/* Target-dependent code for Motorola 68000 BSD's.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2007, 2008, 2009 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,
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 "arch-utils.h"
+#include "frame.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
+#include "gdbtypes.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#define M68KBSD_SIZEOF_FPREGS (((8 * 3) + 3) * 4)
int
-m68kbsd_fpreg_offset (int regnum)
+m68kbsd_fpreg_offset (struct gdbarch *gdbarch, int regnum)
{
+ int fp_len = TYPE_LENGTH (gdbarch_register_type (gdbarch, regnum));
+
if (regnum >= M68K_FPC_REGNUM)
- return 8 * 12 + (regnum - M68K_FPC_REGNUM) * 4;
+ return 8 * fp_len + (regnum - M68K_FPC_REGNUM) * 4;
- return (regnum - M68K_FP0_REGNUM) * 12;
+ return (regnum - M68K_FP0_REGNUM) * fp_len;
}
/* Supply register REGNUM from the buffer specified by FPREGS and LEN
struct regcache *regcache,
int regnum, const void *fpregs, size_t len)
{
- const char *regs = fpregs;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ const gdb_byte *regs = fpregs;
int i;
gdb_assert (len >= M68KBSD_SIZEOF_FPREGS);
for (i = M68K_FP0_REGNUM; i <= M68K_PC_REGNUM; i++)
{
if (regnum == i || regnum == -1)
- regcache_raw_supply (regcache, i, regs + m68kbsd_fpreg_offset (i));
+ regcache_raw_supply (regcache, i,
+ regs + m68kbsd_fpreg_offset (gdbarch, i));
}
}
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
- const char *regs = gregs;
+ const gdb_byte *regs = gregs;
int i;
gdb_assert (len >= M68KBSD_SIZEOF_GREGS);
}
\f
-/* Support for shared libraries. */
+/* Signal trampolines. */
-/* Return non-zero if we are in a shared library trampoline code stub. */
-
-int
-m68kbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
+static void
+m68kobsd_sigtramp_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
{
- return (name && !strcmp (name, "_DYNAMIC"));
+ CORE_ADDR addr, base, pc;
+ int regnum;
+
+ base = get_frame_register_unsigned (this_frame, M68K_SP_REGNUM);
+
+ /* The 'addql #4,%sp' instruction at offset 8 adjusts the stack
+ pointer. Adjust the frame base accordingly. */
+ pc = get_frame_register_unsigned (this_frame, M68K_PC_REGNUM);
+ if ((pc - func) > 8)
+ base -= 4;
+
+ /* Get frame pointer, stack pointer, program counter and processor
+ state from `struct sigcontext'. */
+ addr = get_frame_memory_unsigned (this_frame, base + 8, 4);
+ trad_frame_set_reg_addr (this_cache, M68K_FP_REGNUM, addr + 8);
+ trad_frame_set_reg_addr (this_cache, M68K_SP_REGNUM, addr + 12);
+ trad_frame_set_reg_addr (this_cache, M68K_PC_REGNUM, addr + 20);
+ trad_frame_set_reg_addr (this_cache, M68K_PS_REGNUM, addr + 24);
+
+ /* The sc_ap member of `struct sigcontext' points to additional
+ hardware state. Here we find the missing registers. */
+ addr = get_frame_memory_unsigned (this_frame, addr + 16, 4) + 4;
+ for (regnum = M68K_D0_REGNUM; regnum < M68K_FP_REGNUM; regnum++, addr += 4)
+ trad_frame_set_reg_addr (this_cache, regnum, addr);
+
+ /* Construct the frame ID using the function start. */
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
}
+
+static const struct tramp_frame m68kobsd_sigtramp = {
+ SIGTRAMP_FRAME,
+ 2,
+ {
+ { 0x206f, -1 }, { 0x000c, -1}, /* moveal %sp@(12),%a0 */
+ { 0x4e90, -1 }, /* jsr %a0@ */
+ { 0x588f, -1 }, /* addql #4,%sp */
+ { 0x4e41, -1 }, /* trap #1 */
+ { 0x2f40, -1 }, { 0x0004, -1 }, /* moveal %d0,%sp@(4) */
+ { 0x7001, -1 }, /* moveq #SYS_exit,%d0 */
+ { 0x4e40, -1 }, /* trap #0 */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ m68kobsd_sigtramp_cache_init
+};
\f
static void
tdep->jb_pc = 5;
tdep->jb_elt_size = 4;
+ set_gdbarch_decr_pc_after_break (gdbarch, 2);
+
set_gdbarch_regset_from_core_section
(gdbarch, m68kbsd_regset_from_core_section);
}
tdep->struct_return = reg_struct_return;
- /* Assume SunOS-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, m68kbsd_aout_in_solib_call_trampoline);
+ tramp_frame_prepend_unwinder (gdbarch, &m68kobsd_sigtramp);
}
/* NetBSD ELF. */
projects / deliverable / binutils-gdb.git / blobdiff