feat(ld_so/tcb): implement os_arch_activate for aarch64 linux

Signed-off-by: Anhad Singh <andypython@protonmail.com>
2025-12-01 14:35:10 +11:00
parent 6262c4ae50
commit 4f1920ab96
1 changed files with 13 additions and 0 deletions
@@ -343,6 +343,19 @@ impl Tcb {
        }
    }

+    #[cfg(all(target_os = "linux", target_arch = "aarch64"))]
+    unsafe fn os_arch_activate(_os: &(), tls_end: usize, tls_len: usize) {
+        // Uses ABI page
+        let abi_ptr = tls_end - tls_len - 16;
+        unsafe {
+            core::ptr::write(abi_ptr as *mut usize, tls_end);
+            core::arch::asm!(
+                "msr tpidr_el0, {}",
+                in(reg) abi_ptr,
+            );
+        }
+    }
+
    #[cfg(target_os = "redox")]
    unsafe fn os_arch_activate(
        os: &OsSpecific,