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-rw-r--r--gcc-4.9/gcc/config/vms/vms.c330
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diff --git a/gcc-4.9/gcc/config/vms/vms.c b/gcc-4.9/gcc/config/vms/vms.c
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+++ b/gcc-4.9/gcc/config/vms/vms.c
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+/* Definitions of target machine GNU compiler. 32bit VMS version.
+ Copyright (C) 2009-2014 Free Software Foundation, Inc.
+ Contributed by Douglas B Rupp (rupp@gnat.com).
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tree.h"
+#include "stringpool.h"
+#include "vms-protos.h"
+#include "ggc.h"
+#include "target.h"
+#include "output.h"
+#include "tm.h"
+#include "dwarf2out.h"
+
+/* Correlation of standard CRTL names with DECCRTL function names. */
+
+/* Name is for a function that allocate memory. Use the 64bit version
+ if -mmalloc64. */
+#define VMS_CRTL_MALLOC (1 << 0)
+
+/* If long pointer are enabled, use _NAME64 instead. */
+#define VMS_CRTL_64 (1 << 1)
+
+/* Prepend s/f before the name. To be applied after the previous rule.
+ use 's' for S float, 'f' for IEEE 32. */
+#define VMS_CRTL_FLOAT32 (1 << 2)
+
+/* Prepend t/g/d before the name. To be applied after the previous rule.
+ use 'g' for VAX G float, 'd' for VAX D float, 't' for IEEE 64. */
+#define VMS_CRTL_FLOAT64 (1 << 3)
+
+/* Prepend d before the name, only if using VAX fp. */
+#define VMS_CRTL_FLOAT64_VAXD (1 << 4)
+
+/* Prepend x before the name for if 128 bit long doubles are enabled. This
+ concern mostly 'printf'-like functions. */
+#define VMS_CRTL_FLOAT128 (1 << 5)
+
+/* From xxx, create xxx, xxxf, xxxl using MATH$XXX_T, MATH$XXX_S
+ and MATH$XXX{_X} if DPML is used. */
+#define VMS_CRTL_DPML (1 << 6)
+
+/* Together with DPML, it means that all variant (ie xxx, xxxf and xxxl) are
+ overridden by decc. Without DPML, it means this is a variant (ie xxxf
+ or xxxl) of a function. */
+#define VMS_CRTL_NODPML (1 << 7)
+
+/* Prepend __bsd44_ before the name. To be applied after the P64
+ rule. */
+#define VMS_CRTL_BSD44 (1 << 8)
+
+/* Define only in 32 bits mode, as this has no 64 bit variants.
+ Concerns getopt/getarg. */
+#define VMS_CRTL_32ONLY (1 << 9)
+
+/* GLobal data prefix (ga_, gl_...) */
+#define VMS_CRTL_G_MASK (7 << 10)
+#define VMS_CRTL_G_NONE (0 << 10)
+#define VMS_CRTL_GA (1 << 10)
+#define VMS_CRTL_GL (2 << 10)
+
+/* Append '_2'. Not compatible with 64. */
+#define VMS_CRTL_FLOATV2 (1 << 13)
+
+struct vms_crtl_name
+{
+ /* The standard C name. */
+ const char *const name;
+
+ /* Flags to drive the translation. */
+ unsigned int flags;
+};
+
+/* Map for the translation. */
+
+static const struct vms_crtl_name vms_crtl_names[] =
+ {
+#include "vms-crtlmap.h"
+ };
+
+/* Number of entires in the above array. */
+
+#define NBR_CRTL_NAMES (sizeof (vms_crtl_names) / sizeof (*vms_crtl_names))
