tools/winebuild/utils.c

   1 /*
   2  * Small utility functions for winebuild
   3  *
   4  * Copyright 2000 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #ifdef HAVE_UNISTD_H
  31 # include <unistd.h>
  32 #endif
  33
  34 #include "build.h"
  35
  36 #define MAX_TMP_FILES 8
  37 static const char *tmp_files[MAX_TMP_FILES];
  38 static unsigned int nb_tmp_files;
  39
  40 static const struct
  41 {
  42     const char *name;
  43     enum target_cpu cpu;
  44 } cpu_names[] =
  45 {
  46     { "i386",    CPU_x86 },
  47     { "i486",    CPU_x86 },
  48     { "i586",    CPU_x86 },
  49     { "i686",    CPU_x86 },
  50     { "i786",    CPU_x86 },
  51     { "x86_64",  CPU_x86_64 },
  52     { "sparc",   CPU_SPARC },
  53     { "alpha",   CPU_ALPHA },
  54     { "powerpc", CPU_POWERPC }
  55 };
  56
  57 /* atexit handler to clean tmp files */
  58 static void cleanup_tmp_files(void)
  59 {
  60     unsigned int i;
  61     for (i = 0; i < MAX_TMP_FILES; i++) if (tmp_files[i]) unlink( tmp_files[i] );
  62 }
  63
  64
  65 void *xmalloc (size_t size)
  66 {
  67     void *res;
  68
  69     res = malloc (size ? size : 1);
  70     if (res == NULL)
  71     {
  72         fprintf (stderr, "Virtual memory exhausted.\n");
  73         exit (1);
  74     }
  75     return res;
  76 }
  77
  78 void *xrealloc (void *ptr, size_t size)
  79 {
  80     void *res = realloc (ptr, size);
  81     if (size && res == NULL)
  82     {
  83         fprintf (stderr, "Virtual memory exhausted.\n");
  84         exit (1);
  85     }
  86     return res;
  87 }
  88
  89 char *xstrdup( const char *str )
  90 {
  91     char *res = strdup( str );
  92     if (!res)
  93     {
  94         fprintf (stderr, "Virtual memory exhausted.\n");
  95         exit (1);
  96     }
  97     return res;
  98 }
  99
 100 char *strupper(char *s)
 101 {
 102     char *p;
 103     for (p = s; *p; p++) *p = toupper(*p);
 104     return s;
 105 }
 106
 107 int strendswith(const char* str, const char* end)
 108 {
 109     int l = strlen(str);
 110     int m = strlen(end);
 111     return l >= m && strcmp(str + l - m, end) == 0;
 112 }
 113
 114 void fatal_error( const char *msg, ... )
 115 {
 116     va_list valist;
 117     va_start( valist, msg );
 118     if (input_file_name)
 119     {
 120         fprintf( stderr, "%s:", input_file_name );
 121         if (current_line)
 122             fprintf( stderr, "%d:", current_line );
 123         fputc( ' ', stderr );
 124     }
 125     else fprintf( stderr, "winebuild: " );
 126     vfprintf( stderr, msg, valist );
 127     va_end( valist );
 128     exit(1);
 129 }
 130
 131 void fatal_perror( const char *msg, ... )
 132 {
 133     va_list valist;
 134     va_start( valist, msg );
 135     if (input_file_name)
 136     {
 137         fprintf( stderr, "%s:", input_file_name );
 138         if (current_line)
 139             fprintf( stderr, "%d:", current_line );
 140         fputc( ' ', stderr );
 141     }
 142     vfprintf( stderr, msg, valist );
 143     perror( " " );
 144     va_end( valist );
 145     exit(1);
 146 }
 147
 148 void error( const char *msg, ... )
 149 {
 150     va_list valist;
 151     va_start( valist, msg );
 152     if (input_file_name)
 153     {
 154         fprintf( stderr, "%s:", input_file_name );
 155         if (current_line)
 156             fprintf( stderr, "%d:", current_line );
 157         fputc( ' ', stderr );
 158     }
 159     vfprintf( stderr, msg, valist );
 160     va_end( valist );
 161     nb_errors++;
 162 }
 163
 164 void warning( const char *msg, ... )
 165 {
 166     va_list valist;
 167
 168     if (!display_warnings) return;
 169     va_start( valist, msg );
 170     if (input_file_name)
 171     {
 172         fprintf( stderr, "%s:", input_file_name );
 173         if (current_line)
