2004-09-14 Andrew Cagney <cagney@gnu.org>

[deliverable/binutils-gdb.git] / gdb / hppa-linux-nat.c

diff --git a/gdb/hppa-linux-nat.c b/gdb/hppa-linux-nat.c
index caea9aad7abd71cd627b1e171db92390540e8a20..b6a4f2091a45194251e5b7f3176fa7e852ce5c8f 100644 (file)
--- a/gdb/hppa-linux-nat.c
+++ b/gdb/hppa-linux-nat.c
@@ -1,4 +1,5 @@
-/* Functions specific to running gdb native on HPPA running Linux.
+/* Functions specific to running GDB native on HPPA running GNU/Linux.
+
    Copyright 2004 Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -22,10 +23,17 @@
 #include "gdbcore.h"
 #include "regcache.h"
 #include "gdb_string.h"
+#include "inferior.h"
 
 #include <sys/procfs.h>
-#include <string.h>
+#include <sys/ptrace.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,43)
+#include <asm/offset.h>
+#else
 #include <asm/offsets.h>
+#endif
 
 #include "hppa-tdep.h"
 
@@ -201,6 +209,99 @@ static const int greg_map[] =
     HPPA_CCR_REGNUM, HPPA_EIEM_REGNUM,
   };
 
+
+
+/* Fetch one register.  */
+
+static void
+fetch_register (int regno)
+{
+  int tid;
+  int val;
+
+  if (CANNOT_FETCH_REGISTER (regno))
+    {
+      regcache_raw_supply (current_regcache, regno, NULL);
+      return;
+    }
+
+  /* GNU/Linux LWP ID's are process ID's.  */
+  tid = TIDGET (inferior_ptid);
+  if (tid == 0)
+    tid = PIDGET (inferior_ptid); /* Not a threaded program.  */
+
+  errno = 0;
+  val = ptrace (PTRACE_PEEKUSER, tid, register_addr (regno, 0), 0);
+  if (errno != 0)
+    error ("Couldn't read register %s (#%d): %s.", REGISTER_NAME (regno),
+          regno, safe_strerror (errno));
+
+  regcache_raw_supply (current_regcache, regno, &val);
+}
+
+/* Store one register. */
+
+static void
+store_register (int regno)
+{
+  int tid;
+  int val;
+
+  if (CANNOT_STORE_REGISTER (regno))
+    return;
+
+  /* GNU/Linux LWP ID's are process ID's.  */
+  tid = TIDGET (inferior_ptid);
+  if (tid == 0)
+    tid = PIDGET (inferior_ptid); /* Not a threaded program.  */
+
+  errno = 0;
+  regcache_raw_collect (current_regcache, regno, &val);
+  ptrace (PTRACE_POKEUSER, tid, register_addr (regno, 0), val);
+  if (errno != 0)
+    error ("Couldn't write register %s (#%d): %s.", REGISTER_NAME (regno),
+          regno, safe_strerror (errno));
+}
+
+/* Fetch registers from the child process.  Fetch all registers if
+   regno == -1, otherwise fetch all general registers or all floating
+   point registers depending upon the value of regno.  */
+
+void
+fetch_inferior_registers (int regno)
+{
+  if (-1 == regno)
+    {
+      for (regno = 0; regno < NUM_REGS; regno++)
+        fetch_register (regno);
+    }
+  else 
+    {
+      fetch_register (regno);
+    }
+}
+
+/* Store registers back into the inferior.  Store all registers if
+   regno == -1, otherwise store all general registers or all floating
+   point registers depending upon the value of regno.  */
+
+void
+store_inferior_registers (int regno)
+{
+  if (-1 == regno)
+    {
+      for (regno = 0; regno < NUM_REGS; regno++)
+       store_register (regno);
+    }
+  else
+    {
+      store_register (regno);
+    }
+}
+
+/* Fill GDB's register array with the general-purpose register values
+   in *gregsetp.  */
+
 void
 supply_gregset (gdb_gregset_t *gregsetp)
 {
@@ -210,28 +311,26 @@ supply_gregset (gdb_gregset_t *gregsetp)
   for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++)
     {
       int regno = greg_map[i];
-      int size = register_size (current_gdbarch, regno);
-      /* When running a 64 bit kernel, a greg_t may be larger than the
-        actual register, so just pick off the LS bits of big-endian word.  */
-      supply_register (regno, ((char *) (regp + 1)) - size);
+      regcache_raw_supply (current_regcache, regno, regp);
     }
 }
 
+/* Fill register regno (if it is a general-purpose register) in
+   *gregsetp with the appropriate value from GDB's register array.
+   If regno is -1, do this for all registers.  */
+
 void
 fill_gregset (gdb_gregset_t *gregsetp, int regno)
 {
   int i;
-  greg_t *regp = (greg_t *) gregsetp;
 
-  memset (gregsetp, 0, sizeof (*gregsetp));
-  for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++)
+  for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++)
     {
-      int regi = greg_map[i];
+      int mregno = greg_map[i];
 
-      if (regno == -1 || regi == regno)
+      if (regno == -1 || regno == mregno)
        {
-         int rawsize = register_size (current_gdbarch, regi);
-         regcache_collect (regi, ((char *) (regp + 1)) - rawsize);
+          regcache_raw_collect(current_regcache, mregno, &(*gregsetp)[i]);
        }
     }
 }
@@ -243,14 +342,15 @@ fill_gregset (gdb_gregset_t *gregsetp, int regno)
 void
 supply_fpregset (gdb_fpregset_t *fpregsetp)
 {
-  register int regi;
+  int regi;
   char *from;
 
   for (regi = 0; regi <= 31; regi++)
     {
       from = (char *) &((*fpregsetp)[regi]);
-      supply_register (2*regi + HPPA_FP0_REGNUM, from);
-      supply_register (2*regi + HPPA_FP0_REGNUM + 1, from + 4);
+      regcache_raw_supply (current_regcache, 2*regi + HPPA_FP0_REGNUM, from);
+      regcache_raw_supply (current_regcache, 2*regi + HPPA_FP0_REGNUM + 1,
+                          from + 4);
     }
 }
 
@@ -264,16 +364,13 @@ fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
 {
   int i;
 
-  for (i = 0; i < NUM_REGS; i++)
+  for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32 * 2; i++)
    {
-    if (regno == -1 || regno == i)
-      {
-        /* Gross.  fpregset_t is double, registers[x] has single
-          precision reg.  */
-        char *to = (char *) &((*fpregsetp)[(i - HPPA_FP0_REGNUM) / 2]);
-        if ((i - HPPA_FP0_REGNUM) & 1)
-         to += 4;
-        regcache_collect (i, to);
-      }
+      /* Gross.  fpregset_t is double, registers[x] has single
+        precision reg.  */
+      char *to = (char *) &((*fpregsetp)[(i - HPPA_FP0_REGNUM) / 2]);
+      if ((i - HPPA_FP0_REGNUM) & 1)
+       to += 4;
+      regcache_raw_collect (current_regcache, i, to);
    }
 }