A second version of the GCC patch is attached. It has this problem:
https://gcc.gnu.org/ml/gcc/2018-05/msg00259.html
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.hu...@embedded-brains.de
PGP : Public key available on request.
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>From 8d2cb7a18eaf5f5e8519f70b2ac9e8eda6179152 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.hu...@embedded-brains.de>
Date: Mon, 28 May 2018 09:48:57 +0200
Subject: [PATCH] RISC-V: Add custom RTEMS multilibs
Remove 64-bit multilibs from riscv32-*-rtems* targets. Remove 32-bit
multilibs from riscv64-*-rtems* targets.
Default to -mcmodel=medany on the riscv64-*-rtems* targets. The
ratinale for this change is that several existing RISC-V chips map the
RAM at 0x80000000. In RTEMS, we do not use virtual memory, so
applications will run at this location which is outside the +-2GiB range
in a 64-bit configuration.
gcc/
* config.gcc (riscv*-*-elf* | riscv*-*-rtems*): Use custom
multilibs for riscv32-*-rtems* and riscv64-*-rtems*.
* config/riscv/rtems64.h: New file.
* config/riscv/t-rtems: Likewise.
* config/riscv/t-rtems64: Likewise.
---
gcc/config.gcc | 24 +++++++++++++++---------
gcc/config/riscv/rtems64.h | 34 ++++++++++++++++++++++++++++++++++
gcc/config/riscv/t-rtems | 16 ++++++++++++++++
gcc/config/riscv/t-rtems64 | 12 ++++++++++++
4 files changed, 77 insertions(+), 9 deletions(-)
create mode 100644 gcc/config/riscv/rtems64.h
create mode 100644 gcc/config/riscv/t-rtems
create mode 100644 gcc/config/riscv/t-rtems64
diff --git a/gcc/config.gcc b/gcc/config.gcc
index d73e2cbc99a..d8cebc6dd18 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -2075,10 +2075,21 @@ riscv*-*-linux*)
;;
riscv*-*-elf* | riscv*-*-rtems*)
tm_file="elfos.h newlib-stdint.h ${tm_file} riscv/elf.h"
- case "x${enable_multilib}" in
- xno) ;;
- xyes) tmake_file="${tmake_file} riscv/t-elf-multilib" ;;
- *) echo "Unknown value for enable_multilib"; exit 1
+ case ${target} in
+ riscv32-*-rtems*)
+ tm_file="${tm_file} rtems.h riscv/rtems.h"
+ tmake_file="${tmake_file} riscv/t-rtems"
+ ;;
+ riscv64-*-rtems*)
+ tm_file="${tm_file} rtems.h riscv/rtems64.h"
+ tmake_file="${tmake_file} riscv/t-rtems64"
+ ;;
+ *)
+ case "x${enable_multilib}" in
+ xno) ;;
+ xyes) tmake_file="${tmake_file} riscv/t-elf-multilib" ;;
+ *) echo "Unknown value for enable_multilib"; exit 1
+ esac
esac
tmake_file="${tmake_file} riscv/t-riscv"
gnu_ld=yes
@@ -2086,11 +2097,6 @@ riscv*-*-elf* | riscv*-*-rtems*)
# Force .init_array support. The configure script cannot always
# automatically detect that GAS supports it, yet we require it.
gcc_cv_initfini_array=yes
- case ${target} in
- riscv*-*-rtems*)
- tm_file="${tm_file} rtems.h riscv/rtems.h"
- ;;
- esac
;;
riscv*-*-freebsd*)
tm_file="${tm_file} elfos.h ${fbsd_tm_file} riscv/freebsd.h"
diff --git a/gcc/config/riscv/rtems64.h b/gcc/config/riscv/rtems64.h
new file mode 100644
index 00000000000..f6a9d8e44d8
--- /dev/null
+++ b/gcc/config/riscv/rtems64.h
@@ -0,0 +1,34 @@
+/* Definitions for RISC-V RTEMS systems with ELF format.
+ Copyright (C) 2017-2018 Free Software Foundation, Inc.
+
+ This file is part of GCC.
+
+ GCC is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GCC is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+ License for more details.
+
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
+
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS() \
+ do { \
+ builtin_define ("__rtems__"); \
+ builtin_define ("__USE_INIT_FINI__"); \
+ builtin_assert ("system=rtems"); \
+ } while (0)
+
+#undef TARGET_DEFAULT_CMODEL
+#define TARGET_DEFAULT_CMODEL CM_MEDANY
diff --git a/gcc/config/riscv/t-rtems b/gcc/config/riscv/t-rtems
new file mode 100644
index 00000000000..35703369823
--- /dev/null
+++ b/gcc/config/riscv/t-rtems
@@ -0,0 +1,16 @@
+MULTILIB_OPTIONS =
+MULTILIB_DIRNAMES =
+
+MULTILIB_OPTIONS += march=rv32i/march=rv32im/march=rv32imafd/march=rv32iac/march=rv32imac/march=rv32imafc
+MULTILIB_DIRNAMES += rv32i rv32im rv32imafd rv32iac rv32imac rv32imafc
+
+MULTILIB_OPTIONS += mabi=ilp32/mabi=ilp32f/mabi=ilp32d
+MULTILIB_DIRNAMES += ilp32 ilp32f ilp32d
+
+MULTILIB_REQUIRED =
+MULTILIB_REQUIRED += march=rv32i/mabi=ilp32
+MULTILIB_REQUIRED += march=rv32im/mabi=ilp32
+MULTILIB_REQUIRED += march=rv32imafd/mabi=ilp32d
+MULTILIB_REQUIRED += march=rv32iac/mabi=ilp32
+MULTILIB_REQUIRED += march=rv32imac/mabi=ilp32
+MULTILIB_REQUIRED += march=rv32imafc/mabi=ilp32f
diff --git a/gcc/config/riscv/t-rtems64 b/gcc/config/riscv/t-rtems64
new file mode 100644
index 00000000000..1d4e2b23464
--- /dev/null
+++ b/gcc/config/riscv/t-rtems64
@@ -0,0 +1,12 @@
+MULTILIB_OPTIONS =
+MULTILIB_DIRNAMES =
+
+MULTILIB_OPTIONS += march=rv64imafd/march=rv64imac
+MULTILIB_DIRNAMES += rv64imafd rv64imac
+
+MULTILIB_OPTIONS += mabi=lp64/mabi=lp64d
+MULTILIB_DIRNAMES += lp64 lp64d
+
+MULTILIB_REQUIRED =
+MULTILIB_REQUIRED += march=rv64imafd/mabi=lp64d
+MULTILIB_REQUIRED += march=rv64imac/mabi=lp64
--
2.13.6
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