nsz Git - libfirm/blob - ir/be/beasm_asm_gnu.c

   1 #ifdef HAVE_CONFIG_H
   2 #include "config.h"
   3 #endif
   4
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <ctype.h>
   8
   9 #include "obst.h"
  10 #include "beasm_asm_gnu.h"
  11
  12 static struct obstack *get_obstack_for_segment ( gnuasm_privdata_t *privdata, asm_segment_t segment ) {
  13
  14         switch (segment) {
  15                 case ASM_SEGMENT_CONST:
  16                         return &privdata->rdata_obst;
  17                         break;
  18                 case ASM_SEGMENT_DATA_INIT:
  19                         return &privdata->data_obst;
  20                         break;
  21                 case ASM_SEGMENT_CODE:
  22                         return &privdata->code_obst;
  23                         break;
  24                 case ASM_SEGMENT_DATA_UNINIT:
  25                         return &privdata->common_obst;
  26                         break;
  27                 default:
  28                         assert(0 && "unknown segment type");
  29                         break;
  30         }
  31   return NULL;
  32 }
  33
  34
  35 /**
  36  * the dumper callbacks
  37  */
  38 static void gnuasm_dump_align(void *data, asm_segment_t segment, int align) {
  39   gnuasm_privdata_t *privdata = data;
  40         struct obstack* obst = get_obstack_for_segment( privdata, segment );
  41         obstack_printf(obst, "\t.align %d\n", align);
  42 }
  43
  44 static void gnuasm_dump_arith_tarval(void *data, asm_segment_t segment, tarval *tv, int bytes)
  45 {
  46   gnuasm_privdata_t *privdata = data;
  47         struct obstack* obst = get_obstack_for_segment ( privdata, segment );
  48
  49         switch (bytes) {
  50
  51         case 1:
  52                 obstack_printf(obst, "0x%02x", get_tarval_sub_bits(tv, 0));
  53                 break;
  54         case 2:
  55                 obstack_printf(obst, "0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
  56                 break;
  57
  58         case 4:
  59                 obstack_printf(obst, "0x%02x%02x%02x%02x",
  60                 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
  61                 break;
  62
  63         case 8:
  64                 obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x",
  65 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
  66                 break;
  67
  68         default:
  69                 fprintf(stderr, "Try to dump an tarval with %d bytes\n", bytes);
  70                 assert(0);
  71         }
  72 }
  73
  74
  75 static void gnuasm_dump_atomic_decl(void *data, asm_segment_t segment, int bytes)
  76 {
  77   gnuasm_privdata_t *privdata = data;
  78         struct obstack* obst = get_obstack_for_segment( privdata, segment );
  79
  80         switch (bytes) {
  81
  82         case 1:
  83                 obstack_printf(obst, "\t.byte\t");
  84                 break;
  85
  86         case 2:
  87                 obstack_printf(obst, "\t.value\t");
  88                 break;
  89
  90         case 4:
  91                 obstack_printf(obst, "\t.long\t");
  92                 break;
  93
  94         case 8:
  95                 obstack_printf(obst, "\t.quad\t");
  96                 break;
  97
  98         default:
  99                 fprintf(stderr, "Try to dump an tarval with %d bytes\n", bytes);
 100                 assert(0);
 101         }
 102
 103 //      obstack_printf(obst, "\n");
 104 }
 105
 106 static void gnuasm_dump_string(void *data, asm_segment_t segment, entity *ent)
 107 {
 108   gnuasm_privdata_t *privdata = data;
 109   int i, n;
 110
