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Re: 2.4 kernels + >=binutils-2.14.90.0.8

To: linux-mips@linux-mips.org
Subject: Re: 2.4 kernels + >=binutils-2.14.90.0.8
From: Kumba <kumba@gentoo.org>
Date: Mon, 08 Mar 2004 21:15:13 -0500
In-reply-to: <20040309013841.GI16163@rembrandt.csv.ica.uni-stuttgart.de>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <404D0132.3020202@gentoo.org> <20040308234450.GF16163@rembrandt.csv.ica.uni-stuttgart.de> <404D0A18.6050802@gentoo.org> <20040309003447.GH16163@rembrandt.csv.ica.uni-stuttgart.de> <404D1909.1020005@gentoo.org> <20040309013841.GI16163@rembrandt.csv.ica.uni-stuttgart.de>
Reply-to: kumba@gentoo.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113
Thiemo Seufer wrote:

It looks like that pax patch makes the difference.

Speculation:
With this large alignment, the load would overwrite the exception
handlers at 0x80000000 if the firmware wouldn't recognize this area
as already in use. Reducing the alignment to 4k may improve things.

Btw, an empty segment with no section assigned looks like a bug to me.

Btw2, converting the non-writable segment into a writeable one
doesn't look like an improvement (but doesn't matter much).

Well, I re-generated my cross-compiler w/o the patch, doesn't seem to have affected much.

I'll strip the remaining patches out, and see what the outcome is (although the remaining patches have been in gentoo's binutils since 2.13.* and haven't had issues).


--Kumba

-------------------------------------------------

# mips-unknown-linux-gnu-readelf --version
GNU readelf 2.15.90.0.1.1 20040303
Copyright 2004 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.



# mips-unknown-linux-gnu-readelf -l vmlinux

Elf file type is EXEC (Executable file)
Entry point 0x88144040
There are 2 program headers, starting at offset 52

Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  REGINFO        0x1573c0 0x881573c0 0x881573c0 0x00018 0x00018 R   0x4
LOAD 0x000000 0x88000000 0x88000000 0x16d000 0x194400 RWE 0x10000

 Section to Segment mapping:
  Segment Sections...
   00     .reginfo
01 .text .fixup .kstrtab __ex_table __ksymtab .data.init_task .text.init .data.init .setup.init .initcall.init .data.cacheline_aligned .reginfo .data .bss



# mips-unknown-linux-gnu-readelf -S vmlinux
There are 23 section headers, starting at offset 0x19188c:

Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al [ 0] NULL 00000000 000000 000000 00 0 0 0 [ 1] .text PROGBITS 88002000 002000 137790 00 AX 0 0 32 [ 2] .fixup PROGBITS 88139790 139790 00121c 00 AX 0 0 1 [ 3] .kstrtab PROGBITS 8813a9ac 13a9ac 004094 00 A 0 0 4 [ 4] __ex_table PROGBITS 8813ea40 13ea40 0016f8 00 A 0 0 4 [ 5] __dbe_table PROGBITS 88140138 140138 000000 00 A 0 0 1 [ 6] __ksymtab PROGBITS 88140138 140138 001e88 00 A 0 0 4 [ 7] .data.init_task PROGBITS 88142000 142000 002000 00 WA 0 0 8 [ 8] .text.init PROGBITS 88144000 144000 010bb4 00 AX 0 0 4 [ 9] .data.init PROGBITS 88154bb4 154bb4 000724 00 WA 0 0 4 [10] .setup.init PROGBITS 881552e0 1552e0 0000b8 00 WA 0 0 4 [11] .initcall.init PROGBITS 88155398 155398 00008c 00 WA 0 0 4 [12] .data.cacheline_a PROGBITS 88156000 156000 0013c0 00 WA 0 0 32 [13] .reginfo MIPS_REGINFO 881573c0 1573c0 000018 18 A 0 0 4 [14] .data PROGBITS 88158000 158000 015000 00 WA 0 0 4096 [15] .sbss NOBITS 8816d000 16d000 000000 00 WAp 0 0 4 [16] .bss NOBITS 8816d000 16d000 027400 00 WA 0 0 32 [17] .comment PROGBITS 88194400 16d000 0052c6 00 0 0 1 [18] .pdr PROGBITS 00000000 1722c8 01f4e0 00 0 0 4 [19] .mdebug.abi32 PROGBITS 00000000 1917a8 000000 00 0 0 1 [20] .shstrtab STRTAB 00000000 1917a8 0000e1 00 0 0 1 [21] .symtab SYMTAB 00000000 191c24 020520 10 22 da1 4 [22] .strtab STRTAB 00000000 1b2144 021f71 00 0 0 1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings)
  I (info), L (link order), G (group), x (unknown)
  O (extra OS processing required) o (OS specific), p (processor specific)


-----------------------------


>> boot -f 2425x1

Cannot load scsi(0)disk(4)rdisk(0)partition(8)/2425x1.
Text start 0x8000000, size 0x194400 doesn't fit in a FreeMemory area.
Unable to load 2425x1: ``2425x1'' is not a valid file to boot.



--
"Such is oft the course of deeds that move the wheels of the world: small hands do them because they must, while the eyes of the great are elsewhere." --Elrond

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