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>
117 lines
3.8 KiB
C
117 lines
3.8 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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#ifndef GDB_NAT_LOONGARCH_LINUX_HW_POINT_H
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#define GDB_NAT_LOONGARCH_LINUX_HW_POINT_H
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#include "gdbsupport/break-common.h" /* For enum target_hw_bp_type. */
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#include "nat/loongarch-hw-point.h"
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struct loongarch_user_watch_state {
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uint64_t dbg_info;
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struct {
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uint64_t addr;
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uint64_t mask;
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uint32_t ctrl;
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uint32_t pad;
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} dbg_regs[14];
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};
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/* Macros to extract fields from the hardware debug information word. */
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#define LOONGARCH_DEBUG_NUM_SLOTS(x) ((x) & 0xffff)
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/* Each bit of a variable of this type is used to indicate whether a
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hardware breakpoint or watchpoint setting has been changed since
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the last update.
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Bit N corresponds to the Nth hardware breakpoint or watchpoint
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setting which is managed in loongarch_debug_reg_state, where N is
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valid between 0 and the total number of the hardware breakpoint or
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watchpoint debug registers minus 1.
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When bit N is 1, the corresponding breakpoint or watchpoint setting
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has changed, and therefore the corresponding hardware debug
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register needs to be updated via the ptrace interface.
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In the per-thread arch-specific data area, we define two such
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variables for per-thread hardware breakpoint and watchpoint
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settings respectively.
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This type is part of the mechanism which helps reduce the number of
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ptrace calls to the kernel, i.e. avoid asking the kernel to write
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to the debug registers with unchanged values. */
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typedef ULONGEST dr_changed_t;
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/* Set each of the lower M bits of X to 1; assert X is wide enough. */
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#define DR_MARK_ALL_CHANGED(x, m) \
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do \
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{ \
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gdb_assert (sizeof ((x)) * 8 >= (m)); \
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(x) = (((dr_changed_t)1 << (m)) - 1); \
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} while (0)
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#define DR_MARK_N_CHANGED(x, n) \
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do \
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{ \
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(x) |= ((dr_changed_t)1 << (n)); \
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} while (0)
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#define DR_CLEAR_CHANGED(x) \
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do \
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{ \
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(x) = 0; \
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} while (0)
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#define DR_HAS_CHANGED(x) ((x) != 0)
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#define DR_N_HAS_CHANGED(x, n) ((x) & ((dr_changed_t)1 << (n)))
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/* Per-thread arch-specific data we want to keep. */
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struct arch_lwp_info
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{
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/* When bit N is 1, it indicates the Nth hardware breakpoint or
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watchpoint register pair needs to be updated when the thread is
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resumed; see loongarch_linux_prepare_to_resume. */
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dr_changed_t dr_changed_bp;
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dr_changed_t dr_changed_wp;
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};
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/* Call ptrace to set the thread TID's hardware breakpoint/watchpoint
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registers with data from *STATE. */
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void loongarch_linux_set_debug_regs (struct loongarch_debug_reg_state *state,
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int tid, int watchpoint);
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/* Get the hardware debug register capacity information from the
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process represented by TID. */
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void loongarch_linux_get_debug_reg_capacity (int tid);
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/* Return the debug register state for process PID. If no existing
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state is found for this process, create new state. */
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struct loongarch_debug_reg_state *loongarch_get_debug_reg_state (pid_t pid);
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#endif /* GDB_NAT_LOONGARCH_LINUX_HW_POINT_H */
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