toolchain/uClibc/patches/407-ldso-avr32-2.patch

   1 Subject: [PATCH] ldso: AVR32 support
   2
   3 This implements the AVR32-specific parts of the dynamic linker.
   4
   5 ---
   6
   7  ldso/ldso/avr32/dl-debug.h    |   45 +++++++++
   8  ldso/ldso/avr32/dl-startup.h  |  110 ++++++++++++++++++++++++
   9  ldso/ldso/avr32/dl-syscalls.h |    5 +
  10  ldso/ldso/avr32/dl-sysdep.h   |  103 ++++++++++++++++++++++
  11  ldso/ldso/avr32/elfinterp.c   |  191 ++++++++++++++++++++++++++++++++++++++++++
  12  ldso/ldso/avr32/resolve.S     |   28 ++++++
  13  6 files changed, 482 insertions(+)
  14
  15 Index: uClibc-0.9.28/ldso/ldso/avr32/dl-debug.h
  16 ===================================================================
  17 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  18 +++ uClibc-0.9.28/ldso/ldso/avr32/dl-debug.h    2006-05-05 09:30:43.000000000 +0200
  19 @@ -0,0 +1,45 @@
  20 +/*
  21 + * AVR32 ELF shared libary loader support
  22 + *
  23 + * Copyright (C) 2005 Atmel Norway
  24 + * All rights reserved.
  25 + *
  26 + * Redistribution and use in source and binary forms, with or without
  27 + * modification, are permitted provided that the following conditions
  28 + * are met:
  29 + * 1. Redistributions of source code must retain the above copyright
  30 + *    notice, this list of conditions and the following disclaimer.
  31 + * 2. The name of the above contributors may not be
  32 + *    used to endorse or promote products derived from this software
  33 + *    without specific prior written permission.
  34 + *
  35 + * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
  36 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  38 + * ARE DISCLAIMED.  IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
  39 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  40 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  41 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  42 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  43 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  44 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  45 + * SUCH DAMAGE.
  46 + */
  47 +
  48 +static const char *_dl_reltypes_tab[] = {
  49 +    "R_AVR32_NONE",
  50 +    "R_AVR32_32", "R_AVR32_16", "R_AVR32_8",
  51 +    "R_AVR32_32_PCREL", "R_AVR32_16_PCREL", "R_AVR32_8_PCREL",
  52 +    "R_AVR32_DIFF32", "R_AVR32_DIFF16", "R_AVR32_DIFF8",
  53 +    "R_AVR32_GOT32", "R_AVR32_GOT16", "R_AVR32_GOT8",
  54 +    "R_AVR32_21S", "R_AVR32_16U", "R_AVR32_16S", "R_AVR32_8S", "R_AVR32_8S_EXT",
  55 +    "R_AVR32_22H_PCREL", "R_AVR32_18W_PCREL", "R_AVR32_16B_PCREL",
  56 +    "R_AVR32_16N_PCREL", "R_AVR32_14UW_PCREL", "R_AVR32_11H_PCREL",
  57 +    "R_AVR32_10UW_PCREL", "R_AVR32_9H_PCREL", "R_AVR32_9UW_PCREL",
  58 +    "R_AVR32_HI16", "R_AVR32_LO16",
  59 +    "R_AVR32_GOTPC", "R_AVR32_GOTCALL", "R_AVR32_LDA_GOT",
  60 +    "R_AVR32_GOT21S", "R_AVR32_GOT18SW", "R_AVR32_GOT16S", "R_AVR32_GOT7UW",
  61 +    "R_AVR32_32_CPENT", "R_AVR32_CPCALL", "R_AVR32_16_CP", "R_AVR32_9W_CP",
  62 +    "R_AVR32_RELATIVE", "R_AVR32_GLOB_DAT", "R_AVR32_JMP_SLOT",
  63 +    "R_AVR32_ALIGN",
  64 +};
  65 Index: uClibc-0.9.28/ldso/ldso/avr32/dl-startup.h
  66 ===================================================================
  67 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  68 +++ uClibc-0.9.28/ldso/ldso/avr32/dl-startup.h  2006-05-05 09:29:45.000000000 +0200
  69 @@ -0,0 +1,110 @@
  70 +/* vi: set sw=4 ts=4: */
  71 +/*
  72 + * Architecture specific code used by dl-startup.c
  73 + * Copyright (C) 2005 Atmel Norway
  74 + */
  75 +
  76 +/* This is the library loader's main entry point. Let _dl_boot2 do its
  77 + * initializations and jump to the application's entry point
  78 + * afterwards. */
  79 +asm(   "       .text\n"
  80 +       "       .global _start\n"
  81 +       "       .type   _start,@function\n"
  82 +       "_start:\n"
  83 +       /* All arguments are on the stack initially */
