1 /* VMS crt0 returning Unix style condition codes.
2 Copyright (C) 2001-2023 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
36 extern void decc$main (void *, void *, void *, void *, unsigned int,
37 unsigned int, int *, int *, int *);
38 extern int main (int, char **, char **);
39 extern int _malloc32 (int);
40
41 #ifdef __ia64__
42 #define MAIN_ASM_NAME asm ("ELF$TFRADR")
43 #else
44 #define MAIN_ASM_NAME
45 #endif
46
47 int __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. */
51 extern int C$_EXIT1;
52
53 /* From stsdef.h */
54 #define STS$V_MSG_NO 0x03
55 #define STS$M_INHIB_MSG 0x10000000
56 /* Symbol defined while main() is compiled to record the flags used.
57 (Note that the symbol defines the value, ie extract the bits from the
58 address).
59 bit 0 set for 64 bit pointers
60 bit 1 set for posix return value. */
61 extern char __gcc_main_flags;
62
63 /* From ssdef.h */
64 #define SS$_NORMAL 1
65 #define MAIN_FLAG_64BIT (1 << 0)
66 #define MAIN_FLAG_POSIX (1 << 1)
67
68 int
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 }