[PATCH] add section alignment/size hooks to gold plugin interface, revised

[H.J. Lu]

On Wed, Mar 9, 2016 at 8:00 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Fri, Mar 4, 2016 at 2:22 PM, Cary Coutant <ccoutant@gmail.com> wrote:
>>> I checked in this:
>>>
>>> commit 3f1f41f55f2fa5d390e57074477b6407302c8c46
>>> Author: H.J. Lu <hjl.tools@gmail.com>
>>> Date:   Fri Mar 4 08:28:12 2016 -0800
>>>
>>>     Add missing ChangeLog entries for commit 82838
>>>
>>>     Fix gold/testsuite/plugin_layout_with_alignment.sh permission.
>>
>> Thanks. I've also pushed this patch to fix a few "2015" entries that
>> should have been "2016".
>>
>
> The test failed with GCC 4.2:
>
> FAIL: plugin_layout_with_alignment.sh (exit: 1)
> ===============================================
>
> incorrect ordering:
> was: bss_item1 bss_item2 bss_item3 bss_item4
> should have been: bss_item3 bss_item1 bss_item4 bss_item2
>
> Does GCC 4.2 support plugin?

GCC 4.2 generates


  [10] .data.v1_a2       PROGBITS        0000000000000000 000264
000002 00  WA  0   0  2
  [11] .data.v2_a1       PROGBITS        0000000000000000 000266
000001 00  WA  0   0  1
  [12] .data.v3_a8       PROGBITS        0000000000000000 000268
000008 00  WA  0   0  8
  [13] .data.v4_a1       PROGBITS        0000000000000000 000270
000003 00  WA  0   0  1
  [14] .bss.v1_a2        NOBITS          0000000000000000 000274
000002 00  WA  0   0  2
  [15] .bss.v2_a1        NOBITS          0000000000000000 000274
000001 00  WA  0   0  1
  [16] .bss.v3_a8        NOBITS          0000000000000000 000278
000008 00  WA  0   0  8
  [17] .bss.v4_a1        NOBITS          0000000000000000 000278
000003 00  WA  0   0  1

and GCC 5 generates

 [ 4] .rodata.v1_a2     PROGBITS        0000000000000000 000040 000002
00   A  0   0  2
  [ 5] .rodata.v2_a1     PROGBITS        0000000000000000 000042
000001 00   A  0   0  1
  [ 6] .rodata.v3_a8     PROGBITS        0000000000000000 000048
000008 00   A  0   0  8
  [ 7] .rodata.v4_a1     PROGBITS        0000000000000000 000050
000007 00   A  0   0  1
  [ 8] .data.v1_a2       PROGBITS        0000000000000000 000058
000002 00  WA  0   0  2
  [ 9] .data.v2_a1       PROGBITS        0000000000000000 00005a
000001 00  WA  0   0  1
  [10] .data.v3_a8       PROGBITS        0000000000000000 000060
000008 00  WA  0   0  8
  [11] .data.v4_a1       PROGBITS        0000000000000000 000068
000003 00  WA  0   0  1
  [12] .bss.v1_a2        NOBITS          0000000000000000 00006c
000002 00  WA  0   0  2
  [13] .bss.v2_a1        NOBITS          0000000000000000 00006c
000001 00  WA  0   0  1
  [14] .bss.v3_a8        NOBITS          0000000000000000 000070
000008 00  WA  0   0  8
  [15] .bss.v4_a1        NOBITS          0000000000000000 000070
000003 00  WA  0   0  1

I got

Expected 12 sections, found 8 sections

with GCC 4.2.

-- 
H.J.