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8f595e9b4f
1. Remove the -mriscv-isa-version and --with-riscv-isa-version options.
We can still use -march to choose the version for each extensions, so there is
no need to add these.
2. Change the arguments of options from [1p9|1p9p1|...] to [1.9|1.9.1|...].
Unlike the architecture string has specified by spec, ther is no need to do
the same thing for options.
3. Spilt the patches to reduce the burdens of review.
[PATCH 3/7] RISC-V: Support new GAS options and configure options to set ISA versions
to
[PATCH v2 3/9] RISC-V: Support GAS option -misa-spec to set ISA versions
[PATCH v2 4/9] RISC-V: Support configure options to set ISA versions by default.
[PATCH 4/7] RISC-V: Support version checking for CSR according to privilege version.
to
[PATCH v2 5/9] RISC-V: Support version checking for CSR according to privilege spec version.
[PATCH v2 6/9] RISC-V: Support configure option to choose the privilege spec version.
4. Use enum class rather than string to compare the choosen ISA spec in opcodes/riscv-opc.c.
The behavior is same as comparing the choosen privilege spec.
include * opcode/riscv.h: Include "bfd.h" to support bfd_boolean.
(enum riscv_isa_spec_class): New enum class. All supported ISA spec
belong to one of the class
(struct riscv_ext_version): New structure holds version information
for the specific ISA.
* opcode/riscv-opc.h (DECLARE_CSR): There are two version information,
define_version and abort_version. The define_version means which
privilege spec is started to define the CSR, and the abort_version
means which privilege spec is started to abort the CSR. If the CSR is
valid for the newest spec, then the abort_version should be
PRIV_SPEC_CLASS_DRAFT.
(DECLARE_CSR_ALIAS): Same as DECLARE_CSR, but only for the obselete CSR.
* opcode/riscv.h (enum riscv_priv_spec_class): New enum class. Define
the current supported privilege spec versions.
(struct riscv_csr_extra): Add new fields to store more information
about the CSR. We use these information to find the suitable CSR
address when user choosing a specific privilege spec.
binutils * dwarf.c: Updated since DECLARE_CSR is changed.
opcodes * riscv-opc.c (riscv_ext_version_table): The table used to store
all information about the supported spec and the corresponding ISA
versions. Currently, only Zicsr is supported to verify the
correctness of Z sub extension settings. Others will be supported
in the future patches.
(struct isa_spec_t, isa_specs): List for all supported ISA spec
classes and the corresponding strings.
(riscv_get_isa_spec_class): New function. Get the corresponding ISA
spec class by giving a ISA spec string.
* riscv-opc.c (struct priv_spec_t): New structure.
(struct priv_spec_t priv_specs): List for all supported privilege spec
classes and the corresponding strings.
(riscv_get_priv_spec_class): New function. Get the corresponding
privilege spec class by giving a spec string.
(riscv_get_priv_spec_name): New function. Get the corresponding
privilege spec string by giving a CSR version class.
* riscv-dis.c: Updated since DECLARE_CSR is changed.
* riscv-dis.c: Add new disassembler option -Mpriv-spec to dump the CSR
according to the chosen version. Build a hash table riscv_csr_hash to
store the valid CSR for the chosen pirv verison. Dump the direct
CSR address rather than it's name if it is invalid.
(parse_riscv_dis_option_without_args): New function. Parse the options
without arguments.
(parse_riscv_dis_option): Call parse_riscv_dis_option_without_args to
parse the options without arguments first, and then handle the options
with arguments. Add the new option -Mpriv-spec, which has argument.
* riscv-dis.c (print_riscv_disassembler_options): Add description
about the new OBJDUMP option.
ld * testsuite/ld-riscv-elf/attr-merge-arch-01.d: Updated
priv attributes according to the -mpriv-spec option.
* testsuite/ld-riscv-elf/attr-merge-arch-02.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-arch-03.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-priv-spec-a.s: Likewise.
* testsuite/ld-riscv-elf/attr-merge-priv-spec-b.s: Likewise.
* testsuite/ld-riscv-elf/attr-merge-priv-spec.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-stack-align.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-strict-align-01.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-strict-align-02.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-strict-align-03.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-strict-align-04.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-strict-align-05.d: Likewise.
bfd * elfxx-riscv.h (riscv_parse_subset_t): Add new callback function
get_default_version. It is used to find the default version for
the specific extension.
