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 #ifdef HAVE_SYS_STAT_H
  34 # include <sys/stat.h>
  35 #endif
  36 #ifdef HAVE_SYS_MMAN_H
  37 #include <sys/mman.h>
  38 #endif
  39
  40 #include "build.h"
  41
  42 static const char **tmp_files;
  43 static unsigned int nb_tmp_files;
  44 static unsigned int max_tmp_files;
  45
  46 static const struct
  47 {
  48     const char *name;
  49     enum target_cpu cpu;
  50 } cpu_names[] =
  51 {
  52     { "i386",    CPU_x86 },
  53     { "i486",    CPU_x86 },
  54     { "i586",    CPU_x86 },
  55     { "i686",    CPU_x86 },
  56     { "i786",    CPU_x86 },
  57     { "amd64",   CPU_x86_64 },
  58     { "x86_64",  CPU_x86_64 },
  59     { "sparc",   CPU_SPARC },
  60     { "powerpc", CPU_POWERPC },
  61     { "arm", CPU_ARM }
  62 };
  63
  64 /* atexit handler to clean tmp files */
  65 static void cleanup_tmp_files(void)
  66 {
  67     unsigned int i;
  68     for (i = 0; i < nb_tmp_files; i++) if (tmp_files[i]) unlink( tmp_files[i] );
  69 }
  70
  71
  72 void *xmalloc (size_t size)
  73 {
  74     void *res;
  75
  76     res = malloc (size ? size : 1);
  77     if (res == NULL)
  78     {
  79         fprintf (stderr, "Virtual memory exhausted.\n");
  80         exit (1);
  81     }
  82     return res;
  83 }
  84
  85 void *xrealloc (void *ptr, size_t size)
  86 {
  87     void *res = realloc (ptr, size);
  88     if (size && res == NULL)
  89     {
  90         fprintf (stderr, "Virtual memory exhausted.\n");
  91         exit (1);
  92     }
  93     return res;
  94 }
  95
  96 char *xstrdup( const char *str )
  97 {
  98     char *res = strdup( str );
  99     if (!res)
 100     {
 101         fprintf (stderr, "Virtual memory exhausted.\n");
 102         exit (1);
 103     }
 104     return res;
 105 }
 106
 107 char *strupper(char *s)
 108 {
 109     char *p;
 110     for (p = s; *p; p++) *p = toupper(*p);
 111     return s;
 112 }
 113
 114 int strendswith(const char* str, const char* end)
 115 {
 116     int l = strlen(str);
 117     int m = strlen(end);
 118     return l >= m && strcmp(str + l - m, end) == 0;
 119 }
 120
 121 char *strmake( const char* fmt, ... )
 122 {
 123     int n;
 124     size_t size = 100;
 125     va_list ap;
 126
 127     for (;;)
 128     {
 129         char *p = xmalloc( size );
 130         va_start( ap, fmt );
 131         n = vsnprintf( p, size, fmt, ap );
 132         va_end( ap );
 133         if (n == -1) size *= 2;
 134         else if ((size_t)n >= size) size = n + 1;
 135         else return p;
 136         free( p );
 137     }
 138 }
 139
 140 struct strarray *strarray_init(void)
 141 {
 142     struct strarray *array = xmalloc( sizeof(*array) );
 143     array->count = 0;
 144     array->max = 16;
 145     array->str = xmalloc( array->max * sizeof(*array->str) );
 146     return array;
 147 }
 148
 149 static void strarray_add_one( struct strarray *array, const char *str )
 150 {
 151     if (array->count == array->max)
 152     {
 153         array->max *= 2;
 154         array->str = xrealloc( array->str, array->max * sizeof(*array->str) );
 155     }
 156     array->str[array->count++] = str;
 157 }
 158
 159 void strarray_add( struct strarray *array, ... )
 160 {
 161     va_list valist;
 162     const char *str;
 163
 164     va_start( valist, array );
 165     while ((str = va_arg( valist, const char *))) strarray_add_one( array, str );
 166     va_end( valist );
 167 }
 168
 169 void strarray_addv( struct strarray *array, char * const *argv )
 170 {
 171     while (*argv) strarray_add_one( array, *argv++ );
 172 }
 173
 174 void strarray_free( struct strarray *array )
 175 {
 176     free( array->str );
 177     free( array );
 178 }
 179
 180 void fatal_error( const char *msg, ... )
 181 {
 182     va_list valist;
 183     va_start( valist, msg );
 184     if (input_file_name)
 185     {
 186         fprintf( stderr, "%s:", input_file_name );
 187         if (current_line)
 188             fprintf( stderr, "%d:", current_line );
 189         fputc( ' ', stderr );
 190     }
