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         if (arch_option) strarray_add_one( args, strmake("-march=%s", arch_option) );
 392         return args;
 393     }
 394
 395     if (!as_command)
 396     {
 397         static const char * const commands[] = { "gas", "as", NULL };
 398         as_command = find_tool( "as", commands );
 399     }
 400
 401     args = strarray_copy( as_command );
 402
 403     if (force_pointer_size)
 404     {
 405         switch (target_platform)
 406         {
 407         case PLATFORM_APPLE:
 408             strarray_add( args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
 409             break;
 410         default:
 411             switch(target_cpu)
 412             {
 413             case CPU_POWERPC:
 414                 strarray_add_one( args, (force_pointer_size == 8) ? "-a64" : "-a32" );
 415                 break;
 416             default:
 417                 strarray_add_one( args, (force_pointer_size == 8) ? "--64" : "--32" );
 418                 break;
 419             }
 420             break;
 421         }
 422     }
 423
 424     if (cpu_option) strarray_add_one( args, strmake("-mcpu=%s", cpu_option) );
 425     return args;
 426 }
 427
 428 struct strarray *get_ld_command(void)
 429 {
 430     struct strarray *args;
 431
 432     if (!ld_command)
 433     {
 434         static const char * const commands[] = { "ld", "gld", NULL };
 435         ld_command = find_tool( "ld", commands );
 436     }
 437
 438     args = strarray_copy( ld_command );
 439
 440     if (force_pointer_size)
 441     {
 442         switch (target_platform)
 443         {
 444         case PLATFORM_APPLE:
 445             strarray_add( args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
 446             break;
 447         case PLATFORM_FREEBSD:
 448             strarray_add( args, "-m", (force_pointer_size == 8) ? "elf_x86_64_fbsd" : "elf_i386_fbsd", NULL );
 449             break;
 450         default:
 451             switch(target_cpu)
 452             {
 453             case CPU_POWERPC:
 454                 strarray_add( args, "-m", (force_pointer_size == 8) ? "elf64ppc" : "elf32ppc", NULL );
 455                 break;
 456             default:
 457                 strarray_add( args, "-m", (force_pointer_size == 8) ? "elf_x86_64" : "elf_i386", NULL );
 458                 break;
 459             }
 460             break;
 461         }
 462     }
 463     return args;
 464 }
 465
 466 const char *get_nm_command(void)
 467 {
 468     if (!nm_command)
 469     {
 470         static const char * const commands[] = { "nm", "gnm", NULL };
 471         nm_command = find_tool( "nm", commands );
 472     }
 473     if (nm_command->count > 1)
 474         fatal_error( "multiple arguments in nm command not supported yet\n" );
 475     return nm_command->str[0];
 476 }
 477
 478 /* get a name for a temp file, automatically cleaned up on exit */
 479 char *get_temp_file_name( const char *prefix, const char *suffix )
 480 {
 481     char *name;
 482     const char *ext, *basename;
 483     int fd;
 484
 485     if (!prefix || !prefix[0]) prefix = "winebuild";
 486     if (!suffix) suffix = "";
 487     if ((basename = strrchr( prefix, '/' ))) basename++;
 488     else basename = prefix;
 489     if (!(ext = strchr( basename, '.' ))) ext = prefix + strlen(prefix);
 490     name = xmalloc( sizeof("/tmp/") + (ext - prefix) + sizeof(".XXXXXX") + strlen(suffix) );
 491     memcpy( name, prefix, ext - prefix );
 492     strcpy( name + (ext - prefix), ".XXXXXX" );
 493     strcat( name, suffix );
 494
 495     if ((fd = mkstemps( name, strlen(suffix) )) == -1)
 496     {
 497         strcpy( name, "/tmp/" );
 498         memcpy( name + 5, basename, ext - basename );
 499         strcpy( name + 5 + (ext - basename), ".XXXXXX" );
 500         strcat( name, suffix );
 501         if ((fd = mkstemps( name, strlen(suffix) )) == -1)
 502             fatal_error( "could not generate a temp file\n" );
 503     }
 504
 505     close( fd );
 506     if (nb_tmp_files >= max_tmp_files)
 507     {
 508         max_tmp_files = max( 2 * max_tmp_files, 8 );
 509         tmp_files = xrealloc( tmp_files, max_tmp_files * sizeof(tmp_files[0]) );
 510     }
 511     tmp_files[nb_tmp_files++] = name;
 512     return name;
 513 }
 514
 515 /*******************************************************************
 516  *         buffer management
 517  *
 518  * Function for reading from/writing to a memory buffer.
