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## Copyright (C) 2005 David Decotigny
##
## This program is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License
## as published by the Free Software Foundation; either version 2
## of the License, or (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
## USA.
CC=gcc
AR=ar
OBJCOPY=objcopy
CFLAGS = -Wall -nostdinc -ffreestanding -I. -I.. -m32 -fno-asynchronous-unwind-tables -fno-stack-protector
LIBGCC := $(shell $(CC) -print-libgcc-file-name -m32) # To benefit from FP/64bits artihm.
LDFLAGS = -Wl,--warn-common -nostdlib -Wl,-Tldscript.lds -m32 -fno-asynchronous-unwind-tables
# Main target
all: userprogs.kimg
-include .mkvars
PROGS := myprog1 myprog2 myprog3 myprog4 myprog5 myprog6
# Build dependencies of the programs
$(PROGS) : % : %.o crt.o libc.a
PWD := $(shell pwd)
# Programs generation
$(PROGS):
$(CC) -static $(LDFLAGS) -o $@ $^ $(LIBGCC)
# Generation of the libC
libc.a: libc.o string.o stdarg.o debug.o
# Create a program image to be integrated into the Kernel
userprogs.kimg: $(PROGS)
@echo "# Generating ELF images for inclusion into the kernel image: $@"
@echo "SECTIONS { .userprogs . : { " > .userprogs.lds
@i=0 ; \
for f in $^ ; do \
i=`expr $$i + 1` ; \
echo "extern char _begin_userprog$$i, _end_userprog$$i;" \
> .userprog$$i.c ; \
echo "char *_userprog"$$i"_entry[]" >> .userprog$$i.c ; \
echo " __attribute__((section(\".userprogs_table\")))" \
>> .userprog$$i.c ; \
echo " = { \"$$f\", &_begin_userprog$$i, &_end_userprog$$i };" \
>> .userprog$$i.c ; \
$(CC) $(CFLAGS) -c .userprog$$i.c -o .userprog$$i.o ; \
$(OBJCOPY) --add-section .userprog$$i=$$f .userprog$$i.o \
.userprog$$i.kimg ; \
echo " . = ALIGN(4096);" >> .userprogs.lds ; \
echo " _begin_userprog$$i = .;" >> .userprogs.lds ; \
echo " .userprog$$i.kimg(.userprog$$i);" >> .userprogs.lds ; \
echo " _end_userprog$$i = .;" >> .userprogs.lds ; \
echo " .userprog$$i.kimg(.rodata); .userprog$$i.kimg(.data);" \
>> .userprogs.lds ; \
done
@echo " _userprogs_table = .; *(.userprogs_table) ; LONG(0);" \
>> .userprogs.lds
@echo "} /DISCARD/ : { *(.text) *(.data) *(.bss) } }" \
>> .userprogs.lds
@$(LD) -r -o $@ -T.userprogs.lds -m elf_i386
# Create libraries from object files
%.a:
$(AR) rcv $@ $^
# Create objects from C source code
%.o: %.c
$(CC) -I$(PWD) -c $< $(CFLAGS) -o $@
# Create objects from assembler (.S) source code
%.o: %.S
$(CC) -I$(PWD) -c $< $(CFLAGS) -DASM_SOURCE=1 -o $@
# Clean directory
clean:
$(RM) *.o *.a *~ $(PROGS) *.kimg
$(RM) .userprog*