 191     else fprintf( stderr, "winebuild: " );
 192     vfprintf( stderr, msg, valist );
 193     va_end( valist );
 194     exit(1);
 195 }
 196
 197 void fatal_perror( const char *msg, ... )
 198 {
 199     va_list valist;
 200     va_start( valist, msg );
 201     if (input_file_name)
 202     {
 203         fprintf( stderr, "%s:", input_file_name );
 204         if (current_line)
 205             fprintf( stderr, "%d:", current_line );
 206         fputc( ' ', stderr );
 207     }
 208     vfprintf( stderr, msg, valist );
 209     perror( " " );
 210     va_end( valist );
 211     exit(1);
 212 }
 213
 214 void error( const char *msg, ... )
 215 {
 216     va_list valist;
 217     va_start( valist, msg );
 218     if (input_file_name)
 219     {
 220         fprintf( stderr, "%s:", input_file_name );
 221         if (current_line)
 222             fprintf( stderr, "%d:", current_line );
 223         fputc( ' ', stderr );
 224     }
 225     vfprintf( stderr, msg, valist );
 226     va_end( valist );
 227     nb_errors++;
 228 }
 229
 230 void warning( const char *msg, ... )
 231 {
 232     va_list valist;
 233
 234     if (!display_warnings) return;
 235     va_start( valist, msg );
 236     if (input_file_name)
 237     {
 238         fprintf( stderr, "%s:", input_file_name );
 239         if (current_line)
 240             fprintf( stderr, "%d:", current_line );
 241         fputc( ' ', stderr );
 242     }
 243     fprintf( stderr, "warning: " );
 244     vfprintf( stderr, msg, valist );
 245     va_end( valist );
 246 }
 247
 248 int output( const char *format, ... )
 249 {
 250     int ret;
 251     va_list valist;
 252
 253     va_start( valist, format );
 254     ret = vfprintf( output_file, format, valist );
 255     va_end( valist );
 256     if (ret < 0) fatal_perror( "Output error" );
 257     return ret;
 258 }
 259
 260 void spawn( struct strarray *args )
 261 {
 262     unsigned int i;
 263     int status;
 264
 265     strarray_add_one( args, NULL );
 266     if (verbose)
 267         for (i = 0; args->str[i]; i++)
 268             fprintf( stderr, "%s%c", args->str[i], args->str[i+1] ? ' ' : '\n' );
 269
 270     if ((status = spawnvp( _P_WAIT, args->str[0], args->str )))
 271     {
 272         if (status > 0) fatal_error( "%s failed with status %u\n", args->str[0], status );
 273         else fatal_perror( "winebuild" );
 274         exit( 1 );
 275     }
 276 }
 277
 278 /* find a build tool in the path, trying the various names */
 279 char *find_tool( const char *name, const char * const *names )
 280 {
 281     static char **dirs;
 282     static unsigned int count, maxlen;
 283
 284     char *p, *file;
 285     const char *alt_names[2];
 286     unsigned int i, len;
 287     struct stat st;
 288
 289     if (target_alias) return strmake( "%s-%s", target_alias, name );
 290
 291     if (!dirs)
 292     {
 293         char *path;
 294
 295         /* split the path in directories */
 296
 297         if (!getenv( "PATH" )) return NULL;
 298         path = xstrdup( getenv( "PATH" ));
 299         for (p = path, count = 2; *p; p++) if (*p == ':') count++;
 300         dirs = xmalloc( count * sizeof(*dirs) );
 301         count = 0;
 302         dirs[count++] = p = path;
 303         while (*p)
 304         {
 305             while (*p && *p != ':') p++;
 306             if (!*p) break;
 307             *p++ = 0;
 308             dirs[count++] = p;
 309         }
 310         for (i = 0; i < count; i++) maxlen = max( maxlen, strlen(dirs[i])+2 );
 311     }
 312
 313     if (!names)
 314     {
 315         alt_names[0] = name;
 316         alt_names[1] = NULL;
 317         names = alt_names;
 318     }
 319
 320     while (*names)
 321     {
 322         len = strlen(*names) + sizeof(EXEEXT) + 1;
 323         file = xmalloc( maxlen + len );
 324
 325         for (i = 0; i < count; i++)
 326         {
 327             strcpy( file, dirs[i] );
 328             p = file + strlen(file);
 329             if (p == file) *p++ = '.';
 330             if (p[-1] != '/') *p++ = '/';
 331             strcpy( p, *names );
