diff options
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r-- | libc/sysdeps/linux/common/Makefile | 1 | ||||
-rw-r--r-- | libc/sysdeps/linux/common/Makefile.in | 5 | ||||
-rw-r--r-- | libc/sysdeps/linux/common/dl-osinfo.h | 64 | ||||
-rw-r--r-- | libc/sysdeps/linux/common/ssp.c | 2 |
4 files changed, 69 insertions, 3 deletions
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 |