 111   struct obstack* obst = get_obstack_for_segment ( privdata, segment );
 112
 113   obstack_printf(obst, "\t.string \"");
 114   n = get_compound_ent_n_values(ent);
 115
 116   for (i = 0; i < n-1; ++i) {
 117     ir_node *irn;
 118     int c;
 119
 120     irn = get_compound_ent_value(ent, i);
 121     c = (int) get_tarval_long(get_Const_tarval(irn));
 122
 123     switch (c) {
 124     case '"' : obstack_printf(obst, "\\\""); break;
 125     case '\n': obstack_printf(obst, "\\n");  break;
 126     case '\r': obstack_printf(obst, "\\r");  break;
 127     case '\t': obstack_printf(obst, "\\t");  break;
 128     default:
 129       if (isprint(c))
 130               obstack_printf(obst, "%c", c);
 131       else
 132               obstack_printf(obst, "%O", c);
 133       break;
 134     }
 135   }
 136   obstack_printf(obst, "\"\n");
 137 }
 138
 139
 140 static void gnuasm_dump_declare_initialized_symbol(void *data, asm_segment_t segment, const char* ld_name, int bytes, int align, ent_visibility visibility)
 141 {
 142   gnuasm_privdata_t* priv_data = data;
 143
 144   /* get the obstack for the given segment (const, data) */
 145   struct obstack* obst = get_obstack_for_segment ( priv_data, segment );
 146
 147   /* if the symbol is externally visible, declare it so. */
 148   if (visibility == visibility_external_visible)
 149     obstack_printf(obst, ".globl\t%s\n", ld_name);
 150
 151   obstack_printf(obst, "\t.type\t%s,@object\n", ld_name);
 152   obstack_printf(obst, "\t.size\t%s,%d\n", ld_name, bytes);
 153   obstack_printf(obst, "\t.align\t%d\n", align);
 154   obstack_printf(obst, "\t%s:\n", ld_name);
 155 }
 156
 157 static void gnuasm_dump_declare_uninitialized_symbol(void *data, asm_segment_t segment, const char* ld_name, int bytes, int align, ent_visibility visibility)
 158 {
 159   gnuasm_privdata_t *priv_data = data;
 160
 161   /* external symbols are not required to be declared in gnuasm. */
 162   if(visibility == visibility_external_allocated) return;
 163
 164   /* declare local, uninitialized symbol to the uninit-obst */
 165   obstack_printf(&priv_data->common_obst, "\t.comm\t%s,%d,%d\n", ld_name, bytes, align);
 166 }
 167
 168 static void gnuasm_dump_zero_padding(void *data, asm_segment_t segment, int size)
 169 {
 170   gnuasm_privdata_t *privdata = data;
 171         struct obstack* obst = get_obstack_for_segment ( privdata, segment );
 172         obstack_printf(obst, "\t.zero\t%d\n", size);
 173 }
 174
 175 ////////////////////////////////////////////////////////////////////////////
 176
 177 static void gnuasm_dump_arith_op(void *data, asm_segment_t segment, asm_arith_operation_t op)
 178 {
 179   gnuasm_privdata_t *privdata = data;
 180         struct obstack* obst = get_obstack_for_segment ( privdata, segment );
 181         switch (op) {
 182                 case ASM_ARITH_OPERATION_ADD:
 183                         obstack_printf(obst, "+");
 184                         break;
 185                 case ASM_ARITH_OPERATION_SUB:
 186                         obstack_printf(obst, "-");
 187                         break;
 188                 case ASM_ARITH_OPERATION_MUL:
 189                         obstack_printf(obst, "*");
 190                         break;
 191         }
 192         //obstack_printf(obst, "+");
 193 }
 194
 195 static void gnuasm_dump_symconst(void *data, asm_segment_t segment, ir_node *init)
 196 {
 197   gnuasm_privdata_t *privdata = data;
 198   struct obstack* obst = get_obstack_for_segment ( privdata, segment );
 199   switch (get_SymConst_kind(init)) {
 200     case symconst_addr_name:
 201         obstack_printf(obst, "%s", get_id_str(get_SymConst_name(init)));