+
+/* List of aliased identifiers. They must be persistent across gc. */
+
+static GTY(()) vec<tree, va_gc> *aliases_id;
+
+/* Add a CRTL translation. This simply use the transparent alias
+ mechanism, which is platform independent and works with the
+ #pragma extern_prefix (which set the assembler name). */
+
+static void
+vms_add_crtl_xlat (const char *name, size_t nlen,
+ const char *id_str, size_t id_len)
+{
+ tree targ;
+
+ /* printf ("vms crtl: %.*s -> %.*s\n", nlen, name, id_len, id_str); */
+
+ targ = get_identifier_with_length (name, nlen);
+ gcc_assert (!IDENTIFIER_TRANSPARENT_ALIAS (targ));
+ IDENTIFIER_TRANSPARENT_ALIAS (targ) = 1;
+ TREE_CHAIN (targ) = get_identifier_with_length (id_str, id_len);
+
+ vec_safe_push (aliases_id, targ);
+}
+
+/* Do VMS specific stuff on builtins: disable the ones that are not
+ standard, mangle names. */
+
+void
+vms_patch_builtins (void)
+{
+ /* enum built_in_function bi; */
+ unsigned int i;
+
+ /* Fwrite on VMS is non-standard. */
+ if (builtin_decl_implicit_p (BUILT_IN_FWRITE))
+ set_builtin_decl_implicit_p (BUILT_IN_FWRITE, false);
+
+ if (builtin_decl_implicit_p (BUILT_IN_FWRITE_UNLOCKED))
+ set_builtin_decl_implicit_p (BUILT_IN_FWRITE_UNLOCKED, false);
+
+ /* Define aliases for names. */
+ for (i = 0; i < NBR_CRTL_NAMES; i++)
+ {
+ const struct vms_crtl_name *n = &vms_crtl_names[i];
+ char res[VMS_CRTL_MAXLEN + 3 + 9 + 1 + 1];
+ int rlen;
+ int nlen = strlen (n->name);
+
+ /* Discard 32ONLY if using 64 bit pointers. */
+ if ((n->flags & VMS_CRTL_32ONLY)
+ && flag_vms_pointer_size == VMS_POINTER_SIZE_64)
+ continue;
+
+ /* Handle DPML unless overridden by decc. */
+ if ((n->flags & VMS_CRTL_DPML)
+ && !(n->flags & VMS_CRTL_NODPML))
+ {
+ const char *p;
+ char alt[VMS_CRTL_MAXLEN + 3];
+
+ memcpy (res, "MATH$", 5);
+ rlen = 5;
+ for (p = n->name; *p; p++)
+ res[rlen++] = TOUPPER (*p);
+ res[rlen++] = '_';
+ res[rlen++] = 'T';
+
+ /* Double version. */
+ if (!(n->flags & VMS_CRTL_FLOAT64))
+ vms_add_crtl_xlat (n->name, nlen, res, rlen);
+
+ /* Float version. */
+ res[rlen - 1] = 'S';
+ memcpy (alt, n->name, nlen);
+ alt[nlen] = 'f';
+ vms_add_crtl_xlat (alt, nlen + 1, res, rlen);
+
+ /* Long double version. */
+ res[rlen - 1] = (LONG_DOUBLE_TYPE_SIZE == 128 ? 'X' : 'T');
+ alt[nlen] = 'l';
+ vms_add_crtl_xlat (alt, nlen + 1, res, rlen);
+
+ if (!(n->flags & (VMS_CRTL_FLOAT32 | VMS_CRTL_FLOAT64)))
+ continue;
+ }
+
+ if (n->flags & VMS_CRTL_FLOAT64_VAXD)
+ continue;
+
+ /* Add the dec-c prefix. */
+ memcpy (res, "decc$", 5);
+ rlen = 5;
+
+ if (n->flags & VMS_CRTL_BSD44)
+ {
+ memcpy (res + rlen, "__bsd44_", 8);
+ rlen += 8;
+ }
+
+ if ((n->flags & VMS_CRTL_G_MASK) != VMS_CRTL_G_NONE)
+ {
+ res[rlen++] = 'g';
+ switch (n->flags & VMS_CRTL_G_MASK)
+ {
+ case VMS_CRTL_GA:
+ res[rlen++] = 'a';
+ break;
+ case VMS_CRTL_GL:
+ res[rlen++] = 'l';
