libsigsegv: add RISC-V support
This commit backports an upstream commit adding RISC-V support to libsigsegv, and adds a patch that finalizes the RISC-V support to make it compatible with cross-compilation. Fixes: http://autobuild.buildroot.net/results/bd12cb3db3b46860a4ab8fb91052319dce75202a/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Tested-by: Mark Corbin <mark.corbin@embecosm.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni
Peter Korsgaard
parent
d65702b58a
commit
e2da2e1e69
@ -0,0 +1,79 @@
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From 4e6e6b52fe2f88584645a761bb342ac89d6c2860 Mon Sep 17 00:00:00 2001
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From: Bruno Haible <bruno@clisp.org>
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Date: Thu, 15 Mar 2018 19:01:27 +0100
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Subject: [PATCH] Improve support for Linux/RISC-V.
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[Thomas: backported from upstream commit
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671b2528b55c57eda1a8fe5872ff1ef61014235f, drop ChangeLog changes.]
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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---
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configure.ac | 3 +++
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src/Makefile.am | 1 +
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src/fault-linux-riscv64.h | 29 +++++++++++++++++++++++++++++
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3 files changed, 33 insertions(+)
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create mode 100644 src/fault-linux-riscv64.h
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diff --git a/configure.ac b/configure.ac
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index 74ce6b4..9775cfb 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -428,6 +428,9 @@ if test -z "$CFG_FAULT" && test "$sv_cv_fault_posix" = yes; then
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powerpc* | rs6000)
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CFG_FAULT=fault-linux-powerpc.h
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;;
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+ riscv64)
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+ CFG_FAULT=fault-linux-riscv64.h
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+ ;;
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s390*)
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CFG_FAULT=fault-linux-s390.h
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;;
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diff --git a/src/Makefile.am b/src/Makefile.am
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index 3afa398..9a9982f 100644
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--- a/src/Makefile.am
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+++ b/src/Makefile.am
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@@ -42,6 +42,7 @@ noinst_HEADERS = \
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fault-linux-m68k.h fault-linux-m68k-old.h fault-linux-m68k-old.c \
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fault-linux-mips.h fault-linux-mips-old.h \
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fault-linux-powerpc.h fault-linux-powerpc-old.h \
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+ fault-linux-riscv64.h \
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fault-linux-s390.h fault-linux-s390-old.h \
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fault-linux-sh.h fault-linux-sh-old.h \
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fault-linux-sparc.h fault-linux-sparc-old.h \
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diff --git a/src/fault-linux-riscv64.h b/src/fault-linux-riscv64.h
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new file mode 100644
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index 0000000..14831bf
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--- /dev/null
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+++ b/src/fault-linux-riscv64.h
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@@ -0,0 +1,29 @@
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+/* Fault handler information. Linux/RISC-V 64-bit version.
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+ Copyright (C) 2018 Bruno Haible <bruno@clisp.org>
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 2, or (at your option)
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+ any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program; if not, write to the Free Software Foundation,
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+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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+
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+#include "fault-posix-ucontext.h"
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+
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+/* See glibc/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h
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+ and the definition of GET_STACK in
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+ glibc/sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h.
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+ Note that the 'mcontext_t' defined in
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+ glibc/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h
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+ and the 'struct sigcontext' defined in
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+ glibc/sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h
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+ start with the same block of 32 general-purpose registers. */
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+
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+#define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *) ucp)->uc_mcontext.__gregs[REG_SP]
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--
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2.19.1
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@ -0,0 +1,35 @@
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From 9dd1989f5ae6cd3f2051732318e26bf742a4c89b Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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Date: Tue, 13 Nov 2018 22:24:03 +0100
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Subject: [PATCH] m4/stack-direction: RISC-V stack grows downward
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While commit 671b2528b55c57eda1a8fe5872ff1ef61014235f ("Improve
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support for Linux/RISC-V") adds some support for the RISC-V
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architecture, it doesn't update m4/stack-direction.m4 to properly
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support cross-compiling libsigsegv for a RISC-V architecture.
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According to
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https://riscv.org/wp-content/uploads/2015/01/riscv-calling.pdf: "In
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the standard RISC-V calling convention, the stack grows downward", so
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let's update m4/stack-direction.m4 accordingly.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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---
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m4/stack-direction.m4 | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/m4/stack-direction.m4 b/m4/stack-direction.m4
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index c373f1c..9504f88 100644
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--- a/m4/stack-direction.m4
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+++ b/m4/stack-direction.m4
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@@ -43,6 +43,7 @@ AC_DEFUN([SV_STACK_DIRECTION],
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pdp11 | \
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pj* | \
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powerpc* | rs6000 | \
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+ riscv* | \
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romp | \
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s390* | \
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sh* | \
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--
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2.19.1
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@ -10,5 +10,8 @@ LIBSIGSEGV_INSTALL_STAGING = YES
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LIBSIGSEGV_CONF_ENV = sv_cv_fault_posix=yes
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LIBSIGSEGV_LICENSE = GPL-2.0+
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LIBSIGSEGV_LICENSE_FILES = COPYING
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# 0001-Improve-support-for-Linux-RISC-V.patch
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# 0002-m4-stack-direction-RISC-V-stack-grows-downward.patch
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LIBSIGSEGV_AUTORECONF = YES
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$(eval $(autotools-package))
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