[Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28488

--- Comment #6 from Mark Wielaard <mark at klomp dot org> ---
So with on fedora 34, x86_64:

gcc (GCC) 11.2.1 20210728 (Red Hat 11.2.1-1)
GNU gold (version 2.35.2-6.fc34) 1.16
eu-elflint (elfutils) 0.185

$ echo 'int main() { return 0; }' | gcc -x c - -fuse-ld=gold && eu-elflint
--gnu-ld ./a.out
No errors

$ eu-readelf -l a.out 
Program Headers:
  Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz
  Flg Align
  PHDR           0x000040 0x0000000000400040 0x0000000000400040 0x0001f8
0x0001f8 R   0x8
  INTERP         0x000238 0x0000000000400238 0x0000000000400238 0x00001c
0x00001c R   0x1
        [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
  LOAD           0x000000 0x0000000000400000 0x0000000000400000 0x0006d8
0x0006d8 R E 0x1000
  LOAD           0x000e28 0x0000000000401e28 0x0000000000401e28 0x0001e0
0x0001e1 RW  0x1000
  DYNAMIC        0x000e38 0x0000000000401e38 0x0000000000401e38 0x0001a0
0x0001a0 RW  0x8
  NOTE           0x000254 0x0000000000400254 0x0000000000400254 0x000064
0x000064 R   0x4
  GNU_EH_FRAME   0x0006a4 0x00000000004006a4 0x00000000004006a4 0x000034
0x000034 R   0x4
  GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000
0x000000 RW  0x10
  GNU_RELRO      0x000e28 0x0000000000401e28 0x0000000000401e28 0x0001d8
0x0001d8 RW  0x8

 Section to Segment mapping:
  Segment Sections...
   00     
   01      [RO: .interp]
   02      [RO: .interp .note.ABI-tag .note.gnu.property .note.gnu.build-id
.dynsym .dynstr .gnu.hash .gnu.version .gnu.version_r .rela.dyn .init .text
.fini .rodata .eh_frame .eh_frame_hdr]
   03      [RELRO: .fini_array .init_array .dynamic .got .got.plt] .data .bss
   04      [RELRO: .dynamic]
   05      [RO: .note.ABI-tag .note.gnu.property .note.gnu.build-id]
   06      [RO: .eh_frame_hdr]
   07     
   08      [RELRO: .fini_array .init_array .dynamic .got .got.plt]

Note that there is only PT_NOTE segment and it doesn't cover the gold-version
note section because it isn't an allocated note section:

$ eu-readelf -S ./a.out | grep note
[ 2] .note.ABI-tag        NOTE         0000000000400254 00000254 00000020  0 A 
    0   0  4
[ 3] .note.gnu.property   NOTE         0000000000400274 00000274 00000020  0 A 
    0   0  4
[ 4] .note.gnu.build-id   NOTE         0000000000400294 00000294 00000024  0 A 
    0   0  4
[27] .note.gnu.gold-version NOTE         0000000000000000 000029e0 0000001c  0 
      0   0  4

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