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1# int foo() { return 0; }2# int main() { return foo(); }3# clang++ -ffunction-sections -g2 -gdwarf-4 -gsplit-dwarf -S main.cpp4 5 .text6 .file "main.cpp"7 .section .text._Z3foov,"ax",@progbits8 .globl _Z3foov # -- Begin function _Z3foov9 .p2align 4, 0x9010 .type _Z3foov,@function11_Z3foov: # @_Z3foov12.Lfunc_begin0:13 .file 1 "." "main.cpp"14 .loc 1 1 0 # main.cpp:1:015 .cfi_startproc16# %bb.0: # %entry17 pushq %rbp18 .cfi_def_cfa_offset 1619 .cfi_offset %rbp, -1620 movq %rsp, %rbp21 .cfi_def_cfa_register %rbp22.Ltmp0:23 .loc 1 1 13 prologue_end # main.cpp:1:1324 xorl %eax, %eax25 .loc 1 1 13 epilogue_begin is_stmt 0 # main.cpp:1:1326 popq %rbp27 .cfi_def_cfa %rsp, 828 retq29.Ltmp1:30.Lfunc_end0:31 .size _Z3foov, .Lfunc_end0-_Z3foov32 .cfi_endproc33 # -- End function34 .section .text.main,"ax",@progbits35 .globl main # -- Begin function main36 .p2align 4, 0x9037 .type main,@function38main: # @main39.Lfunc_begin1:40 .loc 1 2 0 is_stmt 1 # main.cpp:2:041 .cfi_startproc42# %bb.0: # %entry43 pushq %rbp44 .cfi_def_cfa_offset 1645 .cfi_offset %rbp, -1646 movq %rsp, %rbp47 .cfi_def_cfa_register %rbp48 subq $16, %rsp49 movl $0, -4(%rbp)50.Ltmp2:51 .loc 1 2 21 prologue_end # main.cpp:2:2152 callq _Z3foov53 .loc 1 2 14 epilogue_begin is_stmt 0 # main.cpp:2:1454 addq $16, %rsp55 popq %rbp56 .cfi_def_cfa %rsp, 857 retq58.Ltmp3:59.Lfunc_end1:60 .size main, .Lfunc_end1-main61 .cfi_endproc62 # -- End function63 .section .debug_abbrev,"",@progbits64 .byte 1 # Abbreviation Code65 .byte 17 # DW_TAG_compile_unit66 .byte 0 # DW_CHILDREN_no67 .byte 16 # DW_AT_stmt_list68 .byte 23 # DW_FORM_sec_offset69 .byte 27 # DW_AT_comp_dir70 .byte 14 # DW_FORM_strp71 .ascii "\264B" # DW_AT_GNU_pubnames72 .byte 25 # DW_FORM_flag_present73 .ascii "\260B" # DW_AT_GNU_dwo_name74 .byte 14 # DW_FORM_strp75 .ascii "\261B" # DW_AT_GNU_dwo_id76 .byte 7 # DW_FORM_data877 .byte 17 # DW_AT_low_pc78 .byte 1 # DW_FORM_addr79 .byte 85 # DW_AT_ranges80 .byte 23 # DW_FORM_sec_offset81 .ascii "\263B" # DW_AT_GNU_addr_base82 .byte 23 # DW_FORM_sec_offset83 .byte 0 # EOM(1)84 .byte 0 # EOM(2)85 .byte 0 # EOM(3)86 .section .debug_info,"",@progbits87.Lcu_begin0:88 .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit89.Ldebug_info_start0:90 .short 4 # DWARF version number91 .long .debug_abbrev # Offset Into Abbrev. Section92 .byte 8 # Address Size (in bytes)93 .byte 1 # Abbrev [1] 0xb:0x25 DW_TAG_compile_unit94 .long .Lline_table_start0 # DW_AT_stmt_list95 .long .Lskel_string0 # DW_AT_comp_dir96 # DW_AT_GNU_pubnames97 .long .Lskel_string1 # DW_AT_GNU_dwo_name98 .quad -252790171939032967 # DW_AT_GNU_dwo_id99 .quad 0 # DW_AT_low_pc100 .long .Ldebug_ranges0 # DW_AT_ranges101 .long .Laddr_table_base0 # DW_AT_GNU_addr_base102.Ldebug_info_end0:103 .section .debug_ranges,"",@progbits104.Ldebug_ranges0:105 .quad .Lfunc_begin0106 .quad .Lfunc_end0107 .quad .Lfunc_begin1108 .quad .Lfunc_end1109 .quad 0110 .quad 0111 .section .debug_str,"MS",@progbits,1112.Lskel_string0:113 .asciz "." # string offset=0114.Lskel_string1:115 .asciz "main.dwo" # string offset=58116 .section .debug_str.dwo,"eMS",@progbits,1117.Linfo_string0:118 .asciz "_Z3foov" # string offset=0119.Linfo_string1:120 .asciz "foo" # string offset=8121.Linfo_string2:122 .asciz "int" # string offset=12123.Linfo_string3:124 .asciz "main" # string offset=16125.Linfo_string4:126 .asciz "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" # string offset=21127.Linfo_string5:128 .asciz "main.cpp" # string offset=126129.Linfo_string6:130 .asciz "main.dwo" # string offset=135131 .section .debug_str_offsets.dwo,"e",@progbits132 .long 0133 .long 8134 .long 12135 .long 16136 .long 21137 .long 126138 .long 135139 .section .debug_info.dwo,"e",@progbits140 .long .Ldebug_info_dwo_end0-.Ldebug_info_dwo_start0 # Length of Unit141.Ldebug_info_dwo_start0:142 .short 4 # DWARF version number143 .long 0 # Offset Into Abbrev. Section144 .byte 8 # Address Size (in bytes)145 .byte 1 # Abbrev [1] 0xb:0x32 DW_TAG_compile_unit146 .byte 4 # DW_AT_producer147 .short 33 # DW_AT_language148 .byte 5 # DW_AT_name149 .byte 6 # DW_AT_GNU_dwo_name150 .quad -252790171939032967 # DW_AT_GNU_dwo_id151 .byte 2 # Abbrev [2] 0x19:0x10 DW_TAG_subprogram152 .byte 0 # DW_AT_low_pc153 .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc154 .byte 1 # DW_AT_frame_base155 .byte 86156 .byte 0 # DW_AT_linkage_name157 .byte 1 # DW_AT_name158 .byte 1 # DW_AT_decl_file159 .byte 1 # DW_AT_decl_line160 .long 56 # DW_AT_type161 # DW_AT_external162 .byte 3 # Abbrev [3] 0x29:0xf DW_TAG_subprogram163 .byte 1 # DW_AT_low_pc164 .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc165 .byte 1 # DW_AT_frame_base166 .byte 86167 .byte 3 # DW_AT_name168 .byte 1 # DW_AT_decl_file169 .byte 2 # DW_AT_decl_line170 .long 56 # DW_AT_type171 # DW_AT_external172 .byte 4 # Abbrev [4] 0x38:0x4 DW_TAG_base_type173 .byte 2 # DW_AT_name174 .byte 5 # DW_AT_encoding175 .byte 4 # DW_AT_byte_size176 .byte 0 # End Of Children Mark177.Ldebug_info_dwo_end0:178 .section .debug_abbrev.dwo,"e",@progbits179 .byte 1 # Abbreviation Code180 .byte 17 # DW_TAG_compile_unit181 .byte 1 # DW_CHILDREN_yes182 .byte 37 # DW_AT_producer183 .ascii "\202>" # DW_FORM_GNU_str_index184 .byte 19 # DW_AT_language185 .byte 5 # DW_FORM_data2186 .byte 3 # DW_AT_name187 .ascii "\202>" # DW_FORM_GNU_str_index188 .ascii "\260B" # DW_AT_GNU_dwo_name189 .ascii "\202>" # DW_FORM_GNU_str_index190 .ascii "\261B" # DW_AT_GNU_dwo_id191 .byte 7 # DW_FORM_data8192 .byte 0 # EOM(1)193 .byte 0 # EOM(2)194 .byte 2 # Abbreviation Code195 .byte 46 # DW_TAG_subprogram196 .byte 0 # DW_CHILDREN_no197 .byte 17 # DW_AT_low_pc198 .ascii "\201>" # DW_FORM_GNU_addr_index199 .byte 18 # DW_AT_high_pc200 .byte 6 # DW_FORM_data4201 .byte 64 # DW_AT_frame_base202 .byte 24 # DW_FORM_exprloc203 .byte 110 # DW_AT_linkage_name204 .ascii "\202>" # DW_FORM_GNU_str_index205 .byte 3 # DW_AT_name206 .ascii "\202>" # DW_FORM_GNU_str_index207 .byte 58 # DW_AT_decl_file208 .byte 11 # DW_FORM_data1209 .byte 59 # DW_AT_decl_line210 .byte 11 # DW_FORM_data1211 .byte 73 # DW_AT_type212 .byte 19 # DW_FORM_ref4213 .byte 63 # DW_AT_external214 .byte 25 # DW_FORM_flag_present215 .byte 0 # EOM(1)216 .byte 0 # EOM(2)217 .byte 3 # Abbreviation Code218 .byte 46 # DW_TAG_subprogram219 .byte 0 # DW_CHILDREN_no220 .byte 17 # DW_AT_low_pc221 .ascii "\201>" # DW_FORM_GNU_addr_index222 .byte 18 # DW_AT_high_pc223 .byte 6 # DW_FORM_data4224 .byte 64 # DW_AT_frame_base225 .byte 24 # DW_FORM_exprloc226 .byte 3 # DW_AT_name227 .ascii "\202>" # DW_FORM_GNU_str_index228 .byte 58 # DW_AT_decl_file229 .byte 11 # DW_FORM_data1230 .byte 59 # DW_AT_decl_line231 .byte 11 # DW_FORM_data1232 .byte 73 # DW_AT_type233 .byte 19 # DW_FORM_ref4234 .byte 63 # DW_AT_external235 .byte 25 # DW_FORM_flag_present236 .byte 0 # EOM(1)237 .byte 0 # EOM(2)238 .byte 4 # Abbreviation Code239 .byte 36 # DW_TAG_base_type240 .byte 0 # DW_CHILDREN_no241 .byte 3 # DW_AT_name242 .ascii "\202>" # DW_FORM_GNU_str_index243 .byte 62 # DW_AT_encoding244 .byte 11 # DW_FORM_data1245 .byte 11 # DW_AT_byte_size246 .byte 11 # DW_FORM_data1247 .byte 0 # EOM(1)248 .byte 0 # EOM(2)249 .byte 0 # EOM(3)250 .section .debug_addr,"",@progbits251.Laddr_table_base0:252 .quad .Lfunc_begin0253 .quad .Lfunc_begin1254 .section .debug_gnu_pubnames,"",@progbits255 .long .LpubNames_end0-.LpubNames_start0 # Length of Public Names Info256.LpubNames_start0:257 .short 2 # DWARF Version258 .long .Lcu_begin0 # Offset of Compilation Unit Info259 .long 48 # Compilation Unit Length260 .long 41 # DIE offset261 .byte 48 # Attributes: FUNCTION, EXTERNAL262 .asciz "main" # External Name263 .long 25 # DIE offset264 .byte 48 # Attributes: FUNCTION, EXTERNAL265 .asciz "foo" # External Name266 .long 0 # End Mark267.LpubNames_end0:268 .section .debug_gnu_pubtypes,"",@progbits269 .long .LpubTypes_end0-.LpubTypes_start0 # Length of Public Types Info270.LpubTypes_start0:271 .short 2 # DWARF Version272 .long .Lcu_begin0 # Offset of Compilation Unit Info273 .long 48 # Compilation Unit Length274 .long 56 # DIE offset275 .byte 144 # Attributes: TYPE, STATIC276 .asciz "int" # External Name277 .long 0 # End Mark278.LpubTypes_end0:279 .ident "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)"280 .section ".note.GNU-stack","",@progbits281 .addrsig282 .addrsig_sym _Z3foov283 .section .debug_line,"",@progbits284.Lline_table_start0:285