[glibc/google/grte/v5-2.27/master] Fix arm build by only using _itoa when building ld-linux, and not 'sln'. Also disable __google_dlope

[glibc/google/grte/v5-2.27/master] Fix arm build by only using _itoa when building ld-linux, and not 'sln'. Also disable __google_dlope

[Fangrui Song]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cf93513721608bab943c2dc964617ec7ec5dab75

commit cf93513721608bab943c2dc964617ec7ec5dab75
Author: Paul Pluzhnikov <ppluzhnikov@google.com>
Date:   Sun Nov 23 18:12:56 2014 -0800

    Fix arm build by only using _itoa when building ld-linux, and not 'sln'. Also disable __google_dlopen_with_offset in fully-static link

Diff:
---
 dlfcn/dlopen.c | 19 +------------------
 elf/dl-load.c  |  4 ++++
 2 files changed, 5 insertions(+), 18 deletions(-)

diff --git a/dlfcn/dlopen.c b/dlfcn/dlopen.c
index 319ae6ef2e..c35a9eb66b 100644
--- a/dlfcn/dlopen.c
+++ b/dlfcn/dlopen.c
@@ -33,13 +33,6 @@ dlopen (const char *file, int mode)
 static_link_warning (dlopen)
 #endif
 
-void *
-dlopen_with_offset (const char *file, off_t offset, int mode)
-{
-  return __dlopen_with_offset (file, offset, mode, RETURN_ADDRESS (0));
-}
-static_link_warning (dlopen_with_offset)
-
 #else
 
 struct dlopen_args
@@ -97,23 +90,13 @@ __dlopen_common (struct dlopen_args *args)
 # endif
 }
 
+# ifdef SHARED
 void *
 __dlopen_with_offset (const char *file, off_t offset, int mode DL_CALLER_DECL)
 {
-# ifdef SHARED
   if (!rtld_active ())
     return _dlfcn_hook->dlopen_with_offset (file, offset, mode, DL_CALLER);
-# endif
-
-  struct dlopen_args oargs;
-  oargs.file = file;
-  oargs.offset = offset;
-  oargs.mode = mode;
-  oargs.caller = DL_CALLER;
-
-  return __dlopen_common (&oargs);
 }
-# ifdef SHARED
 strong_alias (__dlopen_with_offset, __google_dlopen_with_offset)
 # endif
 
diff --git a/elf/dl-load.c b/elf/dl-load.c
index b6c4aa8da0..3aa581692d 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -948,6 +948,9 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, off_t of
   else
     assert (r->r_state == RT_ADD);
 
+#ifdef SHARED
+  // This code could be linked into 'sln', which does not have _itoa.
+  // We only care about this when this is linked into ld-linux.
   if (offset != 0)
     {
       /* Google-specific: to help GDB, and for b/18243822, turn realname
@@ -964,6 +967,7 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, off_t of
       tmp[19] = '\0';
       strcat(realname, _itoa(offset, &tmp[18], 16, 0));
     }
+#endif
 
   /* Enter the new object in the list of loaded objects.  */
   l = _dl_new_object (realname, (offset ? realname : name), l_type, loader, mode, nsid);