* elfxx-riscv.c (riscv_parsing_subset_version): Remove the parameters
default_major_version and default_minor_version. Add new bfd_boolean
parameter *use_default_version. Set it to TRUE if we need to call
the callback rps->get_default_version to find the default version.
(riscv_parse_std_ext): Call rps->get_default_version if we fail to find
the default version in riscv_parsing_subset_version, and then call
riscv_add_subset to add the subset into subset list.
(riscv_parse_prefixed_ext): Likewise.
(riscv_std_z_ext_strtab): Support Zicsr extensions.
* elfnn-riscv.c (riscv_merge_std_ext): Use strcasecmp to compare the
strings rather than characters.
riscv_merge_arch_attr_info): The callback function get_default_version
is only needed for assembler, so set it to NULL int the linker.
* elfxx-riscv.c (riscv_estimate_digit): Remove the static.
* elfxx-riscv.h: Updated.
gas * testsuite/gas/riscv/priv-reg-fail-read-only-01.s: Updated.
* config/tc-riscv.c (default_arch_with_ext, default_isa_spec):
Static variables which are used to set the ISA extensions. You can
use -march (or ELF build attributes) and -misa-spec to set them,
respectively.
(ext_version_hash): The hash table used to handle the extensions
with versions.
(init_ext_version_hash): Initialize the ext_version_hash according
to riscv_ext_version_table.
(riscv_get_default_ext_version): The callback function of
riscv_parse_subset_t. According to the choosed ISA spec,
get the default version for the specific extension.
(riscv_set_arch): Set the callback function.
(enum options, struct option md_longopts): Add new option -misa-spec.
(md_parse_option): Do not call riscv_set_arch for -march. We will
call it later in riscv_after_parse_args. Call riscv_get_isa_spec_class
to set default_isa_spec class.
(riscv_after_parse_args): Call init_ext_version_hash to initialize the
ext_version_hash, and then call riscv_set_arch to set the architecture
with versions according to default_arch_with_ext.
* testsuite/gas/riscv/attribute-02.d: Set 0p0 as default version for
x extensions.
* testsuite/gas/riscv/attribute-03.d: Likewise.
* testsuite/gas/riscv/attribute-09.d: New testcase. For i-ext, we
already set it's version to 2p1 by march, so no need to use the default
2p2 version. For m-ext, we do not set the version by -march and ELF arch
attribute, so set the default 2p0 to it. For zicsr, it is not defined in
ISA spec 2p2, so set 0p0 to it.
* testsuite/gas/riscv/attribute-10.d: New testcase. The version of
zicsr is 2p0 according to ISA spec 20191213.
* config/tc-riscv.c (DEFAULT_RISCV_ARCH_WITH_EXT)
(DEFAULT_RISCV_ISA_SPEC): Default configure option settings.
You can set them by configure options --with-arch and
--with-isa-spec, respectively.
(riscv_set_default_isa_spec): New function used to set the
default ISA spec.
(md_parse_option): Call riscv_set_default_isa_spec rather than
call riscv_get_isa_spec_class directly.
(riscv_after_parse_args): If the -isa-spec is not set, then we
set the default ISA spec according to DEFAULT_RISCV_ISA_SPEC by
calling riscv_set_default_isa_spec.
* testsuite/gas/riscv/attribute-01.d: Add -misa-spec=2.2, since
the --with-isa-spec may be set to different ISA spec.
* testsuite/gas/riscv/attribute-02.d: Likewise.
* testsuite/gas/riscv/attribute-03.d: Likewise.
* testsuite/gas/riscv/attribute-04.d: Likewise.
* testsuite/gas/riscv/attribute-05.d: Likewise.
* testsuite/gas/riscv/attribute-06.d: Likewise.
* testsuite/gas/riscv/attribute-07.d: Likewise.
* configure.ac: Add configure options, --with-arch and
--with-isa-spec.
* configure: Regenerated.
* config.in: Regenerated.
* config/tc-riscv.c (default_priv_spec): Static variable which is
used to check if the CSR is valid for the chosen privilege spec. You
can use -mpriv-spec to set it.
(enum reg_class): We now get the CSR address from csr_extra_hash rather
than reg_names_hash. Therefore, move RCLASS_CSR behind RCLASS_MAX.
(riscv_init_csr_hashes): Only need to initialize one hash table
csr_extra_hash.
(riscv_csr_class_check): Change the return type to void. Don't check
the ISA dependency if -mcsr-check isn't set.
(riscv_csr_version_check): New function. Check and find the CSR address
from csr_extra_hash, according to default_priv_spec. Report warning
for the invalid CSR if -mcsr-check is set.
