-/* Intel 386 native support for SYSV systems (pre-SVR4).
- Copyright (C) 1988, 89, 91, 92, 94, 96, 1998 Free Software Foundation, Inc.
+/* Intel 386 native support for System V systems (pre-SVR4).
+
+ Copyright (C) 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
+ 2000, 2002, 2007 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "language.h"
#include "gdbcore.h"
-#ifdef USG
-#include <sys/types.h>
-#endif
-
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>
-
-/* FIXME: The following used to be just "#include <sys/debugreg.h>", but
- * the the Linux 2.1.x kernel and glibc 2.0.x are not in sync; including
- * <sys/debugreg.h> will result in an error. With luck, these losers
- * will get their act together and we can trash this hack in the near future.
- * --jsm 1998-10-21
- */
-
#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
-#ifdef HAVE_ASM_DEBUGREG_H
-#include <asm/debugreg.h>
-#else
#include <sys/debugreg.h>
#endif
-#endif
#include <sys/file.h>
#include "gdb_stat.h"
#include "floatformat.h"
#include "target.h"
+
+#include "i386-tdep.h"
\f
-/* this table must line up with REGISTER_NAMES in tm-i386v.h */
-/* symbols like 'EAX' come from <sys/reg.h> */
+/* Mapping between the general-purpose registers in `struct user'
+ format and GDB's register array layout. */
static int regmap[] =
{
EAX, ECX, EDX, EBX,
DS, ES, FS, GS,
};
-/* blockend is the value of u.u_ar0, and points to the
- * place where GS is stored
- */
+/* Support for the user struct. */
-int
-i386_register_u_addr (blockend, regnum)
- int blockend;
- int regnum;
+/* Return the address of register REGNUM. BLOCKEND is the value of
+ u.u_ar0, and points to the place where GS is stored. */
+
+CORE_ADDR
+register_u_addr (CORE_ADDR blockend, int regnum)
{
struct user u;
- int fpstate;
- int ubase;
+ CORE_ADDR fpstate;
- ubase = blockend;
- /* FIXME: Should have better way to test floating point range */
- if (regnum >= FP0_REGNUM && regnum <= (FP0_REGNUM + 7))
+ if (i386_fp_regnum_p (regnum))
{
-#ifdef KSTKSZ /* SCO, and others? */
- ubase += 4 * (SS + 1) - KSTKSZ;
- fpstate = ubase + ((char *) &u.u_fps.u_fpstate - (char *) &u);
+#ifdef KSTKSZ /* SCO, and others? */
+ blockend += 4 * (SS + 1) - KSTKSZ;
+ fpstate = blockend + ((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 = blockend + ((char *) &u.i387.st_space - (char *) &u);
return (fpstate + 10 * (regnum - FP0_REGNUM));
#endif
}
- else
- {
- return (ubase + 4 * regmap[regnum]);
- }
+ return (blockend + 4 * regmap[regnum]);
}
-\f
+
+/* Return the size of the user struct. */
+
int
-kernel_u_size ()
+kernel_u_size (void)
{
return (sizeof (struct user));
}
/* Record which address associates with which register. */
static CORE_ADDR address_lookup[DR_LASTADDR - DR_FIRSTADDR + 1];
-static int
-i386_insert_aligned_watchpoint PARAMS ((int, CORE_ADDR, CORE_ADDR, int,
- int));
+static int i386_insert_aligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int,
+ int);
-static int
-i386_insert_nonaligned_watchpoint PARAMS ((int, CORE_ADDR, CORE_ADDR, int,
- int));
+static int i386_insert_nonaligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int,
+ int);
/* Insert a watchpoint. */
int
-i386_insert_watchpoint (pid, addr, len, rw)
- int pid;
- CORE_ADDR addr;
- int len;
- int rw;
+i386_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw)
{
return i386_insert_aligned_watchpoint (pid, addr, addr, len, rw);
}
static int
-i386_insert_aligned_watchpoint (pid, waddr, addr, len, rw)
- int pid;
- CORE_ADDR waddr;
- CORE_ADDR addr;
- int len;
- int rw;
+i386_insert_aligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr,
+ int len, int rw)
{
int i;
int read_write_bits, len_bits;
}
static int
-i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw)
- int pid;
- CORE_ADDR waddr;
- CORE_ADDR addr;
- int len;
- int rw;
+i386_insert_nonaligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr,
+ int len, int rw)
{
int align;
int size;
int rv;
- static int size_try_array[16] =
+ 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 */
+ { 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 = (len > 4) ? 3 : len - 1;
- size = size_try_array[size * 4 + align];
+ size = size_try_array[len > 4 ? 3 : len - 1][align];
rv = i386_insert_aligned_watchpoint (pid, waddr, addr, size, rw);
if (rv)
/* Remove a watchpoint. */
int
-i386_remove_watchpoint (pid, addr, len)
- int pid;
- CORE_ADDR addr;
- int len;
+i386_remove_watchpoint (int pid, CORE_ADDR addr, int len)
{
int i;
int register_number;
/* Check if stopped by a watchpoint. */
CORE_ADDR
-i386_stopped_by_watchpoint (pid)
- int pid;
+i386_stopped_by_watchpoint (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 */
projects / deliverable / binutils-gdb.git / blobdiff