Sorry about that disinformation. The man page doesn't provide
the necessary details - but running "objdump -H" does (and the
-H help option *is* called out in the man page).
----- Original Message -----
From: "Fuxin Zhang" <fxzhang@ict.ac.cn>
To: "Kevin D. Kissell" <kevink@mips.com>
Sent: Thursday, October 14, 2004 12:56
Subject: Re: Strange instruction
>
>
> Kevin D. Kissell wrote:
>
> >In all fairness, the syntax is in he "man" page for objdump, so
> >
> >
> The man page does mention the option -m
>
> -m machine
> --architecture=machine
> Specify the architecture to use when disassembling object
> files.
> This can be useful when disassembling object files which
> do not
> describe architecture information, such as S-records. You
> can list
> the available architectures with the -i option.
> but it does not mention how to specify a machine, although I did
> find it in
> objdump --help later:)
>
> debian GNU objdump 2.14.90.0.7 20031029
>
> >one doesn't really have to read the sources to figure it out!
> >But the question of whether the default mode of objdump
> >should be the minimum 32-bit legacy instruction set is a good
> >one. Not many currenly used MIPS processors are MIPS I.
> >I understand that disassembling advanced instructions that are
> >not supported by a particular CPU as if they were normal can
> >cause confusion and error, but perhaps the default would be to
> >disassmble everything as MIPS64 rev 2, but with all instructions
> >that are not in MIPS I flagged somehow, perhaps with a message
> >after the assembly code to indicate the extended ISA level? e.g.
> >
> >a0000650: 07400003 bltz k0,a0000660 <nmi_handler+0x1c>
> >
> >a0000654: 03a0d82d move k1,sp *mips3*
> >a0000658: 3c1ba020 lui k1,0xa020
> >
> >Where specifying -m mips:isa64 or -m mips:4000 would suppress the warnings
> >on MIPS64 or MIPS III instructions respectively. Just a thought...
> >
> >----- Original Message -----
> >From: "Fuxin Zhang" <fxzhang@ict.ac.cn>
> >To: "Dmitriy Tochansky" <toch@dfpost.ru>
> >Cc: <linux-mips@linux-mips.org>
> >Sent: Thursday, October 14, 2004 10:45
> >Subject: Re: Strange instruction
> >
> >
> >
> >
> >>objdump -d -mmips:4000 vmlinux to force it regconize all MIPS III
> >>instructions
> >>
> >>I think this option should be renamed( i had try -mips3 -mmips3 etc.
> >>before i find it
> >>by reading the source code)
> >> or the default should be changed.
> >>
> >>Dmitriy Tochansky wrote:
> >>
> >>
> >>
> >>>Hello!
> >>>
> >>>When starts kernel for my au1500 board reseting board. After disassembling
> >>>I found instruction
> >>>which reseting board. Here is few strings of "mipsel-linux-objdump -D
> >>>vmlinux" output:
> >>>
> >>>---
> >>>
> >>>a0000650: 07400003 bltz k0,a0000660 <nmi_handler+0x1c>
> >>>
> >>>a0000654: 03a0d82d 0x3a0d82d
> >>>
> >>>a0000658: 3c1ba020 lui k1,0xa020
> >>>
> >>>---
> >>>
> >>>Base address changed by me.
> >>>
> >>>What is A0000654? There is board resets.
> >>>
> >>>
> >
> >
> >
> >
>
|