cheri: elf: make l_entry a capability

Previously the entry address was fixed up to be a capability before
using it so l_entry could be ElfW(Addr), but the code is simpler and
more consistent if l_entry is a capability throughout:

The AT_ENTRY auxv entry is specified to be a capability and a number
if internal l_entry usage is simpler if it is elfptr_t.

diff --git a/elf/rtld.c b/elf/rtld.c
index f419dcc95ca2454887dd5b95b7d667337c860948..3a1f32ea7cba7e57dafec00cc8a9af23503472e1 100644 (file)
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -384,7 +384,7 @@ extern struct rtld_global_ro _rtld_local_ro
 
 
 static void dl_main (const ElfW(Phdr) *phdr, ElfW(Word) phnum,
-                    ElfW(Addr) *user_entry, ElfW(auxv_t) *auxv);
+                    elfptr_t *user_entry, ElfW(auxv_t) *auxv);
 
 /* These two variables cannot be moved into .data.rel.ro.  */
 static struct libname_list _dl_rtld_libname;
@@ -453,7 +453,7 @@ static elfptr_t __attribute__ ((noinline))
 _dl_start_final (void *arg, struct dl_start_final_info *info)
 #endif
 {
-  ElfW(Addr) start_addr;
+  elfptr_t start_addr;
 
   /* Do not use an initializer for these members because it would
      intefere with __rtld_static_init.  */
@@ -1357,7 +1357,7 @@ _dl_start_args_adjust (int skip_args)
 static void
 dl_main (const ElfW(Phdr) *phdr,
         ElfW(Word) phnum,
-        ElfW(Addr) *user_entry,
+        elfptr_t *user_entry,
         ElfW(auxv_t) *auxv)
 {
   struct link_map *main_map;

diff --git a/include/link.h b/include/link.h
index e70d3b2d7589efe8f5e0773a098c93b182117ed6..6dd8e712c4b0e75e9b1af28571fe3cf602551ef2 100644 (file)
--- a/include/link.h
+++ b/include/link.h
@@ -134,7 +134,7 @@ struct link_map
     ElfW(Dyn) *l_info[DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM
                      + DT_EXTRANUM + DT_VALNUM + DT_ADDRNUM];
     const ElfW(Phdr) *l_phdr;  /* Pointer to program header table in core.  */
-    ElfW(Addr) l_entry;                /* Entry point location.  */
+    elfptr_t l_entry;          /* Entry point location.  */
     ElfW(Half) l_phnum;                /* Number of program header entries.  */
     ElfW(Half) l_ldnum;                /* Number of dynamic segment entries.  */
 

diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 050a3032de8b0ed2879474dba3536fc9ea3be90f..d3fdf9f4e0560cdeae23f000c0823619cb252044 100644 (file)
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -1131,10 +1131,10 @@ extern void *_dl_sysdep_read_whole_file (const char *file, size_t *sizep,
    After this, file access calls and getenv must work.  This is responsible
    for setting __libc_enable_secure if we need to be secure (e.g. setuid),
    and for setting _dl_argc and _dl_argv, and then calling _dl_main.  */
-extern ElfW(Addr) _dl_sysdep_start (void **start_argptr,
+extern elfptr_t _dl_sysdep_start (void **start_argptr,
                                    void (*dl_main) (const ElfW(Phdr) *phdr,
                                                     ElfW(Word) phnum,
-                                                    ElfW(Addr) *user_entry,
+                                                    elfptr_t *user_entry,
                                                     ElfW(auxv_t) *auxv))
      attribute_hidden;
 

diff --git a/sysdeps/unix/sysv/linux/dl-sysdep.c b/sysdeps/unix/sysv/linux/dl-sysdep.c
index 9e15c5bf690b2757063e03eda5260f178d7391aa..b77d7fbb0e4a754a1674eda66a41d7d8e1a5f8b5 100644 (file)
--- a/sysdeps/unix/sysv/linux/dl-sysdep.c
+++ b/sysdeps/unix/sysv/linux/dl-sysdep.c
@@ -67,7 +67,7 @@ struct dl_main_arguments
 {
   const ElfW(Phdr) *phdr;
   ElfW(Word) phnum;
-  ElfW(Addr) user_entry;
+  elfptr_t user_entry;
 };
 
 /* Separate function, so that dl_main can be called without the large
@@ -95,10 +95,10 @@ _dl_sysdep_parse_arguments (void **start_argptr,
   args->user_entry = auxv_values[AT_ENTRY];
 }
 
-ElfW(Addr)
+elfptr_t
 _dl_sysdep_start (void **start_argptr,
                  void (*dl_main) (const ElfW(Phdr) *phdr, ElfW(Word) phnum,
-                                  ElfW(Addr) *user_entry, ElfW(auxv_t) *auxv))
+                                  elfptr_t *user_entry, ElfW(auxv_t) *auxv))
 {
   __libc_stack_end = DL_STACK_END (start_argptr);