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Text File  |  1996-10-13  |  283KB  |  12,172 lines
  1. This file contains patches that transform the baseline version into
  2. the amiga version.  Assuming that you have unarchived the baseline
  3. version in the current directory, just run the command:
  4.  
  5.     patch -p1 -E -b .pbak <diff-file
  6.  
  7. where 'diff-file' is this patch file.  After running patch you should
  8. remove all the generated *.pbak files, and look for any *.rej files
  9. that indicate a problem patching the baseline source.
  10.  
  11. diff -rup --new-file baseline/fsf/dld/.name amiga/fsf/dld/.name
  12. --- baseline/fsf/dld/.name    Wed Dec 31 17:00:00 1969
  13. +++ amiga/fsf/dld/.name    Sat Sep 28 00:00:00 1996
  14. @@ -0,0 +1 @@
  15. +Dynamic Loader Version 3.2.1
  16. diff -rup --new-file baseline/fsf/dld/Makefile amiga/fsf/dld/Makefile
  17. --- baseline/fsf/dld/Makefile    Sun Mar 19 18:42:30 1995
  18. +++ amiga/fsf/dld/Makefile    Sat Sep 28 00:00:00 1996
  19. @@ -5,34 +5,40 @@ LIBS = dld.o find_exec.o define.o get_fu
  20.      remove.o error.o
  21.  INCLUDES = dld.h defs.h
  22.  
  23. -prefix = /usr/local/
  24. -exec_prefix = $(prefix)/
  25. -libdir = $(exec_prefix)lib/
  26. -infodir = $(prefix)info/
  27. -includedir = $(prefix)include/
  28. +prefix = /ade
  29. +exec_prefix = $(prefix)
  30. +libdir = $(exec_prefix)/lib
  31. +infodir = $(prefix)/info
  32. +guidedir = $(prefix)/guide
  33. +idvidir = $(prefix)/dvi
  34. +psdir = $(prefix)/ps
  35. +includedir = $(exec_prefix)/include
  36.  
  37.  CC= gcc
  38.  CFLAGS = -O6 -I.
  39.  CXXFLAGS = -O6 -I.
  40.  
  41. -all:    ${ARCHIVE}
  42. -all++:    ${ARCHIVE++}
  43. +TEXI2DVI = texi2dvi
  44. +DVIPS = dvips
  45.  
  46. -install:    $(ARCHIVE) dld.info
  47. +all:    ${ARCHIVE} ${ARCHIVE++} ar2hunk showsyms
  48. +
  49. +install:    $(ARCHIVE) dld.info dld.guide
  50.      -cp $(ARCHIVE) $(libdir)
  51.  #    -cp dld.info $(infodir) # makeinfo called so as to make dld.info there
  52.      -cp dld.h $(includedir)
  53. -
  54. -install++:    $(ARCHIVE++) install
  55.      -cp $(ARCHIVE++) $(libdir)
  56. -
  57. -prefix = /usr/local/
  58. -infodir = $(prefix)info/
  59. +    -cp ar2hunk $(prefix)bin
  60. +    -cp showsyms $(prefix)bin
  61.  
  62.  info:    $(infodir)/dld.info
  63.  $(infodir)/dld.info:    dld.texinfo
  64.      makeinfo dld.texinfo -o $(infodir)/dld.info
  65.  
  66. +guide:    $(guidedir)/dld.guide
  67. +$(guidedir)/dld.guide:    dld.texguide
  68. +    makeinfo --amiga dld.texinfo -o $(guidedir)/dld.guide
  69. +
  70.  srcdir=$(HOME)/dld/
  71.  dvidir=../dvi/
  72.  dvi:    $(dvidir)dld.dvi
  73. @@ -55,6 +61,12 @@ $(ARCHIVE++): ${LIBS} gxxload.o ${INCLUD
  74.      ar q $(ARCHIVE++) ${LIBS} gxxload.o
  75.      ranlib $(ARCHIVE++)
  76.  
  77. +ar2hunk:    ar2hunk.c
  78. +    gcc -o ar2hunk -O ar2hunk.c
  79. +
  80. +showsyms:    showsyms.c
  81. +    gcc -o showsyms -O showsyms.c
  82. +
  83.  clean:
  84.      -rm -f ${ARCHIVE} *.o *~ *.rej
  85.      cd test; make clean
  86. @@ -91,8 +103,7 @@ dist:    dld.tar.gz # dld-bin.tar.gz
  87.  
  88.  .cc.o:
  89.      ${CXX} -c ${CXXFLAGS} $*.cc
  90. -    # mv -f dld-bin.tar.*z $(HOME)/dist/
  91. -    cp -f dld*.lsm $(HOME)/dist/
  92. +
  93.  tar.gz:    dld.tar.gz
  94.  dld.tar.gz:    dld.tar
  95.      -rm -f dld.tar.*z
  96. @@ -134,9 +145,10 @@ dld-bin.tar.gz:    dld-bin.tar
  97.      -rm -f dld-bin.tar.*z
  98.      gzip dld-bin.tar
  99.      chmod 664 dld-bin.tar.*z
  100. -dld-bin.tar:     $(libdir)libdld.a $(infodir)dld.info $(includedir)dld.h
  101. +dld-bin.tar:    $(libdir)/libdld.a $(infodir)/dld.info $(includedir)/dld.h $(guidedir)/dld.guide
  102.      cd $(prefix); tar cohf dld-bin.tar include/dld.h \
  103. -        lib/libdld.a info/dld.info src/dld/COPYING src/dld/README
  104. +        lib/libdld.a info/dld.info src/dld/COPYING src/dld/README \
  105. +        info/dld/guide
  106.      cd $(prefix); chmod 664 dld-bin.tar
  107.      mv $(prefix)/dld-bin.tar ./
  108.  
  109. diff -rup --new-file baseline/fsf/dld/Product-Info amiga/fsf/dld/Product-Info
  110. --- baseline/fsf/dld/Product-Info    Wed Dec 31 17:00:00 1969
  111. +++ amiga/fsf/dld/Product-Info    Sat Sep 28 00:00:00 1996
  112. @@ -0,0 +1,25 @@
  113. +.name
  114. +dld
  115. +.fullname
  116. +GNU dynamic linker
  117. +.type
  118. +Developer Tool
  119. +.short
  120. +library to perform dynamic linking
  121. +.description
  122. +"DLD" is a library package of C functions that performs "dynamic link
  123. +editing".  Programs that use dld can add compiled object code to or
  124. +remove such code from a process anytime during its execution.  Loading
  125. +modules, searching libraries, resolving external references, and
  126. +allocating storage for global and static data structures are all
  127. +performed at run time.
  128. +.version
  129. +3.2.6
  130. +.author
  131. +Free Software Foundation
  132. +.requirements
  133. +Amiga binaries require ixemul.library.
  134. +.distribution
  135. +GNU Public License
  136. +.described-by
  137. +Fred Fish (fnf@amigalib.com)
  138. diff -rup --new-file baseline/fsf/dld/TAGS amiga/fsf/dld/TAGS
  139. --- baseline/fsf/dld/TAGS    Wed Dec 31 17:00:00 1969
  140. +++ amiga/fsf/dld/TAGS    Sat Sep 28 00:00:00 1996
  141. @@ -0,0 +1,115 @@
  142. +
  143. +define.c,23
  144. +dld_define_sym 28,731
  145. +
  146. +defs.h,36
  147. +#define del_link_list_elt(171,5546
  148. +
  149. +dld.c,2122
  150. +#define ABSOLUTE_FILENAME_P(1514,43772
  151. +#define ABSOLUTE_FILENAME_P(1517,43871
  152. +#define N_BSSADDR(96,2839
  153. +#define N_DATADDR(83,2482
  154. +#define N_DATADDR(88,2655
  155. +#define N_TXTADDR(74,2357
  156. +#define N_TXTADDR(77,2402
  157. +#define RELOC_ADDRESS(163,5594
  158. +#define RELOC_ADDRESS(191,6740
  159. +#define RELOC_ADDRESS(202,7090
  160. +#define RELOC_ADD_EXTRA(167,5807
  161. +#define RELOC_EXTERN_P(164,5654
  162. +#define RELOC_EXTERN_P(192,6783
  163. +#define RELOC_EXTERN_P(203,7133
  164. +#define RELOC_MEMORY_SUB_P(166,5774
  165. +#define RELOC_MEMORY_SUB_P(194,6871
  166. +#define RELOC_MEMORY_SUB_P(205,7221
  167. +#define RELOC_PCREL_P(168,5870
  168. +#define RELOC_PCREL_P(196,6938
  169. +#define RELOC_PCREL_P(207,7277
  170. +#define RELOC_SYMBOL(165,5716
  171. +#define RELOC_SYMBOL(193,6826
  172. +#define RELOC_SYMBOL(204,7176
  173. +#define RELOC_TARGET_BITSIZE(172,6130
  174. +#define RELOC_TARGET_SIZE(171,6057
  175. +#define RELOC_TARGET_SIZE(197,6993
  176. +#define RELOC_TARGET_SIZE(208,7318
  177. +#define RELOC_VALUE_RIGHTSHIFT(170,5978
  178. +_dld_enter_global_ref 643,19457
  179. +_dld_getsym 562,16820
  180. +_dld_getsym_soft 597,17623
  181. +_dld_malloc 289,10004
  182. +_dld_patch_all_files 1645,47694
  183. +_dld_unlink_entry 2061,57982
  184. +clean_up 1860,53243
  185. +cleanup_obsolete_entries 1776,51248
  186. +cleanup_symtab 756,22625
  187. +concat 303,10266
  188. +decode_library_subfile 857,25313
  189. +dld_function_executable_p 2097,58772
  190. +dld_get_bare_symbol 2038,57445
  191. +dld_init 1925,54598
  192. +dld_link 1987,56238
  193. +do_local_relocation 1190,35332
  194. +do_unlink 1887,53910
  195. +enter_file_symbols 743,22259
  196. +fatal 279,9838
  197. +file_close 345,11261
  198. +file_open 357,11568
  199. +find_all_executable_modules 1710,49520
  200. +hash_string 543,16500
  201. +insert_entry 321,10780
  202. +invalidate 1690,49094
  203. +kill_entry 1809,52087
  204. +linear_library 1066,31684
  205. +make_entry 1522,44038
  206. +perform_relocation 1423,41646
  207. +read_entry_strings 481,14684
  208. +read_entry_symbols 444,13736
  209. +read_file_symbols 1548,44832
  210. +read_header 390,12260
  211. +read_text_and_data 1586,45835
  212. +reloc_info_ok 507,15456
  213. +relocate_entry_symbols 1624,47109
  214. +relocate_local_refs 1323,38649
  215. +relocate_symbol_address 1147,33863
  216. +remove_cross_references 1744,50427
  217. +search_library 824,24333
  218. +st_read_header 411,12712
  219. +subfile_wanted_p 1114,32927
  220. +symdef_library 913,26917
  221. +
  222. +dld.h,0
  223. +
  224. +error.c,20
  225. +dld_perror 47,1657
  226. +
  227. +find_exec.c,119
  228. +#define ABSOLUTE_FILENAME_P(46,1242
  229. +#define ABSOLUTE_FILENAME_P(49,1341
  230. +copy_of 32,996
  231. +dld_find_executable 53,1423
  232. +
  233. +get_func.c,21
  234. +dld_get_func 25,735
  235. +
  236. +get_symbol.c,23
  237. +dld_get_symbol 26,727
  238. +
  239. +list_undef.c,31
  240. +dld_list_undefined_sym 31,873
  241. +
  242. +mk_dummy.c,32
  243. +_dld_create_dummy_entry 25,705
  244. +
  245. +ref.c,29
  246. +dld_create_reference 29,893
  247. +
  248. +remove.c,34
  249. +dld_remove_defined_symbol 28,780
  250. +
  251. +ul_file.c,49
  252. +dld_unlink_by_file 48,1171
  253. +search_files 24,656
  254. +
  255. +ul_symbol.c,29
  256. +dld_unlink_by_symbol 24,654
  257. diff -rup --new-file baseline/fsf/dld/ar2hunk.c amiga/fsf/dld/ar2hunk.c
  258. --- baseline/fsf/dld/ar2hunk.c    Wed Dec 31 17:00:00 1969
  259. +++ amiga/fsf/dld/ar2hunk.c    Sat Sep 28 00:00:00 1996
  260. @@ -0,0 +1,55 @@
  261. +#include <stdio.h>
  262. +#include <stdlib.h>
  263. +#include <ar.h>
  264. +
  265. +static char buf[10240];
  266. +
  267. +main(int argc, char **argv)
  268. +{
  269. +  FILE *exe, *arc;
  270. +  int id, r;
  271. +
  272. +  if (argc != 3)
  273. +  {
  274. +    fprintf(stderr, "usage: ar2hunk <executable> <archive>\n");
  275. +    exit(2);
  276. +  }
  277. +  exe = fopen(argv[1], "r+");
  278. +  arc = fopen(argv[2], "r");
  279. +  if (!exe || !arc)
  280. +  {
  281. +    if (!exe)
  282. +      fprintf(stderr, "cannot open %s\n", argv[1]);
  283. +    if (!arc)
  284. +      fprintf(stderr, "cannot open %s\n", argv[2]);
  285. +    exit(2);
  286. +  }
  287. +  fseek(exe, -4, SEEK_END);
  288. +  fread(&id, 4, 1, exe);
  289. +  if (id != 0x3f2)
  290. +  {
  291. +    fprintf(stderr, "%s is malformed (no hunk_end found)\n", argv[1]);
  292. +    exit(1);
  293. +  }
  294. +  fread(buf, SARMAG, 1, arc);
  295. +  if (*((long *)buf) != 0x10107 && strncmp(buf, ARMAG))
  296. +  {
  297. +    fprintf(stderr, "%s is malformed (not an archive)\n", argv[2]);
  298. +    exit(1);
  299. +  }
  300. +  fseek(exe, -4, SEEK_END);
  301. +  id = 0x3f1;
  302. +  fwrite(&id, 4, 1, exe);
  303. +  fseek(arc, 0, SEEK_END);
  304. +  id = ftell(arc);
  305. +  id = (id + 3) / 4;
  306. +  fseek(arc, 0, SEEK_SET);
  307. +  fwrite(&id, 4, 1, exe);
  308. +  while (r = fread(buf, 1, 10240, arc))
  309. +  {
  310. +    r = (r + 3) & ~3;
  311. +    fwrite(buf, 1, r, exe);
  312. +  }
  313. +  id = 0x3f2;
  314. +  fwrite(&id, 4, 1, exe);
  315. +}
  316. diff -rup --new-file baseline/fsf/dld/dld.c amiga/fsf/dld/dld.c
  317. --- baseline/fsf/dld/dld.c    Fri Feb 10 06:10:46 1995
  318. +++ amiga/fsf/dld/dld.c    Sat Sep 28 00:00:00 1996
  319. @@ -55,7 +55,7 @@
  320.  #include <alloca.h>
  321.  #endif
  322.  #endif
  323. -
  324. +
  325.  /* System dependencies */
  326.  
