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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [gdb/] [sparc64nbsd-nat.c] - Blame information for rev 227

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1 227 jeremybenn
/* Native-dependent code for NetBSD/sparc64.
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   Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010
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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 3 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, see <http://www.gnu.org/licenses/>.  */
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#include "defs.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "target.h"
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#include "sparc64-tdep.h"
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#include "sparc-nat.h"
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/* NetBSD is different from the other OSes that support both SPARC and
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   UltraSPARC in that the result of ptrace(2) depends on whether the
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   traced process is 32-bit or 64-bit.  */
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static void
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sparc64nbsd_supply_gregset (const struct sparc_gregset *gregset,
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                            struct regcache *regcache,
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                            int regnum, const void *gregs)
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{
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  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
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  if (sparc32)
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    sparc32_supply_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
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  else
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    sparc64_supply_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs);
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}
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static void
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sparc64nbsd_collect_gregset (const struct sparc_gregset *gregset,
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                             const struct regcache *regcache,
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                             int regnum, void *gregs)
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{
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  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
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  if (sparc32)
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    sparc32_collect_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
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  else
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    sparc64_collect_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs);
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}
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static void
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sparc64nbsd_supply_fpregset (struct regcache *regcache,
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                             int regnum, const void *fpregs)
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{
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  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
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  if (sparc32)
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    sparc32_supply_fpregset (regcache, regnum, fpregs);
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  else
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    sparc64_supply_fpregset (regcache, regnum, fpregs);
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}
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static void
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sparc64nbsd_collect_fpregset (const struct regcache *regcache,
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                              int regnum, void *fpregs)
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{
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  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
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  if (sparc32)
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    sparc32_collect_fpregset (regcache, regnum, fpregs);
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  else
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    sparc64_collect_fpregset (regcache, regnum, fpregs);
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}
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/* Determine whether `gregset_t' contains register REGNUM.  */
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static int
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sparc64nbsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
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{
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  if (gdbarch_ptr_bit (gdbarch) == 32)
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    return sparc32_gregset_supplies_p (gdbarch, regnum);
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  /* Integer registers.  */
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  if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
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      || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
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      || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
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      || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
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    return 1;
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  /* Control registers.  */
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  if (regnum == SPARC64_PC_REGNUM
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      || regnum == SPARC64_NPC_REGNUM
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      || regnum == SPARC64_STATE_REGNUM
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      || regnum == SPARC64_Y_REGNUM)
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    return 1;
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  return 0;
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}
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/* Determine whether `fpregset_t' contains register REGNUM.  */
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static int
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sparc64nbsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
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{
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  if (gdbarch_ptr_bit (gdbarch) == 32)
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    return sparc32_fpregset_supplies_p (gdbarch, regnum);
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  /* Floating-point registers.  */
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  if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
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      || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
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    return 1;
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  /* Control registers.  */
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  if (regnum == SPARC64_FSR_REGNUM)
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    return 1;
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  return 0;
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}
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/* Support for debugging kernel virtual memory images.  */
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#include <sys/types.h>
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#include <machine/pcb.h>
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#include "bsd-kvm.h"
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static int
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sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
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{
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  u_int64_t state;
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  int regnum;
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  /* The following is true for NetBSD 1.6.2:
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     The pcb contains %sp and %pc, %pstate and %cwp.  From this
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     information we reconstruct the register state as it would look
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     when we just returned from cpu_switch().  */
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  /* The stack pointer shouldn't be zero.  */
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  if (pcb->pcb_sp == 0)
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    return 0;
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  /* If the program counter is zero, this is probably a core dump, and
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     we can get %pc from the stack.  */
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  if (pcb->pcb_pc == 0)
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      read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8),
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                  (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc);
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  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
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  regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);
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  state = pcb->pcb_pstate << 8 | pcb->pcb_cwp;
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  regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state);
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  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
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  return 1;
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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void _initialize_sparc64nbsd_nat (void);
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void
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_initialize_sparc64nbsd_nat (void)
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{
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  sparc_supply_gregset = sparc64nbsd_supply_gregset;
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  sparc_collect_gregset = sparc64nbsd_collect_gregset;
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  sparc_supply_fpregset = sparc64nbsd_supply_fpregset;
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  sparc_collect_fpregset = sparc64nbsd_collect_fpregset;
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  sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p;
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  sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p;
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  /* We've got nothing to add to the generic SPARC target.  */
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  add_target (sparc_target ());
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  /* Support debugging kernel virtual memory images.  */
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  bsd_kvm_add_target (sparc64nbsd_supply_pcb);
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}

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