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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /library/stdarch/crates/std_detect/src/detect/os/linux/mod.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | library/stdarch/crates/std_detect/src/detect/os/linux/mod.rs | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/library/stdarch/crates/std_detect/src/detect/os/linux/mod.rs b/library/stdarch/crates/std_detect/src/detect/os/linux/mod.rs new file mode 100644 index 000000000..a49a72783 --- /dev/null +++ b/library/stdarch/crates/std_detect/src/detect/os/linux/mod.rs @@ -0,0 +1,64 @@ +//! Run-time feature detection on Linux +//! +#[cfg(feature = "std_detect_file_io")] +use alloc::vec::Vec; + +mod auxvec; + +#[cfg(feature = "std_detect_file_io")] +mod cpuinfo; + +#[cfg(feature = "std_detect_file_io")] +fn read_file(path: &str) -> Result<Vec<u8>, ()> { + let mut path = Vec::from(path.as_bytes()); + path.push(0); + + unsafe { + let file = libc::open(path.as_ptr() as *const libc::c_char, libc::O_RDONLY); + if file == -1 { + return Err(()); + } + + let mut data = Vec::new(); + loop { + data.reserve(4096); + let spare = data.spare_capacity_mut(); + match libc::read(file, spare.as_mut_ptr() as *mut _, spare.len()) { + -1 => { + libc::close(file); + return Err(()); + } + 0 => break, + n => data.set_len(data.len() + n as usize), + } + } + + libc::close(file); + Ok(data) + } +} + +cfg_if::cfg_if! { + if #[cfg(target_arch = "aarch64")] { + mod aarch64; + pub(crate) use self::aarch64::detect_features; + } else if #[cfg(target_arch = "arm")] { + mod arm; + pub(crate) use self::arm::detect_features; + } else if #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))] { + mod riscv; + pub(crate) use self::riscv::detect_features; + } else if #[cfg(any(target_arch = "mips", target_arch = "mips64"))] { + mod mips; + pub(crate) use self::mips::detect_features; + } else if #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))] { + mod powerpc; + pub(crate) use self::powerpc::detect_features; + } else { + use crate::detect::cache; + /// Performs run-time feature detection. + pub(crate) fn detect_features() -> cache::Initializer { + cache::Initializer::default() + } + } +} |