Handle signal handler frames and call dummy frames.

1 files changed, 86 insertions, 0 deletions

diff --git a/gdb/ia64-linux-tdep.c b/gdb/ia64-linux-tdep.c
new file mode 100644
index 00000000000..d69dd2af0e1
--- /dev/null
+++ b/gdb/ia64-linux-tdep.c
@@ -0,0 +1,86 @@
+/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
+   Copyright 2000
+   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"
+
+/* The sigtramp code is in a non-readable (executable-only) region
+   of memory called the ``gate page''.  The addresses in question
+   were determined by examining the system headers.  They are
+   overly generous to allow for different pages sizes. */
+
+#define GATE_AREA_START 0xa000000000000100LL
+#define GATE_AREA_END   0xa000000000010000LL
+
+/* Offset to sigcontext structure from frame of handler */
+#define IA64_LINUX_SIGCONTEXT_OFFSET 160
+
+int
+ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
+{
+  return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END);
+}
+
+/* IA-64 GNU/Linux 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 the
+   sigcontext structure. */
+
+CORE_ADDR
+ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
+{
+  if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
+    return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 200 + 8 * (regno - IA64_GR0_REGNUM);
+  else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM)
+    return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 136 + 8 * (regno - IA64_BR0_REGNUM);
+  else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM)
+    return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 464 + 16 * (regno - IA64_FR0_REGNUM);
+  else
+    switch (regno)
+      {
+      case IA64_IP_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 40;
+      case IA64_CFM_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 48;
+      case IA64_PSR_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 56;		/* user mask only */
+      /* sc_ar_rsc is provided, from which we could compute bspstore, but
+	 I don't think it's worth it.  Anyway, if we want it, it's at offset
+	 64 */
+      case IA64_BSP_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 72;
+      case IA64_RNAT_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 80;
+      case IA64_CCV_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 88;
+      case IA64_UNAT_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 96;
+      case IA64_FPSR_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 104;
+      case IA64_PFS_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 112;
+      case IA64_LC_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 120;
+      case IA64_PR_REGNUM :
+	return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 128;
+      default :
+	return 0;
+      }
+}