Commit graph

54 commits

Author SHA1 Message Date
Tom Rini
036c9679d2 sh: Use -m2a-nofpu only
Based on reading over the GCC manual, passing both -m2a and -m2a-nofpu
are redundant, as -m2a-nofpu will provide functional code for both.  As
-m2a-nofpu functions with more toolchains and does what is expected,
switch.

Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2018-02-21 23:42:47 +01:00
Tom Rini
34f98a3d2e sh: Fix linking of ms7722se
While it is true that we no longer have 'ppcenv' and similar sections,
including env/embedded.o at all results in the text/etc sections being
available for the rest of the link.  This in turn is required for the
setup used on ms7722se.  This also, likely, needs further fine-tuning.

Fixes: f40ad66fa0 ("arch/sh: don't bring common/env_embedded.o into the link")
Signed-off-by: Tom Rini <trini@konsulko.com>
2017-08-27 11:50:16 -04:00
Thomas Petazzoni
f40ad66fa0 arch/sh: don't bring common/env_embedded.o into the link
The linker script for SuperH brings the .ppcenv and .ppcenvr section
of common/env_embedded.o into the .text section. However, the .ppcenv
section is only ever filled in by env_embedded.o when
CONFIG_SYS_USE_PPCENV is defined, but no platforms in mainline U-Boot
use this.

In addition, common/env_embedded.o is not always built (when you use
CONFIG_ENV_IS_NOWHERE for example), which causes the following build
failure:

Fixes:

  LD      u-boot
/home/thomas/sh4aeb-linux-musl/bin/sh4aeb-linux-ld.bfd: cannot find common/env_embedded.o

We fix this by no longer adding the .ppcenv and .ppcenvr sections from
common/env_embedded.o into the .text section.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2017-08-26 07:40:36 +09:00
Thomas Petazzoni
90340c87e5 arch/sh: allow building in big-endian mode
The SuperH architecture allows to be run in either little or big
endian mode. Some SuperH SoCs get the little vs. big endian decision
through mode pins sampled at reset, so if big endian has been choosen
by HW designers, it cannot be easily changed.

Therefore, it makes sense to allow building U-Boot for SuperH in big
endian mode. To allow this, the only change needed is to adjust the
OUTPUT_FORMAT() in the linker script.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2017-08-26 07:38:39 +09:00
Simon Glass
0649cd0d49 Move environment files from common/ to env/
About a quarter of the files in common/ relate to the environment. It
seems better to put these into their own subdirectory and remove the
prefix.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2017-08-15 08:18:45 -04:00
Vladimir Zapolskiy
76a55989b1 sh: generate position independent code for all platforms
Finally add fpic compilation option to produce relocatable code.
Note that this requires to define CONFIG_NEEDS_MANUAL_RELOC for all
board files, also relocation support still has some limitations
(e.g. a developer should care not to overwrite the executing code or
memset() with zeroes not yet relocated data on malloc init etc.),
which may be fixed while switching to PIE.

Due to short investigation the architecture code is not ready for PIE
linking, this will require some manipulations with .dyn* sections.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
2016-12-02 21:32:54 -05:00
Vladimir Zapolskiy
3500581ef3 sh: share the correct version of start.S among all cpus
It is easy to note that SH2/SH3/SH4 start.S code is practically
the same with a minor difference for SH2 where a short data header is
present. To avoid unwanted code duplication and to automatically
convert SH2 and SH3 platforms to generic board support move fixed SH4
start.S into arch/sh/lib/start.S and share it among all platforms.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:53 -05:00
Vladimir Zapolskiy
9c141b2bd7 sh4: fix start.S by calling board_init_f() after first code relocation
Like on ARM platform keep the first code relocation from a U-boot
image storage to RAM at CONFIG_SYS_TEXT_BASE, then pass execution to a
generic board_init_f() with empty GD flags. If CONFIG_SYS_TEXT_BASE is
equal to a calculated by board_init_f() relocation address there will
be no more code and data copy, however it's worth to mention that the
first copy happens even if $pc on _start is the same as
CONFIG_SYS_TEXT_BASE, on practice this works without a problem.

Also note that _sh_start is renamed back to _start to correct
gd->mon_len calculation by setup_mon_len(), the opposite rename was
done in pre-generic board commit 2024b968ee ("sh: Fix build in start.S").