 519  */
 520
 521 int byte_swapped = 0;
 522 const char *input_buffer_filename;
 523 const unsigned char *input_buffer;
 524 size_t input_buffer_pos;
 525 size_t input_buffer_size;
 526 unsigned char *output_buffer;
 527 size_t output_buffer_pos;
 528 size_t output_buffer_size;
 529
 530 static void check_output_buffer_space( size_t size )
 531 {
 532     if (output_buffer_pos + size >= output_buffer_size)
 533     {
 534         output_buffer_size = max( output_buffer_size * 2, output_buffer_pos + size );
 535         output_buffer = xrealloc( output_buffer, output_buffer_size );
 536     }
 537 }
 538
 539 void init_input_buffer( const char *file )
 540 {
 541     int fd;
 542     struct stat st;
 543
 544     if ((fd = open( file, O_RDONLY | O_BINARY )) == -1) fatal_perror( "Cannot open %s", file );
 545     if ((fstat( fd, &st ) == -1)) fatal_perror( "Cannot stat %s", file );
 546     if (!st.st_size) fatal_error( "%s is an empty file\n", file );
 547 #ifdef  HAVE_MMAP
 548     if ((input_buffer = mmap( NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0 )) == (void*)-1)
 549 #endif
 550     {
 551         unsigned char *buffer = xmalloc( st.st_size );
 552         if (read( fd, buffer, st.st_size ) != st.st_size) fatal_error( "Cannot read %s\n", file );
 553         input_buffer = buffer;
 554     }
 555     close( fd );
 556     input_buffer_filename = xstrdup( file );
 557     input_buffer_size = st.st_size;
 558     input_buffer_pos = 0;
 559     byte_swapped = 0;
 560 }
 561
 562 void init_output_buffer(void)
 563 {
 564     output_buffer_size = 1024;
 565     output_buffer_pos = 0;
 566     output_buffer = xmalloc( output_buffer_size );
 567 }
 568
 569 void flush_output_buffer(void)
 570 {
 571     if (fwrite( output_buffer, 1, output_buffer_pos, output_file ) != output_buffer_pos)
 572         fatal_error( "Error writing to %s\n", output_file_name );
 573     free( output_buffer );
 574 }
 575
 576 unsigned char get_byte(void)
 577 {
 578     if (input_buffer_pos >= input_buffer_size)
 579         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 580     return input_buffer[input_buffer_pos++];
 581 }
 582
 583 unsigned short get_word(void)
 584 {
 585     unsigned short ret;
 586
 587     if (input_buffer_pos + sizeof(ret) > input_buffer_size)
 588         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 589     memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
 590     if (byte_swapped) ret = (ret << 8) | (ret >> 8);
 591     input_buffer_pos += sizeof(ret);
 592     return ret;
 593 }
 594
 595 unsigned int get_dword(void)
 596 {
 597     unsigned int ret;
 598
 599     if (input_buffer_pos + sizeof(ret) > input_buffer_size)
 600         fatal_error( "%s is a truncated file\n", input_buffer_filename );
 601     memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
 602     if (byte_swapped)
 603         ret = ((ret << 24) | ((ret << 8) & 0x00ff0000) | ((ret >> 8) & 0x0000ff00) | (ret >> 24));
 604     input_buffer_pos += sizeof(ret);
 605     return ret;
 606 }
 607
 608 void put_data( const void *data, size_t size )
 609 {
 610     check_output_buffer_space( size );
 611     memcpy( output_buffer + output_buffer_pos, data, size );
 612     output_buffer_pos += size;
 613 }
 614
 615 void put_byte( unsigned char val )
 616 {
 617     check_output_buffer_space( 1 );
 618     output_buffer[output_buffer_pos++] = val;
 619 }
 620
 621 void put_word( unsigned short val )
 622 {
 623     if (byte_swapped) val = (val << 8) | (val >> 8);
 624     put_data( &val, sizeof(val) );
 625 }
 626
 627 void put_dword( unsigned int val )
 628 {
 629     if (byte_swapped)
