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glibc  2.9
Defines | Functions | Variables
dl-machine.c File Reference
#include <unistd.h>
#include <string.h>
#include <sys/param.h>
#include <link.h>
#include <ldsodefs.h>
#include <elf/dynamic-link.h>
#include <dl-machine.h>
#include <stdio-common/_itoa.h>

Go to the source code of this file.

Defines

#define PLT_INITIAL_ENTRY_WORDS   18
#define PLT_LONGBRANCH_ENTRY_WORDS   0
#define PLT_TRAMPOLINE_ENTRY_WORDS   6
#define PLT_DOUBLE_SIZE   (1<<13)
#define PLT_ENTRY_START_WORDS(entry_number)
#define PLT_DATA_START_WORDS(num_entries)   PLT_ENTRY_START_WORDS(num_entries)
#define OPCODE_ADDI(rd, ra, simm)   (0x38000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))
#define OPCODE_ADDIS(rd, ra, simm)   (0x3c000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))
#define OPCODE_ADD(rd, ra, rb)   (0x7c000214 | (rd) << 21 | (ra) << 16 | (rb) << 11)
#define OPCODE_B(target)   (0x48000000 | ((target) & 0x03fffffc))
#define OPCODE_BA(target)   (0x48000002 | ((target) & 0x03fffffc))
#define OPCODE_BCTR()   0x4e800420
#define OPCODE_LWZ(rd, d, ra)   (0x80000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))
#define OPCODE_LWZU(rd, d, ra)   (0x84000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))
#define OPCODE_MTCTR(rd)   (0x7C0903A6 | (rd) << 21)
#define OPCODE_RLWINM(ra, rs, sh, mb, me)   (0x54000000 | (rs) << 21 | (ra) << 16 | (sh) << 11 | (mb) << 6 | (me) << 1)
#define OPCODE_LI(rd, simm)   OPCODE_ADDI(rd,0,simm)
#define OPCODE_ADDIS_HI(rd, ra, value)   OPCODE_ADDIS(rd,ra,((value) + 0x8000) >> 16)
#define OPCODE_LIS_HI(rd, value)   OPCODE_ADDIS_HI(rd,0,value)
#define OPCODE_SLWI(ra, rs, sh)   OPCODE_RLWINM(ra,rs,sh,0,31-sh)
#define PPC_DCBST(where)   asm volatile ("dcbst 0,%0" : : "r"(where) : "memory")
#define PPC_SYNC   asm volatile ("sync" : : : "memory")
#define PPC_ISYNC   asm volatile ("sync; isync" : : : "memory")
#define PPC_ICBI(where)   asm volatile ("icbi 0,%0" : : "r"(where) : "memory")
#define PPC_DIE   asm volatile ("tweq 0,0")
#define MODIFIED_CODE_NOQUEUE(where)   do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); } while (0)
#define MODIFIED_CODE(where)   do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); PPC_ISYNC; } while (0)
#define DO_TLS_RELOC(suffix)

Functions

 ElfW (Addr)
int __elf_machine_runtime_setup (struct link_map *map, int lazy, int profile)
Elf32_Addr __elf_machine_fixup_plt (struct link_map *map, const Elf32_Rela *reloc, Elf32_Addr *reloc_addr, Elf32_Addr finaladdr)
void _dl_reloc_overflow (struct link_map *map, const char *name, Elf32_Addr *const reloc_addr, const Elf32_Sym *refsym)
void __process_machine_rela (struct link_map *map, const Elf32_Rela *reloc, struct link_map *sym_map, const Elf32_Sym *sym, const Elf32_Sym *refsym, Elf32_Addr *const reloc_addr, Elf32_Addr const finaladdr, int rinfo)

Variables

int __cache_line_size attribute_hidden

Define Documentation

#define DO_TLS_RELOC (   suffix)
Value:
case R_PPC_DTPREL##suffix:                                           \
      /* During relocation all TLS symbols are defined and used.            \
        Therefore the offset is already correct.  */                        \
      if (sym_map != NULL)                                           \
       do_reloc##suffix ("R_PPC_DTPREL"#suffix,                      \
                       TLS_DTPREL_VALUE (sym, reloc));               \
      break;                                                         \
    case R_PPC_TPREL##suffix:                                               \
      if (sym_map != NULL)                                           \
       {                                                             \
         CHECK_STATIC_TLS (map, sym_map);                            \
         do_reloc##suffix ("R_PPC_TPREL"#suffix,                     \
                         TLS_TPREL_VALUE (sym_map, sym, reloc));            \
       }                                                             \
      break;
#define MODIFIED_CODE (   where)    do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); PPC_ISYNC; } while (0)

Definition at line 89 of file dl-machine.c.

