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 #if defined(_WIN32) && !defined(__CYGWIN__)
  43 # define PATH_SEPARATOR ';'
  44 #else
  45 # define PATH_SEPARATOR ':'
  46 #endif
  47
  48 static const char **tmp_files;
  49 static unsigned int nb_tmp_files;
  50 static unsigned int max_tmp_files;
  51
  52 static const struct
  53 {
  54     const char *name;
  55     enum target_cpu cpu;
  56 } cpu_names[] =
  57 {
  58     { "i386",    CPU_x86 },
  59     { "i486",    CPU_x86 },
  60     { "i586",    CPU_x86 },
  61     { "i686",    CPU_x86 },
  62     { "i786",    CPU_x86 },
  63     { "amd64",   CPU_x86_64 },
  64     { "x86_64",  CPU_x86_64 },
  65     { "powerpc", CPU_POWERPC },
  66     { "arm",     CPU_ARM },
  67     { "arm64",   CPU_ARM64 },
  68     { "aarch64", CPU_ARM64 },
  69 };
  70
  71 /* atexit handler to clean tmp files */
  72 void cleanup_tmp_files(void)
  73 {
  74     unsigned int i;
  75     for (i = 0; i < nb_tmp_files; i++) if (tmp_files[i]) unlink( tmp_files[i] );
  76 }
  77
  78
  79 void *xmalloc (size_t size)
  80 {
  81     void *res;
  82
  83     res = malloc (size ? size : 1);
  84     if (res == NULL)
  85     {
  86         fprintf (stderr, "Virtual memory exhausted.\n");
  87         exit (1);
  88     }
  89     return res;
  90 }
  91
  92 void *xrealloc (void *ptr, size_t size)
  93 {
  94     void *res = realloc (ptr, size);
  95     if (size && res == NULL)
  96     {
  97         fprintf (stderr, "Virtual memory exhausted.\n");
  98         exit (1);
  99     }
 100     return res;
 101 }
 102
 103 char *xstrdup( const char *str )
 104 {
 105     char *res = strdup( str );
 106     if (!res)
 107     {
 108         fprintf (stderr, "Virtual memory exhausted.\n");
 109         exit (1);
 110     }
 111     return res;
 112 }
 113
 114 char *strupper(char *s)
 115 {
 116     char *p;
 117     for (p = s; *p; p++) *p = toupper(*p);
 118     return s;
 119 }
 120
 121 int strendswith(const char* str, const char* end)
 122 {
 123     int l = strlen(str);
 124     int m = strlen(end);
 125     return l >= m && strcmp(str + l - m, end) == 0;
 126 }
 127
 128 char *strmake( const char* fmt, ... )
 129 {
 130     int n;
 131     size_t size = 100;
 132     va_list ap;
 133
 134     for (;;)
 135     {
 136         char *p = xmalloc( size );
 137         va_start( ap, fmt );
 138         n = vsnprintf( p, size, fmt, ap );
 139         va_end( ap );
 140         if (n == -1) size *= 2;
 141         else if ((size_t)n >= size) size = n + 1;
 142         else return p;
 143         free( p );
 144     }
 145 }
 146
 147 static struct strarray *strarray_init( const char *str )
 148 {
 149     struct strarray *array = xmalloc( sizeof(*array) );
 150     array->count = 0;
 151     array->max = 16;
 152     array->str = xmalloc( array->max * sizeof(*array->str) );
 153     if (str) array->str[array->count++] = str;
 154     return array;
 155 }
 156
 157 static struct strarray *strarray_copy( const struct strarray *src )
 158 {
 159     struct strarray *array = xmalloc( sizeof(*array) );
 160     array->count = src->count;
 161     array->max = src->max;
 162     array->str = xmalloc( array->max * sizeof(*array->str) );
 163     memcpy( array->str, src->str, array->count * sizeof(*array->str) );
 164     return array;
 165 }
 166
 167 static void strarray_add_one( struct strarray *array, const char *str )
 168 {
 169     if (array->count == array->max)
 170     {
 171         array->max *= 2;
 172         array->str = xrealloc( array->str, array->max * sizeof(*array->str) );
 173     }
 174     array->str[array->count++] = str;
 175 }
 176
 177 void strarray_add( struct strarray *array, ... )
 178 {
 179     va_list valist;
 180     const char *str;
 181
 182     va_start( valist, array );
 183     while ((str = va_arg( valist, const char *))) strarray_add_one( array, str );
 184     va_end( valist );
 185 }
 186
 187 void strarray_addv( struct strarray *array, char * const *argv )
 188 {
 189     while (*argv) strarray_add_one( array, *argv++ );
 190 }
 191
 192 struct strarray *strarray_fromstring( const char *str, const char *delim )
 193 {
 194     const char *tok;