 630         val = ((val << 24) | ((val << 8) & 0x00ff0000) | ((val >> 8) & 0x0000ff00) | (val >> 24));
 631     put_data( &val, sizeof(val) );
 632 }
 633
 634 void put_qword( unsigned int val )
 635 {
 636     if (byte_swapped)
 637     {
 638         put_dword( 0 );
 639         put_dword( val );
 640     }
 641     else
 642     {
 643         put_dword( val );
 644         put_dword( 0 );
 645     }
 646 }
 647
 648 /* pointer-sized word */
 649 void put_pword( unsigned int val )
 650 {
 651     if (get_ptr_size() == 8) put_qword( val );
 652     else put_dword( val );
 653 }
 654
 655 void align_output( unsigned int align )
 656 {
 657     size_t size = align - (output_buffer_pos % align);
 658
 659     if (size == align) return;
 660     check_output_buffer_space( size );
 661     memset( output_buffer + output_buffer_pos, 0, size );
 662     output_buffer_pos += size;
 663 }
 664
 665 /* output a standard header for generated files */
 666 void output_standard_file_header(void)
 667 {
 668     if (spec_file_name)
 669         output( "/* File generated automatically from %s; do not edit! */\n", spec_file_name );
 670     else
 671         output( "/* File generated automatically; do not edit! */\n" );
 672     output( "/* This file can be copied, modified and distributed without restriction. */\n\n" );
 673 }
 674
 675 /* dump a byte stream into the assembly code */
 676 void dump_bytes( const void *buffer, unsigned int size )
 677 {
 678     unsigned int i;
 679     const unsigned char *ptr = buffer;
 680
 681     if (!size) return;
 682     output( "\t.byte " );
 683     for (i = 0; i < size - 1; i++, ptr++)
 684     {
 685         if ((i % 16) == 15) output( "0x%02x\n\t.byte ", *ptr );
 686         else output( "0x%02x,", *ptr );
 687     }
 688     output( "0x%02x\n", *ptr );
 689 }
 690
 691
 692 /*******************************************************************
 693  *         open_input_file
 694  *
 695  * Open a file in the given srcdir and set the input_file_name global variable.
 696  */
 697 FILE *open_input_file( const char *srcdir, const char *name )
 698 {
 699     char *fullname;
 700     FILE *file = fopen( name, "r" );
 701
 702     if (!file && srcdir)
 703     {
 704         fullname = strmake( "%s/%s", srcdir, name );
 705         file = fopen( fullname, "r" );
 706     }
 707     else fullname = xstrdup( name );
 708
 709     if (!file) fatal_error( "Cannot open file '%s'\n", fullname );
 710     input_file_name = fullname;
 711     current_line = 1;
 712     return file;
 713 }
 714
 715
 716 /*******************************************************************
 717  *         close_input_file
 718  *
 719  * Close the current input file (must have been opened with open_input_file).
 720  */
 721 void close_input_file( FILE *file )
 722 {
 723     fclose( file );
 724     free( input_file_name );
 725     input_file_name = NULL;
 726     current_line = 0;
 727 }
 728
 729
 730 /*******************************************************************
 731  *         remove_stdcall_decoration
 732  *
 733  * Remove a possible @xx suffix from a function name.
 734  * Return the numerical value of the suffix, or -1 if none.
 735  */
 736 int remove_stdcall_decoration( char *name )
 737 {
 738     char *p, *end = strrchr( name, '@' );
 739     if (!end || !end[1] || end == name) return -1;
 740     if (target_cpu != CPU_x86) return -1;
 741     /* make sure all the rest is digits */
 742     for (p = end + 1; *p; p++) if (!isdigit(*p)) return -1;
 743     *end = 0;
 744     return atoi( end + 1 );
 745 }
 746
 747
 748 /*******************************************************************
 749  *         assemble_file
 750  *
 751  * Run a file through the assembler.
