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