 195     struct strarray *array = strarray_init( NULL );
 196     char *buf = strdup( str );
 197
 198     for (tok = strtok( buf, delim ); tok; tok = strtok( NULL, delim ))
 199         strarray_add_one( array, strdup( tok ));
 200
 201     free( buf );
 202     return array;
 203 }
 204
 205 void strarray_free( struct strarray *array )
 206 {
 207     free( array->str );
 208     free( array );
 209 }
 210
 211 void fatal_error( const char *msg, ... )
 212 {
 213     va_list valist;
 214     va_start( valist, msg );
 215     if (input_file_name)
 216     {
 217         fprintf( stderr, "%s:", input_file_name );
 218         if (current_line)
 219             fprintf( stderr, "%d:", current_line );
 220         fputc( ' ', stderr );
 221     }
 222     else fprintf( stderr, "winebuild: " );
 223     vfprintf( stderr, msg, valist );
 224     va_end( valist );
 225     exit(1);
 226 }
 227
 228 void fatal_perror( const char *msg, ... )
 229 {
 230     va_list valist;
 231     va_start( valist, msg );
 232     if (input_file_name)
 233     {
 234         fprintf( stderr, "%s:", input_file_name );
 235         if (current_line)
 236             fprintf( stderr, "%d:", current_line );
 237         fputc( ' ', stderr );
 238     }
 239     vfprintf( stderr, msg, valist );
 240     perror( " " );
 241     va_end( valist );
 242     exit(1);
 243 }
 244
 245 void error( const char *msg, ... )
 246 {
 247     va_list valist;
 248     va_start( valist, msg );
 249     if (input_file_name)
 250     {
 251         fprintf( stderr, "%s:", input_file_name );
 252         if (current_line)
 253             fprintf( stderr, "%d:", current_line );
 254         fputc( ' ', stderr );
 255     }
 256     vfprintf( stderr, msg, valist );
 257     va_end( valist );
 258     nb_errors++;
 259 }
 260
 261 void warning( const char *msg, ... )
 262 {
 263     va_list valist;
 264
 265     if (!display_warnings) return;
 266     va_start( valist, msg );
 267     if (input_file_name)
 268     {
 269         fprintf( stderr, "%s:", input_file_name );
 270         if (current_line)
 271             fprintf( stderr, "%d:", current_line );
 272         fputc( ' ', stderr );
 273     }
 274     fprintf( stderr, "warning: " );
 275     vfprintf( stderr, msg, valist );
 276     va_end( valist );
 277 }
 278
 279 int output( const char *format, ... )
 280 {
 281     int ret;
 282     va_list valist;
 283
 284     va_start( valist, format );
 285     ret = vfprintf( output_file, format, valist );
 286     va_end( valist );
 287     if (ret < 0) fatal_perror( "Output error" );
 288     return ret;
 289 }
 290
 291 void spawn( struct strarray *args )
 292 {
 293     unsigned int i;
 294     int status;
 295
 296     strarray_add_one( args, NULL );
 297     if (verbose)
 298         for (i = 0; args->str[i]; i++)
 299             fprintf( stderr, "%s%c", args->str[i], args->str[i+1] ? ' ' : '\n' );
 300
 301     if ((status = _spawnvp( _P_WAIT, args->str[0], args->str )))
 302     {
 303         if (status > 0) fatal_error( "%s failed with status %u\n", args->str[0], status );
 304         else fatal_perror( "winebuild" );
 305         exit( 1 );
 306     }
 307 }
 308
 309 /* find a build tool in the path, trying the various names */
 310 struct strarray *find_tool( const char *name, const char * const *names )
 311 {
 312     static char **dirs;
 313     static unsigned int count, maxlen;
 314
 315     char *p, *file;
 316     const char *alt_names[2];
 317     unsigned int i, len;
 318     struct stat st;
 319
 320     if (!dirs)
 321     {
 322         char *path;
 323
 324         /* split the path in directories */
 325
 326         if (!getenv( "PATH" )) fatal_error( "PATH not set, cannot find required tools\n" );
 327         path = xstrdup( getenv( "PATH" ));
 328         for (p = path, count = 2; *p; p++) if (*p == PATH_SEPARATOR) count++;
 329         dirs = xmalloc( count * sizeof(*dirs) );
 330         count = 0;
 331         dirs[count++] = p = path;
 332         while (*p)
 333         {
 334             while (*p && *p != PATH_SEPARATOR) p++;
 335             if (!*p) break;
 336             *p++ = 0;