 174             fprintf( stderr, "%d:", current_line );
 175         fputc( ' ', stderr );
 176     }
 177     fprintf( stderr, "warning: " );
 178     vfprintf( stderr, msg, valist );
 179     va_end( valist );
 180 }
 181
 182 int output( const char *format, ... )
 183 {
 184     int ret;
 185     va_list valist;
 186
 187     va_start( valist, format );
 188     ret = vfprintf( output_file, format, valist );
 189     va_end( valist );
 190     if (ret < 0) fatal_perror( "Output error" );
 191     return ret;
 192 }
 193
 194 /* find a build tool in the path, trying the various names */
 195 char *find_tool( const char * const *names )
 196 {
 197     static char **dirs;
 198     static unsigned int count, maxlen;
 199
 200     char *p, *file;
 201     unsigned int i, len;
 202     struct stat st;
 203
 204     if (!dirs)
 205     {
 206         char *path;
 207
 208         /* split the path in directories */
 209
 210         if (!getenv( "PATH" )) return NULL;
 211         path = xstrdup( getenv( "PATH" ));
 212         for (p = path, count = 2; *p; p++) if (*p == ':') count++;
 213         dirs = xmalloc( count * sizeof(*dirs) );
 214         count = 0;
 215         dirs[count++] = p = path;
 216         while (*p)
 217         {
 218             while (*p && *p != ':') p++;
 219             if (!*p) break;
 220             *p++ = 0;
 221             dirs[count++] = p;
 222         }
 223         for (i = 0; i < count; i++) maxlen = max( maxlen, strlen(dirs[i])+2 );
 224     }
 225
 226     while (*names)
 227     {
 228         len = strlen(*names) + 1;
 229         file = xmalloc( maxlen + len );
 230
 231         for (i = 0; i < count; i++)
 232         {
 233             strcpy( file, dirs[i] );
 234             p = file + strlen(file);
 235             if (p == file) *p++ = '.';
 236             if (p[-1] != '/') *p++ = '/';
 237             strcpy( p, *names );
 238
 239             if (!stat( file, &st ) && S_ISREG(st.st_mode) && (st.st_mode & 0111)) return file;
 240         }
 241         free( file );
 242         names++;
 243     }
 244     return NULL;
 245 }
 246
 247 const char *get_as_command(void)
 248 {
 249     if (!as_command)
 250     {
 251         if (target_alias)
 252         {
 253             as_command = xmalloc( strlen(target_alias) + sizeof("-as") );
 254             strcpy( as_command, target_alias );
 255             strcat( as_command, "-as" );
 256         }
 257         else
 258         {
 259             static const char * const commands[] = { "gas", "as", NULL };
 260             if (!(as_command = find_tool( commands ))) as_command = xstrdup("as");
 261         }
 262
 263         if (force_pointer_size)
 264         {
 265             const char *args = (target_platform == PLATFORM_APPLE) ?
 266                 ((force_pointer_size == 8) ? " -arch x86_64" : " -arch i386") :
 267                 ((force_pointer_size == 8) ? " --64" : " --32");
 268             as_command = xrealloc( as_command, strlen(as_command) + strlen(args) + 1 );
 269             strcat( as_command, args );
 270         }
 271     }
 272     return as_command;
 273 }
 274
 275 const char *get_ld_command(void)
 276 {
 277     if (!ld_command)
 278     {
 279         if (target_alias)
 280         {
 281             ld_command = xmalloc( strlen(target_alias) + sizeof("-ld") );
 282             strcpy( ld_command, target_alias );
 283             strcat( ld_command, "-ld" );
 284         }
 285         else
 286         {
 287             static const char * const commands[] = { "ld", "gld", NULL };
 288             if (!(ld_command = find_tool( commands ))) ld_command = xstrdup("ld");
 289         }
 290
 291         if (force_pointer_size)
 292         {
 293             const char *args = (target_platform == PLATFORM_APPLE) ?
