-/* Native-dependent code for SPARC systems running NetBSD.
- Copyright 2002, 2003 Free Software Foundation, Inc.
- Contributed by Wasabi Systems, Inc.
+/* Native-dependent code for NetBSD/sparc.
+
+ Copyright (C) 2002, 2003, 2004, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "inferior.h"
#include "regcache.h"
+#include "target.h"
#include "sparc-tdep.h"
-#include "sparcnbsd-tdep.h"
+#include "sparc-nat.h"
+
+/* Support for debugging kernel virtual memory images. */
#include <sys/types.h>
-#include <sys/ptrace.h>
-#include <machine/reg.h>
+#include <machine/pcb.h>
-/* NOTE: We don't bother with any of the deferred_store nonsense; it
- makes things a lot more complicated than they need to be. */
+#include "bsd-kvm.h"
-/* Determine if PT_GETREGS fetches this register. */
static int
-getregs_supplies (int regno)
+sparc32nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
- return (regno == PS_REGNUM
- || regno == PC_REGNUM
- || regno == DEPRECATED_NPC_REGNUM
- || regno == Y_REGNUM
- || (regno >= G0_REGNUM && regno <= G7_REGNUM)
- || (regno >= O0_REGNUM && regno <= O7_REGNUM)
- /* stack regs (handled by sparcnbsd_supply_reg) */
- || (regno >= L0_REGNUM && regno <= I7_REGNUM));
-}
+ /* The following is true for NetBSD 1.6.2:
-/* Determine if PT_GETFPREGS fetches this register. */
-static int
-getfpregs_supplies (int regno)
-{
- return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 31))
- || regno == FPS_REGNUM);
-}
+ The pcb contains %sp, %pc, %psr and %wim. From this information
+ we reconstruct the register state as it would look when we just
+ returned from cpu_switch(). */
-void
-fetch_inferior_registers (int regno)
-{
- /* We don't use deferred stores. */
- if (deferred_stores)
- internal_error (__FILE__, __LINE__,
- "fetch_inferior_registers: deferred stores pending");
-
- if (regno == -1 || getregs_supplies (regno))
- {
- struct reg regs;
-
- if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) ®s, 0) == -1)
- perror_with_name ("Couldn't get registers");
-
- sparcnbsd_supply_reg32 ((char *) ®s, regno);
- if (regno != -1)
- return;
- }
-
- if (regno == -1 || getfpregs_supplies (regno))
- {
- struct fpreg fpregs;
-
- if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't get floating point registers");
-
- sparcnbsd_supply_fpreg32 ((char *) &fpregs, regno);
- if (regno != -1)
- return;
- }
+ /* The stack pointer shouldn't be zero. */
+ if (pcb->pcb_sp == 0)
+ return 0;
+
+ regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
+ regcache_raw_supply (regcache, SPARC_O7_REGNUM, &pcb->pcb_pc);
+ regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, &pcb->pcb_psr);
+ regcache_raw_supply (regcache, SPARC32_WIM_REGNUM, &pcb->pcb_wim);
+ regcache_raw_supply (regcache, SPARC32_PC_REGNUM, &pcb->pcb_pc);
+
+ sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
+
+ return 1;
}
+\f
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_sparcnbsd_nat (void);
void
-store_inferior_registers (int regno)
+_initialize_sparcnbsd_nat (void)
{
- /* We don't use deferred stores. */
- if (deferred_stores)
- internal_error (__FILE__, __LINE__,
- "store_inferior_registers: deferred stores pending");
-
- if (regno == -1 || getregs_supplies (regno))
- {
- struct reg regs;
-
- if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) ®s, 0) == -1)
- perror_with_name ("Couldn't get registers");
-
- sparcnbsd_fill_reg32 ((char *) ®s, regno);
-
- if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) ®s, 0) == -1)
- perror_with_name ("Couldn't write registers");
-
- /* Deal with the stack regs. */
- if (regno == -1 || regno == SP_REGNUM
- || (regno >= L0_REGNUM && regno <= I7_REGNUM))
- {
- CORE_ADDR sp = read_register (SP_REGNUM);
- int i;
- char buf[4];
-
- for (i = L0_REGNUM; i <= I7_REGNUM; i++)
- {
- if (regno == -1 || regno == SP_REGNUM || regno == i)
- {
- regcache_collect (i, buf);
- target_write_memory (sp + ((i - L0_REGNUM) * 4),
- buf, sizeof (buf));
- }
- }
- }
-
- if (regno != -1)
- return;
- }
-
- if (regno == -1 || getfpregs_supplies (regno))
- {
- struct fpreg fpregs;
-
- if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't get floating point registers");
-
- sparcnbsd_fill_fpreg32 ((char *) &fpregs, regno);
-
- if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't write floating point registers");
-
- if (regno != -1)
- return;
- }
+ sparc_gregset = &sparc32nbsd_gregset;
+
+ /* We've got nothing to add to the generic SPARC target. */
+ add_target (sparc_target ());
+
+ /* Support debugging kernel virtual memory images. */
+ bsd_kvm_add_target (sparc32nbsd_supply_pcb);
}
OSDN Git Service
