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-rw-r--r--meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch414
1 files changed, 0 insertions, 414 deletions
diff --git a/meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch b/meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch
deleted file mode 100644
index 31cf0b0be2..0000000000
--- a/meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch
+++ /dev/null
@@ -1,414 +0,0 @@
-From 32b366249fd42d74cbc4a91039431554ebadcfd0 Mon Sep 17 00:00:00 2001
-From: Anton Kolesov <anton.kolesov@synopsys.com>
-Date: Fri, 14 Feb 2014 11:56:23 +0400
-Subject: [PATCH 4/4] gdb: Add native support for ARC in GNU/Linux
-
-With this patch in place it is possible to build a GDB that
-can run on ARC (GNU/Linux) hosts for debugging ARC targets.
-
-The "arc-linux-nat.c" is a rather small one that mostly deals
-with registers and a few thread related hooks.
-
-v2 [1]:
-- Remove "void" from the input of "_initialize_arc_linux_nat ()"
-
-[1] Tom's remark after the first patch
-https://sourceware.org/pipermail/gdb-patches/2020-November/173223.html
-
-gdb/ChangeLog:
-
- * Makefile.in (ALLDEPFILES): Add arc-linux-nat.c.
- * configure.host (host to gdb names): Add arc*-*-linux*.
- * configure.nat (gdb_host_cpu): Add arc.
- * arc-linux-nat.c: New.
-
-Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=04c9f85efcd8df5fc482ce97c0104cc7dd5d19e6]
-
-Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
-Signed-off-by: Shahab Vahedi <shahab@synopsys.com>
-Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
----
- gdb/Makefile.in | 1 +
- gdb/arc-linux-nat.c | 320 ++++++++++++++++++++++++++++++++++++++++++++++++++++
- gdb/configure.host | 3 +
- gdb/configure.nat | 4 +
- 4 files changed, 328 insertions(+)
- create mode 100644 gdb/arc-linux-nat.c
-
-diff --git a/gdb/Makefile.in b/gdb/Makefile.in
-index ec371fc7e52..c76136907ae 100644
---- a/gdb/Makefile.in
-+++ b/gdb/Makefile.in
-@@ -2136,6 +2136,7 @@ ALLDEPFILES = \
- amd64-obsd-tdep.c \
- amd64-sol2-tdep.c \
- amd64-tdep.c \
-+ arc-linux-nat.c \
- arc-tdep.c \
- arm.c \
- arm-bsd-tdep.c \
-diff --git a/gdb/arc-linux-nat.c b/gdb/arc-linux-nat.c
-new file mode 100644
-index 00000000000..41301fd4fed
---- /dev/null
-+++ b/gdb/arc-linux-nat.c
-@@ -0,0 +1,320 @@
-+/* Native-dependent code for GNU/Linux ARC.
-+
-+ Copyright 2020 Free Software Foundation, Inc.
-+
-+ This file is part of GDB.
-+
-+ This program 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 of the License, or
-+ (at your option) any later version.
-+
-+ This program 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.