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:53 -05:00
Vladimir Zapolskiy
bccf09e0e1 sh: add shared relocate_code() function and call board_init_r()
Commits b61e90e6fd ("sh: Drop the arch-specific board init") and
f41e6088eb ("sh: Fix build errors for generic board") left code and
data relocation done in start.S, however further actual U-boot
configuration is not started anymore. Practically SH boards with the
code relocated into the expected position by start.S still can be
booted, so the change adds this option and provides an option how to
relocate code for board_init_r() execution.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:52 -05:00
Vladimir Zapolskiy
8371dabb5f sh: add MEMORY command to a shared linker script
At the moment in runtime all defined sections are copied into or
created in RAM, specify this explicitly to assert potential out of RAM
placements of the sections.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:48 -05:00
Vladimir Zapolskiy
b26d25072f sh: define entry point and reloc_dst inside a linker script
No functional change, concentrate linker script commands in one
place for convenience. Entry point is set to CONFIG_SYS_TEXT_BASE by
default on build, so this option can be omitted from being added to
the linker script.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:48 -05:00
Vladimir Zapolskiy
9ec4a67ef3 sh: place board lowlevel_init code in the beginning of .text
Reference lowlevel_init of all supported SH2A/SH3/SH4/SH4A boards
from a shared linker script, the lowlevel_init function will be called
by a relative address.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:47 -05:00
Vladimir Zapolskiy
3f8b5391ec sh4: use single u-boot linker script for all boards
Three supported SH4/SH4A boards with the bootloader image stored on
SPI flash have own flavour of a linker script, in turn they are equal
among each other. The only difference is that the text from
lowlevel_init.o is placed right after start.o, which makes sense.

Note that .bss section is not marked as NOLOAD, because for about
10 years this is a default option of a GNU linker, either the
attribute is found or not the resulting image file is the same.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:46 -05:00
Vladimir Zapolskiy
b33718c614 sh4: cache: move exported cache manipulation functions into cache.c
No functional change, moving cache manipulation functions into cache.c
allows to collect all of them in a single location and as a pleasant
side effect cache_control() function can be unexported now.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:42 -05:00
Vladimir Zapolskiy
6ab8b961de sh: cache: don't modify CCR from P1 area
cache_wback_all() is a local function and it is called from
cache_control() only, which is in turn jumps to P2 area.

The change fixes an issue when cache_wback_all() returns from P2 to
P1, however cache_control() continues to manipulate with CCR
register, according to the User's Manual this is restricted.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
2016-12-02 21:32:41 -05:00
Vladimir Zapolskiy
c230a37838 sh: cache use jump_to_P2() and back_to_P1() from asm/system.h
Both jump_to_P2() and back_to_P1() functions are found in asm/system.h
header file and functionally they are the same, don't redefine them.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:41 -05:00
Vladimir Zapolskiy
dad2b3005e sh3: remove unused cache.c file from being built
The change is similar to commit 994b56616b ("sh: delete an unused
source file") for SH2, however here the removed cache.c file was
built and included into an image as a dead code.

If it is needed in future the contents can be reused from a similar
arch/sh/cpu/sh4/cache.c file, which is in turn will be moved to
a shared among all core flavours location at arch/sh/lib/cache.c.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:40 -05:00
Vladimir Zapolskiy
0f62bf633f sh4: cache: correct flush_cache() to writeback and invalidate
In common usecases flush_cache() assumes both cache invalidation and
write-back to memory, instead of doing cache invalidation only with
the wrapped 'ocbi' instruction pin flush_cache() to cache invalidation
with memory write-back done by 'ocbp'.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-12-02 21:32:39 -05:00
Vladimir Zapolskiy
ee47c4cb2b sh4: cache: correct dcache flush to invalidate with write-back
In common usecases flush_cache() assumes both cache invalidation and
write-back to memory, thus in flush_dcache_range() implementation
change SH4 cache write-back only instruction 'ocbwb' with cache purge
instruction 'ocbp', according to the User's Manual there should be no
performance penalty for that.

Note that under circumstances only cache invalidation is expected from
flush_cache() call, in these occasional cases the current version of
flush_cache() works, which is a wrapper over invalidate_dcache_range()
at the moment, this will be fixed in the following change.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
2016-12-02 21:32:39 -05:00
Simon Glass
f41e6088eb sh: Fix build errors for generic board
This includes the following fixes:
- Define needed __init_end symbol - see initr_reloc_global_data()
- Drop SH-specific struct bd_info
- Add an empty relocate_code() function