 294                 ((force_pointer_size == 8) ? " -arch x86_64" : " -arch i386") :
 295                 ((force_pointer_size == 8) ? " -m elf_x86_64" : " -m elf_i386");
 296             ld_command = xrealloc( ld_command, strlen(ld_command) + strlen(args) + 1 );
 297             strcat( ld_command, args );
 298         }
 299     }
 300     return ld_command;
 301 }
 302
 303 const char *get_nm_command(void)
 304 {
 305     if (!nm_command)
 306     {
 307         if (target_alias)
 308         {
 309             nm_command = xmalloc( strlen(target_alias) + sizeof("-nm") );
 310             strcpy( nm_command, target_alias );
 311             strcat( nm_command, "-nm" );
 312         }
 313         else
 314         {
 315             static const char * const commands[] = { "nm", "gnm", NULL };
 316             if (!(nm_command = find_tool( commands ))) nm_command = xstrdup("nm");
 317         }
 318     }
 319     return nm_command;
 320 }
 321
 322 /* get a name for a temp file, automatically cleaned up on exit */
 323 char *get_temp_file_name( const char *prefix, const char *suffix )
 324 {
 325     char *name;
 326     const char *ext;
 327     int fd;
 328
 329     assert( nb_tmp_files < MAX_TMP_FILES );
 330     if (!nb_tmp_files && !save_temps) atexit( cleanup_tmp_files );
 331
 332     if (!prefix || !prefix[0]) prefix = "winebuild";
 333     if (!suffix) suffix = "";
 334     if (!(ext = strchr( prefix, '.' ))) ext = prefix + strlen(prefix);
 335     name = xmalloc( sizeof("/tmp/") + (ext - prefix) + sizeof(".XXXXXX") + strlen(suffix) );
 336     strcpy( name, "/tmp/" );
 337     memcpy( name + 5, prefix, ext - prefix );
 338     strcpy( name + 5 + (ext - prefix), ".XXXXXX" );
 339     strcat( name, suffix );
 340
 341     /* first try without the /tmp/ prefix */
 342     if ((fd = mkstemps( name + 5, strlen(suffix) )) != -1)
 343         name += 5;
 344     else if ((fd = mkstemps( name, strlen(suffix) )) == -1)
 345         fatal_error( "could not generate a temp file\n" );
 346
 347     close( fd );
 348     tmp_files[nb_tmp_files++] = name;
 349     return name;
 350 }
 351
 352 /* output a standard header for generated files */
 353 void output_standard_file_header(void)
 354 {
 355     if (spec_file_name)
 356         output( "/* File generated automatically from %s; do not edit! */\n", spec_file_name );
 357     else
 358         output( "/* File generated automatically; do not edit! */\n" );
 359     output( "/* This file can be copied, modified and distributed without restriction. */\n\n" );
 360 }
 361
 362 /* dump a byte stream into the assembly code */
 363 void dump_bytes( const void *buffer, unsigned int size )
 364 {
 365     unsigned int i;
 366     const unsigned char *ptr = buffer;
 367
 368     if (!size) return;
 369     output( "\t.byte " );
 370     for (i = 0; i < size - 1; i++, ptr++)
 371     {
 372         if ((i % 16) == 15) output( "0x%02x\n\t.byte ", *ptr );
 373         else output( "0x%02x,", *ptr );
 374     }
 375     output( "0x%02x\n", *ptr );
 376 }
 377
 378
 379 /*******************************************************************
 380  *         open_input_file
 381  *
 382  * Open a file in the given srcdir and set the input_file_name global variable.
 383  */
 384 FILE *open_input_file( const char *srcdir, const char *name )
 385 {
 386     char *fullname;
 387     FILE *file = fopen( name, "r" );
 388
 389     if (!file && srcdir)
 390     {
 391         fullname = xmalloc( strlen(srcdir) + strlen(name) + 2 );
 392         strcpy( fullname, srcdir );
 393         strcat( fullname, "/" );
 394         strcat( fullname, name );
 395         file = fopen( fullname, "r" );
 396     }
 397     else fullname = xstrdup( name );
 398
 399     if (!file) fatal_error( "Cannot open file '%s'\n", fullname );
 400     input_file_name = fullname;
 401     current_line = 1;
 402     return file;
 403 }
 404
 405
 406 /*******************************************************************
 407  *         close_input_file
 408  *
 409  * Close the current input file (must have been opened with open_input_file).
