[Bug default/24251] New: Allocatable section after non-allocatable ones

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=24251

            Bug ID: 24251
           Summary: Allocatable section after non-allocatable ones
           Product: dwz
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: default
          Assignee: nobody at sourceware dot org
          Reporter: vries at gcc dot gnu.org
                CC: dwz at sourceware dot org
  Target Milestone: ---

[ This is essentially a refiling of PR21191 - "objcopy --only-keep-debug
creates non-monotonically increasing section offsets", which was closed as
WONTFIX, for dwz. ]

For the example from PR21191, with trunk dwz and objcopy we have:
...
$ cat t.c
int main()
{
}
$ gcc t.c -g 
$ objcopy --only-keep-debug a.out a.debug
$ dwz a.debug
dwz: Allocatable section in a.debug after non-allocatable ones
...

The dwz tool complains that allocatable section .init_array at offset 0xe40:
...
  [17] .init_array       NOBITS           0000000000600e40  00000e40
       0000000000000008  0000000000000008  WA       0     0     8
...
is at a bigger offset than non-allocatable section .debug_info at offset 0x410:
...
  [26] .debug_info       PROGBITS         0000000000000000  00000410
       00000000000002f3  0000000000000000           0     0     1
...

In the original a.out this situation does not occur:
...
  [17] .init_array       INIT_ARRAY       0000000000600e40  00000e40
       0000000000000008  0000000000000008  WA       0     0     8
  [26] .debug_info       PROGBITS         0000000000000000  000011a0
       00000000000002f3  0000000000000000           0     0     1
...

The rationale with which PR21191 was closed as WONTFIX is: "File offset for a
SHT_NOBITS section is irrelevant".

Following that rationale, dwz should not complain here.

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