  327.  #ifdef atarist
  328. @@ -211,7 +211,23 @@ static int reloc_target_bitsize[] = {
  329.  /* Size of a page; obtained from the operating system. */
  330.  
  331.  static int page_size;
  332. -
  333. +
  334. +#ifdef __amigaos__
  335. +
  336. +#undef MAXINT
  337. +#undef MININT
  338. +#undef BITSPERBYTE
  339. +#undef LONGBITS
  340. +
  341. +#include <proto/exec.h>
  342. +#include <exec/execbase.h>
  343. +
  344. +static int amiga_debug_hunk_offset, amiga_debug_hunk_size, input_offset;
  345. +static int amiga_debug_file;
  346. +#else
  347. +#define input_offset (0)
  348. +#endif
  349. +
  350.  /* The symbol hash table: a vector of TABSIZE pointers to struct glosym. */
  351.  symbol *_dld_symtab[TABSIZE];
  352.  
  353. @@ -238,7 +254,7 @@ struct dld_reloc_info {
  354.         using a separate definition for each system. */
  355.      struct relocation_info reloc_info;
  356.  };
  357. -
  358. +
  359.  /* Format of __.SYMDEF:
  360.     First, a longword containing the size of the 'symdef' data that follows.
  361.     Second, zero or more 'symdef' structures.
  362. @@ -264,14 +280,14 @@ struct file_entry *_dld_dummy_entry = 0;
  363.     if no file is open.
  364.   */
  365.  static struct file_entry *input_file = 0;
  366. -static int input_desc = 0;
  367. +static FILE *input_desc = 0;
  368.  
  369.  /* global variables to return the error code to the caller */
  370.  int dld_errno;
  371.  
  372.  /* true if the executable flags are up-to-date */
  373.  char _dld_exec_flags_valid;
  374. -
  375. +
  376.  /* Miscellaneous routines */
  377.  
  378.  /* save the error code in dld_errno */
  379. @@ -343,9 +359,9 @@ register struct file_entry *entry;
  380.  /* Close the input file that is now open.  */
  381.  
  382.  static void
  383. -file_close ()
  384. +file_close (void)
  385.  {
  386. -  if (input_desc) close (input_desc);
  387. +  if (input_desc) fclose (input_desc);
  388.    input_desc = 0;
  389.    input_file = 0;
  390.  } /* file_close */
  391. @@ -354,11 +370,11 @@ file_close ()
  392.     The open file is remembered; if the same file is opened twice in a row,
  393.     a new open is not actually done.  */
  394.  
  395. -static int
  396. +static FILE *
  397.  file_open (entry)
  398.  register struct file_entry *entry;
  399.  {
  400. -    register int desc;
  401. +    register FILE *desc;
  402.  
  403.      if (entry == 0) fatal (DLD_ENOFILE);
  404.  
  405. @@ -370,9 +386,23 @@ register struct file_entry *entry;
  406.  
  407.      if (input_file) file_close ();
  408.  
  409. -    desc = open (entry->filename, O_RDONLY, 0);
  410. +    if (amiga_debug_file = (entry->filename[strlen(entry->filename) - 1] == 1
  411. +        && amiga_debug_hunk_size))
  412. +    {
  413. +      char *p = entry->filename + strlen(entry->filename) - 1;
  414.  
  415. -    if (desc > 0) {
  416. +      *p = 0;
  417. +      desc = fopen (entry->filename, "r");
  418. +      *p = 1;
  419. +    }
  420. +    else
  421. +      desc = fopen (entry->filename, "r");
  422. +
  423. +    if (desc) {
  424. +        if (amiga_debug_file)
  425. +          fseek(desc, input_offset = amiga_debug_hunk_offset, SEEK_CUR);
  426. +        else
  427. +          input_offset = 0;
  428.      input_file = entry;
  429.      input_desc = desc;
  430.      return desc;
  431. @@ -380,9 +410,9 @@ register struct file_entry *entry;
  432.  
  433.      fatal (DLD_ENOFILE);
  434.  
  435. -    return(1);  /* To supress warning message */
  436. +    return (stdout);  /* To supress warning message */
  437.  } /* file_open */
  438. -
  439. +
  440.  /* Medium-level input routines for rel files.  */
  441.  
  442.  /* Read a file's header into the proper place in the file_entry.
  443. @@ -391,14 +421,14 @@ register struct file_entry *entry;
  444.  
  445.  static void
  446.  read_header (desc, entry)
  447. -int desc;
  448. +FILE *desc;
  449.  register struct file_entry *entry;
  450.  {
  451.      register int len;
  452.      struct exec *loc = &entry->header;
  453.  
  454. -    lseek (desc, entry->starting_offset, 0);
  455. -    len = read (desc, loc, sizeof (struct exec));
  456. +    fseek (desc, input_offset + entry->starting_offset, 0);
  457. +    len = fread (loc, 1, sizeof (struct exec), desc);
  458.      if (len != sizeof (struct exec))
  459.      fatal (DLD_EBADHEADER);
  460.      if (N_BADMAG (*loc))
  461. @@ -446,7 +476,7 @@ register struct file_entry *entry;
  462.  static void
  463.  read_entry_symbols (desc, entry)
  464.  struct file_entry *entry;
  465. -int desc;
  466. +FILE *desc;
  467.  {
  468.      int str_size;
  469.  
  470. @@ -458,16 +488,16 @@ int desc;
  471.  
  472.      entry->symbols = (struct nlist *) _dld_malloc (entry->header.a_syms);
  473.  
  474. -    lseek (desc, N_SYMOFF (entry->header) + entry->starting_offset, 0);
  475. +    fseek (desc, input_offset + N_SYMOFF (entry->header) + entry->starting_offset, 0);
  476.      if (entry->header.a_syms !=
  477. -    read (desc, entry->symbols, entry->header.a_syms)) {
  478. +    fread (entry->symbols, 1, entry->header.a_syms, desc)) {
  479.      free (entry->symbols);
  480.      entry->symbols = 0;
  481.      fatal (DLD_ENOSYMBOLS);
  482.      }
  483.  
  484. -    lseek (desc, N_STROFF (entry->header) + entry->starting_offset, 0);
  485. -    if (sizeof str_size != read (desc, &str_size, sizeof str_size)) {
  486. +    fseek (desc, input_offset + N_STROFF (entry->header) + entry->starting_offset, 0);
  487. +    if (sizeof str_size != fread (&str_size, 1, sizeof str_size, desc)) {
  488.      free (entry->symbols);
  489.      entry->symbols = 0;
  490.      fatal (DLD_ENOSTRINGS);
  491. @@ -483,16 +513,15 @@ int desc;
  492.  static void
  493.  read_entry_strings (desc, entry)
  494.  struct file_entry *entry;
  495. -int desc;
  496. +FILE *desc;
  497.  {
  498.      if (!entry->header_read_flag)
  499.      read_header (desc, entry);
  500.  
  501.      entry->strings = (char *) _dld_malloc (entry->string_size);
  502.  
  503. -    lseek (desc, N_STROFF (entry->header) + entry->starting_offset, 0);
  504. -    if (entry->string_size != read (desc, entry->strings,
  505. -                    entry->string_size)) {
  506. +    fseek (desc, input_offset + N_STROFF (entry->header) + entry->starting_offset, 0);
  507. +    if (entry->string_size != fread (entry->strings, 1, entry->string_size, desc)) {
  508.      free (entry->strings);
  509.      entry->strings = 0;
  510.      fatal (DLD_ENOSTRINGS);
  511. @@ -538,7 +567,7 @@ register int sym_size;
  512.      return extern_count++;     /*  this postincrement does nothing */
  513.                     /*  but preincrement causes bug     */
  514.  } /* reloc_info_ok */
  515. -
  516. +
  517.  /* symbol table management */
  518.  
  519.  /* Compute the hash code for symbol name KEY.  */
  520. @@ -846,7 +875,7 @@ cleanup_symtab ()
  521.      }
  522.      }
  523.  } /* cleanup_symtab */
  524. -
  525. +
  526.  /* Searching libraries */
  527.  
  528.  static struct file_entry *decode_library_subfile ();
  529. @@ -861,7 +890,7 @@ static void read_text_and_data ();
  530.  
  531.  static void
  532.  search_library (desc, entry)
  533. -int desc;
  534. +FILE *desc;
  535.  struct file_entry *entry;
  536.  {
  537.      int member_length;
  538. @@ -898,7 +927,7 @@ struct file_entry *entry;
  539.  
  540.  static struct file_entry *
  541.  decode_library_subfile (desc, library_entry, subfile_offset, length_loc)
  542. -int desc;
  543. +FILE *desc;
  544.  struct file_entry *library_entry;
  545.  int subfile_offset;
  546.  int *length_loc;
  547. @@ -910,9 +939,11 @@ int *length_loc;
  548.      struct ar_hdr hdr1;
  549.      register struct file_entry *subentry;
  550.  
  551. -    lseek (desc, subfile_offset, 0);
  552. +    fseek (desc, input_offset + subfile_offset, 0);
  553.  
  554. -    bytes_read = read (desc, &hdr1, sizeof hdr1);
  555. +    if (amiga_debug_file && subfile_offset >= amiga_debug_hunk_size - 4)
  556. +      return 0;
  557. +    bytes_read = fread (&hdr1, 1, sizeof hdr1, desc);
  558.      if (!bytes_read)
  559.      return 0;        /* end of archive */
  560.  
  561. @@ -954,7 +985,7 @@ int *length_loc;
  562.  
  563.  static void
  564.  symdef_library (desc, entry, member_length)
  565. -int desc;
  566. +FILE *desc;
  567.  struct file_entry *entry;
  568.  int member_length;
  569.  {
  570. @@ -969,7 +1000,7 @@ int member_length;
  571.      struct file_entry *prev = 0;
  572.      int prev_offset = 0;
  573.  
  574. -    bytes_read = read (desc, symdef_data, member_length);
  575. +    bytes_read = fread (symdef_data, 1, member_length, desc);
  576.      if (bytes_read != member_length) {
  577.      free (symdef_data);
  578.      fatal (DLD_EBADLIBRARY);
  579. @@ -1107,7 +1138,7 @@ int member_length;
  580.  
  581.  static void
  582.  linear_library (desc, entry)
  583. -int desc;
  584. +FILE *desc;
  585.  struct file_entry *entry;
  586.  {
  587.      register struct file_entry *prev = 0;
  588. @@ -1184,7 +1215,7 @@ struct file_entry *entry;
  589.  
  590.      return 0;
  591.  } /* subfile_wanted_p */
  592. -
  593. +
  594.  /* Relocate the addresses of the file's symbols.  */
  595.  static void
  596.  relocate_symbol_address (entry)
  597. @@ -1337,7 +1368,6 @@ int reloc_size;
  598.      }
  599.  
  600.  #else
  601. -
  602.      switch (length) {
  603.          case 0: *(char *) (data + addr) += relocation;
  604.              break;
  605. @@ -1364,7 +1394,7 @@ int reloc_size;
  606.  */
  607.  static void
  608.  relocate_local_refs (desc, entry)
  609. -int desc;
  610. +FILE *desc;
  611.  struct file_entry *entry;
  612.  {
  613.      int text_offset;
  614. @@ -1385,10 +1415,10 @@ struct file_entry *entry;
  615.      reloc_buf = (struct relocation_info *)
  616.          _dld_malloc (entry->header.a_trsize);
  617.  
  618. -    lseek (desc, text_offset + entry->header.a_text +
  619. +    fseek (desc, input_offset + text_offset + entry->header.a_text +
  620.             entry->header.a_data, 0);
  621.      if (entry->header.a_trsize !=
  622. -        read (desc, reloc_buf, entry->header.a_trsize)) {
  623. +        fread (reloc_buf, 1, entry->header.a_trsize, desc)) {
  624.          free (reloc_buf);
  625.          fatal (DLD_ENOTXTRELOC);
  626.      }
  627. @@ -1415,10 +1445,10 @@ struct file_entry *entry;
  628.      reloc_buf = (struct relocation_info *)
  629.          _dld_malloc (entry->header.a_drsize);
  630.  
  631. -    lseek (desc, text_offset + entry->header.a_text +
  632. +    fseek (desc, input_offset + text_offset + entry->header.a_text +
  633.             entry->header.a_data + entry->header.a_trsize, 0);
  634.      if (entry->header.a_drsize !=
  635. -        read (desc, reloc_buf, entry->header.a_drsize)) {
  636. +        fread (reloc_buf, 1, entry->header.a_drsize, desc)) {
  637.          free (reloc_buf);
  638.          fatal (DLD_ENODATRELOC);
  639.      }
  640. @@ -1561,7 +1591,7 @@ int reverse;
  641.  #endif
  642.      }
  643.  } /* perform_relocation */
  644. -
  645. +
  646.  /* ABSOLUTE_FILENAME_P (fname): True if fname is an absolute filename */
  647.  #ifdef atarist
  648.  #define ABSOLUTE_FILENAME_P(fname)    ((fname[0] == '/') || \
  649. @@ -1599,14 +1629,14 @@ char *filename;
  650.  
  651.  static void
  652.  read_file_symbols (desc, entry, load_text)
  653. -register int desc;
  654. +register FILE *desc;
  655.  register struct file_entry *entry;
  656.  int load_text;                /* used only by dld_init */
  657.  {
  658.      register int len;
  659.      int magicnum;
  660.  
  661. -    len = read (desc, &magicnum, sizeof magicnum);
  662. +    len = fread (&magicnum, 1, sizeof magicnum, desc);
  663.      if (len != sizeof magicnum)
  664.      fatal (DLD_EBADHEADER);
  665.  
  666. @@ -1624,20 +1654,136 @@ int load_text;                /* used only by dld
  667.      } else {
  668.      char armag[SARMAG];
  669.  
  670. -    lseek (desc, 0, 0);
  671. -    if (SARMAG != read (desc, armag, SARMAG) || strncmp (armag, ARMAG, SARMAG))
  672. +    fseek (desc, input_offset, 0);
  673. +    if (SARMAG != fread (armag, 1, SARMAG, desc) || strncmp (armag, ARMAG, SARMAG))
  674.          fatal (DLD_EBADOBJECT);
  675.      entry->library_flag = 1;
  676.      search_library (desc, entry);
  677.      }
  678.  } /* read_file_symbols */
  679.  
