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>
112 lines
4.0 KiB
C
112 lines
4.0 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_HW_POINT_H
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#define GDB_NAT_LOONGARCH_HW_POINT_H
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/* Macro definitions, data structures, and code for the hardware
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breakpoint and hardware watchpoint support follow. We use the
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following abbreviations throughout the code:
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hw - hardware
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bp - breakpoint
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wp - watchpoint */
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/* Maximum number of hardware breakpoint and watchpoint registers.
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Neither of these values may exceed the width of dr_changed_t
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measured in bits. */
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#define LOONGARCH_HBP_MAX_NUM 14
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#define LOONGARCH_HWP_MAX_NUM 14
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/* The maximum length of a memory region that can be watched by one
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hardware watchpoint register. */
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#define LOONGARCH_HWP_MAX_LEN_PER_REG 8
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#define CTRL_PLV3_ENABLE 0x10
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#define DR_CONTROL_ENABLED(ctrl) ((ctrl & CTRL_PLV3_ENABLE) == CTRL_PLV3_ENABLE)
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/* Structure for managing the hardware breakpoint/watchpoint resources.
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DR_ADDR_* stores the address, DR_CTRL_* stores the control register
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content, and DR_REF_COUNT_* counts the numbers of references to the
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corresponding bp/wp, by which way the limited hardware resources
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are not wasted on duplicated bp/wp settings (though so far gdb has
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done a good job by not sending duplicated bp/wp requests). */
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struct loongarch_debug_reg_state
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{
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/* hardware breakpoint */
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CORE_ADDR dr_addr_bp[LOONGARCH_HBP_MAX_NUM];
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unsigned int dr_ctrl_bp[LOONGARCH_HBP_MAX_NUM];
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unsigned int dr_ref_count_bp[LOONGARCH_HBP_MAX_NUM];
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/* hardware watchpoint */
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CORE_ADDR dr_addr_wp[LOONGARCH_HWP_MAX_NUM];
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unsigned int dr_ctrl_wp[LOONGARCH_HWP_MAX_NUM];
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unsigned int dr_ref_count_wp[LOONGARCH_HWP_MAX_NUM];
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};
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extern int loongarch_num_bp_regs;
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extern int loongarch_num_wp_regs;
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/* Invoked when IDXth breakpoint/watchpoint register pair needs to be
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updated. */
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void loongarch_notify_debug_reg_change (ptid_t ptid, int is_watchpoint,
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unsigned int idx);
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int loongarch_handle_breakpoint (enum target_hw_bp_type type, CORE_ADDR addr,
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int len, int is_insert, ptid_t ptid,
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struct loongarch_debug_reg_state *state);
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int loongarch_handle_watchpoint (enum target_hw_bp_type type, CORE_ADDR addr,
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int len, int is_insert, ptid_t ptid,
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struct loongarch_debug_reg_state *state);
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/* Return TRUE if there are any hardware breakpoints. If WATCHPOINT is TRUE,
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check hardware watchpoints instead. */
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bool loongarch_any_set_debug_regs_state (loongarch_debug_reg_state *state,
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bool watchpoint);
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/* Print the values of the cached breakpoint/watchpoint registers. */
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void loongarch_show_debug_reg_state (struct loongarch_debug_reg_state *state,
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const char *func, CORE_ADDR addr,
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int len, enum target_hw_bp_type type);
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/* Return true if we can watch a memory region that starts address
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ADDR and whose length is LEN in bytes. */
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int loongarch_region_ok_for_watchpoint (CORE_ADDR addr, int len);
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/* Helper for the "stopped_data_address/low_stopped_data_address" target
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method. Returns TRUE if a hardware watchpoint trap at ADDR_TRAP matches
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a set watchpoint. The address of the matched watchpoint is returned in
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*ADDR_P. */
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bool loongarch_stopped_data_address (const struct loongarch_debug_reg_state *state,
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CORE_ADDR addr_trap, CORE_ADDR *addr_p);
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#endif /* GDB_NAT_LOONGARCH_HW_POINT_H */
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