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Igor Tsimbalist 14e335edc8 CET shouldn't be enabled in 32-bit run-time libraries by defualt 
ENDBR32 and RDSSPD are multi-byte NOPs on x86-64 processors and
newer x86 processors, starting Pentium Pro.  They are UD on older
32-bit processors. Detect this at configure time and adjust the
default value for enable_cet. GCC will enable CET in 32-bit run-time
libraries in any case if --enable-cet is used to configure GCC.

	PR target/84148
	* config/cet.m4: Check if target support multi-byte NOPS (SSE).
	* libatomic/configure: Regenerate.
	* libbacktrace/configure: Likewise.
	* libgcc/configure: Likewise.
	* libgfortran/configure: Likewise.
	* libgomp/configure: Likewise.
	* libitm/configure: Likewise.
	* libmpx/configure: Likewise.
	* libobjc/configure: Likewise.
	* libquadmath/configure: Likewise.
	* libsanitizer/configure: Likewise.
	* libssp/configure: Likewise.
	* libstdc++-v3/configure: Likewise.
	* libvtv/configure: Likewise.

From-SVN: r257809
2018-02-19 17:25:49 +01:00
..
aclocal.m4
alloc.c
atomic.c
backtrace-supported.h.in
backtrace.c
backtrace.h
btest.c elf.c (elf_add): Close descriptor if we use a debugfile. 2018-01-31 23:23:21 +00:00
ChangeLog CET shouldn't be enabled in 32-bit run-time libraries by defualt 2018-02-19 17:25:49 +01:00
ChangeLog.jit
config.h.in
configure CET shouldn't be enabled in 32-bit run-time libraries by defualt 2018-02-19 17:25:49 +01:00
configure.ac
dwarf.c
edtest2.c
edtest.c
elf.c re PR other/82368 (with r253275 several new test cases in libbacktrace fail) 2018-02-15 12:32:27 +01:00
fileline.c
filetype.awk
internal.h
Makefile.am
Makefile.in
mmap.c re PR other/68239 (libbacktrace allocation is sometimes very slow) 2018-01-25 02:24:45 +00:00
mmapio.c
nounwind.c
pecoff.c * pecoff.c (coff_add): Only release syms_view if it is valid. 2018-01-25 15:38:41 +00:00
posix.c
print.c
read.c
README
simple.c
sort.c
state.c
stest.c
testlib.c
testlib.h
ttest.c
unknown.c
xcoff.c xcoff.c (xcoff_incl_compare): New function. 2018-01-19 17:45:24 +00:00
ztest.c elf.c (codes): Fix size to be 288. 2018-01-17 01:39:05 +00:00

README 

The libbacktrace library
Initially written by Ian Lance Taylor <iant@google.com>

The libbacktrace library may be linked into a program or library and
used to produce symbolic backtraces.  Sample uses would be to print a
detailed backtrace when an error occurs or to gather detailed
profiling information.

The libbacktrace library is provided under a BSD license.  See the
source files for the exact license text.

The public functions are declared and documented in the header file
backtrace.h, which should be #include'd by a user of the library.

Building libbacktrace will generate a file backtrace-supported.h,
which a user of the library may use to determine whether backtraces
will work.  See the source file backtrace-supported.h.in for the
macros that it defines.

As of September 2012, libbacktrace only supports ELF executables with
DWARF debugging information.  The library is written to make it
straightforward to add support for other object file and debugging
formats.