/* Called when resuming a thread.
If the debug regs have changed, update the thread's copies. */
static void
arm_prepare_to_resume (struct lwp_info *lwp)
{
struct thread_info *thread = get_lwp_thread (lwp);
int pid = lwpid_of (thread);
struct process_info *proc = find_process_pid (pid_of (thread));
struct arch_process_info *proc_info = proc->priv->arch_private;
struct arch_lwp_info *lwp_info = lwp->arch_private;
int i;
for (i = 0; i < arm_linux_get_hw_breakpoint_count (); i++)
if (lwp_info->bpts_changed[i])
{
errno = 0;
if (arm_hwbp_control_is_enabled (proc_info->bpts[i].control))
if (ptrace (PTRACE_SETHBPREGS, pid,
(PTRACE_TYPE_ARG3) ((i << 1) + 1),
&proc_info->bpts[i].address) < 0)
perror_with_name ("Unexpected error setting breakpoint address");
if (arm_hwbp_control_is_initialized (proc_info->bpts[i].control))
if (ptrace (PTRACE_SETHBPREGS, pid,
(PTRACE_TYPE_ARG3) ((i << 1) + 2),
&proc_info->bpts[i].control) < 0)
perror_with_name ("Unexpected error setting breakpoint");
lwp_info->bpts_changed[i] = 0;
}
for (i = 0; i < arm_linux_get_hw_watchpoint_count (); i++)
if (lwp_info->wpts_changed[i])
{
errno = 0;
if (arm_hwbp_control_is_enabled (proc_info->wpts[i].control))
if (ptrace (PTRACE_SETHBPREGS, pid,
(PTRACE_TYPE_ARG3) -((i << 1) + 1),
&proc_info->wpts[i].address) < 0)
perror_with_name ("Unexpected error setting watchpoint address");
if (arm_hwbp_control_is_initialized (proc_info->wpts[i].control))
if (ptrace (PTRACE_SETHBPREGS, pid,
(PTRACE_TYPE_ARG3) -((i << 1) + 2),
&proc_info->wpts[i].control) < 0)
perror_with_name ("Unexpected error setting watchpoint");
lwp_info->wpts_changed[i] = 0;
}
}
/* Insert hardware break-/watchpoint. */
static int
arm_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
int len, struct raw_breakpoint *bp)
{
struct process_info *proc = current_process ();
struct arm_linux_hw_breakpoint p, *pts;
int watch, i, count;
watch = arm_linux_hw_point_initialize (type, addr, len, &p);
if (watch < 0)
{
/* Unsupported. */
return watch == -1 ? 1 : -1;
}
if (watch)
{
count = arm_linux_get_hw_watchpoint_count ();
pts = proc->priv->arch_private->wpts;
}
else
{
count = arm_linux_get_hw_breakpoint_count ();
pts = proc->priv->arch_private->bpts;
}
for (i = 0; i < count; i++)
if (!arm_hwbp_control_is_enabled (pts[i].control))
{
pts[i] = p;
/* Only update the threads of the current process. */
for_each_thread (current_thread->id.pid (), [&] (thread_info *thread)
{
update_registers_callback (thread, watch, i);
});
return 0;
}
/* We're out of watchpoints. */
return -1;
}
/* Insert hardware break-/watchpoint. */
static int
arm_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
int len, struct raw_breakpoint *bp)
{
struct process_info *proc = current_process ();
struct arm_linux_hw_breakpoint p, *pts;
int watch, i, count;
watch = arm_linux_hw_point_initialize (type, addr, len, &p);
if (watch < 0)
{
/* Unsupported. */
return watch == -1 ? 1 : -1;
}
if (watch)
{
count = arm_linux_get_hw_watchpoint_count ();
pts = proc->priv->arch_private->wpts;
}
else
{
count = arm_linux_get_hw_breakpoint_count ();
pts = proc->priv->arch_private->bpts;
}
for (i = 0; i < count; i++)
if (!arm_hwbp_control_is_enabled (pts[i].control))
{
struct update_registers_data data = { watch, i };
pts[i] = p;
find_inferior (&all_threads, update_registers_callback, &data);
return 0;
}
/* We're out of watchpoints. */
return -1;
}
