gdbstub/user.c

   1 /*
   2  * gdbstub user-mode helper routines.
   3  *
   4  * We know for user-mode we are using TCG so we can call stuff directly.
   5  *
   6  * Copyright (c) 2022 Linaro Ltd
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-or-later
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "exec/gdbstub.h"
  13 #include "hw/core/cpu.h"
  14 #include "internals.h"
  15
  16 bool gdb_supports_guest_debug(void)
  17 {
  18     /* user-mode == TCG == supported */
  19     return true;
  20 }
  21
  22 int gdb_breakpoint_insert(CPUState *cs, int type, vaddr addr, vaddr len)
  23 {
  24     CPUState *cpu;
  25     int err = 0;
  26
  27     switch (type) {
  28     case GDB_BREAKPOINT_SW:
  29     case GDB_BREAKPOINT_HW:
  30         CPU_FOREACH(cpu) {
  31             err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL);
  32             if (err) {
  33                 break;
  34             }
  35         }
  36         return err;
  37     default:
  38         /* user-mode doesn't support watchpoints */
  39         return -ENOSYS;
  40     }
  41 }
  42
  43 int gdb_breakpoint_remove(CPUState *cs, int type, vaddr addr, vaddr len)
  44 {
  45     CPUState *cpu;
  46     int err = 0;
  47
  48     switch (type) {
  49     case GDB_BREAKPOINT_SW:
  50     case GDB_BREAKPOINT_HW:
  51         CPU_FOREACH(cpu) {
  52             err = cpu_breakpoint_remove(cpu, addr, BP_GDB);
  53             if (err) {
  54                 break;
  55             }
  56         }
  57         return err;
  58     default:
  59         /* user-mode doesn't support watchpoints */
  60         return -ENOSYS;
  61     }
  62 }
  63
  64 void gdb_breakpoint_remove_all(CPUState *cs)
  65 {
  66     cpu_breakpoint_remove_all(cs, BP_GDB);
  67 }