 410  */
 411 void close_input_file( FILE *file )
 412 {
 413     fclose( file );
 414     free( input_file_name );
 415     input_file_name = NULL;
 416     current_line = 0;
 417 }
 418
 419
 420 /*******************************************************************
 421  *         remove_stdcall_decoration
 422  *
 423  * Remove a possible @xx suffix from a function name.
 424  * Return the numerical value of the suffix, or -1 if none.
 425  */
 426 int remove_stdcall_decoration( char *name )
 427 {
 428     char *p, *end = strrchr( name, '@' );
 429     if (!end || !end[1] || end == name) return -1;
 430     /* make sure all the rest is digits */
 431     for (p = end + 1; *p; p++) if (!isdigit(*p)) return -1;
 432     *end = 0;
 433     return atoi( end + 1 );
 434 }
 435
 436
 437 /*******************************************************************
 438  *         assemble_file
 439  *
 440  * Run a file through the assembler.
 441  */
 442 void assemble_file( const char *src_file, const char *obj_file )
 443 {
 444     const char *prog = get_as_command();
 445     char *cmd;
 446     int err;
 447
 448     cmd = xmalloc( strlen(prog) + strlen(obj_file) + strlen(src_file) + 6 );
 449     sprintf( cmd, "%s -o %s %s", prog, obj_file, src_file );
 450     if (verbose) fprintf( stderr, "%s\n", cmd );
 451     err = system( cmd );
 452     if (err) fatal_error( "%s failed with status %d\n", prog, err );
 453     free( cmd );
 454 }
 455
 456
 457 /*******************************************************************
 458  *         alloc_dll_spec
 459  *
 460  * Create a new dll spec file descriptor
 461  */
 462 DLLSPEC *alloc_dll_spec(void)
 463 {
 464     DLLSPEC *spec;
 465
 466     spec = xmalloc( sizeof(*spec) );
 467     spec->file_name          = NULL;
 468     spec->dll_name           = NULL;
 469     spec->init_func          = NULL;
 470     spec->main_module        = NULL;
 471     spec->type               = SPEC_WIN32;
 472     spec->base               = MAX_ORDINALS;
 473     spec->limit              = 0;
 474     spec->stack_size         = 0;
 475     spec->heap_size          = 0;
 476     spec->nb_entry_points    = 0;
 477     spec->alloc_entry_points = 0;
 478     spec->nb_names           = 0;
 479     spec->nb_resources       = 0;
 480     spec->characteristics    = IMAGE_FILE_EXECUTABLE_IMAGE;
 481     if (get_ptr_size() > 4)
 482         spec->characteristics |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
 483     else
 484         spec->characteristics |= IMAGE_FILE_32BIT_MACHINE;
 485     spec->dll_characteristics = IMAGE_DLLCHARACTERISTICS_NX_COMPAT;
 486     spec->subsystem          = 0;
 487     spec->subsystem_major    = 4;
 488     spec->subsystem_minor    = 0;
 489     spec->entry_points       = NULL;
 490     spec->names              = NULL;
 491     spec->ordinals           = NULL;
 492     spec->resources          = NULL;
 493     return spec;
 494 }
 495
 496
 497 /*******************************************************************
 498  *         free_dll_spec
 499  *
 500  * Free dll spec file descriptor
 501  */
 502 void free_dll_spec( DLLSPEC *spec )
 503 {
 504     int i;
 505
 506     for (i = 0; i < spec->nb_entry_points; i++)
 507     {
 508         ORDDEF *odp = &spec->entry_points[i];
 509         free( odp->name );
 510         free( odp->export_name );
 511         free( odp->link_name );
 512     }
 513     free( spec->file_name );
 514     free( spec->dll_name );
 515     free( spec->init_func );
 516     free( spec->entry_points );
 517     free( spec->names );
 518     free( spec->ordinals );
 519     free( spec->resources );
 520     free( spec );
 521 }
 522
 523
 524 /*******************************************************************
 525  *         make_c_identifier
 526  *
 527  * Map a string to a valid C identifier.