#define MODIFIED_CODE_NOQUEUE (   where)    do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); } while (0)

Definition at line 86 of file dl-machine.c.

#define OPCODE_ADD (   rd,
  ra,
  rb 
)    (0x7c000214 | (rd) << 21 | (ra) << 16 | (rb) << 11)

Definition at line 58 of file dl-machine.c.

#define OPCODE_ADDI (   rd,
  ra,
  simm 
)    (0x38000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))

Definition at line 54 of file dl-machine.c.

#define OPCODE_ADDIS (   rd,
  ra,
  simm 
)    (0x3c000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))

Definition at line 56 of file dl-machine.c.

#define OPCODE_ADDIS_HI (   rd,
  ra,
  value 
)    OPCODE_ADDIS(rd,ra,((value) + 0x8000) >> 16)

Definition at line 72 of file dl-machine.c.

#define OPCODE_B (   target)    (0x48000000 | ((target) & 0x03fffffc))

Definition at line 60 of file dl-machine.c.

#define OPCODE_BA (   target)    (0x48000002 | ((target) & 0x03fffffc))

Definition at line 61 of file dl-machine.c.

#define OPCODE_BCTR ( )    0x4e800420

Definition at line 62 of file dl-machine.c.

#define OPCODE_LI (   rd,
  simm 
)    OPCODE_ADDI(rd,0,simm)

Definition at line 71 of file dl-machine.c.

#define OPCODE_LIS_HI (   rd,
  value 
)    OPCODE_ADDIS_HI(rd,0,value)

Definition at line 74 of file dl-machine.c.

#define OPCODE_LWZ (   rd,
  d,
  ra 
)    (0x80000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))

Definition at line 63 of file dl-machine.c.

#define OPCODE_LWZU (   rd,
  d,
  ra 
)    (0x84000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))

Definition at line 65 of file dl-machine.c.

#define OPCODE_MTCTR (   rd)    (0x7C0903A6 | (rd) << 21)

Definition at line 67 of file dl-machine.c.

#define OPCODE_RLWINM (   ra,
  rs,
  sh,
  mb,
  me 
)    (0x54000000 | (rs) << 21 | (ra) << 16 | (sh) << 11 | (mb) << 6 | (me) << 1)

Definition at line 68 of file dl-machine.c.

#define OPCODE_SLWI (   ra,
  rs,
  sh 
)    OPCODE_RLWINM(ra,rs,sh,0,31-sh)

Definition at line 75 of file dl-machine.c.

#define PLT_DATA_START_WORDS (   num_entries)    PLT_ENTRY_START_WORDS(num_entries)

Definition at line 51 of file dl-machine.c.

#define PLT_DOUBLE_SIZE   (1<<13)

Definition at line 45 of file dl-machine.c.

#define PLT_ENTRY_START_WORDS (   entry_number)
Value:
(PLT_INITIAL_ENTRY_WORDS + (entry_number)*2                           \
   + ((entry_number) > PLT_DOUBLE_SIZE                                \
      ? ((entry_number) - PLT_DOUBLE_SIZE)*2                          \
      : 0))

Definition at line 46 of file dl-machine.c.

#define PLT_INITIAL_ENTRY_WORDS   18

Definition at line 42 of file dl-machine.c.

Definition at line 43 of file dl-machine.c.

Definition at line 44 of file dl-machine.c.

#define PPC_DCBST (   where)    asm volatile ("dcbst 0,%0" : : "r"(where) : "memory")

Definition at line 78 of file dl-machine.c.

#define PPC_DIE   asm volatile ("tweq 0,0")

Definition at line 82 of file dl-machine.c.

#define PPC_ICBI (   where)    asm volatile ("icbi 0,%0" : : "r"(where) : "memory")

Definition at line 81 of file dl-machine.c.

