csu/build support for ELF

lib/Makefile

@@ -1,6 +1,6 @@
 .include <bsd.own.mk>
 
-SUBDIR= csu libc libcurses libdriver libnetdriver libend libedit libm libsys \
+SUBDIR= csu libc libcurses libdriver libnetdriver libedit libm libsys \
 	libtimers libutil libbz2 libl libhgfs libz libfetch libarchive \
 	libvtreefs libaudiodriver libmthread libexec
 
@@ -8,6 +8,10 @@ SUBDIR= csu libc libcurses libdriver libnetdriver libend libedit libm libsys \
 SUBDIR+= ack/libd ack/libe ack/libfp ack/liby
 .endif
 
+.if ${OBJECT_FMT} == "a.out"
+SUBDIR+= libend
+.endif
+
 .include <bsd.subdir.mk>
 
 build_ack:
@@ -19,8 +23,14 @@ build_gnu:
 build_clang:
 	sh clang_build.sh obj depend all install
 
+build_elf:
+	sh elf_build.sh obj depend all install
+
 clean_ack:
 	sh ack_build.sh clean
 
 clean_gnu:
 	sh gnu_build.sh clean
+
+clean_elf:
+	sh elf_build.sh clean

lib/csu/Makefile

@@ -1,14 +1,9 @@
 .include <bsd.own.mk>
 
-.PATH:	${.CURDIR}/${ARCH}
+.if ${OBJECT_FMT} == "a.out"
+SUBDIR=${ARCH}-aout
+.elif ${OBJECT_FMT} == "ELF"
+SUBDIR=${ARCH}-elf
+.endif
 
-SRCS=	crtso.S
-OBJS=	crtso.o
-
-realall: ${OBJS}
-
-FILES=${OBJS}
-FILESDIR=${LIBDIR}
-CLEANFILES=${OBJS}
-
-.include <bsd.prog.mk>
+.include <bsd.subdir.mk>

lib/csu/i386-aout/Makefile

@@ -0,0 +1,12 @@
+.include <bsd.own.mk>
+
+SRCS=	crtso.S
+OBJS=	crtso.o
+
+realall: ${OBJS}
+
+FILES=${OBJS}
+FILESDIR=${LIBDIR}
+CLEANFILES=${OBJS}
+
+.include <bsd.prog.mk>

lib/csu/i386-elf/Makefile

@@ -0,0 +1,29 @@
+.include <bsd.own.mk>
+
+SRCS=		crti.S crtn.S
+OBJS=		${SRCS:N*.h:R:S/$/.o/g} gcrt1.o crt1.o Scrt1.o
+
+realall: ${OBJS}
+
+FILES=${OBJS}
+FILESDIR=${LIBDIR}
+CLEANFILES=${OBJS} crt1_c.o crt1_s.o gcrt1_c.o Scrt1_c.o
+
+gcrt1_c.o: crt1_c.c
+	${CC} ${CFLAGS} -DGCRT -c -o gcrt1_c.o ${.CURDIR}/crt1_c.c
+
+gcrt1.o: gcrt1_c.o crt1_s.o
+	${LD} ${LDFLAGS} -o gcrt1.o -r crt1_s.o gcrt1_c.o
+
+crt1.o:	crt1_c.o crt1_s.o
+	${LD} ${LDFLAGS} -o crt1.o -r crt1_s.o crt1_c.o
+	${OBJCOPY} --localize-symbol _start1 crt1.o
+
+Scrt1_c.o:	crt1_c.c
+	${CC} ${CFLAGS} -fPIC -DPIC -c -o Scrt1_c.o ${.CURDIR}/crt1_c.c
+
+Scrt1.o: Scrt1_c.o crt1_s.o
+	${LD} ${LDFLAGS} -o Scrt1.o -r crt1_s.o Scrt1_c.o
+	${OBJCOPY} --localize-symbol _start1 Scrt1.o
+
+.include <bsd.prog.mk>

