-/* Native-dependent code for SVR4 Unix running on i386's, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1996, 1997, 1998, 1999, 2000, 2001
- Free Software Foundation, Inc.
+/* Native-dependent code for Unix SVR4 running on i386's.
+
+ Copyright (C) 1988, 1989, 1991, 1992, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "value.h"
#include <sys/reg.h>
#endif
+#include "i386-tdep.h"
+#include "i387-tdep.h"
#ifdef HAVE_SYS_PROCFS_H
#include <sys/procfs.h>
-/* Prototypes for supply_gregset etc. */
+/* We must not compile this code for 64-bit Solaris x86. */
+#if !defined (PR_MODEL_NATIVE) || (PR_MODEL_NATIVE == PR_MODEL_ILP32)
+
#include "gregset.h"
-/* The /proc interface divides the target machine's register set up into
- two different sets, the general register set (gregset) and the floating
- point register set (fpregset). For each set, there is an ioctl to get
- the current register set and another ioctl to set the current values.
+/* The `/proc' interface divides the target machine's register set up
+ into two different sets, the general purpose register set (gregset)
+ and the floating-point register set (fpregset). For each set,
+ there is an ioctl to get the current register set and another ioctl
+ to set the current values.
- The actual structure passed through the ioctl interface is, of course,
- naturally machine dependent, and is different for each set of registers.
- For the i386 for example, the general register set is typically defined
- by:
+ The actual structure passed through the ioctl interface is, of
+ course, naturally machine dependent, and is different for each set
+ of registers. For the i386 for example, the general-purpose
+ register set is typically defined by:
typedef int gregset_t[19]; (in <sys/regset.h>)
#define UESP 17
#define SS 18
- and the floating point set by:
-
- typedef struct fpregset
- {
- union
- {
- struct fpchip_state // fp extension state //
- {
- int state[27]; // 287/387 saved state //
- int status; // status word saved at exception //
- } fpchip_state;
- struct fp_emul_space // for emulators //
- {
- char fp_emul[246];
- char fp_epad[2];
- } fp_emul_space;
- int f_fpregs[62]; // union of the above //
- } fp_reg_set;
- long f_wregs[33]; // saved weitek state //
+ and the floating-point set by:
+
+ typedef struct fpregset {
+ union {
+ struct fpchip_state // fp extension state //
+ {
+ int state[27]; // 287/387 saved state //
+ int status; // status word saved at //
+ // exception //
+ } fpchip_state;
+ struct fp_emul_space // for emulators //
+ {
+ char fp_emul[246];
+ char fp_epad[2];
+ } fp_emul_space;
+ int f_fpregs[62]; // union of the above //
+ } fp_reg_set;
+ long f_wregs[33]; // saved weitek state //
} fpregset_t;
- These routines provide the packing and unpacking of gregset_t and
- fpregset_t formatted data.
+ Incidentally fpchip_state contains the FPU state in the same format
+ as used by the "fsave" instruction, and that's the only thing we
+ support here. I don't know how the emulator stores it state. The
+ Weitek stuff definitely isn't supported.
- */
+ The routines defined here, provide the packing and unpacking of
+ gregset_t and fpregset_t formatted data. */
#ifdef HAVE_GREGSET_T
-/* This is a duplicate of the table in i386-xdep.c. */
-
+/* Mapping between the general-purpose registers in `/proc'
+ format and GDB's register array layout. */
static int regmap[] =
{
EAX, ECX, EDX, EBX,
UESP, EBP, ESI, EDI,
EIP, EFL, CS, SS,
- DS, ES, FS, GS,
+ DS, ES, FS, GS
};
-/* Prototypes for local functions */
-
-void fill_gregset (gregset_t *, int);
-
-void supply_gregset (gregset_t *);
-
-void supply_fpregset (fpregset_t *);
-
-void fill_fpregset (fpregset_t *, int);
-
-
-/* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
- being less than or equal to the number of registers that can be stored
- in a gregset_t. Note that with the current scheme there will typically
- be more registers actually stored in a gregset_t that what we know
- about. This is bogus and should be fixed. */
-
-/* Given a pointer to a general register set in /proc format (gregset_t *),
- unpack the register contents and supply them as gdb's idea of the current
- register values. */
+/* Fill GDB's register array with the general-purpose register values
+ in *GREGSETP. */
void
-supply_gregset (gregset_t *gregsetp)
+supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
{
- register int regi;
- register greg_t *regp = (greg_t *) gregsetp;
- extern int regmap[];
-
- for (regi = 0; regi < (NUM_REGS - NUM_FREGS); regi++)
- {
- supply_register (regi, (char *) (regp + regmap[regi]));
- }