(reg_csr_lookup_internal): Updated.
(reg_lookup_internal): Likewise.
(md_begin): Updated since DECLARE_CSR and DECLARE_CSR_ALIAS are changed.
(enum options, struct option md_longopts): Add new GAS option -mpriv-spec.
(md_parse_option): Call riscv_set_default_priv_version to set
default_priv_spec.
(riscv_after_parse_args): If -mpriv-spec isn't set, then set the default
privilege spec to the newest one.
(enum riscv_csr_class, struct riscv_csr_extra): Move them to
include/opcode/riscv.h.
* testsuite/gas/riscv/priv-reg-fail-fext.d: This test case just want
to check the ISA dependency for CSR, so fix the spec version by adding
-mpriv-spec=1.11.
* testsuite/gas/riscv/priv-reg-fail-fext.l: Likewise. There are some
version warnings for the test case.
* gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.d: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.l: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.d: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.l: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p9.d: New test case.
Check whether the CSR is valid when privilege version 1.9 is choosed.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p9.l: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p9p1.d: New test case.
Check whether the CSR is valid when privilege version 1.9.1 is choosed.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p9p1.l: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p10.d: New test case.
Check whether the CSR is valid when privilege version 1.10 is choosed.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p10.l: Likewise.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p11.d: New test case.
Check whether the CSR is valid when privilege version 1.11 is choosed.
* gas/testsuite/gas/riscv/priv-reg-fail-version-1p11.l: Likewise.
* config/tc-riscv.c (DEFAULT_RISCV_ISA_SPEC): Default configure option
setting. You can set it by configure option --with-priv-spec.
(riscv_set_default_priv_spec): New function used to set the default
privilege spec.
(md_parse_option): Call riscv_set_default_priv_spec rather than
call riscv_get_priv_spec_class directly.
(riscv_after_parse_args): If -mpriv-spec isn't set, then we set the
default privilege spec according to DEFAULT_RISCV_PRIV_SPEC by
calling riscv_set_default_priv_spec.
* testsuite/gas/riscv/csr-dw-regnums.d: Add -mpriv-spec=1.11, since
the --with-priv-spec may be set to different privilege spec.
* testsuite/gas/riscv/priv-reg.d: Likewise.
* configure.ac: Add configure option --with-priv-spec.
* configure: Regenerated.
* config.in: Regenerated.
* config/tc-riscv.c (explicit_attr): Rename explicit_arch_attr to
explicit_attr. Set it to TRUE if any ELF attribute is found.
(riscv_set_default_priv_spec): Try to set the default_priv_spec if
the priv attributes are set.
(md_assemble): Set the default_priv_spec according to the priv
attributes when we start to assemble instruction.
(riscv_write_out_attrs): Rename riscv_write_out_arch_attr to
riscv_write_out_attrs. Update the arch and priv attributes. If we
don't set the corresponding ELF attributes, then try to output the
default ones.
(riscv_set_public_attributes): If any ELF attribute or -march-attr
options is set (explicit_attr is TRUE), then call riscv_write_out_attrs
to update the arch and priv attributes.
(s_riscv_attribute): Make sure all arch and priv attributes are set
before any instruction.
* testsuite/gas/riscv/attribute-01.d: Update the priv attributes if any
ELF attribute or -march-attr is set. If the priv attributes are not
set, then try to update them by the default setting (-mpriv-spec or
--with-priv-spec).
* testsuite/gas/riscv/attribute-02.d: Likewise.
* testsuite/gas/riscv/attribute-03.d: Likewise.
* testsuite/gas/riscv/attribute-04.d: Likewise.
* testsuite/gas/riscv/attribute-06.d: Likewise.
* testsuite/gas/riscv/attribute-07.d: Likewise.
* testsuite/gas/riscv/attribute-08.d: Likewise.
* testsuite/gas/riscv/attribute-09.d: Likewise.
* testsuite/gas/riscv/attribute-10.d: Likewise.
* testsuite/gas/riscv/attribute-unknown.d: Likewise.
* testsuite/gas/riscv/attribute-05.d: Likewise. Also, the priv spec
set by priv attributes must be supported.
* testsuite/gas/riscv/attribute-05.s: Likewise.
* testsuite/gas/riscv/priv-reg-fail-version-1p9.d: Likewise. Updated
priv attributes according to the -mpriv-spec option.
* testsuite/gas/riscv/priv-reg-fail-version-1p9p1.d: Likewise.
