128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/* Native-dependent code for OpenBSD/sparc64.
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Copyright (C) 2003-2018 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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#include "obsd-nat.h"
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/* Determine whether `gregset_t' contains register REGNUM. */
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static int
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sparc64obsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
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{
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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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sparc64obsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
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{
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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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sparc64obsd_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 OpenBSD 3.0:
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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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void
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_initialize_sparc64obsd_nat (void)
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{
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sparc_supply_gregset = sparc64_supply_gregset;
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sparc_collect_gregset = sparc64_collect_gregset;
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sparc_supply_fpregset = sparc64_supply_fpregset;
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sparc_collect_fpregset = sparc64_collect_fpregset;
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sparc_gregset_supplies_p = sparc64obsd_gregset_supplies_p;
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sparc_fpregset_supplies_p = sparc64obsd_fpregset_supplies_p;
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sparc_gregmap = &sparc64nbsd_gregmap;
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sparc_fpregmap = &sparc64_bsd_fpregmap;
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/* Add some extra features to the generic SPARC target. */
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obsd_add_target (sparc_target ());
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/* Support debugging kernel virtual memory images. */
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bsd_kvm_add_target (sparc64obsd_supply_pcb);
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}
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