$ gdb vmlinux 
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Reading symbols from vmlinux...
(gdb) disassemble acpi_ns_validate_handle 
Dump of assembler code for function acpi_ns_validate_handle:
   0xffffffff815781cd <+0>:     call   0xffffffff81062c40 <__fentry__>
   0xffffffff815781d2 <+5>:     push   %r12
   0xffffffff815781d4 <+7>:     mov    %rdi,%r12
   0xffffffff815781d7 <+10>:    call   0xffffffff81584969 <acpi_ut_track_stack_ptr>
   0xffffffff815781dc <+15>:    lea    -0x1(%r12),%rax
   0xffffffff815781e1 <+20>:    cmp    $0xfffffffffffffffd,%rax
   0xffffffff815781e5 <+24>:    jbe    0xffffffff815781f0 <acpi_ns_validate_handle+35>
   0xffffffff815781e7 <+26>:    mov    0x189b44a(%rip),%r12        # 0xffffffff82e13638 <acpi_gbl_root_node>
   0xffffffff815781ee <+33>:    jmp    0xffffffff815781fb <acpi_ns_validate_handle+46>
   0xffffffff815781f0 <+35>:    cmpb   $0xf,0x8(%r12)
   0xffffffff815781f6 <+41>:    je     0xffffffff815781fb <acpi_ns_validate_handle+46>
   0xffffffff815781f8 <+43>:    xor    %r12d,%r12d
   0xffffffff815781fb <+46>:    mov    %r12,%rax
   0xffffffff815781fe <+49>:    pop    %r12
   0xffffffff81578200 <+51>:    ret    
End of assembler dump.
(gdb) disassemble acpi_ut_track_stack_ptr 
Dump of assembler code for function acpi_ut_track_stack_ptr:
   0xffffffff81584969 <+0>:     call   0xffffffff81062c40 <__fentry__>
   0xffffffff8158496e <+5>:     sub    $0x10,%rsp
   0xffffffff81584972 <+9>:     mov    %gs:0x28,%rax
   0xffffffff8158497b <+18>:    mov    %rax,0x8(%rsp)
   0xffffffff81584980 <+23>:    mov    %rsp,%rax
   0xffffffff81584983 <+26>:    cmp    %rax,0x188ec86(%rip)        # 0xffffffff82e13610 <acpi_gbl_lowest_stack_pointer>
   0xffffffff8158498a <+33>:    jbe    0xffffffff81584993 <acpi_ut_track_stack_ptr+42>
   0xffffffff8158498c <+35>:    mov    %rax,0x188ec7d(%rip)        # 0xffffffff82e13610 <acpi_gbl_lowest_stack_pointer>
   0xffffffff81584993 <+42>:    mov    0x188ec6b(%rip),%eax        # 0xffffffff82e13604 <acpi_gbl_nesting_level>
   0xffffffff81584999 <+48>:    cmp    0x188ec69(%rip),%eax        # 0xffffffff82e13608 <acpi_gbl_deepest_nesting>
   0xffffffff8158499f <+54>:    jbe    0xffffffff815849a7 <acpi_ut_track_stack_ptr+62>
   0xffffffff815849a1 <+56>:    mov    %eax,0x188ec61(%rip)        # 0xffffffff82e13608 <acpi_gbl_deepest_nesting>
   0xffffffff815849a7 <+62>:    mov    0x8(%rsp),%rax
   0xffffffff815849ac <+67>:    sub    %gs:0x28,%rax
   0xffffffff815849b5 <+76>:    je     0xffffffff815849bc <acpi_ut_track_stack_ptr+83>
   0xffffffff815849b7 <+78>:    call   0xffffffff818c4500 <__stack_chk_fail>
   0xffffffff815849bc <+83>:    add    $0x10,%rsp
   0xffffffff815849c0 <+87>:    ret    
End of assembler dump.
(gdb)