| # Source (tiny.cc): |
| # void a() {} |
| # void b() {} |
| # int main(int argc, char** argv) { |
| # void(*ptr)(); |
| # if (argc == 1) |
| # ptr = &a; |
| # else |
| # ptr = &b; |
| # ptr(); |
| # } |
| # Compile with: |
| # clang++ -g tiny.cc -S -o tiny.s |
| |
| .text |
| .file "tiny.cc" |
| .globl _Z1av # -- Begin function _Z1av |
| .p2align 4, 0x90 |
| .type _Z1av,@function |
| _Z1av: # @_Z1av |
| .Lfunc_begin0: |
| .file 1 "tiny.cc" |
| .loc 1 1 0 # tiny.cc:1:0 |
| .cfi_startproc |
| # %bb.0: |
| pushq %rbp |
| .cfi_def_cfa_offset 16 |
| .cfi_offset %rbp, -16 |
| movq %rsp, %rbp |
| .cfi_def_cfa_register %rbp |
| .Ltmp0: |
| .loc 1 1 11 prologue_end # tiny.cc:1:11 |
| popq %rbp |
| .cfi_def_cfa %rsp, 8 |
| retq |
| .Ltmp1: |
| .Lfunc_end0: |
| .size _Z1av, .Lfunc_end0-_Z1av |
| .cfi_endproc |
| # -- End function |
| .globl _Z1bv # -- Begin function _Z1bv |
| .p2align 4, 0x90 |
| .type _Z1bv,@function |
| _Z1bv: # @_Z1bv |
| .Lfunc_begin1: |
| .loc 1 2 0 # tiny.cc:2:0 |
| .cfi_startproc |
| # %bb.0: |
| pushq %rbp |
| .cfi_def_cfa_offset 16 |
| .cfi_offset %rbp, -16 |
| movq %rsp, %rbp |
| .cfi_def_cfa_register %rbp |
| .Ltmp2: |
| .loc 1 2 11 prologue_end # tiny.cc:2:11 |
| popq %rbp |
| .cfi_def_cfa %rsp, 8 |
| retq |
| .Ltmp3: |
| .Lfunc_end1: |
| .size _Z1bv, .Lfunc_end1-_Z1bv |
| .cfi_endproc |
| # -- End function |
| .globl main # -- Begin function main |
| .p2align 4, 0x90 |
| .type main,@function |
| main: # @main |
| .Lfunc_begin2: |
| .loc 1 4 0 # tiny.cc:4:0 |
| .cfi_startproc |
| # %bb.0: |
| pushq %rbp |
| .cfi_def_cfa_offset 16 |
| .cfi_offset %rbp, -16 |
| movq %rsp, %rbp |
| .cfi_def_cfa_register %rbp |
| subq $32, %rsp |
| movl $0, -4(%rbp) |
| movl %edi, -8(%rbp) |
| movq %rsi, -16(%rbp) |
| .Ltmp4: |
| .loc 1 6 12 prologue_end # tiny.cc:6:12 |
| cmpl $1, -8(%rbp) |
| .Ltmp5: |
| .loc 1 6 7 is_stmt 0 # tiny.cc:6:7 |
| jne .LBB2_2 |
| # %bb.1: |
| .loc 1 0 7 # tiny.cc:0:7 |
| movabsq $_Z1av, %rax |
| .Ltmp6: |
| .loc 1 7 9 is_stmt 1 # tiny.cc:7:9 |
| movq %rax, -24(%rbp) |
| .loc 1 7 5 is_stmt 0 # tiny.cc:7:5 |
| jmp .LBB2_3 |
| .LBB2_2: |
| .loc 1 0 5 # tiny.cc:0:5 |
| movabsq $_Z1bv, %rax |
| .loc 1 9 9 is_stmt 1 # tiny.cc:9:9 |
| movq %rax, -24(%rbp) |
| .Ltmp7: |
| .LBB2_3: |
| .loc 1 11 3 # tiny.cc:11:3 |
| callq *-24(%rbp) |
| .loc 1 12 1 # tiny.cc:12:1 |
| movl -4(%rbp), %eax |
| addq $32, %rsp |
| popq %rbp |
| .cfi_def_cfa %rsp, 8 |
| retq |
| .Ltmp8: |
| .Lfunc_end2: |
| .size main, .Lfunc_end2-main |
| .cfi_endproc |
| # -- End function |
| .section .debug_str,"MS",@progbits,1 |
| .Linfo_string0: |
| .asciz "clang version 6.0.0 (trunk 317104)" # string offset=0 |
| .Linfo_string1: |
| .asciz "tiny.cc" # string offset=35 |
