| /* Native-dependent code for GNU/Linux on LoongArch processors. |
| |
| Copyright (C) 2024 Free Software Foundation, Inc. |
| Contributed by Loongson Ltd. |
| |
| 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 "gdbsupport/common-defs.h" |
| #include "gdbsupport/break-common.h" |
| #include "nat/linux-nat.h" |
| #include "nat/loongarch-linux-hw-point.h" |
| #include "nat/loongarch-linux.h" |
| |
| #include "elf/common.h" |
| #include "nat/gdb_ptrace.h" |
| #include <asm/ptrace.h> |
| #include <sys/uio.h> |
| |
| /* Called when resuming a thread LWP. |
| The hardware debug registers are updated when there is any change. */ |
| |
| void |
| loongarch_linux_prepare_to_resume (struct lwp_info *lwp) |
| { |
| struct arch_lwp_info *info = lwp_arch_private_info (lwp); |
| |
| /* NULL means this is the main thread still going through the shell, |
| or, no watchpoint has been set yet. In that case, there's |
| nothing to do. */ |
| if (info == NULL) |
| return; |
| |
| if (DR_HAS_CHANGED (info->dr_changed_bp) |
| || DR_HAS_CHANGED (info->dr_changed_wp)) |
| { |
| ptid_t ptid = ptid_of_lwp (lwp); |
| int tid = ptid.lwp (); |
| struct loongarch_debug_reg_state *state |
| = loongarch_get_debug_reg_state (ptid.pid ()); |
| |
| if (show_debug_regs) |
| debug_printf ("prepare_to_resume thread %d\n", tid); |
| |
| /* Watchpoints. */ |
| if (DR_HAS_CHANGED (info->dr_changed_wp)) |
| { |
| loongarch_linux_set_debug_regs (state, tid, 1); |
| DR_CLEAR_CHANGED (info->dr_changed_wp); |
| } |
| |
| /* Breakpoints. */ |
| if (DR_HAS_CHANGED (info->dr_changed_bp)) |
| { |
| loongarch_linux_set_debug_regs (state, tid, 0); |
| DR_CLEAR_CHANGED (info->dr_changed_bp); |
| } |
| } |
| } |
| |
| /* Function to call when a new thread is detected. */ |
| |
| void |
| loongarch_linux_new_thread (struct lwp_info *lwp) |
| { |
| ptid_t ptid = ptid_of_lwp (lwp); |
| struct loongarch_debug_reg_state *state |
| = loongarch_get_debug_reg_state (ptid.pid ()); |
| struct arch_lwp_info *info = XCNEW (struct arch_lwp_info); |
| |
| /* If there are hardware breakpoints/watchpoints in the process then mark that |
| all the hardware breakpoint/watchpoint register pairs for this thread need |
| to be initialized (with data from arch_process_info.debug_reg_state). */ |
| if (loongarch_any_set_debug_regs_state (state, false)) |
| DR_MARK_ALL_CHANGED (info->dr_changed_bp, loongarch_num_bp_regs); |
| if (loongarch_any_set_debug_regs_state (state, true)) |
| DR_MARK_ALL_CHANGED (info->dr_changed_wp, loongarch_num_wp_regs); |
| |
| lwp_set_arch_private_info (lwp, info); |
| } |
| |
| /* See nat/loongarch-linux.h. */ |
| |
| void |
| loongarch_linux_delete_thread (struct arch_lwp_info *arch_lwp) |
| { |
| xfree (arch_lwp); |
| } |