 752  */
 753 void assemble_file( const char *src_file, const char *obj_file )
 754 {
 755     struct strarray *args = get_as_command();
 756     strarray_add( args, "-o", obj_file, src_file, NULL );
 757     spawn( args );
 758     strarray_free( args );
 759 }
 760
 761
 762 /*******************************************************************
 763  *         alloc_dll_spec
 764  *
 765  * Create a new dll spec file descriptor
 766  */
 767 DLLSPEC *alloc_dll_spec(void)
 768 {
 769     DLLSPEC *spec;
 770
 771     spec = xmalloc( sizeof(*spec) );
 772     spec->file_name          = NULL;
 773     spec->dll_name           = NULL;
 774     spec->init_func          = NULL;
 775     spec->main_module        = NULL;
 776     spec->type               = SPEC_WIN32;
 777     spec->base               = MAX_ORDINALS;
 778     spec->limit              = 0;
 779     spec->stack_size         = 0;
 780     spec->heap_size          = 0;
 781     spec->nb_entry_points    = 0;
 782     spec->alloc_entry_points = 0;
 783     spec->nb_names           = 0;
 784     spec->nb_resources       = 0;
 785     spec->characteristics    = IMAGE_FILE_EXECUTABLE_IMAGE;
 786     if (get_ptr_size() > 4)
 787         spec->characteristics |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
 788     else
 789         spec->characteristics |= IMAGE_FILE_32BIT_MACHINE;
 790     spec->dll_characteristics = IMAGE_DLLCHARACTERISTICS_NX_COMPAT;
 791     spec->subsystem          = 0;
 792     spec->subsystem_major    = 4;
 793     spec->subsystem_minor    = 0;
 794     spec->entry_points       = NULL;
 795     spec->names              = NULL;
 796     spec->ordinals           = NULL;
 797     spec->resources          = NULL;
 798     return spec;
 799 }
 800
 801
 802 /*******************************************************************
 803  *         free_dll_spec
 804  *
 805  * Free dll spec file descriptor
 806  */
 807 void free_dll_spec( DLLSPEC *spec )
 808 {
 809     int i;
 810
 811     for (i = 0; i < spec->nb_entry_points; i++)
 812     {
 813         ORDDEF *odp = &spec->entry_points[i];
 814         free( odp->name );
 815         free( odp->export_name );
 816         free( odp->link_name );
 817     }
 818     free( spec->file_name );
 819     free( spec->dll_name );
 820     free( spec->init_func );
 821     free( spec->entry_points );
 822     free( spec->names );
 823     free( spec->ordinals );
 824     free( spec->resources );
 825     free( spec );
 826 }
 827
 828
 829 /*******************************************************************
 830  *         make_c_identifier
 831  *
 832  * Map a string to a valid C identifier.
 833  */
 834 const char *make_c_identifier( const char *str )
 835 {
 836     static char buffer[256];
 837     char *p;
 838
 839     for (p = buffer; *str && p < buffer+sizeof(buffer)-1; p++, str++)
 840     {
 841         if (isalnum(*str)) *p = *str;
 842         else *p = '_';
 843     }
 844     *p = 0;
 845     return buffer;
 846 }
 847
 848
 849 /*******************************************************************
 850  *         get_stub_name
 851  *
 852  * Generate an internal name for a stub entry point.
