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This commit introduces basic support for baremetal RiscV as a GDB target. This target is currently only tested against the RiscV software simulator, which is not included as part of this commit. The target has been tested against the following RiscV variants: rv32im, rv32imc, rv32imf, rv32imfc, rv64im, rv64imc, rv64imfd, rv64imfdc. Across these variants we pass on average 34858 tests, and fail 272 tests, which is ~0.8%. The RiscV has a feature of its ABI where structures with a single floating point field, a single complex float field, or one float and one integer field are treated differently for argument passing. The new test gdb.base/infcall-nested-structs.exp is added to cover this feature. As passing these structures should work on all targets then I've made the test as a generic one, even though, for most targets, there's probably nothing special about any of these cases. gdb/ChangeLog: * Makefile.in (ALL_TARGET_OBS): Add riscv-tdep.o (HFILES_NO_SRCDIR): Add riscv-tdep.h. (ALLDEPFILES): Add riscv-tdep.c * configure.tgt: Add riscv support. * riscv-tdep.c: New file. * riscv-tdep.h: New file. * NEWS: Mention new target. * MAINTAINERS: Add entry for riscv. gdb/testsuite/ChangeLog: * gdb.base/infcall-nested-structs.exp: New file. * gdb.base/infcall-nested-structs.c: New file. * gdb.base/float.exp: Add riscv support.
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.