 202       break;
 203
 204     case symconst_addr_ent:
 205         obstack_printf(obst, "%s", get_entity_ld_name(get_SymConst_entity(init)));
 206       break;
 207
 208     case symconst_size:
 209         obstack_printf(obst, "%d", get_type_size_bytes(get_SymConst_type(init)));
 210       break;
 211
 212     default:
 213       assert(0 && "dump_atomic_init(): don't know how to init from this SymConst");
 214     }
 215 }
 216
 217 static void gnuasm_dump_newline(void *data, asm_segment_t segment)
 218 {
 219   gnuasm_privdata_t *privdata = data;
 220         struct obstack* obst = get_obstack_for_segment ( privdata, segment );
 221         obstack_printf(obst, "\n");
 222 }
 223
 224 //////////////////////////////////////////////////////////////////////////////
 225
 226 static void gnuasm_dump_header(void *data) {
 227   gnuasm_privdata_t *privdata = data;
 228 }
 229
 230 static void gnuasm_dump_footer(void *data) {
 231   gnuasm_privdata_t *privdata = data;
 232 }
 233
 234 static void gnuasm_dump_segment_header(void *data) {
 235   gnuasm_privdata_t *privdata = data;
 236 }
 237
 238 //////////////////////////////////////////////////////////////////////////////
 239
 240 assembler_t *gnuasm_create_assembler ( void ) {
 241
 242         gnuasm_privdata_t *priv_data = malloc ( sizeof(gnuasm_privdata_t ));
 243         assembler_t *assembler = malloc ( sizeof( assembler_t ));
 244         memset(assembler, 0, sizeof( assembler_t ));
 245         assembler->private_data = priv_data;
 246
 247         obstack_init (&priv_data->common_obst);
 248         obstack_init (&priv_data->data_obst);
 249         obstack_init (&priv_data->rdata_obst);
 250         obstack_init (&priv_data->code_obst);
 251
 252
 253   assembler->dump_declare_uninitialized_symbol = gnuasm_dump_declare_uninitialized_symbol;
 254   assembler->dump_declare_initialized_symbol   = gnuasm_dump_declare_initialized_symbol;
 255
 256 //  assembler->dump_align = (dump_align_proc) &gnuasm_dump_align;
 257         assembler->dump_arith_tarval = gnuasm_dump_arith_tarval;
 258         assembler->dump_atomic_decl  = gnuasm_dump_atomic_decl;
 259         assembler->dump_string       = gnuasm_dump_string;
 260         assembler->dump_zero_padding = gnuasm_dump_zero_padding;
 261         assembler->dump_arith_op     = gnuasm_dump_arith_op;
 262         assembler->dump_symconst     = gnuasm_dump_symconst;
 263         assembler->dump_newline      = gnuasm_dump_newline;
 264
 265         assembler->dump_header         = gnuasm_dump_header;
 266         assembler->dump_footer         = gnuasm_dump_footer;
 267         assembler->dump_segment_header = gnuasm_dump_segment_header;
 268
 269
 270         return assembler;
 271
 272 }
 273
 274 static void gnuasm_dump_obst(struct obstack *obst, FILE *out) {
 275         obstack_grow0 (obst, NULL, 0);
 276         fprintf(out, "%s", (char *)obstack_finish(obst));
 277 }
 278
 279 void gnuasm_dump( assembler_t *assembler, FILE *out ) {
 280
 281         gnuasm_privdata_t *privdata = assembler->private_data;
 282
 283 //      fprintf(out, "<COMMON>\n");
 284         gnuasm_dump_obst ( &privdata->common_obst, out);
 285         fprintf(out, ".data\n");
 286         gnuasm_dump_obst ( &privdata->data_obst, out);
 287         fprintf(out, ".section .rodata\n");
 288         gnuasm_dump_obst ( &privdata->rdata_obst, out);
 289         fprintf(out, ".text\n");
 290         gnuasm_dump_obst ( &privdata->code_obst, out);
 291         //////
 292 }
 293
 294 void gnuasm_delete_assembler( assembler_t *assembler ) {
 295         free( assembler->private_data );
 296         free( assembler );
 297 }