sys-devel/gdb: backport DW_LLE_start_end fix (for riscv64)

Reported-by: Marek Szuba
Closes: https://bugs.gentoo.org/805215
Bug: https://sourceware.org/PR27999
Package-Manager: Portage-3.0.20, Repoman-3.0.3
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

2 files changed, 302 insertions, 0 deletions

diff --git a/sys-devel/gdb/files/gdb-10.2-DW_LLE-riscv64.patch b/sys-devel/gdb/files/gdb-10.2-DW_LLE-riscv64.patch
new file mode 100644
index 000000000000..0d3e8c5cb949
--- /dev/null
+++ b/sys-devel/gdb/files/gdb-10.2-DW_LLE-riscv64.patch
@@ -0,0 +1,41 @@
+https://sourceware.org/git/?p=binutils-gdb.git;a=patch;h=80d1206d7fea6eb756183e2825abdfd0f00cd976
+https://sourceware.org/PR27999
+
+From 80d1206d7fea6eb756183e2825abdfd0f00cd976 Mon Sep 17 00:00:00 2001
+From: Andreas Schwab <schwab@suse.de>
+Date: Mon, 21 Jun 2021 11:38:23 +0200
+Subject: [PATCH] gdb: Support DW_LLE_start_end
+
+Without that it is impossible to debug on riscv64.
+
+--- a/gdb/dwarf2/loc.c
++++ b/gdb/dwarf2/loc.c
+@@ -255,9 +255,27 @@ decode_debug_loclists_addresses (dwarf2_per_cu_data *per_cu,
+       *new_ptr = loc_ptr;
+       return DEBUG_LOC_OFFSET_PAIR;
+ 
++    case DW_LLE_start_end:
++      if (loc_ptr + 2 * addr_size > buf_end)
++	return DEBUG_LOC_BUFFER_OVERFLOW;
++
++      if (signed_addr_p)
++	*low = extract_signed_integer (loc_ptr, addr_size, byte_order);
++      else
++	*low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
++
++      loc_ptr += addr_size;
++      if (signed_addr_p)
++	*high = extract_signed_integer (loc_ptr, addr_size, byte_order);
++      else
++	*high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
++
++      loc_ptr += addr_size;
++      *new_ptr = loc_ptr;
++      return DEBUG_LOC_START_END;
++
+     /* Following cases are not supported yet.  */
+     case DW_LLE_startx_endx:
+-    case DW_LLE_start_end:
+     case DW_LLE_default_location:
+     default:
+       return DEBUG_LOC_INVALID_ENTRY;
diff --git a/sys-devel/gdb/gdb-10.2-r1.ebuild b/sys-devel/gdb/gdb-10.2-r1.ebuild
new file mode 100644
index 000000000000..b5d5204d0458
--- /dev/null
+++ b/sys-devel/gdb/gdb-10.2-r1.ebuild
@@ -0,0 +1,261 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+PYTHON_COMPAT=( python3_{7,8,9,10} )
+
+inherit eutils flag-o-matic python-single-r1 toolchain-funcs
+
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} == ${CHOST} ]] ; then
+	if [[ ${CATEGORY} == cross-* ]] ; then
+		export CTARGET=${CATEGORY#cross-}
+	fi
+fi
+is_cross() { [[ ${CHOST} != ${CTARGET} ]] ; }
+
+case ${PV} in
+9999*)
+	# live git tree
+	EGIT_REPO_URI="https://sourceware.org/git/binutils-gdb.git"
+	inherit git-r3
+	SRC_URI=""
+	;;
+*.*.50.2???????)
