From 237277e9a8133c64026b736b1427141e71655330 Mon Sep 17 00:00:00 2001
From: "Peter S. Mazinger" <ps.m@gmx.net>
Date: Thu, 27 Oct 2005 22:58:52 +0000
Subject: Moved guard_setup to dl-osinfo.h (used commonly by ldso and libc).
Renamed to _dl_setup_stack_chk_guard, as in glibc. SSP requires now
binutils-2.16.1 and newer. Add NOT_IN_libc/IS_IN_libc. Began using -DSHARED
in uClibc_main.c, there are more candidates in there. Move back
dl_protect_relro to it's earlier place.
---
libc/Makefile.in | 14 +-------
libc/misc/file/Makefile.in | 3 +-
libc/misc/internals/Makefile.in | 15 ++++----
libc/misc/internals/__uClibc_main.c | 57 ++++++++++---------------------
libc/stdlib/Makefile.in | 13 ++++---
libc/sysdeps/linux/common/Makefile | 1 +
libc/sysdeps/linux/common/Makefile.in | 5 ++-
libc/sysdeps/linux/common/dl-osinfo.h | 64 +++++++++++++++++++++++++++++++++++
libc/sysdeps/linux/common/ssp.c | 2 ++
9 files changed, 104 insertions(+), 70 deletions(-)
create mode 100644 libc/sysdeps/linux/common/dl-osinfo.h
(limited to 'libc')
diff --git a/libc/Makefile.in b/libc/Makefile.in
index 33a1070d9..62a522066 100644
--- a/libc/Makefile.in
+++ b/libc/Makefile.in
@@ -39,19 +39,7 @@ VERSION_SCRIPT:=${shell if [ -f $(libc_DIR)/sysdeps/linux/$(TARGET_ARCH)/libc.ma
EXTRA_LINK_OPTS:=$(VERSION_SCRIPT) -init __uClibc_init
EXTRA_LINK_LIBS:=$(libc_OUT)/misc/internals/interp.os $(top_builddir)lib/$(UCLIBC_LDSO) $(LIBGCC) # $(LDADD_LIBFLOAT)
-ifeq ($(DOPIC),y)
-libc-a-y: $(libc-a-pic-y)
-else
-libc-a-y: $(libc-a-y)
-endif
-
-libc-so-y: $(libc-so-y)
-
-crt-y: $(crt-y)
-other-y: $(other-y)
-
objclean-y+=libc_clean
lib-a-y+=$(top_builddir)lib/libc.a
-lib-a-pic-y+=$(top_builddir)lib/libc.a
-lib-so-y+=$(top_builddir)lib/libc.so $(top_builddir)lib/$(NONSHARED_LIBNAME) crt-y
+lib-so-y+=$(top_builddir)lib/libc.so $(top_builddir)lib/$(NONSHARED_LIBNAME) crt-y other-y
diff --git a/libc/misc/file/Makefile.in b/libc/misc/file/Makefile.in
index 76eff7868..58da3e2a3 100644
--- a/libc/misc/file/Makefile.in
+++ b/libc/misc/file/Makefile.in
@@ -19,7 +19,8 @@ libc-a-y+=$(MISC_FILE_OBJ)
libc-a-pic-y+=$(MISC_FILE_OBJ:.o=.os)
libc-so-y+=$(MISC_FILE_OBJ:.o=.os)
-libc-multi-y+=$(MISC_FILE_SRC)
+libc-multi-y+=$(MISC_FILE_DIR)/lockf.c
+libc-nomulti-y+=$(MISC_FILE_OUT)/lockf64.o
objclean-y+=misc_file_objclean
diff --git a/libc/misc/internals/Makefile.in b/libc/misc/internals/Makefile.in
index de611323e..a9dc2634f 100644
--- a/libc/misc/internals/Makefile.in
+++ b/libc/misc/internals/Makefile.in
@@ -8,7 +8,7 @@
CFLAGS-__uClibc_main.c=$(SSP_DISABLE_FLAGS)
-CSRC:=__uClibc_main.c tempname.c errno.c __errno_location.c __h_errno_location.c
