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Re: Failed to build linux-2.6.34-rc5 when CONFIG_RELOCATABLE=y using gold

From: Wenji Huang <wenji dot huang at oracle dot com>
Cc: binutils at sourceware dot org, elena Zannoni <elena dot zannoni at oracle dot com>, "VAN HEES,KRIS" <kris dot van dot hees at oracle dot com>, Randy Dunlap <randy dot dunlap at oracle dot com>
Date: Tue, 04 May 2010 16:32:27 +0800
Subject: Re: Failed to build linux-2.6.34-rc5 when CONFIG_RELOCATABLE=y using gold
References: <4BCD6951.9010609@oracle.com>
Reply-to: wenji dot huang at oracle dot com

On 04/20/2010 04:44 PM, Wenji Huang wrote:

Hi,

I tried gold as the linker to build linux-2.6.34-rc5 and found that
if I set CONFIG_RELOCATABLE=y, there will be warning like

gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)
GNU gold (GNU Binutils 2.20.1.20100303) 1.9

HOSTCC arch/x86/boot/compressed/relocs
CC drivers/scsi/scsi_wait_scan.mod.o
CC fs/btrfs/btrfs.mod.o
HOSTCC arch/x86/boot/compressed/mkpiggy
RELOCS arch/x86/boot/compressed/vmlinux.relocs
CC fs/configfs/configfs.mod.o
WARNING: Absolute relocations present
Offset Info Type Sym.Value Sym.Name
c101b0d0 00a94b01 R_386_32 c1655000 __init_end
c101b0d5 00a94c01 R_386_32 c15d3000 __init_begin
c101b1be 00a94b01 R_386_32 c1655000 __init_end
c15df7ce 00a94b01 R_386_32 c1655000 __init_end
c15df7d4 00a94c01 R_386_32 c15d3000 __init_begin
c15df871 00a94b01 R_386_32 c1655000 __init_end
c15df876 00a94c01 R_386_32 c15d3000 __init_begin
c13b2848 00af1701 R_386_32 c155088c __start___kcrctab
c13b285c 00af1a01 R_386_32 c155088c __start___kcrctab_gpl
c13b2868 00af1b01 R_386_32 c155088c __start___ksymtab_gpl_future
c13b286c 00af1c01 R_386_32 c155088c __stop___ksymtab_gpl_future
c13b2870 00af1d01 R_386_32 c155088c __start___kcrctab_gpl_future

GZIP arch/x86/boot/compressed/vmlinux.bin.gz

And the built kernel can't start up. But if unset CONFIG_RELOCATABLE,
the warning will disappear and kernel can work well.

Regards,
Wenji


Same result on 2.6.34-rc6, using gold of binutils 2.20.51 snapshots.
But works well using ld instead.

Regards,
Wenji

Follow-Ups:
- Re: Failed to build linux-2.6.34-rc5 when CONFIG_RELOCATABLE=y using gold
  - From: Randy Dunlap

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