/* Low level interface to i386 running the GNU Hurd.
- Copyright (C) 1992-2014 Free Software Foundation, Inc.
+ Copyright (C) 1992-2015 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "x86-nat.h"
#include "inferior.h"
#include "floatformat.h"
#include "regcache.h"
-#include "gdb_assert.h"
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-
#include <mach.h>
#include <mach_error.h>
#include <mach/message.h>
#include "i386-tdep.h"
#include "gnu-nat.h"
+#include "inf-child.h"
#include "i387-tdep.h"
-#ifdef HAVE_SYS_PROCFS_H
-# include <sys/procfs.h>
-# include "gregset.h"
-#endif
-
/* Offset to the thread_state_t location where REG is stored. */
#define REG_OFFSET(reg) offsetof (struct i386_thread_state, reg)
REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs)
};
-/* Offset to the greg_t location where REG is stored. */
-#define CREG_OFFSET(reg) (REG_##reg * 4)
-
-/* At CREG_OFFSET[N] is the offset to the greg_t location where
- the GDB register N is stored. */
-static int creg_offset[] =
-{
- CREG_OFFSET (EAX), CREG_OFFSET (ECX), CREG_OFFSET (EDX), CREG_OFFSET (EBX),
- CREG_OFFSET (UESP), CREG_OFFSET (EBP), CREG_OFFSET (ESI), CREG_OFFSET (EDI),
- CREG_OFFSET (EIP), CREG_OFFSET (EFL), CREG_OFFSET (CS), CREG_OFFSET (SS),
- CREG_OFFSET (DS), CREG_OFFSET (ES), CREG_OFFSET (FS), CREG_OFFSET (GS)
-};
-
#define REG_ADDR(state, regnum) ((char *)(state) + reg_offset[regnum])
-#define CREG_ADDR(state, regnum) ((const char *)(state) + creg_offset[regnum])
\f
/* Get the whole floating-point state of THREAD and record the values
}
}
-#ifdef HAVE_SYS_PROCFS_H
-/* These two calls are used by the core-regset.c code for
- reading ELF core files. */
-void
-supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregs)
-{
- int i;
- for (i = 0; i < I386_NUM_GREGS; i++)
- regcache_raw_supply (regcache, i, CREG_ADDR (gregs, i));
-}
-
-void
-supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregs)
-{
- i387_supply_fsave (regcache, -1, fpregs);
-}
-#endif
-
/* Fetch register REGNO, or all regs if REGNO is -1. */
static void
gnu_fetch_registers (struct target_ops *ops,
}
}
+\f
+/* Support for debug registers. */
+
+#ifdef i386_DEBUG_STATE
+/* Get debug registers for thread THREAD. */
+
+static void
+i386_gnu_dr_get (struct i386_debug_state *regs, struct proc *thread)
+{
+ mach_msg_type_number_t count = i386_DEBUG_STATE_COUNT;
+ error_t err;
+
+ err = thread_get_state (thread->port, i386_DEBUG_STATE,
+ (thread_state_t) regs, &count);
+ if (err != 0 || count != i386_DEBUG_STATE_COUNT)
+ warning (_("Couldn't fetch debug state from %s"),
+ proc_string (thread));
+}
+
+/* Set debug registers for thread THREAD. */
+
+static void
+i386_gnu_dr_set (const struct i386_debug_state *regs, struct proc *thread)
+{
+ error_t err;
+
+ err = thread_set_state (thread->port, i386_DEBUG_STATE,
+ (thread_state_t) regs, i386_DEBUG_STATE_COUNT);
+ if (err != 0)
+ warning (_("Couldn't store debug state into %s"),
+ proc_string (thread));
+}
+
+/* Set DR_CONTROL in THREAD. */
+
+static void
+i386_gnu_dr_set_control_one (struct proc *thread, void *arg)