| .Linfo_string2: |
| .asciz "/tmp/a/b" # string offset=43 |
| .Linfo_string3: |
| .asciz "_Z1av" # string offset=52 |
| .Linfo_string4: |
| .asciz "a" # string offset=58 |
| .Linfo_string5: |
| .asciz "_Z1bv" # string offset=60 |
| .Linfo_string6: |
| .asciz "b" # string offset=66 |
| .Linfo_string7: |
| .asciz "main" # string offset=68 |
| .Linfo_string8: |
| .asciz "int" # string offset=73 |
| .Linfo_string9: |
| .asciz "argc" # string offset=77 |
| .Linfo_string10: |
| .asciz "argv" # string offset=82 |
| .Linfo_string11: |
| .asciz "char" # string offset=87 |
| .Linfo_string12: |
| .asciz "ptr" # string offset=92 |
| .section .debug_abbrev,"",@progbits |
| .byte 1 # Abbreviation Code |
| .byte 17 # DW_TAG_compile_unit |
| .byte 1 # DW_CHILDREN_yes |
| .byte 37 # DW_AT_producer |
| .byte 14 # DW_FORM_strp |
| .byte 19 # DW_AT_language |
| .byte 5 # DW_FORM_data2 |
| .byte 3 # DW_AT_name |
| .byte 14 # DW_FORM_strp |
| .byte 16 # DW_AT_stmt_list |
| .byte 23 # DW_FORM_sec_offset |
| .byte 27 # DW_AT_comp_dir |
| .byte 14 # DW_FORM_strp |
| .ascii "\264B" # DW_AT_GNU_pubnames |
| .byte 25 # DW_FORM_flag_present |
| .byte 17 # DW_AT_low_pc |
| .byte 1 # DW_FORM_addr |
| .byte 18 # DW_AT_high_pc |
| .byte 6 # DW_FORM_data4 |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 2 # Abbreviation Code |
| .byte 46 # DW_TAG_subprogram |
| .byte 0 # DW_CHILDREN_no |
| .byte 17 # DW_AT_low_pc |
| .byte 1 # DW_FORM_addr |
| .byte 18 # DW_AT_high_pc |
| .byte 6 # DW_FORM_data4 |
| .byte 64 # DW_AT_frame_base |
| .byte 24 # DW_FORM_exprloc |
| .byte 110 # DW_AT_linkage_name |
| .byte 14 # DW_FORM_strp |
| .byte 3 # DW_AT_name |
| .byte 14 # DW_FORM_strp |
| .byte 58 # DW_AT_decl_file |
| .byte 11 # DW_FORM_data1 |
| .byte 59 # DW_AT_decl_line |
| .byte 11 # DW_FORM_data1 |
| .byte 63 # DW_AT_external |
| .byte 25 # DW_FORM_flag_present |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 3 # Abbreviation Code |
| .byte 46 # DW_TAG_subprogram |
| .byte 1 # DW_CHILDREN_yes |
| .byte 17 # DW_AT_low_pc |
| .byte 1 # DW_FORM_addr |
| .byte 18 # DW_AT_high_pc |
| .byte 6 # DW_FORM_data4 |
| .byte 64 # DW_AT_frame_base |
| .byte 24 # DW_FORM_exprloc |
| .byte 3 # DW_AT_name |
| .byte 14 # DW_FORM_strp |
| .byte 58 # DW_AT_decl_file |
| .byte 11 # DW_FORM_data1 |
| .byte 59 # DW_AT_decl_line |
| .byte 11 # DW_FORM_data1 |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 63 # DW_AT_external |
| .byte 25 # DW_FORM_flag_present |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 4 # Abbreviation Code |
| .byte 5 # DW_TAG_formal_parameter |
| .byte 0 # DW_CHILDREN_no |
| .byte 2 # DW_AT_location |
| .byte 24 # DW_FORM_exprloc |
| .byte 3 # DW_AT_name |
