Added shared libs support from NetBSD.
This commit is contained in:
parent
90f2ed3a8f
commit
44d76bb777
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=698
@ -1,15 +1,16 @@
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# @(#)Makefile 5.6 (Berkeley) 5/22/91
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# from: @(#)Makefile 5.6 (Berkeley) 5/22/91
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# $Id: Makefile,v 1.9 1993/10/24 01:34:24 pk Exp $
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CFLAGS= -O -DLIBC_SCCS
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CFLAGS+= -DLIBC_SCCS #-DDYNAMIC
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OBJS= crt0.o gcrt0.o
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OBJS= crt0.o gcrt0.o
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CLEANFILES+= gmon.o moncrt0.o core a.out
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CLEANFILES+= gmon.o moncrt0.o core a.out
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all: ${OBJS}
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all: ${OBJS}
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crt0.o: crt0.c
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crt0.o: crt0.c
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${CC} ${CFLAGS} -c -DCRT0 ${.ALLSRC}
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${CC} ${CFLAGS} -c -DCRT0 ${.ALLSRC}
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${LD} -x -r ${.TARGET}
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# ${LD} -x -r ${.TARGET}
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mv a.out ${.TARGET}
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# mv a.out ${.TARGET}
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moncrt0.o: crt0.c
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moncrt0.o: crt0.c
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${CC} ${CFLAGS} -c -DMCRT0 ${.ALLSRC} -o ${.TARGET}
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${CC} ${CFLAGS} -c -DMCRT0 ${.ALLSRC} -o ${.TARGET}
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@ -20,11 +21,12 @@ gcrt0.o: moncrt0.o gmon.o
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${LD} -x -r -o ${.TARGET} moncrt0.o gmon.o
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${LD} -x -r -o ${.TARGET} moncrt0.o gmon.o
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gmon.o: gmon.c gmon.h
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gmon.o: gmon.c gmon.h
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${CC} -c ${DEFS} ${.IMPSRC}
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${CC} ${CFLAGS} -c ${.IMPSRC}
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${LD} -x -r ${.TARGET}
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${LD} -x -r ${.TARGET}
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mv a.out ${.TARGET}
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mv a.out ${.TARGET}
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install:
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install:
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install -d -o ${BINOWN} -g ${BINGRP} -m 0755 ${DESTDIR}/usr/lib
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install ${COPY} -o ${BINOWN} -g ${BINGRP} -m 444 ${OBJS} \
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install ${COPY} -o ${BINOWN} -g ${BINGRP} -m 444 ${OBJS} \
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${DESTDIR}/usr/lib
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${DESTDIR}/usr/lib
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@ -1,5 +1,5 @@
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/*-
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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* Copyright (c) 1993 Paul Kranenburg
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* All rights reserved.
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* All rights reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* Redistribution and use in source and binary forms, with or without
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@ -12,53 +12,170 @@
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* documentation and/or other materials provided with the distribution.
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* This product includes software developed by Paul Kranenburg.
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* California, Berkeley and its contributors.
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* 4. The name of the author may not be used to endorse or promote products
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* 4. Neither the name of the University nor the names of its contributors
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* derived from this software withough specific prior written permission
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* SUCH DAMAGE.
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*
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* $Id: crt0.c,v 1.7 1993/10/23 00:47:18 pk Exp $
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*/
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)crt0.c 5.7 (Berkeley) 7/3/91";
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static char sccsid[] = "%W% (Erasmus) %G%";
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#endif /* LIBC_SCCS and not lint */
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#endif /* LIBC_SCCS and not lint */
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extern void exit();
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int _callmain();
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/*
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#include <sys/param.h>
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* C start up routine.
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* Robert Henry, UCB, 20 Oct 81
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*
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* We make the following (true) assumption:
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* 1) The only register variable that we can trust is the frame pointer,
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* ebp, which points to the base of the kernel calling frame.
