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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/i386v4-nat.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
Diffstat (limited to 'gdb/i386v4-nat.c')
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diff --git a/gdb/i386v4-nat.c b/gdb/i386v4-nat.c
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-/* Native-dependent code for SVR4 Unix running on i386's, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1996, 1998 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
-(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.
-
-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"
-#include "value.h"
-
-#ifdef HAVE_SYS_REG_H
-#include <sys/reg.h>
-#endif
-
-
-#ifdef HAVE_SYS_PROCFS_H
-
-#include <sys/procfs.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 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:
-
- typedef int gregset_t[19]; (in <sys/regset.h>)
-
- #define GS 0 (in <sys/reg.h>)
- #define FS 1
- ...
- #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 //
- } fpregset_t;
-
- These routines 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. */
-
-static int regmap[] =
-{
- EAX, ECX, EDX, EBX,
- UESP, EBP, ESI, EDI,
- EIP, EFL, CS, SS,
- DS, ES, FS, GS,
-};
-
-/* Prototypes for local functions */
-
-void fill_gregset PARAMS ((gregset_t *, int));
-
-void supply_gregset PARAMS ((gregset_t *));
-
-void supply_fpregset PARAMS ((fpregset_t *));
-
-void fill_fpregset PARAMS ((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. */
-
-void
-supply_gregset (gregsetp)
- 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]));
- }
-}
-
-void
-fill_gregset (gregsetp, regno)
- gregset_t *gregsetp;
- int regno;
-{
- int regi;
- register greg_t *regp = (greg_t *) gregsetp;
- extern char registers[];
- extern int regmap[];
-
- for (regi = 0 ; regi < (NUM_REGS - NUM_FREGS) ; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- *(regp + regmap[regi]) = *(int *) &registers[REGISTER_BYTE (regi)];
- }
- }
-}
-
-#endif /* HAVE_GREGSET_T */
-
-#if defined (FP0_REGNUM) && 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. */
-
-void
-supply_fpregset (fpregsetp)
- fpregset_t *fpregsetp;
-{
- /* FIXME: see m68k-tdep.c for an example, for the m68k. */
-}
-
-/* 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. */
-
-void
-fill_fpregset (fpregsetp, regno)
- fpregset_t *fpregsetp;
- int regno;
-{
- /* FIXME: see m68k-tdep.c for an example, for the m68k. */
-}
-
-#endif /* defined (FP0_REGNUM) && defined (HAVE_FPREGSET_T) */
-
-#endif /* HAVE_SYS_PROCFS_H */