This prevents build errors with generic board, but the code will still need
work. Perhaps this is a better alternative than deleting the code.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:51 -04:00
Rob Herring
7682a99826 remove unnecessary version.h includes
Various files are needlessly rebuilt every time due to the version and
build time changing. As version.h is not actually needed, remove the
include.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Macpaul Lin <macpaul@andestech.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: York Sun <yorksun@freescale.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Philippe Reynes <tremyfr@yahoo.fr>
Cc: Eric Jarrige <eric.jarrige@armadeus.org>
Cc: "David Müller" <d.mueller@elsoft.ch>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Robert Baldyga <r.baldyga@samsung.com>
Cc: Torsten Koschorrek <koschorrek@synertronixx.de>
Cc: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Łukasz Majewski <l.majewski@samsung.com>
2015-03-24 10:50:50 -04:00
Masahiro Yamada
7d2366627e sh: move CONFIG_{SH2, SH2A, SH3, SH4} to Kconfig
This commit moves CONFIG_SH2, CONFIG_SH2A, CONFIG_SH3, CONFIG_SH4
to Kconfig renaming into CONFIG_CPU_SH2, CONFIG_CPU_SH2A,
CONFIG_CPU_SH3, CONFIG_CPU_SH4, respectively because
arch/sh/Kconfig of Linux uses CONFIG_CPU_SH* convention.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-11-13 08:47:58 +09:00
Masahiro Yamada
afc3929fac sh: unify sh2/sh3/sh4 linker scripts
The linker scripts of sh2/sh3/sh4 are almost the same.
The difference among them is essentially only one line.

They can be consolidated into a single file, arch/sh/cpu/u-boot.lds
by re-writing the diffrent line as follows:

	KEEP(*/start.o	(.text))

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-07-24 12:02:23 +09:00
Masahiro Yamada
994b56616b sh: delete an unused source file
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-04-30 07:18:21 +09:00
Masahiro Yamada
08f11151c2 sh: merge compiler flag -ffixed-r13
-ffixed-r13 is defined commonly for sh2, sh3, sh4.
Move it to arch/sh/config.mk

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2014-03-04 09:27:40 -05:00
Masahiro Yamada
aceba5a5cf sh: Do not define -ffreestanding twice
-ffreestanding is defined at the top Makefile for all architectures.
Do not define it twice for SH2A.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2014-03-04 09:27:40 -05:00
Nobuhiro Iwamatsu
6b87abe3ac sh: sh4: Remove CONFIG_SH4A definition from source code
SH4 and SH4A are compatible. But some instructions are different from these.
In Linux kernel, It is treated as a separate CPU, but for now, I think that
there is no need to divide especially in the U-Boot.

This removes CONFIG_SH4A definition from source code, SH4A is treated as SH4.
And this fix white space.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-01-09 12:47:15 +09:00
Nobuhiro Iwamatsu
b1165adfd5 sh: sh4: Add CONFIG_SH4 definition to config.mk of SH4
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-01-08 14:47:40 +09:00
Nobuhiro Iwamatsu
22e7d66181 sh: sh3: Add CONFIG_SH3 definition to config.mk of SH3
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-01-08 14:47:36 +09:00
Nobuhiro Iwamatsu
14eeb926bb sh: sh2: Add CONFIG_SH2 definition to config.mk of SH2
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-01-08 14:13:55 +09:00
Masahiro Yamada
02b3bf390e sh: convert makefiles to Kbuild style
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2013-10-31 13:26:45 -04:00
Masahiro Yamada
61698478a3 sh: Do not include start.o in lib$(CPU).o
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2013-10-31 13:26:45 -04:00
Nobuhiro Iwamatsu
a633a18f90 sh: cache: Change cache API to defines as U-Boot
A chache API of SH is developped by reference in linux kernel.
And API was the same as the linux kernel.
This patch change cache API to defines as U-Boot.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2013-10-17 09:34:39 +09:00
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Tom Rini
0ce033d258 Merge branch 'master' of git://git.denx.de/u-boot-arm
Albert's rework of the linker scripts conflicted with Simon's making
everyone use __bss_end.  We also had a minor conflict over
README.scrapyard being added to in mainline and enhanced in
u-boot-arm/master with proper formatting.

Conflicts:
	arch/arm/cpu/ixp/u-boot.lds
	arch/arm/cpu/u-boot.lds
	arch/arm/lib/Makefile
	board/actux1/u-boot.lds
	board/actux2/u-boot.lds
	board/actux3/u-boot.lds
	board/dvlhost/u-boot.lds
	board/freescale/mx31ads/u-boot.lds
	doc/README.scrapyard
	include/configs/tegra-common.h

Build tested for all of ARM and run-time tested on am335x_evm.

Signed-off-by: Tom Rini <trini@ti.com>
2013-03-18 14:37:18 -04:00
Simon Glass
3929fb0a14 Replace __bss_end__ with __bss_end
Note this is a tree-wide change affecting multiple architectures.

At present we use __bss_start, but mostly __bss_end__. This seems
inconsistent and in a number of places __bss_end is used instead.

Change to use __bss_end for the BSS end symbol throughout U-Boot. This
makes it possible to use the asm-generic/sections.h file on all
archs.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-03-15 16:13:54 -04:00
Albert ARIBAUD
ef123c5253 Refactor linker-generated arrays
Refactor linker-generated array code so that symbols
which were previously linker-generated are now compiler-
generated. This causes relocation records of type
R_ARM_ABS32 to become R_ARM_RELATIVE, which makes
code which uses LGA able to run before relocation as
well as after.