+CSRC:=tempname.c errno.c __errno_location.c __h_errno_location.c
MISC_INTERNALS_DIR:=$(top_srcdir)libc/misc/internals
MISC_INTERNALS_OUT:=$(top_builddir)libc/misc/internals
@@ -16,7 +16,7 @@ MISC_INTERNALS_OUT:=$(top_builddir)libc/misc/internals
MISC_INTERNALS_SRC:=$(patsubst %.c,$(MISC_INTERNALS_DIR)/%.c,$(CSRC))
MISC_INTERNALS_OBJ:=$(patsubst %.c,$(MISC_INTERNALS_OUT)/%.o,$(CSRC))
-MISC_INTERNALS_OBJS:=$(MISC_INTERNALS_OBJ) $(MISC_INTERNALS_OUT)/static.o
+STATIC_SRC:=__uClibc_main.c static.c
$(MISC_INTERNALS_OUT)/interp.c: $(MISC_INTERNALS_DIR)/Makefile.in
echo "/* Force shared libraries to know about the correct library loader */" > $@
@@ -26,16 +26,15 @@ $(MISC_INTERNALS_OUT)/interp.c: $(MISC_INTERNALS_DIR)/Makefile.in
"(\".interp\"))) =\""$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)"\";" >> $@
echo "#endif" >> $@
-libc-a-y+=$(MISC_INTERNALS_OBJS)
-libc-a-pic-y+=$(MISC_INTERNALS_OBJS:.o=.os)
-# this is OBJ, not OBJS !!!, static does not go into .so
+libc-a-y+=$(MISC_INTERNALS_OBJ)
libc-so-y+=$(MISC_INTERNALS_OBJ:.o=.os)
+libc-shared-y+=$(MISC_INTERNALS_OUT)/__uClibc_main.oS
+libc-static-y+=$(patsubst %.c,$(MISC_INTERNALS_OUT)/%.o,$(STATIC_SRC))
other-y+=$(MISC_INTERNALS_OUT)/interp.os
-libc-multi-y+=$(filter-out $(MISC_INTERNALS_DIR)/__uClibc_main.c,$(MISC_INTERNALS_SRC))
-libc-nomulti-y+=$(MISC_INTERNALS_OUT)/__uClibc_main.o
+libc-multi-y+=$(MISC_INTERNALS_SRC)
objclean-y+=misc_internals_objclean
misc_internals_objclean:
- $(RM) $(MISC_INTERNALS_OUT)/{*.{o,os},interp.c}
+ $(RM) $(MISC_INTERNALS_OUT)/{*.{o,os,oS},interp.c}
diff --git a/libc/misc/internals/__uClibc_main.c b/libc/misc/internals/__uClibc_main.c
index 1f2061e58..e7c2c4abf 100644
--- a/libc/misc/internals/__uClibc_main.c
+++ b/libc/misc/internals/__uClibc_main.c
@@ -25,15 +25,21 @@
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
+#ifndef SHARED
+/* probably all the weak_*function stuff below should be in here */
#ifdef __UCLIBC_HAS_SSP__
-#include <ssp-internal.h>
+#include <dl-osinfo.h>
+#ifndef THREAD_SET_STACK_GUARD
+/* Only exported for architectures that don't store the stack guard canary
+ * in thread local area. */
#include <stdint.h>
-
/* for gcc-4.1 non-TLS */
uintptr_t __stack_chk_guard attribute_relro;
/* for gcc-3.x + Etoh ssp */
strong_alias(__stack_chk_guard,__guard)
#endif
+#endif
+#endif
/*
* Prototypes.
@@ -49,10 +55,6 @@ extern void weak_function _locale_init(void);
extern void weak_function __pthread_initialize_minimal(void);
#endif
-
-
-
-
/*
* Declare the __environ global variable and create a weak alias environ.
