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From e76048898ae9aa49dc70d6f9b1bbc22082e61fe3 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 03/24] 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 +++--
sysdeps/generic/dl-cache.h | 4 ----
6 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/elf/dl-cache.c b/elf/dl-cache.c
index dec49bc..862f1d8 100644
--- a/elf/dl-cache.c
+++ b/elf/dl-cache.c
@@ -132,6 +132,10 @@ do \
while (0)
+const char LD_SO_CACHE[4096] __attribute__ ((section (".ldsocache"))) =
+ SYSCONFDIR "/ld.so.cache";
+
+
int
internal_function
_dl_cache_libcmp (const char *p1, const char *p2)
diff --git a/elf/dl-load.c b/elf/dl-load.c
index c4a42e9..acf6c03 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -106,8 +106,8 @@ static size_t max_capstrlen attribute_relro;
/* Get the generated information about the trusted directories. */
#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 422ea95e..6d61a36 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 f54ec22..0e78a83 100644
--- a/elf/ldconfig.c
+++ b/elf/ldconfig.c
@@ -167,6 +167,9 @@ 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 52160df..80f0582 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -99,6 +99,7 @@ uintptr_t __pointer_chk_guard_local
strong_alias (__pointer_chk_guard_local, __pointer_chk_guard)
#endif
+extern const char LD_SO_CACHE[4096] __attribute__ ((section (".ldsocache")));
/* List of auditing DSOs. */
static struct audit_list
@@ -873,12 +874,12 @@ 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/sysdeps/generic/dl-cache.h b/sysdeps/generic/dl-cache.h
index 70d4aeb..5c726d0 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
Index: git/iconv/gconv_conf.c
===================================================================
--- git.orig/iconv/gconv_conf.c
+++ git/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;
/* The path elements, as determined by the __gconv_get_path function.
All path elements end in a slash. */
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