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Nelson Chu 1a79004f61 RISC-V: Generate ELF priv attributes if priv instruction are explicited used.
We should generate the ELF priv attributes only if,

1. The priv attributes are already set in the assembly file.
2. The CSR are explicited used.
3. The privileged instruction are explicited used.

* There are four privileged instruction defined in the v1.11 priv spec:
`mret`, `sret`, `wfi` and `sfence.vma`.

* `sfence.vm` is dropped in the v1.10 priv spec.

* `uret` is actually a N-ext instruction.  So it is better to regard it as
an user instruction rather than the priv instruction.

* `hret` is used to return from traps in H-mode.  H-mode is removed since
the v1.10 priv spec, but probably be added in the new hypervisor spec.
Therefore, `hret` should be controlled by the hypervisor spec rather than
priv spec in the future.

* `dret` is a debug instruction.  We should record the debug spec versions
once it is explicited used in the future.

	gas/
	* config/tc-riscv.c (explicit_priv_attr): Rename explicit_csr to
	explicit_priv_attr.  It used to indicate CSR or priv instructions are
	explictly used.
	(riscv_is_priv_insn): Return True if it is a privileged instruction.
	(riscv_ip): Call riscv_is_priv_insn to check whether the instruction
	is privileged or not.  If it is, then set explicit_priv_attr to TRUE.
	(riscv_write_out_attrs): Clarification of when to generate the elf
	priv spec attributes.