+ const greg_t *regp = (const greg_t *) gregsetp;
+ int regnum;
+
+ for (regnum = 0; regnum < I386_NUM_GREGS; regnum++)
+ regcache_raw_supply (regcache, regnum, regp + regmap[regnum]);
}
+/* Fill register REGNUM (if it is a general-purpose register) in
+ *GREGSETPS with the value in GDB's register array. If REGNUM is -1,
+ do this for all registers. */
+
void
-fill_gregset (gregset_t *gregsetp, int regno)
+fill_gregset (const struct regcache *regcache,
+ gregset_t *gregsetp, int regnum)
{
- int regi;
- register greg_t *regp = (greg_t *) gregsetp;
- extern int regmap[];
-
- for (regi = 0; regi < (NUM_REGS - NUM_FREGS); regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- *(regp + regmap[regi]) = *(int *) ®isters[REGISTER_BYTE (regi)];
- }
- }
+ greg_t *regp = (greg_t *) gregsetp;
+ int i;
+
+ for (i = 0; i < I386_NUM_GREGS; i++)
+ if (regnum == -1 || regnum == i)
+ regcache_raw_collect (regcache, i, regp + regmap[i]);
}
#endif /* HAVE_GREGSET_T */
-#if defined (HAVE_FPREGSET_T)
-
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), unpack the register contents and supply them as gdb's
- idea of the current floating point register values. */
+#ifdef HAVE_FPREGSET_T
-/* FIXME: Assumes that fpregsetp contains an i387 FSAVE area. */
-static const int freg_offset_map[] =
-{
-#if !defined(FPREGSET_FSAVE_OFFSET)
-#define FPREGSET_FSAVE_OFFSET 0
-#endif
- FPREGSET_FSAVE_OFFSET + 28 + 0 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 1 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 2 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 3 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 4 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 5 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 6 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 7 * 10,
- FPREGSET_FSAVE_OFFSET + 0,
- FPREGSET_FSAVE_OFFSET + 4,
- FPREGSET_FSAVE_OFFSET + 8,
- FPREGSET_FSAVE_OFFSET + 16,
- FPREGSET_FSAVE_OFFSET + 12,
- FPREGSET_FSAVE_OFFSET + 24,
- FPREGSET_FSAVE_OFFSET + 20,
- FPREGSET_FSAVE_OFFSET + 16
-};
+/* Fill GDB's register array with the floating-point register values in
+ *FPREGSETP. */
void
-supply_fpregset (fpregset_t *fpregsetp)
+supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
{
- int regi;
-
- if (NUM_FREGS == 0)
+ if (gdbarch_fp0_regnum (get_regcache_arch (regcache)) == 0)
return;
- for (regi = FP0_REGNUM; regi <= LAST_FPU_CTRL_REGNUM; regi++)
- {
- char tbuf[4];
- ULONGEST tval;
- char *from = (char *) fpregsetp + freg_offset_map[regi - FP0_REGNUM];
-
- if (regi == FCS_REGNUM)
- {
- tval = extract_unsigned_integer (from, 4) & 0xffff;
- store_unsigned_integer (tbuf, 4, tval);
- supply_register (regi, tbuf);
- }
- else if (regi == FOP_REGNUM)
- {
- tval = (extract_unsigned_integer (from, 4) >> 16) & ((1 << 11) - 1);
- store_unsigned_integer (tbuf, 4, tval);
- supply_register (regi, tbuf);
- }
- else
- supply_register (regi, from);
- }
+
+ i387_supply_fsave (regcache, -1, fpregsetp);
}
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), update the register specified by REGNO from gdb's idea
- of the current floating point register set. If REGNO is -1, update
- them all. */
+/* Fill register REGNO (if it is a floating-point register) in
+ *FPREGSETP with the value in GDB's register array. If REGNO is -1,
+ do this for all registers. */
void
-fill_fpregset (fpregset_t *fpregsetp, int regno)
+fill_fpregset (const struct regcache *regcache,
+ fpregset_t *fpregsetp, int regno)
{
- int regi;
-
- if (NUM_FREGS == 0)
+ if (gdbarch_fp0_regnum (get_regcache_arch (regcache)) == 0)
return;
- for (regi = FP0_REGNUM; regi <= LAST_FPU_CTRL_REGNUM; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- char *to = (char *) fpregsetp + freg_offset_map[regi - FP0_REGNUM];
- char *from = (char *) ®isters[REGISTER_BYTE (regi)];
- ULONGEST valto;
- ULONGEST valfrom;
-
- if (regi == FCS_REGNUM)
- {
- valto = extract_unsigned_integer (to, 4);
- valfrom = extract_unsigned_integer (from, 4);
- valto = (valto & ~0xffff) | (valfrom & 0xffff);
- store_unsigned_integer (to, 4, valto);
- }
- else if (regi == FOP_REGNUM)
- {
- valto = extract_unsigned_integer (to, 4);
- valfrom = extract_unsigned_integer (from, 4);
- valto = (valto & 0xffff) | ((valfrom & ((1 << 11) - 1)) << 16);
- store_unsigned_integer (to, 4, valto);
- }
- else
- {
- memcpy (to, from, REGISTER_RAW_SIZE (regi));
- }
- }
- }
+
+ i387_collect_fsave (regcache, regno, fpregsetp);
}
-#endif /* defined (HAVE_FPREGSET_T) */
+#endif /* HAVE_FPREGSET_T */
+
+#endif /* not 64-bit. */
#endif /* HAVE_SYS_PROCFS_H */
projects / external / binutils.git / blobdiff