Import C startup files for ELF support.

Submitted by:	John Polstra <jdp@polstra.com>

6 files changed, 263 insertions, 0 deletions

diff --git a/lib/csu/i386-elf/Makefile b/lib/csu/i386-elf/Makefile
new file mode 100644
index 0000000..a4c72b3
--- /dev/null
+++ b/lib/csu/i386-elf/Makefile
@@ -0,0 +1,24 @@
+#
+#	$Id: Makefile,v 1.6 1996/04/12 02:24:34 jdp Exp $
+#
+
+SRCS=		crt1.c crtbegin.c crtend.c crti.S crtn.S
+OBJS=		${SRCS:N*.h:R:S/$/.o/g}
+SOBJS=		crtbegin.so crtend.so
+CFLAGS+=	-elf
+CFLAGS+=	-Wall -Wno-unused
+LDFLAGS+=	-elf
+NOMAN=		true
+NOPIC=		true
+NOPROFILE=	true
+INTERNALLIB=	true
+
+all: ${OBJS} ${SOBJS}
+
+realinstall:
+.for file in ${OBJS} ${SOBJS}
+	${INSTALL} ${COPY} -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} \
+	    ${file} ${DESTDIR}${LIBDIR}/${file:S/.so$/S.o/}
+.endfor
+
+.include <bsd.lib.mk>
diff --git a/lib/csu/i386-elf/crt1.c b/lib/csu/i386-elf/crt1.c
new file mode 100644
index 0000000..d89d501
--- /dev/null
+++ b/lib/csu/i386-elf/crt1.c
@@ -0,0 +1,77 @@
+/*-
+ * 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.
+ *
+ *      $Id: crt1.c,v 1.4 1996/04/12 02:24:35 jdp Exp $
+ */
+
+#ifndef __GNUC__
+#error "GCC is needed to compile this file"
+#endif
+
+#include <stdlib.h>
+
+typedef void (*fptr)(void);
+
+extern void _fini(void);
+extern void _init(void);
+extern int main(int, char **, char **);
+
+extern int _DYNAMIC;
+#pragma weak _DYNAMIC
+
+#ifdef __i386__
+#define get_rtld_cleanup()				\
+    ({ fptr __value;					\
+       __asm__("movl %%edx,%0" : "=rm"(__value));	\
+       __value; })
+#else
+#error "This file only supports the i386 architecture"
+#endif
+
+char **environ;
+char *__progname = "";
+
+void
+_start(char *arguments, ...)
+{
+    fptr rtld_cleanup;
+    int argc;
+    char **argv;
+    char **env;
+
+    rtld_cleanup = get_rtld_cleanup();
+    argv = &arguments;
+    argc = * (int *) (argv - 1);
+    env = argv + argc + 1;
+    environ = env;
+    if(argc > 0)
+	__progname = argv[0];
+
+    if(&_DYNAMIC != 0)
+	atexit(rtld_cleanup);
+
+    atexit(_fini);
+    _init();
+    exit( main(argc, argv, env) );
+}
diff --git a/lib/csu/i386-elf/crtbegin.c b/lib/csu/i386-elf/crtbegin.c
new file mode 100644
index 0000000..9970d85
--- /dev/null
+++ b/lib/csu/i386-elf/crtbegin.c
@@ -0,0 +1,61 @@
+/*-
+ * 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.
+ *
+ *      $Id: crtbegin.c,v 1.3 1996/04/12 02:24:35 jdp Exp $
+ */
+
+typedef void (*fptr)(void);
+
+static fptr ctor_list[1] __attribute__((section(".ctors"))) = { (fptr) -1 };
+static fptr dtor_list[1] __attribute__((section(".dtors"))) = { (fptr) -1 };
+
+static void
+do_ctors(void)
+{
+    fptr *fpp;
+
+    for(fpp = ctor_list + 1;  *fpp != 0;  ++fpp)
+	(**fpp)();
+}
+
+static void
+do_dtors(void)
+{
+    fptr *fpp;
+
+    for(fpp = dtor_list + 1;  *fpp != 0;  ++fpp)
+	;
+    while(--fpp > dtor_list)
+	(**fpp)();
+}
+
+static void
+function_skeleton(void)
+{
+    __asm__(".section .init,\"ax\",@progbits");
+    do_ctors();
+    __asm__(".section .fini,\"ax\",@progbits");
+    do_dtors();
+    __asm__(".text");
+}
diff --git a/lib/csu/i386-elf/crtend.c b/lib/csu/i386-elf/crtend.c
new file mode 100644
index 0000000..e1f2293
--- /dev/null
+++ b/lib/csu/i386-elf/crtend.c
@@ -0,0 +1,31 @@
+/*-
+ * 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.
+ *
+ *      $Id: crtend.c,v 1.3 1996/04/12 02:24:36 jdp Exp $
+ */
+
+typedef void (*fptr)(void);
+
+static fptr ctor_end[1] __attribute__((section(".ctors"))) = { 0 };
+static fptr dtor_end[1] __attribute__((section(".dtors"))) = { 0 };
diff --git a/lib/csu/i386-elf/crti.S b/lib/csu/i386-elf/crti.S
new file mode 100644
index 0000000..94e947d
--- /dev/null
+++ b/lib/csu/i386-elf/crti.S
@@ -0,0 +1,38 @@
+/*-
+ * 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.
+ *
+ *      $Id: crti.S,v 1.2 1997/08/28 00:27:08 jdp Exp $
+ */
+
+	.section .init,"ax",@progbits
+	.align	4
+	.globl	_init
+	.type	_init,@function
+_init:
+
+	.section .fini,"ax",@progbits
+	.align	4
+	.globl	_fini
+	.type	_fini,@function
+_fini:
diff --git a/lib/csu/i386-elf/crtn.S b/lib/csu/i386-elf/crtn.S
new file mode 100644
index 0000000..8f280b2
--- /dev/null
+++ b/lib/csu/i386-elf/crtn.S
@@ -0,0 +1,32 @@
+/*-
+ * 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.
+ *
+ *      $Id: crtn.S,v 1.2 1997/08/28 00:27:09 jdp Exp $
+ */
+
+	.section .init,"ax",@progbits
+	ret
+
+	.section .fini,"ax",@progbits
+	ret