changes to support shared libs.
This commit is contained in:
phil
parent
4e523f8ddb
commit
9d4fe61ad7
@ -1,7 +1,8 @@
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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 1.2 1994/05/03 07:35:28 phil Exp $
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CFLAGS= -O -DLIBC_SCCS
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OBJS= crt0.o gcrt0.o
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CFLAGS+= -DLIBC_SCCS # -DDYNAMIC
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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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all: ${OBJS}
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@ -20,12 +21,12 @@ gcrt0.o: moncrt0.o gmon.o
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${LD} -x -r -o ${.TARGET} moncrt0.o gmon.o
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gmon.o: gmon.c gmon.h
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${CC} -c ${DEFS} ${.IMPSRC}
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${CC} ${CFLAGS} -c ${.IMPSRC}
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${LD} -x -r ${.TARGET}
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mv a.out ${.TARGET}
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install:
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install -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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depend lint tags:
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@ -1,5 +1,5 @@
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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/*
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* Copyright (c) 1993 Paul Kranenburg
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -12,65 +12,106 @@
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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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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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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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* This product includes software developed by Paul Kranenburg.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: crt0.c,v 1.2 1994/05/03 07:35:29 phil Exp $
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*/
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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 rcsid[] = "";
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static char rcsid[] = "$Id: crt0.c,v 1.2 1994/05/03 07:35:29 phil Exp $";
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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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* $Id: crt0.c,v 1.1.1.1 1993/09/17 18:42:11 phil Exp $
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*
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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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* Modified by Phil Nelson for the PC532, July 18, 1993.
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*
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* We make the following (true) assumption:
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* 1) We can trust fp and sp. Both "start" pointing to the
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* first entry in the argc/argv/envp structure... After
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* the "enter [???],?", fp points to the word just before
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* the argc/argv/envp structure!
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*
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*/
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#include <sys/param.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef DYNAMIC
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#include <sys/types.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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static char empty[1];
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char *__progname = empty;
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int errno = 0;
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extern struct _dynamic _DYNAMIC;
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static struct ld_entry *ld_entry;
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static void __do_dynamic_link ();
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static char *_getenv();
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static int _strncmp();
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/* To make sure "start" is past the a.out header. This should go away soon. */
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asm(".text");
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asm(".long 0,0,0,0,0,0,0,0");
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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 eprol asm ("eprol");
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extern start() asm("start");
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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_t)(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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start(long param)
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{
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struct kframe {
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@ -86,37 +127,249 @@ start(long param)
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register char **targv;
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register char **argv;
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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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/* just above the saved frame pointer */
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kfp = (struct kframe *) (¶m-1);
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for (argv = targv = &kfp->kargv[0]; *targv++; /* void */)
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/* void */ ;
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if (targv >= (char **)(*argv))
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--targv;
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environ = targv;
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if (argv[0])
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if ((__progname = _strrchr(argv[0], '/')) == NULL)
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__progname = argv[0];
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else
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++__progname;
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#ifdef DYNAMIC
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/* ld(1) convention: if DYNAMIC = 0 then statically linked */
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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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#ifdef MCRT0
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atexit(_mcleanup);
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monstartup(&eprol, &etext);
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#endif MCRT0
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errno = 0;
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if (argv[0])
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if ((__progname = strrchr(argv[0], '/')) == NULL)
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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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}
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#ifdef CRT0
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/*
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* null mcount and moncontrol,
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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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#ifdef DYNAMIC
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static void
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__do_dynamic_link ()
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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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int (*entry)();
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#ifdef DEBUG
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/* Provision for alternate ld.so - security risk! */
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if (!(ldso = _getenv("LDSO")))
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#endif
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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 && N_GETMAGIC(hdr) != QMAGIC) {
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_FATAL("Bad magic: ld.so\n");
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}
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/* We use MAP_ANON */
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crt.crt_dzfd = -1;
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/* Map in ld.so */
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crt.crt_ba = mmap(0, hdr.a_text,
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PROT_READ|PROT_EXEC,
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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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*/
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#undef N_DATADDR
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#undef N_BSSADDR
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#define N_DATADDR(x) ((x).a_text)
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#define N_BSSADDR(x) ((x).a_text + (x).a_data)
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#endif
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/* Map in data segment of ld.so writable */
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if (mmap(crt.crt_ba+N_DATADDR(hdr), hdr.a_data,
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PROT_READ|PROT_WRITE,
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MAP_FIXED|MAP_COPY,
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crt.crt_ldfd, N_DATOFF(hdr)) == -1) {
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_FATAL("Cannot map ld.so\n");
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}
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/* Map bss segment of ld.so zero */
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if (hdr.a_bss && mmap(crt.crt_ba+N_BSSADDR(hdr), hdr.a_bss,