 332             strcat( p, EXEEXT );
 333
 334             if (!stat( file, &st ) && S_ISREG(st.st_mode) && (st.st_mode & 0111)) return file;
 335         }
 336         free( file );
 337         names++;
 338     }
 339     return xstrdup( name );
 340 }
 341
 342 struct strarray *get_as_command(void)
 343 {
 344     struct strarray *args = strarray_init();
 345
 346     if (!as_command)
 347     {
 348         static const char * const commands[] = { "gas", "as", NULL };
 349         as_command = find_tool( "as", commands );
 350     }
 351     strarray_add_one( args, as_command );
 352
 353     if (force_pointer_size)
 354     {
 355         switch (target_platform)
 356         {
 357         case PLATFORM_APPLE:
 358             strarray_add( args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
 359             break;
 360         default:
 361             strarray_add_one( args, (force_pointer_size == 8) ? "--64" : "--32" );
 362             break;
 363         }
 364     }
 365
 366     if (cpu_option) strarray_add_one( args, strmake("-mcpu=%s", cpu_option) );
 367     return args;
 368 }
 369
 370 struct strarray *get_ld_command(void)
 371 {
 372     struct strarray *args = strarray_init();
 373
 374     if (!ld_command)
 375     {
 376         static const char * const commands[] = { "ld", "gld", NULL };
 377         ld_command = find_tool( "ld", commands );
 378     }
 379     strarray_add_one( args, ld_command );
 380
 381     if (force_pointer_size)
 382     {
 383         switch (target_platform)
 384         {
 385         case PLATFORM_APPLE:
 386             strarray_add( args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
 387             break;
 388         case PLATFORM_FREEBSD:
 389             strarray_add( args, "-m", (force_pointer_size == 8) ? "elf_x86_64_fbsd" : "elf_i386_fbsd", NULL );
 390             break;
 391         default:
 392             strarray_add( args, "-m", (force_pointer_size == 8) ? "elf_x86_64" : "elf_i386", NULL );
 393             break;
 394         }
 395     }
 396     return args;
 397 }
 398
 399 const char *get_nm_command(void)
 400 {
 401     if (!nm_command)
 402     {
 403         static const char * const commands[] = { "nm", "gnm", NULL };
 404         nm_command = find_tool( "nm", commands );
 405     }
 406     return nm_command;
 407 }
 408
 409 /* get a name for a temp file, automatically cleaned up on exit */
 410 char *get_temp_file_name( const char *prefix, const char *suffix )
 411 {
 412     char *name;
 413     const char *ext, *basename;
 414     int fd;
 415
 416     if (!nb_tmp_files && !save_temps) atexit( cleanup_tmp_files );
 417
 418     if (!prefix || !prefix[0]) prefix = "winebuild";
 419     if (!suffix) suffix = "";
 420     if ((basename = strrchr( prefix, '/' ))) basename++;
 421     else basename = prefix;
 422     if (!(ext = strchr( basename, '.' ))) ext = prefix + strlen(prefix);
 423     name = xmalloc( sizeof("/tmp/") + (ext - prefix) + sizeof(".XXXXXX") + strlen(suffix) );
 424     memcpy( name, prefix, ext - prefix );
 425     strcpy( name + (ext - prefix), ".XXXXXX" );
 426     strcat( name, suffix );
 427
 428     if ((fd = mkstemps( name, strlen(suffix) )) == -1)
 429     {
 430         strcpy( name, "/tmp/" );
 431         memcpy( name + 5, basename, ext - basename );
 432         strcpy( name + 5 + (ext - basename), ".XXXXXX" );
 433         strcat( name, suffix );
 434         if ((fd = mkstemps( name, strlen(suffix) )) == -1)
 435             fatal_error( "could not generate a temp file\n" );
 436     }
 437
 438     close( fd );
 439     if (nb_tmp_files >= max_tmp_files)
 440     {
 441         max_tmp_files = max( 2 * max_tmp_files, 8 );
 442         tmp_files = xrealloc( tmp_files, max_tmp_files * sizeof(tmp_files[0]) );
 443     }
 444     tmp_files[nb_tmp_files++] = name;
 445     return name;
 446 }
 447
 448 /*******************************************************************
 449  *         buffer management
 450  *
 451  * Function for reading from/writing to a memory buffer.
