gcc/config/v850/v850-c.c

   1 /* v850 specific, C compiler specific functions.
   2    Copyright (C) 2000-2014 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 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "cpplib.h"
  26 #include "tree.h"
  27 #include "stringpool.h"
  28 #include "attribs.h"
  29 #include "c-family/c-pragma.h"
  30 #include "diagnostic-core.h"
  31 #include "ggc.h"
  32 #include "tm_p.h"
  33
  34 #ifndef streq
  35 #define streq(a,b) (strcmp (a, b) == 0)
  36 #endif
  37 \f
  38 static int  pop_data_area          (v850_data_area);
  39 static int  push_data_area         (v850_data_area);
  40 static void mark_current_function_as_interrupt (void);
  41 \f
  42 /* Push a data area onto the stack.  */
  43
  44 static int
  45 push_data_area (v850_data_area data_area)
  46 {
  47   data_area_stack_element * elem;
  48
  49   elem = (data_area_stack_element *) xmalloc (sizeof (* elem));
  50
  51   if (elem == NULL)
  52     return 0;
  53
  54   elem->prev      = data_area_stack;
  55   elem->data_area = data_area;
  56
  57   data_area_stack = elem;
  58
  59   return 1;
  60 }
  61
  62 /* Remove a data area from the stack.  */
  63
  64 static int
  65 pop_data_area (v850_data_area data_area)
  66 {
  67   if (data_area_stack == NULL)
  68     warning (OPT_Wpragmas, "#pragma GHS endXXXX found without "
  69              "previous startXXX");
  70   else if (data_area != data_area_stack->data_area)
  71     warning (OPT_Wpragmas, "#pragma GHS endXXX does not match "
  72              "previous startXXX");
  73   else
  74     {
  75       data_area_stack_element * elem;
  76
  77       elem = data_area_stack;
  78       data_area_stack = data_area_stack->prev;
  79
  80       free (elem);
  81
  82       return 1;
  83     }
  84
  85   return 0;
  86 }
  87
  88 /* Set the machine specific 'interrupt' attribute on the current function.  */
  89
  90 static void
  91 mark_current_function_as_interrupt (void)
  92 {
  93   tree name;
  94
  95   if (current_function_decl ==  NULL_TREE)
  96     {
  97       warning (0, "cannot set interrupt attribute: no current function");
  98       return;
  99     }
 100
 101   name = get_identifier ("interrupt");
 102
 103   if (name == NULL_TREE || TREE_CODE (name) != IDENTIFIER_NODE)
 104     {
 105       warning (0, "cannot set interrupt attribute: no such identifier");
 106       return;
 107     }
 108
 109   decl_attributes (&current_function_decl,
 110                    tree_cons (name, NULL_TREE, NULL_TREE), 0);
 111 }
 112
 113 \f
 114 /* Support for GHS pragmata.  */
 115
 116 void
 117 ghs_pragma_section (cpp_reader * pfile ATTRIBUTE_UNUSED)
 118 {
 119   int repeat = 0;
 120
 121   /* #pragma ghs section [name = alias [, name = alias [, ...]]] */
 122   do
 123     {
 124       tree x;
 125       enum cpp_ttype type;
 126       tree sect_ident;
 127       const char *sect, *alias;
 128       enum GHS_section_kind kind;
 129
 130       type = pragma_lex (&x);
 131
 132       if (type == CPP_EOF && !repeat)
 133         goto reset;
 134       else if (type == CPP_NAME)
 135         {
 136           sect_ident = x;
 137           sect = IDENTIFIER_POINTER (sect_ident);
 138         }
 139       else
 140         goto bad;
 141       repeat = 0;
 142
 143       if (pragma_lex (&x) != CPP_EQ)
 144         goto bad;
 145       if (pragma_lex (&x) != CPP_NAME)
 146         goto bad;
 147
 148       alias = IDENTIFIER_POINTER (x);
 149
 150       type = pragma_lex (&x);
 151       if (type == CPP_COMMA)
 152         repeat = 1;
 153       else if (type != CPP_EOF)
 154         warning (OPT_Wpragmas, "junk at end of #pragma ghs section");
