diff options
Diffstat (limited to 'newlib/libc/sys/linux/dl/dl-reloc.c')
-rw-r--r-- | newlib/libc/sys/linux/dl/dl-reloc.c | 211 |
1 files changed, 0 insertions, 211 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 0bffa4e76..000000000 --- a/newlib/libc/sys/linux/dl/dl-reloc.c +++ /dev/null @@ -1,211 +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. */ - - /* This macro is used as a callback from the ELF_DYNAMIC_RELOCATE code. */ -#define RESOLVE_MAP(ref, version, r_type, scope) \ - (ELFW(ST_BIND) ((*ref)->st_info) != STB_LOCAL \ - ? ((__builtin_expect ((*ref) == map->l_lookup_cache.sym, 0) \ - && elf_machine_type_class (r_type) == map->l_lookup_cache.type_class)\ - ? (++_dl_num_cache_relocations, \ - (*ref) = map->l_lookup_cache.ret, \ - map->l_lookup_cache.value) \ - : ({ lookup_t _lr; \ - int _tc = elf_machine_type_class (r_type); \ - map->l_lookup_cache.type_class = _tc; \ - map->l_lookup_cache.sym = (*ref); \ - _lr = ((version) != NULL && (version)->hash != 0 \ - ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, \ - map, (ref), scope, \ - (version), _tc, 0) \ - : _dl_lookup_symbol (strtab + (*ref)->st_name, map, (ref),\ - scope, _tc, 0)); \ - map->l_lookup_cache.ret = (*ref); \ - map->l_lookup_cache.value = _lr; })) \ - : map) -#define RESOLVE(ref, version, r_type, scope) \ - (ELFW(ST_BIND) ((*ref)->st_info) != STB_LOCAL \ - ? ((__builtin_expect ((*ref) == map->l_lookup_cache.sym, 0) \ - && elf_machine_type_class (r_type) == map->l_lookup_cache.type_class)\ - ? (++_dl_num_cache_relocations, \ - (*ref) = map->l_lookup_cache.ret, \ - map->l_lookup_cache.value) \ - : ({ lookup_t _lr; \ - int _tc = elf_machine_type_class (r_type); \ - map->l_lookup_cache.type_class = _tc; \ - map->l_lookup_cache.sym = (*ref); \ - _lr = ((version) != NULL && (version)->hash != 0 \ - ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, \ - map, (ref), scope, \ - (version), _tc, 0) \ - : _dl_lookup_symbol (strtab + (*ref)->st_name, map, (ref),\ - scope, _tc, 0)); \ - map->l_lookup_cache.ret = (*ref); \ - map->l_lookup_cache.value = _lr; })) \ - : map->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; - } -} - -#include <machine/dl-machine.h> - -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); -} |