diff options
Diffstat (limited to 'meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch')
-rw-r--r-- | meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch | 414 |
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 = ®s; -+ 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, ®s, 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 = ®s; -+ 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 - |