/* Intel 386 native support for SYSV systems (pre-SVR4).
Copyright (C) 1988, 89, 91, 92, 94, 96, 1998 Free Software Foundation, Inc.
- This file is part of GDB.
+This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#ifdef HAVE_PTRACE_H
-#include <ptrace.h>
#else
-#ifdef HAVE_SYS_PTRACE_H
-#include <sys/ptrace.h>
-#endif
+# ifdef HAVE_SYS_PTRACE_H
+# include <sys/ptrace.h>
+# endif
#endif
#include "frame.h"
*/
#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
-#ifdef HAVE_ASM_DEBUGREG_H
-#include <asm/debugreg.h>
-#else
-#include <sys/debugreg.h>
-#endif
+# ifdef HAVE_ASM_DEBUGREG_H
+#
include <asm/debugreg.h>
+# else
+# include <sys/debugreg.h>
+# endif
#endif
#include <sys/file.h>
#include "floatformat.h"
#include "target.h"
-\f
+\f
/* this table must line up with REGISTER_NAMES in tm-i386v.h */
/* symbols like 'EAX' come from <sys/reg.h> */
-static int regmap[] =
+static int regmap[] =
{
EAX, ECX, EDX, EBX,
UESP, EBP, ESI, EDI,
ubase = blockend;
/* FIXME: Should have better way to test floating point range */
- if (regnum >= FP0_REGNUM && regnum <= (FP0_REGNUM + 7))
+ if (regnum >= FP0_REGNUM && regnum <= (FP0_REGNUM + 7))
{
-#ifdef KSTKSZ /* SCO, and others? */
+#ifdef KSTKSZ /* SCO, and others? */
ubase += 4 * (SS + 1) - KSTKSZ;
- fpstate = ubase + ((char *) &u.u_fps.u_fpstate - (char *) &u);
+ fpstate = ubase + ((char *)&u.u_fps.u_fpstate - (char *)&u);
return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));
#else
- fpstate = ubase + ((char *) &u.i387.st_space - (char *) &u);
+ fpstate = ubase + ((char *)&u.i387.st_space - (char *)&u);
return (fpstate + 10 * (regnum - FP0_REGNUM));
#endif
- }
+ }
else
{
return (ubase + 4 * regmap[regnum]);
}
-
+
}
\f
int
static int
i386_insert_aligned_watchpoint PARAMS ((int, CORE_ADDR, CORE_ADDR, int,
- int));
+ int));
static int
i386_insert_nonaligned_watchpoint PARAMS ((int, CORE_ADDR, CORE_ADDR, int,
int read_write_bits, len_bits;
int free_debug_register;
int register_number;
-
+
/* Look for a free debug register. */
for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
{
}
else
return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw);
-
+
free_debug_register = i;
register_number = free_debug_register - DR_FIRSTADDR;
debug_control_mirror |=
(1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * register_number));
debug_control_mirror |= DR_LOCAL_SLOWDOWN;
debug_control_mirror &= ~DR_CONTROL_RESERVED;
-
+
ptrace (6, pid, offsetof (struct user, u_debugreg[DR_CONTROL]),
debug_control_mirror);
ptrace (6, pid, offsetof (struct user, u_debugreg[free_debug_register]),
int size;
int rv;
- static int size_try_array[4][4] =
- {
- { 1, 1, 1, 1 }, /* trying size one */
- { 2, 1, 2, 1 }, /* trying size two */
- { 2, 1, 2, 1 }, /* trying size three */
- { 4, 1, 2, 1 } /* trying size four */
+ static int size_try_array[16] = {
+ 1, 1, 1, 1, /* trying size one */
+ 2, 1, 2, 1, /* trying size two */
+ 2, 1, 2, 1, /* trying size three */
+ 4, 1, 2, 1 /* trying size four */
};
rv = 0;
{
align = addr % 4;
/* Four is the maximum length for 386. */
- size = size_try_array[len > 4 ? 3 : len - 1][align];
+ size = (len > 4) ? 3 : len - 1;
+ size = size_try_array[size * 4 + align];
rv = i386_insert_aligned_watchpoint (pid, waddr, addr, size, rw);
if (rv)
CORE_ADDR
i386_stopped_by_watchpoint (pid)
- int pid;
+ int pid;
{
int i;
int status;
}
#endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
+
+#if 0
+/* using FLOAT_INFO as is would be a problem. FLOAT_INFO is called
+ via a command xxx and eventually calls ptrace without ever having
+ traversed the target vector. This would be terribly impolite
+ behaviour for a sun4 hosted remote gdb.
+
+ A fix might be to move this code into the "info registers" command.
+ rich@cygnus.com 15 Sept 92. */
+i386_float_info ()
+{
+ struct user u; /* just for address computations */
+ int i;
+ /* fpstate defined in <sys/user.h> */
+ struct fpstate *fpstatep;
+ char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
+ unsigned int uaddr;
+ char fpvalid = 0;
+ unsigned int rounded_addr;
+ unsigned int rounded_size;
+ extern int corechan;
+ int skip;
+
+ uaddr = (char *)&u.u_fpvalid - (char *)&u;
+ if (target_has_execution)
+ {
+ unsigned int data;
+ unsigned int mask;
+
+ rounded_addr = uaddr & -sizeof (int);
+ data = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) rounded_addr, 0);
+ mask = 0xff << ((uaddr - rounded_addr) * 8);
+
+ fpvalid = ((data & mask) != 0);
+ }
+#if 0
+ else
+ {
+ if (lseek (corechan, uaddr, 0) < 0)
+ perror ("seek on core file");
+ if (myread (corechan, &fpvalid, 1) < 0)
+ perror ("read on core file");
+
+ }
+#endif /* no core support yet */
+
+ if (fpvalid == 0)
+ {
+ printf_unfiltered ("no floating point status saved\n");
+ return;
+ }
+
+ uaddr = (char *)&U_FPSTATE(u) - (char *)&u;
+ if (target_has_execution)
+ {
+ int *ip;
+
+ rounded_addr = uaddr & -sizeof (int);
+ rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) +
+ sizeof (int) - 1) / sizeof (int);
+ skip = uaddr - rounded_addr;
+
+ ip = (int *)buf;
+ for (i = 0; i < rounded_size; i++)
+ {
+ *ip++ = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) rounded_addr, 0);
+ rounded_addr += sizeof (int);
+ }
+ }
+#if 0
+ else
+ {
+ if (lseek (corechan, uaddr, 0) < 0)
+ perror_with_name ("seek on core file");
+ if (myread (corechan, buf, sizeof (struct fpstate)) < 0)
+ perror_with_name ("read from core file");
+ skip = 0;
+ }
+#endif /* 0 */
+
+ fpstatep = (struct fpstate *)(buf + skip);
+ print_387_status (fpstatep->status, (struct env387 *)fpstatep->state);
+}
+
+#endif /* never */
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