gcc/config/v850/v850-c.c

   1 /* v850 specific, C compiler specific functions.
   2    Copyright (C) 2000-2018 Free Software Foundation, Inc.
   3    Contributed by Jeff Law (law@cygnus.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 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define IN_TARGET_CODE 1
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "coretypes.h"
  26 #include "tm.h"
  27 #include "tree.h"
  28 #include "stringpool.h"
  29 #include "diagnostic-core.h"
  30 #include "attribs.h"
  31 #include "c-family/c-pragma.h"
  32
  33 #ifndef streq
  34 #define streq(a,b) (strcmp (a, b) == 0)
  35 #endif
  36 \f
  37 static int  pop_data_area          (v850_data_area);
  38 static int  push_data_area         (v850_data_area);
  39 static void mark_current_function_as_interrupt (void);
  40 \f
  41 /* Push a data area onto the stack.  */
  42
  43 static int
  44 push_data_area (v850_data_area data_area)
  45 {
  46   data_area_stack_element * elem;
  47
  48   elem = (data_area_stack_element *) xmalloc (sizeof (* elem));
  49
  50   if (elem == NULL)
  51     return 0;
  52
  53   elem->prev      = data_area_stack;
  54   elem->data_area = data_area;
  55
  56   data_area_stack = elem;
  57
  58   return 1;
  59 }
  60
  61 /* Remove a data area from the stack.  */
  62
  63 static int
  64 pop_data_area (v850_data_area data_area)
  65 {
  66   if (data_area_stack == NULL)
  67     warning (OPT_Wpragmas, "#pragma GHS endXXXX found without "
  68              "previous startXXX");
  69   else if (data_area != data_area_stack->data_area)
  70     warning (OPT_Wpragmas, "#pragma GHS endXXX does not match "
  71              "previous startXXX");
  72   else
  73     {
  74       data_area_stack_element * elem;
  75
  76       elem = data_area_stack;
  77       data_area_stack = data_area_stack->prev;
  78
  79       free (elem);
  80
  81       return 1;
  82     }
  83
  84   return 0;
  85 }
  86
  87 /* Set the machine specific 'interrupt' attribute on the current function.  */
  88
  89 static void
  90 mark_current_function_as_interrupt (void)
  91 {
  92   tree name;
  93
  94   if (current_function_decl ==  NULL_TREE)
  95     {
  96       warning (0, "cannot set interrupt attribute: no current function");
  97       return;
  98     }
  99
 100   name = get_identifier ("interrupt");
 101
 102   if (name == NULL_TREE || TREE_CODE (name) != IDENTIFIER_NODE)
 103     {
 104       warning (0, "cannot set interrupt attribute: no such identifier");
 105       return;
 106     }
 107
 108   decl_attributes (&current_function_decl,
 109                    tree_cons (name, NULL_TREE, NULL_TREE), 0);
 110 }
 111
 112 \f
 113 /* Support for GHS pragmata.  */
 114
 115 void
 116 ghs_pragma_section (cpp_reader * pfile ATTRIBUTE_UNUSED)
 117 {
 118   int repeat = 0;
 119
 120   /* #pragma ghs section [name = alias [, name = alias [, ...]]] */
 121   do
 122     {
 123       tree x;
 124       enum cpp_ttype type;
 125       tree sect_ident;
 126       const char *sect, *alias;
 127       enum GHS_section_kind kind;
 128
 129       type = pragma_lex (&x);
 130
 131       if (type == CPP_EOF && !repeat)
 132         goto reset;
 133       else if (type == CPP_NAME)
 134         {
 135           sect_ident = x;
 136           sect = IDENTIFIER_POINTER (sect_ident);
 137         }
 138       else
 139         goto bad;
 140       repeat = 0;
 141
 142       if (pragma_lex (&x) != CPP_EQ)
 143         goto bad;
 144       if (pragma_lex (&x) != CPP_NAME)
 145         goto bad;
 146
 147       alias = IDENTIFIER_POINTER (x);
 148
 149       type = pragma_lex (&x);
 150       if (type == CPP_COMMA)
 151         repeat = 1;
