$ 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:
   0xffffffff8156518b <+0>:     call   0xffffffff81062c40 <__fentry__>
   0xffffffff81565190 <+5>:     lea    -0x1(%rdi),%rdx
   0xffffffff81565194 <+9>:     mov    %rdi,%rax
   0xffffffff81565197 <+12>:    cmp    $0xfffffffffffffffd,%rdx
   0xffffffff8156519b <+16>:    jbe    0xffffffff815651a5 <acpi_ns_validate_handle+26>
   0xffffffff8156519d <+18>:    mov    0x16a288c(%rip),%rax        # 0xffffffff82c07a30 <acpi_gbl_root_node>
   0xffffffff815651a4 <+25>:    ret    
   0xffffffff815651a5 <+26>:    cmpb   $0xf,0x8(%rdi)
   0xffffffff815651a9 <+30>:    je     0xffffffff815651ad <acpi_ns_validate_handle+34>
   0xffffffff815651ab <+32>:    xor    %eax,%eax
   0xffffffff815651ad <+34>:    ret    
End of assembler dump.
(gdb) disassemble acpi_get_data_full
Dump of assembler code for function acpi_get_data_full:
   0xffffffff81565cee <+0>:     call   0xffffffff81062c40 <__fentry__>
   0xffffffff81565cf3 <+5>:     push   %r14
   0xffffffff81565cf5 <+7>:     test   %rsi,%rsi
   0xffffffff81565cf8 <+10>:    push   %r13
   0xffffffff81565cfa <+12>:    push   %r12
   0xffffffff81565cfc <+14>:    push   %rbp
   0xffffffff81565cfd <+15>:    push   %rbx
   0xffffffff81565cfe <+16>:    mov    %rdx,%rbx
   0xffffffff81565d01 <+19>:    sete   %dl
   0xffffffff81565d04 <+22>:    test   %rbx,%rbx
   0xffffffff81565d07 <+25>:    sete   %al
   0xffffffff81565d0a <+28>:    or     %al,%dl
   0xffffffff81565d0c <+30>:    jne    0xffffffff81565d6e <acpi_get_data_full+128>
   0xffffffff81565d0e <+32>:    mov    %rdi,%r14
   0xffffffff81565d11 <+35>:    test   %rdi,%rdi
   0xffffffff81565d14 <+38>:    je     0xffffffff81565d6e <acpi_get_data_full+128>
   0xffffffff81565d16 <+40>:    mov    $0x1,%edi
   0xffffffff81565d1b <+45>:    mov    %rsi,%r13
   0xffffffff81565d1e <+48>:    mov    %rcx,%rbp
   0xffffffff81565d21 <+51>:    call   0xffffffff8156ef3e <acpi_ut_acquire_mutex>
   0xffffffff81565d26 <+56>:    mov    %eax,%r12d
   0xffffffff81565d29 <+59>:    test   %eax,%eax
   0xffffffff81565d2b <+61>:    jne    0xffffffff81565d74 <acpi_get_data_full+134>
   0xffffffff81565d2d <+63>:    mov    %r14,%rdi
   0xffffffff81565d30 <+66>:    mov    $0x1001,%r12d
   0xffffffff81565d36 <+72>:    call   0xffffffff8156518b <acpi_ns_validate_handle>
   0xffffffff81565d3b <+77>:    mov    %rax,%rdi
   0xffffffff81565d3e <+80>:    test   %rax,%rax
   0xffffffff81565d41 <+83>:    je     0xffffffff81565d62 <acpi_get_data_full+116>
   0xffffffff81565d43 <+85>:    mov    %rbx,%rdx
   0xffffffff81565d46 <+88>:    mov    %r13,%rsi
   0xffffffff81565d49 <+91>:    call   0xffffffff81563566 <acpi_ns_get_attached_data>
   0xffffffff81565d4e <+96>:    mov    %eax,%r12d
   0xffffffff81565d51 <+99>:    test   %eax,%eax
   0xffffffff81565d53 <+101>:   jne    0xffffffff81565d62 <acpi_get_data_full+116>
   0xffffffff81565d55 <+103>:   test   %rbp,%rbp
   0xffffffff81565d58 <+106>:   je     0xffffffff81565d62 <acpi_get_data_full+116>
   0xffffffff81565d5a <+108>:   mov    (%rbx),%rdi
   0xffffffff81565d5d <+111>:   call   0xffffffff81c01de0 <__x86_indirect_thunk_rbp>
   0xffffffff81565d62 <+116>:   mov    $0x1,%edi
   0xffffffff81565d67 <+121>:   call   0xffffffff8156efc7 <acpi_ut_release_mutex>
   0xffffffff81565d6c <+126>:   jmp    0xffffffff81565d74 <acpi_get_data_full+134>
   0xffffffff81565d6e <+128>:   mov    $0x1001,%r12d
   0xffffffff81565d74 <+134>:   pop    %rbx
   0xffffffff81565d75 <+135>:   mov    %r12d,%eax
   0xffffffff81565d78 <+138>:   pop    %rbp
   0xffffffff81565d79 <+139>:   pop    %r12
   0xffffffff81565d7b <+141>:   pop    %r13
   0xffffffff81565d7d <+143>:   pop    %r14
   0xffffffff81565d7f <+145>:   ret    
End of assembler dump.
(gdb)