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- comment @ * @;
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- 1.3
- date 92.08.09.20.47.19; author amiga; state Exp;
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- 1.2
- date 92.07.04.19.13.42; author mwild; state Exp;
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- 1.1
- date 92.05.14.19.55.40; author mwild; state Exp;
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-
-
- desc
- @startup function for programs invoked by an ixemul shell
- @
-
-
- 1.3
- log
- @call main thru exit, or no atexit handlers will be called!
- @
- text
- @/*
- * This file is part of ixemul.library for the Amiga.
- * Copyright (C) 1991, 1992 Markus M. Wild
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * $Id: ix_exec_entry.c,v 1.2 1992/07/04 19:13:42 mwild Exp $
- *
- * $Log: ix_exec_entry.c,v $
- * Revision 1.2 1992/07/04 19:13:42 mwild
- * add SIGWINCH handler installation/removal
- *
- * Revision 1.1 1992/05/14 19:55:40 mwild
- * Initial revision
- *
- */
-
- #define KERNEL
- #include "ixemul.h"
-
- #ifdef DEBUG
- #define DP(a) kprintf a
- #else
- #define DP(a)
- #endif
-
- #define exit_buf u.u_jmp_buf
- extern struct ExecBase *SysBase;
-
- int
- ix_exec_entry (int argc, char **argv, char **environ, int *real_errno,
- int (*main)(int, char **, char **))
- {
- struct Process *me = (struct Process *) SysBase->ThisTask;
- int exit_val;
-
- /* we're coming from another process here, either after vfork() or from a
- * process that wants to `replace' itself with this program. Thus the fpu
- * is probably already initialized to some bogous state. That's why we
- * HAVE to restore it into a default state here. */
-
- if (SysBase->AttnFlags & AFF_68881)
- /* reset fpu into a defined state */
- asm volatile ("
- moveml a5/a6,sp@@-
- lea pc@@(Lreset_fpu-.+2),a5
- movel 4:w,a6
- jsr a6@@(-30) | Supervisor()
- bra Lafter_reset_fpu
-
- Lreset_fpu:
- clrl sp@@-
- frestore sp@@+
- rte
-
- Lafter_reset_fpu:
- moveml sp@@+,a5/a6");
-
-
- DP(("ix_exec_entry: argc = %ld, argv = $%lx\n", argc, argv));
-
- /* a program started by ix_exec_entry() must have some ix'like shell
- around, that takes care of printing exit-states, so don't print them
- again in sig_exit() */
- u.u_argline = 0;
- u.u_arglinelen = 0;
-
- if (real_errno) u.u_errno = real_errno;
-
- exit_val = setjmp (exit_buf);
-
- if (! exit_val)
- {
- /* install the signal mask that was active before execve() was called */
- syscall (SYS_sigsetmask, u.u_oldmask);
-
- /* this is not really the right thing to do, the user should call
- ix_get_vars2 () to initialize environ to the address of the variable
- in the calling program. However, this setting guarantees that
- the user area entry is valid for getenv() calls. */
- u.u_environ = &environ;
-
- ix_install_sigwinch ();
-
- /* the first time thru call the program */
- exit (main (argc, argv, environ));
- /* not reached! */
- }
- else
- /* in this case we came from a longjmp-call */
- exit_val --;
-
- ix_remove_sigwinch ();
-
- DP(("ix_exec_entry(end): sp = $%lx\n",({int res;asm("movel sp,%0" : "=g" (res));res;})));
-
- return exit_val;
- }
- @
-
-
- 1.2
- log
- @add SIGWINCH handler installation/removal
- @
- text
- @d19 1
- a19 1
- * $Id: ix_exec_entry.c,v 1.1 1992/05/14 19:55:40 mwild Exp $
- d22 3
- d40 1
- a45 1
- struct ExecBase *SysBase = *(void **)4;
- d98 2
- a99 1
- exit_val = main (argc, argv, environ);
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d19 1
- a19 1
- * $Id$
- d21 4
- a24 1
- * $Log$
- d71 4
- a74 2
- /* for usage by sys_exit() for example */
- u.u_argline = (char *) argv;
- d92 2
- d100 2
- @
-