X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fmips64obsd-tdep.c;h=df8ec0f8dd8cd94226d77ad42bb25f0bc68f8449;hb=e26b7e41652e288dfdb4c48121bba470c4774150;hp=34ca830195f57ee0d0eef1da727201a26c8120cd;hpb=abc0878268dfb82e186b93665148445000370942;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/mips64obsd-tdep.c b/gdb/mips64obsd-tdep.c
index 34ca830195..df8ec0f8dd 100644
--- a/gdb/mips64obsd-tdep.c
+++ b/gdb/mips64obsd-tdep.c
@@ -1,12 +1,12 @@
 /* Target-dependent code for OpenBSD/mips64.
 
-   Copyright 2004 Free Software Foundation, Inc.
+   Copyright (C) 2004-2016 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,
@@ -15,20 +15,24 @@
    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.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
+#include "gdbtypes.h"
 #include "osabi.h"
 #include "regcache.h"
 #include "regset.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
 
-#include "gdb_string.h"
-
+#include "obsd-tdep.h"
 #include "mips-tdep.h"
 #include "solib-svr4.h"
 
+/* The MIPS64 Floating-Point Quad-Precision format is similar to
+   big-endian IA-64 Quad-Precision format.  */
+#define floatformats_mips64_quad floatformats_ia64_quad
+
 #define MIPS64OBSD_NUM_REGS 73
 
 /* Core file support.  */
@@ -42,7 +46,7 @@ mips64obsd_supply_gregset (const struct regset *regset,
 			   struct regcache *regcache, int regnum,
 			   const void *gregs, size_t len)
 {
-  const char *regs = gregs;
+  const char *regs = (const char *) gregs;
   int i;
 
   for (i = 0; i < MIPS64OBSD_NUM_REGS; i++)
@@ -54,34 +58,102 @@ mips64obsd_supply_gregset (const struct regset *regset,
 
 /* OpenBSD/mips64 register set.  */
 
-static struct regset mips64obsd_gregset =
+static const struct regset mips64obsd_gregset =
 {
   NULL,
   mips64obsd_supply_gregset
 };
 
-/* Return the appropriate register set for the core section identified
-   by SECT_NAME and SECT_SIZE.  */
+/* Iterate over core file register note sections.  */
 
-static const struct regset *
-mips64obsd_regset_from_core_section (struct gdbarch *gdbarch,
-				     const char *sect_name, size_t sect_size)
+static void
+mips64obsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+					 iterate_over_regset_sections_cb *cb,
+					 void *cb_data,
+					 const struct regcache *regcache)
 {
-  if (strcmp (sect_name, ".reg") == 0 && sect_size >= MIPS64OBSD_NUM_REGS * 8)
-    return &mips64obsd_gregset;
-
-  return NULL;
+  cb (".reg", MIPS64OBSD_NUM_REGS * 8, &mips64obsd_gregset, NULL, cb_data);
 }
 
 
+/* Signal trampolines.  */
+
+static void
+mips64obsd_sigframe_init (const struct tramp_frame *self,
+			  struct frame_info *this_frame,
+			  struct trad_frame_cache *cache,
+			  CORE_ADDR func)
+{
+  struct gdbarch *gdbarch = get_frame_arch (this_frame);
+  CORE_ADDR sp, sigcontext_addr, addr;
+  int regnum;
+
+  /* We find the appropriate instance of `struct sigcontext' at a
+     fixed offset in the signal frame.  */
+  sp = get_frame_register_signed (this_frame,
+				  MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch));
+  sigcontext_addr = sp + 32;
+
+  /* PC.  */
+  regnum = mips_regnum (gdbarch)->pc;
+  trad_frame_set_reg_addr (cache,
+			   regnum + gdbarch_num_regs (gdbarch),
+			    sigcontext_addr + 16);
+
+  /* GPRs.  */
+  for (regnum = MIPS_AT_REGNUM, addr = sigcontext_addr + 32;
+       regnum <= MIPS_RA_REGNUM; regnum++, addr += 8)
+    trad_frame_set_reg_addr (cache,
+			     regnum + gdbarch_num_regs (gdbarch),
+			     addr);
+
+  /* HI and LO.  */
+  regnum = mips_regnum (gdbarch)->lo;
+  trad_frame_set_reg_addr (cache,
+			   regnum + gdbarch_num_regs (gdbarch),
+			   sigcontext_addr + 280);
+  regnum = mips_regnum (gdbarch)->hi;
+  trad_frame_set_reg_addr (cache,
+			   regnum + gdbarch_num_regs (gdbarch),
+			   sigcontext_addr + 288);
+
+  /* TODO: Handle the floating-point registers.  */
+
+  trad_frame_set_id (cache, frame_id_build (sp, func));
+}
+
+static const struct tramp_frame mips64obsd_sigframe =
+{
+  SIGTRAMP_FRAME,
+  MIPS_INSN32_SIZE,
+  {
+    { 0x67a40020, -1 },		/* daddiu  a0,sp,32 */
+    { 0x24020067, -1 },		/* li      v0,103 */
+    { 0x0000000c, -1 },		/* syscall */
+    { 0x0000000d, -1 },		/* break */
+    { TRAMP_SENTINEL_INSN, -1 }
+  },
+  mips64obsd_sigframe_init
+};
+
+
 static void
 mips64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
-  set_gdbarch_regset_from_core_section
-    (gdbarch, mips64obsd_regset_from_core_section);
+  /* OpenBSD/mips64 only supports the n64 ABI, but the braindamaged
+     way GDB works, forces us to pretend we can handle them all.  */
+
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, mips64obsd_iterate_over_regset_sections);
+
+  tramp_frame_prepend_unwinder (gdbarch, &mips64obsd_sigframe);
+
+  set_gdbarch_long_double_bit (gdbarch, 128);
+  set_gdbarch_long_double_format (gdbarch, floatformats_mips64_quad);
 
-  set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
+  obsd_init_abi(info, gdbarch);
 
+  /* OpenBSD/mips64 has SVR4-style shared libraries.  */
   set_solib_svr4_fetch_link_map_offsets
     (gdbarch, svr4_lp64_fetch_link_map_offsets);
 }