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Subject: Re: [PATCH] powerpc: vmlinux.lds: Drop Binutils 2.18 workarounds
To: Segher Boessenkool <segher@kernel.crashing.org>
References: <20190321003253.22100-1-joel@jms.id.au>
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From: Christophe Leroy <christophe.leroy@c-s.fr>
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Date: Wed, 27 Mar 2019 09:56:30 +0100
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Le 26/03/2019 à 21:12, Segher Boessenkool a écrit :
> On Tue, Mar 26, 2019 at 08:28:58PM +0100, Christophe Leroy wrote:
>>
>>
>> Le 26/03/2019 à 19:19, Segher Boessenkool a écrit :
>>> On Tue, Mar 26, 2019 at 07:55:33AM +0000, Christophe Leroy wrote:
>>>>     STACK off    0x00000000 vaddr 0x00000000 paddr 0x00000000 align 2**4
>>>>           filesz 0x00000000 memsz 0x00000000 flags rwx
>>>
>>> You need to prevent this one somehow.  What object file forces this?
>>
>> mpc885_ads_defconfig
> 
> No, which object file, ".o file".  Not defconfig :-)
> 

Ok, how to I know that ? Is it based on some file flags or some headers ?

Here is the list of headers in vmlinux.o, is there one that shouldn't 
exist ?


vmlinux.o:     file format elf32-powerpc

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
   0 .text         003320c0  00000000  00000000  00001000  2**12
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   1 .head.text    00002340  00000000  00000000  003330c0  2**0
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   2 .init.text    00017cb8  00000000  00000000  00335400  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   3 .text.unlikely 00004154  00000000  00000000  0034d0b8  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   4 .ref.text     000013f0  00000000  00000000  0035120c  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   5 .softirqentry.text 00000258  00000000  00000000  003525fc  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   6 .sched.text   00003930  00000000  00000000  00352854  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   7 .cpuidle.text 0000007c  00000000  00000000  00356184  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   8 .meminit.text 00000584  00000000  00000000  00356200  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
   9 .exit.text    00000800  00000000  00000000  00356784  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  10 .rodata       0001d7a7  00000000  00000000  00356f90  2**4
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  11 .init.rodata  00000790  00000000  00000000  00374738  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  12 .rodata.str1.4 00022329  00000000  00000000  00374ec8  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, DATA
  13 __param       000003c0  00000000  00000000  003971f4  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  14 .note.Linux   00000018  00000000  00000000  003975b4  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, DATA
  15 __ex_table    00000ca8  00000000  00000000  003975cc  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  16 __ftr_alt_97  00000008  00000000  00000000  00398274  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, DATA
  17 __ftr_fixup   00000198  00000000  00000000  00398280  2**3
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  18 __reservedmem_of_table 000000c4  00000000  00000000  00398418  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  19 __irqchip_of_table_end 000000c4  00000000  00000000  003984dc  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, DATA
  20 __modver      00000008  00000000  00000000  003985a0  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  21 __reservedmem_of_table_end 000000c4  00000000  00000000  003985a8  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, DATA
  22 .eh_frame     00134eb8  00000000  00000000  0039866c  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  23 .fixup        00000cc8  00000000  00000000  004cd524  2**0
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  24 .data         00013668  00000000  00000000  004cf000  2**12
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  25 __bug_table   00006ce4  00000000  00000000  004e2668  2**0
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  26 .data..read_mostly 00001ce8  00000000  00000000  004e9350  2**3
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  27 .init.data    0000244c  00000000  00000000  004eb038  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  28 .init.setup   0000039c  00000000  00000000  004ed484  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  29 .initcallrootfs.init 00000004  00000000  00000000  004ed820  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  30 .data..page_aligned 00003000  00000000  00000000  004ee000  2**12
                   CONTENTS, ALLOC, LOAD, DATA
  31 .initcall3.init 00000008  00000000  00000000  004f1000  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  32 .initcallearly.init 00000010  00000000  00000000  004f1008  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  33 .initcall6.init 00000120  00000000  00000000  004f1018  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  34 .initcall4.init 00000080  00000000  00000000  004f1138  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  35 .data.once    0000009e  00000000  00000000  004f11b8  2**0
                   CONTENTS, ALLOC, LOAD, DATA
  36 .initcall1.init 00000048  00000000  00000000  004f1258  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  37 .initcall7.init 00000030  00000000  00000000  004f12a0  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  38 .machine.desc 000000e0  00000000  00000000  004f12d0  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  39 .data..cacheline_aligned 00005000  00000000  00000000  004f13b0  2**4
                   CONTENTS, ALLOC, LOAD, DATA
  40 .data..ro_after_init 000004b8  00000000  00000000  004f63b0  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  41 .initcall2.init 00000018  00000000  00000000  004f6868  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  42 .initcall5.init 00000070  00000000  00000000  004f6880  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  43 .meminit.data 00000010  00000000  00000000  004f68f0  2**2
                   CONTENTS, ALLOC, LOAD, DATA
  44 .ref.data     00000578  00000000  00000000  004f6900  2**2
                   CONTENTS, ALLOC, LOAD, DATA
  45 .exitcall.exit 000000b0  00000000  00000000  004f6e78  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  46 .initcall0.init 0000000c  00000000  00000000  004f6f28  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  47 .con_initcall.init 00000004  00000000  00000000  004f6f34  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  48 .initcall7s.init 00000004  00000000  00000000  004f6f38  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  49 .data..shared_aligned 00000118  00000000  00000000  004f6f40  2**4
                   CONTENTS, ALLOC, LOAD, DATA
  50 .sdata        00000188  00000000  00000000  004f7058  2**3
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
  51 .sbss         000002d4  00000000  00000000  004f71e0  2**3
                   ALLOC
  52 .bss          0001e728  00000000  00000000  004f71e0  2**4
                   ALLOC
  53 .stab         00000270  00000000  00000000  004f71e0  2**2
                   CONTENTS, RELOC, READONLY, DEBUGGING
  54 .stabstr      00000335  00000000  00000000  004f7450  2**0
                   CONTENTS, READONLY, DEBUGGING
  55 .comment      0000339c  00000000  00000000  004f7785  2**0
                   CONTENTS, READONLY
  56 .note.GNU-stack 00000000  00000000  00000000  004fab21  2**0
                   CONTENTS, READONLY, CODE
  57 .debug_aranges 000077e8  00000000  00000000  004fab28  2**3
                   CONTENTS, RELOC, READONLY, DEBUGGING
  58 .debug_info   030a43d8  00000000  00000000  00502310  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
  59 .debug_abbrev 0018bdc0  00000000  00000000  035a66e8  2**0
                   CONTENTS, READONLY, DEBUGGING
  60 .debug_line   005d69b9  00000000  00000000  037324a8  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
  61 .debug_frame  00134eb8  00000000  00000000  03d08e64  2**2
                   CONTENTS, RELOC, READONLY, DEBUGGING
  62 .debug_str    01b24fc1  00000000  00000000  03e3dd1c  2**0
                   CONTENTS, READONLY, DEBUGGING
  63 .debug_loc    00242597  00000000  00000000  05962cdd  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
  64 .debug_ranges 001ea010  00000000  00000000  05ba5274  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
  65 .gnu.attributes 00000012  00000000  00000000  05d8f284  2**0
                   CONTENTS, READONLY


Christophe