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*/
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#include <stddef.h>
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#ifdef DYNAMIC
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#include <stdlib.h>
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#include <sys/types.h>
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#include <string.h>
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#include <sys/syscall.h>
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#include <a.out.h>
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#ifndef N_GETMAGIC
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#define N_GETMAGIC(x) ((x).a_magic)
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#endif
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#ifndef N_BSSADDR
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#define N_BSSADDR(x) (N_DATADDR(x)+(x).a_data)
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#endif
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#include <sys/mman.h>
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#ifdef sun
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#define MAP_COPY MAP_PRIVATE
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#define MAP_FILE 0
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#define MAP_ANON 0
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#endif
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#include <link.h>
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char **environ = (char **)0;
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extern struct link_dynamic _DYNAMIC;
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static char empty[1];
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static void __do_dynamic_link ();
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char *__progname = empty;
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static char *_getenv();
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int errno = 0;
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static int _strncmp();
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#ifdef sparc
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static __call();
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#endif
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#ifdef sun
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#define LDSO "/usr/lib/ld.so"
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#endif
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#ifdef BSD
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#define LDSO "/usr/libexec/ld.so"
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#endif
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#endif /* DYNAMIC */
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static char *_strrchr();
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char **environ;
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#ifdef BSD
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extern unsigned char etext;
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extern unsigned char etext;
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extern unsigned char eprol asm ("eprol");
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extern unsigned char eprol asm ("eprol");
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extern start() asm("start");
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extern start() asm("start");
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extern mcount() asm ("mcount");
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extern mcount() asm ("mcount");
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int errno;
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static char empty[1];
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char *__progname = empty;
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#endif
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/*
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* We need these system calls, but can't use library stubs
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*/
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#define _exit(v) __syscall(SYS_exit, (v))
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#define open(name, f, m) __syscall(SYS_open, (name), (f), (m))
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#define close(fd) __syscall(SYS_close, (fd))
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#define read(fd, s, n) __syscall(SYS_read, (fd), (s), (n))
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#define write(fd, s, n) __syscall(SYS_write, (fd), (s), (n))
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#define dup(fd) __syscall(SYS_dup, (fd))
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#define dup2(fd, fdnew) __syscall(SYS_dup2, (fd), (fdnew))
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#ifdef sun
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#define mmap(addr, len, prot, flags, fd, off) \
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__syscall(SYS_mmap, (addr), (len), (prot), _MAP_NEW|(flags), (fd), (off))
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#else
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#define mmap(addr, len, prot, flags, fd, off) \
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__syscall(SYS_mmap, (addr), (len), (prot), (flags), (fd), (off))
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#endif
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#define _FATAL(str) \
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write(2, str, sizeof(str)), \
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_exit(1);
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#ifdef sparc
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asm (" .global start");
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asm (" .text");
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asm (" start:");
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/* Set up `argc', `argv', and `envp' into local registers (from GNU Emacs). */
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asm (" mov 0, %fp");
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asm (" ld [%sp + 64], %l0"); /* argc */
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asm (" add %sp, 68, %l1"); /* argv */
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asm (" sll %l0, 2, %l2"); /**/
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asm (" add %l2, 4, %l2"); /* envp = argv + (argc << 2) + 4 */
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asm (" add %l1, %l2, %l2"); /**/
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asm (" sethi %hi(_environ), %l3");
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asm (" st %l2, [%l3+%lo(_environ)]"); /* *environ = l2 */
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/* Finish diddling with stack. */
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asm (" andn %sp, 7, %sp");
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asm (" sub %sp, 24, %sp");
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#ifdef DYNAMIC
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/* Resolve symbols in dynamic libraries */
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asm (" call ___do_dynamic_link");
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asm (" nop");
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#endif
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/* From here, all symbols should have been resolved, so we can use libc */
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#ifdef MCRT0
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asm (" call ___do_mcrt");
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asm (" nop");
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#endif
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/* Stay Sun compatible (currently (SunOS 4.1.2) does nothing on sun4) */
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asm (" call start_float");
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asm (" nop");
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/* Move `argc', `argv', and `envp' from locals to parameters for `main'. */
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asm (" mov %l0,%o0");
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asm (" mov %l1,%o1");
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asm ("__callmain:"); /* Defined for the benefit of debuggers */
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asm (" call _main");
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asm (" mov %l2,%o2");
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asm (" call _exit");
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asm (" nop");
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#ifdef MCRT0
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static void
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__do_mcrt ()
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{
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extern unsigned char eprol, etext;
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extern void _mcleanup();
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on_exit(_mcleanup, 0);
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monstartup(&eprol, &etext);
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return;
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}
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#endif
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#endif /* sparc */
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#ifdef i386
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start()
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start()
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{
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{
