/* Low level interface to i386 running the GNU Hurd.
- Copyright (C) 1992, 1995, 1996 Free Software Foundation, Inc.
+ Copyright 1992, 1995, 1996, 1998, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "inferior.h"
#include "floatformat.h"
+#include "regcache.h"
-#include <assert.h>
-#include <stdio.h>
+#include "gdb_assert.h"
#include <errno.h>
+#include <stdio.h>
#include <mach.h>
#include <mach_error.h>
#include <mach/message.h>
#include <mach/exception.h>
+#include "i386-tdep.h"
+
#include "gnu-nat.h"
+#include "i387-tdep.h"
-/* The FPU hardware state. */
-struct env387
-{
- unsigned short control;
- unsigned short r0;
- unsigned short status;
- unsigned short r1;
- unsigned short tag;
- unsigned short r2;
- unsigned long eip;
- unsigned short code_seg;
- unsigned short opcode;
- unsigned long operand;
- unsigned short operand_seg;
- unsigned short r3;
- unsigned char regs[8][10];
-};
+#ifdef HAVE_SYS_PROCFS_H
+# include <sys/procfs.h>
+# include "gregset.h"
+#endif
-\f
/* Offset to the thread_state_t location where REG is stored. */
#define REG_OFFSET(reg) offsetof (struct i386_thread_state, reg)
-/* At reg_offset[i] is the offset to the thread_state_t location where
- the gdb registers[i] is stored. */
+/* At REG_OFFSET[N] is the offset to the thread_state_t location where
+ the GDB register N is stored. */
static int reg_offset[] =
{
REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx),
{
mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT;
struct i386_float_state state;
- struct env387 *ep = (struct env387 *) state.hw_state;
error_t err;
- int i;
err = thread_get_state (thread->port, i386_FLOAT_STATE,
(thread_state_t) &state, &count);
return;
}
- if (! state.initialized)
+ if (!state.initialized)
/* The floating-point state isn't initialized. */
{
- for (i = FP0_REGNUM; i <= FP7_REGNUM; i++)
- supply_register (i, NULL);
- for (i = FIRST_FPU_CTRL_REGNUM; i <= LAST_FPU_CTRL_REGNUM; i++)
+ int i;
+
+ for (i = FP0_REGNUM; i <= FOP_REGNUM; i++)
supply_register (i, NULL);
return;
}
/* Supply the floating-point registers. */
- for (i = 0; i < 8; i++)
- supply_register (FP0_REGNUM + i, ep->regs[i]);
-
- supply_register (FCTRL_REGNUM, (char *) &ep->control);
- supply_register (FSTAT_REGNUM, (char *) &ep->status);
- supply_register (FTAG_REGNUM, (char *) &ep->tag);
- supply_register (FCOFF_REGNUM, (char *) &ep->eip);
- supply_register (FDS_REGNUM, (char *) &ep->operand_seg);
- supply_register (FDOFF_REGNUM, (char *) &ep->operand);
-
- /* Store the code segment and opcode pseudo registers. */
- {
- long l;
-
- l = ep->code_seg;
- supply_register (FCS_REGNUM, (char *) &l);
- l = ep->opcode & ((1 << 11) - 1);
- supply_register (FOP_REGNUM, (char *) &l);
- }
+ i387_supply_fsave (state.hw_state);
+}
+
+#ifdef HAVE_SYS_PROCFS_H
+/* These two calls are used by the core-regset.c code for
+ reading ELF core files. */
+void
+supply_gregset (gdb_gregset_t *gregs)
+{
+ int i;
+ for (i = 0; i < I386_NUM_GREGS; i++)
+ supply_register (i, REG_ADDR (gregs, i));
+}
+
+void
+supply_fpregset (gdb_fpregset_t *fpregs)
+{
+ i387_supply_fsave ((char *) fpregs);
}
+#endif
/* Fetch register REGNO, or all regs if REGNO is -1. */
void
/* Make sure we know about new threads. */
inf_update_procs (current_inferior);
- thread = inf_tid_to_thread (current_inferior, inferior_pid);
+ thread = inf_tid_to_thread (current_inferior, PIDGET (inferior_ptid));
if (!thread)
error ("Can't fetch registers from thread %d: No such thread",
- inferior_pid);
+ PIDGET (inferior_ptid));
- if (regno < NUM_GREGS || regno == -1)
+ if (regno < I386_NUM_GREGS || regno == -1)
{
thread_state_t state;
-
+
/* This does the dirty work for us. */
state = proc_get_state (thread, 0);
if (!state)
if (regno == -1)
{
int i;
-
+
proc_debug (thread, "fetching all register");
-
- for (i = 0; i < NUM_GREGS; i++)
+
+ for (i = 0; i < I386_NUM_GREGS; i++)
supply_register (i, REG_ADDR (state, i));
thread->fetched_regs = ~0;
}
else
{
proc_debug (thread, "fetching register %s", REGISTER_NAME (regno));
-
+
supply_register (regno, REG_ADDR (state, regno));
thread->fetched_regs |= (1 << regno);
}
}
- if (regno >= NUM_GREGS || regno == -1)
+ if (regno >= I386_NUM_GREGS || regno == -1)
{
proc_debug (thread, "fetching floating-point registers");
-
+
fetch_fpregs (thread);
}
}
-
\f
-/* Fill the i387 hardware state EP with selected data from the set of
