Make exception table arch-agnostic

osdk/src/base_crate/x86_64.ld.template

@@ -95,7 +95,7 @@ SECTIONS
     # The section to store exception table (ExTable).
     # This table is used for recovering from specific exception handling faults
     # occurring at known points in the code.
-    # Ref: /aster-frame/src/arch/x86/ex_table.rs
+    # Ref: /ostd/src/ex_table.rs
     .ex_table               : AT(ADDR(.ex_table) - KERNEL_VMA) {
         __ex_table = .;
         KEEP(*(SORT(.ex_table)))

ostd/src/arch/x86/mod.rs

@@ -5,7 +5,6 @@
 pub(crate) mod boot;
 pub mod cpu;
 pub mod device;
-pub(crate) mod ex_table;
 pub(crate) mod io;
 pub(crate) mod iommu;
 pub mod irq;

ostd/src/arch/x86/trap/mod.rs

@@ -25,7 +25,7 @@ use cfg_if::cfg_if;
 use log::debug;
 use spin::Once;
 
-use super::{cpu::context::GeneralRegs, ex_table::ExTable};
+use super::cpu::context::GeneralRegs;
 use crate::{
     arch::{
         cpu::context::{CpuException, PageFaultErrorCode, RawPageFaultInfo},
@@ -33,6 +33,7 @@ use crate::{
         irq::{disable_local, enable_local, HwIrqLine},
     },
     cpu::PrivilegeLevel,
+    ex_table::ExTable,
     irq::call_irq_callback_functions,
     mm::{
         kspace::{KERNEL_PAGE_TABLE, LINEAR_MAPPING_BASE_VADDR, LINEAR_MAPPING_VADDR_RANGE},

ostd/src/ex_table.rs

@@ -61,6 +61,10 @@ impl ExTable {
     /// This function is generally used when an exception (such as a page fault) occurs.
     /// if the exception handling fails and there is a predefined recovery action,
     /// then the found recovery action will be taken.
+    #[cfg_attr(
+        any(target_arch = "riscv64", target_arch = "loongarch64"),
+        expect(unused)
+    )]
     pub fn find_recovery_inst_addr(inst_addr: Vaddr) -> Option<Vaddr> {
         let table_size = (__ex_table_end as usize - __ex_table as usize) / size_of::<ExTableItem>();
         // SAFETY: `__ex_table` is a static section consisting of `ExTableItem`.

ostd/src/lib.rs

@@ -37,6 +37,7 @@ pub mod bus;
 pub mod console;
 pub mod cpu;
 mod error;
+mod ex_table;
 pub mod io;
 pub mod irq;
 pub mod logger;