 337             dirs[count++] = p;
 338         }
 339         for (i = 0; i < count; i++) maxlen = max( maxlen, strlen(dirs[i])+2 );
 340     }
 341
 342     if (!names)
 343     {
 344         alt_names[0] = name;
 345         alt_names[1] = NULL;
 346         names = alt_names;
 347     }
 348
 349     while (*names)
 350     {
 351         len = strlen(*names) + sizeof(EXEEXT) + 1;
 352         if (target_alias)
 353             len += strlen(target_alias) + 1;
 354         file = xmalloc( maxlen + len );
 355
 356         for (i = 0; i < count; i++)
 357         {
 358             strcpy( file, dirs[i] );
 359             p = file + strlen(file);
 360             if (p == file) *p++ = '.';
 361             if (p[-1] != '/') *p++ = '/';
 362             if (target_alias)
 363             {
 364                 strcpy( p, target_alias );
 365                 p += strlen(p);
 366                 *p++ = '-';
 367             }
 368             strcpy( p, *names );
 369             strcat( p, EXEEXT );
 370
 371             if (!stat( file, &st ) && S_ISREG(st.st_mode) && (st.st_mode & 0111))
 372                 return strarray_init( file );
 373         }
 374         free( file );
 375         names++;
 376     }
 377     fatal_error( "cannot find the '%s' tool\n", name );
 378 }
 379
 380 struct strarray *get_as_command(void)
 381 {
 382     struct strarray *args;
 383
 384     if (cc_command)
 385     {
 386         args = strarray_copy( cc_command );
 387         strarray_add( args, "-xassembler", "-c", NULL );
 388         if (force_pointer_size)
 389             strarray_add_one( args, (force_pointer_size == 8) ? "-m64" : "-m32" );
 390         if (cpu_option) strarray_add_one( args, strmake("-mcpu=%s", cpu_option) );
 391         return args;
 392     }
 393
 394     if (!as_command)
 395     {
 396         static const char * const commands[] = { "gas", "as", NULL };
 397         as_command = find_tool( "as", commands );
 398     }
 399
 400     args = strarray_copy( as_command );
 401
 402     if (force_pointer_size)
 403     {
 404         switch (target_platform)
 405         {
 406         case PLATFORM_APPLE:
 407             strarray_add( args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
 408             break;
 409         default:
 410             switch(target_cpu)
 411             {
 412             case CPU_POWERPC:
 413                 strarray_add_one( args, (force_pointer_size == 8) ? "-a64" : "-a32" );
 414                 break;
 415             default:
 416                 strarray_add_one( args, (force_pointer_size == 8) ? "--64" : "--32" );
 417                 break;
 418             }
 419             break;
 420         }
 421     }
 422
 423     if (cpu_option) strarray_add_one( args, strmake("-mcpu=%s", cpu_option) );
 424     return args;
 425 }
 426
 427 struct strarray *get_ld_command(void)
 428 {
 429     struct strarray *args;
 430
 431     if (!ld_command)
 432     {
 433         static const char * const commands[] = { "ld", "gld", NULL };
 434         ld_command = find_tool( "ld", commands );
 435     }
 436
 437     args = strarray_copy( ld_command );
 438
 439     if (force_pointer_size)
 440     {
 441         switch (target_platform)
 442         {
 443         case PLATFORM_APPLE:
 444             strarray_add( args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
 445             break;
 446         case PLATFORM_FREEBSD:
 447             strarray_add( args, "-m", (force_pointer_size == 8) ? "elf_x86_64_fbsd" : "elf_i386_fbsd", NULL );
 448             break;
 449         default:
 450             switch(target_cpu)
 451             {
 452             case CPU_POWERPC:
 453                 strarray_add( args, "-m", (force_pointer_size == 8) ? "elf64ppc" : "elf32ppc", NULL );
 454                 break;
 455             default:
 456                 strarray_add( args, "-m", (force_pointer_size == 8) ? "elf_x86_64" : "elf_i386", NULL );
 457                 break;
 458             }
 459             break;
 460         }
 461     }
 462     return args;
 463 }
 464
 465 const char *get_nm_command(void)
 466 {
 467     if (!nm_command)
 468     {
