forked from Imagelibrary/binutils-gdb
d01e823438
This updates the copyright headers to include 2025. I did this by running gdb/copyright.py and then manually modifying a few files as noted by the script. Approved-By: Eli Zaretskii <eliz@gnu.org>
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* Native-dependent code for GNU/Linux on LoongArch processors.
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Copyright (C) 2024-2025 Free Software Foundation, Inc.
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Contributed by Loongson 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 "gdbsupport/break-common.h"
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#include "nat/linux-nat.h"
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#include "nat/loongarch-linux-hw-point.h"
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#include "nat/loongarch-linux.h"
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#include "elf/common.h"
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#include "nat/gdb_ptrace.h"
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#include <asm/ptrace.h>
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#include <sys/uio.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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loongarch_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.lwp ();
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struct loongarch_debug_reg_state *state
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= loongarch_get_debug_reg_state (ptid.pid ());
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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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loongarch_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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loongarch_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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loongarch_linux_new_thread (struct lwp_info *lwp)
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{
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ptid_t ptid = ptid_of_lwp (lwp);
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struct loongarch_debug_reg_state *state
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= loongarch_get_debug_reg_state (ptid.pid ());
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struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
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/* If there are hardware breakpoints/watchpoints in the process then mark that
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all the hardware breakpoint/watchpoint register pairs for this thread need
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to be initialized (with data from arch_process_info.debug_reg_state). */
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if (loongarch_any_set_debug_regs_state (state, false))
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DR_MARK_ALL_CHANGED (info->dr_changed_bp, loongarch_num_bp_regs);
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if (loongarch_any_set_debug_regs_state (state, true))
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DR_MARK_ALL_CHANGED (info->dr_changed_wp, loongarch_num_wp_regs);
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lwp_set_arch_private_info (lwp, info);
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}
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/* See nat/loongarch-linux.h. */
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void
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loongarch_linux_delete_thread (struct arch_lwp_info *arch_lwp)
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{
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xfree (arch_lwp);
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}
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