| .byte 14 # DW_FORM_strp |
| .byte 58 # DW_AT_decl_file |
| .byte 11 # DW_FORM_data1 |
| .byte 59 # DW_AT_decl_line |
| .byte 11 # DW_FORM_data1 |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 5 # Abbreviation Code |
| .byte 52 # DW_TAG_variable |
| .byte 0 # DW_CHILDREN_no |
| .byte 2 # DW_AT_location |
| .byte 24 # DW_FORM_exprloc |
| .byte 3 # DW_AT_name |
| .byte 14 # DW_FORM_strp |
| .byte 58 # DW_AT_decl_file |
| .byte 11 # DW_FORM_data1 |
| .byte 59 # DW_AT_decl_line |
| .byte 11 # DW_FORM_data1 |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 6 # Abbreviation Code |
| .byte 36 # DW_TAG_base_type |
| .byte 0 # DW_CHILDREN_no |
| .byte 3 # DW_AT_name |
| .byte 14 # DW_FORM_strp |
| .byte 62 # DW_AT_encoding |
| .byte 11 # DW_FORM_data1 |
| .byte 11 # DW_AT_byte_size |
| .byte 11 # DW_FORM_data1 |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 7 # Abbreviation Code |
| .byte 15 # DW_TAG_pointer_type |
| .byte 0 # DW_CHILDREN_no |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 8 # Abbreviation Code |
| .byte 21 # DW_TAG_subroutine_type |
| .byte 0 # DW_CHILDREN_no |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 0 # EOM(3) |
| .section .debug_info,"",@progbits |
| .Lcu_begin0: |
| .long 187 # Length of Unit |
| .short 4 # DWARF version number |
| .long .debug_abbrev # Offset Into Abbrev. Section |
| .byte 8 # Address Size (in bytes) |
| .byte 1 # Abbrev [1] 0xb:0xb4 DW_TAG_compile_unit |
| .long .Linfo_string0 # DW_AT_producer |
| .short 4 # DW_AT_language |
| .long .Linfo_string1 # DW_AT_name |
| .long .Lline_table_start0 # DW_AT_stmt_list |
| .long .Linfo_string2 # DW_AT_comp_dir |
| # DW_AT_GNU_pubnames |
| .quad .Lfunc_begin0 # DW_AT_low_pc |
| .long .Lfunc_end2-.Lfunc_begin0 # DW_AT_high_pc |
| .byte 2 # Abbrev [2] 0x2a:0x19 DW_TAG_subprogram |
| .quad .Lfunc_begin0 # DW_AT_low_pc |
| .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc |
| .byte 1 # DW_AT_frame_base |
| .byte 86 |
| .long .Linfo_string3 # DW_AT_linkage_name |
| .long .Linfo_string4 # DW_AT_name |
| .byte 1 # DW_AT_decl_file |
| .byte 1 # DW_AT_decl_line |
| # DW_AT_external |
| .byte 2 # Abbrev [2] 0x43:0x19 DW_TAG_subprogram |
| .quad .Lfunc_begin1 # DW_AT_low_pc |
| .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc |
| .byte 1 # DW_AT_frame_base |
| .byte 86 |
| .long .Linfo_string5 # DW_AT_linkage_name |
| .long .Linfo_string6 # DW_AT_name |
| .byte 1 # DW_AT_decl_file |
| .byte 2 # DW_AT_decl_line |
| # DW_AT_external |
| .byte 3 # Abbrev [3] 0x5c:0x44 DW_TAG_subprogram |
| .quad .Lfunc_begin2 # DW_AT_low_pc |
| .long .Lfunc_end2-.Lfunc_begin2 # DW_AT_high_pc |
| .byte 1 # DW_AT_frame_base |
| .byte 86 |
| .long .Linfo_string7 # DW_AT_name |