 469         static const char * const commands[] = { "nm", "gnm", NULL };
 470         nm_command = find_tool( "nm", commands );
 471     }
 472     if (nm_command->count > 1)
 473         fatal_error( "multiple arguments in nm command not supported yet\n" );
 474     return nm_command->str[0];
 475 }
 476
 477 /* get a name for a temp file, automatically cleaned up on exit */
 478 char *get_temp_file_name( const char *prefix, const char *suffix )
 479 {
 480     char *name;
 481     const char *ext, *basename;
 482     int fd;
 483
 484     if (!prefix || !prefix[0]) prefix = "winebuild";
 485     if (!suffix) suffix = "";
 486     if ((basename = strrchr( prefix, '/' ))) basename++;
 487     else basename = prefix;
 488     if (!(ext = strchr( basename, '.' ))) ext = prefix + strlen(prefix);
 489     name = xmalloc( sizeof("/tmp/") + (ext - prefix) + sizeof(".XXXXXX") + strlen(suffix) );
 490     memcpy( name, prefix, ext - prefix );
 491     strcpy( name + (ext - prefix), ".XXXXXX" );
 492     strcat( name, suffix );
 493
 494     if ((fd = mkstemps( name, strlen(suffix) )) == -1)
 495     {
 496         strcpy( name, "/tmp/" );
 497         memcpy( name + 5, basename, ext - basename );
 498         strcpy( name + 5 + (ext - basename), ".XXXXXX" );
 499         strcat( name, suffix );
 500         if ((fd = mkstemps( name, strlen(suffix) )) == -1)
 501             fatal_error( "could not generate a temp file\n" );
 502     }
 503
 504     close( fd );
 505     if (nb_tmp_files >= max_tmp_files)
 506     {
 507         max_tmp_files = max( 2 * max_tmp_files, 8 );
 508         tmp_files = xrealloc( tmp_files, max_tmp_files * sizeof(tmp_files[0]) );
 509     }
 510     tmp_files[nb_tmp_files++] = name;
 511     return name;
 512 }
 513
 514 /*******************************************************************
 515  *         buffer management
 516  *
 517  * Function for reading from/writing to a memory buffer.
 518  */
 519
 520 int byte_swapped = 0;
 521 const char *input_buffer_filename;
 522 const unsigned char *input_buffer;
 523 size_t input_buffer_pos;
 524 size_t input_buffer_size;
 525 unsigned char *output_buffer;
 526 size_t output_buffer_pos;
 527 size_t output_buffer_size;
 528
 529 static void check_output_buffer_space( size_t size )
 530 {
 531     if (output_buffer_pos + size >= output_buffer_size)
 532     {
 533         output_buffer_size = max( output_buffer_size * 2, output_buffer_pos + size );
 534         output_buffer = xrealloc( output_buffer, output_buffer_size );
 535     }
 536 }
 537
 538 void init_input_buffer( const char *file )
 539 {
 540     int fd;
 541     struct stat st;
 542
 543     if ((fd = open( file, O_RDONLY | O_BINARY )) == -1) fatal_perror( "Cannot open %s", file );
 544     if ((fstat( fd, &st ) == -1)) fatal_perror( "Cannot stat %s", file );
 545     if (!st.st_size) fatal_error( "%s is an empty file\n", file );
 546 #ifdef  HAVE_MMAP
 547     if ((input_buffer = mmap( NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0 )) == (void*)-1)
 548 #endif
 549     {
 550         unsigned char *buffer = xmalloc( st.st_size );
 551         if (read( fd, buffer, st.st_size ) != st.st_size) fatal_error( "Cannot read %s\n", file );
 552         input_buffer = buffer;
 553     }
 554     close( fd );
 555     input_buffer_filename = xstrdup( file );
 556     input_buffer_size = st.st_size;
 557     input_buffer_pos = 0;
 558     byte_swapped = 0;
 559 }
 560
 561 void init_output_buffer(void)
 562 {
 563     output_buffer_size = 1024;
 564     output_buffer_pos = 0;
 565     output_buffer = xmalloc( output_buffer_size );
 566 }
 567
 568 void flush_output_buffer(void)
 569 {
 570     if (fwrite( output_buffer, 1, output_buffer_pos, output_file ) != output_buffer_pos)
 571         fatal_error( "Error writing to %s\n", output_file_name );
 572     free( output_buffer );
 573 }
 574
 575 unsigned char get_byte(void)
 576 {
 577     if (input_buffer_pos >= input_buffer_size)
 578         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 579     return input_buffer[input_buffer_pos++];
 580 }
 581
 582 unsigned short get_word(void)
 583 {
 584     unsigned short ret;
