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Diffstat (limited to 'newlib/libc/sys/linux/dl/dl-reloc.c')
-rw-r--r--newlib/libc/sys/linux/dl/dl-reloc.c213
1 files changed, 0 insertions, 213 deletions
diff --git a/newlib/libc/sys/linux/dl/dl-reloc.c b/newlib/libc/sys/linux/dl/dl-reloc.c
deleted file mode 100644
index 94163143e..000000000
--- a/newlib/libc/sys/linux/dl/dl-reloc.c
+++ /dev/null
@@ -1,213 +0,0 @@
-/* Relocate a shared object and resolve its references to other loaded objects.
- Copyright (C) 1995,96,97,98,99,2000,2001 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <errno.h>
-#include <libintl.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <ldsodefs.h>
-#include <sys/mman.h>
-#include <sys/param.h>
-#include <sys/types.h>
-#include "dynamic-link.h"
-
-/* Statistics function. */
-unsigned long int _dl_num_cache_relocations;
-
-
-void
-_dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
- int lazy, int consider_profiling)
-{
- struct textrels
- {
- caddr_t start;
- size_t len;
- int prot;
- struct textrels *next;
- } *textrels = NULL;
- /* Initialize it to make the compiler happy. */
- const char *errstring = NULL;
-
- if (l->l_relocated)
- return;
-
- /* If DT_BIND_NOW is set relocate all references in this object. We
- do not do this if we are profiling, of course. */
- if (!consider_profiling
- && __builtin_expect (l->l_info[DT_BIND_NOW] != NULL, 0))
- lazy = 0;
-
- if (__builtin_expect (_dl_debug_mask & DL_DEBUG_RELOC, 0))
- _dl_printf ("\nrelocation processing: %s%s\n",
- l->l_name[0] ? l->l_name : _dl_argv[0], lazy ? " (lazy)" : "");
-
- /* DT_TEXTREL is now in level 2 and might phase out at some time.
- But we rewrite the DT_FLAGS entry to a DT_TEXTREL entry to make
- testing easier and therefore it will be available at all time. */
- if (__builtin_expect (l->l_info[DT_TEXTREL] != NULL, 0))
- {
- /* Bletch. We must make read-only segments writable
- long enough to relocate them. */
- const ElfW(Phdr) *ph;
- for (ph = l->l_phdr; ph < &l->l_phdr[l->l_phnum]; ++ph)
- if (ph->p_type == PT_LOAD && (ph->p_flags & PF_W) == 0)
- {
- struct textrels *newp;
-
- newp = (struct textrels *) alloca (sizeof (*newp));
- newp->len = (((ph->p_vaddr + ph->p_memsz + _dl_pagesize - 1)
- & ~(_dl_pagesize - 1))
- - (ph->p_vaddr & ~(_dl_pagesize - 1)));
- newp->start = ((ph->p_vaddr & ~(_dl_pagesize - 1))
- + (caddr_t) l->l_addr);
-
- if (mprotect (newp->start, newp->len, PROT_READ|PROT_WRITE) < 0)
- {
- errstring = N_("cannot make segment writable for relocation");
- call_error:
- _dl_signal_error (errno, l->l_name, NULL, errstring);
- }
-
-#if (PF_R | PF_W | PF_X) == 7 && (PROT_READ | PROT_WRITE | PROT_EXEC) == 7
- newp->prot = (PF_TO_PROT
- >> ((ph->p_flags & (PF_R | PF_W | PF_X)) * 4)) & 0xf;
-#else
- newp->prot = 0;
- if (ph->p_flags & PF_R)
- newp->prot |= PROT_READ;
- if (ph->p_flags & PF_W)
- newp->prot |= PROT_WRITE;
- if (ph->p_flags & PF_X)
- newp->prot |= PROT_EXEC;
-#endif
- newp->next = textrels;
- textrels = newp;
- }
- }
-
- {
- /* Do the actual relocation of the object's GOT and other data. */
-
- /* String table object symbols. */
- const char *strtab = (const void *) D_PTR (l, l_info[DT_STRTAB]);
-
- /* This macro is used as a callback from the ELF_DYNAMIC_RELOCATE code. */
-#define RESOLVE_MAP(ref, version, r_type) \
- (ELFW(ST_BIND) ((*ref)->st_info) != STB_LOCAL \
- ? ((__builtin_expect ((*ref) == l->l_lookup_cache.sym, 0) \
- && elf_machine_type_class (r_type) == l->l_lookup_cache.type_class) \
- ? (++_dl_num_cache_relocations, \
- (*ref) = l->l_lookup_cache.ret, \
- l->l_lookup_cache.value) \
- : ({ lookup_t _lr; \
- int _tc = elf_machine_type_class (r_type); \
- l->l_lookup_cache.type_class = _tc; \
- l->l_lookup_cache.sym = (*ref); \
- _lr = ((version) != NULL && (version)->hash != 0 \
- ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, \
- l, (ref), scope, \
- (version), _tc, 0) \
- : _dl_lookup_symbol (strtab + (*ref)->st_name, l, (ref), \
- scope, _tc, 0)); \
- l->l_lookup_cache.ret = (*ref); \
- l->l_lookup_cache.value = _lr; })) \
- : l)
-#define RESOLVE(ref, version, r_type) \
- (ELFW(ST_BIND) ((*ref)->st_info) != STB_LOCAL \
- ? ((__builtin_expect ((*ref) == l->l_lookup_cache.sym, 0) \
- && elf_machine_type_class (r_type) == l->l_lookup_cache.type_class) \
- ? (++_dl_num_cache_relocations, \
- (*ref) = l->l_lookup_cache.ret, \
- l->l_lookup_cache.value) \
- : ({ lookup_t _lr; \
- int _tc = elf_machine_type_class (r_type); \
- l->l_lookup_cache.type_class = _tc; \
- l->l_lookup_cache.sym = (*ref); \
- _lr = ((version) != NULL && (version)->hash != 0 \
- ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, \
- l, (ref), scope, \
- (version), _tc, 0) \
- : _dl_lookup_symbol (strtab + (*ref)->st_name, l, (ref), \
- scope, _tc, 0)); \
- l->l_lookup_cache.ret = (*ref); \
- l->l_lookup_cache.value = _lr; })) \
- : l->l_addr)
-
-#include "dynamic-link.h"
-
- ELF_DYNAMIC_RELOCATE (l, lazy, consider_profiling);
-
- if (__builtin_expect (consider_profiling, 0))
- {
- /* Allocate the array which will contain the already found
- relocations. If the shared object lacks a PLT (for example
- if it only contains lead function) the l_info[DT_PLTRELSZ]
- will be NULL. */
- if (l->l_info[DT_PLTRELSZ] == NULL)
- {
- errstring = N_("%s: profiler found no PLTREL in object %s\n");
- fatal:
- _dl_fatal_printf (errstring,
- _dl_argv[0] ?: "<program name unknown>",
- l->l_name);
- }
-
- l->l_reloc_result =
- (ElfW(Addr) *) calloc (sizeof (ElfW(Addr)),
- l->l_info[DT_PLTRELSZ]->d_un.d_val);
- if (l->l_reloc_result == NULL)
- {
- errstring = N_("\
-%s: profiler out of memory shadowing PLTREL of %s\n");
- goto fatal;
- }
- }
- }
-
- /* Mark the object so we know this work has been done. */
- l->l_relocated = 1;
-
- /* Undo the segment protection changes. */
- while (__builtin_expect (textrels != NULL, 0))
- {
- if (mprotect (textrels->start, textrels->len, textrels->prot) < 0)
- {
- errstring = N_("cannot restore segment prot after reloc");
- goto call_error;
- }
-
- textrels = textrels->next;
- }
-}
-
-
-void
-internal_function
-_dl_reloc_bad_type (struct link_map *map, unsigned int type, int plt)
-{
- /* XXX We cannot translate these messages. */
- static const char msg[2][32] = { "unexpected reloc type",
- "unexpected PLT reloc type" };
- char msgbuf[sizeof (msg[0])];
-
- strcpy (msgbuf, msg[plt]);
-
- _dl_signal_error (0, map->l_name, NULL, msgbuf);
-}
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