1*53a483ceSzhuna# Note: This file is compiled from the following code, for 2*53a483ceSzhuna# the purpose of creating an overflowed dwo section. 3*53a483ceSzhuna# After being compiled from source, section `.debug_info.dwo` 4*53a483ceSzhuna# is changed to have length (2^32 - 30) Bytes, and added 5*53a483ceSzhuna# padding with `.fill` directive, so it is likely to 6*53a483ceSzhuna# overflow when packed with other files. 7*53a483ceSzhuna# 8*53a483ceSzhuna# clang -g -S -gsplit-dwarf -gdwarf-4 hello.c 9*53a483ceSzhuna# 10*53a483ceSzhuna# #include <stdio.h> 11*53a483ceSzhuna# void hello() { 12*53a483ceSzhuna# printf("hello\n"); 13*53a483ceSzhuna# } 14*53a483ceSzhuna 15*53a483ceSzhuna .text 16*53a483ceSzhuna .file "hello.c" 17*53a483ceSzhuna .globl hello # -- Begin function hello 18*53a483ceSzhuna .p2align 4, 0x90 19*53a483ceSzhuna .type hello,@function 20*53a483ceSzhunahello: # @hello 21*53a483ceSzhuna.Lfunc_begin0: 22*53a483ceSzhuna .file 1 "/xxxxxx/xxxx/xxxxxxxxxx/xxxxxxxx/hello" "hello.c" 23*53a483ceSzhuna .loc 1 3 0 # hello.c:3:0 24*53a483ceSzhuna .cfi_startproc 25*53a483ceSzhuna# %bb.0: 26*53a483ceSzhuna pushq %rbp 27*53a483ceSzhuna .cfi_def_cfa_offset 16 28*53a483ceSzhuna .cfi_offset %rbp, -16 29*53a483ceSzhuna movq %rsp, %rbp 30*53a483ceSzhuna .cfi_def_cfa_register %rbp 31*53a483ceSzhuna.Ltmp0: 32*53a483ceSzhuna .loc 1 4 5 prologue_end # hello.c:4:5 33*53a483ceSzhuna movabsq $.L.str, %rdi 34*53a483ceSzhuna movb $0, %al 35*53a483ceSzhuna callq printf 36*53a483ceSzhuna .loc 1 5 1 # hello.c:5:1 37*53a483ceSzhuna popq %rbp 38*53a483ceSzhuna .cfi_def_cfa %rsp, 8 39*53a483ceSzhuna retq 40*53a483ceSzhuna.Ltmp1: 41*53a483ceSzhuna.Lfunc_end0: 42*53a483ceSzhuna .size hello, .Lfunc_end0-hello 43*53a483ceSzhuna .cfi_endproc 44*53a483ceSzhuna # -- End function 45*53a483ceSzhuna .type .L.str,@object # @.str 46*53a483ceSzhuna .section .rodata.str1.1,"aMS",@progbits,1 47*53a483ceSzhuna.L.str: 48*53a483ceSzhuna .asciz "hello\n" 49*53a483ceSzhuna .size .L.str, 7 50*53a483ceSzhuna 51*53a483ceSzhuna .section .debug_abbrev,"",@progbits 52*53a483ceSzhuna .byte 1 # Abbreviation Code 53*53a483ceSzhuna .byte 17 # DW_TAG_compile_unit 54*53a483ceSzhuna .byte 0 # DW_CHILDREN_no 55*53a483ceSzhuna .byte 16 # DW_AT_stmt_list 56*53a483ceSzhuna .byte 23 # DW_FORM_sec_offset 57*53a483ceSzhuna .byte 27 # DW_AT_comp_dir 58*53a483ceSzhuna .byte 14 # DW_FORM_strp 59*53a483ceSzhuna .ascii "\264B" # DW_AT_GNU_pubnames 60*53a483ceSzhuna .byte 25 # DW_FORM_flag_present 61*53a483ceSzhuna .ascii "\260B" # DW_AT_GNU_dwo_name 62*53a483ceSzhuna .byte 14 # DW_FORM_strp 63*53a483ceSzhuna .ascii "\261B" # DW_AT_GNU_dwo_id 64*53a483ceSzhuna .byte 7 # DW_FORM_data8 65*53a483ceSzhuna .byte 17 # DW_AT_low_pc 66*53a483ceSzhuna .byte 1 # DW_FORM_addr 67*53a483ceSzhuna .byte 18 # DW_AT_high_pc 68*53a483ceSzhuna .byte 6 # DW_FORM_data4 69*53a483ceSzhuna .ascii "\263B" # DW_AT_GNU_addr_base 70*53a483ceSzhuna .byte 23 # DW_FORM_sec_offset 71*53a483ceSzhuna .byte 0 # EOM(1) 72*53a483ceSzhuna .byte 0 # EOM(2) 73*53a483ceSzhuna .byte 0 # EOM(3) 74*53a483ceSzhuna .section .debug_info,"",@progbits 