lib/csu/i386-elf/crt1_c.c

@@ -0,0 +1,94 @@
+/* LINTLIBRARY */
+/*-
+ * Copyright 1996-1998 John D. Polstra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef lint
+#ifndef __GNUC__
+#error "GCC is needed to compile this file"
+#endif
+#endif /* lint */
+
+#include <stdlib.h>
+
+extern int _DYNAMIC;
+#pragma weak _DYNAMIC
+
+typedef void (*fptr)(void);
+
+extern void _fini(void);
+extern void _init(void);
+extern int main(int, char **, char **);
+extern void _start(char *, ...);
+
+#ifdef GCRT
+extern void _mcleanup(void);
+extern void monstartup(void *, void *);
+extern int eprol;
+extern int etext;
+#endif
+
+char **environ;
+const char *__progname = "";
+
+__dead void _start1(fptr, int, char *[]);
+
+/* The entry function, C part. */
+__dead void
+_start1(fptr cleanup, int argc, char *argv[])
+{
+	char **env;
+	const char *s;
+
+	env = argv + argc + 1;
+	environ = env;
+	if (argc > 0 && argv[0] != NULL) {
+		__progname = argv[0];
+		for (s = __progname; *s != '\0'; s++)
+			if (*s == '/')
+				__progname = s + 1;
+	}
+
+#if 0
+	if (&_DYNAMIC != NULL)
+		atexit(cleanup);
+	else
+		_init_tls();
+#endif
+
+#ifdef GCRT
+	atexit(_mcleanup);
+#endif
+	atexit(_fini);
+#ifdef GCRT
+	monstartup(&eprol, &etext);
+__asm__("eprol:");
+#endif
+	_init();
+	exit( main(argc, argv, env) );
+}
+
+__asm(".hidden	_start1");

lib/csu/i386-elf/crt1_s.S

@@ -0,0 +1,51 @@
+/*-
+ * Copyright 2009 Konstantin Belousov.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+
+	.text
+	.align	4
+	.globl	_start
+	.type	_start, @function
+_start:
+	.cfi_startproc
+	xorl	%ebp,%ebp
+	pushl	%ebp
+	.cfi_def_cfa_offset 4
+	movl	%esp,%ebp
+	.cfi_offset %ebp,-8
+	.cfi_def_cfa_register %ebp
+	andl	$0xfffffff0,%esp # align stack
+	leal	8(%ebp),%eax
+	pushl	%eax		# argv
+	pushl	4(%ebp)		# argc
+	pushl	%edx		# rtld cleanup
+	call	_start1
+	int3
+	.cfi_endproc
+	.size	_start, . - _start
+
+	.ident	"$MINIX$"

lib/csu/i386-elf/crti.S

@@ -0,0 +1,41 @@
+/*-
+ * Copyright 1996, 1997, 1998, 2000 John D. Polstra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+	.section .init,"ax",@progbits
+	.align	4
+	.globl	_init
+	.type	_init,@function
+_init:
+	sub	$12,%esp	/* re-align stack pointer */
+
+	.section .fini,"ax",@progbits
+	.align	4
+	.globl	_fini
+	.type	_fini,@function
+_fini:
+	sub	$12,%esp	/* re-align stack pointer */
+
+	.section .rodata
+.ascii "$MINIX$\0"

lib/csu/i386-elf/crtn.S

@@ -0,0 +1,35 @@
+/*-
+ * Copyright 1996, 1997, 1998, 2000 John D. Polstra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+	.section .init,"ax",@progbits
+	add	$12,%esp
+	ret
+
+	.section .fini,"ax",@progbits
+	add	$12,%esp
+	ret
+
+	.section .rodata
+.ascii "$MINIX$\0"

lib/elf_build.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+export CC=i386-pc-minix3-gcc
+export COMPILER_TYPE=gnu
+export MAKEOBJDIR=obj-elf
+export PATH=$PATH:/usr/gnu_cross/bin
+
+make $@

lib/libc/arch/i386/rts/brksize.S

@@ -1,5 +1,13 @@
+#if defined(__ELF__)
+.globl _end
+.globl _brksize
+
+.data
+_brksize: .long _end
+#else
 .globl	__brksize
 .data
 .extern	endbss, __brksize
 __brksize:
 .long	endbss
+#endif