-+
-+ You should have received a copy of the GNU General Public License
-+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-+
-+#include "defs.h"
-+#include "frame.h"
-+#include "inferior.h"
-+#include "gdbcore.h"
-+#include "regcache.h"
-+#include "gdbsupport/gdb_assert.h"
-+#include "target.h"
-+#include "linux-nat.h"
-+#include "nat/gdb_ptrace.h"
-+
-+#include <stdint.h>
-+#include <sys/types.h>
-+#include <sys/param.h>
-+#include <signal.h>
-+#include <sys/user.h>
-+#include <sys/ioctl.h>
-+#include "gdbsupport/gdb_wait.h"
-+#include <fcntl.h>
-+#include <sys/procfs.h>
-+#include <linux/elf.h>
-+
-+#include "gregset.h"
-+#include "arc-tdep.h"
-+#include "arc-linux-tdep.h"
-+#include "arch/arc.h"
-+
-+/* Defines ps_err_e, struct ps_prochandle. */
-+#include "gdb_proc_service.h"
-+
-+/* Linux starting with 4.12 supports NT_ARC_V2 note type, which adds R30,
-+ R58 and R59 registers, which are specific to ARC HS and aren't
-+ available in ARC 700. */
-+#if defined (NT_ARC_V2) && defined (__ARCHS__)
-+#define ARC_HAS_V2_REGSET
-+#endif
-+
-+class arc_linux_nat_target final : public linux_nat_target
-+{
-+public:
-+ /* Add ARC register access methods. */
-+ void fetch_registers (struct regcache *, int) override;
-+ void store_registers (struct regcache *, int) override;
-+
-+ const struct target_desc *read_description () override;
-+
-+ /* Handle threads */
-+ void low_prepare_to_resume (struct lwp_info *lp) override;
-+};
-+
-+static arc_linux_nat_target the_arc_linux_nat_target;
-+
-+/* Read general registers from target process/thread (via ptrace)
-+ into REGCACHE. */
-+
-+static void
-+fetch_gregs (struct regcache *regcache, int regnum)
-+{
-+ const int tid = get_ptrace_pid (regcache->ptid ());
-+ struct iovec iov;
-+ gdb_gregset_t regs;
-+
-+ iov.iov_base = &regs;
-+ iov.iov_len = sizeof (gdb_gregset_t);
-+
-+ if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, (void *) &iov) < 0)
-+ perror_with_name (_("Couldn't get general registers"));
-+ else
-+ arc_linux_supply_gregset (NULL, regcache, regnum, &regs, 0);
-+}
-+
-+#ifdef ARC_HAS_V2_REGSET
-+/* Read ARC v2 registers from target process/thread (via ptrace)
-+ into REGCACHE. */
-+
-+static void
-+fetch_v2_regs (struct regcache *regcache, int regnum)
-+{
-+ const int tid = get_ptrace_pid (regcache->ptid ());
-+ struct iovec iov;
-+ bfd_byte v2_buffer[ARC_LINUX_SIZEOF_V2_REGSET];
-+
-+ iov.iov_base = &v2_buffer;
-+ iov.iov_len = ARC_LINUX_SIZEOF_V2_REGSET;
-+
-+ if (ptrace (PTRACE_GETREGSET, tid, NT_ARC_V2, (void *) &iov) < 0)
-+ perror_with_name (_("Couldn't get ARC HS registers"));
-+ else
-+ arc_linux_supply_v2_regset (NULL, regcache, regnum, v2_buffer, 0);
-+}
-+#endif
-+
-+/* Store general registers from REGCACHE into the target process/thread. */
-+
-+static void
-+store_gregs (const struct regcache *regcache, int regnum)
-+{
-+ const int tid = get_ptrace_pid (regcache->ptid ());
-+ struct iovec iov;
-+ gdb_gregset_t regs;
-+
-+ iov.iov_base = &regs;
-+ iov.iov_len = sizeof (gdb_gregset_t);
-+
-+ if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, (void *) &iov) < 0)
-+ perror_with_name (_("Couldn't get general registers"));
-+ else
-+ {
-+ arc_linux_collect_gregset (NULL, regcache, regnum, regs, 0);
-+
-+ if (ptrace (PTRACE_SETREGSET, tid, NT_PRSTATUS, (void *) &iov) < 0)
-+ perror_with_name (_("Couldn't write general registers"));
-+ }
-+}
-+
-+#ifdef ARC_HAS_V2_REGSET
-+/* Store ARC v2 registers from REGCACHE into the target process/thread. */
-+
-+static void
-+store_v2_regs (const struct regcache *regcache, int regnum)
-+{
-+ const int tid = get_ptrace_pid (regcache->ptid ());
-+ struct iovec iov;
-+ bfd_byte v2_buffer[ARC_LINUX_SIZEOF_V2_REGSET];
-+
-+ iov.iov_base = &v2_buffer;
-+ iov.iov_len = ARC_LINUX_SIZEOF_V2_REGSET;
-+
-+ if (ptrace (PTRACE_GETREGSET, tid, NT_ARC_V2, (void *) &iov) < 0)
