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 GNU CC.
   6
   7 GNU CC 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 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "cpplib.h"
  25 #include "tree.h"
  26 #include "c-pragma.h"
  27 #include "c-lex.h"
  28 #include "toplev.h"
  29 #include "ggc.h"
  30 #include "tm_p.h"
  31
  32 #ifndef streq
  33 #define streq(a,b) (strcmp (a, b) == 0)
  34 #endif
  35 \f
  36 static int  pop_data_area          PARAMS ((v850_data_area));
  37 static int  push_data_area         PARAMS ((v850_data_area));
  38 static void mark_current_function_as_interrupt PARAMS ((void));
  39 \f
  40 /* Push a data area onto the stack.  */
  41
  42 static int
  43 push_data_area (data_area)
  44      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 (data_area)
  65      v850_data_area data_area;
  66 {
  67   if (data_area_stack == NULL)
  68     warning ("#pragma GHS endXXXX found without previous startXXX");
  69   else if (data_area != data_area_stack->data_area)
  70     warning ("#pragma GHS endXXX does not match previous startXXX");
  71   else
  72     {
  73       data_area_stack_element * elem;
  74
  75       elem = data_area_stack;
  76       data_area_stack = data_area_stack->prev;
  77
  78       free (elem);
  79
  80       return 1;
  81     }
  82
  83   return 0;
  84 }
  85
  86 /* Set the machine specific 'interrupt' attribute on the current function.  */
  87
  88 static void
  89 mark_current_function_as_interrupt ()
  90 {
  91   tree name;
  92
  93   if (current_function_decl ==  NULL_TREE)
  94     {
  95       warning ("cannot set interrupt attribute: no current function");
  96       return;
  97     }
  98
  99   name = get_identifier ("interrupt");
 100
 101   if (name == NULL_TREE || TREE_CODE (name) != IDENTIFIER_NODE)
 102     {
 103       warning ("cannot set interrupt attribute: no such identifier");
 104       return;
 105     }
 106
 107   decl_attributes (&current_function_decl,
 108                    tree_cons (name, NULL_TREE, NULL_TREE), 0);
 109 }
 110
 111 \f
 112 /* Support for GHS pragmata.  */
 113
 114 void
 115 ghs_pragma_section (pfile)
 116      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 ("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 ("unrecognised 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 ("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 (pfile)
 196      cpp_reader *pfile ATTRIBUTE_UNUSED;
 197 {
 198   tree x;
 199
 200   if (c_lex (&x) != CPP_EOF)
 201     warning ("junk at end of #pragma ghs interrupt");
 202
 203   mark_current_function_as_interrupt ();
 204 }
 205
 206 void
 207 ghs_pragma_starttda (pfile)
 208      cpp_reader *pfile ATTRIBUTE_UNUSED;
 209 {
 210   tree x;
 211
 212   if (c_lex (&x) != CPP_EOF)
 213     warning ("junk at end of #pragma ghs starttda");
 214
 215   push_data_area (DATA_AREA_TDA);
 216 }
 217
 218 void
 219 ghs_pragma_startsda (pfile)
 220      cpp_reader *pfile ATTRIBUTE_UNUSED;
 221 {
 222   tree x;
 223
 224   if (c_lex (&x) != CPP_EOF)
 225     warning ("junk at end of #pragma ghs startsda");
 226
 227   push_data_area (DATA_AREA_SDA);
 228 }
 229
 230 void
 231 ghs_pragma_startzda (pfile)
 232      cpp_reader *pfile ATTRIBUTE_UNUSED;
 233 {
 234   tree x;
 235
 236   if (c_lex (&x) != CPP_EOF)
 237     warning ("junk at end of #pragma ghs startzda");
 238
 239   push_data_area (DATA_AREA_ZDA);
 240 }
 241
 242 void
 243 ghs_pragma_endtda (pfile)
 244      cpp_reader *pfile ATTRIBUTE_UNUSED;
 245 {
 246   tree x;
 247
 248   if (c_lex (&x) != CPP_EOF)
 249     warning ("junk at end of #pragma ghs endtda");
 250
 251   pop_data_area (DATA_AREA_TDA);
 252 }
 253
 254 void
 255 ghs_pragma_endsda (pfile)
 256      cpp_reader *pfile ATTRIBUTE_UNUSED;
 257 {
 258   tree x;
 259
 260   if (c_lex (&x) != CPP_EOF)
 261     warning ("junk at end of #pragma ghs endsda");
 262
 263   pop_data_area (DATA_AREA_SDA);
 264 }
 265
 266 void
 267 ghs_pragma_endzda (pfile)
 268      cpp_reader *pfile ATTRIBUTE_UNUSED;
 269 {
 270   tree x;
 271
 272   if (c_lex (&x) != CPP_EOF)
 273     warning ("junk at end of #pragma ghs endzda");
 274
 275   pop_data_area (DATA_AREA_ZDA);
 276 }