 585
 586     if (input_buffer_pos + sizeof(ret) > input_buffer_size)
 587         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 588     memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
 589     if (byte_swapped) ret = (ret << 8) | (ret >> 8);
 590     input_buffer_pos += sizeof(ret);
 591     return ret;
 592 }
 593
 594 unsigned int get_dword(void)
 595 {
 596     unsigned int ret;
 597
 598     if (input_buffer_pos + sizeof(ret) > input_buffer_size)
 599         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 600     memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
 601     if (byte_swapped)
 602         ret = ((ret << 24) | ((ret << 8) & 0x00ff0000) | ((ret >> 8) & 0x0000ff00) | (ret >> 24));
 603     input_buffer_pos += sizeof(ret);
 604     return ret;
 605 }
 606
 607 void put_data( const void *data, size_t size )
 608 {
 609     check_output_buffer_space( size );
 610     memcpy( output_buffer + output_buffer_pos, data, size );
 611     output_buffer_pos += size;
 612 }
 613
 614 void put_byte( unsigned char val )
 615 {
 616     check_output_buffer_space( 1 );
 617     output_buffer[output_buffer_pos++] = val;
 618 }
 619
 620 void put_word( unsigned short val )
 621 {
 622     if (byte_swapped) val = (val << 8) | (val >> 8);
 623     put_data( &val, sizeof(val) );
 624 }
 625
 626 void put_dword( unsigned int val )
 627 {
 628     if (byte_swapped)
 629         val = ((val << 24) | ((val << 8) & 0x00ff0000) | ((val >> 8) & 0x0000ff00) | (val >> 24));
 630     put_data( &val, sizeof(val) );
 631 }
 632
 633 void put_qword( unsigned int val )
 634 {
 635     if (byte_swapped)
 636     {
 637         put_dword( 0 );
 638         put_dword( val );
 639     }
 640     else
 641     {
 642         put_dword( val );
 643         put_dword( 0 );
 644     }
 645 }
 646
 647 /* pointer-sized word */
 648 void put_pword( unsigned int val )
 649 {
 650     if (get_ptr_size() == 8) put_qword( val );
 651     else put_dword( val );
 652 }
 653
 654 void align_output( unsigned int align )
 655 {
 656     size_t size = align - (output_buffer_pos % align);
 657
 658     if (size == align) return;
 659     check_output_buffer_space( size );
 660     memset( output_buffer + output_buffer_pos, 0, size );
 661     output_buffer_pos += size;
 662 }
 663
 664 /* output a standard header for generated files */
 665 void output_standard_file_header(void)
 666 {
 667     if (spec_file_name)
 668         output( "/* File generated automatically from %s; do not edit! */\n", spec_file_name );
 669     else
 670         output( "/* File generated automatically; do not edit! */\n" );
 671     output( "/* This file can be copied, modified and distributed without restriction. */\n\n" );
 672 }
 673
 674 /* dump a byte stream into the assembly code */
 675 void dump_bytes( const void *buffer, unsigned int size )
 676 {
 677     unsigned int i;
 678     const unsigned char *ptr = buffer;
 679
 680     if (!size) return;
 681     output( "\t.byte " );
 682     for (i = 0; i < size - 1; i++, ptr++)
 683     {
 684         if ((i % 16) == 15) output( "0x%02x\n\t.byte ", *ptr );
 685         else output( "0x%02x,", *ptr );
 686     }
 687     output( "0x%02x\n", *ptr );
 688 }
 689
 690
 691 /*******************************************************************
 692  *         open_input_file
 693  *
 694  * Open a file in the given srcdir and set the input_file_name global variable.
 695  */
 696 FILE *open_input_file( const char *srcdir, const char *name )
 697 {
 698     char *fullname;
 699     FILE *file = fopen( name, "r" );
 700
 701     if (!file && srcdir)
 702     {
 703         fullname = strmake( "%s/%s", srcdir, name );
 704         file = fopen( fullname, "r" );
 705     }
 706     else fullname = xstrdup( name );
 707
 708     if (!file) fatal_error( "Cannot open file '%s'\n", fullname );
 709     input_file_name = fullname;
 710     current_line = 1;
 711     return file;
 712 }
 713
 714
 715 /*******************************************************************
 716  *         close_input_file
 717  *
 718  * Close the current input file (must have been opened with open_input_file).