+ break;
+ default:
+ gcc_unreachable ();
+ }
+ res[rlen++] = '_';
+ }
+
+ if (n->flags & VMS_CRTL_FLOAT32)
+ res[rlen++] = 'f';
+
+ if (n->flags & VMS_CRTL_FLOAT64)
+ res[rlen++] = 't';
+
+ if ((n->flags & VMS_CRTL_FLOAT128) && LONG_DOUBLE_TYPE_SIZE == 128)
+ res[rlen++] = 'x';
+
+ memcpy (res + rlen, n->name, nlen);
+
+ if ((n->flags & VMS_CRTL_64) == 0)
+ {
+ rlen += nlen;
+
+ if (n->flags & VMS_CRTL_FLOATV2)
+ {
+ res[rlen++] = '_';
+ res[rlen++] = '2';
+ }
+ vms_add_crtl_xlat (n->name, nlen, res, rlen);
+ }
+ else
+ {
+ char alt[VMS_CRTL_MAXLEN + 3];
+ bool use_64;
+
+ /* Add three translations:
+ _X32 -> X
+ _X64 -> _X64
+ X -> X if short, _X64 if long. */
+ alt[0] = '_';
+ memcpy (alt + 1, n->name, nlen);
+ alt[1 + nlen + 0] = '3';
+ alt[1 + nlen + 1] = '2';
+ alt[1 + nlen + 2] = 0;
+ vms_add_crtl_xlat (alt, nlen + 3, res, rlen + nlen);
+
+ use_64 = (((n->flags & VMS_CRTL_64)
+ && flag_vms_pointer_size == VMS_POINTER_SIZE_64)
+ || ((n->flags & VMS_CRTL_MALLOC)
+ && flag_vms_malloc64
+ && flag_vms_pointer_size != VMS_POINTER_SIZE_NONE));
+ if (!use_64)
+ vms_add_crtl_xlat (n->name, nlen, res, rlen + nlen);
+
+ res[rlen++] = '_';
+ memcpy (res + rlen, n->name, nlen);
+ res[rlen + nlen + 0] = '6';
+ res[rlen + nlen + 1] = '4';
+
+ if (use_64)
+ vms_add_crtl_xlat (n->name, nlen, res, rlen + nlen + 2);
+
+ alt[1 + nlen + 0] = '6';
+ alt[1 + nlen + 1] = '4';
+ vms_add_crtl_xlat (alt, nlen + 3, res, rlen + nlen + 2);
+ }
+ }
+}
+
+/* Always default to .text section. */
+
+section *
+vms_function_section (tree decl ATTRIBUTE_UNUSED,
+ enum node_frequency freq ATTRIBUTE_UNUSED,
+ bool startup ATTRIBUTE_UNUSED,
+ bool exit ATTRIBUTE_UNUSED)
+{
+ return NULL;
+}
+
+/* Additionnal VMS specific code for start_function. */
+
+/* Must be kept in sync with libgcc/config/vms/vms-ucrt0.c */
+#define VMS_MAIN_FLAGS_SYMBOL "__gcc_main_flags"
+#define MAIN_FLAG_64BIT (1 << 0)
+#define MAIN_FLAG_POSIX (1 << 1)
+
+void
+vms_start_function (const char *fnname)
+{
+#if VMS_DEBUGGING_INFO
+ if (vms_debug_main
+ && debug_info_level > DINFO_LEVEL_NONE
+ && strncmp (vms_debug_main, fnname, strlen (vms_debug_main)) == 0)
+ {
+ targetm.asm_out.globalize_label (asm_out_file, VMS_DEBUG_MAIN_POINTER);
+ ASM_OUTPUT_DEF (asm_out_file, VMS_DEBUG_MAIN_POINTER, fnname);
+ dwarf2out_vms_debug_main_pointer ();
+ vms_debug_main = 0;
+ }
+#endif
+
+ /* Registers flags used for function main. This is necessary for
+ crt0 code. */
+ if (strcmp (fnname, "main") == 0)
+ {
+ unsigned int flags = 0;
+
+ if (flag_vms_pointer_size == VMS_POINTER_SIZE_64)
+ flags |= MAIN_FLAG_64BIT;
+ if (!flag_vms_return_codes)
+ flags |= MAIN_FLAG_POSIX;
+
+ targetm.asm_out.globalize_label (asm_out_file, VMS_MAIN_FLAGS_SYMBOL);
+ assemble_name (asm_out_file, VMS_MAIN_FLAGS_SYMBOL);
+ fprintf (asm_out_file, " = %u\n", flags);
+ }
+}
+
+#include "gt-vms.h"