90 lines
3.6 KiB
Makefile
90 lines
3.6 KiB
Makefile
## Copyright (C) 2005 David Decotigny
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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
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## as published by the Free Software Foundation; either version 2
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## of 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, MA 02111-1307,
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## USA.
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CC=gcc
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AR=ar
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OBJCOPY=objcopy
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CFLAGS = -Wall -nostdinc -ffreestanding -I. -I.. -m32 -fno-asynchronous-unwind-tables
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LIBGCC := $(shell $(CC) -print-libgcc-file-name -m32) # To benefit from FP/64bits artihm.
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LDFLAGS = -Wl,--warn-common -nostdlib -Wl,-Tldscript.lds -m32 -fno-asynchronous-unwind-tables
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# Main target
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all: userprogs.kimg
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-include .mkvars
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PROGS := myprog1 myprog2 myprog3 myprog4 myprog5 myprog6
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# Build dependencies of the programs
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$(PROGS) : % : %.o crt.o libc.a
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PWD := $(shell pwd)
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# Programs generation
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$(PROGS):
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$(CC) -static $(LDFLAGS) -o $@ $^ $(LIBGCC)
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# Generation of the libC
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libc.a: libc.o string.o stdarg.o debug.o
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# Create a program image to be integrated into the Kernel
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userprogs.kimg: $(PROGS)
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@echo "# Generating ELF images for inclusion into the kernel image: $@"
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@echo "SECTIONS { .userprogs . : { " > .userprogs.lds
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@i=0 ; \
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for f in $^ ; do \
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i=`expr $$i + 1` ; \
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echo "extern char _begin_userprog$$i, _end_userprog$$i;" \
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> .userprog$$i.c ; \
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echo "char *_userprog"$$i"_entry[]" >> .userprog$$i.c ; \
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echo " __attribute__((section(\".userprogs_table\")))" \
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>> .userprog$$i.c ; \
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echo " = { \"$$f\", &_begin_userprog$$i, &_end_userprog$$i };" \
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>> .userprog$$i.c ; \
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$(CC) $(CFLAGS) -c .userprog$$i.c -o .userprog$$i.o ; \
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$(OBJCOPY) --add-section .userprog$$i=$$f .userprog$$i.o \
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.userprog$$i.kimg ; \
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echo " . = ALIGN(4096);" >> .userprogs.lds ; \
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echo " _begin_userprog$$i = .;" >> .userprogs.lds ; \
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echo " .userprog$$i.kimg(.userprog$$i);" >> .userprogs.lds ; \
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echo " _end_userprog$$i = .;" >> .userprogs.lds ; \
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echo " .userprog$$i.kimg(.rodata); .userprog$$i.kimg(.data);" \
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>> .userprogs.lds ; \
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done
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@echo " _userprogs_table = .; *(.userprogs_table) ; LONG(0);" \
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>> .userprogs.lds
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@echo "} /DISCARD/ : { *(.text) *(.data) *(.bss) } }" \
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>> .userprogs.lds
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@$(LD) -r -o $@ -T.userprogs.lds -m elf_i386
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# Create libraries from object files
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%.a:
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$(AR) rcv $@ $^
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# Create objects from C source code
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%.o: %.c
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$(CC) -I$(PWD) -c $< $(CFLAGS) -o $@
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# Create objects from assembler (.S) source code
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%.o: %.S
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$(CC) -I$(PWD) -c $< $(CFLAGS) -DASM_SOURCE=1 -o $@
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# Clean directory
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clean:
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$(RM) *.o *.a *~ $(PROGS) *.kimg
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$(RM) .userprog*
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