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/hwaddr.h"
  13 #include "exec/gdbstub.h"
  14 #include "hw/core/cpu.h"
  15 #include "internals.h"
  16
  17 bool gdb_supports_guest_debug(void)
  18 {
  19     /* user-mode == TCG == supported */
  20     return true;
  21 }
  22
  23 int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len)
  24 {
  25     CPUState *cpu;
  26     int err = 0;
  27
  28     switch (type) {
  29     case GDB_BREAKPOINT_SW:
  30     case GDB_BREAKPOINT_HW:
  31         CPU_FOREACH(cpu) {
  32             err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL);
  33             if (err) {
  34                 break;
  35             }
  36         }
  37         return err;
  38     default:
  39         /* user-mode doesn't support watchpoints */
  40         return -ENOSYS;
  41     }
  42 }
  43
  44 int gdb_breakpoint_remove(CPUState *cs, int type, hwaddr addr, hwaddr len)
  45 {
  46     CPUState *cpu;
  47     int err = 0;
  48
  49     switch (type) {
  50     case GDB_BREAKPOINT_SW:
  51     case GDB_BREAKPOINT_HW:
  52         CPU_FOREACH(cpu) {
  53             err = cpu_breakpoint_remove(cpu, addr, BP_GDB);
  54             if (err) {
  55                 break;
  56             }
  57         }
  58         return err;
  59     default:
  60         /* user-mode doesn't support watchpoints */
  61         return -ENOSYS;
  62     }
  63 }
  64
  65 void gdb_breakpoint_remove_all(CPUState *cs)
  66 {
  67     cpu_breakpoint_remove_all(cs, BP_GDB);
  68 }