  680. +#ifdef AMIGA
  681. +
  682. +static unsigned long get_num(FILE *fd)
  683. +{
  684. +  unsigned long t;
  685. +  
  686. +  fread(&t, 1, 4, fd);
  687. +  return t;
  688. +}
  689. +
  690. +static void skip(FILE *fd, unsigned long t)
  691. +{
  692. +  fseek(fd, t * 4, SEEK_CUR);
  693. +}
  694. +
  695. +static void
  696. +amiga_read_file_symbols (desc, entry)
  697. +register FILE *desc;
  698. +register struct file_entry *entry;
  699. +{
  700. +  extern int _sdata, _stext, _bss_start;
  701. +  int t, f, l;
  702. +  int start, type;
  703. +  int name_size = 500;
  704. +  char *name;
  705. +
  706. +  if (get_num(desc) != 0x03f3)
  707. +    fatal (DLD_EBADHEADER);
  708. +  name = (char *)_dld_malloc(name_size);
  709. +  while (t = get_num(desc))
  710. +    skip(desc, t);
  711. +  get_num(desc);
  712. +  f = get_num(desc);
  713. +  l = get_num(desc);
  714. +  skip(desc, l - f + 1);
  715. +  while (l >= 0)
  716. +  {
  717. +    switch (get_num(desc) & 0xffff)
  718. +    {
  719. +      case 0x03e9:      /* text */
  720. +        type = N_TEXT | N_EXT;
  721. +        skip(desc, get_num(desc));
  722. +        start = (int)&_stext;
  723. +        break;
  724. +      case 0x03ea:      /* data */
  725. +        type = N_DATA | N_EXT;
  726. +        skip(desc, get_num(desc));
  727. +        start = (int)&_sdata;
  728. +        break;
  729. +      case 0x03eb:      /* bss */
  730. +        type = N_BSS | N_EXT;
  731. +        get_num(desc);
  732. +        start = (int)&_bss_start;
  733. +        break;
  734. +      case 0x03e8:      /* name  */
  735. +      case 0x03e7:      /* unit  */
  736. +        skip(desc, get_num(desc));
  737. +        break;
  738. +      case 0x03f1:      /* debug */
  739. +        t = get_num(desc);
  740. +        if (t > 2 && amiga_debug_hunk_size == 0)
  741. +        {
  742. +          char armag[SARMAG];
  743. +
  744. +          fread (armag, 1, SARMAG, desc);
  745. +          if (*((long *)armag) == 0x10107 || !strncmp (armag, ARMAG, SARMAG))
  746. +          {
  747. +            amiga_debug_hunk_size = t * 4;
  748. +            amiga_debug_hunk_offset = ftell(desc) - SARMAG;
  749. +          }
  750. +          t -= 2;
  751. +        }
  752. +        skip(desc, t);
  753. +        break;
  754. +      case 0x03ee:      /* reloc8  */
  755. +      case 0x03ed:      /* reloc16 */
  756. +      case 0x03ec:      /* reloc32 */
  757. +        while (t = get_num(desc))
  758. +          skip(desc, t + 1);
  759. +        break;
  760. +      case 0x03ef:      /* ext */
  761. +        while (t = get_num(desc))
  762. +          skip(desc, (t & 0xffffff) + 1);
  763. +        break;
  764. +      case 0x03f0:      /* symbols */
  765. +        while (t = get_num(desc))
  766. +        {
  767. +          struct nlist nl;
  768. +
  769. +          while (t >= name_size)
  770. +          {
  771. +            char *buf = (char *)_dld_malloc(name_size * 2);
  772. +            
  773. +            free(name);
  774. +            name = buf;
  775. +            name_size *= 2;
  776. +          }
  777. +          fread(name, 1, t * 4, desc);
  778. +          name[t * 4] = 0;
  779. +          nl.n_type = type;
  780. +          nl.n_value = get_num(desc) + start;
  781. +          /* ___gnu_compiled_c is (for some reason) defined twice, so we
  782. +             filter out all multiple defined symbols. */
  783. +          if (!_dld_getsym_soft(name))
  784. +            _dld_enter_global_ref (entry, &nl, name);
  785. +        }
  786. +        break;
  787. +      case 0x03f2:      /* end */
  788. +        l--;
  789. +        break;
  790. +    }
  791. +  }
  792. +  free(name);
  793. +}
  794. +
  795. +#endif /* AMIGA */
  796.  
  797.  /* Allocate memory for all text, data and bss segments and read them in
  798.     from the file. */
  799.  static void
  800.  read_text_and_data (desc, entry)
  801. -int desc;
  802. +FILE *desc;
  803.  register struct file_entry *entry;
  804.  {
  805.      register size = entry->header.a_text + entry->header.a_data +
  806. @@ -1656,9 +1802,9 @@ register struct file_entry *entry;
  807.         Note that the bss segment does not actually take up space in the
  808.         object file, so its size must be subtracted from SIZE */
  809.  
  810. -    lseek (desc, entry->starting_offset + N_TXTOFF(entry->header), 0);
  811. +    fseek (desc, input_offset + entry->starting_offset + N_TXTOFF(entry->header), 0);
  812.      size -= entry->header.a_bss;
  813. -    if (size != read (desc, (char *)entry->text_start_address, size)) {
  814. +    if (size != fread ((char *)entry->text_start_address, 1, size, desc)) {
  815.      free ((void *)entry->text_start_address);
  816.      entry->text_start_address = entry->data_start_address =
  817.          entry->bss_start_address = 0;
  818. @@ -1675,7 +1821,7 @@ register struct file_entry *entry;
  819.     symbols */
  820.  static void
  821.  relocate_entry_symbols (desc, entry)
  822. -int desc;
  823. +FILE *desc;
  824.  register struct file_entry *entry;
  825.  {
  826.      /* Compute start addresses of each sections and symbols.  */
  827. @@ -1759,7 +1905,7 @@ struct file_entry *entry;
  828.   * For those that can, set the flag executable_flag.
  829.   */
  830.  static void
  831. -find_all_executable_modules ()
  832. +find_all_executable_modules (void)
  833.  {
  834.      register struct file_entry *p;
  835.  
  836. @@ -1790,7 +1936,7 @@ find_all_executable_modules ()
  837.      _dld_exec_flags_valid = 1;
  838.  } /* find_all_executable_modules */
  839.  
  840. -
  841. +
  842.  /* remove all reference pointers *TO* ENTRY */
  843.  static void
  844.  remove_cross_references (head_of_chain, entry)
  845. @@ -1973,12 +2119,12 @@ struct file_entry *entry;
  846.      _dld_exec_flags_valid = 0;
  847.      return entry;
  848.  } /* do_unlink */
  849. -
  850. +
  851.  int
  852.  dld_init (myname)
  853.  char *myname;
  854.  {
  855. -    int desc;
  856. +    FILE *desc;
  857.  
  858.      page_size = getpagesize ();
  859.      bzero (_dld_symtab, TABSIZE * sizeof(symbol *));
  860. @@ -1999,6 +2145,11 @@ char *myname;
  861.      }
  862.      _dld_latest_entry = make_entry (myname);
  863.      desc = file_open (_dld_latest_entry);
  864. +#ifdef AMIGA
  865. +    amiga_read_file_symbols (desc, _dld_latest_entry);
  866. +    relocate_symbol_address (_dld_latest_entry);
  867. +#else
  868. +    
  869.  #ifdef atarist
  870.      st_read_header (desc, _dld_latest_entry);
  871.  #endif /* atarist */
  872. @@ -2023,6 +2174,8 @@ char *myname;
  873.      relocate_symbol_address (_dld_latest_entry);
  874.  #endif /* atarist */
  875.  
  876. +#endif /* AMIGA */
  877. +
  878.      if (_dld_latest_entry->symbols) {
  879.      free (_dld_latest_entry->symbols);
  880.      _dld_latest_entry->symbols = 0;
  881. @@ -2040,7 +2193,7 @@ int
  882.  dld_link (object_file)
  883.  char *object_file;
  884.  {
  885. -    register int desc;
  886. +    register FILE *desc;
  887.      struct file_entry *old_latest_entry = _dld_latest_entry;
  888.  
  889.      if (setjmp (_dld_env)) {
  890. @@ -2082,6 +2235,8 @@ char *object_file;
  891.      file_close ();
  892.  
  893.      _dld_patch_all_files (_dld_latest_entry);
  894. +    
  895. +    CacheClearE(0, (ULONG)-1, CACRF_ClearI);   /* clear instruction cache! */
  896.  
  897.      _dld_exec_flags_valid = 0;
  898.      return 0;
  899. diff -rup --new-file baseline/fsf/dld/doc/SPE.ps amiga/fsf/dld/doc/SPE.ps
  900. --- baseline/fsf/dld/doc/SPE.ps    Wed Dec 31 17:00:00 1969
  901. +++ amiga/fsf/dld/doc/SPE.ps    Sat Sep 28 00:00:00 1996
  902. @@ -0,0 +1,8967 @@
  903. +%!PS-Adobe-1.0
  904. +%%Creator: ivy:how (W. Wilson Ho,4435 Chem Annex,2680,9167584811,Prof. Ron Olsson)
  905. +%%Title: stdin (ditroff)
  906. +%%CreationDate: Mon Oct 15 14:10:23 1990
  907. +%%EndComments
  908. +% Start of psdit.pro -- prolog for ditroff translator
  909. +% Copyright (c) 1985,1987 Adobe Systems Incorporated. All Rights Reserved. 
  910. +% GOVERNMENT END USERS: See Notice file in TranScript library directory
  911. +% -- probably /usr/lib/ps/Notice
  912. +% RCS: $Header: psdit.pro,v 2.2 87/11/17 16:40:42 byron Rel $
  913. +/$DITroff 140 dict def $DITroff begin
  914. +/fontnum 1 def /fontsize 10 def /fontheight 10 def /fontslant 0 def
  915. +/xi {0 72 11 mul translate 72 resolution div dup neg scale 0 0 moveto
  916. +  /fontnum 1 def /fontsize 10 def /fontheight 10 def /fontslant 0 def F
  917. +  /pagesave save def}def
  918. +/PB{save /psv exch def currentpoint translate
  919. +  resolution 72 div dup neg scale 0 0 moveto}def
  920. +/PE{psv restore}def
  921. +/m1 matrix def /m2 matrix def /m3 matrix def /oldmat matrix def
  922. +/tan{dup sin exch cos div}bind def
  923. +/point{resolution 72 div mul}bind def
  924. +/dround    {transform round exch round exch itransform}bind def
  925. +/xT{/devname exch def}def
  926. +/xr{/mh exch def /my exch def /resolution exch def}def
  927. +/xp{}def
  928. +/xs{docsave restore end}def
  929. +/xt{}def
  930. +/xf{/fontname exch def /slotno exch def fontnames slotno get fontname eq not
  931. + {fonts slotno fontname findfont put fontnames slotno fontname put}if}def
  932. +/xH{/fontheight exch def F}bind def
  933. +/xS{/fontslant exch def F}bind def
  934. +/s{/fontsize exch def /fontheight fontsize def F}bind def
  935. +/f{/fontnum exch def F}bind def
  936. +/F{fontheight 0 le {/fontheight fontsize def}if
  937. +   fonts fontnum get fontsize point 0 0 fontheight point neg 0 0 m1 astore
  938. +   fontslant 0 ne{1 0 fontslant tan 1 0 0 m2 astore m3 concatmatrix}if
  939. +   makefont setfont .04 fontsize point mul 0 dround pop setlinewidth}bind def
  940. +/X{exch currentpoint exch pop moveto show}bind def
  941. +/N{3 1 roll moveto show}bind def
  942. +/Y{exch currentpoint pop exch moveto show}bind def
  943. +/S /show load def
  944. +/ditpush{}def/ditpop{}def
  945. +/AX{3 -1 roll currentpoint exch pop moveto 0 exch ashow}bind def
  946. +/AN{4 2 roll moveto 0 exch ashow}bind def
  947. +/AY{3 -1 roll currentpoint pop exch moveto 0 exch ashow}bind def
  948. +/AS{0 exch ashow}bind def
  949. +/MX{currentpoint exch pop moveto}bind def
  950. +/MY{currentpoint pop exch moveto}bind def
  951. +/MXY /moveto load def
  952. +/cb{pop}def    % action on unknown char -- nothing for now
  953. +/n{}def/w{}def
  954. +/p{pop showpage pagesave restore /pagesave save def}def
  955. +/abspoint{currentpoint exch pop add exch currentpoint pop add exch}def
  956. +/dstroke{currentpoint stroke moveto}bind def
  957. +/Dl{2 copy gsave rlineto stroke grestore rmoveto}bind def
  958. +/arcellipse{oldmat currentmatrix pop
  959. + currentpoint translate 1 diamv diamh div scale /rad diamh 2 div def
  960. + rad 0 rad -180 180 arc oldmat setmatrix}def
  961. +/Dc{gsave dup /diamv exch def /diamh exch def arcellipse dstroke 
  962. +    grestore diamh 0 rmoveto}def
  963. +/De{gsave /diamv exch def /diamh exch def arcellipse dstroke
  964. +    grestore diamh 0 rmoveto}def
  965. +/Da{currentpoint /by exch def /bx exch def /fy exch def /fx exch def
  966. +   /cy exch def /cx exch def /rad cx cx mul cy cy mul add sqrt def
  967. +   /ang1 cy neg cx neg atan def /ang2 fy fx atan def cx bx add cy by add
  968. +   2 copy rad ang1 ang2 arcn stroke exch fx add exch fy add moveto}def
  969. +/Barray 200 array def % 200 values in a wiggle
  970. +/D~{mark}def
  971. +/D~~{counttomark Barray exch 0 exch getinterval astore /Bcontrol exch def pop
  972. + /Blen Bcontrol length def Blen 4 ge Blen 2 mod 0 eq and
  973. + {Bcontrol 0 get Bcontrol 1 get abspoint /Ycont exch def /Xcont exch def
  974. +  Bcontrol 0 2 copy get 2 mul put Bcontrol 1 2 copy get 2 mul put
  975. +  Bcontrol Blen 2 sub 2 copy get 2 mul put
  976. +  Bcontrol Blen 1 sub 2 copy get 2 mul put
  977. +  /Ybi /Xbi currentpoint 3 1 roll def def 0 2 Blen 4 sub
  978. +  {/i exch def
  979. +   Bcontrol i get 3 div Bcontrol i 1 add get 3 div
  980. +   Bcontrol i get 3 mul Bcontrol i 2 add get add 6 div
  981. +   Bcontrol i 1 add get 3 mul Bcontrol i 3 add get add 6 div
  982. +   /Xbi Xcont Bcontrol i 2 add get 2 div add def
  983. +   /Ybi Ycont Bcontrol i 3 add get 2 div add def
  984. +   /Xcont Xcont Bcontrol i 2 add get add def
  985. +   /Ycont Ycont Bcontrol i 3 add get add def
  986. +   Xbi currentpoint pop sub Ybi currentpoint exch pop sub rcurveto
  987. +  }for dstroke}if}def
  988. +end
  989. +/ditstart{$DITroff begin
  990. + /nfonts 60 def            % NFONTS makedev/ditroff dependent!