  84 +       "       mov     r12, sp\n"
  85 +       "       rcall   _dl_start\n"
  86 +       /* Returns user entry point in r12. Save it. */
  87 +       "       mov     r0, r12\n"
  88 +       /* We're PIC, so get the Global Offset Table */
  89 +       "       lddpc   r6, .L_GOT\n"
  90 +       ".L_RGOT:\n"
  91 +       "       rsub    r6, pc\n"
  92 +       /* Adjust argc and argv according to _dl_skip_args */
  93 +       "       ld.w    r1, r6[_dl_skip_args@got]\n"
  94 +       "       ld.w    r1, r1[0]\n"
  95 +       "       ld.w    r2, sp++\n"
  96 +       "       sub     r2, r1\n"
  97 +       "       add     sp, sp, r1 << 2\n"
  98 +       "       st.w    --sp, r2\n"
  99 +       /* Load the finalizer function */
 100 +       "       ld.w    r12, r6[_dl_fini@got]\n"
 101 +       /* Jump to the user's entry point */
 102 +       "       mov     pc, r0\n\n"
 103 +
 104 +       "       .align  2\n"
 105 +       ".L_GOT:"
 106 +       "       .long   .L_RGOT - _GLOBAL_OFFSET_TABLE_\n"
 107 +       "       .size   _start, . - _start\n"
 108 +       "       .previous\n");
 109 +
 110 +/* Get a pointer to the argv array.  On many platforms this can be just
 111 + * the address if the first argument, on other platforms we need to
 112 + * do something a little more subtle here. */
 113 +#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long *)ARGS + 1)
 114 +
 115 +
 116 +/* We can't call functions before the GOT has been initialized */
 117 +#define NO_FUNCS_BEFORE_BOOTSTRAP
 118 +
 119 +/*
 120 + * Relocate the GOT during dynamic loader bootstrap.  This will add
 121 + * the load address to all entries in the GOT, which is necessary
 122 + * because the linker doesn't generate R_AVR32_RELATIVE relocs for the
 123 + * GOT.
 124 + */
 125 +static __always_inline
 126 +void PERFORM_BOOTSTRAP_GOT(struct elf_resolve *tpnt)
 127 +{
 128 +       Elf32_Addr i, nr_got;
 129 +       register Elf32_Addr *__r6 __asm__("r6");
 130 +       Elf32_Addr *got = __r6;
 131 +
 132 +       nr_got = tpnt->dynamic_info[DT_AVR32_GOTSZ_IDX] / sizeof(*got);
 133 +       for (i = 2; i < nr_got; i++)
 134 +               got[i] += tpnt->loadaddr;
 135 +}
 136 +
 137 +#define PERFORM_BOOTSTRAP_GOT(tpnt) PERFORM_BOOTSTRAP_GOT(tpnt)
 138 +
 139 +/* Handle relocation of the symbols in the dynamic loader. */
 140 +static __always_inline
 141 +void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr,
 142 +                            unsigned long symbol_addr,
 143 +                            unsigned long load_addr, Elf32_Sym *symtab)
 144 +{
 145 +       switch(ELF32_R_TYPE(rpnt->r_info)) {
 146 +       case R_AVR32_NONE:
 147 +               break;
 148 +       case R_AVR32_GLOB_DAT:
 149 +       case R_AVR32_JMP_SLOT:
 150 +               *reloc_addr = symbol_addr;
 151 +               break;
 152 +       case R_AVR32_RELATIVE:
 153 +               SEND_STDERR_DEBUG("Applying RELATIVE relocation: ");
 154 +               SEND_ADDRESS_STDERR_DEBUG(load_addr, 0);
 155 +               SEND_STDERR_DEBUG(" + ");
 156 +               SEND_ADDRESS_STDERR_DEBUG(rpnt->r_addend, 1);
 157 +               *reloc_addr = load_addr + rpnt->r_addend;
 158 +               break;
 159 +       default:
 160 +               SEND_STDERR("BOOTSTRAP_RELOC: unhandled reloc_type ");
 161 +               SEND_NUMBER_STDERR(ELF32_R_TYPE(rpnt->r_info), 1);
 162 +               SEND_STDERR("REL, SYMBOL, LOAD: ");
 163 +               SEND_ADDRESS_STDERR(reloc_addr, 0);
 164 +               SEND_STDERR(", ");
 165 +               SEND_ADDRESS_STDERR(symbol_addr, 0);
 166 +               SEND_STDERR(", ");
 167 +               SEND_ADDRESS_STDERR(load_addr, 1);
 168 +               _dl_exit(1);
 169 +       }
 170 +}
 171 +
 172 +/* Transfer control to the user's application, once the dynamic loader
 173 + * is done. This routine has to exit the current function, then call
 174 + * the _dl_elf_main function.
