gdb/aarch64-nat.h

   1 /* Native-dependent code for AArch64.
   2
   3    Copyright (C) 2011-2023 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef AARCH64_NAT_H
  21 #define AARCH64_NAT_H
  22
  23 #include "breakpoint.h"
  24 #include "nat/aarch64-hw-point.h"
  25 #include "target.h"
  26
  27 /* Hardware-assisted breakpoints and watchpoints.  */
  28
  29 /* Initialize platform-independent state for hardware-assisted
  30    breakpoints and watchpoints.  */
  31
  32 void aarch64_initialize_hw_point ();
  33
  34 /* Return the debug register state for process PID.  If no existing
  35    state is found for this process, return nullptr.  */
  36
  37 struct aarch64_debug_reg_state *aarch64_lookup_debug_reg_state (pid_t pid);
  38
  39 /* Return the debug register state for process PID.  If no existing
  40    state is found for this process, create new state.  */
  41
  42 struct aarch64_debug_reg_state *aarch64_get_debug_reg_state (pid_t pid);
  43
  44 /* Remove any existing per-process debug state for process PID.  */
  45
  46 void aarch64_remove_debug_reg_state (pid_t pid);
  47
  48 /* Helper for the "stopped_data_address" target method.  Returns TRUE
  49    if a hardware watchpoint trap at ADDR_TRAP matches a set
  50    watchpoint.  The address of the matched watchpoint is returned in
  51    *ADDR_P.  */
  52
  53 bool aarch64_stopped_data_address (const struct aarch64_debug_reg_state *state,
  54                                    CORE_ADDR addr_trap, CORE_ADDR *addr_p);
  55
  56 /* Helper functions used by aarch64_nat_target below.  See their
  57    definitions.  */
  58
  59 int aarch64_can_use_hw_breakpoint (enum bptype type, int cnt, int othertype);
  60 int aarch64_insert_watchpoint (CORE_ADDR addr, int len,
  61                                enum target_hw_bp_type type,
  62                                struct expression *cond);
  63 int aarch64_remove_watchpoint (CORE_ADDR addr, int len,
  64                                enum target_hw_bp_type type,
  65                                struct expression *cond);
  66 int aarch64_insert_hw_breakpoint (struct gdbarch *gdbarch,
  67                                   struct bp_target_info *bp_tgt);
  68 int aarch64_remove_hw_breakpoint (struct gdbarch *gdbarch,
  69                                   struct bp_target_info *bp_tgt);
  70 int aarch64_stopped_by_hw_breakpoint ();
  71
  72 /* Convenience template mixin used to add aarch64 watchpoints support to a
  73    target.  */
  74
  75 template <typename BaseTarget>
  76 struct aarch64_nat_target : public BaseTarget
  77 {
  78   /* Hook in common aarch64 hardware watchpoints/breakpoints support.  */
  79
  80   int can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) override
  81   { return aarch64_can_use_hw_breakpoint (type, cnt, othertype); }
  82
  83   int region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) override
  84   { return aarch64_region_ok_for_watchpoint (addr, len); }
  85
  86   int insert_watchpoint (CORE_ADDR addr, int len,
  87                          enum target_hw_bp_type type,
  88                          struct expression *cond) override
  89   { return aarch64_insert_watchpoint (addr, len, type, cond); }
  90
  91   int remove_watchpoint (CORE_ADDR addr, int len,
  92                          enum target_hw_bp_type type,
  93                          struct expression *cond) override
  94   { return aarch64_remove_watchpoint (addr, len, type, cond); }
  95
  96   int insert_hw_breakpoint (struct gdbarch *gdbarch,
  97                             struct bp_target_info *bp_tgt) override
  98   { return aarch64_insert_hw_breakpoint (gdbarch, bp_tgt); }
  99
 100   int remove_hw_breakpoint (struct gdbarch *gdbarch,
 101                             struct bp_target_info *bp_tgt) override
 102   { return aarch64_remove_hw_breakpoint (gdbarch, bp_tgt); }
 103
 104   bool watchpoint_addr_within_range (CORE_ADDR addr, CORE_ADDR start,
 105                                      int length) override
 106   { return start <= addr && start + length - 1 >= addr; }
 107 };
 108
 109 #endif /* AARCH64_NAT_H */