 719  */
 720 void close_input_file( FILE *file )
 721 {
 722     fclose( file );
 723     free( input_file_name );
 724     input_file_name = NULL;
 725     current_line = 0;
 726 }
 727
 728
 729 /*******************************************************************
 730  *         remove_stdcall_decoration
 731  *
 732  * Remove a possible @xx suffix from a function name.
 733  * Return the numerical value of the suffix, or -1 if none.
 734  */
 735 int remove_stdcall_decoration( char *name )
 736 {
 737     char *p, *end = strrchr( name, '@' );
 738     if (!end || !end[1] || end == name) return -1;
 739     if (target_cpu != CPU_x86) return -1;
 740     /* make sure all the rest is digits */
 741     for (p = end + 1; *p; p++) if (!isdigit(*p)) return -1;
 742     *end = 0;
 743     return atoi( end + 1 );
 744 }
 745
 746
 747 /*******************************************************************
 748  *         assemble_file
 749  *
 750  * Run a file through the assembler.
 751  */
 752 void assemble_file( const char *src_file, const char *obj_file )
 753 {
 754     struct strarray *args = get_as_command();
 755     strarray_add( args, "-o", obj_file, src_file, NULL );
 756     spawn( args );
 757     strarray_free( args );
 758 }
 759
 760
 761 /*******************************************************************
 762  *         alloc_dll_spec
 763  *
 764  * Create a new dll spec file descriptor
 765  */
 766 DLLSPEC *alloc_dll_spec(void)
 767 {
 768     DLLSPEC *spec;
 769
 770     spec = xmalloc( sizeof(*spec) );
 771     spec->file_name          = NULL;
 772     spec->dll_name           = NULL;
 773     spec->init_func          = NULL;
 774     spec->main_module        = NULL;
 775     spec->type               = SPEC_WIN32;
 776     spec->base               = MAX_ORDINALS;
 777     spec->limit              = 0;
 778     spec->stack_size         = 0;
 779     spec->heap_size          = 0;
 780     spec->nb_entry_points    = 0;
 781     spec->alloc_entry_points = 0;
 782     spec->nb_names           = 0;
 783     spec->nb_resources       = 0;
 784     spec->characteristics    = IMAGE_FILE_EXECUTABLE_IMAGE;
 785     if (get_ptr_size() > 4)
 786         spec->characteristics |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
 787     else
 788         spec->characteristics |= IMAGE_FILE_32BIT_MACHINE;
 789     spec->dll_characteristics = IMAGE_DLLCHARACTERISTICS_NX_COMPAT;
 790     spec->subsystem          = 0;
 791     spec->subsystem_major    = 4;
 792     spec->subsystem_minor    = 0;
 793     spec->entry_points       = NULL;
 794     spec->names              = NULL;
 795     spec->ordinals           = NULL;
 796     spec->resources          = NULL;
 797     return spec;
 798 }
 799
 800
 801 /*******************************************************************
 802  *         free_dll_spec
 803  *
 804  * Free dll spec file descriptor
 805  */
 806 void free_dll_spec( DLLSPEC *spec )
 807 {
 808     int i;
 809
 810     for (i = 0; i < spec->nb_entry_points; i++)
 811     {
 812         ORDDEF *odp = &spec->entry_points[i];
 813         free( odp->name );
 814         free( odp->export_name );
 815         free( odp->link_name );
 816     }
 817     free( spec->file_name );
 818     free( spec->dll_name );
 819     free( spec->init_func );
 820     free( spec->entry_points );
 821     free( spec->names );
 822     free( spec->ordinals );
 823     free( spec->resources );
 824     free( spec );
 825 }
 826
 827
 828 /*******************************************************************
 829  *         make_c_identifier
 830  *
 831  * Map a string to a valid C identifier.
 832  */
 833 const char *make_c_identifier( const char *str )
 834 {
 835     static char buffer[256];
 836     char *p;
 837
 838     for (p = buffer; *str && p < buffer+sizeof(buffer)-1; p++, str++)
 839     {
 840         if (isalnum(*str)) *p = *str;
 841         else *p = '_';
 842     }
 843     *p = 0;
 844     return buffer;
 845 }
 846
 847
 848 /*******************************************************************
 849  *         get_stub_name
 850  *
 851  * Generate an internal name for a stub entry point.
