From 1a763131bd3c84cd87e7b508f53b11e21bf81863 Mon Sep 17 00:00:00 2001 From: rahnds Date: Sat, 21 Dec 1996 20:53:48 +0000 Subject: [PATCH] Check-in of powerpc csu support. NOTE: This will not work until the other pieces are checked in. This is primarily the NetBSD powerpc port, with modifications to support ELF. A change needs to be made to one of the bsd.*.mk files to support DESTDIR compilation with the crtbegin and crtend files. --- lib/csu/powerpc/Makefile | 38 ++++++++++++ lib/csu/powerpc/crt0.s | 64 ++++++++++++++++++++ lib/csu/powerpc/crtbegin.c | 116 +++++++++++++++++++++++++++++++++++++ lib/csu/powerpc/crtend.s | 8 +++ 4 files changed, 226 insertions(+) create mode 100644 lib/csu/powerpc/Makefile create mode 100644 lib/csu/powerpc/crt0.s create mode 100644 lib/csu/powerpc/crtbegin.c create mode 100644 lib/csu/powerpc/crtend.s diff --git a/lib/csu/powerpc/Makefile b/lib/csu/powerpc/Makefile new file mode 100644 index 00000000000..b845845f002 --- /dev/null +++ b/lib/csu/powerpc/Makefile @@ -0,0 +1,38 @@ +# from: @(#)Makefile 8.1 (Berkeley) 6/1/93 +# $Id: Makefile,v 1.1.1.1 1996/12/21 20:53:48 rahnds Exp $ + +CFLAGS= -DLIBC_SCCS +OBJS= crt0.o gcrt0.o crtbegin.o crtend.o +CLEANFILES+= core a.out + +all: ${OBJS} + +crt0.o: crt0.s + ${CPP} -DCRT0 ${.ALLSRC} | ${AS} -o $@ + @${LD} -x -r ${.TARGET} + @mv a.out ${.TARGET} + +gcrt0.o: crt0.s + ${CPP} -DMCRT0 ${.ALLSRC} | ${AS} -o $@ + @${LD} -x -r ${.TARGET} + @mv a.out ${.TARGET} + +crtbegin.o: crtbegin.c + @echo ${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET} + @${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}.o + @${LD} -x -r -o ${.TARGET} ${.TARGET}.o + @rm -f ${.TARGET}.o + +crtend.o: crtend.s + @echo ${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET} + @${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}.o + @${LD} -x -r -o ${.TARGET} ${.TARGET}.o + @rm -f ${.TARGET}.o + +install: + install ${COPY} -o ${BINOWN} -g ${BINGRP} -m 444 ${OBJS} \ + ${DESTDIR}/usr/lib + +depend lint tags: + +.include diff --git a/lib/csu/powerpc/crt0.s b/lib/csu/powerpc/crt0.s new file mode 100644 index 00000000000..964a05f3861 --- /dev/null +++ b/lib/csu/powerpc/crt0.s @@ -0,0 +1,64 @@ + + + .data 1 + .comm environ, 4 + .globl __progname +__progname: + .long L1 +L1: .long 0 # null string plus padding + + + + .text + .globl start +start: + .globl _start +_start: + + # squirrel away the arguments for main + mr 13, 3 + mr 14, 4 + mr 15, 5 + mr 16, 6 + + # determine the program name (__progname) + lwz 28, 0(4) # r28 = argv[0] (program name) + cmpwi 28, 0 # argv[0] == NULL? + beq call_main # yep forget setup of progname + mr 3, 28 # r3 = argv[0] + li 4, '/' # r4 = '/' + .extern strrchr + bl strrchr # strrchr(argv[0], '/') + cmpwi 3, 0 # == 0? + beq no_slash_found # not found, use argv[0] still in r28 + addi 28, 3, 1 # was found, point at char after '/' +no_slash_found: + # store the address of the basename found in argv[0] + lis 31, __progname@HA + stw 28, __progname@L(31) + + lis 26, environ@HA + stw 5, environ@L(26) + +call_main: + .globl __init + bl __init + # recover those saved registers + mr 3, 13 + mr 4, 14 + mr 5, 15 + mr 6, 16 + + bl main + .extern exit + mr 13, 3 + bl __fini + mr 3, 13 + bl exit + + .globl __main +__main: + .globl __eabi +__eabi: + blr + diff --git a/lib/csu/powerpc/crtbegin.c b/lib/csu/powerpc/crtbegin.c new file mode 100644 index 00000000000..ff818f2ef61 --- /dev/null +++ b/lib/csu/powerpc/crtbegin.c @@ -0,0 +1,116 @@ +/* $OpenBSD: crtbegin.c,v 1.1.1.1 1996/12/21 20:53:48 rahnds Exp $ */ +/* $NetBSD: crtbegin.c,v 1.1 1996/09/12 16:59:03 cgd Exp $ */ + +/* + * Copyright (c) 1993 Paul Kranenburg + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Paul Kranenburg. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * 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. + */ + +#ifndef ECOFF_COMPAT + +/* + * XXX EVENTUALLY SHOULD BE MERGED BACK WITH c++rt0.c + */ + +/* + * Run-time module for GNU C++ compiled shared libraries. + * + * The linker constructs the following arrays of pointers to global + * constructors and destructors. The first element contains the + * number of pointers in each. + * The tables are also null-terminated. + + */ +#include + +/* XXX hack */ +__asm__(" +.section .ctors,\"aw\" + .long -1 +.section .dtors,\"aw\" + .long -1 +"); + +void (*__CTOR_LIST__[0]) __P((void)); +void (*__DTOR_LIST__[0]) __P((void)); + +static void __dtors __P((void)); +static void __ctors __P((void)); + +static void +__dtors() +{ + unsigned long i = (unsigned long) __DTOR_LIST__[0]; + void (**p)(void); + + if (i == -1) { + for (i = 1; __DTOR_LIST__[i] != NULL; i++) + ; + i--; + } + p = __DTOR_LIST__ + i; + while (i--) + (**p--)(); +} + +static void +__ctors() +{ + void (**p)(void) = __CTOR_LIST__ + 1; + + while (*p) + (**p++)(); +} + +void +__init() +{ + static int initialized = 0; + + /* + * Call global constructors. + * Arrange to call global destructors at exit. + */ + if (!initialized) { + initialized = 1; + __ctors(); + } + atexit(__dtors); + +} + +void +__fini() +{ + /* + * Call global destructors. + */ + __dtors(); +} + +#endif /* !ECOFF_COMPAT */ diff --git a/lib/csu/powerpc/crtend.s b/lib/csu/powerpc/crtend.s new file mode 100644 index 00000000000..e7d0ca90a9b --- /dev/null +++ b/lib/csu/powerpc/crtend.s @@ -0,0 +1,8 @@ +/* + * Emperically created. + * this is the NULL terminator for the ctors and dtors lists. + */ +.section .ctors,"aw" + .long 0 +.section .dtors,"aw" + .long 0 -- 2.20.1