diff options
author | obrien <obrien@FreeBSD.org> | 2001-12-15 18:54:06 +0000 |
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committer | obrien <obrien@FreeBSD.org> | 2001-12-15 18:54:06 +0000 |
commit | 994cab589b53047338727cf60ea42223f294cc51 (patch) | |
tree | 5825dcc130253bde9e36f6832942546197d697d4 /lib/csu/sparc64/crt1.c | |
parent | f08c2d4835ac6407cd0d1a3a068335347ce31238 (diff) | |
download | FreeBSD-src-994cab589b53047338727cf60ea42223f294cc51.zip FreeBSD-src-994cab589b53047338727cf60ea42223f294cc51.tar.gz |
Sparc64 ELF version of the C runtime support.
It tries to comply with the SCD 2.4.1 (and thus Sparc 64-bit psABI).
This is an amalgamation of the FreeBSD Alpha crt1.c and the BSD/OS Sparc
crt0.c (which the copyright reflects).
Diffstat (limited to 'lib/csu/sparc64/crt1.c')
-rw-r--r-- | lib/csu/sparc64/crt1.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/lib/csu/sparc64/crt1.c b/lib/csu/sparc64/crt1.c new file mode 100644 index 0000000..2d13f31 --- /dev/null +++ b/lib/csu/sparc64/crt1.c @@ -0,0 +1,128 @@ +/* + * Copyright 2001 David E. O'Brien + * All rights reserved. + * Copyright (c) 1995, 1998 Berkeley Software Design, Inc. + * All rights reserved. + * Copyright 1996-1998 John D. Polstra. + * 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. The name of the authors 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 __GNUC__ +#error "GCC is needed to compile this file" +#endif + +#include <stdlib.h> +#include "crtbrand.c" + +struct Struct_Obj_Entry; +struct ps_strings; + +#pragma weak _DYNAMIC +extern int _DYNAMIC; + +extern void _init(void); +extern void _fini(void); +extern int main(int, char **, char **); + +#ifdef GCRT +extern void _mcleanup(void); +extern void monstartup(void *, void *); +extern int eprol; +extern int etext; +#endif + +char **environ; +char *__progname = ""; + +/* The entry function. */ + * + * %o0 holds ps_strings pointer. For Solaris compat and/or shared + * libraries, if %g1 is not 0, it is a routine to pass to atexit(). + * (By passing the pointer in the usual argument register, we avoid + * having to do any inline assembly, except to recover %g1.) + * + * Note: kernel may (is not set in stone yet) pass ELF aux vector in %o1, + * but for now we do not use it here. + */ +void +_start(char **ap, + void (*cleanup)(void), /* from shared loader */ + struct Struct_Obj_Entry *obj, /* from shared loader */ + struct ps_strings *ps_strings) +{ + int argc; + char **argv; + char **env; + void (*term)(void); + + /* Grab %g1 before it gets used for anything by the compiler. */ + /* Sparc ELF psABI specifies a termination routine (if any) will be in + %g1 */ + __asm__ volatile("mov %%g1,%0" : "=r"(term)); + + argc = * (long *) ap; + argv = ap + 1; + env = ap + 2 + argc; + environ = env; + if(argc > 0 && argv[0] != NULL) { + char *s; + __progname = argv[0]; + for (s = __progname; *s != '\0'; s++) + if (*s == '/') + __progname = s + 1; + } + + /* + * If the kernel or a shared library wants us to call + * a termination function, arrange to do so. + */ + if (term) + atexit(term); + + if (&_DYNAMIC != NULL) + atexit(cleanup); + +#ifdef GCRT + atexit(_mcleanup); +#endif + atexit(_fini); +#ifdef GCRT + monstartup(&eprol, &etext); +#endif + _init(); + exit( main(argc, argv, env) ); +} + +#ifdef GCRT +__asm__(".text"); +__asm__("eprol:"); +__asm__(".previous"); +#endif + +/* + * NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text. + */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); |