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0ee25f97d2
Commit 9a03f218 ("Fix gdb.base/watchpoint-unaligned.exp on aarch64")
fixed a watchpoint bug in gdb -- but did not touch the corresponding
code in gdbserver.
This patch moves the gdb code into gdb/nat, so that it can be shared
with gdbserver, and then changes gdbserver to use it, fixing the bug.
This is yet another case where having a single back end would prevent
bugs.
I tested this using the AdaCore internal gdb testsuite.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29423
Approved-By: Luis Machado <luis.machado@arm.com>
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
/* Native-dependent code for AArch64.
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Copyright (C) 2011-2024 Free Software Foundation, Inc.
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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 AARCH64_NAT_H
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#define AARCH64_NAT_H
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#include "breakpoint.h"
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#include "nat/aarch64-hw-point.h"
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#include "target.h"
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/* Hardware-assisted breakpoints and watchpoints. */
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/* Initialize platform-independent state for hardware-assisted
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breakpoints and watchpoints. */
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void aarch64_initialize_hw_point ();
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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, return nullptr. */
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struct aarch64_debug_reg_state *aarch64_lookup_debug_reg_state (pid_t pid);
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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 aarch64_debug_reg_state *aarch64_get_debug_reg_state (pid_t pid);
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/* Remove any existing per-process debug state for process PID. */
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void aarch64_remove_debug_reg_state (pid_t pid);
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/* Helper functions used by aarch64_nat_target below. See their
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definitions. */
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int aarch64_can_use_hw_breakpoint (enum bptype type, int cnt, int othertype);
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int aarch64_insert_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond);
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int aarch64_remove_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond);
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int aarch64_insert_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt);
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int aarch64_remove_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt);
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int aarch64_stopped_by_hw_breakpoint ();
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/* Convenience template mixin used to add aarch64 watchpoints support to a
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target. */
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template <typename BaseTarget>
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struct aarch64_nat_target : public BaseTarget
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{
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/* Hook in common aarch64 hardware watchpoints/breakpoints support. */
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int can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) override
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{ return aarch64_can_use_hw_breakpoint (type, cnt, othertype); }
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int region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) override
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{ return aarch64_region_ok_for_watchpoint (addr, len); }
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int insert_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond) override
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{ return aarch64_insert_watchpoint (addr, len, type, cond); }
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int remove_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond) override
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{ return aarch64_remove_watchpoint (addr, len, type, cond); }
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int insert_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt) override
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{ return aarch64_insert_hw_breakpoint (gdbarch, bp_tgt); }
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int remove_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt) override
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{ return aarch64_remove_hw_breakpoint (gdbarch, bp_tgt); }
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bool watchpoint_addr_within_range (CORE_ADDR addr, CORE_ADDR start,
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int length) override
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{ return start <= addr && start + length - 1 >= addr; }
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};
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#endif /* AARCH64_NAT_H */
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