  991. + /fonts[nfonts{0}repeat]def
  992. + /fontnames[nfonts{()}repeat]def
  993. +/docsave save def
  994. +}def
  995. +
  996. +% character outcalls
  997. +/oc {/pswid exch def /cc exch def /name exch def
  998. +   /ditwid pswid fontsize mul resolution mul 72000 div def
  999. +   /ditsiz fontsize resolution mul 72 div def
  1000. +   ocprocs name known{ocprocs name get exec}{name cb}
  1001. +   ifelse}def
  1002. +/fractm [.65 0 0 .6 0 0] def
  1003. +/fraction
  1004. + {/fden exch def /fnum exch def gsave /cf currentfont def
  1005. +  cf fractm makefont setfont 0 .3 dm 2 copy neg rmoveto
  1006. +  fnum show rmoveto currentfont cf setfont(\244)show setfont fden show 
  1007. +  grestore ditwid 0 rmoveto} def
  1008. +/oce {grestore ditwid 0 rmoveto}def
  1009. +/dm {ditsiz mul}def
  1010. +/ocprocs 50 dict def ocprocs begin
  1011. +(14){(1)(4)fraction}def
  1012. +(12){(1)(2)fraction}def
  1013. +(34){(3)(4)fraction}def
  1014. +(13){(1)(3)fraction}def
  1015. +(23){(2)(3)fraction}def
  1016. +(18){(1)(8)fraction}def
  1017. +(38){(3)(8)fraction}def
  1018. +(58){(5)(8)fraction}def
  1019. +(78){(7)(8)fraction}def
  1020. +(sr){gsave .05 dm .16 dm rmoveto(\326)show oce}def
  1021. +(is){gsave 0 .15 dm rmoveto(\362)show oce}def
  1022. +(->){gsave 0 .02 dm rmoveto(\256)show oce}def
  1023. +(<-){gsave 0 .02 dm rmoveto(\254)show oce}def
  1024. +(==){gsave 0 .05 dm rmoveto(\272)show oce}def
  1025. +end
  1026. +% DIThacks fonts for some special chars
  1027. +50 dict dup begin
  1028. +/FontType 3 def
  1029. +/FontName /DIThacks def
  1030. +/FontMatrix [.001 0.0 0.0 .001 0.0 0.0] def
  1031. +/FontBBox [-220 -280 900 900] def% a lie but ...
  1032. +/Encoding 256 array def
  1033. +0 1 255{Encoding exch /.notdef put}for
  1034. +Encoding
  1035. + dup 8#040/space put %space
  1036. + dup 8#110/rc put %right ceil
  1037. + dup 8#111/lt put %left  top curl
  1038. + dup 8#112/bv put %bold vert
  1039. + dup 8#113/lk put %left  mid curl
  1040. + dup 8#114/lb put %left  bot curl
  1041. + dup 8#115/rt put %right top curl
  1042. + dup 8#116/rk put %right mid curl
  1043. + dup 8#117/rb put %right bot curl
  1044. + dup 8#120/rf put %right floor
  1045. + dup 8#121/lf put %left  floor
  1046. + dup 8#122/lc put %left  ceil
  1047. + dup 8#140/sq put %square
  1048. + dup 8#141/bx put %box
  1049. + dup 8#142/ci put %circle
  1050. + dup 8#143/br put %box rule
  1051. + dup 8#144/rn put %root extender
  1052. + dup 8#145/vr put %vertical rule
  1053. + dup 8#146/ob put %outline bullet
  1054. + dup 8#147/bu put %bullet
  1055. + dup 8#150/ru put %rule
  1056. + dup 8#151/ul put %underline
  1057. + pop
  1058. +/DITfd 100 dict def
  1059. +/BuildChar{0 begin
  1060. + /cc exch def /fd exch def
  1061. + /charname fd /Encoding get cc get def
  1062. + /charwid fd /Metrics get charname get def
  1063. + /charproc fd /CharProcs get charname get def
  1064. + charwid 0 fd /FontBBox get aload pop setcachedevice
  1065. + 40 setlinewidth
  1066. + newpath 0 0 moveto gsave charproc grestore
  1067. + end}def
  1068. +/BuildChar load 0 DITfd put
  1069. +%/UniqueID 5 def
  1070. +/CharProcs 50 dict def
  1071. +CharProcs begin
  1072. +/space{}def
  1073. +/.notdef{}def
  1074. +/ru{500 0 rls}def
  1075. +/rn{0 750 moveto 500 0 rls}def
  1076. +/vr{20 800 moveto 0 -770 rls}def
  1077. +/bv{20 800 moveto 0 -1000 rls}def
  1078. +/br{20 770 moveto 0 -1040 rls}def
  1079. +/ul{0 -250 moveto 500 0 rls}def
  1080. +/ob{200 250 rmoveto currentpoint newpath 200 0 360 arc closepath stroke}def
  1081. +/bu{200 250 rmoveto currentpoint newpath 200 0 360 arc closepath fill}def
  1082. +/sq{80 0 rmoveto currentpoint dround newpath moveto
  1083. +    640 0 rlineto 0 640 rlineto -640 0 rlineto closepath stroke}def
  1084. +/bx{80 0 rmoveto currentpoint dround newpath moveto
  1085. +    640 0 rlineto 0 640 rlineto -640 0 rlineto closepath fill}def
  1086. +/ci{355 333 rmoveto currentpoint newpath 333 0 360 arc
  1087. +    50 setlinewidth stroke}def
  1088. +
  1089. +/lt{20 -200 moveto 0 550 rlineto currx 800 2cx s4 add exch s4 a4p stroke}def
  1090. +/lb{20 800 moveto 0 -550 rlineto currx -200 2cx s4 add exch s4 a4p stroke}def
  1091. +/rt{20 -200 moveto 0 550 rlineto currx 800 2cx s4 sub exch s4 a4p stroke}def
  1092. +/rb{20 800 moveto 0 -500 rlineto currx -200 2cx s4 sub exch s4 a4p stroke}def
  1093. +/lk{20 800 moveto 20 300 -280 300 s4 arcto pop pop 1000 sub
  1094. +    currentpoint stroke moveto
  1095. +    20 300 4 2 roll s4 a4p 20 -200 lineto stroke}def
  1096. +/rk{20 800 moveto 20 300 320 300 s4 arcto pop pop 1000 sub
  1097. +    currentpoint stroke moveto
  1098. +    20 300 4 2 roll s4 a4p 20 -200 lineto stroke}def
  1099. +/lf{20 800 moveto 0 -1000 rlineto s4 0 rls}def
  1100. +/rf{20 800 moveto 0 -1000 rlineto s4 neg 0 rls}def
  1101. +/lc{20 -200 moveto 0 1000 rlineto s4 0 rls}def
  1102. +/rc{20 -200 moveto 0 1000 rlineto s4 neg 0 rls}def
  1103. +end
  1104. +
  1105. +/Metrics 50 dict def Metrics begin
  1106. +/.notdef 0 def
  1107. +/space 500 def
  1108. +/ru 500 def
  1109. +/br 0 def
  1110. +/lt 250 def
  1111. +/lb 250 def
  1112. +/rt 250 def
  1113. +/rb 250 def
  1114. +/lk 250 def
  1115. +/rk 250 def
  1116. +/rc 250 def
  1117. +/lc 250 def
  1118. +/rf 250 def
  1119. +/lf 250 def
  1120. +/bv 250 def
  1121. +/ob 350 def
  1122. +/bu 350 def
  1123. +/ci 750 def
  1124. +/bx 750 def
  1125. +/sq 750 def
  1126. +/rn 500 def
  1127. +/ul 500 def
  1128. +/vr 0 def
  1129. +end
  1130. +
  1131. +DITfd begin
  1132. +/s2 500 def /s4 250 def /s3 333 def
  1133. +/a4p{arcto pop pop pop pop}def
  1134. +/2cx{2 copy exch}def
  1135. +/rls{rlineto stroke}def
  1136. +/currx{currentpoint pop}def
  1137. +/dround{transform round exch round exch itransform} def
  1138. +end
  1139. +end
  1140. +/DIThacks exch definefont pop
  1141. +
  1142. +ditstart
  1143. +(psc)xT
  1144. +576 1 1 xr
  1145. +1(Times-Roman)xf 1 f
  1146. +2(Times-Italic)xf 2 f
  1147. +3(Times-Bold)xf 3 f
  1148. +4(Times-BoldItalic)xf 4 f
  1149. +5(Helvetica)xf 5 f
  1150. +6(Helvetica-Bold)xf 6 f
  1151. +7(Courier)xf 7 f
  1152. +8(Courier-Bold)xf 8 f
  1153. +9(Symbol)xf 9 f
  1154. +10(DIThacks)xf 10 f
  1155. +10 s
  1156. +1 f
  1157. +xi
  1158. +%%EndProlog
  1159. +5(Helvetica-Narrow)xf 5 f
  1160. +1 f
  1161. +
  1162. +%%Page: 1 1
  1163. +5(Helvetica-Narrow)xf 5 f
  1164. +10 s 0 xH 0 xS 5 f
  1165. +8 s
  1166. +1 f
  1167. +10 s
  1168. +32(--)Y
  1169. +4323(--)X
  1170. +3 f
  1171. +16 s
  1172. +1121 984(An)N
  1173. +1316(Approach)X
  1174. +1895(to)X
  1175. +2034(G)X
  1176. +2134(enuine)X
  1177. +2529(Dynam)X
  1178. +2927(ic)X
  1179. +3052(Linking)X
  1180. +2 f
  1181. +12 s
  1182. +2036 1464(W.)N
  1183. +2164(Wilson)X
  1184. +2455(Ho)X
  1185. +1 f
  1186. +719 1644(Division)N
  1187. +1074(of)X
  1188. +1178(Computer)X
  1189. +1587(Science,)X
  1190. +1935(University)X
  1191. +2365(of)X
  1192. +2469(California,)X
  1193. +2908(Davis,)X
  1194. +3180(CA)X
  1195. +3337(95616,)X
  1196. +3625(U.S.A.)X
  1197. +1734 1764(Email:)N
  1198. +2016(how@cs.ucdavis.edu)X
  1199. +2 f
  1200. +1966 2004(Ronald)N
  1201. +2268(A.)X
  1202. +2375(Olsson)X
  1203. +1 f
  1204. +719 2184(Division)N
  1205. +1074(of)X
  1206. +1178(Computer)X
  1207. +1587(Science,)X
  1208. +1935(University)X
  1209. +2365(of)X
  1210. +2469(California,)X
  1211. +2908(Davis,)X
  1212. +3180(CA)X
  1213. +3337(95616,)X
  1214. +3625(U.S.A.)X
  1215. +1694 2304(Email:)N
  1216. +1976(olsson@cs.ucdavis.edu)X
  1217. +3 f
  1218. +10 s
  1219. +2090 2608(SUMMARY)N
  1220. +1 f
  1221. +12 s
  1222. +576 2816(This)N
  1223. +781(paper)X
  1224. +1029(describes)X
  1225. +1421(a)X
  1226. +1498(new)X
  1227. +1692(approach)X
  1228. +2080(to)X
  1229. +2190(dynamic)X
  1230. +2557(link/unlink)X
  1231. +3015(editing.)X
  1232. +3366(The)X
  1233. +3551(basis)X
  1234. +3778(of)X
  1235. +3893(this)X
  1236. +576 2968(approach)N
  1237. +965(is)X
  1238. +1065(a)X
  1239. +1144(library)X
  1240. +1436(of)X
  1241. +1551(link)X
  1242. +1736(editing)X
  1243. +2039(functions)X
  1244. +2432(that)X
  1245. +2612(can)X
  1246. +2781(add)X
  1247. +2955(compiled)X
  1248. +3349(object)X
  1249. +3620(code)X
  1250. +3837(to)X
  1251. +2 f
  1252. +3947(or)X
  1253. +576 3120(remove)N
  1254. +1 f
  1255. +909(such)X
  1256. +1135(code)X
  1257. +1367(from)X
  1258. +1604(a)X
  1259. +1697(process)X
  1260. +2035(anytime)X
  1261. +2396(during)X
  1262. +2697(its)X
  1263. +2838(execution.)X
  1264. +3311(Loading)X
  1265. +3682(modules,)X
  1266. +576 3272(searching)N
  1267. +982(libraries,)X
  1268. +1359(resolving)X
  1269. +1754(external)X
  1270. +2102(references,)X
  1271. +2559(and)X
  1272. +2735(allocating)X
  1273. +3153(storage)X
  1274. +3468(for)X
  1275. +3616(global)X
  1276. +3893(and)X
  1277. +576 3424(static)N
  1278. +805(data)X
  1279. +991(structures)X
  1280. +1390(are)X
  1281. +1533(all)X
  1282. +1655(performed)X
  1283. +2081(at)X
  1284. +2176(run)X
  1285. +2329(time.)X
  1286. +2575(This)X
  1287. +2772(approach)X
  1288. +3151(provides)X
  1289. +3508(the)X
  1290. +3652(ef\256ciency)X
  1291. +576 3576(of)N
  1292. +688(native)X
  1293. +956(machine)X
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  9894. +setfont}B /ch-width{ch-data dup length 5 sub get}B /ch-height{ch-data dup
  9895. +length 4 sub get}B /ch-xoff{128 ch-data dup length 3 sub get sub}B /ch-yoff{
  9896. +ch-data dup length 2 sub get 127 sub}B /ch-dx{ch-data dup length 1 sub get}B
  9897. +/ch-image{ch-data dup type /stringtype ne{ctr get /ctr ctr 1 add N}if}B /id 0
  9898. +N /rw 0 N /rc 0 N /gp 0 N /cp 0 N /G 0 N /sf 0 N /CharBuilder{save 3 1 roll S
  9899. +dup /base get 2 index get S /BitMaps get S get /ch-data X pop /ctr 0 N ch-dx 0
  9900. +ch-xoff ch-yoff ch-height sub ch-xoff ch-width add ch-yoff setcachedevice
  9901. +ch-width ch-height true[1 0 0 -1 -.1 ch-xoff sub ch-yoff .1 add]{ch-image}
  9902. +imagemask restore}B /D{/cc X dup type /stringtype ne{]}if nn /base get cc ctr
  9903. +put nn /BitMaps get S ctr S sf 1 ne{dup dup length 1 sub dup 2 index S get sf
  9904. +div put}if put /ctr ctr 1 add N}B /I{cc 1 add D}B /bop{userdict /bop-hook
  9905. +known{bop-hook}if /SI save N @rigin 0 0 moveto}N /eop{clear SI restore
  9906. +showpage userdict /eop-hook known{eop-hook}if}N /@start{userdict /start-hook
  9907. +known{start-hook}if /VResolution X /Resolution X 1000 div /DVImag X /IE 256
  9908. +array N 0 1 255{IE S 1 string dup 0 3 index put cvn put}for}N /p /show load N
  9909. +/RMat[1 0 0 -1 0 0]N /BDot 260 string N /rulex 0 N /ruley 0 N /v{/ruley X
  9910. +/rulex X V}B /V statusdict begin /product where{pop product 0 7 getinterval
  9911. +(Display)eq}{false}ifelse end{{gsave TR -.1 -.1 TR 1 1 scale rulex ruley false
  9912. +RMat{BDot}imagemask grestore}}{{gsave TR -.1 -.1 TR rulex ruley scale 1 1
  9913. +false RMat{BDot}imagemask grestore}}ifelse B /a{moveto}B /delta 0 N /tail{dup
  9914. +/delta X 0 rmoveto}B /M{S p delta add tail}B /b{S p tail}B /c{-4 M}B /d{-3 M}
  9915. +B /e{-2 M}B /f{-1 M}B /g{0 M}B /h{1 M}B /i{2 M}B /j{3 M}B /k{4 M}B /w{0