	* testsuite/gas/riscv/attribute-11.s: Add comments.
	* testsuite/gas/riscv/attribute-14.s: New testcase.  Use symbol
	`priv_insn_<n>` to decide which priv instruction is expected to used.
	(<n> is a to g.)
	* testsuite/gas/riscv/attribute-14a.d: Likewise.
	* testsuite/gas/riscv/attribute-14b.d: Likewise.
	* testsuite/gas/riscv/attribute-14c.d: Likewise.
	* testsuite/gas/riscv/attribute-14d.d: Likewise.
	* testsuite/gas/riscv/attribute-14e.d: Likewise.
2020-06-23 09:38:12 +08:00
bfd Automatic date update in version.in 2020-06-23 00:00:06 +00:00
binutils binutils objdump.exp remote_file typo 2020-06-23 11:02:56 +09:30
config Sync config with GCC 2020-05-16 06:07:12 -07:00
contrib contrib: Update dg-extract-results.* from gcc 2020-05-15 11:41:22 +01:00
cpu cpu,gas,opcodes: remove no longer needed workaround from the BPF port 2020-06-04 16:17:42 +02:00
elfcpp [PATCH] gold: Set DF_1_PIE for -pie 2020-06-18 10:46:18 +01:00
etc texi2pod.pl: import support for @t{...} from gcc 2020-01-15 12:58:09 -05:00
gas RISC-V: Generate ELF priv attributes if priv instruction are explicited used. 2020-06-23 09:38:12 +08:00
gdb NEWS and documentation for alias default-args related concept and commands. 2020-06-22 21:16:25 +02:00
gdbserver gdbserver/linux-low: use std::list to store pending signals 2020-06-22 14:13:48 +02:00
gdbsupport gdbsupport: Drop now unused function 'stringify_argv' 2020-05-25 11:40:35 -04:00
gnulib gdb: update gnulib import 2020-02-22 20:37:18 -05:00
gold [PATCH] gold: Set DF_1_PIE for -pie 2020-06-18 10:46:18 +01:00
gprof Replace "if (x) free (x)" with "free (x)", gprof 2020-05-21 10:45:33 +09:30
include aarch64: Normalize and sort feature bit macros 2020-06-22 14:51:04 +01:00
intl Regen with blessed automake-1.15.1 2020-02-20 13:02:24 +10:30
ld Correct bfin XPASSes 2020-06-23 11:03:34 +09:30
libctf libctf: Mark bswap_identity_64 inline function as static. 2020-03-11 17:48:49 +10:30
libdecnumber Merge config/ changes from GCC. 2018-10-31 17:16:41 +00:00
libiberty Sync config and libiberty with GCC 2020-05-12 18:37:03 -07:00
opcodes RISC-V: Report warning when linking the objects with different priv specs. 2020-06-22 10:01:14 +08:00
readline Fix compilation of Readline on mingw.org's MinGW 2019-12-23 16:28:32 +02:00
sim sim: ppc: netbsd: Sync signal names with NetBSD 9.99.49 2020-03-12 16:07:37 +01:00
texinfo * texinfo/texinfo.tex: Update to version 2009-03-28.05. 2009-04-21 12:36:46 +00:00
zlib Merge changes from GCC for the config/ directory 2020-02-19 17:51:24 +00:00
.cvsignore
.gitattributes Add a .gitattributes file for use with git-merge-changelog 2014-07-25 18:07:23 -04:00
.gitignore Add profiling outputs to .gitignore 2019-12-26 06:54:58 +01:00
COPYING
COPYING.LIB
COPYING.LIBGLOSS Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
COPYING.NEWLIB 2013-10-01 Jeff Johnston <jjohnstn@redhat.com> 2013-10-01 18:14:04 +00:00
COPYING3
COPYING3.LIB
ChangeLog Since the pdp11-aout target does not support gdb, gdbserver or gprof these should be excluded in configure. 2020-04-21 10:27:50 +01:00
MAINTAINERS Move gdbserver to top level 2020-02-07 08:42:25 -07:00
Makefile.def Change gdbserver to use existing gdbsupport 2020-03-12 13:32:16 -06:00
Makefile.in Change gdbserver to use existing gdbsupport 2020-03-12 13:32:16 -06:00
Makefile.tpl Revert "Sync top level files with versions from gcc." 2019-05-30 11:17:19 +01:00
README
README-maintainer-mode Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ar-lib Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
compile Update from upstream Automake 2014-11-16 13:43:48 +01:00
config-ml.in Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.guess Update top level config files with copies from the official repository. 2020-01-18 13:43:19 +00:00
config.rpath Remove freebsd1 from libtool.m4 macros and config.rpath. 2011-02-13 21:00:14 +00:00
config.sub Update top level config files with copies from the official repository. 2020-01-18 13:43:19 +00:00
configure Since the pdp11-aout target does not support gdb, gdbserver or gprof these should be excluded in configure. 2020-04-21 10:27:50 +01:00
configure.ac Since the pdp11-aout target does not support gdb, gdbserver or gprof these should be excluded in configure. 2020-04-21 10:27:50 +01:00
depcomp Update from upstream Automake 2014-11-16 13:43:48 +01:00
djunpack.bat * djunpack.bat: Use ".." quoting in Sed command, for the sake of 2009-03-27 13:37:09 +00:00
install-sh Update from upstream Automake 2014-11-16 13:43:48 +01:00
libtool.m4 Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ltgcc.m4 * libtool.m4: Update to libtool 2.2.6. 2008-09-29 15:28:14 +00:00
ltmain.sh PR target/59788 2014-02-06 11:01:57 +01:00
ltoptions.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
ltsugar.m4 * libtool.m4: Update to libtool 2.2.6. 2008-09-29 15:28:14 +00:00
ltversion.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
lt~obsolete.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
makefile.vms
missing Update from upstream Automake 2014-11-16 13:43:48 +01:00
mkdep
mkinstalldirs Update from upstream Automake 2014-11-16 13:43:48 +01:00
move-if-change Update `move-if-change' from gnulib 2014-11-16 17:04:02 +01:00
multilib.am Merge autoconf / automake update changes from GCC. 2018-10-31 17:10:56 +00:00
setup.com 2009-09-01 Tristan Gingold <gingold@adacore.com> 2009-09-01 13:38:26 +00:00
src-release.sh Move gdbserver to top level 2020-02-07 08:42:25 -07:00
symlink-tree
test-driver Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ylwrap Update from upstream Automake 2014-11-16 13:43:48 +01:00

README

		   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.