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struct kframe {
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struct kframe {
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@ -74,44 +191,269 @@ start()
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register char **targv;
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register char **targv;
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register char **argv;
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register char **argv;
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extern void _mcleanup();
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extern void _mcleanup();
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#ifdef DYNAMIC
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volatile caddr_t x;
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#endif
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#ifdef lint
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#ifdef lint
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kfp = 0;
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kfp = 0;
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initcode = initcode = 0;
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initcode = initcode = 0;
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#else not lint
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#else /* not lint */
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/* just above the saved frame pointer */
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/* just above the saved frame pointer */
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asm ("lea 4(%%ebp), %0" : "=r" (kfp) );
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asm ("lea 4(%%ebp), %0" : "=r" (kfp) );
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#endif not lint
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#endif /* not lint */
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for (argv = targv = &kfp->kargv[0]; *targv++; /* void */)
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for (argv = targv = &kfp->kargv[0]; *targv++; /* void */)
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/* void */ ;
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/* void */ ;
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if (targv >= (char **)(*argv))
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if (targv >= (char **)(*argv))
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--targv;
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--targv;
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environ = targv;
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environ = targv;
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#ifdef DYNAMIC
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#ifdef stupid_gcc
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if (&_DYNAMIC)
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__do_dynamic_link();
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#else
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x = (caddr_t)&_DYNAMIC;
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if (x)
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__do_dynamic_link();
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#endif
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#endif /* DYNAMIC */
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asm("eprol:");
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asm("eprol:");
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#ifdef MCRT0
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#ifdef MCRT0
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atexit(_mcleanup);
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atexit(_mcleanup);
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monstartup(&eprol, &etext);
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monstartup(&eprol, &etext);
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#endif MCRT0
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#endif MCRT0
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errno = 0;
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#if 0
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if (argv[0])
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errno = 0;
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if ((__progname = strrchr(argv[0], '/')) == NULL)
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#endif
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__progname = argv[0];
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if (argv[0])
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else
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if ((__progname = _strrchr(argv[0], '/')) == NULL)
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++__progname;
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__progname = argv[0];
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else
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++__progname;
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asm ("__callmain:"); /* Defined for the benefit of debuggers */
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exit(main(kfp->kargc, argv, environ));
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exit(main(kfp->kargc, argv, environ));
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}
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}
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#endif /* i386 */
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#ifdef CRT0
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#ifdef DYNAMIC
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/*
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static void
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* null mcount and moncontrol,
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__do_dynamic_link ()
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* just in case some routine is compiled for profiling
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*/
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moncontrol(val)
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int val;
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{
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{
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struct crt_ldso crt;
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struct exec hdr;
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char *ldso;
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int dupzfd;
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void (*entry)();
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/* ld(1) convention: if DYNAMIC = 0 then statically linked */
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if (&_DYNAMIC == (struct link_dynamic *)0)
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return;
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/* Provision for alternate ld.so - security risk! */
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if (!(ldso = _getenv("LDSO")))
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ldso = LDSO;
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crt.crt_ldfd = open(ldso, 0, 0);
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if (crt.crt_ldfd == -1) {
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_FATAL("No ld.so\n");
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}
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/* Read LDSO exec header */
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if (read(crt.crt_ldfd, &hdr, sizeof hdr) < sizeof hdr) {
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_FATAL("Failure reading ld.so\n");
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}
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if (N_GETMAGIC(hdr) != ZMAGIC) {
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_FATAL("Bad magic: ld.so\n");
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}
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#ifdef sun
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/* Get bucket of zeroes */
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crt.crt_dzfd = open("/dev/zero", 0, 0);
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if (crt.crt_dzfd == -1) {
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_FATAL("No /dev/zero\n");
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}
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#endif
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#ifdef BSD
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/* We use MAP_ANON */
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crt.crt_dzfd = -1;
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#endif
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#if defined(sun) && defined(DUPZFD)
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if ((dupzfd = dup(crt.crt_dzfd)) < 0) {
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_FATAL("Cannot dup /dev/zero\n");
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}
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#endif
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/* Map in ld.so */
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crt.crt_ba = mmap(0, hdr.a_text+hdr.a_data+hdr.a_bss,
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PROT_READ|PROT_EXEC,
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MAP_FILE|MAP_COPY,
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crt.crt_ldfd, N_TXTOFF(hdr));
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if (crt.crt_ba == -1) {
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_FATAL("Cannot map ld.so\n");
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}
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#ifdef BSD
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/* !!!