 175 + *
 176 + * Since our _dl_boot will simply call whatever is returned by
 177 + * _dl_boot2, we can just return the address we're supposed to
 178 + * call.  */
 179 +#define START()        return _dl_elf_main;
 180 Index: uClibc-0.9.28/ldso/ldso/avr32/dl-syscalls.h
 181 ===================================================================
 182 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 183 +++ uClibc-0.9.28/ldso/ldso/avr32/dl-syscalls.h 2006-05-05 09:29:25.000000000 +0200
 184 @@ -0,0 +1,5 @@
 185 +/* We can't use the real errno in ldso, since it has not yet
 186 + * been dynamicly linked in yet. */
 187 +extern int _dl_errno;
 188 +#define __set_errno(X) {(_dl_errno) = (X);}
 189 +#include "sys/syscall.h"
 190 Index: uClibc-0.9.28/ldso/ldso/avr32/dl-sysdep.h
 191 ===================================================================
 192 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 193 +++ uClibc-0.9.28/ldso/ldso/avr32/dl-sysdep.h   2006-05-05 09:30:43.000000000 +0200
 194 @@ -0,0 +1,103 @@
 195 +/* vi: set sw=4 ts=4: */
 196 +/*
 197 + * Various assembly language/system dependent hacks that are required
 198 + * so that we can minimize the amount of platform specific code.
 199 + * Copyright (C) 2004-2005 Atmel Norway
 200 + */
 201 +
 202 +/* Define this if the system uses RELOCA. */
 203 +#define ELF_USES_RELOCA
 204 +
 205 +#include <elf.h>
 206 +
 207 +#define ARCH_NUM 1
 208 +#define DT_AVR32_GOTSZ_IDX     (DT_NUM + OS_NUM)
 209 +
 210 +#define ARCH_DYNAMIC_INFO(dpnt, dynamic, debug_addr)                   \
 211 +       do {                                                            \
 212 +               if (dpnt->d_tag == DT_AVR32_GOTSZ)                      \
 213 +                       dynamic[DT_AVR32_GOTSZ_IDX] = dpnt->d_un.d_val; \
 214 +       } while (0)
 215 +
 216 +/* Initialization sequence for the application/library GOT. */
 217 +#define INIT_GOT(GOT_BASE,MODULE)                                      \
 218 +       do {                                                            \
 219 +               unsigned long i, nr_got;                                \
 220 +                                                                       \
 221 +               GOT_BASE[0] = (unsigned long) _dl_linux_resolve;        \
 222 +               GOT_BASE[1] = (unsigned long) MODULE;                   \
 223 +                                                                       \
 224 +               /* Add load address displacement to all GOT entries */  \
 225 +               nr_got = MODULE->dynamic_info[DT_AVR32_GOTSZ_IDX] / 4;  \
 226 +               for (i = 2; i < nr_got; i++)                            \
 227 +                       GOT_BASE[i] += (unsigned long)MODULE->loadaddr; \
 228 +       } while (0)
 229 +
 230 +#define do_rem(result, n, base)        ((result) = (n) % (base))
 231 +
 232 +/* Here we define the magic numbers that this dynamic loader should accept */
 233 +#define MAGIC1 EM_AVR32
 234 +#undef MAGIC2
 235 +
 236 +/* Used for error messages */
 237 +#define ELF_TARGET "AVR32"
 238 +
 239 +unsigned long _dl_linux_resolver(unsigned long got_offset, unsigned long *got);
 240 +
 241 +/* 4096 bytes alignment */
 242 +#define PAGE_ALIGN 0xfffff000
 243 +#define ADDR_ALIGN 0xfff
 244 +#define OFFS_ALIGN 0x7ffff000
 245 +
 246 +#define elf_machine_type_class(type)                           \
 247 +       ((type == R_AVR32_JMP_SLOT) * ELF_RTYPE_CLASS_PLT)
