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2909a4b78e
By default we are reusing the stack provided by CFE, like it is intended by CFE. On my WRT54GS it is located at 0x8043BF30, so a big kernel image could overwrite it. Relocate it to a different memory region which is still under the 8MB RAM, but in the higher area. We only need this memory region for the stack of the loader, Linux will set up this for its own. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
79 lines
2.4 KiB
Makefile
79 lines
2.4 KiB
Makefile
#
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# Makefile for Broadcom BCM947XX boards
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#
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# Copyright 2001-2003, Broadcom Corporation
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# All Rights Reserved.
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#
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# THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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# KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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# SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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# FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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#
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# Copyright 2004 Manuel Novoa III <mjn3@codepoet.org>
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# Modified to support bzip'd kernels.
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# Of course, it would be better to integrate bunzip capability into CFE.
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#
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# Copyright 2005 Oleg I. Vdovikin <oleg@cs.msu.su>
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# Cleaned up, modified for lzma support, removed from kernel
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#
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TEXT_START := 0x80001000
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BZ_TEXT_START := 0x80600000
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BZ_STACK_START := 0x80700000
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OBJCOPY := $(CROSS_COMPILE)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
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CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
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-fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 -mno-abicalls -fno-pic \
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-ffunction-sections -pipe -mlong-calls -fno-common \
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-mabi=32 -march=mips32 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap
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CFLAGS += -DLOADADDR=$(TEXT_START) -D_LZMA_IN_CB
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ASFLAGS = $(CFLAGS) -D__ASSEMBLY__ -DBZ_TEXT_START=$(BZ_TEXT_START) -DBZ_STACK_START=$(BZ_STACK_START)
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SEDFLAGS := s/BZ_TEXT_START/$(BZ_TEXT_START)/;s/BZ_STACK_START/$(BZ_STACK_START)/;s/TEXT_START/$(TEXT_START)/
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OBJECTS := head.o data.o
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all: loader.gz loader.elf
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# Don't build dependencies, this may die if $(CC) isn't gcc
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dep:
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install:
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loader.gz: loader
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gzip -nc9 $< > $@
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loader.elf: loader.o
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cp $< $@
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loader: loader.o
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$(OBJCOPY) $< $@
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loader.o: loader.lds $(OBJECTS)
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$(LD) -static --gc-sections -no-warn-mismatch -T loader.lds -o $@ $(OBJECTS)
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loader.lds: loader.lds.in Makefile
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@sed "$(SEDFLAGS)" < $< > $@
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data.o: data.lds decompress.image
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$(LD) -no-warn-mismatch -T data.lds -r -o $@ -b binary decompress.image -b elf32-tradlittlemips
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data.lds:
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@echo "SECTIONS { .data : { code_start = .; *(.data) code_stop = .; }}" > $@
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decompress.image: decompress
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$(OBJCOPY) $< $@
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decompress: decompress.lds decompress.o LzmaDecode.o
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$(LD) -static --gc-sections -no-warn-mismatch -T decompress.lds -o $@ decompress.o LzmaDecode.o
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decompress.lds: decompress.lds.in Makefile
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@sed "$(SEDFLAGS)" < $< > $@
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mrproper: clean
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clean:
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rm -f loader.gz loader decompress *.lds *.o *.image
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