projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 15637ed4 RG |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 32 | */ | |
| 33 | ||
| 34 | #if defined(LIBC_SCCS) && !defined(lint) | |
| 35 | static char sccsid[] = "@(#)crt0.c 5.7 (Berkeley) 7/3/91"; | |
| 36 | #endif /* LIBC_SCCS and not lint */ | |
| 37 | ||
| 38 | ||
| 39 | /* | |
| 40 | * C start up routine. | |
| 41 | * Robert Henry, UCB, 20 Oct 81 | |
| 42 | * | |
| 43 | * We make the following (true) assumption: | |
| 44 | * 1) The only register variable that we can trust is the frame pointer, | |
| 45 | * ebp, which points to the base of the kernel calling frame. | |
| 46 | */ | |
| 47 | ||
| 48 | char **environ = (char **)0; | |
| 49 | int errno = 0; | |
| 50 | ||
| 51 | asm(".text"); | |
| 52 | asm(".long 0xc000c000"); | |
| 2bc2fe21 PR |
53 | #if 1 /* more needed for alignment on i486/gcc-2.3.3 */ |
| 54 | asm(".long 0xc000c000"); | |
| 55 | asm(".long 0xc000c000"); | |
| 56 | asm(".long 0xc000c000"); | |
| 57 | #endif | |
| 15637ed4 RG |
58 | |
| 59 | extern unsigned char etext; | |
| 60 | extern unsigned char eprol asm ("eprol"); | |
| 61 | extern start() asm("start"); | |
| 62 | extern mcount() asm ("mcount"); | |
| 63 | ||
| 64 | start() | |
| 65 | { | |
| 66 | struct kframe { | |
| 67 | int kargc; | |
| 68 | char *kargv[1]; /* size depends on kargc */ | |
| 69 | char kargstr[1]; /* size varies */ | |
| 70 | char kenvstr[1]; /* size varies */ | |
| 71 | }; | |
| 72 | /* | |
| 73 | * ALL REGISTER VARIABLES!!! | |
| 74 | */ | |
| 75 | register struct kframe *kfp; | |
| 76 | register char **targv; | |
| 77 | register char **argv; | |
| 78 | extern void _mcleanup(); | |
| 79 | ||
| 80 | #ifdef lint | |
| 81 | kfp = 0; | |
| 82 | initcode = initcode = 0; | |
| 83 | #else not lint | |
| 84 | /* just above the saved frame pointer */ | |
| 85 | asm ("lea 4(%%ebp), %0" : "=r" (kfp) ); | |
| 86 | #endif not lint | |
| 87 | for (argv = targv = &kfp->kargv[0]; *targv++; /* void */) | |
| 88 | /* void */ ; | |
| 89 | if (targv >= (char **)(*argv)) | |
| 90 | --targv; | |
| 91 | environ = targv; | |
| 92 | asm("eprol:"); | |
| 93 | ||
| 94 | #ifdef MCRT0 | |
| 95 | atexit(_mcleanup); | |
| 96 | monstartup(&eprol, &etext); | |
| 97 | #endif MCRT0 | |
| 98 | exit(main(kfp->kargc, argv, environ)); | |
| 99 | } | |
| 100 | ||
| 101 | #ifdef CRT0 | |
| 102 | /* | |
| 103 | * null mcount and moncontrol, | |
| 104 | * just in case some routine is compiled for profiling | |
| 105 | */ | |
| 106 | moncontrol(val) | |
| 107 | int val; | |
| 108 | { | |
| 109 | ||
| 110 | } | |
| 111 | ||
| 112 | mcount() { } | |
| 113 | #endif CRT0 |