# Note: This file is compiled from the following code, for # the purpose of creating an overflowed dwo section. # After being compiled from source, section `.debug_info.dwo` # is changed to have length (2^32 - 30) Bytes, and added # padding with `.fill` directive, so it is likely to # overflow when packed with other files. # # clang -g -S -gsplit-dwarf -gdwarf-4 hello.c # # #include # void hello() { # printf("hello\n"); # } .text .file "hello.c" .globl hello # -- Begin function hello .p2align 4, 0x90 .type hello,@function hello: # @hello .Lfunc_begin0: .file 1 "/xxxxxx/xxxx/xxxxxxxxxx/xxxxxxxx/hello" "hello.c" .loc 1 3 0 # hello.c:3:0 .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 4 5 prologue_end # hello.c:4:5 movabsq $.L.str, %rdi movb $0, %al callq printf .loc 1 5 1 # hello.c:5:1 popq %rbp .cfi_def_cfa %rsp, 8 retq .Ltmp1: .Lfunc_end0: .size hello, .Lfunc_end0-hello .cfi_endproc # -- End function .type .L.str,@object # @.str .section .rodata.str1.1,"aMS",@progbits,1 .L.str: .asciz "hello\n" .size .L.str, 7 .section .debug_abbrev,"",@progbits .byte 1 # Abbreviation Code .byte 17 # DW_TAG_compile_unit .byte 0 # DW_CHILDREN_no .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 .ascii "\260B" # DW_AT_GNU_dwo_name .byte 14 # DW_FORM_strp .ascii "\261B" # DW_AT_GNU_dwo_id .byte 7 # DW_FORM_data8 .byte 17 # DW_AT_low_pc .byte 1 # DW_FORM_addr .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .ascii "\263B" # DW_AT_GNU_addr_base .byte 23 # DW_FORM_sec_offset .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 0 # EOM(3) .section .debug_info,"",@progbits .Lcu_begin0: # .long 4294967295 # 2^32 - 1 #44 # Length of Unit .long 44 # 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:0x25 DW_TAG_compile_unit .long .Lline_table_start0 # DW_AT_stmt_list .long .Lskel_string0 # DW_AT_comp_dir # DW_AT_GNU_pubnames .long .Lskel_string1 # DW_AT_GNU_dwo_name .quad -94954012350180462 # DW_AT_GNU_dwo_id .quad .Lfunc_begin0 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .long .Laddr_table_base0 # DW_AT_GNU_addr_base # .fill 4294967251 # = 2^32 - 1 - 44 .section .debug_str,"MS",@progbits,1 .Lskel_string0: .asciz "/xxxxxx/xxxx/xxxxxxxxxx/xxxxxxxx/hello" # string offset=0 .Lskel_string1: .asciz "hello.dwo" # string offset=39 .section .debug_str.dwo,"eMS",@progbits,1 .Linfo_string0: .asciz "hello" # string offset=0 .Linfo_string1: .asciz "clang version 11.1.0 (https://github.com/llvm/llvm-project.git 173544ee3d09cdce8665f2097f677c31e1f1a9a1)" # string offset=6 .Linfo_string2: .asciz "hello.c" # string offset=111 .Linfo_string3: .asciz "hello.dwo" # string offset=119 .section .debug_str_offsets.dwo,"e",@progbits .long 0 .long 6 .long 111 .long 119 .section .debug_info.dwo,"e",@progbits .long 4294967266 # 2^32 - 30 #33 # Length of Unit .short 4 # DWARF version number .long 0 # Offset Into Abbrev. Section .byte 8 # Address Size (in bytes) .byte 1 # Abbrev [1] 0xb:0x1a DW_TAG_compile_unit .byte 1 # DW_AT_producer .short 12 # DW_AT_language .byte 2 # DW_AT_name .byte 3 # DW_AT_GNU_dwo_name .quad -94954012350180462 # DW_AT_GNU_dwo_id .byte 2 # Abbrev [2] 0x19:0xb DW_TAG_subprogram .byte 0 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .byte 1 # DW_AT_frame_base .byte 86 .byte 0 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 3 # DW_AT_decl_line # DW_AT_external .byte 0 # End Of Children Mark .fill 4294967233 # 2^32 - 30 - 33 .section .debug_abbrev.dwo,"e",@progbits .byte 1 # Abbreviation Code .byte 17 # DW_TAG_compile_unit .byte 1 # DW_CHILDREN_yes .byte 37 # DW_AT_producer .ascii "\202>" # DW_FORM_GNU_str_index .byte 19 # DW_AT_language .byte 5 # DW_FORM_data2 .byte 3 # DW_AT_name .ascii "\202>" # DW_FORM_GNU_str_index .ascii "\260B" # DW_AT_GNU_dwo_name .ascii "\202>" # DW_FORM_GNU_str_index .ascii "\261B" # DW_AT_GNU_dwo_id .byte 7 # DW_FORM_data8 .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 .ascii "\201>" # DW_FORM_GNU_addr_index .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 .ascii "\202>" # DW_FORM_GNU_str_index .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 0 # EOM(3) .section .debug_addr,"",@progbits .Laddr_table_base0: .quad .Lfunc_begin0 .section .debug_gnu_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 48 # Compilation Unit Length .long 25 # DIE offset .byte 48 # Attributes: FUNCTION, EXTERNAL .asciz "hello" # External Name .long 0 # End Mark .LpubNames_end0: .section .debug_gnu_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 48 # Compilation Unit Length .long 0 # End Mark .LpubTypes_end0: .ident "clang version 11.1.0 (https://github.com/llvm/llvm-project.git 173544ee3d09cdce8665f2097f677c31e1f1a9a1)" .section ".note.GNU-stack","",@progbits .addrsig .addrsig_sym printf .section .debug_line,"",@progbits .Lline_table_start0: