Fix RISC-V native Linux support to handle a 64-bit FPU (FLEN == 64) with both RV32 and RV64 systems, which is a part of the current Linux ABI for hard-float systems, rather than assuming that (FLEN == XLEN) in target description determination and that (FLEN == 64) in register access. We can do better however and not rely on any particular value of FLEN and probe for it dynamically, by observing that the PTRACE_GETREGSET ptrace(2) call will only accept an exact regset size, and that will reflect FLEN. Therefore iterate over the call in target description determination with a geometrically increasing regset size until a match is marked by a successful ptrace(2) call completion or we run beyond the maximum size we can support. Update register accessors accordingly, using FLEN determined to size the buffer used for NT_PRSTATUS requests and then to exchange data with the regcache. Also handle a glibc bug where ELF_NFPREG is defined in terms of NFPREG, however NFPREG is nowhere defined. gdb/ * riscv-linux-nat.c [!NFPREG] (NFPREG): New macro. (supply_fpregset_regnum, fill_fpregset): Handle regset buffer offsets according to FLEN determined. (riscv_linux_nat_target::read_description): Determine FLEN dynamically. (riscv_linux_nat_target::fetch_registers): Size regset buffer according to FLEN determined. (riscv_linux_nat_target::store_registers): Likewise. |
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| cpu | ||
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| etc | ||
| gas | ||
| gdb | ||
| gdbsupport | ||
| gnulib | ||
| gold | ||
| gprof | ||
| include | ||
| intl | ||
| ld | ||
| libctf | ||
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| opcodes | ||
| readline | ||
| sim | ||
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| ar-lib | ||
| ChangeLog | ||
| compile | ||
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| configure | ||
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| COPYING | ||
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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.