 248 +
 249 +/* AVR32 doesn't need any COPY relocs */
 250 +#define DL_NO_COPY_RELOCS
 251 +
 252 +/* Return the link-time address of _DYNAMIC.  Conveniently, this is the
 253 +   first element of the GOT.  This must be inlined in a function which
 254 +   uses global data.  */
 255 +static inline Elf32_Addr
 256 +elf_machine_dynamic (void)
 257 +{
 258 +       register Elf32_Addr *got asm ("r6");
 259 +       return *got;
 260 +}
 261 +
 262 +/* Return the run-time load address of the shared object.  */
 263 +static inline Elf32_Addr
 264 +elf_machine_load_address (void)
 265 +{
 266 +       extern void __dl_start asm("_dl_start");
 267 +       Elf32_Addr got_addr = (Elf32_Addr) &__dl_start;
 268 +       Elf32_Addr pcrel_addr;
 269 +
 270 +       asm   ("        lddpc   %0, 2f\n"
 271 +              "1:      add     %0, pc\n"
 272 +              "        rjmp    3f\n"
 273 +              "        .align  2\n"
 274 +              "2:      .long   _dl_start - 1b\n"
 275 +              "3:\n"
 276 +              : "=r"(pcrel_addr) : : "cc");
 277 +
 278 +       return pcrel_addr - got_addr;
 279 +}
 280 +
 281 +/*
 282 + * Perform any RELATIVE relocations specified by DT_RELCOUNT.
 283 + * Currently, we don't use that tag, but we might in the future as
 284 + * this would reduce the startup time somewhat (although probably not by much).
 285 + */
 286 +static inline void
 287 +elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr,
 288 +                     Elf32_Word relative_count)
 289 +{
 290 +       Elf32_Rela *rpnt = (void *)rel_addr;
 291 +
 292 +       do {
 293 +               Elf32_Addr *reloc_addr;
 294 +               reloc_addr = (void *)(load_off + (rpnt++)->r_offset);
 295 +               *reloc_addr = load_off + rpnt->r_addend;
 296 +       } while (--relative_count);
 297 +}
 298 Index: uClibc-0.9.28/ldso/ldso/avr32/elfinterp.c
 299 ===================================================================
 300 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 301 +++ uClibc-0.9.28/ldso/ldso/avr32/elfinterp.c   2006-05-05 09:30:43.000000000 +0200
 302 @@ -0,0 +1,191 @@
 303 +/*
 304 + * AVR32 ELF shared library loader suppport
 305 + *
 306 + * Copyright (C) 2004-2006 Atmel Corporation
 307 + *
 308 + * All rights reserved.
 309 + *
 310 + * Redistribution and use in source and binary forms, with or without
 311 + * modification, are permitted provided that the following conditions
 312 + * are met:
 313 + * 1. Redistributions of source code must retain the above copyright
 314 + *    notice, this list of conditions and the following disclaimer.
 315 + * 2. The name of the above contributors may not be
 316 + *    used to endorse or promote products derived from this software
 317 + *    without specific prior written permission.
 318 + *
 319 + * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
 320 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 321 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 322 + * ARE DISCLAIMED.  IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
 323 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 324 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 325 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 326 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 327 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 328 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 329 + * SUCH DAMAGE.
