143 lines
4.1 KiB
C
143 lines
4.1 KiB
C
/* VMS crt0 returning Unix style condition codes.
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Copyright (C) 2001-2019 Free Software Foundation, Inc.
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Contributed by Douglas B. Rupp (rupp@gnat.com).
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This file is part of GCC.
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GCC 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, or (at your option)
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any later version.
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GCC 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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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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/* Sanity check. */
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#if __INITIAL_POINTER_SIZE != 64
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#error "vms-ucrt0.c must be compiled with -mpointer-size=64"
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#endif
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/* Lots of cheat to handle 32bits/64bits pointer conversions.
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We use 'long long' for 64 bits pointers and 'int' for 32 bits pointers. */
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extern void decc$main (void *, void *, void *, void *, unsigned int,
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unsigned int, int *, int *, int *);
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extern int main (int, char **, char **);
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extern int _malloc32 (int);
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#ifdef __ia64__
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#define MAIN_ASM_NAME asm ("ELF$TFRADR")
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#else
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#define MAIN_ASM_NAME
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#endif
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int __main (void *, void *, void *, void *,
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unsigned int, unsigned int) MAIN_ASM_NAME;
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/* From errnodef.h, but we need to emulate the globalval. */
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extern int C$_EXIT1;
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/* From stsdef.h */
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#define STS$V_MSG_NO 0x03
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#define STS$M_INHIB_MSG 0x10000000
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/* Symbol defined while main() is compiled to record the flags used.
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(Note that the symbol defines the value, ie extract the bits from the
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address).
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bit 0 set for 64 bit pointers
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bit 1 set for posix return value. */
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extern char __gcc_main_flags;
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/* From ssdef.h */
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#define SS$_NORMAL 1
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#define MAIN_FLAG_64BIT (1 << 0)
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#define MAIN_FLAG_POSIX (1 << 1)
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int
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__main (void *progxfer, void *cli_util, void *imghdr, void *image_file_desc,
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unsigned int linkflag, unsigned int cliflag)
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{
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int argc;
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int argv;
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int envp;
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int status;
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char **argv64;
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char **envp64;
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unsigned int flags = (unsigned __int64)&__gcc_main_flags;
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/* The argv and envp arrays are 32 bits pointers to 32 bits pointers. */
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decc$main (progxfer, cli_util, imghdr, image_file_desc,
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linkflag, cliflag, &argc, &argv, &envp);
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if (flags & MAIN_FLAG_64BIT)
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{
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int i;
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/* Reallocate argv and envp with 64 bit pointers. */
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argv64 = (char **) _malloc32 (sizeof (char *) * (argc + 1));
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for (i = 0; i < argc; i++)
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argv64[i] = (char *) (__int64)(((int *) (__int64) argv)[i]);
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argv64[argc] = NULL;
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for (i = 0; ((int *) (__int64) envp)[i]; i++)
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;
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envp64 = (char **) _malloc32 (sizeof (char *) * (i + 1));
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for (i = 0; ((int *) (__int64) envp)[i]; i++)
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envp64[i] = (char *)(__int64)(((int *) (__int64) envp)[i]);
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envp64[i] = NULL;
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}
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else
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{
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argv64 = (char **)(__int64)argv;
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envp64 = (char **)(__int64)envp;
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}
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status = main (argc, argv64, envp64);
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if (flags & MAIN_FLAG_POSIX)
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{
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/* Map into a range of 0 - 255. */
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status &= 255;
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if (status != 0)
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{
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int save_status = status;
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status = (__int64) &C$_EXIT1 + ((status - 1) << STS$V_MSG_NO);
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/* An exit failure status requires a "severe" error. All
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status values are defined in errno with a successful (1)
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severity but can be changed to an error (2) severity by
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adding 1. In addition for compatibility with UNIX exit()
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routines we inhibit a run-time error message from being
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generated on exit(1). */
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if (save_status == 1)
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{
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status++;
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status |= STS$M_INHIB_MSG;
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}
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}
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else
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status = SS$_NORMAL;
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}
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return status;
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}
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