* testsuite/gas/riscv/priv-reg-fail-version-1p10.d: Likewise.
* testsuite/gas/riscv/priv-reg-fail-version-1p11.d: Likewise.
* testsuite/gas/riscv/priv-reg.d: Removed.
* testsuite/gas/riscv/priv-reg-version-1p9.d: New test case. Dump the
CSR according to the priv spec 1.9.
* testsuite/gas/riscv/priv-reg-version-1p9p1.d: New test case. Dump the
CSR according to the priv spec 1.9.1.
* testsuite/gas/riscv/priv-reg-version-1p10.d: New test case. Dump the
CSR according to the priv spec 1.10.
* testsuite/gas/riscv/priv-reg-version-1p11.d: New test case. Dump the
CSR according to the priv spec 1.11.
* config/tc-riscv.c (md_show_usage): Add descriptions about
the new GAS options.
* doc/c-riscv.texi: Likewise.
|
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|---|---|---|
| .. | ||
| config | ||
| doc | ||
| po | ||
| testsuite | ||
| .gitignore | ||
| acinclude.m4 | ||
| aclocal.m4 | ||
| app.c | ||
| as.c | ||
| as.h | ||
| asintl.h | ||
| atof-generic.c | ||
| bignum.h | ||
| bit_fix.h | ||
| cgen.c | ||
| cgen.h | ||
| ChangeLog | ||
| ChangeLog-0001 | ||
| ChangeLog-0203 | ||
| ChangeLog-2004 | ||
| ChangeLog-2005 | ||
| ChangeLog-2006 | ||
| ChangeLog-2007 | ||
| ChangeLog-2008 | ||
| ChangeLog-2009 | ||
| ChangeLog-2010 | ||
| ChangeLog-2011 | ||
| ChangeLog-2012 | ||
| ChangeLog-2013 | ||
| ChangeLog-2014 | ||
| ChangeLog-2015 | ||
| ChangeLog-2016 | ||
| ChangeLog-2017 | ||
| ChangeLog-2018 | ||
| ChangeLog-2019 | ||
| ChangeLog-9295 | ||
| ChangeLog-9697 | ||
| ChangeLog-9899 | ||
| compress-debug.c | ||
| compress-debug.h | ||
| cond.c | ||
| config.in | ||
| configure | ||
| configure.ac | ||
| configure.com | ||
| configure.tgt | ||
| CONTRIBUTORS | ||
| COPYING | ||
| debug.c | ||
| dep-in.sed | ||
| depend.c | ||
| dw2gencfi.c | ||
| dw2gencfi.h | ||
| dwarf2dbg.c | ||
| dwarf2dbg.h | ||
| ecoff.c | ||
| ecoff.h | ||
| ehopt.c | ||
| emul-target.h | ||
| emul.h | ||
| expr.c | ||
| expr.h | ||
| flonum-copy.c | ||
| flonum-konst.c | ||
| flonum-mult.c | ||
| flonum.h | ||
| frags.c | ||
| frags.h | ||
| gdbinit.in | ||
| hash.c | ||
| hash.h | ||
| input-file.c | ||
| input-file.h | ||
| input-scrub.c | ||
| itbl-lex-wrapper.c | ||
| itbl-lex.h | ||
| itbl-lex.l | ||
| itbl-ops.c | ||
| itbl-ops.h | ||
| itbl-parse.y | ||
| listing.c | ||
| listing.h | ||
| literal.c | ||
| macro.c | ||
| macro.h | ||
| MAINTAINERS | ||
| Makefile.am | ||
| Makefile.in | ||
| makefile.vms | ||
| messages.c | ||
| NEWS | ||
| obj.h | ||
| output-file.c | ||
| output-file.h | ||
| read.c | ||
| read.h | ||
| README | ||
| remap.c | ||
| sb.c | ||
| sb.h | ||
| stabs.c | ||
| stamp-h.in | ||
| subsegs.c | ||
| subsegs.h | ||
| symbols.c | ||
| symbols.h | ||
| tc.h | ||
| write.c | ||
| write.h | ||
README for GAS
A number of things have changed since version 1 and the wonderful
world of gas looks very different. There's still a lot of irrelevant
garbage lying around that will be cleaned up in time. Documentation
is scarce, as are logs of the changes made since the last gas release.
My apologies, and I'll try to get something useful.
Unpacking and Installation - Summary
====================================
See ../binutils/README.
To build just the assembler, make the target all-gas.
