diff options
Diffstat (limited to 'sos-code-article6.5/userland')
| -rw-r--r-- | sos-code-article6.5/userland/Makefile | 82 | ||||
| -rw-r--r-- | sos-code-article6.5/userland/ldscript.lds | 74 |
2 files changed, 156 insertions, 0 deletions
diff --git a/sos-code-article6.5/userland/Makefile b/sos-code-article6.5/userland/Makefile new file mode 100644 index 0000000..35fd0e3 --- /dev/null +++ b/sos-code-article6.5/userland/Makefile @@ -0,0 +1,82 @@ +## 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 +CFLAGS = -Wall -nostdinc -ffreestanding -I. -I.. +LDFLAGS = -Wl,--warn-common -nostdlib -Wl,-Tldscript.lds + +# Main target +all: userprogs.kimg + +-include .mkvars + + +PWD := $(shell pwd) + +# Programs generation +$(PROGS): + $(CC) -static $(LDFLAGS) -o $@ $^ + +# Generation of the libC +libc.a: libc.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 { .rodata . : { " > .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$$i.kimg ; \ + echo " _begin_userprog$$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 + +# 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* diff --git a/sos-code-article6.5/userland/ldscript.lds b/sos-code-article6.5/userland/ldscript.lds new file mode 100644 index 0000000..b0ee954 --- /dev/null +++ b/sos-code-article6.5/userland/ldscript.lds @@ -0,0 +1,74 @@ +/* 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. +*/ + +/* We generate binary in the ELF format */ +OUTPUT_FORMAT("elf32-i386","elf32-i386","elf32-i386"); + +/* The entry point of the program is _start (defined in crt.c) */ +ENTRY(_start) + +/* The architecture is i386 */ +OUTPUT_ARCH("i386") + +SECTIONS +{ + /* our program is loaded at 2G */ + . = 0x80000000; + + /* Beginning of the text section */ + .text : + { + /* This section includes the code */ + *(.text*) + /* Defines the 'etext' and '_etext' at the end */ + PROVIDE(etext = .); + PROVIDE(_etext = .); + } + + /* Beginning of the data section */ + .data . : + { *(.data*) + PROVIDE(edata = .); + PROVIDE(_edata = .); + } + + /* Beginning of the read-only data section */ + .rodata . : + { *(.rodata*) + PROVIDE(erodata = .); + PROVIDE(_erodata = .); + } + + /* Beginning of the BSS section (global uninitialized data) */ + .bss SIZEOF(.rodata) + ADDR(.rodata) : + { *(.bss) + *(COMMON) + PROVIDE(ebss = .); + PROVIDE(_ebss = .); + } + + /* We don't care of the note, indent, comment, etc.. sections + generated by gcc */ + /DISCARD/ :{ + *(.note*) + *(.indent) + *(.comment) + *(.stab) + *(.stabstr) + } +} |