gnu/dist/gcc4/gcc/config/v850/v850-c.c

   1 /* v850 specific, C compiler specific functions.
   2    Copyright (C) 2000 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 2, 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 COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "cpplib.h"
  27 #include "tree.h"
  28 #include "c-pragma.h"
  29 #include "toplev.h"
  30 #include "ggc.h"
  31 #include "tm_p.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;
 119
 120   /* #pragma ghs section [name = alias [, name = alias [, ...]]] */
 121   do
 122     {
 123       tree x;
 124       enum cpp_ttype type;
 125       const char *sect, *alias;
 126       enum GHS_section_kind kind;
 127
 128       type = c_lex (&x);
 129
 130       if (type == CPP_EOF && !repeat)
 131         goto reset;
 132       else if (type == CPP_NAME)
 133         sect = IDENTIFIER_POINTER (x);
 134       else
 135         goto bad;
 136       repeat = 0;
 137
 138       if (c_lex (&x) != CPP_EQ)
 139         goto bad;
 140       if (c_lex (&x) != CPP_NAME)
 141         goto bad;
 142
 143       alias = IDENTIFIER_POINTER (x);
 144
 145       type = c_lex (&x);
 146       if (type == CPP_COMMA)
 147         repeat = 1;
 148       else if (type != CPP_EOF)
 149         warning (OPT_Wpragmas, "junk at end of #pragma ghs section");
 150
 151       if      (streq (sect, "data"))    kind = GHS_SECTION_KIND_DATA;
 152       else if (streq (sect, "text"))    kind = GHS_SECTION_KIND_TEXT;
 153       else if (streq (sect, "rodata"))  kind = GHS_SECTION_KIND_RODATA;
 154       else if (streq (sect, "const"))   kind = GHS_SECTION_KIND_RODATA;
 155       else if (streq (sect, "rosdata")) kind = GHS_SECTION_KIND_ROSDATA;
 156       else if (streq (sect, "rozdata")) kind = GHS_SECTION_KIND_ROZDATA;
 157       else if (streq (sect, "sdata"))   kind = GHS_SECTION_KIND_SDATA;
 158       else if (streq (sect, "tdata"))   kind = GHS_SECTION_KIND_TDATA;
 159       else if (streq (sect, "zdata"))   kind = GHS_SECTION_KIND_ZDATA;
 160       /* According to GHS beta documentation, the following should not be
 161          allowed!  */
 162       else if (streq (sect, "bss"))     kind = GHS_SECTION_KIND_BSS;
 163       else if (streq (sect, "zbss"))    kind = GHS_SECTION_KIND_ZDATA;
 164       else
 165         {
 166           warning (0, "unrecognized section name \"%s\"", sect);
 167           return;
 168         }
 169
 170       if (streq (alias, "default"))
 171         GHS_current_section_names [kind] = NULL;
 172       else
 173         GHS_current_section_names [kind] =
 174           build_string (strlen (alias) + 1, alias);
 175     }
 176   while (repeat);
 177
 178   return;
 179
 180  bad:
 181   warning (OPT_Wpragmas, "malformed #pragma ghs section");
 182   return;
 183
 184  reset:
 185   /* #pragma ghs section \n: Reset all section names back to their defaults.  */
 186   {
 187     int i;
 188
 189     for (i = COUNT_OF_GHS_SECTION_KINDS; i--;)
 190       GHS_current_section_names [i] = NULL;
 191   }
 192 }
 193
 194 void
 195 ghs_pragma_interrupt (cpp_reader * pfile ATTRIBUTE_UNUSED)
 196 {
 197   tree x;
 198
 199   if (c_lex (&x) != CPP_EOF)
 200     warning (OPT_Wpragmas, "junk at end of #pragma ghs interrupt");
 201
 202   mark_current_function_as_interrupt ();
 203 }
 204
 205 void
 206 ghs_pragma_starttda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 207 {
 208   tree x;
 209
 210   if (c_lex (&x) != CPP_EOF)
 211     warning (OPT_Wpragmas, "junk at end of #pragma ghs starttda");
 212
 213   push_data_area (DATA_AREA_TDA);
 214 }
 215
 216 void
 217 ghs_pragma_startsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 218 {
 219   tree x;
 220
 221   if (c_lex (&x) != CPP_EOF)
 222     warning (OPT_Wpragmas, "junk at end of #pragma ghs startsda");
 223
 224   push_data_area (DATA_AREA_SDA);
 225 }
 226
 227 void
 228 ghs_pragma_startzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 229 {
 230   tree x;
 231
 232   if (c_lex (&x) != CPP_EOF)
 233     warning (OPT_Wpragmas, "junk at end of #pragma ghs startzda");
 234
 235   push_data_area (DATA_AREA_ZDA);
 236 }
 237
 238 void
 239 ghs_pragma_endtda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 240 {
 241   tree x;
 242
 243   if (c_lex (&x) != CPP_EOF)
 244     warning (OPT_Wpragmas, "junk at end of #pragma ghs endtda");
 245
 246   pop_data_area (DATA_AREA_TDA);
 247 }
 248
 249 void
 250 ghs_pragma_endsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 251 {
 252   tree x;
 253
 254   if (c_lex (&x) != CPP_EOF)
 255     warning (OPT_Wpragmas, "junk at end of #pragma ghs endsda");
 256
 257   pop_data_area (DATA_AREA_SDA);
 258 }
 259
 260 void
 261 ghs_pragma_endzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
 262 {
 263   tree x;
 264
 265   if (c_lex (&x) != CPP_EOF)
 266     warning (OPT_Wpragmas, "junk at end of #pragma ghs endzda");
 267
 268   pop_data_area (DATA_AREA_ZDA);
 269 }