+	# weekly snapshots
+	SRC_URI="ftp://sourceware.org/pub/gdb/snapshots/current/gdb-weekly-${PV}.tar.xz"
+	;;
+*)
+	# Normal upstream release
+	SRC_URI="mirror://gnu/gdb/${P}.tar.xz
+		ftp://sourceware.org/pub/gdb/releases/${P}.tar.xz"
+	;;
+esac
+
+PATCH_VER=""
+PATCH_DEV=""
+DESCRIPTION="GNU debugger"
+HOMEPAGE="https://sourceware.org/gdb/"
+SRC_URI="${SRC_URI}
+	${PATCH_DEV:+https://dev.gentoo.org/~${PATCH_DEV}/distfiles/${P}-patches-${PATCH_VER}.tar.xz}
+	${PATCH_VER:+mirror://gentoo/${P}-patches-${PATCH_VER}.tar.xz}
+"
+
+LICENSE="GPL-2 LGPL-2"
+SLOT="0"
+if [[ ${PV} != 9999* ]] ; then
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~x64-cygwin ~amd64-linux ~x86-linux ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+fi
+IUSE="cet lzma multitarget nls +python +server source-highlight test vanilla xml xxhash"
+REQUIRED_USE="
+	python? ( ${PYTHON_REQUIRED_USE} )
+"
+
+# ia64 kernel crashes when gdb testsuite is running
+RESTRICT="
+	ia64? ( test )
+
+	!test? ( test )
+"
+
+RDEPEND="
+	dev-libs/mpfr:0=
+	>=sys-libs/ncurses-5.2-r2:0=
+	>=sys-libs/readline-7:0=
+	sys-libs/zlib
+	lzma? ( app-arch/xz-utils )
+	python? ( ${PYTHON_DEPS} )
+	xml? ( dev-libs/expat )
+	source-highlight? (
+		dev-util/source-highlight
+	)
+	xxhash? (
+		dev-libs/xxhash
+	)
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	app-arch/xz-utils
+	sys-apps/texinfo
+	virtual/yacc
+	nls? ( sys-devel/gettext )
+	source-highlight? ( virtual/pkgconfig )
+	test? ( dev-util/dejagnu )
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-8.3.1-verbose-build.patch
+	"${FILESDIR}"/${PN}-10.1-cet.patch
+	"${FILESDIR}"/${PN}-10.2-sparc-nat.patch
+	"${FILESDIR}"/${PN}-10.2-DW_LLE-riscv64.patch
+)
+
+pkg_setup() {
+	use python && python-single-r1_pkg_setup
+}
+
+src_prepare() {
+	default
+
+	strip-linguas -u bfd/po opcodes/po
+	export CC_FOR_BUILD=$(tc-getBUILD_CC)
+
+	# avoid using ancient termcap from host on Prefix systems
+	sed -i -e 's/termcap tinfow/tinfow/g' \
+		gdb/configure{.ac,} || die
+}
+
+gdb_branding() {
+	printf "Gentoo ${PV} "
+	if ! use vanilla && [[ -n ${PATCH_VER} ]] ; then
+		printf "p${PATCH_VER}"
+	else
+		printf "vanilla"
+	fi
+	[[ -n ${EGIT_COMMIT} ]] && printf " ${EGIT_COMMIT}"
+}
+
+src_configure() {
+	strip-unsupported-flags
+
+	local myconf=(
+		# portage's econf() does not detect presence of --d-d-t
+		# because it greps only top-level ./configure. But not
+		# gnulib's or gdb's configure.
+		--disable-dependency-tracking
+
+		--with-pkgversion="$(gdb_branding)"
+		--with-bugurl='https://bugs.gentoo.org/'
+		--disable-werror
+		# Disable modules that are in a combined binutils/gdb tree. #490566
+		--disable-{binutils,etc,gas,gold,gprof,ld}
+
+		# avoid automagic dependency on (currently prefix) systems
+		# systems with debuginfod library, bug #754753
+		--without-debuginfod
+
+		# Allow user to opt into CET for host libraries.
+		# Ideally we would like automagic-or-disabled here.
+		# But the check does not quite work on i686: bug #760926.
+		$(use_enable cet)
+	)
+	local sysroot="${EPREFIX}/usr/${CTARGET}"
+	is_cross && myconf+=(
+		--with-sysroot="${sysroot}"
+		--includedir="${sysroot}/usr/include"
+		--with-gdb-datadir="\${datadir}/gdb/${CTARGET}"
+	)
+
+	# gdbserver only works for native targets (CHOST==CTARGET).
+	# it also doesn't support all targets, so rather than duplicate
+	# the target list (which changes between versions), use the
+	# "auto" value when things are turned on, which is triggered
+	# whenever no --enable or --disable is given
+	if is_cross || use !server ; then
+		myconf+=( --disable-gdbserver )
+	fi
+
+	myconf+=(
+		--enable-64-bit-bfd
+		--disable-install-libbfd
+		--disable-install-libiberty
+		# Disable guile for now as it requires guile-2.x #562902
+		--without-guile
+		--enable-obsolete
+		# This only disables building in the readline subdir.