#define PPC_ISYNC   asm volatile ("sync; isync" : : : "memory")

Definition at line 80 of file dl-machine.c.

#define PPC_SYNC   asm volatile ("sync" : : : "memory")

Definition at line 79 of file dl-machine.c.


Function Documentation

Elf32_Addr __elf_machine_fixup_plt ( struct link_map map,
const Elf32_Rela reloc,
Elf32_Addr reloc_addr,
Elf32_Addr  finaladdr 
)

Definition at line 340 of file dl-machine.c.

{
  Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
  if (delta << 6 >> 6 == delta)
    *reloc_addr = OPCODE_B (delta);
  else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000)
    *reloc_addr = OPCODE_BA (finaladdr);
  else
    {
      Elf32_Word *plt, *data_words;
      Elf32_Word index, offset, num_plt_entries;

      num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
                      / sizeof(Elf32_Rela));
      plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
      offset = reloc_addr - plt;
      index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
      data_words = plt + PLT_DATA_START_WORDS (num_plt_entries);

      reloc_addr += 1;

      if (index < PLT_DOUBLE_SIZE)
       {
         data_words[index] = finaladdr;
         PPC_SYNC;
         *reloc_addr = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1))
                              * 4);
       }
      else
       {
         index -= (index - PLT_DOUBLE_SIZE)/2;

         data_words[index] = finaladdr;
         PPC_SYNC;

         reloc_addr[1] = OPCODE_MTCTR (12);
         MODIFIED_CODE_NOQUEUE (reloc_addr + 1);
         PPC_SYNC;

         reloc_addr[0] = OPCODE_LWZ (12,
                                  (Elf32_Word) (data_words + index), 11);
       }
    }
  MODIFIED_CODE (reloc_addr);
  return finaladdr;
}

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int __elf_machine_runtime_setup ( struct link_map map,
int  lazy,
int  profile 
)

Definition at line 212 of file dl-machine.c.

{
  if (map->l_info[DT_JMPREL])
    {
      Elf32_Word i;
      Elf32_Word *plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
      Elf32_Word num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
                                / sizeof (Elf32_Rela));
      Elf32_Word rel_offset_words = PLT_DATA_START_WORDS (num_plt_entries);
      Elf32_Word data_words = (Elf32_Word) (plt + rel_offset_words);
      Elf32_Word size_modified;

      extern void _dl_runtime_resolve (void);
      extern void _dl_prof_resolve (void);

      /* Convert the index in r11 into an actual address, and get the
        word at that address.  */
      plt[PLT_LONGBRANCH_ENTRY_WORDS] = OPCODE_ADDIS_HI (11, 11, data_words);
      plt[PLT_LONGBRANCH_ENTRY_WORDS + 1] = OPCODE_LWZ (11, data_words, 11);

      /* Call the procedure at that address.  */
      plt[PLT_LONGBRANCH_ENTRY_WORDS + 2] = OPCODE_MTCTR (11);
      plt[PLT_LONGBRANCH_ENTRY_WORDS + 3] = OPCODE_BCTR ();

      if (lazy)
       {
         Elf32_Word *tramp = plt + PLT_TRAMPOLINE_ENTRY_WORDS;
         Elf32_Word dlrr = (Elf32_Word)(profile
                                    ? _dl_prof_resolve
                                    : _dl_runtime_resolve);
         Elf32_Word offset;

         if (profile && GLRO(dl_profile) != NULL
             && _dl_name_match_p (GLRO(dl_profile), map))
           /* This is the object we are looking for.  Say that we really
              want profiling and the timers are started.  */
           GL(dl_profile_map) = map;

         /* For the long entries, subtract off data_words.  */
         tramp[0] = OPCODE_ADDIS_HI (11, 11, -data_words);
         tramp[1] = OPCODE_ADDI (11, 11, -data_words);

         /* Multiply index of entry by 3 (in r11).  */
         tramp[2] = OPCODE_SLWI (12, 11, 1);
         tramp[3] = OPCODE_ADD (11, 12, 11);
         if (dlrr <= 0x01fffffc || dlrr >= 0xfe000000)
           {
             /* Load address of link map in r12.  */
             tramp[4] = OPCODE_LI (12, (Elf32_Word) map);
             tramp[5] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map);