 852  */
 853 const char *get_stub_name( const ORDDEF *odp, const DLLSPEC *spec )
 854 {
 855     static char *buffer;
 856
 857     free( buffer );
 858     if (odp->name || odp->export_name)
 859     {
 860         char *p;
 861         buffer = strmake( "__wine_stub_%s", odp->name ? odp->name : odp->export_name );
 862         /* make sure name is a legal C identifier */
 863         for (p = buffer; *p; p++) if (!isalnum(*p) && *p != '_') break;
 864         if (!*p) return buffer;
 865         free( buffer );
 866     }
 867     buffer = strmake( "__wine_stub_%s_%d", make_c_identifier(spec->file_name), odp->ordinal );
 868     return buffer;
 869 }
 870
 871 /* parse a cpu name and return the corresponding value */
 872 enum target_cpu get_cpu_from_name( const char *name )
 873 {
 874     unsigned int i;
 875
 876     for (i = 0; i < sizeof(cpu_names)/sizeof(cpu_names[0]); i++)
 877         if (!strcmp( cpu_names[i].name, name )) return cpu_names[i].cpu;
 878     return -1;
 879 }
 880
 881 /*****************************************************************
 882  *  Function:    get_alignment
 883  *
 884  *  Description:
 885  *    According to the info page for gas, the .align directive behaves
 886  * differently on different systems.  On some architectures, the
 887  * argument of a .align directive is the number of bytes to pad to, so
 888  * to align on an 8-byte boundary you'd say
 889  *     .align 8
 890  * On other systems, the argument is "the number of low-order zero bits
 891  * that the location counter must have after advancement."  So to
 892  * align on an 8-byte boundary you'd say
 893  *     .align 3
 894  *
 895  * The reason gas is written this way is that it's trying to mimick
 896  * native assemblers for the various architectures it runs on.  gas
 897  * provides other directives that work consistently across
 898  * architectures, but of course we want to work on all arches with or
 899  * without gas.  Hence this function.
 900  *
 901  *
 902  *  Parameters:
 903  *    align  --  the number of bytes to align to. Must be a power of 2.
 904  */
 905 unsigned int get_alignment(unsigned int align)
 906 {
 907     unsigned int n;
 908
 909     assert( !(align & (align - 1)) );
 910
 911     switch(target_cpu)
 912     {
 913     case CPU_x86:
 914     case CPU_x86_64:
 915         if (target_platform != PLATFORM_APPLE) return align;
 916         /* fall through */
 917     case CPU_POWERPC:
 918     case CPU_ARM:
 919     case CPU_ARM64:
 920         n = 0;
 921         while ((1u << n) != align) n++;
 922         return n;
 923     }
 924     /* unreached */
 925     assert(0);
 926     return 0;
 927 }
 928
 929 /* return the page size for the target CPU */
 930 unsigned int get_page_size(void)
 931 {
 932     switch(target_cpu)
 933     {
 934     case CPU_x86:     return 4096;
 935     case CPU_x86_64:  return 4096;
 936     case CPU_POWERPC: return 4096;
 937     case CPU_ARM:     return 4096;
 938     case CPU_ARM64:   return 4096;
 939     }
 940     /* unreached */
 941     assert(0);
 942     return 0;
 943 }
 944
 945 /* return the size of a pointer on the target CPU */
 946 unsigned int get_ptr_size(void)
 947 {
 948     switch(target_cpu)
 949     {
 950     case CPU_x86:
 951     case CPU_POWERPC:
 952     case CPU_ARM:
 953         return 4;
 954     case CPU_x86_64:
 955     case CPU_ARM64:
 956         return 8;
 957     }
 958     /* unreached */
 959     assert(0);
 960     return 0;
 961 }
 962
 963 /* return the total size in bytes of the arguments on the stack */
 964 unsigned int get_args_size( const ORDDEF *odp )
 965 {
 966     int i, size;
 967
 968     for (i = size = 0; i < odp->u.func.nb_args; i++)
 969     {
 970         switch (odp->u.func.args[i])
 971         {
 972         case ARG_INT64:
 973         case ARG_DOUBLE:
 974             size += 8;
 975             break;
 976         case ARG_INT128:
 977             /* int128 is passed as pointer on x86_64 */
 978             if (target_cpu != CPU_x86_64)
 979             {
 980                 size += 16;
 981                 break;
 982             }
 983             /* fall through */
 984         default:
 985             size += get_ptr_size();
 986             break;
 987         }