 853  */
 854 const char *get_stub_name( const ORDDEF *odp, const DLLSPEC *spec )
 855 {
 856     static char *buffer;
 857
 858     free( buffer );
 859     if (odp->name || odp->export_name)
 860     {
 861         char *p;
 862         buffer = strmake( "__wine_stub_%s", odp->name ? odp->name : odp->export_name );
 863         /* make sure name is a legal C identifier */
 864         for (p = buffer; *p; p++) if (!isalnum(*p) && *p != '_') break;
 865         if (!*p) return buffer;
 866         free( buffer );
 867     }
 868     buffer = strmake( "__wine_stub_%s_%d", make_c_identifier(spec->file_name), odp->ordinal );
 869     return buffer;
 870 }
 871
 872 /* parse a cpu name and return the corresponding value */
 873 int get_cpu_from_name( const char *name )
 874 {
 875     unsigned int i;
 876
 877     for (i = 0; i < sizeof(cpu_names)/sizeof(cpu_names[0]); i++)
 878         if (!strcmp( cpu_names[i].name, name )) return cpu_names[i].cpu;
 879     return -1;
 880 }
 881
 882 /*****************************************************************
 883  *  Function:    get_alignment
 884  *
 885  *  Description:
 886  *    According to the info page for gas, the .align directive behaves
 887  * differently on different systems.  On some architectures, the
 888  * argument of a .align directive is the number of bytes to pad to, so
 889  * to align on an 8-byte boundary you'd say
 890  *     .align 8
 891  * On other systems, the argument is "the number of low-order zero bits
 892  * that the location counter must have after advancement."  So to
 893  * align on an 8-byte boundary you'd say
 894  *     .align 3
 895  *
 896  * The reason gas is written this way is that it's trying to mimick
 897  * native assemblers for the various architectures it runs on.  gas
 898  * provides other directives that work consistently across
 899  * architectures, but of course we want to work on all arches with or
 900  * without gas.  Hence this function.
 901  *
 902  *
 903  *  Parameters:
 904  *    align  --  the number of bytes to align to. Must be a power of 2.
 905  */
 906 unsigned int get_alignment(unsigned int align)
 907 {
 908     unsigned int n;
 909
 910     assert( !(align & (align - 1)) );
 911
 912     switch(target_cpu)
 913     {
 914     case CPU_x86:
 915     case CPU_x86_64:
 916         if (target_platform != PLATFORM_APPLE) return align;
 917         /* fall through */
 918     case CPU_POWERPC:
 919     case CPU_ARM:
 920     case CPU_ARM64:
 921         n = 0;
 922         while ((1u << n) != align) n++;
 923         return n;
 924     }
 925     /* unreached */
 926     assert(0);
 927     return 0;
 928 }
 929
 930 /* return the page size for the target CPU */
 931 unsigned int get_page_size(void)
 932 {
 933     switch(target_cpu)
 934     {
 935     case CPU_x86:
 936     case CPU_x86_64:
 937     case CPU_POWERPC:
 938     case CPU_ARM:
 939         return 0x1000;
 940     case CPU_ARM64:
 941         return 0x10000;
 942     }
 943     /* unreached */
 944     assert(0);
 945     return 0;
 946 }
 947
 948 /* return the size of a pointer on the target CPU */
 949 unsigned int get_ptr_size(void)
 950 {
 951     switch(target_cpu)
 952     {
 953     case CPU_x86:
 954     case CPU_POWERPC:
 955     case CPU_ARM:
 956         return 4;
 957     case CPU_x86_64:
 958     case CPU_ARM64:
 959         return 8;
 960     }
 961     /* unreached */
 962     assert(0);
 963     return 0;
 964 }
 965
 966 /* return the total size in bytes of the arguments on the stack */
 967 unsigned int get_args_size( const ORDDEF *odp )
 968 {
 969     int i, size;
 970
 971     for (i = size = 0; i < odp->u.func.nb_args; i++)
 972     {
 973         switch (odp->u.func.args[i])
 974         {
 975         case ARG_INT64:
 976         case ARG_DOUBLE:
 977             size += 8;
 978             break;
 979         case ARG_INT128:
 980             /* int128 is passed as pointer on x86_64 */
 981             if (target_cpu != CPU_x86_64)
 982             {
 983                 size += 16;
 984                 break;
 985             }
 986             /* fall through */
 987         default:
 988             size += get_ptr_size();
 989             break;
 990         }
 991     }
