diff options
Diffstat (limited to 'elf/dl-reloc.c')
| -rw-r--r-- | elf/dl-reloc.c | 60 |
1 files changed, 26 insertions, 34 deletions
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c index 1f66fccee2..61252d7697 100644 --- a/elf/dl-reloc.c +++ b/elf/dl-reloc.c @@ -1,5 +1,5 @@ /* Relocate a shared object and resolve its references to other loaded objects. - Copyright (C) 1995-2014 Free Software Foundation, Inc. + Copyright (C) 1995-2015 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 @@ -26,6 +26,7 @@ #include <sys/types.h> #include <_itoa.h> #include "dynamic-link.h" +#include <libc-internal.h> /* Statistics function. */ #ifdef SHARED @@ -74,9 +75,9 @@ _dl_try_allocate_static_tls (struct link_map *map) map->l_tls_offset = GL(dl_tls_static_used) = offset; #elif TLS_DTV_AT_TP /* dl_tls_static_used includes the TCB at the beginning. */ - size_t offset = (((GL(dl_tls_static_used) - - map->l_tls_firstbyte_offset - + map->l_tls_align - 1) & -map->l_tls_align) + size_t offset = (ALIGN_UP(GL(dl_tls_static_used) + - map->l_tls_firstbyte_offset, + map->l_tls_align) + map->l_tls_firstbyte_offset); size_t used = offset + map->l_tls_blocksize; @@ -136,12 +137,6 @@ _dl_nothread_init_static_tls (struct link_map *map) # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" #endif - /* Fill in the DTV slot so that a later LD/GD access will find it. */ - dtv_t *dtv = THREAD_DTV (); - assert (map->l_tls_modid <= dtv[-1].counter); - dtv[map->l_tls_modid].pointer.val = dest; - dtv[map->l_tls_modid].pointer.is_static = true; - /* Initialize the memory. */ memset (__mempcpy (dest, map->l_tls_initimage, map->l_tls_initimage_size), '\0', map->l_tls_blocksize - map->l_tls_initimage_size); @@ -183,14 +178,14 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[], && __builtin_expect (l->l_info[DT_BIND_NOW] != NULL, 0)) lazy = 0; - if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_RELOC, 0)) + if (__glibc_unlikely (GLRO(dl_debug_mask) & DL_DEBUG_RELOC)) _dl_debug_printf ("\nrelocation processing: %s%s\n", DSO_FILENAME (l->l_name), 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)) + if (__glibc_unlikely (l->l_info[DT_TEXTREL] != NULL)) { /* Bletch. We must make read-only segments writable long enough to relocate them. */ @@ -201,11 +196,10 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[], struct textrels *newp; newp = (struct textrels *) alloca (sizeof (*newp)); - newp->len = (((ph->p_vaddr + ph->p_memsz + GLRO(dl_pagesize) - 1) - & ~(GLRO(dl_pagesize) - 1)) - - (ph->p_vaddr & ~(GLRO(dl_pagesize) - 1))); - newp->start = ((ph->p_vaddr & ~(GLRO(dl_pagesize) - 1)) - + (caddr_t) l->l_addr); + newp->len = ALIGN_UP (ph->p_vaddr + ph->p_memsz, GLRO(dl_pagesize)) + - ALIGN_DOWN (ph->p_vaddr, GLRO(dl_pagesize)); + newp->start = PTR_ALIGN_DOWN (ph->p_vaddr, GLRO(dl_pagesize)) + + (caddr_t) l->l_addr; if (__mprotect (newp->start, newp->len, PROT_READ|PROT_WRITE) < 0) { @@ -264,28 +258,24 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[], ELF_DYNAMIC_RELOCATE (l, lazy, consider_profiling, skip_ifunc); #ifndef PROF - if (__builtin_expect (consider_profiling, 0)) + if (__glibc_unlikely (consider_profiling) + && l->l_info[DT_PLTRELSZ] != NULL) { /* 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: no PLTREL found in object %s\n"); - fatal: - _dl_fatal_printf (errstring, - RTLD_PROGNAME, - l->l_name); - } + size_t sizeofrel = l->l_info[DT_PLTREL]->d_un.d_val == DT_RELA + ? sizeof (ElfW(Rela)) + : sizeof (ElfW(Rel)); + size_t relcount = l->l_info[DT_PLTRELSZ]->d_un.d_val / sizeofrel; + l->l_reloc_result = calloc (sizeof (l->l_reloc_result[0]), relcount); - l->l_reloc_result = calloc (sizeof (l->l_reloc_result[0]), - l->l_info[DT_PLTRELSZ]->d_un.d_val); if (l->l_reloc_result == NULL) { errstring = N_("\ %s: out of memory to store relocation results for %s\n"); - goto fatal; + _dl_fatal_printf (errstring, RTLD_PROGNAME, l->l_name); } } #endif @@ -320,11 +310,13 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[], void internal_function _dl_protect_relro (struct link_map *l) { - ElfW(Addr) start = ((l->l_addr + l->l_relro_addr) - & ~(GLRO(dl_pagesize) - 1)); - ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size) - & ~(GLRO(dl_pagesize) - 1)); - + ElfW(Addr) start = ALIGN_DOWN((l->l_addr + + l->l_relro_addr), + GLRO(dl_pagesize)); + ElfW(Addr) end = ALIGN_DOWN((l->l_addr + + l->l_relro_addr + + l->l_relro_size), + GLRO(dl_pagesize)); if (start != end && __mprotect ((void *) start, end - start, PROT_READ) < 0) { |