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Re: ld/emulparams/sparc*.sh NOP missing in all but one file
- From: Joel Sherrill <joel dot sherrill at oarcorp dot com>
- To: "binutils at sourceware dot org" <binutils at sourceware dot org>
- Date: Wed, 26 May 2010 14:16:09 -0500
- Subject: Re: ld/emulparams/sparc*.sh NOP missing in all but one file
- References: <4BFD5BA8.10307@oarcorp.com>
On 05/26/2010 12:34 PM, Joel Sherrill wrote:
Hi,
I am noticing semi-random values for SPARC
executables when inserting nops for alignment
between methods. Doing a grep, I see that
only one emulparams file for SPARC has a NOP
pattern
elf64_sparc.sh:NOP=0x01000000
Shouldn't the rest of the sparc files have this
also?
I have modified elf32_sparc.sh to add this line:
NOP=0x01000000
That is showing up as the =XXX fill pattern in the
ld scripts. But it does not seem ld in binutils 2.20.1
is honoring it. This is the disassembly from objdump.
Even the address for the call is bogus.
4000db40: 81 c7 e0 08 ret
4000db44: 81 e8 00 00 restore
4000db48: 40 00 dc 74 call 40044d18 <_end+0x268c0>
4000db4c: 40 00 dc 94 call 40044d9c <_end+0x26944>
4000db50: 40 00 dc 8c call 40044d80 <_end+0x26928>
4000db54: 40 00 dc 8c call 40044d84 <_end+0x2692c>
4000db58: 40 00 dc b4 call 40044e28 <_end+0x269d0>
4000db5c: 40 00 dc a8 call 40044dfc <_end+0x269a4>
4000db60: 40 00 dc cc call 40044e90 <_end+0x26a38>
Any ideas on what to look for that might be going wrong?
--joel