[Bug binutils/5488] New: strip doesn't handle PT_NOTE segment properly

[hjl at lucon dot org]

bash-3.2$ cat note-2.s
        .globl _entry
        .text
_entry:
        .byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
        .section .foo,"awx",%progbits
        .byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
        .section .note,"",%note
        .byte 0
bash-3.2$ cat note-2.t
ENTRY(_entry)
PHDRS
{
  data PT_LOAD;
  note PT_NOTE;
}
SECTIONS
{
  . = 0x1000000;
  .text : { *(.text) } :data
  .foo : { *(.foo) } :data
  . = 0x2000000;
  .note : { *(.note) } :note
  /DISCARD/ : { *(*) }
}
bash-3.2$ make
cc -c note-2.s
./ld -Tnote-2.t -o note-2 note-2.o
./strip -R .foo note-2 -o note-2.strip
readelf -Sl note-2
There are 7 section headers, starting at offset 0x200050:

Section Headers:
  [Nr] Name              Type             Address           Offset
       Size              EntSize          Flags  Link  Info  Align
  [ 0]                   NULL             0000000000000000  00000000
       0000000000000000  0000000000000000           0     0     0
  [ 1] .text             PROGBITS         0000000001000000  00200000
       0000000000000010  0000000000000000  AX       0     0     4
  [ 2] .foo              PROGBITS         0000000001000010  00200010
       0000000000000010  0000000000000000 WAX       0     0     1
  [ 3] .note             NOTE             0000000002000000  00200020
       0000000000000001  0000000000000000           0     0     1
  [ 4] .shstrtab         STRTAB           0000000000000000  00200021
       000000000000002c  0000000000000000           0     0     1
  [ 5] .symtab           SYMTAB           0000000000000000  00200210
       0000000000000078  0000000000000018           6     4     8
  [ 6] .strtab           STRTAB           0000000000000000  00200288
       0000000000000008  0000000000000000           0     0     1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings)
  I (info), L (link order), G (group), x (unknown)
  O (extra OS processing required) o (OS specific), p (processor specific)

Elf file type is EXEC (Executable file)
Entry point 0x1000000
There are 2 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOAD           0x0000000000200000 0x0000000001000000 0x0000000001000000
                 0x0000000000000020 0x0000000000000020  RWE    200000
  NOTE           0x0000000000200020 0x0000000002000000 0x0000000002000000
                 0x0000000000000001 0x0000000000000000  R      1

 Section to Segment mapping:
  Segment Sections...
   00     .text .foo 
   01     .note 
readelf -Sl note-2.strip
There are 4 section headers, starting at offset 0x200028:

Section Headers:
  [Nr] Name              Type             Address           Offset
       Size              EntSize          Flags  Link  Info  Align
  [ 0]                   NULL             0000000000000000  00000000
       0000000000000000  0000000000000000           0     0     0
  [ 1] .text             PROGBITS         0000000001000000  00200000
       0000000000000010  0000000000000000  AX       0     0     4
  [ 2] .note             NOTE             0000000002000000  00200010
       0000000000000001  0000000000000000           0     0     1
  [ 3] .shstrtab         STRTAB           0000000000000000  00200011
       0000000000000017  0000000000000000           0     0     1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings)
  I (info), L (link order), G (group), x (unknown)
  O (extra OS processing required) o (OS specific), p (processor specific)

Elf file type is EXEC (Executable file)
Entry point 0x1000000
There are 2 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOAD           0x0000000000200000 0x0000000001000000 0x0000000001000000
                 0x0000000000000010 0x0000000000000010  RWE    200000
  NOTE           0x0000000000000000 0x0000000000000000 0x0000000002000000
                 0x0000000000000000 0x0000000000000000  R      8

 Section to Segment mapping:
  Segment Sections...
   00     .text 
   01     
bash-3.2$ 

As you can see, PT_NOTE segment becomes empty after strip.

-- 
           Summary: strip doesn't handle PT_NOTE segment properly
           Product: binutils
           Version: 2.19 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: hjl at lucon dot org
                CC: bug-binutils at gnu dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=5488

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.