-+ perror_with_name (_("Couldn't get ARC HS registers"));
-+ else
-+ {
-+ arc_linux_collect_v2_regset (NULL, regcache, regnum, v2_buffer, 0);
-+
-+ if (ptrace (PTRACE_SETREGSET, tid, NT_ARC_V2, (void *) &iov) < 0)
-+ perror_with_name (_("Couldn't write ARC HS registers"));
-+ }
-+}
-+#endif
-+
-+/* Target operation: Read REGNUM register (all registers if REGNUM == -1)
-+ from target process into REGCACHE. */
-+
-+void
-+arc_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum)
-+{
-+
-+ if (regnum == -1 || regnum <= ARC_LAST_REGNUM)
-+ fetch_gregs (regcache, regnum);
-+
-+#ifdef ARC_HAS_V2_REGSET
-+ if (regnum == -1
-+ || regnum == ARC_R30_REGNUM
-+ || regnum == ARC_R58_REGNUM
-+ || regnum == ARC_R59_REGNUM)
-+ fetch_v2_regs (regcache, regnum);
-+#endif
-+}
-+
-+/* Target operation: Store REGNUM register (all registers if REGNUM == -1)
-+ to the target process from REGCACHE. */
-+
-+void
-+arc_linux_nat_target::store_registers (struct regcache *regcache, int regnum)
-+{
-+ if (regnum == -1 || regnum <= ARC_LAST_REGNUM)
-+ store_gregs (regcache, regnum);
-+
-+#ifdef ARC_HAS_V2_REGSET
-+ if (regnum == -1
-+ || regnum == ARC_R30_REGNUM
-+ || regnum == ARC_R58_REGNUM
-+ || regnum == ARC_R59_REGNUM)
-+ store_v2_regs (regcache, regnum);
-+#endif
-+}
-+
-+/* Copy general purpose register(s) from REGCACHE into regset GREGS.
-+ This function is exported to proc-service.c */
-+
-+void
-+fill_gregset (const struct regcache *regcache,
-+ gdb_gregset_t *gregs, int regnum)
-+{
-+ arc_linux_collect_gregset (NULL, regcache, regnum, gregs, 0);
-+}
-+
-+/* Copy all the general purpose registers from regset GREGS into REGCACHE.
-+ This function is exported to proc-service.c. */
-+
-+void
-+supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregs)
-+{
-+ arc_linux_supply_gregset (NULL, regcache, -1, gregs, 0);
-+}
-+
-+/* ARC doesn't have separate FP registers. This function is exported
-+ to proc-service.c. */
-+
-+void
-+fill_fpregset (const struct regcache *regcache,
-+ gdb_fpregset_t *fpregsetp, int regnum)
-+{
-+ if (arc_debug)
-+ debug_printf ("arc-linux-nat: fill_fpregset called.");
-+ return;
-+}
-+
-+/* ARC doesn't have separate FP registers. This function is exported
-+ to proc-service.c. */
-+
-+void
-+supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
-+{
-+ if (arc_debug)
-+ debug_printf ("arc-linux-nat: supply_fpregset called.");
-+ return;
-+}
-+
-+/* Implement the "read_description" method of linux_nat_target. */
-+
-+const struct target_desc *
-+arc_linux_nat_target::read_description ()
-+{
-+ /* This is a native target, hence description is hardcoded. */
-+#ifdef __ARCHS__
-+ arc_arch_features features (4, ARC_ISA_ARCV2);
-+#else
-+ arc_arch_features features (4, ARC_ISA_ARCV1);
-+#endif
-+ return arc_lookup_target_description (features);
-+}
-+
-+/* As described in arc_linux_collect_gregset(), we need to write resume-PC
-+ to ERET. However by default GDB for native targets doesn't write
-+ registers if they haven't been changed. This is a callback called by
-+ generic GDB, and in this callback we have to rewrite PC value so it
-+ would force rewrite of register on target. It seems that the only
-+ other arch that utilizes this hook is x86/x86-64 for HW breakpoint
-+ support. But then, AFAIK no other arch has this stop_pc/eret
-+ complexity.
-+
-+ No better way was found, other than this fake write of register value,
-+ to force GDB into writing register to target. Is there any? */
-+
-+void
-+arc_linux_nat_target::low_prepare_to_resume (struct lwp_info *lwp)
-+{
-+ /* When new processes and threads are created we do not have the address
-+ space for them and calling get_thread_regcache will cause an internal
-+ error in GDB. It looks like that checking for last_resume_kind is the
-+ sensible way to determine processes for which we cannot get regcache.