 330 + */
 331 +
 332 +unsigned long _dl_linux_resolver(unsigned long got_offset, unsigned long *got)
 333 +{
 334 +       struct elf_resolve *tpnt = (struct elf_resolve *)got[1];
 335 +       Elf32_Sym *sym;
 336 +       unsigned long local_gotno;
 337 +       unsigned long gotsym;
 338 +       unsigned long new_addr;
 339 +       char *strtab, *symname;
 340 +       unsigned long *entry;
 341 +       unsigned long sym_index = got_offset / 4;
 342 +
 343 +#if 0
 344 +       local_gotno = tpnt->dynamic_info[DT_AVR32_LOCAL_GOTNO];
 345 +       gotsym = tpnt->dynamic_info[DT_AVR32_GOTSYM];
 346 +
 347 +       sym = ((Elf32_Sym *)(tpnt->dynamic_info[DT_SYMTAB] + tpnt->loadaddr))
 348 +               + sym_index;
 349 +       strtab = (char *)(tpnt->dynamic_info[DT_STRTAB] + tpnt->loadaddr);
 350 +       symname = strtab + sym->st_name;
 351 +
 352 +#if 0
 353 +       new_addr = (unsigned long) _dl_find_hash(strtab + sym->st_name,
 354 +                                                tpnt->symbol_scope, tpnt,
 355 +                                                resolver);
 356 +#endif
 357 +
 358 +       entry = (unsigned long *)(got + local_gotno + sym_index - gotsym);
 359 +       *entry = new_addr;
 360 +#endif
 361 +
 362 +       return new_addr;
 363 +}
 364 +
 365 +static int
 366 +_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope,
 367 +         unsigned long rel_addr, unsigned long rel_size,
 368 +         int (*reloc_func)(struct elf_resolve *tpnt, struct dyn_elf *scope,
 369 +                           Elf32_Rela *rpnt, Elf32_Sym *symtab, char *strtab))
 370 +{
 371 +       Elf32_Sym *symtab;
 372 +       Elf32_Rela *rpnt;
 373 +       char *strtab;
 374 +       int i;
 375 +
 376 +       rpnt = (Elf32_Rela *)rel_addr;
 377 +       rel_size /= sizeof(Elf32_Rela);
 378 +       symtab = (Elf32_Sym *)tpnt->dynamic_info[DT_SYMTAB];
 379 +       strtab = (char *)tpnt->dynamic_info[DT_STRTAB];
 380 +
 381 +       for (i = 0; i < rel_size; i++, rpnt++) {
 382 +               int symtab_index, res;
 383 +
 384 +               symtab_index = ELF32_R_SYM(rpnt->r_info);
 385 +
 386 +               debug_sym(symtab, strtab, symtab_index);
 387 +               debug_reloc(symtab, strtab, rpnt);
 388 +
 389 +               res = reloc_func(tpnt, scope, rpnt, symtab, strtab);
 390 +
 391 +               if (res == 0)
 392 +                       continue;
 393 +
 394 +               _dl_dprintf(2, "\n%s: ", _dl_progname);
 395 +
 396 +               if (symtab_index)
 397 +                       _dl_dprintf(2, "symbol '%s': ",
 398 +                                   strtab + symtab[symtab_index].st_name);
 399 +
 400 +               if (res < 0) {
 401 +                       int reloc_type = ELF32_R_TYPE(rpnt->r_info);
 402 +#if defined(__SUPPORT_LD_DEBUG__)
 403 +                       _dl_dprintf(2, "can't handle reloc type %s\n",
 404 +                                   _dl_reltypes(reloc_type));
 405 +#else
 406 +                       _dl_dprintf(2, "can't handle reloc type %x\n",
 407 +                                   reloc_type);
 408 +#endif
 409 +                       _dl_exit(-res);
 410 +               } else {
 411 +                       _dl_dprintf(2, "can't resolve symbol\n");
 412 +                       return res;
 413 +               }
 414 +       }
 415 +
 416 +       return 0;
 417 +}
 418 +
 419 +static int _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope,
 420 +                       Elf32_Rela *rpnt, Elf32_Sym *symtab, char *strtab)
 421 +{
 422 +       int reloc_type;
 423 +       int symtab_index;
 424 +       char *symname;
 425 +       unsigned long *reloc_addr;
 426 +       unsigned long symbol_addr;
 427 +#if defined(__SUPPORT_LD_DEBUG__)
 428 +       unsigned long old_val;
 429 +#endif
 430 +
 431 +       reloc_addr = (unsigned long *)(tpnt->loadaddr + rpnt->r_offset);
