any(target_os = "linux", target_os = "android"))]
pub mod hwcaps {
use libc::c_ulong;

Expand Down Expand Up @@ -167,7 +167,12 @@ macro_rules! check {
}

// On other targets, runtime CPU feature detection is unavailable
#[cfg(not(any(target_os = "ios", target_os = "linux", target_os = "macos")))]
#[cfg(not(any(
target_os = "ios",
target_os = "linux",
target_os = "android",
target_os = "macos"
)))]
#[macro_export]
#[doc(hidden)]
macro_rules! __detect_target_features {
Expand Down