  9916. +rmoveto}B /l{p -4 w}B /m{p -3 w}B /n{p -2 w}B /o{p -1 w}B /q{p 1 w}B /r{p 2 w}
  9917. +B /s{p 3 w}B /t{p 4 w}B /x{0 S rmoveto}B /y{3 2 roll p a}B /bos{/SS save N}B
  9918. +/eos{clear SS restore}B end
  9919. +%%EndProcSet
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  10998. +(a)0 2334 y(sym)o(b)q(ol)h(de\014ned)h(b)o(y)e(that)g(library)h(routine.)24
  10999. +b(The)16 b(function)h Fd(dld_create_reference)d Fj(is)j(designed)h(for)e
  11000. +(this)0 2396 y(purp)q(ose:)120 2533 y Fd(int)23 b(dld_create_reference)f
  11001. +(\(char)h(*)p Ff(name)s Fd(\))0 2670 y Fj(Usually)18 b Ff(name)g
  11002. +Fj(is)f(the)g(name)f(of)g(the)g(library)h(routine)g(that)f(should)h(b)q(e)g
  11003. +(loaded,)g(but)g(it)f(can)h(b)q(e)g(an)o(y)f(sym)o(b)q(ol)p
  11004. +eop
  11005. +%%Page: 7 8
  11006. +bop 971 -58 a Fj(7)0 183 y(de\014ned)15 b(b)o(y)e(that)g(routine.)20
  11007. +b(After)13 b(suc)o(h)h(a)g(reference)g(has)f(b)q(een)i(created,)f(linking)h
  11008. +(the)f(appropriate)g(library)g(b)o(y)0 246 y Fd(dld_link)g
  11009. +Fj(w)o(ould)i(cause)f(the)g(required)i(library)f(routine)f(to)g(b)q(e)h
  11010. +(loaded.)62 383 y(If)e(the)g(call)g(is)g(successful,)h Fd
  11011. +(dld_create_reference)c Fj(returns)i(0;)h(otherwise,)f(it)h(returns)g(a)f
  11012. +(non-zero)h(error)0 445 y(co)q(de)i(\(see)f(Section)h(1.10)e([De\014nition)i
  11013. +(of)f(Error)f(Co)q(des],)h(page)g(8\).)62 582 y(The)e(library)h(routine)f
  11014. +(loaded)h(b)o(y)f(this)g(metho)q(d)g(can)g(b)q(e)h(unlink)o(ed)h(b)o(y)e
  11015. +Fd(dld_unlink_by_symbol)f(\()p Ff(name)s Fd(\))p Fj(.)0 645
  11016. +y(Once)17 b(it)e(has)h(b)q(een)h(unlink)o(ed,)g(the)f(corresp)q(onding)g
  11017. +(reference)h(created)e(b)o(y)h Fd(dld_create_reference)d Fj(is)j(also)0
  11018. +707 y(remo)o(v)o(ed)f(so)f(that)h(this)h(routine)f(will)i(not)e(b)q(e)h
  11019. +(loaded)g(in)g(again)f(b)o(y)g(subsequen)o(t)h(linking)h(of)e(the)g(library)l
  11020. +(.)0 934 y Fe(1.8)35 b(Explicitly)20 b(De\014ning)i(a)h(Sym)n(b)r(ol)62
  11021. +1071 y Fj(Dld)17 b(allo)o(ws)f(a)g(programmer)f(to)g(explicitly)k(de\014ne)e
  11022. +(global)g(sym)o(b)q(ols.)23 b(That)15 b(is,)h(a)g(programmer)f(can)h(force)0
  11023. +1133 y(a)g(sym)o(b)q(ol)i(to)e(ha)o(v)o(e)g(storage)g(assigned)h(for)f(it.)25
  11024. +b(This)17 b(is)h(esp)q(ecially)h(useful)f(in)f(incremen)o(tal)h(program)e
  11025. +(testing)0 1196 y(where)e(the)g(function)g(b)q(eing)h(tested)f(needs)h(to)e
  11026. +(access)h(some)f(global)h(v)m(ariables)i(whic)o(h)e(are)g(de\014ned)h(b)o(y)e
  11027. +(another)0 1258 y(function)19 b(not)f(y)o(et)g(link)o(ed)j(in)e(\(or)e(ev)o
  11028. +(en)i(not)f(y)o(et)g(written\).)30 b(There)19 b(are)f(t)o(w)o(o)f(functions)i
  11029. +(related)g(to)f(explicit)0 1320 y(de\014nition:)120 1458 y
  11030. +Fd(int)23 b(dld_define_sym)f(\(char)i(*)p Ff(name)p Fd(,)f(unsigned)g(int)g
  11031. +Ff(size)s Fd(\))120 1507 y(void)g(dld_remove_defined_symbol)e(\(char)i(*)p
  11032. +Ff(name)s Fd(\))0 1645 y(dld_define_sym)10 b Fj(forces)i(dld)i(to)e(allo)q
  11033. +(cate)h Ff(size)j Fj(b)o(ytes)c(for)f(sym)o(b)q(ol)i Ff(name)p
  11034. +Fj(.)19 b(It)13 b(can)f(b)q(e)h(called)h(b)q(efore)f(or)f(after)f(a)0
  11035. +1707 y(reference)i(to)f Ff(name)j Fj(is)e(made.)19 b(If)12
  11036. +b(references)h(to)f Ff(name)j Fj(already)e(exist)g(when)g(it)f(is)h
  11037. +(de\014ned,)h(all)g(suc)o(h)e(references)0 1769 y(are)j(directed)h(to)f(p)q
  11038. +(oin)o(t)g(to)g(the)g(correct)g(address)g(allo)q(cated)i(for)d
  11039. +Ff(name)p Fj(.)62 1907 y Fd(dld_define_sym)i Fj(returns)h(0)h(if)g
  11040. +(successful.)28 b(Otherwise,)19 b(it)f(returns)f(a)h(non-zero)f(error)g(co)q
  11041. +(de)i(\(see)e(Sec-)0 1969 y(tion)e(1.10)f([De\014nition)j(of)d(Error)h(Co)q
  11042. +(des],)f(page)h(8\).)k(The)d(t)o(ypical)g(error)e(is)i(a)f(m)o(ultiple)i
  11043. +(de\014nition)g(of)e Ff(name)p Fj(.)62 2106 y(When)c(the)f(de\014nition)i(of)
  11044. +e Ff(name)i Fj(is)f(no)f(longer)h(needed,)h(it)e(can)g(b)q(e)h(remo)o(v)o(ed)
  11045. +f(b)o(y)g Fd(dld_remove_define_symbol)p Fj(.)0 2333 y Fe(1.9)35
  11046. +b(Prin)n(ting)22 b(out)h(the)g(Error)h(Messages)62 2470 y Fj(The)19
  11047. +b(function)g Fd(dld_perror)e Fj(prin)o(ts)i(out)f(a)g(short)f(message)h
  11048. +(explaining)j(the)d(error)g(returns)g(b)o(y)h(the)f(last)0
  11049. +2533 y(dld)e(functions:)120 2670 y Fd(void)23 b(dld_perror)g(\(char)g(*)p
  11050. +Ff(user)p Fd(_)p Ff(mesg)t Fd(\))p eop
  11051. +%%Page: 8 9
  11052. +bop 971 -58 a Fj(8)0 183 y(where)15 b Ff(user)p Fd(_)p Ff(mesg)k
  11053. +Fj(is)d(a)f(user-supplied)j(string)d(prep)q(ended)i(to)e(the)g(error)f
  11054. +(message.)0 407 y Fe(1.10)36 b(De\014nition)21 b(of)i(Error)h(Co)r(des)62
  11055. +544 y Fj(The)19 b(dld)g(functions)g(return)f(a)f(non-zero)i(error)e(co)q(de)i
  11056. +(when)f(they)g(fail.)30 b(The)18 b(de\014nitions)i(of)d(these)i(error)0
  11057. +607 y(co)q(des)d(are:)120 730 y Fd(DLD_ENOFILE)186 b Fj(cannot)15
  11058. +b(op)q(en)h(\014le.)120 792 y Fd(DLD_EBADMAGIC)138 b Fj(bad)15
  11059. +b(magic)h(n)o(um)o(b)q(er.)120 854 y Fd(DLD_EBADHEADER)114
  11060. +b Fj(failure)16 b(reading)g(header.)120 916 y Fd(DLD_ENOTEXT)186
  11061. +b Fj(premature)15 b(eof)g(in)h(text)f(section.)120 979 y Fd(DLD_ENOSYMBOLS)
  11062. +114 b Fj(premature)15 b(eof)g(in)h(sym)o(b)q(ols.)120 1041
  11063. +y Fd(DLD_ENOSTRINGS)114 b Fj(bad)15 b(string)h(table.)120 1103
  11064. +y Fd(DLD_ENOTXTRELOC)90 b Fj(premature)15 b(eof)g(in)h(text)f(relo)q(cation.)
  11065. +120 1165 y Fd(DLD_ENODATA)186 b Fj(premature)15 b(eof)g(in)h(data)e(section.)
  11066. +120 1228 y Fd(DLD_ENODATRELOC)90 b Fj(premature)15 b(eof)g(in)h(data)e(relo)q
  11067. +(cation.)120 1290 y Fd(DLD_EMULTDEFS)138 b Fj(m)o(ultiple)17
  11068. +b(de\014nitions)g(of)e(sym)o(b)q(ol.)120 1352 y Fd(DLD_EBADLIBRARY)90
  11069. +b Fj(malformed)15 b(library)h(arc)o(hiv)o(e.)120 1414 y Fd(DLD_EBADCOMMON)114
  11070. +b Fj(common)15 b(blo)q(c)o(k)h(not)f(supp)q(orted.)120 1477
  11071. +y Fd(DLD_EBADOBJECT)114 b Fj(malformed)15 b(input)h(\014le)h(\(not)d(ob)s
  11072. +(ject)h(\014le)h(or)f(arc)o(hiv)o(e\).)120 1539 y Fd(DLD_EBADRELOC)138
  11073. +b Fj(bad)15 b(relo)q(cation)h(info.)120 1601 y Fd(DLD_ENOMEMORY)138
  11074. +b Fj(virtual)16 b(memory)e(exhausted.)120 1664 y Fd(DLD_EUNDEFSYM)138
  11075. +b Fj(unde\014ned)17 b(sym)o(b)q(ol.)p eop
  11076. +%%Trailer
  11077. +end
  11078. +userdict /end-hook known{end-hook}if
  11079. +%%EOF
  11080. diff -rup --new-file baseline/fsf/dld/doc/dld.texinfo amiga/fsf/dld/doc/dld.texinfo
  11081. --- baseline/fsf/dld/doc/dld.texinfo    Wed Dec 31 17:00:00 1969
  11082. +++ amiga/fsf/dld/doc/dld.texinfo    Sat Sep 28 00:00:00 1996
  11083. @@ -0,0 +1,509 @@
  11084. +\input texinfo @c -*- texinfo -*-
  11085. +@c %**start of header
  11086. +@setfilename dld.info
  11087. +@settitle Dld
  11088. +@c %**end of header
  11089. +
  11090. +@iftex
  11091. +@finalout
  11092. +@end iftex
  11093. +
  11094. +@ifinfo
  11095. +This file documents dld, a dynamic link/unlink editor.
  11096. +
  11097. +This is edition 1.2 of the dld documentation.
  11098. +
  11099. +Copyright (C) 1991 W. Wilson Ho.
  11100. +
  11101. +Permission is granted to make and distribute verbatim copies of
  11102. +this manual provided the copyright notice and this permission notice
  11103. +are preserved on all copies.
  11104. +
  11105. +Permission is granted to copy and distribute modified versions of this
  11106. +manual under the conditions for verbatim copying, provided that the entire
  11107. +resulting derived work is distributed under the terms of a permission
  11108. +notice identical to this one.
  11109. +@end ifinfo
  11110. +
  11111. +@iftex
  11112. +@titlepage
  11113. +@title Dld
  11114. +@subtitle A Dynamic Link/Unlink Editor
  11115. +@subtitle Version 3.2.3.
  11116. +@subtitle Copyright @copyright{} 1991 W. Wilson Ho.
  11117. +@author by W. Wilson Ho
  11118. +@end titlepage
  11119. +@setchapternewpage off
  11120. +@headings off
  11121. +@everyheading @| @thispage @|
  11122. +@end iftex
  11123. +
  11124. +@node Top, dld_init, (dir), (dir)
  11125. +@comment  node-name,  next,  previous,  up
  11126. +@chapter What is dld?
  11127. +
  11128. +@dfn{Dld} is a library package of C functions that performs @dfn{dynamic
  11129. +link editing}.  Programs that use dld can add compiled object
  11130. +code to or remove such code from a process anytime during its execution.
  11131. +Loading modules, searching libraries, resolving external references, and
  11132. +allocating storage for global and static data structures are all
  11133. +performed at run time.
  11134. +
  11135. +Dld is now available for VAX, Sun 3, SPARCstation, Sequent Symmetry, and
  11136. +Atari ST.
  11137. +
  11138. +This text describes how the dld functions can be called and some
  11139. +technical details that should be aware of.  For the internals of dld and
  11140. +sample applications, please refer to @cite{An Approach to Genuine
  11141. +Dynamic Linking}, Software--Practice and Experirnce, Vol. 21(4), 375-390
  11142. +(April 1991).  An early draft of that paper is included with this
  11143. +distribution.
  11144. +
  11145. +@menu
  11146. +* dld_init::            Initializing Dld
  11147. +* dld_link::            Dynamically Linking in New Modules
  11148. +* dld_unlink::            Unlinking a Module
  11149. +* dld_get_func::        Invoking Dynamically Linked Functions
  11150. +* Executability::        Determining If a Function is Executable
  11151. +* dld_list_undefined_sym::    Listing the Undefined Symbols
  11152. +* dld_create_reference::    Explicitly Referencing a Symbol
  11153. +* Explicit Definition::        Explicitly Defining a Symbol
  11154. +* dld_perror::            Printing out the Error Messages
  11155. +* Error Codes::            Definition of Error Codes
  11156. +@end menu
  11157. +
  11158. +@node dld_init, dld_link, Top, Top
  11159. +@comment  node-name,  next,  previous,  up
  11160. +@section Initializing Dld
  11161. +
  11162. +To use any of the dld functions, you must include the header file
  11163. +@code{dld.h} for declaration of the functions and definition of the
  11164. +error code constants.
  11165. +
  11166. +The function @code{dld_init} must be called before any other dld
  11167. +functions.  It has the following syntax:
  11168. +
  11169. +@example
  11170. +int dld_init (char *@var{path})
  11171. +@end example
  11172. +
  11173. +@noindent
  11174. +where @var{path} is a string containing the path name of the executable
  11175. +file of the executing process.
  11176. +
  11177. +This function initializes internal data structures of dld and
  11178. +loads into memory symbol definitions of the executing process.  By doing
  11179. +so, other dynamically loaded functions can reference symbols already
  11180. +defined or share functions already exist in the executing process.
  11181. +
  11182. +@code{dld_init} returns 0 when successful; otherwise, it returns an
  11183. +error code that is non-zero (@pxref{Error Codes, , Definition of Error
  11184. +Codes}).  