* Note: Apparently we must initialize __environ to ensure that the weak
@@ -64,7 +66,6 @@ weak_alias(__environ, environ);
size_t __pagesize = 0;
const char *__progname = 0;
-
#ifndef O_NOFOLLOW
# define O_NOFOLLOW 0
#endif
@@ -110,36 +111,6 @@ static int __check_suid(void)
return 1;
}
-#ifdef __UCLIBC_HAS_SSP__
-static __always_inline uintptr_t _dl_guard_setup(void)
-{
- uintptr_t ret;
-#ifndef __SSP_QUICK_CANARY__
- {
- int fd = OPEN("/dev/urandom", O_RDONLY);
- if (fd >= 0) {
- size_t size = READ(fd, &ret, sizeof(ret));
- CLOSE(fd);
- if (size == (size_t) sizeof(ret))
- return ret;
- }
- }
-#endif /* ifndef __SSP_QUICK_CANARY__ */
-
- /* Start with the "terminator canary". */
- ret = 0xFF0A0D00UL;
-
- /* Everything failed? Or we are using a weakened model of the
- * terminator canary */
- {
- struct timeval tv;
- if (GETTIMEOFDAY(&tv, NULL) != (-1))
- ret ^= tv.tv_usec ^ tv.tv_sec;
- }
- return ret;
-}
-#endif /* __UCLIBC_HAS_SSP__ */
-
/* __uClibc_init completely initialize uClibc so it is ready to use.
*
* On ELF systems (with a dynamic loader) this function must be called
@@ -174,10 +145,16 @@ void __uClibc_init(void)
__pthread_initialize_minimal();
#endif
-#ifdef __UCLIBC_HAS_SSP__
- uintptr_t stack_chk_guard = _dl_guard_setup();
- /* for gcc-4.1 non-TLS */
+#ifndef SHARED
+# ifdef __UCLIBC_HAS_SSP__
+ /* Set up the stack checker's canary. */
+ uintptr_t stack_chk_guard = _dl_setup_stack_chk_guard();
+# ifdef THREAD_SET_STACK_GUARD
+ THREAD_SET_STACK_GUARD (stack_chk_guard);
+# else
__stack_chk_guard = stack_chk_guard;
+# endif
+# endif
#endif
#ifdef __UCLIBC_HAS_LOCALE__
diff --git a/libc/stdlib/Makefile.in b/libc/stdlib/Makefile.in
index 3b00c8115..236d20cda 100644
--- a/libc/stdlib/Makefile.in
+++ b/libc/stdlib/Makefile.in
@@ -106,15 +106,18 @@ $(STDLIB_MOBJ1x) $(STDLIB_MOBJ1x:.o=.os): $(STDLIB_MSRC1)
$(STDLIB_MOBJ2x) $(STDLIB_MOBJ2x:.o=.os): $(STDLIB_MSRC2)
$(compile.m) -D__UCLIBC_DO_XLOCALE
-libc-a-y+=$(STDLIB_OBJS) $(STDLIB_OUT)/atexit.o
-libc-a-pic-y+=$(STDLIB_OBJS:.o=.os) $(STDLIB_OUT)/atexit.os
+libc-a-y+=$(STDLIB_OBJS)
+libc-static-y+=$(STDLIB_OUT)/atexit.o
libc-so-y+=$(STDLIB_OBJS:.o=.os)
# this should always be the PIC version, because it could be used in shared libs
libc-nonshared-y+=$(STDLIB_OUT)/atexit.os
-CFLAGS-multi-y+=$(STDLIB_DEF)
-libc-multi-y+=$(STDLIB_SRC) $(STDLIB_MSRC)
-libc-nomulti-y+=$(STDLIB_MOBJx)
+#CFLAGS-multi-y+=$(STDLIB_DEF)
+#libc-multi-y+=$(STDLIB_SRC) $(STDLIB_MSRC)
+#libc-nomulti-y+=$(STDLIB_MOBJx)
+#libc-multi-y+=$(STDLIB_MSRC)
+#libc-nomulti-y+=$(STDLIB_OBJ) $(STDLIB_MOBJx)
+libc-nomulti-y+=$(STDLIB_OBJS)
objclean-y+=stdlib_objclean
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile
index e45c58961..704f0350b 100644
--- a/libc/sysdeps/linux/common/Makefile
+++ b/libc/sysdeps/linux/common/Makefile
@@ -56,6 +56,7 @@ $(OBJS) $(NONSHARED_OBJS): %.o : %.c
headers:
