diff options
| -rw-r--r-- | lib/csu/i386/Makefile | 33 | ||||
| -rw-r--r-- | lib/csu/i386/crt0.c | 108 |
2 files changed, 141 insertions, 0 deletions
diff --git a/lib/csu/i386/Makefile b/lib/csu/i386/Makefile new file mode 100644 index 0000000..bb1c66e --- /dev/null +++ b/lib/csu/i386/Makefile @@ -0,0 +1,33 @@ +# @(#)Makefile 5.6 (Berkeley) 5/22/91 + +CFLAGS= -O -DLIBC_SCCS +OBJS= crt0.o gcrt0.o +CLEANFILES+= gmon.o moncrt0.o core a.out + +all: ${OBJS} + +crt0.o: crt0.c + ${CC} ${CFLAGS} -c -DCRT0 ${.ALLSRC} + ${LD} -x -r ${.TARGET} + mv a.out ${.TARGET} + +moncrt0.o: crt0.c + ${CC} ${CFLAGS} -c -DMCRT0 ${.ALLSRC} -o ${.TARGET} + ${LD} -x -r ${.TARGET} + mv a.out ${.TARGET} + +gcrt0.o: moncrt0.o gmon.o + ${LD} -x -r -o ${.TARGET} moncrt0.o gmon.o + +gmon.o: gmon.c gmon.h + ${CC} -c ${DEFS} ${.IMPSRC} + ${LD} -x -r ${.TARGET} + mv a.out ${.TARGET} + +install: + install -o ${BINOWN} -g ${BINGRP} -m 444 ${OBJS} \ + ${DESTDIR}/usr/lib + +depend lint tags: + +.include <bsd.prog.mk> diff --git a/lib/csu/i386/crt0.c b/lib/csu/i386/crt0.c new file mode 100644 index 0000000..363098b --- /dev/null +++ b/lib/csu/i386/crt0.c @@ -0,0 +1,108 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * 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 the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)crt0.c 5.7 (Berkeley) 7/3/91"; +#endif /* LIBC_SCCS and not lint */ + + +/* + * C start up routine. + * Robert Henry, UCB, 20 Oct 81 + * + * We make the following (true) assumption: + * 1) The only register variable that we can trust is the frame pointer, + * ebp, which points to the base of the kernel calling frame. + */ + +char **environ = (char **)0; +int errno = 0; + +asm(".text"); +asm(".long 0xc000c000"); + +extern unsigned char etext; +extern unsigned char eprol asm ("eprol"); +extern start() asm("start"); +extern mcount() asm ("mcount"); + +start() +{ + struct kframe { + int kargc; + char *kargv[1]; /* size depends on kargc */ + char kargstr[1]; /* size varies */ + char kenvstr[1]; /* size varies */ + }; + /* + * ALL REGISTER VARIABLES!!! + */ + register struct kframe *kfp; + register char **targv; + register char **argv; + extern void _mcleanup(); + +#ifdef lint + kfp = 0; + initcode = initcode = 0; +#else not lint + /* just above the saved frame pointer */ + asm ("lea 4(%%ebp), %0" : "=r" (kfp) ); +#endif not lint + for (argv = targv = &kfp->kargv[0]; *targv++; /* void */) + /* void */ ; + if (targv >= (char **)(*argv)) + --targv; + environ = targv; +asm("eprol:"); + +#ifdef MCRT0 + atexit(_mcleanup); + monstartup(&eprol, &etext); +#endif MCRT0 + exit(main(kfp->kargc, argv, environ)); +} + +#ifdef CRT0 +/* + * null mcount and moncontrol, + * just in case some routine is compiled for profiling + */ +moncontrol(val) + int val; +{ + +} + +mcount() { } +#endif CRT0 |