Note: this affects more than ARM targets, as linker-
lists span possibly all target architectures, notably
PowerPC.

Conflicts:
	arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
	arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds
	arch/arm/cpu/armv7/omap-common/u-boot-spl.lds
	board/ait/cam_enc_4xx/u-boot-spl.lds
	board/davinci/da8xxevm/u-boot-spl-da850evm.lds
	board/davinci/da8xxevm/u-boot-spl-hawk.lds
	board/vpac270/u-boot-spl.lds

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2013-03-12 23:28:40 +01:00
Marek Vasut
8b493a5236 common: Discard the __u_boot_cmd section
The command declaration now uses the new LG-array method to generate
list of commands. Thus the __u_boot_cmd section is now superseded and
redundant and therefore can be removed. Also, remove externed symbols
associated with this section from include/command.h .

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
2012-10-22 08:29:42 -07:00
Marek Vasut
556751427b common: Add .u_boot_list into all linker files
Add section for the linker-generated lists into all possible linker
files, so that everyone can easily use these lists. This is mostly
a mechanical adjustment.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
2012-10-22 08:29:42 -07:00
Yoshihiro Shimoda
d185857267 sh: modify checkcpu() for SH-4A
Even if using CPU is SH-4A, the previous code always put "SH4".
This patch fixes it.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2012-08-08 09:50:41 +09:00
Mike Frysinger
172106433b sh: avoid multiple definition errors with cache funcs
Recent builds for SH4 boards fail with a lot of errors like:
	cmd_mem.o: In function 'dcache_invalid_range':
	include/asm/cache.h:25: multiple definition of 'dcache_invalid_range'
	include/asm/cache.h:25: first defined here

This is due to the funcs being defined in the header, but not static
or inline or extern.  So move them to the sh4-specific cache.c file.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2011-12-02 13:46:21 +09:00
Mike Frysinger
4cde1740d2 sh: only add -mno-fdpic if the compiler supports it
Not all SuperH toolchains support -mno-fdpic.  Chances are good that if
the flag doesn't work, it isn't defaulting to the FDPIC ABI, so the flag
isn't needed.  So only add it if it is actually supported.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2011-12-02 13:46:20 +09:00
Mike Frysinger
464c79207c punt unused clean/distclean targets
The top level Makefile does not do any recursion into subdirs when
cleaning, so these clean/distclean targets in random arch/board dirs
never get used.  Punt them all.

MAKEALL didn't report any errors related to this that I could see.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-10-15 22:20:36 +02:00
Nobuhiro Iwamatsu
8cc44418b8 sh: sh2a: Add sh2a optimize to config.mk
Only the optimization of sh2 had been supported up.
This adds the optimization of sh2a.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2011-08-22 13:16:08 +09:00
Phil Edworthy
7fbeb6422d sh: Add Renesas rsk7264 board
The rsk7264 (also know as rsk2+sh7264) is an SH2A based board
with 64MB NAND flash and 64MB SDRAM. It is very similar to the
rsk7203 board.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2011-08-22 13:16:08 +09:00
Po-Yu Chuang
44c6e6591c rename _end to __bss_end__
Currently, _end is used for end of BSS section.  We want _end to mean
end of u-boot image, so we rename _end to __bss_end__ first.

Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>
2011-03-27 19:18:37 +02:00
Nobuhiro Iwamatsu
b52da2aed8 sh: Add KEEP order to start.o section
The start.o section is changed by --gc-section option of ld.
Of this using KEEP order, therefore, evade this problem.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2011-03-16 10:16:34 +09:00
Nobuhiro Iwamatsu
8aba9dceeb Divides variable of linker flags to LDFLAGS-u-boot and LDFLAGS
Linker needs to use the proper endian/bfd flags even when doing partial linking.
LDFLAGS_u-boot sets linker option which is called it when U-boot is built
(u-boot final).
LDFLAGS sets necessary option by partial linking (use in cmd_link_o_target).

CC: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2011-01-25 22:22:30 +01:00
Nobuhiro Iwamatsu
2024b968ee sh: Fix build in start.S
By commit 6d8962e814,
label of _start was not usable in start.S and build fail.
This change label from  _start to _sh_start.

----
arch/sh/cpu/sh4/libsh4.o: In function `_start':
(.text+0x204): multiple definition of `_start'
arch/sh/cpu/sh4/start.o:(.text+0x0): first defined here
----

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2010-11-30 09:30:26 +09:00
Sebastien Carlier
6d8962e814 Switch from archive libraries to partial linking
Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils.  As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".

This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.

The name of each former library archive is preserved except for
extensions which change from ".a" to ".o".  This commit updates
references accordingly where needed, in particular in some linker
scripts.

This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols.  Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.

Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>
2010-11-17 21:02:18 +01:00