$(LN) -fs ../libc/sysdeps/linux/common/fpu_control.h $(TOPDIR)/include/
+ $(LN) -fs ../libc/sysdeps/linux/common/dl-osinfo.h $(TOPDIR)/include/
clean:
$(RM) *.o *~ core
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index 85826913e..ce7d8f90d 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -31,9 +31,7 @@ COMMON_SRC:=$(patsubst %.c,$(COMMON_DIR)/%.c,$(CSRC))
COMMON_OBJ:=$(patsubst %.c,$(COMMON_OUT)/%.o,$(CSRC))
libc-a-y+=$(COMMON_OBJ)
-libc-a-$(UCLIBC_HAS_SSP)+=$(COMMON_OUT)/ssp-local.o
-libc-a-pic-y+=$(COMMON_OBJ:.o=.os)
-libc-a-pic-$(UCLIBC_HAS_SSP)+=$(COMMON_OUT)/ssp-local.os
+libc-a-static-$(UCLIBC_HAS_SSP)+=$(COMMON_OUT)/ssp-local.o
libc-so-y+=$(COMMON_OBJ:.o=.os)
libc-nonshared-$(UCLIBC_HAS_SSP)+=$(COMMON_OUT)/ssp-local.os
@@ -50,3 +48,4 @@ headers-y+=common_headers
common_headers:
$(LN) -fs ../libc/sysdeps/linux/common/fpu_control.h $(top_builddir)include/
+ $(LN) -fs ../libc/sysdeps/linux/common/dl-osinfo.h $(top_builddir)include/
diff --git a/libc/sysdeps/linux/common/dl-osinfo.h b/libc/sysdeps/linux/common/dl-osinfo.h
new file mode 100644
index 000000000..ee3e2ce99
--- /dev/null
+++ b/libc/sysdeps/linux/common/dl-osinfo.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _DL_OSINFO_H
+#define _DL_OSINFO_H 1
+
+#include <features.h>
+
+#ifdef __UCLIBC_HAS_SSP__
+#include <stdint.h>
+#include <sys/time.h>
+
+#ifdef IS_IN_libc
+#include <ssp-internal.h>
+#if 0
+#ifndef __SSP_QUICK_CANARY__
+#define OPEN __libc_open
+#define READ __libc_read
+#define CLOSE __libc_close
+#endif
+#define GETTIMEOFDAY gettimeofday
+#endif
+#else
+#ifndef __SSP_QUICK_CANARY__
+#define OPEN _dl_open
+#define READ _dl_read
+#define CLOSE _dl_close
+#endif
+#define GETTIMEOFDAY _dl_gettimeofday
+#endif
+
+static __always_inline uintptr_t _dl_setup_stack_chk_guard(void)
+{
+ uintptr_t ret;
+#ifndef __SSP_QUICK_CANARY__
+ {
+ int fd = OPEN("/dev/urandom", O_RDONLY, 0);
+ if (fd >= 0) {
+ size_t size = READ(fd, &ret, sizeof(ret));
+ CLOSE(fd);
+ if (size == (size_t) sizeof(ret))
+ return ret;
+ }
+ }
+#endif /* !__SSP_QUICK_CANARY__ */
+
+ /* Start with the "terminator canary". */
+ ret = 0xFF0A0D00UL;
+
+ /* Everything failed? Or we are using a weakened model of the
+ * terminator canary */
+ {
+ struct timeval tv;
+ if (GETTIMEOFDAY(&tv, NULL) != (-1))
+ ret ^= tv.tv_usec ^ tv.tv_sec;
+ }
+ return ret;
+}
+#endif /* __UCLIBC_HAS_SSP__ */
+
+#endif /* _DL_OSINFO_H */
diff --git a/libc/sysdeps/linux/common/ssp.c b/libc/sysdeps/linux/common/ssp.c
index 7791a0104..2f3a28ba4 100644
--- a/libc/sysdeps/linux/common/ssp.c
+++ b/libc/sysdeps/linux/common/ssp.c
@@ -87,6 +87,7 @@ void __attribute__ ((noreturn)) __stack_chk_fail(void)
terminate();
}
+#if 0
void __attribute__ ((noreturn)) __chk_fail(void)
{
extern char *__progname;
@@ -101,3 +102,4 @@ void __attribute__ ((noreturn)) __chk_fail(void)
while(1)
terminate();
}
+#endif
--
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