 452  */
 453
 454 int byte_swapped = 0;
 455 const char *input_buffer_filename;
 456 const unsigned char *input_buffer;
 457 size_t input_buffer_pos;
 458 size_t input_buffer_size;
 459 unsigned char *output_buffer;
 460 size_t output_buffer_pos;
 461 size_t output_buffer_size;
 462
 463 static void check_output_buffer_space( size_t size )
 464 {
 465     if (output_buffer_pos + size >= output_buffer_size)
 466     {
 467         output_buffer_size = max( output_buffer_size * 2, output_buffer_pos + size );
 468         output_buffer = xrealloc( output_buffer, output_buffer_size );
 469     }
 470 }
 471
 472 void init_input_buffer( const char *file )
 473 {
 474     int fd;
 475     struct stat st;
 476
 477     if ((fd = open( file, O_RDONLY | O_BINARY )) == -1) fatal_perror( "Cannot open %s", file );
 478     if ((fstat( fd, &st ) == -1)) fatal_perror( "Cannot stat %s", file );
 479     if (!st.st_size) fatal_error( "%s is an empty file\n", file );
 480 #ifdef  HAVE_MMAP
 481     if ((input_buffer = mmap( NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0 )) == (void*)-1)
 482 #endif
 483     {
 484         unsigned char *buffer = xmalloc( st.st_size );
 485         if (read( fd, buffer, st.st_size ) != st.st_size) fatal_error( "Cannot read %s\n", file );
 486         input_buffer = buffer;
 487     }
 488     close( fd );
 489     input_buffer_filename = xstrdup( file );
 490     input_buffer_size = st.st_size;
 491     input_buffer_pos = 0;
 492     byte_swapped = 0;
 493 }
 494
 495 void init_output_buffer(void)
 496 {
 497     output_buffer_size = 1024;
 498     output_buffer_pos = 0;
 499     output_buffer = xmalloc( output_buffer_size );
 500 }
 501
 502 void flush_output_buffer(void)
 503 {
 504     if (fwrite( output_buffer, 1, output_buffer_pos, output_file ) != output_buffer_pos)
 505         fatal_error( "Error writing to %s\n", output_file_name );
 506     free( output_buffer );
 507 }
 508
 509 unsigned char get_byte(void)
 510 {
 511     if (input_buffer_pos >= input_buffer_size)
 512         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 513     return input_buffer[input_buffer_pos++];
 514 }
 515
 516 unsigned short get_word(void)
 517 {
 518     unsigned short ret;
 519
 520     if (input_buffer_pos + sizeof(ret) > input_buffer_size)
 521         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 522     memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
 523     if (byte_swapped) ret = (ret << 8) | (ret >> 8);
 524     input_buffer_pos += sizeof(ret);
 525     return ret;
 526 }
 527
 528 unsigned int get_dword(void)
 529 {
 530     unsigned int ret;
 531
 532     if (input_buffer_pos + sizeof(ret) > input_buffer_size)
 533         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 534     memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
 535     if (byte_swapped)
 536         ret = ((ret << 24) | ((ret << 8) & 0x00ff0000) | ((ret >> 8) & 0x0000ff00) | (ret >> 24));
 537     input_buffer_pos += sizeof(ret);
 538     return ret;
 539 }
 540
 541 void put_data( const void *data, size_t size )
 542 {
 543     check_output_buffer_space( size );
 544     memcpy( output_buffer + output_buffer_pos, data, size );
 545     output_buffer_pos += size;
 546 }
 547
 548 void put_byte( unsigned char val )
 549 {
 550     check_output_buffer_space( 1 );
 551     output_buffer[output_buffer_pos++] = val;
 552 }
 553
 554 void put_word( unsigned short val )
 555 {
 556     if (byte_swapped) val = (val << 8) | (val >> 8);
 557     put_data( &val, sizeof(val) );
 558 }
 559
 560 void put_dword( unsigned int val )
 561 {
 562     if (byte_swapped)
 563         val = ((val << 24) | ((val << 8) & 0x00ff0000) | ((val >> 8) & 0x0000ff00) | (val >> 24));