+{
+ unsigned long *control = arg;
+ struct i386_debug_state regs;
+
+ i386_gnu_dr_get (®s, thread);
+ regs.dr[DR_CONTROL] = *control;
+ i386_gnu_dr_set (®s, thread);
+}
+
+/* Set DR_CONTROL to CONTROL in all threads. */
+
+static void
+i386_gnu_dr_set_control (unsigned long control)
+{
+ inf_update_procs (gnu_current_inf);
+ inf_threads (gnu_current_inf, i386_gnu_dr_set_control_one, &control);
+}
+
+/* Parameters to set a debugging address. */
+
+struct reg_addr
+{
+ int regnum; /* Register number (zero based). */
+ CORE_ADDR addr; /* Address. */
+};
+
+/* Set address REGNUM (zero based) to ADDR in THREAD. */
+
+static void
+i386_gnu_dr_set_addr_one (struct proc *thread, void *arg)
+{
+ struct reg_addr *reg_addr = arg;
+ struct i386_debug_state regs;
+
+ i386_gnu_dr_get (®s, thread);
+ regs.dr[reg_addr->regnum] = reg_addr->addr;
+ i386_gnu_dr_set (®s, thread);
+}
+
+/* Set address REGNUM (zero based) to ADDR in all threads. */
+
+static void
+i386_gnu_dr_set_addr (int regnum, CORE_ADDR addr)
+{
+ struct reg_addr reg_addr;
+
+ gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
+
+ reg_addr.regnum = regnum;
+ reg_addr.addr = addr;
+
+ inf_update_procs (gnu_current_inf);
+ inf_threads (gnu_current_inf, i386_gnu_dr_set_addr_one, ®_addr);
+}
+
+/* Get debug register REGNUM value from only the one LWP of PTID. */
+
+static unsigned long
+i386_gnu_dr_get_reg (ptid_t ptid, int regnum)
+{
+ struct i386_debug_state regs;
+ struct proc *thread;
+
+ /* Make sure we know about new threads. */
+ inf_update_procs (gnu_current_inf);
+
+ thread = inf_tid_to_thread (gnu_current_inf, ptid_get_lwp (ptid));
+ i386_gnu_dr_get (®s, thread);
+
+ return regs.dr[regnum];
+}
+
+/* Return the inferior's debug register REGNUM. */
+
+static CORE_ADDR
+i386_gnu_dr_get_addr (int regnum)
+{
+ gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
+
+ return i386_gnu_dr_get_reg (inferior_ptid, regnum);
+}
+
+/* Get DR_STATUS from only the one thread of INFERIOR_PTID. */
+
+static unsigned long
+i386_gnu_dr_get_status (void)
+{
+ return i386_gnu_dr_get_reg (inferior_ptid, DR_STATUS);
+}
+
+/* Return the inferior's DR7 debug control register. */
+
+static unsigned long
+i386_gnu_dr_get_control (void)
+{
+ return i386_gnu_dr_get_reg (inferior_ptid, DR_CONTROL);
+}
+#endif /* i386_DEBUG_STATE */
+
/* Provide a prototype to silence -Wmissing-prototypes. */
extern initialize_file_ftype _initialize_i386gnu_nat;
/* Fill in the generic GNU/Hurd methods. */
t = gnu_target ();
+#ifdef i386_DEBUG_STATE
+ x86_use_watchpoints (t);
+
+ x86_dr_low.set_control = i386_gnu_dr_set_control;
+ gdb_assert (DR_FIRSTADDR == 0 && DR_LASTADDR < i386_DEBUG_STATE_COUNT);
+ x86_dr_low.set_addr = i386_gnu_dr_set_addr;
+ x86_dr_low.get_addr = i386_gnu_dr_get_addr;
+ x86_dr_low.get_status = i386_gnu_dr_get_status;
+ x86_dr_low.get_control = i386_gnu_dr_get_control;
+ x86_set_debug_register_length (4);
+#endif /* i386_DEBUG_STATE */
+
t->to_fetch_registers = gnu_fetch_registers;
t->to_store_registers = gnu_store_registers;
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