From 5a744a47132c3f14b0fa61b14f91cdda8cb2b065 Mon Sep 17 00:00:00 2001 From: jdp Date: Sat, 7 Mar 1998 20:27:11 +0000 Subject: Import C startup files for ELF support. Submitted by: John Polstra --- lib/csu/i386-elf/Makefile | 24 ++++++++++++++ lib/csu/i386-elf/crt1.c | 77 +++++++++++++++++++++++++++++++++++++++++++++ lib/csu/i386-elf/crtbegin.c | 61 +++++++++++++++++++++++++++++++++++ lib/csu/i386-elf/crtend.c | 31 ++++++++++++++++++ lib/csu/i386-elf/crti.S | 38 ++++++++++++++++++++++ lib/csu/i386-elf/crtn.S | 32 +++++++++++++++++++ 6 files changed, 263 insertions(+) create mode 100644 lib/csu/i386-elf/Makefile create mode 100644 lib/csu/i386-elf/crt1.c create mode 100644 lib/csu/i386-elf/crtbegin.c create mode 100644 lib/csu/i386-elf/crtend.c create mode 100644 lib/csu/i386-elf/crti.S create mode 100644 lib/csu/i386-elf/crtn.S (limited to 'lib/csu') 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 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 + +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 -- cgit v1.1