arch: arm64: use symtab to print function name in stack trace

Selecting `CONFIG_SYMTAB` will
enable the symtab generation which will be used in the
stack trace to print the function name of the return
address.

Added `arm64` to the `arch.common.stack_unwind.symtab` test.

Signed-off-by: Yong Cong Sin <ycsin@meta.com>

arch/arm64/core/fatal.c

@@ -13,6 +13,7 @@
  * exceptions
  */
 
+#include <zephyr/debug/symtab.h>
 #include <zephyr/drivers/pm_cpu_ops.h>
 #include <zephyr/arch/common/exc_handle.h>
 #include <zephyr/kernel.h>
@@ -224,8 +225,16 @@ static void esf_unwind(const z_arch_esf_t *esf)
 	LOG_ERR("");
 	while (fp != NULL) {
 		lr = fp[1];
+#ifdef CONFIG_SYMTAB
+		uint32_t offset = 0;
+		const char *name = symtab_find_symbol_name(lr, &offset);
+
+		LOG_ERR("backtrace %2d: fp: 0x%016llx lr: 0x%016llx [%s+0x%x]",
+			 count++, (uint64_t) fp, lr, name, offset);
+#else
 		LOG_ERR("backtrace %2d: fp: 0x%016llx lr: 0x%016llx",
 			 count++, (uint64_t) fp, lr);
+#endif
 		fp = (uint64_t *) fp[0];
 	}
 	LOG_ERR("");

doc/releases/release-notes-3.7.rst

@@ -71,6 +71,10 @@ Architectures
 
 * ARM
 
+* ARM64
+
+  * Implemented symbol names in the backtraces, enable by selecting :kconfig:option:`CONFIG_SYMTAB`
+
 * RISC-V
 
   * The fatal error message triggered from a fault now contains the callee-saved-registers states.

tests/arch/common/stack_unwind/testcase.yaml

@@ -53,9 +53,11 @@ tests:
   arch.common.stack_unwind.symtab:
     arch_allow:
       - riscv
+      - arm64
     integration_platforms:
       - qemu_riscv32
       - qemu_riscv64
+      - qemu_cortex_a53
     extra_args: OVERLAY_CONFIG="enable_fp.conf"
     harness_config:
       type: multi_line