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[deliverable/binutils-gdb.git] / gdb / ia64-linux-tdep.c

diff --git a/gdb/ia64-linux-tdep.c b/gdb/ia64-linux-tdep.c
index 12f0c18c112777edd448a5f781517a722a72f031..2ce3b9a080590c1b40bda057c5274403f0cc396a 100644 (file)
--- a/gdb/ia64-linux-tdep.c
+++ b/gdb/ia64-linux-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
 
-   Copyright 2000, 2004 Free Software Foundation, Inc.
+   Copyright 2000, 2004, 2005 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -23,6 +23,9 @@
 #include "ia64-tdep.h"
 #include "arch-utils.h"
 #include "gdbcore.h"
+#include "regcache.h"
+#include "osabi.h"
+#include "solib-svr4.h"
 
 /* The sigtramp code is in a non-readable (executable-only) region
    of memory called the ``gate page''.  The addresses in question
@@ -46,7 +49,7 @@ ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
    found.  0 is returned for registers which aren't stored in the the
    sigcontext structure. */
 
-CORE_ADDR
+static CORE_ADDR
 ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
 {
   char buf[8];
@@ -94,3 +97,43 @@ ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
        return 0;
       }
 }
+
+static void
+ia64_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
+{
+  ia64_write_pc (pc, ptid);
+
+  /* We must be careful with modifying the instruction-pointer: if we
+     just interrupt a system call, the kernel would ordinarily try to
+     restart it when we resume the inferior, which typically results
+     in SIGSEGV or SIGILL.  We prevent this by clearing r10, which
+     will tell the kernel that r8 does NOT contain a valid error code
+     and hence it will skip system-call restart.
+
+     The clearing of r10 is safe as long as ia64_write_pc() is only
+     called as part of setting up an inferior call.  */
+  write_register_pid (IA64_GR10_REGNUM, 0, ptid);
+}
+
+static void
+ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  /* Set the method of obtaining the sigcontext addresses at which
+     registers are saved.  */
+  tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
+
+  set_gdbarch_write_pc (gdbarch, ia64_linux_write_pc);
+
+  /* Enable TLS support.  */
+  set_gdbarch_fetch_tls_load_module_address (gdbarch,
+                                             svr4_fetch_objfile_link_map);
+}
+
+void
+_initialize_ia64_linux_tdep (void)
+{
+  gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_LINUX,
+                         ia64_linux_init_abi);
+}