81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* Copyright (C) 2009-2015 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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This file is part of GDB.
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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#include "break-common.h"
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#include "nat/linux-nat.h"
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#include "nat/aarch64-linux-hw-point.h"
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#include "nat/aarch64-linux.h"
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/* Called when resuming a thread LWP.
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The hardware debug registers are updated when there is any change. */
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void
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aarch64_linux_prepare_to_resume (struct lwp_info *lwp)
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{
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struct arch_lwp_info *info = lwp_arch_private_info (lwp);
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/* NULL means this is the main thread still going through the shell,
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or, no watchpoint has been set yet. In that case, there's
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nothing to do. */
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if (info == NULL)
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return;
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if (DR_HAS_CHANGED (info->dr_changed_bp)
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|| DR_HAS_CHANGED (info->dr_changed_wp))
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{
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ptid_t ptid = ptid_of_lwp (lwp);
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int tid = ptid_get_lwp (ptid);
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struct aarch64_debug_reg_state *state
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= aarch64_get_debug_reg_state (ptid_get_pid (ptid));
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if (show_debug_regs)
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debug_printf ("prepare_to_resume thread %d\n", tid);
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/* Watchpoints. */
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if (DR_HAS_CHANGED (info->dr_changed_wp))
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{
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aarch64_linux_set_debug_regs (state, tid, 1);
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DR_CLEAR_CHANGED (info->dr_changed_wp);
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}
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/* Breakpoints. */
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if (DR_HAS_CHANGED (info->dr_changed_bp))
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{
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aarch64_linux_set_debug_regs (state, tid, 0);
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DR_CLEAR_CHANGED (info->dr_changed_bp);
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}
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}
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}
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/* Function to call when a new thread is detected. */
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void
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aarch64_linux_new_thread (struct lwp_info *lwp)
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{
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struct arch_lwp_info *info = XNEW (struct arch_lwp_info);
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/* Mark that all the hardware breakpoint/watchpoint register pairs
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for this thread need to be initialized (with data from
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aarch_process_info.debug_reg_state). */
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DR_MARK_ALL_CHANGED (info->dr_changed_bp, aarch64_num_bp_regs);
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DR_MARK_ALL_CHANGED (info->dr_changed_wp, aarch64_num_wp_regs);
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lwp_set_arch_private_info (lwp, info);
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}
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