[SOLVED] aarch64/shared/vectors.s: Error: unaligned opcodes detected in executable segment after adding -g option in gnu as command

aarch64/shared/vectors.s: Error: unaligned opcodes detected in executable segment after adding -g option in gnu as command

I added -g option in aarch64-none-elf-as command to compile a file vector.s. This file is the exception vector for arm64 machine (see Table 4 in https://developer.arm.com/documentation/102412/0103/Handling-exceptions/Taking-an-exception ). Before the -g option, there was no problem, but with -g option, I see this error message:

aarch64/shared/vectors.s: Error: unaligned opcodes detected in executable segment

The whole vector table should be aligned by 0x800 and each entry should be aligned by 0x80 by the aarch64 architecture. And I don't think the debug information is inserted in the code area (by the way, the code sits in the section "vectors").
I tried to see what instructions are misaligned by this -g option and checked the assembler's options by aarch-none-elf-as --help but couldn't find any option that's likely to show this misalignment information. Is there any option that prints the addresses of instruction? (Because it errors out during the assembly, I cannot see the final map file or do objdump for the generated binary file.)
aarch64-none-elf-as --version shows

GNU assembler (GNU Toolchain for the Arm Architecture 11.2-2022.02 (arm-11.14)) 2.37.20220122

ADD : I made a reproducible simplest example from this. The reduced vectors.s file is like this. (only two vector entries).

        .section vectors, "ax", %progbits
        .global  vector_table

        .balign 0x800
vector_table:
curr_el_sp0_sync:
        b       curr_el_sp0_sync_vector
        adr     x0, 1f
        bl      print
        b       terminate
1:      .asciz "Unexpected exception: curr_el_sp0_sync\n"

        .balign 0x80
curr_el_sp0_irq:
        b       curr_el_sp0_irq_vector
        adr     x0, 1f
        bl      print
        b       terminate
1:      .asciz "Unexpected exception: curr_el_sp0_irq\n"

        .balign 0x80
print:
        ret
terminate:
        ret
        .balign 0x4
fail_str:       .asciz "** TEST FAILED**\n\004"
        .end

The command for assembling this file is like this (without -g option) and it assembles the code ok(produces vectors.o).

aarch64-none-elf-as -march=armv8.4-a+crc aarch64/shared/vectors.s -o aarch64/shared/vectors.o

The command with -g optino is like this (produces forementioned error).

aarch64-none-elf-as -march=armv8.4-a+crc aarch64/shared/vectors.s -g -o aarch64/shared/vectors.o

Solution

I found if I insert

.balign 0x80

before the last

.end

line, the error goes out. Probably the debug information had been inserted right after the code area and messed something up. So I'm making the debug information start in an aligned boundary.(??) And this works for original non-simplified code and now I can debug step-by-step through the assembly code!