c505837e67
This patch activates -ffunction-sections and -fdata-sections for the
compiler and --gc-sections for the linker. This will strip out all
unused functions and static/global variables from the final binaries and
reduce the amount of data we need to read over SPI.
A quick test with ToT images shows a 2.5k (13%) / 10k (29%) / 12k (28%)
reduction on Nyan and 3k (38%) / 23k (50%) / 13k (29%) on Pit,
respectively for bootblock / romstage / ramstage.
Change-Id: I052411d4ad190d0395921ac4d4677341fb91568a
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/177111
(cherry picked from commit 5635b13877)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6904
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
59 lines
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1.4 KiB
Text
59 lines
No EOL
1.4 KiB
Text
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2006 Advanced Micro Devices, Inc.
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* Copyright (C) 2008-2010 coresystems GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* We use ELF as output format. So that we can debug the code in some form. */
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OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
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OUTPUT_ARCH(arm)
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INCLUDE ldoptions
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PHDRS
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{
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to_load PT_LOAD;
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}
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ENTRY(_start)
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TARGET(binary)
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SECTIONS
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{
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. = CONFIG_BOOTBLOCK_BASE;
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.bootblock . : {
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*(.start);
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KEEP(*(.id));
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*(.text);
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*(.text.*);
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*(.rodata);
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*(.rodata.*);
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*(.data);
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*(.data.*);
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*(.bss);
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*(.bss.*);
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*(.sbss);
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*(.sbss.*);
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} : to_load = 0xff
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/DISCARD/ : {
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*(.comment)
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*(.note)
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*(.comment.*)
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*(.note.*)
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*(.ARM.*)
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}
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} |