diff options
Diffstat (limited to 'vendor/rustix/src/imp/libc/param/auxv.rs')
-rw-r--r-- | vendor/rustix/src/imp/libc/param/auxv.rs | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/vendor/rustix/src/imp/libc/param/auxv.rs b/vendor/rustix/src/imp/libc/param/auxv.rs new file mode 100644 index 000000000..584329da9 --- /dev/null +++ b/vendor/rustix/src/imp/libc/param/auxv.rs @@ -0,0 +1,66 @@ +use super::super::c; +#[cfg(any( + all(target_os = "android", target_pointer_width = "64"), + target_os = "linux", +))] +use crate::ffi::CStr; + +// `getauxval` wasn't supported in glibc until 2.16. +#[cfg(any( + all(target_os = "android", target_pointer_width = "64"), + target_os = "linux", +))] +weak!(fn getauxval(c::c_ulong) -> *mut c::c_void); + +#[inline] +pub(crate) fn page_size() -> usize { + unsafe { c::sysconf(c::_SC_PAGESIZE) as usize } +} + +#[cfg(not(target_os = "wasi"))] +#[inline] +pub(crate) fn clock_ticks_per_second() -> u64 { + unsafe { c::sysconf(c::_SC_CLK_TCK) as u64 } +} + +#[cfg(any( + all(target_os = "android", target_pointer_width = "64"), + target_os = "linux", +))] +#[inline] +pub(crate) fn linux_hwcap() -> (usize, usize) { + if let Some(libc_getauxval) = getauxval.get() { + unsafe { + let hwcap = libc_getauxval(c::AT_HWCAP) as usize; + let hwcap2 = libc_getauxval(c::AT_HWCAP2) as usize; + (hwcap, hwcap2) + } + } else { + (0, 0) + } +} + +#[cfg(any( + all(target_os = "android", target_pointer_width = "64"), + target_os = "linux", +))] +#[inline] +pub(crate) fn linux_execfn() -> &'static CStr { + if let Some(libc_getauxval) = getauxval.get() { + unsafe { CStr::from_ptr(libc_getauxval(c::AT_EXECFN).cast()) } + } else { + cstr!("") + } +} + +/// Initialize process-wide state. +#[cfg(any( + target_vendor = "mustang", + not(any(target_env = "gnu", target_env = "musl")), +))] +#[inline] +#[doc(hidden)] +pub(crate) unsafe fn init(_envp: *mut *mut u8) { + // Nothing to do. This is the libc backend, and libc does the + // initialization for us. +} |