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https://github.com/AsahiLinux/u-boot
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f62fb99941
A recent gcc added a new unaligned rodata section called '.rodata.str1.1', which needs to be added the the linker script. Instead of just adding this one section, we use a wildcard ".rodata*" to get all rodata linker section gcc has now and might add in the future. However, '*(.rodata*)' by itself will result in sub-optimal section ordering. The sections will be sorted by object file, which causes extra padding between the unaligned rodata.str.1.1 of one object file and the aligned rodata of the next object file. This is easy to fix by using the SORT_BY_ALIGNMENT command. This patch has not be tested one most of the boards modified. Some boards have a linker script that looks something like this: *(.text) . = ALIGN(16); *(.rodata) *(.rodata.str1.4) *(.eh_frame) I change this to: *(.text) . = ALIGN(16); *(.eh_frame) *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) This means the start of rodata will no longer be 16 bytes aligned. However, the boundary between text and rodata/eh_frame is still aligned to 16 bytes, which is what I think the real purpose of the ALIGN call is. Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
159 lines
3.5 KiB
Text
159 lines
3.5 KiB
Text
/* Linker script for Gaisler Research AB's GRSIM LEON3 simulator.
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*
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* (C) Copyright 2007
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* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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OUTPUT_FORMAT("elf32-sparc", "elf32-sparc", "elf32-sparc")
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OUTPUT_ARCH(sparc)
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ENTRY(_start)
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SECTIONS
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{
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/* Read-only sections, merged into text segment: */
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. = + SIZEOF_HEADERS;
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.interp : { *(.interp) }
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.hash : { *(.hash) }
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.dynsym : { *(.dynsym) }
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.dynstr : { *(.dynstr) }
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.rel.text : { *(.rel.text) }
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.rela.text : { *(.rela.text) }
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.rel.data : { *(.rel.data) }
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.rela.data : { *(.rela.data) }
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.rel.rodata : { *(.rel.rodata) }
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.rela.rodata : { *(.rela.rodata) }
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.rel.got : { *(.rel.got) }
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.rela.got : { *(.rela.got) }
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.rel.ctors : { *(.rel.ctors) }
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.rela.ctors : { *(.rela.ctors) }
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.rel.dtors : { *(.rel.dtors) }
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.rela.dtors : { *(.rela.dtors) }
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.rel.bss : { *(.rel.bss) }
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.rela.bss : { *(.rela.bss) }
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.rel.plt : { *(.rel.plt) }
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.rela.plt : { *(.rela.plt) }
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.init : { *(.init) }
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.plt : { *(.plt) }
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.text : {
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_load_addr = .;
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_text = .;
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*(.start)
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cpu/leon3/start.o (.text)
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/* 8k is the same as the PROM offset from end of main memory, (CONFIG_SYS_PROM_SIZE) */
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. = ALIGN(8192);
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/* PROM CODE, Will be relocated to the end of memory,
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* no global data accesses please.
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*/
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__prom_start = .;
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*(.prom.pgt)
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*(.prom.data)
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*(.prom.text)
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. = ALIGN(16);
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__prom_end = .;
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*(.text)
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*(.fixup)
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*(.gnu.warning)
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/* *(.got1)*/
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. = ALIGN(16);
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*(.eh_frame)
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*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
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}
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. = ALIGN(4);
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_etext = .;
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/* CMD Table */
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__u_boot_cmd_start = .;
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.u_boot_cmd : { *(.u_boot_cmd) }
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. = ALIGN(4);
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__u_boot_cmd_end = .;
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.data :
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{
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*(.data)
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*(.data1)
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*(.data.rel)
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*(.data.rel.*)
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*(.sdata)
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*(.sdata2)
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*(.dynamic)
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CONSTRUCTORS
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}
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_edata = .;
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PROVIDE (edata = .);
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. = ALIGN(4);
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__got_start = .;
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.got : {
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*(.got)
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/* *(.data.rel)
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*(.data.rel.local)*/
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. = ALIGN(16);
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}
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__got_end = .;
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/* .data.rel : { } */
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. = ALIGN(4096);
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__init_begin = .;
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.text.init : { *(.text.init) }
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.data.init : { *(.data.init) }
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. = ALIGN(4096);
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__init_end = .;
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__bss_start = .;
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.bss :
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{
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*(.sbss) *(.scommon)
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*(.dynbss)
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*(.bss)
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*(COMMON)
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. = ALIGN(16); /* to speed clearing of bss up */
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}
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__bss_end = . ;
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_end = . ;
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PROVIDE (end = .);
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/* Relocated into main memory */
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/* Start of main memory */
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/*. = 0x40000000;*/
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.stack (NOLOAD) : { *(.stack) }
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/* PROM CODE */
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/* global data in RAM passed to kernel after booting */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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}
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