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e771a87134
(fill_gregset): Use regcache_collect. (fill_fpregset): Likewise. (fetch_inferior_registers): Only fetch integer registers if requested to do so. (store_inferior_registers): Only store integer registers if requested to do so.
212 lines
5.3 KiB
C
212 lines
5.3 KiB
C
/* Native-dependent code for Alpha BSD's.
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Copyright 2000, 2001, 2002 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 "inferior.h"
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#include "regcache.h"
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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#endif
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#ifndef HAVE_GREGSET_T
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typedef struct reg gregset_t;
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#endif
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#ifndef HAVE_FPREGSET_T
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typedef struct fpreg fpregset_t;
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#endif
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#include "gregset.h"
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/* Number of general-purpose registers. */
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#define NUM_GREGS 32
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/* Number of floating point registers. */
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#define NUM_FPREGS 31
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/* Transfering the registers between GDB, inferiors and core files. */
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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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int i;
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for (i = 0; i < NUM_GREGS; i++)
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{
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if (CANNOT_FETCH_REGISTER (i))
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supply_register (i, NULL);
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else
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supply_register (i, (char *) &gregsetp->r_regs[i]);
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}
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/* The PC travels in the R_ZERO slot. */
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supply_register (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
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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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int i;
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for (i = 0; i < NUM_GREGS; i++)
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if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
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regcache_collect (i, (char *) &gregsetp->r_regs[i]);
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/* The PC travels in the R_ZERO slot. */
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if (regno == -1 || regno == PC_REGNUM)
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regcache_collect (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
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}
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/* Fill GDB's register array with the floating-point register values
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in *FPREGSETP. */
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void
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supply_fpregset (fpregset_t *fpregsetp)
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{
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int i;
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for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
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{
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if (CANNOT_FETCH_REGISTER (i))
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supply_register (i, NULL);
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else
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supply_register (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]);
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}
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supply_register (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
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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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int i;
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for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
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if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
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regcache_collect (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]);
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if (regno == -1 || regno == FPCR_REGNUM)
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regcache_collect (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
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}
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/* Determine if PT_GETREGS fetches this register. */
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static int
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getregs_supplies (int regno)
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{
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return ((regno >= V0_REGNUM && regno <= ZERO_REGNUM)
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|| regno >= PC_REGNUM);
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}
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/* Fetch register REGNO from the inferior. If REGNO is -1, do this
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for all registers (including the floating point registers). */
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void
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fetch_inferior_registers (int regno)
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{
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if (regno == -1 || getregs_supplies (regno))
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{
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gregset_t gregs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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perror_with_name ("Couldn't get registers");
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supply_gregset (&gregs);
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if (regno != -1)
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return;
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}
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if (regno == -1 || regno >= FP0_REGNUM)
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{
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fpregset_t fpregs;
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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supply_fpregset (&fpregs);
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}
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/* Reset virtual frame pointer. */
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supply_register (FP_REGNUM, NULL);
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}
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/* Store register REGNO back into the inferior. If REGNO is -1, do
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this for all registers (including the floating point registers). */
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void
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store_inferior_registers (int regno)
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{
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if (regno == -1 || getregs_supplies (regno))
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{
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gregset_t gregs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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perror_with_name ("Couldn't get registers");
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fill_gregset (&gregs, regno);
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if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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perror_with_name ("Couldn't write registers");
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if (regno != -1)
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return;
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}
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if (regno == -1 || regno >= FP0_REGNUM)
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{
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fpregset_t fpregs;
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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fill_fpregset (&fpregs, regno);
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if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't write floating point status");
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}
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}
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