-/* 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 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GDB.
Boston, MA 02111-1307, USA. */
#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 == 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);
}