* ia64-linux-nat.c: Update copyright year.

[deliverable/binutils-gdb.git] / gdb / sparcnbsd-nat.c

diff --git a/gdb/sparcnbsd-nat.c b/gdb/sparcnbsd-nat.c
index f63d9e5ace040433e46b74fd2314822caae6b8bd..fa663f2478c35886e37282146bb62ca762482a38 100644 (file)
--- a/gdb/sparcnbsd-nat.c
+++ b/gdb/sparcnbsd-nat.c
@@ -1,6 +1,6 @@
-/* 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.
 
@@ -20,136 +20,52 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "defs.h"
-#include "inferior.h"
+#include "gdbcore.h"
 #include "regcache.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) &regs, 0) == -1)
-        perror_with_name ("Couldn't get registers");
-
-      sparcnbsd_supply_reg32 ((char *) &regs, 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) &regs, 0) == -1)
-       perror_with_name ("Couldn't get registers");
-
-      sparcnbsd_fill_reg32 ((char *) &regs, regno);
-
-      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
-                 (PTRACE_ARG3_TYPE) &regs, 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;
+
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (sparc32nbsd_supply_pcb);
 }