 564     put_data( &val, sizeof(val) );
 565 }
 566
 567 void put_qword( unsigned int val )
 568 {
 569     if (byte_swapped)
 570     {
 571         put_dword( 0 );
 572         put_dword( val );
 573     }
 574     else
 575     {
 576         put_dword( val );
 577         put_dword( 0 );
 578     }
 579 }
 580
 581 /* pointer-sized word */
 582 void put_pword( unsigned int val )
 583 {
 584     if (get_ptr_size() == 8) put_qword( val );
 585     else put_dword( val );
 586 }
 587
 588 void align_output( unsigned int align )
 589 {
 590     size_t size = align - (output_buffer_pos % align);
 591
 592     if (size == align) return;
 593     check_output_buffer_space( size );
 594     memset( output_buffer + output_buffer_pos, 0, size );
 595     output_buffer_pos += size;
 596 }
 597
 598 /* output a standard header for generated files */
 599 void output_standard_file_header(void)
 600 {
 601     if (spec_file_name)
 602         output( "/* File generated automatically from %s; do not edit! */\n", spec_file_name );
 603     else
 604         output( "/* File generated automatically; do not edit! */\n" );
 605     output( "/* This file can be copied, modified and distributed without restriction. */\n\n" );
 606 }
 607
 608 /* dump a byte stream into the assembly code */
 609 void dump_bytes( const void *buffer, unsigned int size )
 610 {
 611     unsigned int i;
 612     const unsigned char *ptr = buffer;
 613
 614     if (!size) return;
 615     output( "\t.byte " );
 616     for (i = 0; i < size - 1; i++, ptr++)
 617     {
 618         if ((i % 16) == 15) output( "0x%02x\n\t.byte ", *ptr );
 619         else output( "0x%02x,", *ptr );
 620     }
 621     output( "0x%02x\n", *ptr );
 622 }
 623
 624
 625 /*******************************************************************
 626  *         open_input_file
 627  *
 628  * Open a file in the given srcdir and set the input_file_name global variable.
 629  */
 630 FILE *open_input_file( const char *srcdir, const char *name )
 631 {
 632     char *fullname;
 633     FILE *file = fopen( name, "r" );
 634
 635     if (!file && srcdir)
 636     {
 637         fullname = strmake( "%s/%s", srcdir, name );
 638         file = fopen( fullname, "r" );
 639     }
 640     else fullname = xstrdup( name );
 641
 642     if (!file) fatal_error( "Cannot open file '%s'\n", fullname );
 643     input_file_name = fullname;
 644     current_line = 1;
 645     return file;
 646 }
 647
 648
 649 /*******************************************************************
 650  *         close_input_file
 651  *
 652  * Close the current input file (must have been opened with open_input_file).
 653  */
 654 void close_input_file( FILE *file )
 655 {
 656     fclose( file );
 657     free( input_file_name );
 658     input_file_name = NULL;
 659     current_line = 0;
 660 }
 661
 662
 663 /*******************************************************************
 664  *         remove_stdcall_decoration
 665  *
 666  * Remove a possible @xx suffix from a function name.
 667  * Return the numerical value of the suffix, or -1 if none.
 668  */
 669 int remove_stdcall_decoration( char *name )
 670 {
 671     char *p, *end = strrchr( name, '@' );
 672     if (!end || !end[1] || end == name) return -1;
 673     if (target_cpu != CPU_x86) return -1;
 674     /* make sure all the rest is digits */
 675     for (p = end + 1; *p; p++) if (!isdigit(*p)) return -1;
 676     *end = 0;
 677     return atoi( end + 1 );
 678 }
 679
 680
 681 /*******************************************************************
 682  *         assemble_file
 683  *
 684  * Run a file through the assembler.
