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June 29th, 2018 Toolchain Release

This release updates the toolchain to the latest upstream releases,
including binutils-2.30, gcc-8.1, and newlib-3.0.0.  We're still using
the pre-upstream GDB and glibc ports.

December 31st Toolchain Release

It's been another month since the last toolchain release.  The changes
are fairly minor

* binutils-gdb is still based on the 2.29 upstream release, with the
following patches:

    * 248124ac2e57 RISC-V: Add missing privileged spec registers.
    * bee792f83a2a RISC-V: Add compressed instruction hints, and a few misc cleanups.
    * 7d895b6f4c12 Add missing RISC-V fsrmi and fsflagsi instructions.
    * 04d33e4a830b Objcopy interleave fails if section address not multiple of interleave.
    * 71a8fbb5aac3 Really fix riscv shared library __global_pointer$ problem.
    * 355497b4a723 Riscv shared libraries should not export __global_pointer$.
    * bfd4dc4363f4 Fix for texinfo 4.8.
    * caf839a4a41c Update and clean up RISC-V gas documentation.
    * df726395c987 Give Palmer co-credit for last patch.
    * 0362ab46dbe8 Fix riscv malloc error on small alignment after norvc.
    * 3adcc16f76e7 Merge pull request #126 from riscv/native-gdb
    * be4ba4074927 Make native gdb builds work.
    * 9b4d67248adb Merge pull request #122 from riscv/xml_registers
    * 58906a3ec0ad Remove redundant line.
    * 3a1de2c44f19 Don't need to track whether registers exist
    * c8f6c1bfeb6b Use gdbarch_ functions in case tdesc regs are used
    * 7d27e5408d3b Revert "Set target_desc in gdbarch_from_bfd()."
    * c6d3ad114dac Add helpful gdbarch comment
    * 0f5fee56333c Remove debug printfs.
    * de407c19e2c4 Set target_desc in gdbarch_from_bfd().
    * 6b51d01bf018 Better handling of target description.
    * 12a42bd967c8 Copy helpful comment from arm-tdep.
    * b69b760d69ea Merge pull request #116 from kito-cheng/riscv-sim
    * cdc668285a26 Merge pull request #115 from timsifive/xml_registers
    * 52cca9ebe393 Incorporate review feedback.
    * c6a5890f348e Compress loads/stores with implicit 0 offset.
    * 8481854f09fa Add support for the new names of the RISC-V fmv.x.s and fmv.s.x instructions, vis: fmv.x.w and fmv.w.x.
    * 396a0b13f8c9 Fix indention for TRACE_*
    * 80b28ad794ed Initialize end of brk to `_end` if possible
    * 9e22d669c3ce (sim) Return len even when modifying register ZERO.
    * 4229a5cce640 (sim) Add missing header
    * 1b223852172e (sim) Refine TARCE_INSN
    * 93ac92cd1209 Improve trace info for conditional branch
    * e62fa13662b0 Fix typo.
    * ae4c68f5dda0 Check brk if address is exceed DEFAULT_MEM_SIZE
    * 91bfc291c018 Change default size to 64M
    * 77a6f3bcbc7a Update cycleh and instreth at step_once
    * 66ea17cbfaf4 Implment csrrci, csrrsi and csrrwi
    * 5a79e80f4261 Support SYS_gettimeofday in gdb-sim.
    * 56be8b44c740 Add 'C' Compressed instructions for gdb simulator.
    * 5a60ae3657e2 (sim) Fix sbreak instruction.
    * ae36236bdd5e Fall back to use sim_syscall if we don't handle this syscall
    * 4fba6337cee8 Support SYS_brk in gdb-sim.
    * b5090c58bbbe Support SYS_link syscall in gdb-sim.
    * 5d87b1609050 First part of fix for riscv gas lns-common-1 failure.
    * b0ab42d9b0ea Add modified file I missed in last commit.
    * a8b34ad85ba6 Fix riscv ld testsuite failure for compressed1d.
    * 85ec95119d1d Fix riscv binutils xfail for debug_ranges test.
    * 6c510ac1e2de Fix typo in my email address.
    * 649a286a89e9 RISC-V: Fix riscv g++ testsuite EH failures.
    * 58e92db90d13 RISC-V: Add satp as an alias for sptbr
    * 6ac2ef3a3320 testsuite/ld-riscv-elf/ld-riscv-elf.exp: Fix typo for istarget.
    * 6e21f0139437 RISC-V: Add Jim Wilson as a maintainer, and clean up our entries
    * d42bfeceb523 Delete tconfig.h
    * 437ee82eeb54 Add 'D' double-precision instructions and 'F' single-precision instructions for gdb simulator
    * 08c5702eef14 Fix store or fetch correct fpr number.
    * c35211bb03c5 Initail stack pointer to 16byte aligned in both RV32 & RV64.
    * 2fdbbd7d12ab Fix atomic operation
    * fb4ba8f3bfc2 Use map to find registers instead of iterating.
    * d76b3d5a1d85 Remove unused field.
    * cd3e919468dd Only save/restore FP regs if they exist.
    * fee8ac5b2712 Add save/restore groups back.
    * e38628e067b3 Rebase cleanup.
    * 4f3bd83cd9e6 WIP on talking to servers that don't provide XML
    * c109cb7902a3 Checkpoint. XML registers pass spike32 tests.
    * 738db120fd4c Merge pull request #111 from riscv/register_names
    * 3ce8c2e6ae4a Merge pull request #112 from riscv/pseudo_registers
    * d0176cb1653b RISC-V: Fix riscv g++ testsuite EH failures.
    * d5feabfac32f RISC-V: Add satp as an alias for sptbr
    * 2f9782d95416 (WIP SIM): Fix jal and jalr
    * 13f665f5698d s0 is the preferred alias for x8.
    * d97ccfcb2112 We don't implement any pseudoregisters.
    * b11aca7dfa08 Use ABI names for registers.
    * f64577d1c916 RISC-V: Fix disassembly of c.addi4spn, c.addi16sp, c.lui when imm=0
    * d51d92c4d06b RISC-V: Only relax to C.LUI when imm != 0 and rd != 0/2
    * 3593f7f30f80 Fix my previous gas/ChangeLog entry
    * 164a62116dc9 RISC-V: Don't emit 2-byte NOPs if the C extension is disabled
    * 915b00e356e0 RISC-V: Relax RISCV_PCREL_* to RISCV_GPREL_*
    * fa753df2d560 RISC-V: Add R_RISCV_DELETE, which marks bytes for deletion
    * 9eb250cb914c RISC-V: Mark unsupported gas testcases
    * 0d96fbb3095f riscv: Cache the max alignment of output sections
    * 60cda8de81dc RISC-V: Avoid emitting invalid instructions in mixed RVC/no-RVC code
    * 296c682e9d92 RISC-V: Print an error when unable to align a section
    * 1bfb4ecbd84c RISC-V: Support PCREL_* relocations agaist weak undefined symbols
    * d3fae8db583d Improve handling of ADD and SUB relocations on the RISCV target.
    * 404de0666a6a RISC-V: Mark "c.nop" as an alias
    * dfbf9e44a0e1 Fix problems parsing RISCV architecture extenstions in the assembler.
    * 697d5b8ee280 (RISC-V GDB) Only save FPRs on harts that support F/D/Q
    * 495d737e62c0 (RISC-V GDB) GDB update
    * c950de297cd7 (RISC-V GDB) RISC-V GDB Port