- (pseudo) registers specified by REGS and VALID. VALID is an array
- indicating which registers in REGS are valid. If VALID is zero,
- all registers are assumed to be valid. */
-static void
-convert_to_env387 (struct env387 *ep, char *regs, signed char *valid)
-{
- int i;
-
- /* Fill in the floating-point registers. */
- for (i = 0; i < 8; i++)
- if (!valid || valid[i])
- memcpy (ep->regs[i], ®s[REGISTER_BYTE (FP0_REGNUM + i)],
- REGISTER_RAW_SIZE (FP0_REGNUM + i));
-
-#define fill(member, regno) \
- if (!valid || valid[(regno)]) \
- memcpy (&ep->member, ®s[REGISTER_BYTE (regno)], \
- sizeof (ep->member));
-
- fill (control, FCTRL_REGNUM);
- fill (status, FSTAT_REGNUM);
- fill (tag, FTAG_REGNUM);
- fill (eip, FCOFF_REGNUM);
- fill (operand, FDOFF_REGNUM);
- fill (operand_seg, FDS_REGNUM);
-
-#undef fill
-
- if (!valid || valid[FCS_REGNUM])
- ep->code_seg =
- (* (int *) ®isters[REGISTER_BYTE (FCS_REGNUM)] & 0xffff);
-
- if (!valid || valid[FOP_REGNUM])
- ep->opcode =
- ((* (int *) ®isters[REGISTER_BYTE (FOP_REGNUM)] & ((1 << 11) - 1)));
-}
/* Store the whole floating-point state into THREAD using information
from the corresponding (pseudo) registers. */
static void
-store_fpregs (struct proc *thread)
+store_fpregs (struct proc *thread, int regno)
{
mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT;
struct i386_float_state state;
return;
}
- convert_to_env387 ((struct env387 *) state.hw_state,
- registers, register_valid);
-
+ /* FIXME: kettenis/2001-07-15: Is this right? Should we somehow
+ take into account DEPRECATED_REGISTER_VALID like the old code did? */
+ i387_fill_fsave (state.hw_state, regno);
+
err = thread_set_state (thread->port, i386_FLOAT_STATE,
(thread_state_t) &state, i386_FLOAT_STATE_COUNT);
if (err)
/* Make sure we know about new threads. */
inf_update_procs (current_inferior);
- thread = inf_tid_to_thread (current_inferior, inferior_pid);
+ thread = inf_tid_to_thread (current_inferior, PIDGET (inferior_ptid));
if (!thread)
error ("Couldn't store registers into thread %d: No such thread",
- inferior_pid);
+ PIDGET (inferior_ptid));
- if (regno < NUM_GREGS || regno == -1)
+ if (regno < I386_NUM_GREGS || regno == -1)
{
thread_state_t state;
thread_state_data_t old_state;
int was_aborted = thread->aborted;
int was_valid = thread->state_valid;
+ int trace;
if (!was_aborted && was_valid)
memcpy (&old_state, &thread->state, sizeof (old_state));
return;
}
+ /* Save the T bit. We might try to restore the %eflags register
+ below, but changing the T bit would seriously confuse GDB. */
+ trace = ((struct i386_thread_state *)state)->efl & 0x100;
+
if (!was_aborted && was_valid)
/* See which registers have changed after aborting the thread. */
{
int check_regno;
- for (check_regno = 0; check_regno < NUM_GREGS; check_regno++)
+ for (check_regno = 0; check_regno < I386_NUM_GREGS; check_regno++)
if ((thread->fetched_regs & (1 << check_regno))
&& memcpy (REG_ADDR (&old_state, check_regno),
REG_ADDR (state, check_regno),
warning ("Register %s changed after the thread was aborted",
REGISTER_NAME (check_regno));
if (regno >= 0 && regno != check_regno)
- /* Update gdb's copy of the register. */
+ /* Update GDB's copy of the register. */
supply_register (check_regno, REG_ADDR (state, check_regno));
else
warning ("... also writing this register! Suspicious...");
}
#define fill(state, regno) \
- memcpy (REG_ADDR(state, regno), ®isters[REGISTER_BYTE (regno)], \
+ memcpy (REG_ADDR(state, regno), &deprecated_registers[REGISTER_BYTE (regno)], \
REGISTER_RAW_SIZE (regno))
if (regno == -1)
{
int i;
-
+
proc_debug (thread, "storing all registers");
- for (i = 0; i < NUM_GREGS; i++)
- if (register_valid[i])
+ for (i = 0; i < I386_NUM_GREGS; i++)
+ if (deprecated_register_valid[i])
fill (state, i);
}
else
{
proc_debug (thread, "storing register %s", REGISTER_NAME (regno));
- assert (register_valid[regno]);
+ gdb_assert (deprecated_register_valid[regno]);
fill (state, regno);
}
+
+ /* Restore the T bit. */
+ ((struct i386_thread_state *)state)->efl &= ~0x100;
+ ((struct i386_thread_state *)state)->efl |= trace;
}
#undef fill
- if (regno >= NUM_GREGS || regno == -1)
+ if (regno >= I386_NUM_GREGS || regno == -1)
{
proc_debug (thread, "storing floating-point registers");
-
- store_fpregs (thread);
+
+ store_fpregs (thread, regno);
}
}
projects / binutils.git / blobdiff