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03cbbcb8e8
* m/intel386.h (CRT0_DUMMIES): Remove, inline value in the only user: ecrt0.c. (SOLARIS2): Remove LOAD_AVE_TYPE, LOAD_AVE_CVT, LIBS_MACHINE, unused. (USG5_4): Move LOAD_AVE_TYPE, LOAD_AVE_CVT, FSCALE definitions to the only user: s/unixware.h. * ecrt0.c: Remove #ifndef static. Inline CRT0_DUMMIES definition from m/intel386.h. * s/unixware.h (LOAD_AVE_TYPE, LOAD_AVE_CVT, FSCALE): Definitions moved here from m/intel386.h.
95 lines
3 KiB
C
95 lines
3 KiB
C
/* C code startup routine.
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Copyright (C) 1985, 1986, 1992, 2001, 2002, 2003, 2004,
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2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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/* The standard Vax 4.2 Unix crt0.c cannot be used for Emacs
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because it makes `environ' an initialized variable.
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It is easiest to have a special crt0.c on all machines
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though I don't know whether other machines actually need it. */
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/* On the vax and 68000, in BSD4.2 and USG5.2,
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this is the data format on startup:
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(vax) ap and fp are unpredictable as far as I know; don't use them.
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sp -> word containing argc
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word pointing to first arg string
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[word pointing to next arg string]... 0 or more times
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0
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Optionally:
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[word pointing to environment variable]... 1 or more times
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...
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0
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And always:
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first arg string
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[next arg string]... 0 or more times
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*/
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#ifdef emacs
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#include <config.h>
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#endif
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/* ******** WARNING ********
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Do not insert any data definitions before data_start!
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Since this is the first file linked, the address of the following
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variable should correspond to the start of initialized data space.
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On some systems this is a constant that is independent of the text
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size for shared executables. On others, it is a function of the
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text size. In short, this seems to be the most portable way to
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discover the start of initialized data space dynamically at runtime,
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for either shared or unshared executables, on either swapping or
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virtual systems. It only requires that the linker allocate objects
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in the order encountered, a reasonable model for most Unix systems.
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Similarly, note that the address of _start() should be the start
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of text space. Fred Fish, UniSoft Systems Inc. */
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int data_start = 0;
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char **environ;
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static start1 ();
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/* Define symbol "start": here; some systems want that symbol. */
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asm(" .text ");
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asm(" .globl start ");
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asm(" start: ");
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_start ()
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{
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/* On vax, nothing is pushed here */
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start1 ();
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}
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static
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start1 (bogus_fp, argc, xargv)
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int argc;
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char *xargv;
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{
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register char **argv = &xargv;
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environ = argv + argc + 1;
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if ((char *)environ == xargv)
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environ--;
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exit (main (argc, argv, environ));
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/* Refer to `start1' so GCC will not think it is never called
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and optimize it out. */
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(void) &start1;
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}
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/* arch-tag: 4025c2fb-d6b1-4d29-b1b6-8100b6bd1e74
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(do not change this comment) */
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