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Weimin Pan 58afddc6c7 gdb: SPARC ADI support
The M7 processor supports an Application Data Integrity (ADI) feature
that detects invalid data accesses.  When software allocates data, it
chooses a 4-bit version number, sets the version in the upper 4 bits
of the 64-bit pointer to that data, and stores the 4-bit version in
every cacheline of the object.  Hardware saves the latter in spare
bits in the cache and memory hierarchy. On each load and store, the
processor compares the upper 4 VA (virtual address) bits to the
cacheline's version. If there is a mismatch, the processor generates a
version mismatch trap which can be either precise or disrupting.  The
trap is an error condition which the kernel delivers to the process as
a SIGSEGV signal.

The upper 4 bits of the VA represent a version and are not part of the
true address.  The processor clears these bits and sign extends bit 59
to generate the true address.

Note that 32-bit applications cannot use ADI.

This patch adds ADI support in gdb which allows the user to examine
current version tags and assign new version tags in the program.  It
also catches and reports precise or disrupting memory corruption
traps.

gdb/ChangeLog:
2017-08-07  Weimin Pan  <weimin.pan@oracle.com>

	* sparc64-tdep.h: (adi_normalize_address): New export.
	* sparc-nat.h: (open_adi_tag_fd): New export.
	* sparc64-linux-nat.c: (open_adi_tag_fd): New function.
	* sparc64-linux-tdep.c:
	(SEGV_ACCADI, SEGV_ADIDERR, SEGV_ADIPERR) New defines.
	(sparc64_linux_handle_segmentation_fault): New function.
	(sparc64_linux_init_abi): Register
	sparc64_linux_handle_segmentation_fault
	* sparc64-tdep.c: Include cli-utils.h,gdbcmd.h,auxv.h.
	(sparc64_addr_bits_remove): New function.
	(sparc64_init_abi): Register sparc64_addr_bits_remove.
	(MAX_PROC_NAME_SIZE): New macro.
	(AT_ADI_BLKSZ, AT_ADI_NBITS, AT_ADI_UEONADI) New defines.
	(sparc64adilist): New variable.
	(adi_proc_list): New variable.
	(find_adi_info): New function.
	(add_adi_info): New function.
	(get_adi_info_proc): New function.
	(get_adi_info): New function.
	(info_adi_command): New function.
	(read_maps_entry): New function.
	(adi_available): New function.
	(adi_normalize_address): New function.
	(adi_align_address): New function.
	(adi_convert_byte_count): New function.
	(adi_tag_fd): New function.
	(adi_is_addr_mapped): New function.
	(adi_read_versions): New function.
	(adi_write_versions): New function.
	(adi_print_versions): New function.
	(do_examine): New function.
	(do_assign): New function.
	(adi_examine_command): New function.
	(adi_assign_command): New function.
	(_initialize_sparc64_adi_tdep): New function.

gdb/doc/ChangeLog:
2017-08-07  Weimin Pan  <weimin.pan@oracle.com>

	* gdb.texinfo (Architectures): Add new Sparc64 section to document
	ADI support.
	* NEWS: Add "adi examine" and "adi assign" commands.

gdb/testsuite/ChangeLog:
2017-08-07  Weimin Pan  <weimin.pan@oracle.com>

	* gdb.arch/sparc64-adi.exp: New file.
	* gdb.arch/sparc64-adi.c: New file.
2017-08-23 10:57:37 +02:00
bfd Automatic date update in version.in 2017-08-23 00:00:48 +00:00
binutils Add test of V2 GNU build attribute notes. 2017-08-17 14:51:31 +01:00
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gas Assemble powerpc vle lsp tests with -a32 2017-08-23 07:37:22 +09:30
gdb gdb: SPARC ADI support 2017-08-23 10:57:37 +02:00
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include [PowerPC VLE] Add LSP (Lightweight Signal Processing) instruction support 2017-08-21 23:29:13 +09:30
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ld Remove pr19161 test hppa xfail 2017-08-23 08:58:42 +09:30
libdecnumber
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		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.