1/* VMS crt0 returning Unix style condition codes.
2   Copyright (C) 2001-2015 Free Software Foundation, Inc.
3   Contributed by Douglas B. Rupp (rupp@gnat.com).
4
5   This file is part of GCC.
6
7   GCC is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3, or (at your option)
10   any later version.
11
12   GCC is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   Under Section 7 of GPL version 3, you are granted additional
18   permissions described in the GCC Runtime Library Exception, version
19   3.1, as published by the Free Software Foundation.
20
21   You should have received a copy of the GNU General Public License and
22   a copy of the GCC Runtime Library Exception along with this program;
23   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24   <http://www.gnu.org/licenses/>.  */
25
26#include <stdlib.h>
27
28/* Sanity check.  */
29#if __INITIAL_POINTER_SIZE != 64
30#error "vms-ucrt0.c must be compiled with -mpointer-size=64"
31#endif
32
33/* Lots of cheat to handle 32bits/64bits pointer conversions.
34   We use 'long long' for 64 bits pointers and 'int' for 32 bits pointers.  */
35
36extern void decc$main (void *, void *, void *, void *, unsigned int,
37		       unsigned int, int *, int *, int *);
38extern int main (int, char **, char **);
39extern int _malloc32 (int);
40
41#ifdef __ia64__
42#define MAIN_ASM_NAME asm ("ELF$TFRADR")
43#else
44#define MAIN_ASM_NAME
45#endif
46
47int __main (void *, void *, void *, void *,
48	    unsigned int, unsigned int) MAIN_ASM_NAME;
49
50/* From errnodef.h, but we need to emulate the globalval.  */
51extern int C$_EXIT1;
52
53/* From stsdef.h  */
54#define STS$V_MSG_NO 0x03
55#define STS$M_INHIB_MSG 0x10000000
56/* Symbol defined while main() is compiled to record the flags used.
57   (Note that the symbol defines the value, ie extract the bits from the
58    address).
59   bit 0 set for 64 bit pointers
60   bit 1 set for posix return value.  */
61extern char __gcc_main_flags;
62
63/* From ssdef.h  */
64#define SS$_NORMAL 1
65#define MAIN_FLAG_64BIT (1 << 0)
66#define MAIN_FLAG_POSIX (1 << 1)
67
68int
69__main (void *progxfer, void *cli_util, void *imghdr, void *image_file_desc,
70	unsigned int linkflag, unsigned int cliflag)
71{
72  int argc;
73  int argv;
74  int envp;
75  int status;
76  char **argv64;
77  char **envp64;
78  unsigned int flags = (unsigned __int64)&__gcc_main_flags;
79
80  /* The argv and envp arrays are 32 bits pointers to 32 bits pointers.  */
81  decc$main (progxfer, cli_util, imghdr, image_file_desc,
82	     linkflag, cliflag, &argc, &argv, &envp);
83
84  if (flags & MAIN_FLAG_64BIT)
85    {
86      int i;
87
88      /* Reallocate argv and envp with 64 bit pointers.  */
89      argv64 = (char **) _malloc32 (sizeof (char *) * (argc + 1));
90
91      for (i = 0; i < argc; i++)
92        argv64[i] = (char *) (__int64)(((int *) (__int64) argv)[i]);
93
94      argv64[argc] = NULL;
95
96      for (i = 0; ((int *) (__int64) envp)[i]; i++)
97        ;
98      envp64 = (char **) _malloc32 (sizeof (char *) * (i + 1));
99
100      for (i = 0; ((int *) (__int64) envp)[i]; i++)
101        envp64[i] = (char *)(__int64)(((int *) (__int64) envp)[i]);
102
103      envp64[i] = NULL;
104    }
105  else
106    {
107      argv64 = (char **)(__int64)argv;
108      envp64 = (char **)(__int64)envp;
109    }
110
111  status = main (argc, argv64, envp64);
112
113  if (flags & MAIN_FLAG_POSIX)
114    {
115      /* Map into a range of 0 - 255.  */
116      status &= 255;
117
118      if (status != 0)
119	{
120	  int save_status = status;
121
122	  status = (__int64) &C$_EXIT1 + ((status - 1) << STS$V_MSG_NO);
123
124	  /* An exit failure status requires a "severe" error.  All
125	     status values are defined in errno with a successful (1)
126	     severity but can be changed to an error (2) severity by
127	     adding 1.  In addition for compatibility with UNIX exit()
128	     routines we inhibit a run-time error message from being
129	     generated on exit(1).  */
130
131	  if (save_status == 1)
132	    {
133	      status++;
134	      status |= STS$M_INHIB_MSG;
135	    }
136	}
137      else
138	status = SS$_NORMAL;
139    }
140
141  return status;
142}
143