 155
 156       if      (streq (sect, "data"))    kind = GHS_SECTION_KIND_DATA;
 157       else if (streq (sect, "text"))    kind = GHS_SECTION_KIND_TEXT;
 158       else if (streq (sect, "rodata"))  kind = GHS_SECTION_KIND_RODATA;
 159       else if (streq (sect, "const"))   kind = GHS_SECTION_KIND_RODATA;
 160       else if (streq (sect, "rosdata")) kind = GHS_SECTION_KIND_ROSDATA;
 161       else if (streq (sect, "rozdata")) kind = GHS_SECTION_KIND_ROZDATA;
 162       else if (streq (sect, "sdata"))   kind = GHS_SECTION_KIND_SDATA;
 163       else if (streq (sect, "tdata"))   kind = GHS_SECTION_KIND_TDATA;
 164       else if (streq (sect, "zdata"))   kind = GHS_SECTION_KIND_ZDATA;
 165       /* According to GHS beta documentation, the following should not be
 166          allowed!  */
 167       else if (streq (sect, "bss"))     kind = GHS_SECTION_KIND_BSS;
 168       else if (streq (sect, "zbss"))    kind = GHS_SECTION_KIND_ZDATA;
 169       else
 170         {
 171           warning (0, "unrecognized section name %qE", sect_ident);
 172           return;
 173         }
 174
 175       if (streq (alias, "default"))
 176         GHS_current_section_names [kind] = NULL;
 177       else
 178         GHS_current_section_names [kind] =
 179           build_string (strlen (alias) + 1, alias);
 180     }
 181   while (repeat);
 182
 183   return;
 184
 185  bad:
 186   warning (OPT_Wpragmas, "malformed #pragma ghs section");
 187   return;
 188
 189  reset:
 190   /* #pragma ghs section \n: Reset all section names back to their defaults.  */
 191   {
 192     int i;
 193
 194     for (i = COUNT_OF_GHS_SECTION_KINDS; i--;)
 195       GHS_current_section_names [i] = NULL;
 196   }
 197 }
 198
 199 void
 200 ghs_pragma_interrupt (cpp_reader * pfile ATTRIBUTE_UNUSED)
 201 {
 202   tree x;
 203
 204   if (pragma_lex (&x) != CPP_EOF)
 205     warning (OPT_Wpragmas, "junk at end of #pragma ghs interrupt");
 206
 207   mark_current_function_as_interrupt ();
 208 }
 209
 210 void
 211 ghs_pragma_starttda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 212 {
 213   tree x;
 214
 215   if (pragma_lex (&x) != CPP_EOF)
 216     warning (OPT_Wpragmas, "junk at end of #pragma ghs starttda");
 217
 218   push_data_area (DATA_AREA_TDA);
 219 }
 220
 221 void
 222 ghs_pragma_startsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 223 {
 224   tree x;
 225
 226   if (pragma_lex (&x) != CPP_EOF)
 227     warning (OPT_Wpragmas, "junk at end of #pragma ghs startsda");
 228
 229   push_data_area (DATA_AREA_SDA);
 230 }
 231
 232 void
 233 ghs_pragma_startzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 234 {
 235   tree x;
 236
 237   if (pragma_lex (&x) != CPP_EOF)
 238     warning (OPT_Wpragmas, "junk at end of #pragma ghs startzda");
 239
 240   push_data_area (DATA_AREA_ZDA);
 241 }
 242
 243 void
 244 ghs_pragma_endtda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 245 {
 246   tree x;
 247
 248   if (pragma_lex (&x) != CPP_EOF)
 249     warning (OPT_Wpragmas, "junk at end of #pragma ghs endtda");
 250
 251   pop_data_area (DATA_AREA_TDA);
 252 }
 253
 254 void
 255 ghs_pragma_endsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 256 {
 257   tree x;
 258
 259   if (pragma_lex (&x) != CPP_EOF)
 260     warning (OPT_Wpragmas, "junk at end of #pragma ghs endsda");
 261
 262   pop_data_area (DATA_AREA_SDA);
 263 }
 264
 265 void
 266 ghs_pragma_endzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 267 {
 268   tree x;
 269
 270   if (pragma_lex (&x) != CPP_EOF)
 271     warning (OPT_Wpragmas, "junk at end of #pragma ghs endzda");
 272
 273   pop_data_area (DATA_AREA_ZDA);
 274 }