             /* Call _dl_runtime_resolve.  */
             tramp[6] = OPCODE_BA (dlrr);
           }
         else
           {
             /* Get address of _dl_runtime_resolve in CTR.  */
             tramp[4] = OPCODE_LI (12, dlrr);
             tramp[5] = OPCODE_ADDIS_HI (12, 12, dlrr);
             tramp[6] = OPCODE_MTCTR (12);

             /* Load address of link map in r12.  */
             tramp[7] = OPCODE_LI (12, (Elf32_Word) map);
             tramp[8] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map);

             /* Call _dl_runtime_resolve.  */
             tramp[9] = OPCODE_BCTR ();
           }

         /* Set up the lazy PLT entries.  */
         offset = PLT_INITIAL_ENTRY_WORDS;
         i = 0;
         while (i < num_plt_entries && i < PLT_DOUBLE_SIZE)
           {
             plt[offset  ] = OPCODE_LI (11, i * 4);
             plt[offset+1] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS + 2
                                    - (offset+1))
                                   * 4);
             i++;
             offset += 2;
           }
         while (i < num_plt_entries)
           {
             plt[offset  ] = OPCODE_LIS_HI (11, i * 4 + data_words);
             plt[offset+1] = OPCODE_LWZU (12, i * 4 + data_words, 11);
             plt[offset+2] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS
                                    - (offset+2))
                                   * 4);
             plt[offset+3] = OPCODE_BCTR ();
             i++;
             offset += 4;
           }
       }

      /* Now, we've modified code.  We need to write the changes from
        the data cache to a second-level unified cache, then make
        sure that stale data in the instruction cache is removed.
        (In a multiprocessor system, the effect is more complex.)
        Most of the PLT shouldn't be in the instruction cache, but
        there may be a little overlap at the start and the end.

        Assumes that dcbst and icbi apply to lines of 16 bytes or
        more.  Current known line sizes are 16, 32, and 128 bytes.
        The following gets the __cache_line_size, when available.  */

      /* Default minimum 4 words per cache line.  */
      int line_size_words = 4;

      if (lazy && __cache_line_size != 0)
       /* Convert bytes to words.  */
       line_size_words = __cache_line_size / 4;

      size_modified = lazy ? rel_offset_words : 6;
      for (i = 0; i < size_modified; i += line_size_words)
        PPC_DCBST (plt + i);
      PPC_DCBST (plt + size_modified - 1);
      PPC_SYNC;

      for (i = 0; i < size_modified; i += line_size_words)
        PPC_ICBI (plt + i);
      PPC_ICBI (plt + size_modified - 1);
      PPC_ISYNC;
    }

  return lazy;
}

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void __process_machine_rela ( struct link_map map,
const Elf32_Rela reloc,
struct link_map sym_map,
const Elf32_Sym sym,
const Elf32_Sym refsym,
Elf32_Addr *const  reloc_addr,
Elf32_Addr const  finaladdr,
int  rinfo 
)

Definition at line 413 of file dl-machine.c.

{
  switch (rinfo)
    {
    case R_PPC_NONE:
      return;

    case R_PPC_ADDR32:
    case R_PPC_GLOB_DAT:
    case R_PPC_RELATIVE:
      *reloc_addr = finaladdr;
      return;

    case R_PPC_UADDR32:
      ((char *) reloc_addr)[0] = finaladdr >> 24;
      ((char *) reloc_addr)[1] = finaladdr >> 16;
      ((char *) reloc_addr)[2] = finaladdr >> 8;
      ((char *) reloc_addr)[3] = finaladdr;
      break;

    case R_PPC_ADDR24:
      if (__builtin_expect (finaladdr > 0x01fffffc && finaladdr < 0xfe000000, 0))
       _dl_reloc_overflow (map,  "R_PPC_ADDR24", reloc_addr, refsym);
      *reloc_addr = (*reloc_addr & 0xfc000003) | (finaladdr & 0x3fffffc);
      break;

    case R_PPC_ADDR16:
      if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
       _dl_reloc_overflow (map,  "R_PPC_ADDR16", reloc_addr, refsym);
      *(Elf32_Half*) reloc_addr = finaladdr;
      break;