75*53a483ceSzhuna.Lcu_begin0: 76*53a483ceSzhuna # .long 4294967295 # 2^32 - 1 #44 # Length of Unit 77*53a483ceSzhuna .long 44 # Length of Unit 78*53a483ceSzhuna .short 4 # DWARF version number 79*53a483ceSzhuna .long .debug_abbrev # Offset Into Abbrev. Section 80*53a483ceSzhuna .byte 8 # Address Size (in bytes) 81*53a483ceSzhuna .byte 1 # Abbrev [1] 0xb:0x25 DW_TAG_compile_unit 82*53a483ceSzhuna .long .Lline_table_start0 # DW_AT_stmt_list 83*53a483ceSzhuna .long .Lskel_string0 # DW_AT_comp_dir 84*53a483ceSzhuna # DW_AT_GNU_pubnames 85*53a483ceSzhuna .long .Lskel_string1 # DW_AT_GNU_dwo_name 86*53a483ceSzhuna .quad -94954012350180462 # DW_AT_GNU_dwo_id 87*53a483ceSzhuna .quad .Lfunc_begin0 # DW_AT_low_pc 88*53a483ceSzhuna .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc 89*53a483ceSzhuna .long .Laddr_table_base0 # DW_AT_GNU_addr_base 90*53a483ceSzhuna # .fill 4294967251 # = 2^32 - 1 - 44 91*53a483ceSzhuna .section .debug_str,"MS",@progbits,1 92*53a483ceSzhuna.Lskel_string0: 93*53a483ceSzhuna .asciz "/xxxxxx/xxxx/xxxxxxxxxx/xxxxxxxx/hello" # string offset=0 94*53a483ceSzhuna.Lskel_string1: 95*53a483ceSzhuna .asciz "hello.dwo" # string offset=39 96*53a483ceSzhuna .section .debug_str.dwo,"eMS",@progbits,1 97*53a483ceSzhuna.Linfo_string0: 98*53a483ceSzhuna .asciz "hello" # string offset=0 99*53a483ceSzhuna.Linfo_string1: 100*53a483ceSzhuna .asciz "clang version 11.1.0 (https://github.com/llvm/llvm-project.git 173544ee3d09cdce8665f2097f677c31e1f1a9a1)" # string offset=6 101*53a483ceSzhuna.Linfo_string2: 102*53a483ceSzhuna .asciz "hello.c" # string offset=111 103*53a483ceSzhuna.Linfo_string3: 104*53a483ceSzhuna .asciz "hello.dwo" # string offset=119 105*53a483ceSzhuna .section .debug_str_offsets.dwo,"e",@progbits 106*53a483ceSzhuna .long 0 107*53a483ceSzhuna .long 6 108*53a483ceSzhuna .long 111 109*53a483ceSzhuna .long 119 110*53a483ceSzhuna .section .debug_info.dwo,"e",@progbits 111*53a483ceSzhuna .long 4294967266 # 2^32 - 30 #33 # Length of Unit 112*53a483ceSzhuna .short 4 # DWARF version number 113*53a483ceSzhuna .long 0 # Offset Into Abbrev. Section 114*53a483ceSzhuna .byte 8 # Address Size (in bytes) 115*53a483ceSzhuna .byte 1 # Abbrev [1] 0xb:0x1a DW_TAG_compile_unit 116*53a483ceSzhuna .byte 1 # DW_AT_producer 117*53a483ceSzhuna .short 12 # DW_AT_language 118*53a483ceSzhuna .byte 2 # DW_AT_name 119*53a483ceSzhuna .byte 3 # DW_AT_GNU_dwo_name 120*53a483ceSzhuna .quad -94954012350180462 # DW_AT_GNU_dwo_id 121*53a483ceSzhuna .byte 2 # Abbrev [2] 0x19:0xb DW_TAG_subprogram 122*53a483ceSzhuna .byte 0 # DW_AT_low_pc 123*53a483ceSzhuna .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc 124*53a483ceSzhuna .byte 1 # DW_AT_frame_base 125*53a483ceSzhuna .byte 86 126*53a483ceSzhuna .byte 0 # DW_AT_name 127*53a483ceSzhuna .byte 1 # DW_AT_decl_file 128*53a483ceSzhuna .byte 3 # DW_AT_decl_line 129*53a483ceSzhuna # DW_AT_external 130*53a483ceSzhuna .byte 0 # End Of Children Mark 131*53a483ceSzhuna .fill 4294967233 # 2^32 - 30 - 33 132*53a483ceSzhuna .section .debug_abbrev.dwo,"e",@progbits 133*53a483ceSzhuna .byte 1 # Abbreviation Code 134*53a483ceSzhuna .byte 17 # DW_TAG_compile_unit 135*53a483ceSzhuna .byte 1 # DW_CHILDREN_yes 136*53a483ceSzhuna .byte 37 # DW_AT_producer 137*53a483ceSzhuna .ascii "\202>" # DW_FORM_GNU_str_index 138*53a483ceSzhuna .byte 19 # DW_AT_language 139*53a483ceSzhuna .byte 5 # DW_FORM_data2 140*53a483ceSzhuna .byte 3 # DW_AT_name 141*53a483ceSzhuna .ascii "\202>" # DW_FORM_GNU_str_index 142*53a483ceSzhuna .ascii "\260B" # DW_AT_GNU_dwo_name 143*53a483ceSzhuna .ascii "\202>" # DW_FORM_GNU_str_index 144*53a483ceSzhuna .ascii "\261B" # DW_AT_GNU_dwo_id 145*53a483ceSzhuna .byte 7 # DW_FORM_data8 146*53a483ceSzhuna .byte 0 # EOM(1) 147*53a483ceSzhuna .byte 0 # EOM(2) 148*53a483ceSzhuna .byte 2 # Abbreviation Code 149*53a483ceSzhuna .byte 46 # DW_TAG_subprogram 150*53a483ceSzhuna .byte 0 # DW_CHILDREN_no 151*53a483ceSzhuna .byte 17 # DW_AT_low_pc 152*53a483ceSzhuna .ascii "\201>" # DW_FORM_GNU_addr_index 153*53a483ceSzhuna .byte 18 # DW_AT_high_pc 154*53a483ceSzhuna .byte 6 # DW_FORM_data4 155*53a483ceSzhuna .byte 64 # DW_AT_frame_base 156*53a483ceSzhuna .byte 24 # DW_FORM_exprloc 157*53a483ceSzhuna .byte 3 # DW_AT_name 158*53a483ceSzhuna .ascii "\202>" # DW_FORM_GNU_str_index 159*53a483ceSzhuna .byte 58 # DW_AT_decl_file 160*53a483ceSzhuna .byte 11 # DW_FORM_data1 161*53a483ceSzhuna .byte 59 # DW_AT_decl_line 162*53a483ceSzhuna .byte 11 # DW_FORM_data1 163*53a483ceSzhuna .byte 63 # DW_AT_external 164*53a483ceSzhuna .byte 25 # DW_FORM_flag_present 165*53a483ceSzhuna .byte 0 # EOM(1) 166*53a483ceSzhuna .byte 0 # EOM(2) 167*53a483ceSzhuna .byte 0 # EOM(3) 168*53a483ceSzhuna .section .debug_addr,"",@progbits 169*53a483ceSzhuna.Laddr_table_base0: 170*53a483ceSzhuna .quad .Lfunc_begin0 171*53a483ceSzhuna .section .debug_gnu_pubnames,"",@progbits 172*53a483ceSzhuna .long .LpubNames_end0-.LpubNames_begin0 # Length of Public Names Info 173*53a483ceSzhuna.LpubNames_begin0: 174*53a483ceSzhuna .short 2 # DWARF Version 175*53a483ceSzhuna .long .Lcu_begin0 # Offset of Compilation Unit Info 176*53a483ceSzhuna .long 48 # Compilation Unit Length 177*53a483ceSzhuna .long 25 # DIE offset 178*53a483ceSzhuna .byte 48 # Attributes: FUNCTION, EXTERNAL 179*53a483ceSzhuna .asciz "hello" # External Name 180*53a483ceSzhuna .long 0 # End Mark 181*53a483ceSzhuna.LpubNames_end0: 182*53a483ceSzhuna .section .debug_gnu_pubtypes,"",@progbits 183*53a483ceSzhuna .long .LpubTypes_end0-.LpubTypes_begin0 # Length of Public Types Info 184*53a483ceSzhuna.LpubTypes_begin0: 185*53a483ceSzhuna .short 2 # DWARF Version 186*53a483ceSzhuna .long .Lcu_begin0 # Offset of Compilation Unit Info 187*53a483ceSzhuna .long 48 # Compilation Unit Length 188*53a483ceSzhuna .long 0 # End Mark 189*53a483ceSzhuna.LpubTypes_end0: 190*53a483ceSzhuna .ident "clang version 11.1.0 (https://github.com/llvm/llvm-project.git 173544ee3d09cdce8665f2097f677c31e1f1a9a1)" 191*53a483ceSzhuna .section ".note.GNU-stack","",@progbits 192*53a483ceSzhuna .addrsig 193*53a483ceSzhuna .addrsig_sym printf 194*53a483ceSzhuna .section .debug_line,"",@progbits 195*53a483ceSzhuna.Lline_table_start0: