cheri: elf: use RX, RW capabilities to derive pointers

Instead of

  map->l_addr + offset

use

  dl_rx_ptr (map, offset)
  dl_rw_ptr (map, offset)

depending on RX or RW permission requirement.

diff --git a/elf/dl-find_object.h b/elf/dl-find_object.h
index 3b49877e0e8448a24c20b54dcbf8a5ac14a6d190..a4df9a7d67e1d7e40ece5c780a54eeb0b4c0e337 100644 (file)
--- a/elf/dl-find_object.h
+++ b/elf/dl-find_object.h
@@ -105,7 +105,7 @@ _dl_find_object_from_map (struct link_map *l,
     if (ph->p_type == DLFO_EH_SEGMENT_TYPE)
       {
         atomic_store_relaxed (&result->eh_frame,
-                              (void *) (ph->p_vaddr + l->l_addr));
+                              (void *) dl_rx_ptr (l, ph->p_vaddr));
 #if DLFO_STRUCT_HAS_EH_COUNT
         atomic_store_relaxed (&result->eh_count, ph->p_memsz / 8);
 #endif

diff --git a/elf/dl-load.c b/elf/dl-load.c
index 1ad0868dad809d56c7ecced65ce482af4982abc9..7d7421462690092d57e4dadbfa4dc9e4b413fa5f 100644 (file)
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -866,7 +866,7 @@ _dl_init_paths (const char *llp, const char *source,
 void
 _dl_process_pt_gnu_property (struct link_map *l, int fd, const ElfW(Phdr) *ph)
 {
-  const ElfW(Nhdr) *note = (const void *) (ph->p_vaddr + l->l_addr);
+  const ElfW(Nhdr) *note = (const void *) dl_rx_ptr (l, ph->p_vaddr);
   const ElfW(Addr) size = ph->p_memsz;
   const ElfW(Addr) align = ph->p_align;
 
@@ -1314,7 +1314,7 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd,
     }
   else
     /* Adjust the PT_PHDR value by the runtime load address.  */
-    l->l_phdr = (ElfW(Phdr) *) ((ElfW(Addr)) l->l_phdr + l->l_addr);
+    l->l_phdr = (ElfW(Phdr) *) dl_rx_ptr (l, (ElfW(Addr)) l->l_phdr);
 
   if (__glibc_unlikely ((stack_flags &~ GL(dl_stack_flags)) & PF_X))
     {
@@ -1369,7 +1369,8 @@ cannot enable executable stack as shared object requires");
 
   /* Adjust the address of the TLS initialization image.  */
   if (l->l_tls_initimage != NULL)
-    l->l_tls_initimage = (char *) l->l_tls_initimage + l->l_addr;
+    l->l_tls_initimage
+      = (void *) dl_rw_ptr (l, (ElfW(Addr)) l->l_tls_initimage);
 
   /* Process program headers again after load segments are mapped in
      case processing requires accessing those segments.  Scan program
@@ -1402,7 +1403,7 @@ cannot enable executable stack as shared object requires");
   /* If this is ET_EXEC, we should have loaded it as lt_executable.  */
   assert (type != ET_EXEC || l->l_type == lt_executable);
 
-  l->l_entry += l->l_addr;
+  l->l_entry = dl_rx_ptr (l, l->l_entry);
 
   if (__glibc_unlikely (GLRO(dl_debug_mask) & DL_DEBUG_FILES))
     _dl_debug_printf ("\

diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c
index e7c99cbc82f0797d50ef749d91c891adfdb33778..5f6aef3e62e17e71ff16b50ab689d079f4d6b241 100644 (file)
--- a/elf/dl-runtime.c
+++ b/elf/dl-runtime.c
@@ -55,7 +55,7 @@ _dl_fixup (
                      + reloc_offset (pltgot, reloc_arg));
   const ElfW(Sym) *sym = &symtab[ELFW(R_SYM) (reloc->r_info)];
   const ElfW(Sym) *refsym = sym;
-  void *const rel_addr = (void *)(l->l_addr + reloc->r_offset);
+  void *const rel_addr = (void *) dl_rw_ptr (l, reloc->r_offset);
   lookup_t result;
   DL_FIXUP_VALUE_TYPE value;
 

diff --git a/elf/dl-version.c b/elf/dl-version.c
index cda08892098e2ade19a85f8d96775baa7cc7ffad..f19c8d1b42bc512552612dda3bc2bdbfe8498c50 100644 (file)
--- a/elf/dl-version.c
+++ b/elf/dl-version.c
@@ -86,7 +86,7 @@ checking for version `%s' in file %s [%lu] required by file %s [%lu]\n",
   def_offset = map->l_info[VERSYMIDX (DT_VERDEF)]->d_un.d_ptr;
   assert (def_offset != 0);
 
-  def = (ElfW(Verdef) *) ((char *) map->l_addr + def_offset);
+  def = (ElfW(Verdef) *) dl_rx_ptr (map, def_offset);
   while (1)
     {
       /* Currently the version number of the definition entry is 1.
@@ -177,7 +177,7 @@ _dl_check_map_versions (struct link_map *map, int verbose, int trace_mode)
   if (dyn != NULL)
     {
       /* This file requires special versions from its dependencies.  */
-      ElfW(Verneed) *ent = (ElfW(Verneed) *) (map->l_addr + dyn->d_un.d_ptr);
+      ElfW(Verneed) *ent = (ElfW(Verneed) *) dl_rx_ptr (map, dyn->d_un.d_ptr);
 
       /* Currently the version number of the needed entry is 1.
         Make sure all we see is this version.  */
@@ -257,7 +257,7 @@ _dl_check_map_versions (struct link_map *map, int verbose, int trace_mode)
   if (def != NULL)
     {
       ElfW(Verdef) *ent;
-      ent = (ElfW(Verdef) *) (map->l_addr + def->d_un.d_ptr);
+      ent = (ElfW(Verdef) *) dl_rx_ptr (map, def->d_un.d_ptr);
       while (1)
        {
          if ((unsigned int) (ent->vd_ndx & 0x7fff) > ndx_high)
@@ -296,7 +296,7 @@ _dl_check_map_versions (struct link_map *map, int verbose, int trace_mode)
       if (dyn != NULL)
        {
          ElfW(Verneed) *ent;
-         ent = (ElfW(Verneed) *) (map->l_addr + dyn->d_un.d_ptr);
+         ent = (ElfW(Verneed) *) dl_rx_ptr (map, dyn->d_un.d_ptr);
          while (1)
            {
              ElfW(Vernaux) *aux;
@@ -334,7 +334,7 @@ _dl_check_map_versions (struct link_map *map, int verbose, int trace_mode)
       if (def != NULL)
        {
          ElfW(Verdef) *ent;
-         ent = (ElfW(Verdef)  *) (map->l_addr + def->d_un.d_ptr);
+         ent = (ElfW(Verdef)  *) dl_rx_ptr (map, def->d_un.d_ptr);
          while (1)
            {
              ElfW(Verdaux) *aux;

diff --git a/elf/do-rel.h b/elf/do-rel.h
index 27b9b9f4275340239bad545289ba4c09312e40ac..694b3a6bd711f77a055860952c611749011d3372 100644 (file)
--- a/elf/do-rel.h
+++ b/elf/do-rel.h
@@ -62,7 +62,7 @@ elf_dynamic_do_Rel (struct link_map *map, struct r_scope_elem *scope[],
     {
       ElfW (Half) ndx = version[ELFW (R_SYM) (r->r_info)] & 0x7fff;
       const ElfW (Sym) *sym = &symtab[ELFW (R_SYM) (r->r_info)];
-      void *const r_addr_arg = (void *) (l_addr + r->r_offset);
+      void *const r_addr_arg = (void *) dl_rw_ptr (map, r->r_offset);
       const struct r_found_version *rversion = &map->l_versions[ndx];
 
       elf_machine_rel (map, scope, r, sym, rversion, r_addr_arg, skip_ifunc);
@@ -132,7 +132,7 @@ elf_dynamic_do_Rel (struct link_map *map, struct r_scope_elem *scope[],
            {
              ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)] & 0x7fff;
              const ElfW(Sym) *sym = &symtab[ELFW(R_SYM) (r->r_info)];
-             void *const r_addr_arg = (void *) (l_addr + r->r_offset);
+             void *const r_addr_arg = (void *) dl_rw_ptr (map, r->r_offset);
              const struct r_found_version *rversion = &map->l_versions[ndx];
 #if defined ELF_MACHINE_IRELATIVE
              if (ELFW(R_TYPE) (r->r_info) == ELF_MACHINE_IRELATIVE)
@@ -169,7 +169,7 @@ elf_dynamic_do_Rel (struct link_map *map, struct r_scope_elem *scope[],
                  elf_machine_rel (map, scope, r2,
                                   &symtab[ELFW(R_SYM) (r2->r_info)],
                                   &map->l_versions[ndx],
-                                  (void *) (l_addr + r2->r_offset),
+                                  (void *) dl_rw_ptr (map, r2->r_offset),
                                   skip_ifunc);
                }
 #endif
@@ -179,7 +179,7 @@ elf_dynamic_do_Rel (struct link_map *map, struct r_scope_elem *scope[],
          for (; r < end; ++r)
            {
              const ElfW(Sym) *sym = &symtab[ELFW(R_SYM) (r->r_info)];
-             void *const r_addr_arg = (void *) (l_addr + r->r_offset);
+             void *const r_addr_arg = (void *) dl_rw_ptr (map, r->r_offset);
 # ifdef ELF_MACHINE_IRELATIVE
              if (ELFW(R_TYPE) (r->r_info) == ELF_MACHINE_IRELATIVE)
                {
@@ -210,7 +210,7 @@ elf_dynamic_do_Rel (struct link_map *map, struct r_scope_elem *scope[],
            for (; r2 <= end2; ++r2)
              if (ELFW(R_TYPE) (r2->r_info) == ELF_MACHINE_IRELATIVE)
                elf_machine_rel (map, scope, r2, &symtab[ELFW(R_SYM) (r2->r_info)],
-                                NULL, (void *) (l_addr + r2->r_offset),
+                                NULL, (void *) dl_rw_ptr (map, r2->r_offset),
                                 skip_ifunc);
 # endif
        }

diff --git a/elf/rtld.c b/elf/rtld.c
index 26af99305ec263d8c630e5c627d0b48d43bde039..1dac96c94b552b4aee81b3821862bea753408395 100644 (file)
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -722,8 +722,7 @@ match_version (const char *string, struct link_map *map)
     /* The file has no symbol versioning.  */
     return 0;
 
-  def = (ElfW(Verdef) *) ((char *) map->l_addr
-                         + map->l_info[VERDEFTAG]->d_un.d_ptr);
+  def = (ElfW(Verdef) *) dl_rx_ptr (map, map->l_info[VERDEFTAG]->d_un.d_ptr);
   while (1)
     {
       ElfW(Verdaux) *aux = (ElfW(Verdaux) *) ((char *) def + def->vd_aux);
@@ -1186,8 +1185,8 @@ rtld_setup_main_map (struct link_map *main_map)
           dlopen call or DT_NEEDED entry, for something that wants to link
           against the dynamic linker as a shared library, will know that
           the shared object is already loaded.  */
-       _dl_rtld_libname.name = ((const char *) main_map->l_addr
-                                + ph->p_vaddr);
+       _dl_rtld_libname.name = (const char *) dl_rx_ptr (main_map,
+                                                         ph->p_vaddr);
        /* _dl_rtld_libname.next = NULL;        Already zero.  */
        GL(dl_rtld_map).l_libname = &_dl_rtld_libname;
 
@@ -1304,7 +1303,7 @@ rtld_setup_main_map (struct link_map *main_map)
      the executable is actually an ET_DYN object.  */
   if (main_map->l_tls_initimage != NULL)
     main_map->l_tls_initimage
-      = (char *) main_map->l_tls_initimage + main_map->l_addr;
+      = (void *) dl_rx_ptr (main_map, (ElfW(Addr)) main_map->l_tls_initimage);
   if (! main_map->l_map_end)
     main_map->l_map_end = ~0;
   if (! main_map->l_text_end)
@@ -2251,7 +2250,7 @@ dl_main (const ElfW(Phdr) *phdr,
                    continue;
 
                  strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
-                 ent = (ElfW(Verneed) *) (map->l_addr + dyn->d_un.d_ptr);
+                 ent = (ElfW(Verneed) *) dl_rx_ptr (map, dyn->d_un.d_ptr);
 
                  if (first)
                    {

diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 4c407e4f24452674b7aad7c9a64c28dafc3a1ba8..563b440aabc956949fec8117eba1fb27c28413b4 100644 (file)
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -115,7 +115,8 @@ dl_rw_ptr (const struct link_map *l, ElfW(Addr) vaddr)
   most architectures the entry is already relocated - but for some not
   and we need to relocate at access time.  */
 #define D_PTR(map, i) \
-  ((map)->i->d_un.d_ptr + (dl_relocate_ld (map) ? 0 : (map)->l_addr))
+  (dl_relocate_ld (map) ? (map)->i->d_un.d_ptr \
+                       : dl_rx_ptr ((map), (map)->i->d_un.d_ptr))
 
 /* Result of the lookup functions and how to retrieve the base address.  */
 typedef struct link_map *lookup_t;