 992     return size;
 993 }
 994
 995 /* return the assembly name for a C symbol */
 996 const char *asm_name( const char *sym )
 997 {
 998     static char *buffer;
 999
1000     switch (target_platform)
1001     {
1002     case PLATFORM_APPLE:
1003     case PLATFORM_WINDOWS:
1004         if (sym[0] == '.' && sym[1] == 'L') return sym;
1005         free( buffer );
1006         buffer = strmake( "_%s", sym );
1007         return buffer;
1008     default:
1009         return sym;
1010     }
1011 }
1012
1013 /* return an assembly function declaration for a C function name */
1014 const char *func_declaration( const char *func )
1015 {
1016     static char *buffer;
1017
1018     switch (target_platform)
1019     {
1020     case PLATFORM_APPLE:
1021         return "";
1022     case PLATFORM_WINDOWS:
1023         free( buffer );
1024         buffer = strmake( ".def _%s; .scl 2; .type 32; .endef", func );
1025         break;
1026     default:
1027         free( buffer );
1028         switch(target_cpu)
1029         {
1030         case CPU_ARM:
1031         case CPU_ARM64:
1032             buffer = strmake( ".type %s,%%function", func );
1033             break;
1034         default:
1035             buffer = strmake( ".type %s,@function", func );
1036             break;
1037         }
1038         break;
1039     }
1040     return buffer;
1041 }
1042
1043 /* output a size declaration for an assembly function */
1044 void output_function_size( const char *name )
1045 {
1046     switch (target_platform)
1047     {
1048     case PLATFORM_APPLE:
1049     case PLATFORM_WINDOWS:
1050         break;
1051     default:
1052         output( "\t.size %s, .-%s\n", name, name );
1053         break;
1054     }
1055 }
1056
1057 /* output a .cfi directive */
1058 void output_cfi( const char *format, ... )
1059 {
1060     va_list valist;
1061
1062     if (!unwind_tables) return;
1063     va_start( valist, format );
1064     fputc( '\t', output_file );
1065     vfprintf( output_file, format, valist );
1066     fputc( '\n', output_file );
1067     va_end( valist );
1068 }
1069
1070 /* output the GNU note for non-exec stack */
1071 void output_gnu_stack_note(void)
1072 {
1073     switch (target_platform)
1074     {
1075     case PLATFORM_WINDOWS:
1076     case PLATFORM_APPLE:
1077         break;
1078     default:
1079         switch(target_cpu)
1080         {
1081         case CPU_ARM:
1082         case CPU_ARM64:
1083             output( "\t.section .note.GNU-stack,\"\",%%progbits\n" );
1084             break;
1085         default:
1086             output( "\t.section .note.GNU-stack,\"\",@progbits\n" );
1087             break;
1088         }
1089         break;
1090     }
1091 }
1092
1093 /* return a global symbol declaration for an assembly symbol */
1094 const char *asm_globl( const char *func )
1095 {
1096     static char *buffer;
1097
1098     free( buffer );
1099     switch (target_platform)
1100     {
1101     case PLATFORM_APPLE:
1102         buffer = strmake( "\t.globl _%s\n\t.private_extern _%s\n_%s:", func, func, func );
1103         break;
1104     case PLATFORM_WINDOWS:
1105         buffer = strmake( "\t.globl _%s\n_%s:", func, func );
1106         break;
1107     default:
1108         buffer = strmake( "\t.globl %s\n\t.hidden %s\n%s:", func, func, func );
1109         break;
1110     }
1111     return buffer;
1112 }
1113
1114 const char *get_asm_ptr_keyword(void)
1115 {
1116     switch(get_ptr_size())
1117     {
1118     case 4: return ".long";
1119     case 8: return ".quad";
1120     }
1121     assert(0);
1122     return NULL;
1123 }
1124
1125 const char *get_asm_string_keyword(void)
1126 {
1127     switch (target_platform)
1128     {
1129     case PLATFORM_APPLE:
1130         return ".asciz";
1131     default:
1132         return ".string";
1133     }
1134 }
1135
1136 const char *get_asm_rodata_section(void)
1137 {
1138     switch (target_platform)
1139     {
1140     case PLATFORM_APPLE: return ".const";
1141     default:             return ".section .rodata";
1142     }
1143 }
1144
1145 const char *get_asm_string_section(void)
1146 {
1147     switch (target_platform)
1148     {
1149     case PLATFORM_APPLE: return ".cstring";
1150     default:             return ".section .rodata";
1151     }
1152 }