From 92df5673de18779b612609afa4f687e33e5ecb6e Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 18 Mar 2015 01:51:38 +0000
Subject: [PATCH 03/30] nativesdk-glibc: Raise the size of arrays containing dl
 paths

This patch puts the dynamic loader path in the binaries, SYSTEM_DIRS strings
and lengths as well as ld.so.cache path in the dynamic loader to specific
sections in memory. The sections that contain paths have been allocated a 4096
byte section, which is the maximum path length in linux. This will allow the
relocating script to parse the ELF binary, detect the section and easily replace
the strings in a certain path.

Upstream-Status: Inappropriate [SDK specific]

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 elf/dl-cache.c             | 4 ++++
 elf/dl-load.c              | 4 ++--
 elf/interp.c               | 2 +-
 elf/ldconfig.c             | 3 +++
 elf/rtld.c                 | 5 +++--
 iconv/gconv_conf.c         | 2 +-
 sysdeps/generic/dl-cache.h | 4 ----
 7 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/elf/dl-cache.c b/elf/dl-cache.c
index d8d1e2344e..d2247bfc4f 100644
--- a/elf/dl-cache.c
+++ b/elf/dl-cache.c
@@ -133,6 +133,10 @@ do									      \
 while (0)
 
 
+const char LD_SO_CACHE[4096] __attribute__ ((section (".ldsocache"))) =
+		SYSCONFDIR "/ld.so.cache";
+
+
 int
 _dl_cache_libcmp (const char *p1, const char *p2)
 {
diff --git a/elf/dl-load.c b/elf/dl-load.c
index 2bd9bc27f2..4170cc1a09 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -110,8 +110,8 @@ static size_t max_capstrlen attribute_relro;
    gen-trusted-dirs.awk.  */
 #include "trusted-dirs.h"
 
-static const char system_dirs[] = SYSTEM_DIRS;
-static const size_t system_dirs_len[] =
+static const char system_dirs[4096] __attribute__ ((section (".sysdirs"))) = SYSTEM_DIRS;
+volatile static const size_t system_dirs_len[] __attribute__ ((section (".sysdirslen"))) =
 {
   SYSTEM_DIRS_LEN
 };
diff --git a/elf/interp.c b/elf/interp.c
index 243829f5f7..0e74241703 100644
--- a/elf/interp.c
+++ b/elf/interp.c
@@ -18,5 +18,5 @@
 
 #include <runtime-linker.h>
 
-const char __invoke_dynamic_linker__[] __attribute__ ((section (".interp")))
+const char __invoke_dynamic_linker__[4096] __attribute__ ((section (".interp")))
   = RUNTIME_LINKER;
diff --git a/elf/ldconfig.c b/elf/ldconfig.c
index 206cd51df6..2fd4fb54ae 100644
--- a/elf/ldconfig.c
+++ b/elf/ldconfig.c
@@ -168,6 +168,9 @@ static struct argp argp =
   options, parse_opt, NULL, doc, NULL, more_help, NULL
 };
 
+
+extern const char LD_SO_CACHE[4096] __attribute__ ((section (".ldsocache")));
+
 /* Check if string corresponds to an important hardware capability or
    a platform.  */
 static int
diff --git a/elf/rtld.c b/elf/rtld.c
index 5d97f41b7b..26c5fef929 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -130,6 +130,7 @@ dso_name_valid_for_suid (const char *p)
     }
   return *p != '\0';
 }
+extern const char LD_SO_CACHE[4096] __attribute__ ((section (".ldsocache")));
 
 /* LD_AUDIT variable contents.  Must be processed before the
    audit_list below.  */
@@ -1001,12 +1002,12 @@ of this helper program; chances are you did not intend to run this program.\n\
   --list                list all dependencies and how they are resolved\n\
   --verify              verify that given object really is a dynamically linked\n\
 			object we can handle\n\
-  --inhibit-cache       Do not use " LD_SO_CACHE "\n\
+  --inhibit-cache       Do not use %s\n\
   --library-path PATH   use given PATH instead of content of the environment\n\
 			variable LD_LIBRARY_PATH\n\
   --inhibit-rpath LIST  ignore RUNPATH and RPATH information in object names\n\
 			in LIST\n\
-  --audit LIST          use objects named in LIST as auditors\n");
+  --audit LIST          use objects named in LIST as auditors\n", LD_SO_CACHE);
 
       ++_dl_skip_args;
       --_dl_argc;
diff --git a/iconv/gconv_conf.c b/iconv/gconv_conf.c
index ae8937cba0..f321ee419e 100644
--- a/iconv/gconv_conf.c
+++ b/iconv/gconv_conf.c
@@ -36,7 +36,7 @@
 
 
 /* This is the default path where we look for module lists.  */
-static const char default_gconv_path[] = GCONV_PATH;
+static char default_gconv_path[4096] __attribute__ ((section (".gccrelocprefix"))) = GCONV_PATH;
 
 /* Type to represent search path.  */
 struct path_elem
diff --git a/sysdeps/generic/dl-cache.h b/sysdeps/generic/dl-cache.h
index bc8b40331d..b0fdd2144b 100644
--- a/sysdeps/generic/dl-cache.h
+++ b/sysdeps/generic/dl-cache.h
@@ -27,10 +27,6 @@
   ((flags) == 1 || (flags) == _DL_CACHE_DEFAULT_ID)
 #endif
 
-#ifndef LD_SO_CACHE
-# define LD_SO_CACHE SYSCONFDIR "/ld.so.cache"
-#endif
-
 #ifndef add_system_dir
 # define add_system_dir(dir) add_dir (dir)
 #endif
-- 
2.20.1