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PROT_READ|PROT_WRITE,
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MAP_FIXED|MAP_ANON|MAP_COPY,
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crt.crt_dzfd, 0) == -1) {
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_FATAL("Cannot map ld.so\n");
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}
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crt.crt_dp = &_DYNAMIC;
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crt.crt_ep = environ;
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crt.crt_bp = (caddr_t)_callmain;
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crt.crt_prog = __progname;
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entry = (int (*)())(crt.crt_ba + sizeof hdr);
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if ((*entry)(CRT_VERSION_BSD_3, &crt) == -1) {
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_FATAL("ld.so failed\n");
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}
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ld_entry = _DYNAMIC.d_entry;
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return;
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}
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mcount() { }
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#endif CRT0
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/*
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* DL stubs
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*/
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void *
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dlopen(name, mode)
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char *name;
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int mode;
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{
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if (ld_entry == NULL)
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return NULL;
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return (ld_entry->dlopen)(name, mode);
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}
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int
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dlclose(fd)
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void *fd;
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{
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if (ld_entry == NULL)
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return -1;
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return (ld_entry->dlclose)(fd);
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}
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void *
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dlsym(fd, name)
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void *fd;
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char *name;
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{
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if (ld_entry == NULL)
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return NULL;
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return (ld_entry->dlsym)(fd, name);
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}
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int
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dlctl(fd, cmd, arg)
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void *fd, *arg;
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int cmd;
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{
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if (ld_entry == NULL)
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return -1;
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return (ld_entry->dlctl)(fd, cmd, arg);
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}
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/*
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* Support routines
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*/
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static int
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_strncmp(s1, s2, n)
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register char *s1, *s2;
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register n;
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{
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if (n == 0)
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return (0);
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do {
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if (*s1 != *s2++)
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return (*(unsigned char *)s1 - *(unsigned char *)--s2);
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if (*s1++ == 0)
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break;
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} while (--n != 0);
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return (0);
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}
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static char *
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_getenv(name)
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register char *name;
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{
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extern char **environ;
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register int len;
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register char **P, *C;
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for (C = name, len = 0; *C && *C != '='; ++C, ++len);
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for (P = environ; *P; ++P)
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if (!_strncmp(*P, name, len))
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if (*(C = *P + len) == '=') {
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return(++C);
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}
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return (char *)0;
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}
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asm(" ___syscall:");
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asm(" movd tos,r1"); /* return address */
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asm(" movd tos,r0"); /* syscall number */
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asm(" movd r1,tos");
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asm(" svc"); /* do system call */
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asm(" bcc 1f"); /* check error */
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asm(" movqd -1,r0");
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asm(" 1: jump 0(0(sp))"); /* return */
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#ifndef ntohl
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asm(" _ntohl: movd 4(sp),r0");
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asm(" rotw 8,r0");
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asm(" rotd 16,r0");
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asm(" rotw 8,r0");
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asm(" ret 0");
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#endif
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#endif /* DYNAMIC */
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static char *
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_strrchr(p, ch)
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register char *p, ch;
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{
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register char *save;
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for (save = NULL;; ++p) {
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if (*p == ch)
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save = (char *)p;
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if (!*p)
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return(save);
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}
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/* NOTREACHED */
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}
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#ifdef MCRT0
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asm (" .text");
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asm ("_eprol:");
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#endif
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@ -33,7 +33,7 @@
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#if defined(LIBC_SCCS) && !defined(lint)
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/* static char sccsid[] = "@(#)gmon.c 5.3 (Berkeley) 5/22/91"; */
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static char rcsid[] = "";
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static char rcsid[] = "$Id: gmon.c,v 1.2 1994/05/03 07:35:31 phil Exp $";
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#endif /* LIBC_SCCS and not lint */
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@ -198,15 +198,16 @@ mcount()
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*/
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asm(".text"); /* make sure we're in text space */
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/*
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* selfpc = pc pushed by mcount call
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* selfpc = pc pushed by mcount bsr
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*/
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asm("movd 8(fp),%0" : "=r" (selfpc));
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asm("movd 4(fp),%0" : "=r" (selfpc));
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/*
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* frompcindex = pc pushed by jsr into self.
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* In GCC the caller's stack frame has already been built so we
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* have to chase a6 to find caller's raddr.
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* NOTE: this assumes that all profiled routines use link/unlk.
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*/
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asm("movd 4(fp),%0" : "=r" (frompcindex));
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asm("movd 4(0(fp)),%0" : "=r" (frompcindex));
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/*
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* check that we are profiling
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* and that we aren't recursively invoked.
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