* GCC has not changed, it's still based on the 7.2.0 upstream release
with the following changes

    * b731149757b9 ("RISC-V: Implement movmemsi")
    * 605bc7b5e06a ("RISC-V: Define MUSL_DYNAMIC_LINKER")
    * 2423096b0696 ("RISC-V: Emit "i" suffix for instructions with immediate operands")
    * 327d99b09bc0 ("RISC-V: If -m[no-]strict-align is not passed, assume its value from -mtune")
    * f34a83e82258 ("RISC-V: Set SLOW_BYTE_ACCESS=1")
    * 7dde69e2c5f7 ("RISC-V: Handle non-legitimate address in riscv_legitimize_move")
    * 1751fbe7b9e8 ("RISC-V: Use "@minus{}2 GB" instead of "-2 GB" in invoke.texi")
    * 6d1f1f891869 ("RISC-V: Document the medlow and medany code models")
    * d2d1f783b2c1 ("RISC-V: Correct and improve the "-mabi" documentation")
    * d13dd0242604 ("RISC-V: Add Sign/Zero extend patterns for PIC loads")
    * 341375637a7d ("RISC-V: Add -mstrict-align option")
    * f47f9c2b3b90 ("RISC-V: Unify indention in riscv.md")
    * 1bd23ca8c30f ("Update ChangeLog and version files for release")

November 7th 2017 Toolchain Release

It's been about two months since the last stable toolchain release, so
we're a bit past due for a new one.  Here's a summary of the changes
in this release