    case R_PPC_UADDR16:
      if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
       _dl_reloc_overflow (map,  "R_PPC_UADDR16", reloc_addr, refsym);
      ((char *) reloc_addr)[0] = finaladdr >> 8;
      ((char *) reloc_addr)[1] = finaladdr;
      break;

    case R_PPC_ADDR16_LO:
      *(Elf32_Half*) reloc_addr = finaladdr;
      break;

    case R_PPC_ADDR16_HI:
      *(Elf32_Half*) reloc_addr = finaladdr >> 16;
      break;

    case R_PPC_ADDR16_HA:
      *(Elf32_Half*) reloc_addr = (finaladdr + 0x8000) >> 16;
      break;

    case R_PPC_ADDR14:
    case R_PPC_ADDR14_BRTAKEN:
    case R_PPC_ADDR14_BRNTAKEN:
      if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
       _dl_reloc_overflow (map,  "R_PPC_ADDR14", reloc_addr, refsym);
      *reloc_addr = (*reloc_addr & 0xffff0003) | (finaladdr & 0xfffc);
      if (rinfo != R_PPC_ADDR14)
       *reloc_addr = ((*reloc_addr & 0xffdfffff)
                     | ((rinfo == R_PPC_ADDR14_BRTAKEN)
                       ^ (finaladdr >> 31)) << 21);
      break;

    case R_PPC_REL24:
      {
       Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
       if (delta << 6 >> 6 != delta)
         _dl_reloc_overflow (map,  "R_PPC_REL24", reloc_addr, refsym);
       *reloc_addr = (*reloc_addr & 0xfc000003) | (delta & 0x3fffffc);
      }
      break;

    case R_PPC_COPY:
      if (sym == NULL)
       /* This can happen in trace mode when an object could not be
          found.  */
       return;
      if (sym->st_size > refsym->st_size
         || (GLRO(dl_verbose) && sym->st_size < refsym->st_size))
       {
         const char *strtab;

         strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
         _dl_error_printf ("\
%s: Symbol `%s' has different size in shared object, consider re-linking\n",
                         rtld_progname ?: "<program name unknown>",
                         strtab + refsym->st_name);
       }
      memcpy (reloc_addr, (char *) finaladdr, MIN (sym->st_size,
                                             refsym->st_size));
      return;

    case R_PPC_REL32:
      *reloc_addr = finaladdr - (Elf32_Word) reloc_addr;
      return;

    case R_PPC_JMP_SLOT:
      /* It used to be that elf_machine_fixup_plt was used here,
        but that doesn't work when ld.so relocates itself
        for the second time.  On the bright side, there's
         no need to worry about thread-safety here.  */
      {
       Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
       if (delta << 6 >> 6 == delta)
         *reloc_addr = OPCODE_B (delta);
       else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000)
         *reloc_addr = OPCODE_BA (finaladdr);
       else
         {
           Elf32_Word *plt, *data_words;
           Elf32_Word index, offset, num_plt_entries;

           plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
           offset = reloc_addr - plt;

           if (offset < PLT_DOUBLE_SIZE*2 + PLT_INITIAL_ENTRY_WORDS)
             {
              index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
              num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
                               / sizeof(Elf32_Rela));
              data_words = plt + PLT_DATA_START_WORDS (num_plt_entries);
              data_words[index] = finaladdr;
              reloc_addr[0] = OPCODE_LI (11, index * 4);
              reloc_addr[1] = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS
                                      - (offset+1))
                                     * 4);
              MODIFIED_CODE_NOQUEUE (reloc_addr + 1);
             }
           else
             {
              reloc_addr[0] = OPCODE_LIS_HI (12, finaladdr);
              reloc_addr[1] = OPCODE_ADDI (12, 12, finaladdr);
              reloc_addr[2] = OPCODE_MTCTR (12);
              reloc_addr[3] = OPCODE_BCTR ();
              MODIFIED_CODE_NOQUEUE (reloc_addr + 3);
             }
         }
      }
      break;