| .byte 1 # DW_AT_decl_file |
| .byte 4 # DW_AT_decl_line |
| .long 160 # DW_AT_type |
| # DW_AT_external |
| .byte 4 # Abbrev [4] 0x75:0xe DW_TAG_formal_parameter |
| .byte 2 # DW_AT_location |
| .byte 145 |
| .byte 120 |
| .long .Linfo_string9 # DW_AT_name |
| .byte 1 # DW_AT_decl_file |
| .byte 4 # DW_AT_decl_line |
| .long 160 # DW_AT_type |
| .byte 4 # Abbrev [4] 0x83:0xe DW_TAG_formal_parameter |
| .byte 2 # DW_AT_location |
| .byte 145 |
| .byte 112 |
| .long .Linfo_string10 # DW_AT_name |
| .byte 1 # DW_AT_decl_file |
| .byte 4 # DW_AT_decl_line |
| .long 167 # DW_AT_type |
| .byte 5 # Abbrev [5] 0x91:0xe DW_TAG_variable |
| .byte 2 # DW_AT_location |
| .byte 145 |
| .byte 104 |
| .long .Linfo_string12 # DW_AT_name |
| .byte 1 # DW_AT_decl_file |
| .byte 5 # DW_AT_decl_line |
| .long 184 # DW_AT_type |
| .byte 0 # End Of Children Mark |
| .byte 6 # Abbrev [6] 0xa0:0x7 DW_TAG_base_type |
| .long .Linfo_string8 # DW_AT_name |
| .byte 5 # DW_AT_encoding |
| .byte 4 # DW_AT_byte_size |
| .byte 7 # Abbrev [7] 0xa7:0x5 DW_TAG_pointer_type |
| .long 172 # DW_AT_type |
| .byte 7 # Abbrev [7] 0xac:0x5 DW_TAG_pointer_type |
| .long 177 # DW_AT_type |
| .byte 6 # Abbrev [6] 0xb1:0x7 DW_TAG_base_type |
| .long .Linfo_string11 # DW_AT_name |
| .byte 6 # DW_AT_encoding |
| .byte 1 # DW_AT_byte_size |
| .byte 7 # Abbrev [7] 0xb8:0x5 DW_TAG_pointer_type |
| .long 189 # DW_AT_type |
| .byte 8 # Abbrev [8] 0xbd:0x1 DW_TAG_subroutine_type |
| .byte 0 # End Of Children Mark |
| .section .debug_ranges,"",@progbits |
| .section .debug_macinfo,"",@progbits |
| .Lcu_macro_begin0: |
| .byte 0 # End Of Macro List Mark |
| .section .debug_pubnames,"",@progbits |
| .long .LpubNames_end0-.LpubNames_begin0 # Length of Public Names Info |
| .LpubNames_begin0: |
| .short 2 # DWARF Version |
| .long .Lcu_begin0 # Offset of Compilation Unit Info |
| .long 191 # Compilation Unit Length |
| .long 42 # DIE offset |
| .asciz "a" # External Name |
| .long 67 # DIE offset |
| .asciz "b" # External Name |
| .long 92 # DIE offset |
| .asciz "main" # External Name |
| .long 0 # End Mark |
| .LpubNames_end0: |
| .section .debug_pubtypes,"",@progbits |
| .long .LpubTypes_end0-.LpubTypes_begin0 # Length of Public Types Info |
| .LpubTypes_begin0: |
| .short 2 # DWARF Version |
| .long .Lcu_begin0 # Offset of Compilation Unit Info |
| .long 191 # Compilation Unit Length |
| .long 160 # DIE offset |
| .asciz "int" # External Name |
| .long 177 # DIE offset |
| .asciz "char" # External Name |
| .long 0 # End Mark |
| .LpubTypes_end0: |
| |
| .ident "clang version 6.0.0 (trunk 317104)" |
| .section ".note.GNU-stack","",@progbits |
| .section .debug_line,"",@progbits |
| .Lline_table_start0: |