* binutils-gdb is still based on the 2.29 upstream release, with the
following patches:
    * d0176cb1653b ("RISC-V: Fix riscv g++ testsuite EH failures.")
    * d5feabfac32f ("RISC-V: Add satp as an alias for sptbr")
    * 2f9782d95416 ("(WIP SIM): Fix jal and jalr")
    * f64577d1c916 ("RISC-V: Fix disassembly of c.addi4spn, c.addi16sp, c.lui when imm=0")
    * d51d92c4d06b ("RISC-V: Only relax to C.LUI when imm != 0 and rd != 0/2")
    * 3593f7f30f80 ("Fix my previous gas/ChangeLog entry")
    * 164a62116dc9 ("RISC-V: Don't emit 2-byte NOPs if the C extension is disabled")
    * 915b00e356e0 ("RISC-V: Relax RISCV_PCREL_* to RISCV_GPREL_*")
    * fa753df2d560 ("RISC-V: Add R_RISCV_DELETE, which marks bytes for deletion")
    * 9eb250cb914c ("RISC-V: Mark unsupported gas testcases")
    * 0d96fbb3095f ("riscv: Cache the max alignment of output sections")
    * 60cda8de81dc ("RISC-V: Avoid emitting invalid instructions in mixed RVC/no-RVC code")
    * 296c682e9d92 ("RISC-V: Print an error when unable to align a section")
    * 1bfb4ecbd84c ("RISC-V: Support PCREL_* relocations agaist weak undefined symbols")
    * d3fae8db583d ("Improve handling of ADD and SUB relocations on the RISCV target.")
    * 404de0666a6a ("RISC-V: Mark "c.nop" as an alias")
    * dfbf9e44a0e1 ("Fix problems parsing RISCV architecture extenstions in the assembler.")
    * 697d5b8ee280 ("(RISC-V GDB) Only save FPRs on harts that support F/D/Q")
    * 495d737e62c0 ("(RISC-V GDB) GDB update")
    * c950de297cd7 ("(RISC-V GDB) RISC-V GDB Port")
    * dd9a28c0966d ("Bump version to 2.29")
* GCC is now based on the 7.2.0 upstream release, with the following
patches
    * b731149757b9 ("RISC-V: Implement movmemsi")
    * 605bc7b5e06a ("RISC-V: Define MUSL_DYNAMIC_LINKER")
    * 2423096b0696 ("RISC-V: Emit "i" suffix for instructions with immediate operands")
    * 327d99b09bc0 ("RISC-V: If -m[no-]strict-align is not passed, assume its value from -mtune")
    * f34a83e82258 ("RISC-V: Set SLOW_BYTE_ACCESS=1")
    * 7dde69e2c5f7 ("RISC-V: Handle non-legitimate address in riscv_legitimize_move")
    * 1751fbe7b9e8 ("RISC-V: Use "@minus{}2 GB" instead of "-2 GB" in invoke.texi")
    * 6d1f1f891869 ("RISC-V: Document the medlow and medany code models")
    * d2d1f783b2c1 ("RISC-V: Correct and improve the "-mabi" documentation")
    * d13dd0242604 ("RISC-V: Add Sign/Zero extend patterns for PIC loads")
    * 341375637a7d ("RISC-V: Add -mstrict-align option")
    * f47f9c2b3b90 ("RISC-V: Unify indention in riscv.md")
    * 1bd23ca8c30f ("Update ChangeLog and version files for release")

June 12th 2017 Toolchain Release

It's been a month since the last stable toolchain release, which seems like a
good time for another one. Here's the changes since the last release:

binutils
* GP-relative disassembly hints are working again.
* 32-bit BFDs can handle 64-bit objects.
* c.li, c.andi, and c.addiw disassembly correctly.

gcc
* A new "-mstrict-align" option is availiable, which enforces strict
  alignment. Without this argument the compiler assumes unaligned operations
  are slow instead of assuming they're illegal. This is meant to be used in
  machine-mode code on platforms that don't support unaligned accesses.
* Sub-XLEN PIC loads now extend correctly.
* An internal compiler error related to sub-word moves has been fixed.
  glibc
* The initial GP generation cannot be relaxed.

newlib
* We are using a version based on 2.5.

riscv-gnu-toolchain
* The prerequisite libraries are downloaded correctly again.
* There is a "--with-guile" flag

May 3rd 2017 Toolchain Release

As you may have noticed, we recently had an upstream release of GCC that
contains RISC-V support. Since we're now upstream in binutils and GCC it seems
like a good time to start tagging releases of riscv-gnu-toolchain as stable.
I've tagged the current release on github. Since this is a sort of meta-repo,
I thought the best versioning scheme would just be the current date, so that's
what I'm going with.

I'll try to regularly tag stable releases of the toolchain. I'm going to just
play it by ear as to how frequently I release these, but I anticipate it being
between weekly and monthly. All these tagged release will have passed the
various test suites we run, and I'll write a change log on all the future
releases so users don't have to track commits.

Note that just because we've tagged a release doesn't mean things are stable:
glibc and Linux still aren't upstream so their ABIs aren't set in stone yet
(though we hope not to have to change them). I'm checking the "This is a
pre-release" button on GitHib due to possibility of ABI changes.

August 18th Toolchain Release

It's been about two months singe the last stable toolchain release, so
we're a bit past new on a new one.  Here's a summary of the changes
since the June release:

binutils/gdb:
* Now based on the 2.29 upstream release.
* 5852e73c72db RISC-V: Support PCREL_* relocations agaist weak
  undefined symbols
* 0419befe6f92 (WIP) RISC-V: Provide better disassembly of alignment
  sequences
* 160ba91886e3 (WIP) objdump: Provide the found reloc to the disassembler
* 779cd1f46451 (WIP) RISC-V: Avoid emitting invalid instructions in mixed
  RVC/no-RVC code
* ceef952725fb (WIP) RISC-V: Print an error when unable to align a section

We're not including GCC 7.2 here as it's just a bit too new, so there
are no changes to our GCC port.