  11185. +
  11186. +@menu
  11187. +* dld_find_executable::        Locating the Executable File
  11188. +@end menu
  11189. +
  11190. +@node dld_find_executable,  , dld_init, dld_init
  11191. +@comment  node-name,  next,  previous,  up
  11192. +@subsection Locating the Executable File
  11193. +
  11194. +The path name of the executing process as required by @code{dld_init}
  11195. +might not be easily obtained all the time.  Not all systems passes the
  11196. +entire path name of the executable file as the first argument
  11197. +(@code{argv[0]}) to @code{main}.  In order to obtain the full path of
  11198. +the executable file, the @code{dld_find_executable} function can be
  11199. +used.  This function has the following syntax:
  11200. +
  11201. +@example
  11202. +char *dld_find_executable (char *@var{command})
  11203. +@end example
  11204. +
  11205. +@noindent
  11206. +@code{dld_find_executable} returns the absolute path name of the file
  11207. +that would be executed if @var{command} were given as a command.  It
  11208. +looks up the environment variable @var{PATH}, searches in each of the
  11209. +directory listed for @var{command}, and returns the absolute path name
  11210. +for the first occurrence.  Thus, it is advisable to invoke
  11211. +@code{dld_init} as:
  11212. +
  11213. +@example
  11214. +main (int argc, char **argv)
  11215. +@{
  11216. +    @dots{}
  11217. +    if (dld_init (dld_find_executable (argv[0]))) @{
  11218. +        @dots{}
  11219. +    @}
  11220. +    @dots{}
  11221. +@}
  11222. +@end example
  11223. +
  11224. +@quotation
  11225. +@strong{Note:} If the current process is executed using the
  11226. +@code{execve} call without passing the correct path name as argument 0,
  11227. +@code{dld_find_executable (argv[0]) } will also fail to locate the
  11228. +executable file.
  11229. +@end quotation
  11230. +
  11231. +@code{dld_find_executable} returns zero if @code{command} is not found
  11232. +in any of the directories listed in @code{PATH}.
  11233. +
  11234. +@node dld_link, dld_unlink, dld_init, Top
  11235. +@comment  node-name,  next,  previous,  up
  11236. +@section Dynamically Linking in New Modules
  11237. +
  11238. +The function @code{dld_link} dynamically links in the named relocatable
  11239. +object or library file into memory.  It has the following syntax:
  11240. +
  11241. +@example
  11242. +int dld_link (char *@var{filename})
  11243. +@end example
  11244. +
  11245. +@noindent
  11246. +where @var{filename} is the path name of the file to be linked.
  11247. +Specifically, if the named file is a relocatable object file, it is
  11248. +completely loaded into memory.  If it is a library file, only those
  11249. +modules defining an unresolved external reference are loaded.  Since a
  11250. +module in the library may itself reference other routines in the
  11251. +library, loading it may generate more unresolved external references.
  11252. +Therefore, a library file is searched repeatedly until a scan through
  11253. +all library members is made without having to load any new modules.
  11254. +
  11255. +Storage for the text and data of the dynamically linked modules is
  11256. +allocated using @code{malloc}.  In other words, they are kept in the
  11257. +@emph{heap} of the executing process.
  11258. +
  11259. +After all modules are loaded, @code{dld_link} resolves as many external
  11260. +references as possible.  Note that some symbols might still be undefined
  11261. +at this stage, because the modules defining them have not yet been
  11262. +loaded.
  11263. +
  11264. +If the specified module is linked successfully, @code{dld_link} returns
  11265. +0; otherwise, it returns a non-zero error code (@pxref{Error Codes, ,
  11266. +Definition of Error Codes}).
  11267. +
  11268. +@node dld_unlink, dld_get_func, dld_link, Top
  11269. +@comment  node-name,  next,  previous,  up
  11270. +@section Unlinking a Module
  11271. +
  11272. +The major difference between dld and other dynamic linker is that
  11273. +dld allows object modules to be removed from the process anytime
  11274. +during execution.  Unlinking a module is simply the reverse of the link
  11275. +operation (@pxref{Side Effect, , Important Points in Using Unlink}).
  11276. +The specified module is removed and the memory allocated to it is
  11277. +reclaimed.  Additionally, resolution of external references must be
  11278. +undone.
  11279. +
  11280. +There are two unlink functions:
  11281. +
  11282. +@example
  11283. +int dld_unlink_by_file (char *@var{path}, int @var{hard})
  11284. +
  11285. +int dld_unlink_by_symbol (char *@var{id}, int @var{hard})
  11286. +@end example
  11287. +
  11288. +@noindent
  11289. +The two unlink functions are basically the same except that
  11290. +@code{dld_unlink_by_file} takes as argument the path name (@var{path})
  11291. +of a file corresponding to a module previously linked in by
  11292. +@code{dld_link}, but @code{dld_unlink_by_symbol} unlinks the module that
  11293. +defines the specified symbol (@var{id}).
  11294. +
  11295. +Both functions take a second argument @var{hard}.  When @var{hard}
  11296. +is non-zero (@dfn{hard unlink}), the specified module is removed from
  11297. +memory unconditionally.  On the other hand, if @var{hard} is zero
  11298. +(@dfn{soft unlink}), this module is removed from memory only if it is
  11299. +not referenced by any other modules.  Furthermore, if unlinking a module
  11300. +results in leaving some other modules being unreferenced, these
  11301. +unreferenced modules are also removed.
  11302. +
  11303. +Hard unlink is usually used when you want to explicitly remove a module
  11304. +and probably replace it by a different module with the same name.  For
  11305. +example, you may want to replace the system's @code{printf} by your own
  11306. +version.  When you link in your version of @code{printf}, dld
  11307. +will automatically redirect all references to @code{printf} to the new
  11308. +version.
  11309. +
  11310. +Soft unlink should be used when you are not sure if the specified module
  11311. +is still needed.  If you just want to clean up unnecessary functions, it
  11312. +is always safe to use soft unlink.
  11313. +
  11314. +Both unlink functions returns 0 if the specified object file or symbol
  11315. +is previously loaded.  Otherwise, they return a non-zero error code
  11316. +(@pxref{Error Codes, , Definition of Error Codes}).
  11317. +
  11318. +@menu
  11319. +* Side Effect::            Important Points in Using Unlink.
  11320. +@end menu
  11321. +
  11322. +@node Side Effect,  , dld_unlink, dld_unlink
  11323. +@comment  node-name,  next,  previous,  up
  11324. +@subsection Important Points in Using Unlink
  11325. +
  11326. +When a module is being unlinked, dld tries to clean up as much as
  11327. +it can to restore the executing process to a state as if this module has
  11328. +never been linked.  This clean up includes removing and reclaiming the
  11329. +memory for storing the text and data segment of the module, and
  11330. +@dfn{un-defining} any global symbols defined by this module.
  11331. +
  11332. +However, side effects---such as modification of global variables,
  11333. +input/output operations, and allocations of new memory blocks---caused
  11334. +by the execution of any function in this module are not reversed.  Thus,
  11335. +it is the responsibility of the programmer to explicitly carry out all
  11336. +necessary clean up operations before unlinking a module.
  11337. +
  11338. +@node dld_get_func, Executability, dld_unlink, Top
  11339. +@comment  node-name,  next,  previous,  up
  11340. +@section Invoking Dynamically Linked Functions
  11341. +
  11342. +Dynamically linked functions may still be invoked from modules (e.g.,
  11343. +@code{main}) that do not contain references to such functions.  The
  11344. +function @code{dld_get_func} returns the entry point of the named
  11345. +function.  This returned value can later be used as a pointer to the
  11346. +function.  Similarly, the address of a global variable can be obtained
  11347. +by the function @code{dld_get_symbol}:
  11348. +
  11349. +@group
  11350. +@example
  11351. +unsigned long dld_get_symbol (char *@var{id})
  11352. +
  11353. +unsigned long dld_get_func (char *@var{func})
  11354. +@end example
  11355. +@end group
  11356. +
  11357. +@noindent
  11358. +A typical use of @code{dld_get_func} would be:
  11359. +
  11360. +@group
  11361. +@example
  11362. +@{
  11363. +    void (*func) ();
  11364. +    int error_code;
  11365. +
  11366. +    @dots{}
  11367. +
  11368. +    /* First, link in the object file "my_object_file.o".
  11369. +       Proceed only if the link operation is successful, i.e. it returns 0.
  11370. +       "my_new_func" is a function defined in "my_object_file.o".
  11371. +       Set func to point at the entry point of this function and then
  11372. +       Invoke it indirectly through func. */
  11373. +
  11374. +    if ((error_code = dld_link ("my_object_file.o")) == 0) @{
  11375. +        if ((func = (void (*) ()) get_func ("my_new_func")) != 0)
  11376. +            (*func) ();
  11377. +        @dots{}
  11378. +    @} else @{
  11379. +
  11380. +    @dots{}
  11381. +    @}
  11382. +@}
  11383. +@end example
  11384. +@end group
  11385. +
  11386. +Both @code{dld_get_func} and @code{dld_get_symbol} return zero if the
  11387. +named function or symbol cannot be found.
  11388. +
  11389. +@node Executability, dld_list_undefined_sym, dld_get_func, Top
  11390. +@comment  node-name,  next,  previous,  up
  11391. +@section Determining If a Function is Executable
  11392. +
  11393. +Since dld allows modules to be added to or removed from an executing
  11394. +process dynamically, some global symbols may not be defined.  As a
  11395. +result, an invocation of a function might reference an undefined symbol.
  11396. +We say that a function is @dfn{executable} if and only if all its
  11397. +external references have been fully resolved and all functions that it
  11398. +might call are executable.
  11399. +
  11400. +The predicate function @code{dld_function_executable_p} helps solve this
  11401. +problem by tracing the cross references between modules and returns
  11402. +non-zero only if the named function is executable.  It has the following
  11403. +syntax:
  11404. +
  11405. +@example
  11406. +int dld_function_executable_p (char *@var{func})
  11407. +@end example
  11408. +
  11409. +Note that the implementation of @code{dld_function_executable_p} is not
  11410. +complete according to the (recursive) definition of executability.
  11411. +External references through pointers are not traced.  That is,
  11412. +@code{dld_function_executable_p} will still return non-zero if the named
  11413. +function uses a pointer to indirectly call another function which has
  11414. +already been unlinked.  Furthermore, if one external reference of a
  11415. +object module is unresolved, all functions defined in this module are
  11416. +considered unexecutable.  Therefore, @code{dld_function_executable_p} is
  11417. +usually too conservative.
  11418. +
  11419. +However, it is advisable to use @code{dld_function_executable_p} to
  11420. +check if a function is executable before its invocation.  In such a
  11421. +dynamic environment where object modules are being added and removed, a
  11422. +function that is executable at one point in time might not be executable
  11423. +at another.  Under most circumstances, @code{dld_function_executable_p}
  11424. +is accurate.  Also, the implementation of this function has been
  11425. +optimized and it is relatively cheap to use.
  11426. +
  11427. +@node  dld_list_undefined_sym, dld_create_reference, Executability, Top
  11428. +@comment  node-name,  next,  previous,  up
  11429. +@section Listing the Undefined Symbols
  11430. +
  11431. +The function @code{dld_list_undefined_sym} returns an array of undefined
  11432. +global symbol names.  It has the following syntax:
  11433. +
  11434. +@example
  11435. +char **dld_list_undefined_sym ()
  11436. +@end example
  11437. +
  11438. +@noindent
  11439. +The list returned contains all the symbols that have been referenced
  11440. +by some modules but have not been defined.  This function is designed
  11441. +for debugging, especially in the case when a function is found to be not
  11442. +executable but you do not know what the missing symbols are.
  11443. +
  11444. +The length of the array is given by the global variable
  11445. +@code{dld_undefined_sym_count}, which always holds the current total
  11446. +number of undefined global symbols.  Note that all C symbols are listed
  11447. +in their internal representation---i.e., they are prefixed by the
  11448. +underscore character @samp{_}.
  11449. +
  11450. +Storage for the array returned is allocated by @code{malloc}.  It is the
  11451. +programmer's responsibility to release this storage by @code{free} when
  11452. +it is not needed anymore.
  11453. +
  11454. +@node dld_create_reference, Explicit Definition, dld_list_undefined_sym, Top
  11455. +@comment  node-name,  next,  previous,  up
  11456. +@section Explicitly Referencing a Symbol
  11457. +
  11458. +Normally, a library module is loaded only when it defines one of more
  11459. +symbols that has been referenced.  To force a library routine to be
  11460. +loaded, one need to explicitly create a reference to a symbol defined by
  11461. +that library routine.  The function @code{dld_create_reference} is
  11462. +designed for this purpose:
  11463. +
  11464. +@example
  11465. +int dld_create_reference (char *@var{name})
  11466. +@end example
  11467. +
  11468. +@noindent
  11469. +Usually @var{name} is the name of the library routine that should be
  11470. +loaded, but it can be any symbol defined by that routine.  After such a
  11471. +reference has been created, linking the appropriate library by
  11472. +@code{dld_link} would cause the required library routine to be loaded.
  11473. +
  11474. +If the call is successful, @code{dld_create_reference} returns 0;
  11475. +otherwise, it returns a non-zero error code (@pxref{Error Codes, ,
  11476. +Definition of Error Codes}).
  11477. +
  11478. +The library routine loaded by this method can be unlinked by
  11479. +@code{dld_unlink_by_symbol (@var{name})}.  Once it has been unlinked,
  11480. +the corresponding reference created by @code{dld_create_reference} is
  11481. +also removed so that this routine will not be loaded in again by
  11482. +subsequent linking of the library.
  11483. +
  11484. +@node Explicit Definition, dld_perror, dld_create_reference, Top
  11485. +@comment  node-name,  next,  previous,  up
  11486. +@section Explicitly Defining a Symbol
  11487. +
  11488. +Dld allows a programmer to explicitly define global symbols.  That is, a
  11489. +programmer can force a symbol to have storage assigned for it.  This is
  11490. +especially useful in incremental program testing where the function
  11491. +being tested needs to access some global variables which are defined by
  11492. +another function not yet linked in (or even not yet written).  There are
  11493. +two functions related to explicit definition:
  11494. +
  11495. +@example
  11496. +int dld_define_sym (char *@var{name}, unsigned int @var{size})
  11497. +void dld_remove_defined_symbol (char *@var{name})
  11498. +@end example
  11499. +
  11500. +@noindent
  11501. +@code{dld_define_sym} forces dld to allocate @var{size} bytes for symbol
  11502. +@var{name}.  It can be called before or after a reference to @var{name}
  11503. +is made.  If references to @var{name} already exist when it is defined,
  11504. +all such references are directed to point to the correct address
  11505. +allocated for @var{name}.
  11506. +
  11507. +@code{dld_define_sym} returns 0 if successful.  Otherwise, it returns a
  11508. +non-zero error code (@pxref{Error Codes, , Definition of Error Codes}).
  11509. +The typical error is a multiple definition of @var{name}.
  11510. +
  11511. +When the definition of @var{name} is no longer needed, it can be removed
  11512. +by @code{dld_remove_define_symbol}.
