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The original discussion is as follows, https://github.com/riscv/riscv-isa-manual/issues/637 I never considered the prefixes may have multiple letters, like zxm. But the ISA spec has been updated for a long time that I haven't noticed. This patch rewrites the part of architecture parser to support parsing the multi-letter prefixes. Besides, I also improve the parser to report errors in details. One of the most obvious improvement is - Do not parse the prefixed extensions according to the orders in the parse_config. If we do so, then we used to get "unexpected ISA string at end" errors, but the message is a little bit hard to know what is happening. I Remove the confused message, and let riscv_parse_prefixed_ext to report the details. bfd/ * elfxx-riscv.c (riscv_std_z_ext_strtab): Moved forward. (riscv_std_s_ext_strtab): Likewise. (riscv_std_h_ext_strtab): Likewise. (riscv_std_zxm_ext_strtab): Added for the zxm prefix. (enum riscv_prefix_ext_class): Moved forward and renamed from riscv_isa_ext_class. Reorder them according to the parsing order, since the enum values are used to check the orders in the riscv_compare_subsets. (struct riscv_parse_prefix_config): Moved forward and renamed from riscv_parse_config_t. Also removed the ext_valid_p field, the related functions are replaced by riscv_valid_prefixed_ext. (parse_config): Moved forward and updated. The more letters of the prefix string, the more forward it must be defined. Otherwise, we will get the wrong mapping when using strncmp in riscv_get_prefix_class. (riscv_get_prefix_class): Moved forward. Support to parse the multi-letter prefix, like zxm. (riscv_known_prefixed_ext): New function, check if the prefixed extension is supported according to the right riscv_std_*_ext_strtab. (riscv_valid_prefixed_ext): New function, used to replace the riscv_ext_*_valid_p functions. (riscv_init_ext_order): Do not set the values for prefix keywords since they may have multiple letters for now. (riscv_compare_subsets): Set the order values of prefix keywords to negative numbers according to the riscv_prefix_ext_class. (riscv_parse_std_ext): Call riscv_get_prefix_class to see if we have parsed the prefixed extensions. (riscv_parse_prefixed_ext): Updated and removed the parameter config. Report error when the prefix is unknown. (riscv_parse_subset): Do not parse the prefixed extensions according to the orders in the parse_config. Remove the confused message and let riscv_parse_prefixed_ext to report the details. * elfxx-riscv.h (enum riscv_isa_ext_class): Moved to elfxx-riscv.c. (riscv_get_prefix_class): Removed to static. gas/ * testsuite/gas/riscv/march-fail-order-x-std.d: Renamed from march-fail-porder-x-std.d. * testsuite/gas/riscv/march-fail-order-z-std.d: Renamed from march-fail-porder-z-std.d. * testsuite/gas/riscv/march-fail-order-x-z.d: Renamed from march-fail-porder-x-z.d. * testsuite/gas/riscv/march-fail-order-zx-std.l: Added to replace march-fail-porder.l. * testsuite/gas/riscv/march-fail-order-x-z.l: Likewise. * testsuite/gas/riscv/march-fail-order-x.l: Updated. * testsuite/gas/riscv/march-fail-order-z.l: Likewise. * testsuite/gas/riscv/march-fail-single-prefix-h.d: Renamed from march-fail-single-char-h.d. * testsuite/gas/riscv/march-fail-single-prefix-s.d: Renamed from march-fail-single-char-s.d. * testsuite/gas/riscv/march-fail-single-prefix-x.d: Renamed from march-fail-single-char-x.d. * testsuite/gas/riscv/march-fail-single-prefix-z.d: Renamed from march-fail-single-char-z.d. * testsuite/gas/riscv/march-fail-single-prefix-zmx.d: Added. * testsuite/gas/riscv/march-fail-single-prefix.l: Added to replace march-fail-single-prefix.l. * testsuite/gas/riscv/march-fail-unknown-zxm.d: Added. * testsuite/gas/riscv/march-fail-unknown-std.l: Updated. * testsuite/gas/riscv/march-fail-unknown.l: Likewise. |
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| ChangeLog | ||
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BFD is an object file library. It permits applications to use the
same routines to process object files regardless of their format.
BFD is used by the GNU debugger, assembler, linker, and the binary
utilities.
The documentation on using BFD is scanty and may be occasionally
incorrect. Pointers to documentation problems, or an entirely
rewritten manual, would be appreciated.
There is some BFD internals documentation in doc/bfdint.texi which may
help programmers who want to modify BFD.
BFD is normally built as part of another package. See the build
instructions for that package, probably in a README file in the
appropriate directory.
BFD supports the following configure options:
--target=TARGET
The default target for which to build the library. TARGET is
a configuration target triplet, such as sparc-sun-solaris.
--enable-targets=TARGET,TARGET,TARGET...
Additional targets the library should support. To include
support for all known targets, use --enable-targets=all.
--enable-64-bit-bfd
Include support for 64 bit targets. This is automatically
turned on if you explicitly request a 64 bit target, but not
for --enable-targets=all. This requires a compiler with a 64
bit integer type, such as gcc.
--enable-shared
Build BFD as a shared library.
--with-mmap
Use mmap when accessing files. This is faster on some hosts,
but slower on others. It may not work on all hosts.
Report bugs with BFD to bug-binutils@gnu.org.
Patches are encouraged. When sending patches, always send the output
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acceptable. Please also read the ``Reporting Bugs'' section of the
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Bug reports without patches will be remembered, but they may never get
fixed until somebody volunteers to fix them.
Copyright (C) 2012-2021 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.