 685  */
 686 void assemble_file( const char *src_file, const char *obj_file )
 687 {
 688     struct strarray *args = get_as_command();
 689     strarray_add( args, "-o", obj_file, src_file, NULL );
 690     spawn( args );
 691     strarray_free( args );
 692 }
 693
 694
 695 /*******************************************************************
 696  *         alloc_dll_spec
 697  *
 698  * Create a new dll spec file descriptor
 699  */
 700 DLLSPEC *alloc_dll_spec(void)
 701 {
 702     DLLSPEC *spec;
 703
 704     spec = xmalloc( sizeof(*spec) );
 705     spec->file_name          = NULL;
 706     spec->dll_name           = NULL;
 707     spec->init_func          = NULL;
 708     spec->main_module        = NULL;
 709     spec->type               = SPEC_WIN32;
 710     spec->base               = MAX_ORDINALS;
 711     spec->limit              = 0;
 712     spec->stack_size         = 0;
 713     spec->heap_size          = 0;
 714     spec->nb_entry_points    = 0;
 715     spec->alloc_entry_points = 0;
 716     spec->nb_names           = 0;
 717     spec->nb_resources       = 0;
 718     spec->characteristics    = IMAGE_FILE_EXECUTABLE_IMAGE;
 719     if (get_ptr_size() > 4)
 720         spec->characteristics |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
 721     else
 722         spec->characteristics |= IMAGE_FILE_32BIT_MACHINE;
 723     spec->dll_characteristics = IMAGE_DLLCHARACTERISTICS_NX_COMPAT;
 724     spec->subsystem          = 0;
 725     spec->subsystem_major    = 4;
 726     spec->subsystem_minor    = 0;
 727     spec->entry_points       = NULL;
 728     spec->names              = NULL;
 729     spec->ordinals           = NULL;
 730     spec->resources          = NULL;
 731     return spec;
 732 }
 733
 734
 735 /*******************************************************************
 736  *         free_dll_spec
 737  *
 738  * Free dll spec file descriptor
 739  */
 740 void free_dll_spec( DLLSPEC *spec )
 741 {
 742     int i;
 743
 744     for (i = 0; i < spec->nb_entry_points; i++)
 745     {
 746         ORDDEF *odp = &spec->entry_points[i];
 747         free( odp->name );
 748         free( odp->export_name );
 749         free( odp->link_name );
 750     }
 751     free( spec->file_name );
 752     free( spec->dll_name );
 753     free( spec->init_func );
 754     free( spec->entry_points );
 755     free( spec->names );
 756     free( spec->ordinals );
 757     free( spec->resources );
 758     free( spec );
 759 }
 760
 761
 762 /*******************************************************************
 763  *         make_c_identifier
 764  *
 765  * Map a string to a valid C identifier.
 766  */
 767 const char *make_c_identifier( const char *str )
 768 {
 769     static char buffer[256];
 770     char *p;
 771
 772     for (p = buffer; *str && p < buffer+sizeof(buffer)-1; p++, str++)
 773     {
 774         if (isalnum(*str)) *p = *str;
 775         else *p = '_';
 776     }
 777     *p = 0;
 778     return buffer;
 779 }
 780
 781
 782 /*******************************************************************
 783  *         get_stub_name
 784  *
 785  * Generate an internal name for a stub entry point.
