X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fmips64obsd-tdep.c;h=6d8b9eea31d79ca874f9a34ca7e1537833ea3fb5;hb=3ca7dae4ddfb3363458d866428e45fb5e9b6914b;hp=34ca830195f57ee0d0eef1da727201a26c8120cd;hpb=abc0878268dfb82e186b93665148445000370942;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/mips64obsd-tdep.c b/gdb/mips64obsd-tdep.c
index 34ca830195..6d8b9eea31 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) 2004-2014 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 +15,27 @@
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 . */
#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 "gdb_assert.h"
+#include
+#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. */
@@ -54,7 +61,7 @@ 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
@@ -74,14 +81,84 @@ mips64obsd_regset_from_core_section (struct gdbarch *gdbarch,
}
+/* 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)
{
+ /* OpenBSD/mips64 only supports the n64 ABI, but the braindamaged
+ way GDB works, forces us to pretend we can handle them all. */
+
set_gdbarch_regset_from_core_section
(gdbarch, mips64obsd_regset_from_core_section);
- set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
+ tramp_frame_prepend_unwinder (gdbarch, &mips64obsd_sigframe);
+
+ set_gdbarch_long_double_bit (gdbarch, 128);
+ set_gdbarch_long_double_format (gdbarch, floatformats_mips64_quad);
+
+ 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);
}