 152       else if (type != CPP_EOF)
 153         warning (OPT_Wpragmas, "junk at end of #pragma ghs section");
 154
 155       if      (streq (sect, "data"))    kind = GHS_SECTION_KIND_DATA;
 156       else if (streq (sect, "text"))    kind = GHS_SECTION_KIND_TEXT;
 157       else if (streq (sect, "rodata"))  kind = GHS_SECTION_KIND_RODATA;
 158       else if (streq (sect, "const"))   kind = GHS_SECTION_KIND_RODATA;
 159       else if (streq (sect, "rosdata")) kind = GHS_SECTION_KIND_ROSDATA;
 160       else if (streq (sect, "rozdata")) kind = GHS_SECTION_KIND_ROZDATA;
 161       else if (streq (sect, "sdata"))   kind = GHS_SECTION_KIND_SDATA;
 162       else if (streq (sect, "tdata"))   kind = GHS_SECTION_KIND_TDATA;
 163       else if (streq (sect, "zdata"))   kind = GHS_SECTION_KIND_ZDATA;
 164       /* According to GHS beta documentation, the following should not be
 165          allowed!  */
 166       else if (streq (sect, "bss"))     kind = GHS_SECTION_KIND_BSS;
 167       else if (streq (sect, "zbss"))    kind = GHS_SECTION_KIND_ZDATA;
 168       else
 169         {
 170           warning (0, "unrecognized section name %qE", sect_ident);
 171           return;
 172         }
 173
 174       if (streq (alias, "default"))
 175         GHS_current_section_names [kind] = NULL;
 176       else
 177         GHS_current_section_names [kind] = alias;
 178     }
 179   while (repeat);
 180
 181   return;
 182
 183  bad:
 184   warning (OPT_Wpragmas, "malformed #pragma ghs section");
 185   return;
 186
 187  reset:
 188   /* #pragma ghs section \n: Reset all section names back to their defaults.  */
 189   {
 190     int i;
 191
 192     for (i = COUNT_OF_GHS_SECTION_KINDS; i--;)
 193       GHS_current_section_names [i] = NULL;
 194   }
 195 }
 196
 197 void
 198 ghs_pragma_interrupt (cpp_reader * pfile ATTRIBUTE_UNUSED)
 199 {
 200   tree x;
 201
 202   if (pragma_lex (&x) != CPP_EOF)
 203     warning (OPT_Wpragmas, "junk at end of #pragma ghs interrupt");
 204
 205   mark_current_function_as_interrupt ();
 206 }
 207
 208 void
 209 ghs_pragma_starttda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 210 {
 211   tree x;
 212
 213   if (pragma_lex (&x) != CPP_EOF)
 214     warning (OPT_Wpragmas, "junk at end of #pragma ghs starttda");
 215
 216   push_data_area (DATA_AREA_TDA);
 217 }
 218
 219 void
 220 ghs_pragma_startsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 221 {
 222   tree x;
 223
 224   if (pragma_lex (&x) != CPP_EOF)
 225     warning (OPT_Wpragmas, "junk at end of #pragma ghs startsda");
 226
 227   push_data_area (DATA_AREA_SDA);
 228 }
 229
 230 void
 231 ghs_pragma_startzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 232 {
 233   tree x;
 234
 235   if (pragma_lex (&x) != CPP_EOF)
 236     warning (OPT_Wpragmas, "junk at end of #pragma ghs startzda");
 237
 238   push_data_area (DATA_AREA_ZDA);
 239 }
 240
 241 void
 242 ghs_pragma_endtda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 243 {
 244   tree x;
 245
 246   if (pragma_lex (&x) != CPP_EOF)
 247     warning (OPT_Wpragmas, "junk at end of #pragma ghs endtda");
 248
 249   pop_data_area (DATA_AREA_TDA);
 250 }
 251
 252 void
 253 ghs_pragma_endsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 254 {
 255   tree x;
 256
 257   if (pragma_lex (&x) != CPP_EOF)
 258     warning (OPT_Wpragmas, "junk at end of #pragma ghs endsda");
 259
 260   pop_data_area (DATA_AREA_SDA);
 261 }
 262
 263 void
 264 ghs_pragma_endzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 265 {
 266   tree x;
 267
 268   if (pragma_lex (&x) != CPP_EOF)
 269     warning (OPT_Wpragmas, "junk at end of #pragma ghs endzda");
 270
 271   pop_data_area (DATA_AREA_ZDA);
 272 }