 988     }
 989     return size;
 990 }
 991
 992 /* return the assembly name for a C symbol */
 993 const char *asm_name( const char *sym )
 994 {
 995     static char *buffer;
 996
 997     switch (target_platform)
 998     {
 999     case PLATFORM_APPLE:
1000     case PLATFORM_WINDOWS:
1001         if (sym[0] == '.' && sym[1] == 'L') return sym;
1002         free( buffer );
1003         buffer = strmake( "_%s", sym );
1004         return buffer;
1005     default:
1006         return sym;
1007     }
1008 }
1009
1010 /* return an assembly function declaration for a C function name */
1011 const char *func_declaration( const char *func )
1012 {
1013     static char *buffer;
1014
1015     switch (target_platform)
1016     {
1017     case PLATFORM_APPLE:
1018         return "";
1019     case PLATFORM_WINDOWS:
1020         free( buffer );
1021         buffer = strmake( ".def _%s; .scl 2; .type 32; .endef", func );
1022         break;
1023     default:
1024         free( buffer );
1025         switch(target_cpu)
1026         {
1027         case CPU_ARM:
1028         case CPU_ARM64:
1029             buffer = strmake( ".type %s,%%function", func );
1030             break;
1031         default:
1032             buffer = strmake( ".type %s,@function", func );
1033             break;
1034         }
1035         break;
1036     }
1037     return buffer;
1038 }
1039
1040 /* output a size declaration for an assembly function */
1041 void output_function_size( const char *name )
1042 {
1043     switch (target_platform)
1044     {
1045     case PLATFORM_APPLE:
1046     case PLATFORM_WINDOWS:
1047         break;
1048     default:
1049         output( "\t.size %s, .-%s\n", name, name );
1050         break;
1051     }
1052 }
1053
1054 /* output a .cfi directive */
1055 void output_cfi( const char *format, ... )
1056 {
1057     va_list valist;
1058
1059     if (!unwind_tables) return;
1060     va_start( valist, format );
1061     fputc( '\t', output_file );
1062     vfprintf( output_file, format, valist );
1063     fputc( '\n', output_file );
1064     va_end( valist );
1065 }
1066
1067 /* output the GNU note for non-exec stack */
1068 void output_gnu_stack_note(void)
1069 {
1070     switch (target_platform)
1071     {
1072     case PLATFORM_WINDOWS:
1073     case PLATFORM_APPLE:
1074         break;
1075     default:
1076         switch(target_cpu)
1077         {
1078         case CPU_ARM:
1079         case CPU_ARM64:
1080             output( "\t.section .note.GNU-stack,\"\",%%progbits\n" );
1081             break;
1082         default:
1083             output( "\t.section .note.GNU-stack,\"\",@progbits\n" );
1084             break;
1085         }
1086         break;
1087     }
1088 }
1089
1090 /* return a global symbol declaration for an assembly symbol */
1091 const char *asm_globl( const char *func )
1092 {
1093     static char *buffer;
1094
1095     free( buffer );
1096     switch (target_platform)
1097     {
1098     case PLATFORM_APPLE:
1099         buffer = strmake( "\t.globl _%s\n\t.private_extern _%s\n_%s:", func, func, func );
1100         break;
1101     case PLATFORM_WINDOWS:
1102         buffer = strmake( "\t.globl _%s\n_%s:", func, func );
1103         break;
1104     default:
1105         buffer = strmake( "\t.globl %s\n\t.hidden %s\n%s:", func, func, func );
1106         break;
1107     }
1108     return buffer;
1109 }
1110
1111 const char *get_asm_ptr_keyword(void)
1112 {
1113     switch(get_ptr_size())
1114     {
1115     case 4: return ".long";
1116     case 8: return ".quad";
1117     }
1118     assert(0);
1119     return NULL;
1120 }
1121
1122 const char *get_asm_string_keyword(void)
1123 {
1124     switch (target_platform)
1125     {
1126     case PLATFORM_APPLE:
1127         return ".asciz";
1128     default:
1129         return ".string";
1130     }
1131 }
1132
1133 const char *get_asm_rodata_section(void)
1134 {
1135     switch (target_platform)
1136     {
1137     case PLATFORM_APPLE: return ".const";
1138     default:             return ".section .rodata";
1139     }
1140 }
1141
1142 const char *get_asm_string_section(void)
1143 {
1144     switch (target_platform)
1145     {
1146     case PLATFORM_APPLE: return ".cstring";
1147     default:             return ".section .rodata";
1148     }
1149 }