 786  */
 787 const char *get_stub_name( const ORDDEF *odp, const DLLSPEC *spec )
 788 {
 789     static char *buffer;
 790
 791     free( buffer );
 792     if (odp->name || odp->export_name)
 793     {
 794         char *p;
 795         buffer = strmake( "__wine_stub_%s", odp->name ? odp->name : odp->export_name );
 796         /* make sure name is a legal C identifier */
 797         for (p = buffer; *p; p++) if (!isalnum(*p) && *p != '_') break;
 798         if (!*p) return buffer;
 799         free( buffer );
 800     }
 801     buffer = strmake( "__wine_stub_%s_%d", make_c_identifier(spec->file_name), odp->ordinal );
 802     return buffer;
 803 }
 804
 805 /* parse a cpu name and return the corresponding value */
 806 enum target_cpu get_cpu_from_name( const char *name )
 807 {
 808     unsigned int i;
 809
 810     for (i = 0; i < sizeof(cpu_names)/sizeof(cpu_names[0]); i++)
 811         if (!strcmp( cpu_names[i].name, name )) return cpu_names[i].cpu;
 812     return -1;
 813 }
 814
 815 /*****************************************************************
 816  *  Function:    get_alignment
 817  *
 818  *  Description:
 819  *    According to the info page for gas, the .align directive behaves
 820  * differently on different systems.  On some architectures, the
 821  * argument of a .align directive is the number of bytes to pad to, so
 822  * to align on an 8-byte boundary you'd say
 823  *     .align 8
 824  * On other systems, the argument is "the number of low-order zero bits
 825  * that the location counter must have after advancement."  So to
 826  * align on an 8-byte boundary you'd say
 827  *     .align 3
 828  *
 829  * The reason gas is written this way is that it's trying to mimick
 830  * native assemblers for the various architectures it runs on.  gas
 831  * provides other directives that work consistently across
 832  * architectures, but of course we want to work on all arches with or
 833  * without gas.  Hence this function.
 834  *
 835  *
 836  *  Parameters:
 837  *    align  --  the number of bytes to align to. Must be a power of 2.
 838  */
 839 unsigned int get_alignment(unsigned int align)
 840 {
 841     unsigned int n;
 842
 843     assert( !(align & (align - 1)) );
 844
 845     switch(target_cpu)
 846     {
 847     case CPU_x86:
 848     case CPU_x86_64:
 849     case CPU_SPARC:
 850         if (target_platform != PLATFORM_APPLE) return align;
 851         /* fall through */
 852     case CPU_POWERPC:
 853     case CPU_ARM:
 854         n = 0;
 855         while ((1u << n) != align) n++;
 856         return n;
 857     }
 858     /* unreached */
 859     assert(0);
 860     return 0;
 861 }
 862
 863 /* return the page size for the target CPU */
 864 unsigned int get_page_size(void)
 865 {
 866     switch(target_cpu)
 867     {
 868     case CPU_x86:     return 4096;
 869     case CPU_x86_64:  return 4096;
 870     case CPU_POWERPC: return 4096;
 871     case CPU_ARM:     return 4096;
 872     case CPU_SPARC:   return 8192;
 873     }
 874     /* unreached */
 875     assert(0);
 876     return 0;
 877 }
 878
 879 /* return the size of a pointer on the target CPU */
 880 unsigned int get_ptr_size(void)
 881 {
 882     switch(target_cpu)
 883     {
 884     case CPU_x86:
 885     case CPU_POWERPC:
 886     case CPU_SPARC:
 887     case CPU_ARM:
 888         return 4;
 889     case CPU_x86_64:
 890         return 8;
 891     }
 892     /* unreached */
 893     assert(0);
 894     return 0;
 895 }
 896
 897 /* return the total size in bytes of the arguments on the stack */
 898 unsigned int get_args_size( const ORDDEF *odp )
 899 {
 900     int i, size;
 901
 902     for (i = size = 0; i < odp->u.func.nb_args; i++)
 903     {
 904         switch (odp->u.func.args[i])
 905         {
 906         case ARG_INT64:
 907         case ARG_DOUBLE:
 908             size += 8;
 909             break;
 910         case ARG_INT128:
 911             /* int128 is passed as pointer on x86_64 */
 912             if (target_cpu != CPU_x86_64)
 913             {
 914                 size += 16;
 915                 break;
 916             }
 917             /* fall through */
 918         default:
 919             size += get_ptr_size();
 920             break;
 921         }
 922     }
 923     return size;
 924 }
 925
