fcc9bf0139
comments. (fill_gregset, supply_gregset, supply_fpregset, fill_fpregset): Remove prototypes. (supply_gregset, fill_gregset): Remove use of register keyword and remove declaration for regmap. Use I386_NUM_GREGS instead of NUM_REGS and NUM_FREGS. (FPREGSET_FSAVE_OFFSET): Remove. (supply_fpregset, fill_fpregset): Use FPO_REGNUM instead of NUM_FREGS to determine whether the floating-point registers are available.
160 lines
4.6 KiB
C
160 lines
4.6 KiB
C
/* Native-dependent code for SVR4 Unix running on i386's.
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Copyright 1988, 1989, 1991, 1992, 1996, 1997, 1998, 1999, 2000,
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2001, 2002
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "value.h"
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#include "inferior.h"
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#include "regcache.h"
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#endif
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#include "i386-tdep.h"
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#include "i387-tdep.h"
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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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/* The `/proc' interface divides the target machine's register set up
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into two different sets, the general purpose register set (gregset)
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and the floating-point register set (fpregset). For each set,
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there is an ioctl to get the current register set and another ioctl
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to set the current values.
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The actual structure passed through the ioctl interface is, of
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course, naturally machine dependent, and is different for each set
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of registers. For the i386 for example, the general-purpose
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register set is typically defined by:
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typedef int gregset_t[19]; (in <sys/regset.h>)
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#define GS 0 (in <sys/reg.h>)
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#define FS 1
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...
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#define UESP 17
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#define SS 18
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and the floating-point set by:
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typedef struct fpregset {
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union {
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struct fpchip_state // fp extension state //
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{
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int state[27]; // 287/387 saved state //
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int status; // status word saved at //
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// exception //
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} fpchip_state;
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struct fp_emul_space // for emulators //
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{
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char fp_emul[246];
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char fp_epad[2];
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} fp_emul_space;
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int f_fpregs[62]; // union of the above //
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} fp_reg_set;
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long f_wregs[33]; // saved weitek state //
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} fpregset_t;
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Incidentally fpchip_state contains the FPU state in the same format
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as used by the "fsave" instruction, and that's the only thing we
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support here. I don't know how the emulator stores it state. The
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Weitek stuff definitely isn't supported.
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The routines defined here, provide the packing and unpacking of
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gregset_t and fpregset_t formatted data. */
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#ifdef HAVE_GREGSET_T
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/* Mapping between the general-purpose registers in `/proc'
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format and GDB's register array layout. */
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static int regmap[] =
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{
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EAX, ECX, EDX, EBX,
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UESP, EBP, ESI, EDI,
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EIP, EFL, CS, SS,
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DS, ES, FS, GS,
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};
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/* Fill GDB's register array with the general-purpose register values
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in *GREGSETP. */
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void
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supply_gregset (gregset_t *gregsetp)
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{
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greg_t *regp = (greg_t *) gregsetp;
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int i;
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for (i = 0; i < I386_NUM_GREGS; i++)
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supply_register (i, (char *) (regp + regmap[i]));
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}
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/* Fill register REGNO (if it is a general-purpose register) in
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*GREGSETPS with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_gregset (gregset_t *gregsetp, int regno)
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{
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greg_t *regp = (greg_t *) gregsetp;
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int i;
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for (i = 0; i < I386_NUM_GREGS; i++)
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if (regno == -1 || regno == i)
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regcache_collect (i, regp + regmap[i]);
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}
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#endif /* HAVE_GREGSET_T */
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#ifdef HAVE_FPREGSET_T
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/* Fill GDB's register array with the floating-point register values in
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*FPREGSETP. */
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void
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supply_fpregset (fpregset_t *fpregsetp)
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{
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if (FP0_REGNUM == 0)
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return;
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i387_supply_fsave ((char *) fpregsetp);
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}
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/* Fill register REGNO (if it is a floating-point register) in
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*FPREGSETP with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_fpregset (fpregset_t *fpregsetp, int regno)
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{
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if (FP0_REGNUM == 0)
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return;
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i387_fill_fsave ((char *) fpregsetp, regno);
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}
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#endif /* HAVE_FPREGSET_T */
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#endif /* HAVE_SYS_PROCFS_H */
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