 528  */
 529 const char *make_c_identifier( const char *str )
 530 {
 531     static char buffer[256];
 532     char *p;
 533
 534     for (p = buffer; *str && p < buffer+sizeof(buffer)-1; p++, str++)
 535     {
 536         if (isalnum(*str)) *p = *str;
 537         else *p = '_';
 538     }
 539     *p = 0;
 540     return buffer;
 541 }
 542
 543
 544 /*******************************************************************
 545  *         get_stub_name
 546  *
 547  * Generate an internal name for a stub entry point.
 548  */
 549 const char *get_stub_name( const ORDDEF *odp, const DLLSPEC *spec )
 550 {
 551     static char buffer[256];
 552     if (odp->name || odp->export_name)
 553     {
 554         char *p;
 555         sprintf( buffer, "__wine_stub_%s", odp->name ? odp->name : odp->export_name );
 556         /* make sure name is a legal C identifier */
 557         for (p = buffer; *p; p++) if (!isalnum(*p) && *p != '_') break;
 558         if (!*p) return buffer;
 559     }
 560     sprintf( buffer, "__wine_stub_%s_%d", make_c_identifier(spec->file_name), odp->ordinal );
 561     return buffer;
 562 }
 563
 564 /* parse a cpu name and return the corresponding value */
 565 enum target_cpu get_cpu_from_name( const char *name )
 566 {
 567     unsigned int i;
 568
 569     for (i = 0; i < sizeof(cpu_names)/sizeof(cpu_names[0]); i++)
 570         if (!strcmp( cpu_names[i].name, name )) return cpu_names[i].cpu;
 571     return -1;
 572 }
 573
 574 /*****************************************************************
 575  *  Function:    get_alignment
 576  *
 577  *  Description:
 578  *    According to the info page for gas, the .align directive behaves
 579  * differently on different systems.  On some architectures, the
 580  * argument of a .align directive is the number of bytes to pad to, so
 581  * to align on an 8-byte boundary you'd say
 582  *     .align 8
 583  * On other systems, the argument is "the number of low-order zero bits
 584  * that the location counter must have after advancement."  So to
 585  * align on an 8-byte boundary you'd say
 586  *     .align 3
 587  *
 588  * The reason gas is written this way is that it's trying to mimick
 589  * native assemblers for the various architectures it runs on.  gas
 590  * provides other directives that work consistently across
 591  * architectures, but of course we want to work on all arches with or
 592  * without gas.  Hence this function.
 593  *
 594  *
 595  *  Parameters:
 596  *    align  --  the number of bytes to align to. Must be a power of 2.