  11513. +
  11514. +@node dld_perror, Error Codes, Explicit Definition, Top
  11515. +@comment  node-name,  next,  previous,  up
  11516. +@section Printing out the Error Messages
  11517. +
  11518. +The function @code{dld_perror} prints out a short message explaining the
  11519. +error returns by the last dld functions:
  11520. +
  11521. +@example
  11522. +void dld_perror (char *@var{user_mesg})
  11523. +@end example
  11524. +
  11525. +@noindent
  11526. +where @var{user_mesg} is a user-supplied string prepended to the error
  11527. +message. 
  11528. +
  11529. +@node Error Codes,  , dld_perror, Top
  11530. +@comment  node-name,  next,  previous,  up
  11531. +@section Definition of Error Codes
  11532. +
  11533. +The dld functions return a non-zero error code when they fail.  The
  11534. +definitions of these error codes are:
  11535. +
  11536. +@group
  11537. +@quotation
  11538. +@iftex
  11539. +@tableindent = 1.5in
  11540. +@end iftex
  11541. +@table @code
  11542. +@item DLD_ENOFILE
  11543. +cannot open file.
  11544. +
  11545. +@item DLD_EBADMAGIC
  11546. +bad magic number.
  11547. +
  11548. +@item DLD_EBADHEADER
  11549. +failure reading header.
  11550. +
  11551. +@item DLD_ENOTEXT
  11552. +premature eof in text section.
  11553. +
  11554. +@item DLD_ENOSYMBOLS
  11555. +premature eof in symbols.
  11556. +
  11557. +@item DLD_ENOSTRINGS
  11558. +bad string table.
  11559. +
  11560. +@item DLD_ENOTXTRELOC
  11561. +premature eof in text relocation.
  11562. +
  11563. +@item DLD_ENODATA
  11564. +premature eof in data section.
  11565. +
  11566. +@item DLD_ENODATRELOC
  11567. +premature eof in data relocation.
  11568. +
  11569. +@item DLD_EMULTDEFS
  11570. +multiple definitions of symbol.
  11571. +
  11572. +@item DLD_EBADLIBRARY
  11573. +malformed library archive.
  11574. +
  11575. +@item DLD_EBADCOMMON
  11576. +common block not supported.
  11577. +
  11578. +@item DLD_EBADOBJECT
  11579. +malformed input file (not object file or archive).
  11580. +
  11581. +@item DLD_EBADRELOC
  11582. +bad relocation info.
  11583. +
  11584. +@item DLD_ENOMEMORY
  11585. +virtual memory exhausted.
  11586. +
  11587. +@item DLD_EUNDEFSYM
  11588. +undefined symbol.
  11589. +@end table
  11590. +@end quotation
  11591. +@end group
  11592. +@bye
  11593. diff -rup --new-file baseline/fsf/dld/find_exec.c amiga/fsf/dld/find_exec.c
  11594. --- baseline/fsf/dld/find_exec.c    Fri Feb 10 06:10:46 1995
  11595. +++ amiga/fsf/dld/find_exec.c    Sat Sep 28 00:00:00 1996
  11596. @@ -38,7 +38,7 @@ static char *
  11597.  copy_of (s)
  11598.  register char *s;
  11599.  {
  11600. -    register char *p = (char *) malloc (strlen(s)+1);
  11601. +    register char *p = (char *) malloc (strlen(s)+2);
  11602.  
  11603.      if (!p) return 0;
  11604.  
  11605. diff -rup --new-file baseline/fsf/dld/gxxload.cc amiga/fsf/dld/gxxload.cc
  11606. --- baseline/fsf/dld/gxxload.cc    Sat Mar 18 21:49:56 1995
  11607. +++ amiga/fsf/dld/gxxload.cc    Sat Sep 28 00:00:00 1996
  11608. @@ -1,5 +1,6 @@
  11609. +#include <stdlib.h>
  11610.  #include <stdio.h>
  11611. -#include <string.h>
  11612. +#include </ade/include/string.h>
  11613.  
  11614.  #include <dld.h>
  11615.  
  11616. @@ -80,6 +81,6 @@ void dyn_unload(char * name)
  11617.      if (strncmp(symbol,"_GLOBAL_$D",10) ) continue;
  11618.      symbol[strlen(symbol) - 1] = '\0';
  11619.      addr = (func_ptr) dld_get_func(symbol);
  11620. -    if (addr != 0) (*addr)();
  11621. +    if (addr != 0 && dld_function_executable_p(symbol)) (*addr)();
  11622.    }
  11623.  }
  11624. diff -rup --new-file baseline/fsf/dld/manifests/src amiga/fsf/dld/manifests/src
  11625. --- baseline/fsf/dld/manifests/src    Wed Dec 31 17:00:00 1969
  11626. +++ amiga/fsf/dld/manifests/src    Sat Sep 28 00:00:00 1996
  11627. @@ -0,0 +1,60 @@
  11628. +fsf/dld/.name
  11629. +fsf/dld/COPYING
  11630. +fsf/dld/ChangeLog
  11631. +fsf/dld/Makefile
  11632. +fsf/dld/Product-Info
  11633. +fsf/dld/README
  11634. +fsf/dld/TAGS
  11635. +fsf/dld/TODO
  11636. +fsf/dld/ar2hunk.c
  11637. +fsf/dld/define.c
  11638. +fsf/dld/defs.h
  11639. +fsf/dld/dld-3.2.6.lsm
  11640. +fsf/dld/dld.c
  11641. +fsf/dld/dld.h
  11642. +fsf/dld/dld.texinfo
  11643. +fsf/dld/doc/SPE.ps
  11644. +fsf/dld/doc/dld.ps
  11645. +fsf/dld/doc/dld.texinfo
  11646. +fsf/dld/error.c
  11647. +fsf/dld/find_exec.c
  11648. +fsf/dld/get_func.c
  11649. +fsf/dld/get_symbol.c
  11650. +fsf/dld/gxxload.cc
  11651. +fsf/dld/list_undef.c
  11652. +fsf/dld/manifests/src
  11653. +fsf/dld/mk_dummy.c
  11654. +fsf/dld/readme.amiga
  11655. +fsf/dld/ref.c
  11656. +fsf/dld/remove.c
  11657. +fsf/dld/showsyms.c
  11658. +fsf/dld/test/EXPECTED-OUTPUT
  11659. +fsf/dld/test/Makefile
  11660. +fsf/dld/test/SAMPLE_INPUT
  11661. +fsf/dld/test/add1.c
  11662. +fsf/dld/test/add2.c
  11663. +fsf/dld/test/call_add1.c
  11664. +fsf/dld/test/call_add2.c
  11665. +fsf/dld/test/chain1.c
  11666. +fsf/dld/test/chain2.c
  11667. +fsf/dld/test/chain3.c
  11668. +fsf/dld/test/get-sym.c
  11669. +fsf/dld/test/gxxtest.cc
  11670. +fsf/dld/test/hello.c
  11671. +fsf/dld/test/list-undefined.c
  11672. +fsf/dld/test/main.c
  11673. +fsf/dld/test/need.c
  11674. +fsf/dld/test/overlay.c
  11675. +fsf/dld/test/print_arg.c
  11676. +fsf/dld/test/print_global.c
  11677. +fsf/dld/test/read-a.out.c
  11678. +fsf/dld/test/reload-test.c
  11679. +fsf/dld/test/reload-test.s
  11680. +fsf/dld/test/reload.c
  11681. +fsf/dld/test/remove.c
  11682. +fsf/dld/test/simple.c
  11683. +fsf/dld/test/sub.cc
  11684. +fsf/dld/test/test-define.c
  11685. +fsf/dld/ul_file.c
  11686. +fsf/dld/ul_symbol.c
  11687. +fsf/dld/wrap.c
  11688. diff -rup --new-file baseline/fsf/dld/readme.amiga amiga/fsf/dld/readme.amiga
  11689. --- baseline/fsf/dld/readme.amiga    Wed Dec 31 17:00:00 1969
  11690. +++ amiga/fsf/dld/readme.amiga    Sat Sep 28 00:00:00 1996
  11691. @@ -0,0 +1,114 @@
  11692. +A few notes on this Amiga port of dld-3.2.6, the GNU dynamic link editor.
  11693. +
  11694. +The original archive is available (among other places) from prep.ai.mit.edu
  11695. +in pub/gnu/jacal/dld-3.2.6.tar.gz. It is the successor of dld-3.2.3.tar.gz
  11696. +in the directory pub/gnu. It fixes at least one bug and adds c++ support, so
  11697. +that's why I chose this one to work from.
  11698. +
  11699. +When I started looking at dld I didn't expect that it could work at all on
  11700. +the Amiga, let alone with a relatively minor porting effort. However, I was
  11701. +able to compile the dld-library in one go, so the code itself was clean.
  11702. +After reading through the code I saw that the dld_init function reads the
  11703. +symbols of the variables in the executable and their values in a list.
  11704. +Other functions do the same thing for objects and *.a archives. The format
  11705. +used by GCC for objects and archives is currently identical to the BSD
  11706. +format, which was also used in dld. So, that part worked OK.
  11707. +
  11708. +The executable, however, uses hunks to store the symbols, so all I had to
  11709. +do was to add a function that would scan the executable for the symbols and
  11710. +figure out their real values. After implementing that, I suddenly had a
  11711. +working version of dld. Most of the tests ran without a problem (except for
  11712. +one or two weird ones that depend on a Unix process environment).
  11713. +
  11714. +The implementation of the symbol hunk scan was done in two stages: the first
  11715. +stage was to make a program to list all the symbols, the second stage patched
  11716. +that into dld. The scanning program is useful in its own right, so I
  11717. +included it in this archive (showsyms.c). I also changed the file reads and
  11718. +seeks to their buffered counterparts (fread, fseek) improving the
  11719. +performance.
  11720. +
  11721. +Now, this is all very nice, but it doesn't make it possible to use it as
  11722. +you would use a shared library. After all, you have to do a dld_init, get
  11723. +all the values of the functions you want to call using dld_get_symbol, etc.
  11724. +However, with a bit of thought I was able to put it to that use.
  11725. +
  11726. +The idea is to realize that for every program you do know one entry point:
  11727. +main. So I made a wrapper program, which initializes dld, forces it to link
  11728. +with the real program, using 'main' as a reference (more about that later),
  11729. +specifying the libraries to use for resolving all externals, and then it
  11730. +asks for the address of the main function of the program you want to call,
  11731. +dld finds at for you, resolving all externals and loading all the code and
  11732. +data stuff in the process. Then you call that function. So you need this
  11733. +wrapper program to start up the real program.
  11734. +
  11735. +The 'real' program cannot be a executable, as the normal linker would then
  11736. +try to resolve all externals, which is precisely what you do not want.
  11737. +Instead, the program is either a single object or a group of objects. In
  11738. +the last case you must pull them together into one *.a archive. Don't
  11739. +forget to 'ranlib' this!
  11740. +
  11741. +Unfortunately, the main function of your program must be redefined to
  11742. +dld_main. Either by changing the program or passing -Dmain=dld_main to the
  11743. +compiler. The reason for this is 1) the compiler apparently does something
  11744. +special for main functions (I encountered a reference to a __main function
  11745. +right after the start of main) and 2) dld_get_symbol("main") would return
  11746. +the address of the main function of the wrapper executable and not the one
  11747. +from your own program.
  11748. +
  11749. +While compiling wrap.c (the wrapper program) you can add a define
  11750. +-DADDLIBS="lib1;lib2;...".  This define is a semi-colon separated list of
  11751. +libraries that should be passed to dld for dynamic linking.  The default
  11752. +value is "/ade/lib/libgcc.a;/ade/lib/libc.a".
  11753. +
  11754. +Only one thing left to do: how to incorporate your own program into the
  11755. +wrapper program. One possibility was to just let wrap link your own program
  11756. +from a separate file (e.g. if your wrapper was called 'find' it would try
  11757. +to dynamically link a file 'find.o' or 'find.a' from the same place). But
  11758. +it much better and elegant to somehow add it into the wrapper so that there
  11759. +is only one file.
  11760. +
  11761. +I have decided to misuse the debughunk for that. The debughunk is never
  11762. +loaded into memory (which is what you want, as dld_link reads from file
  11763. +anyway) and when scanning through the hunks for the symbol definitions
  11764. +during the dld_init, the dld library can remember the offset and size of
  11765. +the debughunk on the fly. IF the debughunk starts with the magic cookie for
  11766. +a BSD object or archive, THEN it knows where to link in the object/archive.
  11767. +
  11768. +I wrote a small utility to put the object or archive into the debughunk of
  11769. +the wrapper executable. The source is ar2hunk.c.
  11770. +
  11771. +One small point remains: the dld linker needs the filename of the
  11772. +object/archive to link. It does not do to specify the name of the
  11773. +executable, as that is already used up by the dld_init. The filename was
  11774. +stored by dld so that it thinks that it already loaded that file. So I
  11775. +introduced a small hack into dld: if the filename passed to dld_link ends
  11776. +with ASCII code 1 (0x01 hex) it knows that it should read the debughunk
  11777. +from the file with the given filename but without the trailing 0x01 code.
  11778. +It's dirty, but for a first version it works very well.
  11779. +
  11780. +As a practical example, I ported the GNU find utility using this scheme.
  11781. +All stays the same, except for giving -Dmain=dld_main to GCC. The link step
  11782. +is a bit more complex: first compile the wrapper with the right setting for
  11783. +ADDLIBS. In this case, one would copy libfind.a to gnu:lib and specify:
  11784. +
  11785. +    gcc -O -o find wrap.c \
  11786. +    -DADDLIBS="/ade/lib/libfind.a;/ade/lib/libgcc.a;/ade/lib/libc.a".
  11787. +
  11788. +Next do:
  11789. +
  11790. +    ar q f.a *.o
  11791. +    ranlib f.a
  11792. +    ar2hunk find f.a
  11793. +
  11794. +
  11795. +And that does the trick. Except for the fact that the resulting find
  11796. +executable is actually bigger than it would have been without using this
  11797. +shared library mechanism, as all the symbol information takes up space too,
  11798. +and the dld library must be statically linked into the wrapper executable,
  11799. +with takes another 15-20 Kb.
  11800. +
  11801. +                Enjoy!