#define DO_TLS_RELOC(suffix)                                                \
    case R_PPC_DTPREL##suffix:                                              \
      /* During relocation all TLS symbols are defined and used.            \
        Therefore the offset is already correct.  */                        \
      if (sym_map != NULL)                                           \
       do_reloc##suffix ("R_PPC_DTPREL"#suffix,                      \
                       TLS_DTPREL_VALUE (sym, reloc));               \
      break;                                                         \
    case R_PPC_TPREL##suffix:                                               \
      if (sym_map != NULL)                                           \
       {                                                             \
         CHECK_STATIC_TLS (map, sym_map);                            \
         do_reloc##suffix ("R_PPC_TPREL"#suffix,                     \
                         TLS_TPREL_VALUE (sym_map, sym, reloc));            \
       }                                                             \
      break;

    inline void do_reloc16 (const char *r_name, Elf32_Addr value)
      {
       if (__builtin_expect (value > 0x7fff && value < 0xffff8000, 0))
         _dl_reloc_overflow (map, r_name, reloc_addr, refsym);
       *(Elf32_Half *) reloc_addr = value;
      }
    inline void do_reloc16_LO (const char *r_name, Elf32_Addr value)
      {
       *(Elf32_Half *) reloc_addr = value;
      }
    inline void do_reloc16_HI (const char *r_name, Elf32_Addr value)
      {
       *(Elf32_Half *) reloc_addr = value >> 16;
      }
    inline void do_reloc16_HA (const char *r_name, Elf32_Addr value)
      {
       *(Elf32_Half *) reloc_addr = (value + 0x8000) >> 16;
      }
    DO_TLS_RELOC (16)
    DO_TLS_RELOC (16_LO)
    DO_TLS_RELOC (16_HI)
    DO_TLS_RELOC (16_HA)

    default:
      _dl_reloc_bad_type (map, rinfo, 0);
      return;
    }

  MODIFIED_CODE_NOQUEUE (reloc_addr);

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void _dl_reloc_overflow ( struct link_map map,
const char *  name,
Elf32_Addr *const  reloc_addr,
const Elf32_Sym refsym 
)

Definition at line 389 of file dl-machine.c.

{
  char buffer[128];
  char *t;
  t = stpcpy (buffer, name);
  t = stpcpy (t, " relocation at 0x00000000");
  _itoa_word ((unsigned) reloc_addr, t, 16, 0);
  if (refsym)
    {
      const char *strtab;

      strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
      t = stpcpy (t, " for symbol `");
      t = stpcpy (t, strtab + refsym->st_name);
      t = stpcpy (t, "'");
    }
  t = stpcpy (t, " out of range");
  _dl_signal_error (0, map->l_name, NULL, buffer);
}

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ElfW ( Addr  )

Definition at line 102 of file dl-machine.c.

{
  ElfW(Addr) low, high;
  struct link_map *l;
  Lmid_t nsid;

  /* If the object has a preference, load it there!  */
  if (mapstartpref != 0)
    return mapstartpref;

  /* Otherwise, quickly look for a suitable gap between 0x3FFFF and
     0x70000000.  0x3FFFF is so that references off NULL pointers will
     cause a segfault, 0x70000000 is just paranoia (it should always
     be superceded by the program's load address).  */
  low =  0x0003FFFF;
  high = 0x70000000;
  for (nsid = 0; nsid < DL_NNS; ++nsid)
    for (l = GL(dl_ns)[nsid]._ns_loaded; l; l = l->l_next)
      {
       ElfW(Addr) mapstart, mapend;
       mapstart = l->l_map_start & ~(GLRO(dl_pagesize) - 1);
       mapend = l->l_map_end | (GLRO(dl_pagesize) - 1);
       assert (mapend > mapstart);

       /* Prefer gaps below the main executable, note that l ==
          _dl_loaded does not work for static binaries loading
          e.g. libnss_*.so.  */
       if ((mapend >= high || l->l_type == lt_executable)
           && high >= mapstart)
         high = mapstart;
       else if (mapend >= low && low >= mapstart)
         low = mapend;
       else if (high >= mapend && mapstart >= low)
         {
           if (high - mapend >= mapstart - low)
             low = mapend;
           else
             high = mapstart;
         }
      }

  high -= 0x10000; /* Allow some room between objects.  */
  maplength = (maplength | (GLRO(dl_pagesize) - 1)) + 1;
  if (high <= low || high - low < maplength )
    return 0;
  return high - maplength;  /* Both high and maplength are page-aligned.  */
}

Variable Documentation

int __cache_line_size attribute_hidden

Definition at line 25 of file init-first.c.