-+ Ultimately, a better way would be removing the need for
-+ low_prepare_to_resume in the first place. */
-+ if (lwp->last_resume_kind == resume_stop)
-+ return;
-+
-+ struct regcache *regcache = get_thread_regcache (this, lwp->ptid);
-+ struct gdbarch *gdbarch = regcache->arch ();
-+
-+ /* Read current PC value, then write it back. It is required to call
-+ invalidate(), otherwise GDB will note that new value is equal to old
-+ value and will skip write. */
-+ ULONGEST new_pc;
-+ regcache_cooked_read_unsigned (regcache, gdbarch_pc_regnum (gdbarch),
-+ &new_pc);
-+ regcache->invalidate (gdbarch_pc_regnum (gdbarch));
-+ regcache_cooked_write_unsigned (regcache, gdbarch_pc_regnum (gdbarch),
-+ new_pc);
-+}
-+
-+/* Fetch the thread-local storage pointer for libthread_db. Note that
-+ this function is not called from GDB, but is called from libthread_db.
-+ This is required to debug multithreaded applications with NPTL. */
-+
-+ps_err_e
-+ps_get_thread_area (struct ps_prochandle *ph, lwpid_t lwpid, int idx,
-+ void **base)
-+{
-+ if (arc_debug >= 2)
-+ debug_printf ("arc-linux-nat: ps_get_thread_area called");
-+
-+ if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
-+ return PS_ERR;
-+
-+ /* IDX is the bias from the thread pointer to the beginning of the
-+ thread descriptor. It has to be subtracted due to implementation
-+ quirks in libthread_db. */
-+ *base = (void *) ((char *) *base - idx);
-+
-+ return PS_OK;
-+}
-+
-+/* Suppress warning from -Wmissing-prototypes. */
-+void _initialize_arc_linux_nat ();
-+void
-+_initialize_arc_linux_nat ()
-+{
-+ /* Register the target. */
-+ linux_target = &the_arc_linux_nat_target;
-+ add_inf_child_target (&the_arc_linux_nat_target);
-+}
-diff --git a/gdb/configure.host b/gdb/configure.host
-index ce528237291..e94a19b0332 100644
---- a/gdb/configure.host
-+++ b/gdb/configure.host
-@@ -60,6 +60,7 @@ case "${host_cpu}" in
-
- aarch64*) gdb_host_cpu=aarch64 ;;
- alpha*) gdb_host_cpu=alpha ;;
-+arc*) gdb_host_cpu=arc ;;
- arm*) gdb_host_cpu=arm ;;
- hppa*) gdb_host_cpu=pa ;;
- i[34567]86*) gdb_host_cpu=i386 ;;
-@@ -91,6 +92,8 @@ alpha*-*-netbsd* | alpha*-*-knetbsd*-gnu)
- gdb_host=nbsd ;;
- alpha*-*-openbsd*) gdb_host=nbsd ;;
-
-+arc*-*-linux*) gdb_host=linux ;;
-+
- arm*-*-freebsd*) gdb_host=fbsd ;;
- arm*-*-linux*) gdb_host=linux ;;
- arm*-*-netbsdelf* | arm*-*-knetbsd*-gnu)
-diff --git a/gdb/configure.nat b/gdb/configure.nat
-index bb70e303384..cd11bc86dca 100644
---- a/gdb/configure.nat
-+++ b/gdb/configure.nat
-@@ -238,6 +238,10 @@ case ${gdb_host} in
- nat/aarch64-linux.o \
- nat/aarch64-sve-linux-ptrace.o"
- ;;
-+ arc)
-+ # Host: ARC based machine running GNU/Linux
-+ NATDEPFILES="${NATDEPFILES} arc-linux-nat.o"
-+ ;;
- arm)
- # Host: ARM based machine running GNU/Linux
- NATDEPFILES="${NATDEPFILES} arm-linux-nat.o \
---
-2.16.2
-
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-25 14:10:39 +0000