  11802. +
  11803. +                Hans Verkuil
  11804. +                July 8, 1995
  11805. +                hans@wyst.hobby.nl
  11806. diff -rup --new-file baseline/fsf/dld/showsyms.c amiga/fsf/dld/showsyms.c
  11807. --- baseline/fsf/dld/showsyms.c    Wed Dec 31 17:00:00 1969
  11808. +++ amiga/fsf/dld/showsyms.c    Sat Sep 28 00:00:00 1996
  11809. @@ -0,0 +1,154 @@
  11810. +#include <stdlib.h>
  11811. +#include <stdio.h>
  11812. +#include <string.h>
  11813. +#include <fcntl.h>
  11814. +#include <unistd.h>
  11815. +
  11816. +static unsigned long get_num(int fd)
  11817. +{
  11818. +  unsigned long t;
  11819. +  
  11820. +  read(fd, &t, 4);
  11821. +  return t;
  11822. +}
  11823. +
  11824. +static void skip(int fd, unsigned long t)
  11825. +{
  11826. +  lseek(fd, t * 4, SEEK_CUR);
  11827. +}
  11828. +
  11829. +static char *amiga_buf;
  11830. +static int amiga_bufsize, amiga_bufptr, amiga_desc, amiga_read;
  11831. +
  11832. +static void amiga_buf_init(int desc)
  11833. +{
  11834. +  amiga_desc = desc;
  11835. +  if (amiga_buf == NULL)
  11836. +  {
  11837. +    amiga_bufsize = 10240;
  11838. +    amiga_buf = (char *)malloc(amiga_bufsize);
  11839. +  }
  11840. +  amiga_read = read(amiga_desc, amiga_buf, amiga_bufsize);
  11841. +  amiga_bufptr = 0;
  11842. +}
  11843. +
  11844. +static unsigned long fget_num(void)
  11845. +{
  11846. +  if (amiga_bufptr == amiga_bufsize)
  11847. +  {
  11848. +    amiga_read = read(amiga_desc, amiga_buf, amiga_bufsize);
  11849. +    amiga_bufptr = 0;
  11850. +  }
  11851. +  amiga_bufptr += 4;
  11852. +  return *((long *)(amiga_buf + amiga_bufptr - 4));
  11853. +}
  11854. +
  11855. +static void fread_string(char *buf, int size)
  11856. +{
  11857. +  while (amiga_bufptr + size > amiga_bufsize)
  11858. +  {
  11859. +    int diff = amiga_bufsize - amiga_bufptr;
  11860. +
  11861. +    memcpy(buf, amiga_buf + amiga_bufptr, diff);
  11862. +    buf += diff;
  11863. +    size -= diff;
  11864. +    amiga_read = read(amiga_desc, amiga_buf, amiga_bufsize);
  11865. +    amiga_bufptr = 0;
  11866. +  }
  11867. +  memcpy(buf, amiga_buf + amiga_bufptr, size);
  11868. +  amiga_bufptr += size;
  11869. +}
  11870. +
  11871. +static void amiga_buf_term(void)
  11872. +{
  11873. +  lseek(amiga_desc, amiga_bufptr - amiga_read, SEEK_CUR);
  11874. +}
  11875. +
  11876. +static void
  11877. +amiga_read_file_symbols (desc)
  11878. +register int desc;
  11879. +{
  11880. +  int t, f, l;
  11881. +  int start, type, sdata, sbss;
  11882. +  int name_size = 500;
  11883. +  char *name;
  11884. +
  11885. +  if (get_num(desc) != 0x03f3)
  11886. +    exit(20);
  11887. +  name = (char *)malloc(name_size);
  11888. +  while (t = get_num(desc))
  11889. +    skip(desc, t);
  11890. +  get_num(desc);
  11891. +  f = get_num(desc);
  11892. +  l = get_num(desc);
  11893. +  skip(desc, l - f + 1);
  11894. +  while (l >= 0)
  11895. +  {
  11896. +    switch (t = get_num(desc))
  11897. +    {
  11898. +      case 0x03e9:      /* text */
  11899. +        skip(desc, (t = get_num(desc)));
  11900. +        break;
  11901. +      case 0x03ea:      /* data */
  11902. +        skip(desc, (sdata = get_num(desc)));
  11903. +        break;
  11904. +      case 0x03eb:      /* bss */
  11905. +        sbss = get_num(desc) * 4;
  11906. +        break;
  11907. +      case 0x03e8:      /* name  */
  11908. +      case 0x03e7:      /* unit  */
  11909. +      case 0x03f1:      /* debug */
  11910. +        skip(desc, get_num(desc));
  11911. +        break;
  11912. +      case 0x03ee:      /* reloc8  */
  11913. +      case 0x03ed:      /* reloc16 */
  11914. +      case 0x03ec:      /* reloc32 */
  11915. +        while (t = get_num(desc))
  11916. +          skip(desc, t + 1);
  11917. +        break;
  11918. +      case 0x03ef:      /* ext */
  11919. +        while (t = get_num(desc))
  11920. +          skip(desc, (t & 0xffffff) + 1);
  11921. +        break;
  11922. +      case 0x03f0:      /* symbols */
  11923. +        amiga_buf_init(desc);
  11924. +        while (t = fget_num())
  11925. +        {
  11926. +          while (t >= name_size)
  11927. +          {
  11928. +            char *buf = (char *)malloc(name_size * 2);
  11929. +            
  11930. +            free(name);
  11931. +            name = buf;
  11932. +            name_size *= 2;
  11933. +          }
  11934. +          fread_string(name, t * 4);
  11935. +          name[t * 4] = 0;
  11936. +          fget_num();
  11937. +          printf("%s\n", name);
  11938. +        }
  11939. +        amiga_buf_term();
  11940. +        break;
  11941. +      case 0x03f2:      /* end */
  11942. +        l--;
  11943. +        break;
  11944. +    }
  11945. +  }
  11946. +  free(name);
  11947. +  if (amiga_buf)
  11948. +    free(amiga_buf);
  11949. +  amiga_buf = NULL;
  11950. +}
  11951. +
  11952. +main(int argc, char **argv)
  11953. +{
  11954. +  int fd;
  11955. +
  11956. +  while (argv[1])
  11957. +  {
  11958. +    fd = open(argv[1], O_RDONLY);
  11959. +    amiga_read_file_symbols(fd);
  11960. +    close(fd);
  11961. +    argv++;
  11962. +  }
  11963. +}
  11964. diff -rup --new-file baseline/fsf/dld/test/Makefile amiga/fsf/dld/test/Makefile
  11965. --- baseline/fsf/dld/test/Makefile    Sun Mar 19 18:43:04 1995
  11966. +++ amiga/fsf/dld/test/Makefile    Sat Sep 28 00:00:00 1996
  11967. @@ -1,15 +1,16 @@
  11968. -EXECS = call_add1 dld-test overlay reload reload-test simple call_add2
  11969. +EXECS = call_add1 dld-test overlay simple #call_add2 reload reload-test 
  11970.  
  11971.  OBJS =  hello.o print_arg.o read-a.out.o list-undefined.o get-sym.o \
  11972.      need.o test-define.o print_global.o remove.o sub.o
  11973.  
  11974.  LIB = ../libdld.a
  11975. +LIBXX = ../libdld++.a
  11976.  INCLUDE = ../dld.h
  11977.  CC= gcc
  11978.  CXX= g++
  11979.  #    add -static to CFLAGS for Sparc Sun4.
  11980. -CFLAGS = -O6 -I..
  11981. -CXXFLAGS = -O6 -I..
  11982. +CFLAGS = -I..
  11983. +CXXFLAGS = -I..
  11984.  SPECIAL = -DLIBGCC=\"`gcc --print-lib`\"
  11985.  
  11986.  check:    all
  11987. @@ -18,11 +19,11 @@ all:    ${EXECS} ${LIB}
  11988.      -simple
  11989.      #                 "test call_add1"
  11990.      -call_add1
  11991. -    -call_add2
  11992. +    #-call_add2
  11993.      #                 "test overlay"
  11994.      -overlay
  11995.      #                 "test reload"
  11996. -    -reload reload-test
  11997. +    #-reload reload-test
  11998.      #                 "test general"
  11999.      -dld-test <SAMPLE_INPUT
  12000.      #                 "tests complete"
  12001. @@ -65,8 +66,8 @@ hello.o: hello.c
  12002.  dld-test: $(LIB) $(INCLUDE) ${OBJS} main.o
  12003.      ${CC} ${CFLAGS} main.o $(LIB) -o dld-test
  12004.  
  12005. -gxxtest: $(LIB) $(INCLUDE) ${OBJS} gxxtest.o
  12006. -    ${CXX} ${CXXFLAGS} gxxtest.o $(LIB) -o gxxtest
  12007. +gxxtest: $(LIBXX) $(INCLUDE) ${OBJS} gxxtest.o
  12008. +    ${CXX} ${CXXFLAGS} gxxtest.o $(LIBXX) -o gxxtest
  12009.  
  12010.  gxxtest.o: gxxtest.cc
  12011.      ${CXX} -c ${CXXFLAGS} ${SPECIAL} gxxtest.cc
  12012. diff -rup --new-file baseline/fsf/dld/test/gxxtest.cc amiga/fsf/dld/test/gxxtest.cc
  12013. --- baseline/fsf/dld/test/gxxtest.cc    Sat Mar 18 21:51:34 1995
  12014. +++ amiga/fsf/dld/test/gxxtest.cc    Sat Sep 28 00:00:00 1996
  12015. @@ -10,8 +10,9 @@ LIBGCC,            /* link in libgcc */
  12016.  0
  12017.  };
  12018.  
  12019. -main()
  12020. +main(int argc, char **argv)
  12021.  {
  12022. +        dld_init(argv[0]);
  12023.      cout<<"DLD function: "<<endl;
  12024.      dld_link("sub.o");
  12025.      dld_unlink_by_file("sub.o",0);
  12026. diff -rup --new-file baseline/fsf/dld/test/reload-test.s amiga/fsf/dld/test/reload-test.s
  12027. --- baseline/fsf/dld/test/reload-test.s    Mon Dec 13 04:02:22 1993
  12028. +++ amiga/fsf/dld/test/reload-test.s    Sat Sep 28 00:00:00 1996
  12029. @@ -1,32 +1,20 @@
  12030. -    .file    "reload-test.c"
  12031. -    .data
  12032. -.comm _387_flt, 4
  12033. -    .align    2
  12034. -    .globl    _k
  12035. -_k:
  12036. -    .long    1
  12037. -    .text
  12038. -    .align    2
  12039. -    .globl    _main
  12040. +#NO_APP
  12041. +gcc2_compiled.:
  12042. +___gnu_compiled_c:
  12043. +.text
  12044. +LC0:
  12045. +    .ascii "Hello world! -- from reload-test\12\0"
  12046. +    .even
  12047. +.globl _main
  12048.  _main:
  12049. -    jmp    .L15
  12050. -.L14:
  12051. -    pushl    $.L17
  12052. -    call    _printf
  12053. -    popl    %ecx
  12054. -/REGAL    0    NOFPA    NODBL
  12055. -.L13:
  12056. -    leave
  12057. -    ret
  12058. -.L15:
  12059. -    pushl    %ebp
  12060. -    movl    %esp,%ebp
  12061. -    jmp    .L14
  12062. -/DEF    _main;
  12063. -    .data
  12064. -.L17:
  12065. -
  12066. -    .byte    0x48,0x65,0x6c,0x6c,0x6f,0x20,0x77,0x6f,0x72,0x6c
  12067. -    .byte    0x64,0x21,0x20,0x2d,0x2d,0x20,0x66,0x72,0x6f,0x6d
  12068. -    .byte    0x20,0x72,0x65,0x6c,0x6f,0x61,0x64,0x2d,0x74,0x65
  12069. -    .byte    0x73,0x74,0x0a,0x00
  12070. +    link a5,#0
  12071. +    jbsr ___main
  12072. +    pea LC0
  12073. +    jbsr _printf
  12074. +    addqw #4,sp
  12075. +    moveq #0,d0
  12076. +    jra L1
  12077. +L1:
  12078. +    unlk a5
  12079. +    rts
  12080. +.comm _end,4
  12081. diff -rup --new-file baseline/fsf/dld/test/reload.c amiga/fsf/dld/test/reload.c
  12082. --- baseline/fsf/dld/test/reload.c    Mon Dec 13 04:02:22 1993
  12083. +++ amiga/fsf/dld/test/reload.c    Sat Sep 28 00:00:00 1996
  12084. @@ -19,7 +19,7 @@ char *argv[];
  12085.      /* unlink itself */
  12086.      printf("unlink returned %d\n", dld_unlink_by_file (argv[0], 1));
  12087.  
  12088. -    printf("link returnd %d\n",dld_link (argv[1]));
  12089. +    printf("link returned %d\n",dld_link (argv[1]));
  12090.  #if defined(sequent)
  12091.      func = (void (*)()) dld_get_func ("main");
  12092.      (*func) ();
  12093. diff -rup --new-file baseline/fsf/dld/wrap.c amiga/fsf/dld/wrap.c
  12094. --- baseline/fsf/dld/wrap.c    Wed Dec 31 17:00:00 1969
  12095. +++ amiga/fsf/dld/wrap.c    Sat Sep 28 00:00:00 1996
  12096. @@ -0,0 +1,75 @@
  12097. +#include <stdio.h>
  12098. +#include <dld.h>
  12099. +
  12100. +#ifndef ADDLIBS
  12101. +#define ADDLIBS "/ade/lib/libgcc.a;/ade/lib/libc.a"
  12102. +#endif
  12103. +
  12104. +static char *libs = ADDLIBS;
  12105. +
  12106. +main(int argc, char **argv, char **env)
  12107. +{
  12108. +  char *p = libs;
  12109. +  int done = 0;
  12110. +  void (*func)(int, char **, char **);
  12111. +  char *exe;
  12112. +  char hack[2];
  12113. +
  12114. +  hack[0] = 1;
  12115. +  hack[1] = 0;
  12116. +  exe = dld_find_executable(argv[0]);
  12117. +  dld_init(exe);
  12118. +  dld_create_reference("dld_main");
  12119. +  strcat(exe, hack);
  12120. +  if (dld_link(exe))
  12121. +  {
  12122. +    dld_perror("could not link in dld_main function");
  12123. +    exit(1);
  12124. +  }
  12125. +  while (!done)
  12126. +  {
  12127. +    while (*p && *p != ';')
  12128. +      p++;
  12129. +    if (*p == '\0')
  12130. +      done = 1;
  12131. +    *p++ = '\0';
  12132. +    if (dld_link(libs))
  12133. +    {
  12134. +      char buf[1000];
  12135. +
  12136. +      strcpy(buf, "could not link in ");
  12137. +      strcat(buf, libs);
  12138. +      dld_perror(buf);
  12139. +      exit(1);
  12140. +    }
  12141. +    libs = p;
  12142. +  }
  12143. +
  12144. +  func = (void (*)(int, char **, char **))dld_get_symbol("dld_main");
  12145. +  if (func)
  12146. +  {
  12147. +    if (dld_function_executable_p("dld_main"))
  12148. +    {
  12149. +      func(argc, argv, env);
  12150. +      exit(0);
  12151. +    }
  12152. +    else
  12153. +    {
  12154. +      char **symbols;
  12155. +      int i;
  12156. +
  12157. +      fprintf(stderr, "dld_main is not executable\n");
  12158. +      symbols = dld_list_undefined_sym();
  12159. +      if (dld_undefined_sym_count != 0)
  12160. +        fprintf(stderr, "undefined symbols:\n");
  12161. +      for (i = 0; i < dld_undefined_sym_count; i++) {
  12162. +        fprintf(stderr, "%s\n", symbols[i]);
  12163. +        free(symbols[i]);
  12164. +      }
  12165. +      free(symbols);
  12166. +    }
  12167. +  }
  12168. +  else
  12169. +    fprintf(stderr, "dld_main not found\n");
  12170. +  exit(1);
  12171. +}
  12172.