ChangeLog:

[deliverable/binutils-gdb.git] / gdb / sparc64-linux-tdep.c

diff --git a/gdb/sparc64-linux-tdep.c b/gdb/sparc64-linux-tdep.c
index ce1c6cbcf88e99ddb1f68a321facbe95be0b5b44..af22f6187afbc3f09c52b48187781b752c75d89d 100644 (file)
--- a/gdb/sparc64-linux-tdep.c
+++ b/gdb/sparc64-linux-tdep.c
@@ -1,12 +1,12 @@
 /* Target-dependent code for GNU/Linux UltraSPARC.
 
-   Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2007, 2008 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
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -15,14 +15,16 @@
    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., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
 #include "frame.h"
 #include "frame-unwind.h"
+#include "dwarf2-frame.h"
+#include "regset.h"
+#include "regcache.h"
 #include "gdbarch.h"
+#include "gdbcore.h"
 #include "osabi.h"
 #include "solib-svr4.h"
 #include "symtab.h"
@@ -97,6 +99,81 @@ sparc64_linux_sigframe_init (const struct tramp_frame *self,
     }
   trad_frame_set_id (this_cache, frame_id_build (base, func));
 }
+\f
+/* Return the address of a system call's alternative return
+   address.  */
+
+static CORE_ADDR
+sparc64_linux_step_trap (struct frame_info *frame, unsigned long insn)
+{
+  if (insn == 0x91d0206d)
+    {
+      ULONGEST sp = get_frame_register_unsigned (frame, SPARC_SP_REGNUM);
+      if (sp & 1)
+       sp += BIAS;
+
+      /* The kernel puts the sigreturn registers on the stack,
+        and this is where the signal unwinding state is take from
+        when returning from a signal.
+
+        A siginfo_t sits 192 bytes from the base of the stack.  This
+        siginfo_t is 128 bytes, and is followed by the sigreturn
+        register save area.  The saved PC sits at a 136 byte offset
+        into there.  */
+
+      return read_memory_unsigned_integer (sp + 192 + 128 + 136, 8);
+    }
+
+  return 0;
+}
+\f
+
+const struct sparc_gregset sparc64_linux_core_gregset =
+{
+  32 * 8,                      /* %tstate */
+  33 * 8,                      /* %tpc */
+  34 * 8,                      /* %tnpc */
+  35 * 8,                      /* %y */
+  -1,                          /* %wim */
+  -1,                          /* %tbr */
+  1 * 8,                       /* %g1 */
+  16 * 8,                      /* %l0 */
+  8,                           /* y size */
+};
+\f
+
+static void
+sparc64_linux_supply_core_gregset (const struct regset *regset,
+                                  struct regcache *regcache,
+                                  int regnum, const void *gregs, size_t len)
+{
+  sparc64_supply_gregset (&sparc64_linux_core_gregset, regcache, regnum, gregs);
+}
+
+static void
+sparc64_linux_collect_core_gregset (const struct regset *regset,
+                                   const struct regcache *regcache,
+                                   int regnum, void *gregs, size_t len)
+{
+  sparc64_collect_gregset (&sparc64_linux_core_gregset, regcache, regnum, gregs);
+}
+
+static void
+sparc64_linux_supply_core_fpregset (const struct regset *regset,
+                                   struct regcache *regcache,
+                                   int regnum, const void *fpregs, size_t len)
+{
+  sparc64_supply_fpregset (regcache, regnum, fpregs);
+}
+
+static void
+sparc64_linux_collect_core_fpregset (const struct regset *regset,
+                                    const struct regcache *regcache,
+                                    int regnum, void *fpregs, size_t len)
+{
+  sparc64_collect_fpregset (regcache, regnum, fpregs);
+}
+
 \f
 
 static void
@@ -104,8 +181,19 @@ sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
+  tdep->gregset = regset_alloc (gdbarch, sparc64_linux_supply_core_gregset,
+                               sparc64_linux_collect_core_gregset);
+  tdep->sizeof_gregset = 288;
+
+  tdep->fpregset = regset_alloc (gdbarch, sparc64_linux_supply_core_fpregset,
+                                sparc64_linux_collect_core_fpregset);
+  tdep->sizeof_fpregset = 280;
+
   tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe);
 
+  /* Hook in the DWARF CFI frame unwinder.  */
+  frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+
   sparc64_init_abi (info, gdbarch);
 
   /* GNU/Linux has SVR4-style shared libraries...  */
@@ -120,6 +208,9 @@ sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   /* Enable TLS support.  */
   set_gdbarch_fetch_tls_load_module_address (gdbarch,
                                              svr4_fetch_objfile_link_map);
+
+  /* Make sure we can single-step over signal return system calls.  */
+  tdep->step_trap = sparc64_linux_step_trap;
 }
 \f