+		# For gdb itself, it'll use the system version.
+		--disable-readline
+		--with-system-readline
+		# This only disables building in the zlib subdir.
+		# For gdb itself, it'll use the system version.
+		--without-zlib
+		--with-system-zlib
+		--with-separate-debug-dir="${EPREFIX}"/usr/lib/debug
+		$(use_with xml expat)
+		$(use_with lzma)
+		$(use_enable nls)
+		$(use_enable source-highlight)
+		$(use multitarget && echo --enable-targets=all)
+		$(use_with python python "${EPYTHON}")
+		$(use_with xxhash)
+	)
+	if use sparc-solaris || use x86-solaris ; then
+		# disable largefile support
+		# https://sourceware.org/ml/gdb-patches/2014-12/msg00058.html
+		myconf+=( --disable-largefile )
+	fi
+
+	# source-highlight is detected with pkg-config: bug #716558
+	export ac_cv_path_pkg_config_prog_path="$(tc-getPKG_CONFIG)"
+
+	econf "${myconf[@]}"
+}
+
+src_install() {
+	default
+	find "${ED}"/usr -name libiberty.a -delete || die
+
+	# Delete translations that conflict with binutils-libs. #528088
+	# Note: Should figure out how to store these in an internal gdb dir.
+	if use nls ; then
+		find "${ED}" \
+			-regextype posix-extended -regex '.*/(bfd|opcodes)[.]g?mo$' \
+			-delete || die
+	fi
+
+	# Don't install docs when building a cross-gdb
+	if [[ ${CTARGET} != ${CHOST} ]] ; then
+		rm -rf "${ED}"/usr/share/{doc,info,locale} || die
+		local f
+		for f in "${ED}"/usr/share/man/*/* ; do
+			if [[ ${f##*/} != ${CTARGET}-* ]] ; then
+				mv "${f}" "${f%/*}/${CTARGET}-${f##*/}" || die
+			fi
+		done
+		return 0
+	fi
+	# Install it by hand for now:
+	# https://sourceware.org/ml/gdb-patches/2011-12/msg00915.html
+	# Only install if it exists due to the twisted behavior (see
+	# notes in src_configure above).
+	[[ -e gdbserver/gdbreplay ]] && dobin gdbserver/gdbreplay
+
+	docinto gdb
+	dodoc gdb/CONTRIBUTE gdb/README gdb/MAINTAINERS \
+		gdb/NEWS gdb/ChangeLog gdb/PROBLEMS
+	docinto sim
+	dodoc sim/{ChangeLog,MAINTAINERS,README-HACKING}
+	if use server ; then
+		docinto gdbserver
+		dodoc gdbserver/{ChangeLog,README}
+	fi
+
+	if [[ -n ${PATCH_VER} ]] ; then
+		dodoc "${WORKDIR}"/extra/gdbinit.sample
+	fi
+
+	# Remove shared info pages
+	rm -f "${ED}"/usr/share/info/{annotate,bfd,configure,standards}.info*
+
+	# gcore is part of ubin on freebsd
+	if [[ ${CHOST} == *-freebsd* ]]; then
+		rm "${ED}"/usr/bin/gcore || die
+	fi
+
+	if use python; then
+		python_optimize "${ED}"/usr/share/gdb/python/gdb
+	fi
+}
+
+pkg_postinst() {
+	# portage sucks and doesnt unmerge files in /etc
+	rm -vf "${EROOT}"/etc/skel/.gdbinit
+
+	if use prefix && [[ ${CHOST} == *-darwin* ]] ; then
+		ewarn "gdb is unable to get a mach task port when installed by Prefix"
+		ewarn "Portage, unprivileged.  To make gdb fully functional you'll"
+		ewarn "have to perform the following steps:"
+		ewarn "  % sudo chgrp procmod ${EPREFIX}/usr/bin/gdb"
+		ewarn "  % sudo chmod g+s ${EPREFIX}/usr/bin/gdb"
+	fi
+}