 432 +       reloc_type = ELF32_R_TYPE(rpnt->r_info);
 433 +       symtab_index = ELF32_R_SYM(rpnt->r_info);
 434 +       symbol_addr = 0;
 435 +       symname = strtab + symtab[symtab_index].st_name;
 436 +
 437 +       if (symtab_index) {
 438 +               symbol_addr = (unsigned long)
 439 +                       _dl_find_hash(strtab + symtab[symtab_index].st_name,
 440 +                                     tpnt->symbol_scope, tpnt,
 441 +                                     elf_machine_type_class(reloc_type));
 442 +
 443 +               /* Allow undefined references to weak symbols */
 444 +               if (!symbol_addr &&
 445 +                   ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK) {
 446 +                       _dl_dprintf(2, "%s: can't resolve symbol '%s'\n",
 447 +                                   _dl_progname, symname);
 448 +                       return 0;
 449 +               }
 450 +       }
 451 +
 452 +#if defined(__SUPPORT_LD_DEBUG__)
 453 +       old_val = *reloc_addr;
 454 +#endif
 455 +       switch (reloc_type) {
 456 +       case R_AVR32_NONE:
 457 +               break;
 458 +       case R_AVR32_GLOB_DAT:
 459 +       case R_AVR32_JMP_SLOT:
 460 +               *reloc_addr = symbol_addr + rpnt->r_addend;
 461 +               break;
 462 +       case R_AVR32_RELATIVE:
 463 +               *reloc_addr = (unsigned long)tpnt->loadaddr
 464 +                       + rpnt->r_addend;
 465 +               break;
 466 +       default:
 467 +               return -1;
 468 +       }
 469 +
 470 +#if defined(__SUPPORT_LD_DEBUG__)
 471 +       if (_dl_debug_reloc && _dl_debug_detail)
 472 +               _dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x\n",
 473 +                           old_val, *reloc_addr);
 474 +#endif
 475 +
 476 +       return 0;
 477 +}
 478 +
 479 +void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt,
 480 +                                          unsigned long rel_addr,
 481 +                                          unsigned long rel_size)
 482 +{
 483 +       /* TODO: Might want to support this in order to get faster
 484 +        * startup times... */
 485 +}
 486 +
 487 +int _dl_parse_relocation_information(struct dyn_elf *rpnt,
 488 +                                    unsigned long rel_addr,
 489 +                                    unsigned long rel_size)
 490 +{
 491 +       return _dl_parse(rpnt->dyn, rpnt->dyn->symbol_scope, rel_addr, rel_size,
 492 +                        _dl_do_reloc);
 493 +}
 494 Index: uClibc-0.9.28/ldso/ldso/avr32/resolve.S
 495 ===================================================================
 496 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 497 +++ uClibc-0.9.28/ldso/ldso/avr32/resolve.S     2006-05-05 09:29:25.000000000 +0200
 498 @@ -0,0 +1,28 @@
 499 +/*
 500 + * Linux dynamic resolving code for AVR32. Fixes up the GOT entry as
 501 + * indicated in register r12 and jumps to the resolved address.
 502 + *
 503 + * This file is subject to the terms and conditions of the GNU Lesser General
 504 + * Public License.  See the file "COPYING.LIB" in the main directory of this
 505 + * archive for more details.
 506 + *
 507 + * Copyright (C) 2004 Atmel Norway
 508 + */
 509 +
 510 +#define ip r5
 511 +
 512 +       .text
 513 +       .global _dl_linux_resolve
 514 +       .type   _dl_linux_resolve,@function
 515 +_dl_linux_resolve:
 516 +       /* The PLT code pushed r8 for us. It contains the address of this
 517 +          function's GOT entry, that is entry 0. ip contains the address
 518 +          of the GOT entry of the function we wanted to call. */
 519 +       stm     --sp, r9-r12, lr
 520 +       mov     r11, r8
 521 +       sub     r12, ip, r8
 522 +       rcall   _dl_linux_resolver
 523 +       mov     ip, r12
 524 +       popm    r8-r12,lr
 525 +       mov     pc, ip
 526 +       .size   _dl_linux_resolve, . - _dl_linux_resolve