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* This is gross, ld.so is a ZMAGIC a.out, but has `sizeof(hdr)' for
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* an entry point and not at PAGSIZ as the N_*ADDR macros assume.
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*/
|
||||||
|
#undef N_DATADDR
|
||||||
|
#undef N_BSSADDR
|
||||||
|
#define N_DATADDR(x) ((x).a_text)
|
||||||
|
#define N_BSSADDR(x) ((x).a_text + (x).a_data)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Map in data segment of ld.so writable */
|
||||||
|
if (mmap(crt.crt_ba+N_DATADDR(hdr), hdr.a_data,
|
||||||
|
PROT_READ|PROT_EXEC|PROT_WRITE,
|
||||||
|
MAP_FIXED|MAP_FILE|MAP_COPY,
|
||||||
|
crt.crt_ldfd, N_DATOFF(hdr)) == -1) {
|
||||||
|
_FATAL("Cannot map ld.so\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Map bss segment of ld.so zero */
|
||||||
|
if (hdr.a_bss && mmap(crt.crt_ba+N_BSSADDR(hdr), hdr.a_bss,
|
||||||
|
PROT_READ|PROT_EXEC|PROT_WRITE,
|
||||||
|
MAP_FIXED|MAP_ANON|MAP_COPY,
|
||||||
|
crt.crt_dzfd, 0) == -1) {
|
||||||
|
_FATAL("Cannot map ld.so\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
crt.crt_dp = &_DYNAMIC;
|
||||||
|
crt.crt_ep = environ;
|
||||||
|
crt.crt_bp = (caddr_t)_callmain;
|
||||||
|
|
||||||
|
#if defined(sparc) && defined(SUN_COMPAT)
|
||||||
|
/* Call Sun's ld.so entry point: version 1, offset crt */
|
||||||
|
__call(CRT_VERSION_SUN, &crt, crt.crt_ba + sizeof hdr);
|
||||||
|
#else
|
||||||
|
entry = (void (*)())(crt.crt_ba + sizeof hdr);
|
||||||
|
#ifdef SUN_COMPAT
|
||||||
|
(*entry)(CRT_VERSION_SUN, &crt);
|
||||||
|
#else
|
||||||
|
(*entry)(CRT_VERSION_BSD, &crt);
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined(sun) && defined(DUPZFD)
|
||||||
|
if (dup2(dupzfd, crt.crt_dzfd) < 0) {
|
||||||
|
_FATAL("Cannot dup2 /dev/zero\n");
|
||||||
|
}
|
||||||
|
(void)close(dupzfd);
|
||||||
|
#endif
|
||||||
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
mcount() { }
|
#ifdef sparc
|
||||||
#endif CRT0
|
static
|
||||||
|
__call()
|
||||||
|
{
|
||||||
|
/*
|
||||||
|
* adjust the C generated pointer to the crt struct to the
|
||||||
|
* likings of ld.so, which is an offset relative to its %fp
|
||||||
|
*/
|
||||||
|
#if 0
|
||||||
|
asm("___call:");
|
||||||
|
asm("call %o2");
|
||||||
|
asm("sub %o1, %sp, %o1"); /* adjust parameter */
|
||||||
|
#else Hmmm...
