[Bug binutils/26405] New: [objdump, readelf] - PT_OPENBSD_* segments are not recognised.

[georgerim at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26405

            Bug ID: 26405
           Summary: [objdump, readelf] - PT_OPENBSD_* segments are not
                    recognised.
           Product: binutils
           Version: 2.36 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: georgerim at gmail dot com
  Target Milestone: ---

Created attachment 12779
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12779&action=edit
sample test object with PT_OPENBSD_* segments

Currently, both objdump/readelf tools do not recognise PT_OPENBSD_* segments,
defined as:

PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data.
PT_OPENBSD_WXNEEDED = 0x65a3dbe7,  // Program does W^X violations.
PT_OPENBSD_BOOTDATA = 0x65a41be6,  // Section for boot arguments.

E.g., "objdump -p 1.o" prints:

Program Header:
0x65a3dbe6 off    0x0000000000000000 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
         filesz 0x0000000000000000 memsz 0x0000000000000000 flags ---
0x65a3dbe7 off    0x0000000000000000 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
         filesz 0x0000000000000000 memsz 0x0000000000000000 flags ---
0x65a41be6 off    0x0000000000000000 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
         filesz 0x0000000000000000 memsz 0x0000000000000000 flags ---

The expected output is:

OPENBSD_RANDOMIZE off    0x0000000000000000 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
     filesz 0x0000000000000000 memsz 0x0000000000000000 flags ---
OPENBSD_WXNEEDED off    0x0000000000000000 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
     filesz 0x0000000000000000 memsz 0x0000000000000000 flags ---
OPENBSD_BOOTDATA off    0x0000000000000000 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
     filesz 0x0000000000000000 memsz 0x0000000000000000 flags ---

"readelf 1.o --program-headers" prints:

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOOS+0x5a3dbe6 0x0000000000000000 0x0000000000000000 0x0000000000000000
                 0x0000000000000000 0x0000000000000000         0x1
  LOOS+0x5a3dbe7 0x0000000000000000 0x0000000000000000 0x0000000000000000
                 0x0000000000000000 0x0000000000000000         0x1
  LOOS+0x5a41be6 0x0000000000000000 0x0000000000000000 0x0000000000000000
                 0x0000000000000000 0x0000000000000000         0x1

The expected output is:

Program Headers:
  Type              Offset             VirtAddr           PhysAddr
                    FileSiz            MemSiz              Flags  Align
  OPENBSD_RANDOMIZE 0x0000000000000000 0x0000000000000000 0x0000000000000000
                    0x0000000000000000 0x0000000000000000         0x1
  OPENBSD_WXNEEDED  0x0000000000000000 0x0000000000000000 0x0000000000000000
                    0x0000000000000000 0x0000000000000000         0x1
  OPENBSD_BOOTDATA  0x0000000000000000 0x0000000000000000 0x0000000000000000
                    0x0000000000000000 0x0000000000000000         0x1

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