Made changes to shared library support and added more of the support needed

for AIX/IA-64.

1 files changed, 107 insertions, 0 deletions

diff --git a/gdb/ia64-aix-tdep.c b/gdb/ia64-aix-tdep.c
new file mode 100644
index 0000000..26eca6b
--- /dev/null
+++ b/gdb/ia64-aix-tdep.c
@@ -0,0 +1,107 @@
+/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
+   Copyright 2000, 2001
+   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
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   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.  */
+
+#include "defs.h"
+
+/* External hook for finding gate addresses on AIX.  */
+void (*aix5_find_gate_addresses_hook) (CORE_ADDR *, CORE_ADDR *) = 0;
+
+/* Offset to sc_context member of sigcontext structure from frame of handler */
+#define IA64_AIX_SIGCONTEXT_OFFSET 64
+
+/* Return a non-zero value iff PC is in a signal trampoline.  On
+   AIX, we determine this by seeing if the pc is in a special
+   execute only page called the ``gate page''.  The addresses in
+   question are determined by letting the AIX native portion of
+   the code determine these addresses via its own nefarious
+   means.  */
+
+int
+ia64_aix_in_sigtramp (CORE_ADDR pc, char *func_name)
+{
+  CORE_ADDR gate_area_start, gate_area_end;
+
+  if (aix5_find_gate_addresses_hook == 0)
+    return 0;
+
+  (*aix5_find_gate_addresses_hook) (&gate_area_start, &gate_area_end);
+
+  return (pc >=  gate_area_start && pc < gate_area_end);
+}
+
+
+/* IA-64 AIX specific function which, given a frame address and
+   a register number, returns the address at which that register may be
+   found.  0 is returned for registers which aren't stored in the
+   sigcontext structure.  */
+
+CORE_ADDR
+ia64_aix_sigcontext_register_address (CORE_ADDR sp, int regno)
+{
+  /* The hardcoded offsets that follow are actually offsets to the
+     corresponding members in struct __context in
+     /usr/include/sys/context.h (on an IA-64 AIX5 box).  */
+  if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
+    return sp + IA64_AIX_SIGCONTEXT_OFFSET + 152 + 8 * (regno - IA64_GR0_REGNUM);
+  else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM)
+    return sp + IA64_AIX_SIGCONTEXT_OFFSET + 408 + 8 * (regno - IA64_BR0_REGNUM);
+  else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM)
+    return sp + IA64_AIX_SIGCONTEXT_OFFSET + 480 + 16 * (regno - IA64_FR0_REGNUM);
+  else
+    switch (regno)
+      {
+      case IA64_PSR_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 0;
+      case IA64_IP_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 8;
+      /* iipa is at 16.
+         isr is at 24.
+	 ifa is at 32.
+	 iim is at 40. */
+      case IA64_CFM_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 48;  /* ifs, actually */
+      case IA64_RSC_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 56;
+      case IA64_BSP_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 64;
+      case IA64_BSPSTORE_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 72;
+      case IA64_RNAT_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 80;
+      case IA64_PFS_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 88;
+      case IA64_UNAT_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 96;
+      case IA64_PR_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 104;
+      case IA64_CCV_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 112;
+      case IA64_LC_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 120;
+      case IA64_EC_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 128;
+      /* nats is at 136; this is an address independent NaT bitmask */
+      case IA64_FPSR_REGNUM :
+	return sp + IA64_AIX_SIGCONTEXT_OFFSET + 144;
+      default :
+	return 0;
+      }
+}