Documentation
=============
The GAS release includes texinfo source for its manual, which can be processed
into `info' or `dvi' forms.
The DVI form is suitable for printing or displaying; the commands for doing
this vary from system to system. On many systems, `lpr -d' will print a DVI
file. On others, you may need to run a program such as `dvips' to convert the
DVI file into a form your system can print.
If you wish to build the DVI file, you will need to have TeX installed on your
system. You can rebuild it by typing:
cd gas/doc
make as.dvi
The Info form is viewable with the GNU Emacs `info' subsystem, or the
stand-alone `info' program, available as part of the GNU Texinfo distribution.
To build the info files, you will need the `makeinfo' program. Type:
cd gas/doc
make info
Specifying names for hosts and targets
======================================
The specifications used for hosts and targets in the `configure'
script are based on a three-part naming scheme, but some short
predefined aliases are also supported. The full naming scheme encodes
three pieces of information in the following pattern:
ARCHITECTURE-VENDOR-OS
For example, you can use the alias `sun4' as a HOST argument or in a
`--target=TARGET' option. The equivalent full name is
`sparc-sun-sunos4'.
The `configure' script accompanying GAS does not provide any query
facility to list all supported host and target names or aliases.
`configure' calls the Bourne shell script `config.sub' to map
abbreviations to full names; you can read the script, if you wish, or
you can use it to test your guesses on abbreviations--for example:
% sh config.sub i386v
i386-unknown-sysv
% sh config.sub i786v
Invalid configuration `i786v': machine `i786v' not recognized
`configure' options
===================
Here is a summary of the `configure' options and arguments that are
most often useful for building GAS. `configure' also has several other
options not listed here.
configure [--help]
[--prefix=DIR]
[--srcdir=PATH]
[--host=HOST]
[--target=TARGET]
[--with-OPTION]
[--enable-OPTION]
You may introduce options with a single `-' rather than `--' if you
prefer; but you may abbreviate option names if you use `--'.
`--help'
Print a summary of the options to `configure', and exit.
`-prefix=DIR'
Configure the source to install programs and files under directory
`DIR'.
`--srcdir=PATH'
Look for the package's source code in directory DIR. Usually
`configure' can determine that directory automatically.
`--host=HOST'
Configure GAS to run on the specified HOST. Normally the
configure script can figure this out automatically.
There is no convenient way to generate a list of all available
hosts.
`--target=TARGET'
Configure GAS for cross-assembling programs for the specified
TARGET. Without this option, GAS is configured to assemble .o files
that run on the same machine (HOST) as GAS itself.
There is no convenient way to generate a list of all available
targets.
`--enable-OPTION'
These flags tell the program or library being configured to
configure itself differently from the default for the specified
host/target combination. See below for a list of `--enable'
options recognized in the gas distribution.
`configure' accepts other options, for compatibility with configuring
other GNU tools recursively; but these are the only options that affect
GAS or its supporting libraries.
The `--enable' options recognized by software in the gas distribution are:
`--enable-targets=...'
This causes one or more specified configurations to be added to those for
which BFD support is compiled. Currently gas cannot use any format other
than its compiled-in default, so this option is not very useful.
`--enable-bfd-assembler'
This causes the assembler to use the new code being merged into it to use
BFD data structures internally, and use BFD for writing object files.
For most targets, this isn't supported yet. For most targets where it has
been done, it's already the default. So generally you won't need to use
this option.
Compiler Support Hacks
======================
On a few targets, the assembler has been modified to support a feature
that is potentially useful when assembling compiler output, but which
may confuse assembly language programmers. If assembler encounters a
.word pseudo-op of the form symbol1-symbol2 (the difference of two
symbols), and the difference of those two symbols will not fit in 16
bits, the assembler will create a branch around a long jump to
symbol1, and insert this into the output directly before the next
label: The .word will (instead of containing garbage, or giving an
error message) contain (the address of the long jump)-symbol2. This
allows the assembler to assemble jump tables that jump to locations
very far away into code that works properly. If the next label is
more than 32K away from the .word, you lose (silently); RMS claims
this will never happen. If the -K option is given, you will get a
warning message when this happens.
REPORTING BUGS IN GAS
=====================
Bugs in gas should be reported to:
bug-binutils@gnu.org.
They may be cross-posted to gcc-bugs@gnu.org if they affect the use of
gas with gcc. They should not be reported just to gcc-bugs, since not
all of the maintainers read that list.
See ../binutils/README for what we need in a bug report.
Copyright (C) 2012-2020 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.