 926 /* return the assembly name for a C symbol */
 927 const char *asm_name( const char *sym )
 928 {
 929     static char *buffer;
 930
 931     switch (target_platform)
 932     {
 933     case PLATFORM_APPLE:
 934     case PLATFORM_WINDOWS:
 935         if (sym[0] == '.' && sym[1] == 'L') return sym;
 936         free( buffer );
 937         buffer = strmake( "_%s", sym );
 938         return buffer;
 939     default:
 940         return sym;
 941     }
 942 }
 943
 944 /* return an assembly function declaration for a C function name */
 945 const char *func_declaration( const char *func )
 946 {
 947     static char *buffer;
 948
 949     switch (target_platform)
 950     {
 951     case PLATFORM_APPLE:
 952         return "";
 953     case PLATFORM_WINDOWS:
 954         free( buffer );
 955         buffer = strmake( ".def _%s; .scl 2; .type 32; .endef", func );
 956         break;
 957     default:
 958         free( buffer );
 959         switch(target_cpu)
 960         {
 961         case CPU_ARM:
 962             buffer = strmake( ".type %s,%%function", func );
 963             break;
 964         default:
 965             buffer = strmake( ".type %s,@function", func );
 966             break;
 967         }
 968         break;
 969     }
 970     return buffer;
 971 }
 972
 973 /* output a size declaration for an assembly function */
 974 void output_function_size( const char *name )
 975 {
 976     switch (target_platform)
 977     {
 978     case PLATFORM_APPLE:
 979     case PLATFORM_WINDOWS:
 980         break;
 981     default:
 982         output( "\t.size %s, .-%s\n", name, name );
 983         break;
 984     }
 985 }
 986
 987 /* output a .cfi directive */
 988 void output_cfi( const char *format, ... )
 989 {
 990     va_list valist;
 991
 992     if (!unwind_tables) return;
 993     va_start( valist, format );
 994     fputc( '\t', output_file );
 995     vfprintf( output_file, format, valist );
 996     fputc( '\n', output_file );
 997     va_end( valist );
 998 }
 999
1000 /* output the GNU note for non-exec stack */
1001 void output_gnu_stack_note(void)
1002 {
1003     switch (target_platform)
1004     {
1005     case PLATFORM_WINDOWS:
1006     case PLATFORM_APPLE:
1007         break;
1008     default:
1009         switch(target_cpu)
1010         {
1011         case CPU_ARM:
1012             output( "\t.section .note.GNU-stack,\"\",%%progbits\n" );
1013             break;
1014         default:
1015             output( "\t.section .note.GNU-stack,\"\",@progbits\n" );
1016             break;
1017         }
1018         break;
1019     }
1020 }
1021
1022 /* return a global symbol declaration for an assembly symbol */
1023 const char *asm_globl( const char *func )
1024 {
1025     static char *buffer;
1026
1027     free( buffer );
1028     switch (target_platform)
1029     {
1030     case PLATFORM_APPLE:
1031         buffer = strmake( "\t.globl _%s\n\t.private_extern _%s\n_%s:", func, func, func );
1032         break;
1033     case PLATFORM_WINDOWS:
1034         buffer = strmake( "\t.globl _%s\n_%s:", func, func );
1035         break;
1036     default:
1037         buffer = strmake( "\t.globl %s\n\t.hidden %s\n%s:", func, func, func );
1038         break;
1039     }
1040     return buffer;
1041 }
1042
1043 const char *get_asm_ptr_keyword(void)
1044 {
1045     switch(get_ptr_size())
1046     {
1047     case 4: return ".long";
1048     case 8: return ".quad";
1049     }
1050     assert(0);
1051     return NULL;
1052 }
1053
1054 const char *get_asm_string_keyword(void)
1055 {
1056     switch (target_platform)
1057     {
1058     case PLATFORM_APPLE:
1059         return ".asciz";
1060     default:
1061         return ".string";
1062     }
1063 }
1064
1065 const char *get_asm_short_keyword(void)
1066 {
1067     switch (target_platform)
1068     {
1069     default:            return ".short";
1070     }
1071 }
1072
1073 const char *get_asm_rodata_section(void)
1074 {
1075     switch (target_platform)
1076     {
1077     case PLATFORM_APPLE: return ".const";
1078     default:             return ".section .rodata";
1079     }
1080 }
1081
1082 const char *get_asm_string_section(void)
1083 {
1084     switch (target_platform)
1085     {
1086     case PLATFORM_APPLE: return ".cstring";
1087     default:             return ".section .rodata";
1088     }
1089 }