 597  */
 598 unsigned int get_alignment(unsigned int align)
 599 {
 600     unsigned int n;
 601
 602     assert( !(align & (align - 1)) );
 603
 604     switch(target_cpu)
 605     {
 606     case CPU_x86:
 607     case CPU_x86_64:
 608     case CPU_SPARC:
 609         if (target_platform != PLATFORM_APPLE) return align;
 610         /* fall through */
 611     case CPU_POWERPC:
 612     case CPU_ALPHA:
 613         n = 0;
 614         while ((1u << n) != align) n++;
 615         return n;
 616     }
 617     /* unreached */
 618     assert(0);
 619     return 0;
 620 }
 621
 622 /* return the page size for the target CPU */
 623 unsigned int get_page_size(void)
 624 {
 625     switch(target_cpu)
 626     {
 627     case CPU_x86:     return 4096;
 628     case CPU_x86_64:  return 4096;
 629     case CPU_POWERPC: return 4096;
 630     case CPU_SPARC:   return 8192;
 631     case CPU_ALPHA:   return 8192;
 632     }
 633     /* unreached */
 634     assert(0);
 635     return 0;
 636 }
 637
 638 /* return the size of a pointer on the target CPU */
 639 unsigned int get_ptr_size(void)
 640 {
 641     switch(target_cpu)
 642     {
 643     case CPU_x86:
 644     case CPU_POWERPC:
 645     case CPU_SPARC:
 646     case CPU_ALPHA:
 647         return 4;
 648     case CPU_x86_64:
 649         return 8;
 650     }
 651     /* unreached */
 652     assert(0);
 653     return 0;
 654 }
 655
 656 /* return the assembly name for a C symbol */
 657 const char *asm_name( const char *sym )
 658 {
 659     static char buffer[256];
 660
 661     switch (target_platform)
 662     {
 663     case PLATFORM_APPLE:
 664     case PLATFORM_WINDOWS:
 665         if (sym[0] == '.' && sym[1] == 'L') return sym;
 666         buffer[0] = '_';
 667         strcpy( buffer + 1, sym );
 668         return buffer;
 669     default:
 670         return sym;
 671     }
 672 }
 673
 674 /* return an assembly function declaration for a C function name */
 675 const char *func_declaration( const char *func )
 676 {
 677     static char buffer[256];
 678
 679     switch (target_platform)
 680     {
 681     case PLATFORM_APPLE:
 682         return "";
 683     case PLATFORM_WINDOWS:
 684         sprintf( buffer, ".def _%s; .scl 2; .type 32; .endef", func );
 685         break;
 686     default:
 687         sprintf( buffer, ".type %s,@function", func );
 688         break;
 689     }
 690     return buffer;
 691 }
 692
 693 /* output a size declaration for an assembly function */
 694 void output_function_size( const char *name )
 695 {
 696     switch (target_platform)
 697     {
 698     case PLATFORM_APPLE:
 699     case PLATFORM_WINDOWS:
 700         break;
 701     default:
 702         output( "\t.size %s, .-%s\n", name, name );
 703         break;
 704     }
 705 }
 706
 707 /* output the GNU note for non-exec stack */
 708 void output_gnu_stack_note(void)
 709 {
 710     switch (target_platform)
 711     {
 712     case PLATFORM_WINDOWS:
 713     case PLATFORM_APPLE:
 714         break;
 715     default:
 716         output( "\t.section .note.GNU-stack,\"\",@progbits\n" );
 717         break;
 718     }
 719 }
 720
 721 /* return a global symbol declaration for an assembly symbol */
 722 const char *asm_globl( const char *func )
 723 {
 724     static char buffer[256];
 725
 726     switch (target_platform)
 727     {
 728     case PLATFORM_APPLE:
 729         sprintf( buffer, "\t.globl _%s\n\t.private_extern _%s\n_%s:", func, func, func );
 730         return buffer;
 731     case PLATFORM_WINDOWS:
 732         sprintf( buffer, "\t.globl _%s\n_%s:", func, func );
 733         return buffer;
 734     default:
 735         sprintf( buffer, "\t.globl %s\n\t.hidden %s\n%s:", func, func, func );
 736         return buffer;
 737     }
 738 }
 739
 740 const char *get_asm_ptr_keyword(void)
 741 {
 742     switch(get_ptr_size())
 743     {
 744     case 4: return ".long";
 745     case 8: return ".quad";
 746     }
 747     assert(0);
 748     return NULL;
 749 }
 750
 751 const char *get_asm_string_keyword(void)
 752 {
 753     switch (target_platform)
 754     {
 755     case PLATFORM_APPLE:
 756         return ".asciz";
 757     default:
 758         return ".string";
 759     }
 760 }
 761
 762 const char *get_asm_short_keyword(void)
 763 {
 764     switch (target_platform)
 765     {
 766     default:            return ".short";
 767     }
 768 }
 769
 770 const char *get_asm_rodata_section(void)
 771 {
 772     switch (target_platform)
 773     {
 774     case PLATFORM_APPLE: return ".const";
 775     default:             return ".section .rodata";
 776     }
 777 }
 778
 779 const char *get_asm_string_section(void)
 780 {
 781     switch (target_platform)
 782     {
 783     case PLATFORM_APPLE: return ".cstring";
 784     default:             return ".section .rodata";
 785     }
 786 }