-/* Copyright (C) 2007-2014 Free Software Foundation, Inc.
+/* Copyright (C) 2007-2015 Free Software Foundation, Inc.
This file is part of GDB.
static struct x86_debug_reg_state debug_reg_state;
-static int debug_registers_changed = 0;
-static int debug_registers_used = 0;
+static int
+update_debug_registers_callback (struct inferior_list_entry *entry,
+ void *pid_p)
+{
+ struct thread_info *thr = (struct thread_info *) entry;
+ win32_thread_info *th = inferior_target_data (thr);
+ int pid = *(int *) pid_p;
+
+ /* Only update the threads of this process. */
+ if (pid_of (thr) == pid)
+ {
+ /* The actual update is done later just before resuming the lwp,
+ we just mark that the registers need updating. */
+ th->debug_registers_changed = 1;
+ }
+
+ return 0;
+}
/* Update the inferior's debug register REGNUM from STATE. */
static void
x86_dr_low_set_addr (int regnum, CORE_ADDR addr)
{
- gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
-
- /* debug_reg_state.dr_mirror is already set.
- Just notify i386_set_thread_context, i386_thread_added
- that the registers need to be updated. */
- debug_registers_changed = 1;
- debug_registers_used = 1;
-}
+ /* Only update the threads of this process. */
+ int pid = pid_of (current_thread);
-static CORE_ADDR
-x86_dr_low_get_addr (int regnum)
-{
gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
- return debug_reg_state.dr_mirror[regnum];
+ find_inferior (&all_threads, update_debug_registers_callback, &pid);
}
/* Update the inferior's DR7 debug control register from STATE. */
static void
x86_dr_low_set_control (unsigned long control)
{
- /* debug_reg_state.dr_control_mirror is already set.
- Just notify i386_set_thread_context, i386_thread_added
- that the registers need to be updated. */
- debug_registers_changed = 1;
- debug_registers_used = 1;
+ /* Only update the threads of this process. */
+ int pid = pid_of (current_thread);
+
+ find_inferior (&all_threads, update_debug_registers_callback, &pid);
+}
+
+/* Return the current value of a DR register of the current thread's
+ context. */
+
+static DWORD64
+win32_get_current_dr (int dr)
+{
+ win32_thread_info *th = inferior_target_data (current_thread);
+
+ win32_require_context (th);
+
+#define RET_DR(DR) \
+ case DR: \
+ return th->context.Dr ## DR
+
+ switch (dr)
+ {
+ RET_DR (0);
+ RET_DR (1);
+ RET_DR (2);
+ RET_DR (3);
+ RET_DR (6);
+ RET_DR (7);
+ }
+
+#undef RET_DR
+
+ gdb_assert_not_reached ("unhandled dr");
+}
+
+static CORE_ADDR
+x86_dr_low_get_addr (int regnum)
+{
+ gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
+
+ return win32_get_current_dr (regnum - DR_FIRSTADDR);
}
static unsigned long
x86_dr_low_get_control (void)
{
- return debug_reg_state.dr_control_mirror;
+ return win32_get_current_dr (7);
}
/* Get the value of the DR6 debug status register from the inferior
static unsigned long
x86_dr_low_get_status (void)
{
- /* We don't need to do anything here, the last call to thread_rec for
- current_event.dwThreadId id has already set it. */
- return debug_reg_state.dr_status_mirror;
+ return win32_get_current_dr (6);
}
/* Low-level function vector. */
i386_initial_stuff (void)
{
x86_low_init_dregs (&debug_reg_state);
- debug_registers_changed = 0;
- debug_registers_used = 0;
}
static void
-i386_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
+i386_get_thread_context (win32_thread_info *th)
{
/* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
the system doesn't support extended registers. */
error ("GetThreadContext failure %ld\n", (long) e);
}
-
- debug_registers_changed = 0;
-
- if (th->tid == current_event->dwThreadId)
- {
- /* Copy dr values from the current thread. */
- struct x86_debug_reg_state *dr = &debug_reg_state;
- dr->dr_mirror[0] = th->context.Dr0;
- dr->dr_mirror[1] = th->context.Dr1;
- dr->dr_mirror[2] = th->context.Dr2;
- dr->dr_mirror[3] = th->context.Dr3;
- dr->dr_status_mirror = th->context.Dr6;
- dr->dr_control_mirror = th->context.Dr7;
- }
}
static void
-i386_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
+i386_prepare_to_resume (win32_thread_info *th)
{
- if (debug_registers_changed)
+ if (th->debug_registers_changed)
{
struct x86_debug_reg_state *dr = &debug_reg_state;
+
+ win32_require_context (th);
+
th->context.Dr0 = dr->dr_mirror[0];
th->context.Dr1 = dr->dr_mirror[1];
th->context.Dr2 = dr->dr_mirror[2];
/* th->context.Dr6 = dr->dr_status_mirror;
FIXME: should we set dr6 also ?? */
th->context.Dr7 = dr->dr_control_mirror;
- }
- SetThreadContext (th->h, &th->context);
+ th->debug_registers_changed = 0;
+ }
}
static void
i386_thread_added (win32_thread_info *th)
{
- /* Set the debug registers for the new thread if they are used. */
- if (debug_registers_used)
- {
- struct x86_debug_reg_state *dr = &debug_reg_state;
- th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
- GetThreadContext (th->h, &th->context);
-
- th->context.Dr0 = dr->dr_mirror[0];
- th->context.Dr1 = dr->dr_mirror[1];
- th->context.Dr2 = dr->dr_mirror[2];
- th->context.Dr3 = dr->dr_mirror[3];
- /* th->context.Dr6 = dr->dr_status_mirror;
- FIXME: should we set dr6 also ?? */
- th->context.Dr7 = dr->dr_control_mirror;
-
- SetThreadContext (th->h, &th->context);
- th->context.ContextFlags = 0;
- }
+ th->debug_registers_changed = 1;
}
static void
sizeof (mappings) / sizeof (mappings[0]),
i386_initial_stuff,
i386_get_thread_context,
- i386_set_thread_context,
+ i386_prepare_to_resume,
i386_thread_added,
i386_fetch_inferior_register,
i386_store_inferior_register,
projects / deliverable / binutils-gdb.git / blobdiff