|
||||||
|
asm("mov %i0, %o0");
|
||||||
|
asm("mov %i1, %o1");
|
||||||
|
asm("call %i2");
|
||||||
|
asm("sub %o1, %sp, %o1");
|
||||||
|
/*NOTREACHED, control is transferred directly to our caller */
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Support routines
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int
|
||||||
|
_strncmp(s1, s2, n)
|
||||||
|
register char *s1, *s2;
|
||||||
|
register n;
|
||||||
|
{
|
||||||
|
|
||||||
|
if (n == 0)
|
||||||
|
return (0);
|
||||||
|
do {
|
||||||
|
if (*s1 != *s2++)
|
||||||
|
return (*(unsigned char *)s1 - *(unsigned char *)--s2);
|
||||||
|
if (*s1++ == 0)
|
||||||
|
break;
|
||||||
|
} while (--n != 0);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static char *
|
||||||
|
_getenv(name)
|
||||||
|
register char *name;
|
||||||
|
{
|
||||||
|
extern char **environ;
|
||||||
|
register int len;
|
||||||
|
register char **P, *C;
|
||||||
|
|
||||||
|
for (C = name, len = 0; *C && *C != '='; ++C, ++len);
|
||||||
|
for (P = environ; *P; ++P)
|
||||||
|
if (!_strncmp(*P, name, len))
|
||||||
|
if (*(C = *P + len) == '=') {
|
||||||
|
return(++C);
|
||||||
|
}
|
||||||
|
return (char *)0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef sparc
|
||||||
|
/* System call entry */
|
||||||
|
asm("___syscall:");
|
||||||
|
asm("clr %g1");
|
||||||
|
asm("ta %g0");
|
||||||
|
asm("bgeu Lsyscallx"); /* good result ? */
|
||||||
|
asm("nop");
|
||||||
|
asm("mov -0x1, %o0"); /* Note: no `errno' */
|
||||||
|
asm("Lsyscallx:");
|
||||||
|
asm("jmp %o7 + 0x8");
|
||||||
|
asm("nop");
|
||||||
|
#endif /* sparc */
|
||||||
|
#ifdef i386
|
||||||
|
asm(" ___syscall:");
|
||||||
|
asm(" popl %ecx");
|
||||||
|
asm(" popl %eax");
|
||||||
|
asm(" pushl %ecx");
|
||||||
|
asm(" .byte 0x9a");
|
||||||
|
asm(" .long 0");
|
||||||
|
asm(" .word 7");
|
||||||
|
asm(" pushl %ecx");
|
||||||
|
asm(" jc 1f");
|
||||||
|
asm(" ret");
|
||||||
|
asm(" 1:");
|
||||||
|
asm(" movl $-1,%eax");
|
||||||
|
asm(" ret");
|
||||||
|
#endif /* i386 */
|
||||||
|
|
||||||
|
#endif /* DYNAMIC */
|
||||||
|
|
||||||
|
static char *
|
||||||
|
_strrchr(p, ch)
|
||||||
|
register char *p, ch;
|
||||||
|
{
|
||||||
|
register char *save;
|
||||||
|
|
||||||
|
for (save = NULL;; ++p) {
|
||||||
|
if (*p == ch)
|
||||||
|
save = (char *)p;
|
||||||
|
if (!*p)
|
||||||
|
return(save);
|
||||||
|
}
|
||||||
|
/* NOTREACHED */
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef MCRT0
|
||||||
|
asm (" .text");
|
||||||
|
asm ("_eprol:");
|
||||||
|
#endif
|
||||||
|
@ -32,7 +32,8 @@
|
|||||||
*/
|
*/
|
||||||
|
|
||||||
#if defined(LIBC_SCCS) && !defined(lint)
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||||||
static char sccsid[] = "@(#)gmon.c 5.3 (Berkeley) 5/22/91";
|
/*static char sccsid[] = "from: @(#)gmon.c 5.3 (Berkeley) 5/22/91";*/
|
||||||
|
static char rcsid[] = "$Id: gmon.c,v 1.2 1993/08/01 18:44:18 mycroft Exp $";
|
||||||
#endif /* LIBC_SCCS and not lint */
|
#endif /* LIBC_SCCS and not lint */
|
||||||
|
|
||||||
|
|
||||||
|
@ -30,7 +30,8 @@
|
|||||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
* SUCH DAMAGE.
|
* SUCH DAMAGE.
|
||||||
*
|
*
|
||||||
* @(#)gmon.h 5.2 (Berkeley) 5/6/91
|
* from: @(#)gmon.h 5.2 (Berkeley) 5/6/91
|
||||||
|
* $Id: gmon.h,v 1.2 1993/08/01 18:44:21 mycroft Exp $
|
||||||
*/
|
*/
|
||||||
|
|
||||||
struct phdr {
|
struct phdr {
|
||||||
|
Loading…
Reference in New Issue
Block a user