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1181 |
sfurman |
/* Native-dependent code for SPARC systems running NetBSD.
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Copyright 2002 Free Software Foundation, Inc.
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Contributed by Wasabi Systems, 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 "sparcnbsd-tdep.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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/* NOTE: We don't bother with any of the deferred_store nonsense; it
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makes things a lot more complicated than they need to be. */
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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 == PS_REGNUM
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|| regno == PC_REGNUM
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|| regno == NPC_REGNUM
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|| regno == Y_REGNUM
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|| (regno >= G0_REGNUM && regno <= G7_REGNUM)
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|| (regno >= O0_REGNUM && regno <= O7_REGNUM)
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/* stack regs (handled by sparcnbsd_supply_reg) */
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|| (regno >= L0_REGNUM && regno <= I7_REGNUM));
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}
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/* Determine if PT_GETFPREGS fetches this register. */
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static int
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getfpregs_supplies (int regno)
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{
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return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 31))
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|| regno == FPS_REGNUM);
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}
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void
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fetch_inferior_registers (int regno)
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{
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/* We don't use deferred stores. */
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if (deferred_stores)
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internal_error (__FILE__, __LINE__,
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"fetch_inferior_registers: deferred stores pending");
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if (regno == -1 || getregs_supplies (regno))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't get registers");
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sparcnbsd_supply_reg32 ((char *) ®s, regno);
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if (regno != -1)
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return;
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}
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if (regno == -1 || getfpregs_supplies (regno))
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{
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struct fpreg 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 registers");
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sparcnbsd_supply_fpreg32 ((char *) &fpregs, regno);
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if (regno != -1)
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return;
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}
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}
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void
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store_inferior_registers (int regno)
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{
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/* We don't use deferred stores. */
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if (deferred_stores)
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internal_error (__FILE__, __LINE__,
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"store_inferior_registers: deferred stores pending");
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if (regno == -1 || getregs_supplies (regno))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't get registers");
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sparcnbsd_fill_reg32 ((char *) ®s, regno);
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if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't write registers");
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/* Deal with the stack regs. */
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if (regno == -1 || regno == SP_REGNUM
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|| (regno >= L0_REGNUM && regno <= I7_REGNUM))
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{
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CORE_ADDR sp = read_register (SP_REGNUM);
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int i;
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char buf[4];
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for (i = L0_REGNUM; i <= I7_REGNUM; i++)
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{
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if (regno == -1 || regno == SP_REGNUM || regno == i)
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{
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regcache_collect (i, buf);
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target_write_memory (sp + ((i - L0_REGNUM) * 4),
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buf, sizeof (buf));
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}
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}
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}
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if (regno != -1)
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return;
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}
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if (regno == -1 || getfpregs_supplies (regno))
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{
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struct fpreg 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 registers");
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sparcnbsd_fill_fpreg32 ((char *) &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 registers");
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if (regno != -1)
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return;
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}
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}
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