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authorMark Kettenis <kettenis@gnu.org>2004-04-30 23:28:52 +0000
committerMark Kettenis <kettenis@gnu.org>2004-04-30 23:28:52 +0000
commit5bd15c107c192c4fbd872c7cacd07e89c5b4eaa2 (patch)
treee6541236c51cb9f141c6267e2e21006285438307 /gdb/m68kbsd-tdep.c
parent0f935c4068d35bab21d8823452bcf754a7ed1b51 (diff)
downloadgdb-5bd15c107c192c4fbd872c7cacd07e89c5b4eaa2.tar.gz
Add OpenBSD/m68k support.
* NEWS (New native configurations): Mention OpenBSD/m68k. * m68kbsd-tdep.c: New file. * m68kbsd-nat.c: New file. * Makefile.in (ALLDEPFILES): Add m68kbsd-nat.c and m68kbsd-tdep.c. (m68kbsd-nat.o, m68kbsd-tdep.o): New dependencies. * configure.host: Add m68k-*-openbsd. * configure.tgt: Add m68k-*-openbsd. * config/m68k/tm-obsd.h: New file. * config/m68k/obsd.mt: New file. * config/m68k/obsd.mh: New file. * config/djgpp/fnchange.lst: Add entries for m68kbsd-nat.c and m68kbsd-tdep.c.
Diffstat (limited to 'gdb/m68kbsd-tdep.c')
-rw-r--r--gdb/m68kbsd-tdep.c226
1 files changed, 226 insertions, 0 deletions
diff --git a/gdb/m68kbsd-tdep.c b/gdb/m68kbsd-tdep.c
new file mode 100644
index 00000000000..a9a5b4e564f
--- /dev/null
+++ b/gdb/m68kbsd-tdep.c
@@ -0,0 +1,226 @@
+/* Target-dependent code for Motorola 68000 BSD's.
+
+ Copyright 2004 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
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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. */
+
+#include "defs.h"
+#include "arch-utils.h"
+#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
+
+#include "m68k-tdep.h"
+#include "solib-svr4.h"
+
+/* Core file support. */
+
+/* Sizeof `struct reg' in <machine/reg.h>. */
+#define M68KBSD_SIZEOF_GREGS (18 * 4)
+
+/* Sizeof `struct fpreg' in <machine/reg.h. */
+#define M68KBSD_SIZEOF_FPREGS (((8 * 3) + 3) * 4)
+
+int
+m68kbsd_fpreg_offset (int regnum)
+{
+ if (regnum >= M68K_FPC_REGNUM)
+ return 8 * 12 + (regnum - M68K_FPC_REGNUM) * 4;
+
+ return (regnum - M68K_FP0_REGNUM) * 12;
+}
+
+/* Supply register REGNUM from the buffer specified by FPREGS and LEN
+ in the floating-point register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+m68kbsd_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ const char *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));
+ }
+}
+
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+m68kbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const char *regs = gregs;
+ int i;
+
+ gdb_assert (len >= M68KBSD_SIZEOF_GREGS);
+
+ for (i = M68K_D0_REGNUM; i <= M68K_PC_REGNUM; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + i * 4);
+ }
+
+ if (len >= M68KBSD_SIZEOF_GREGS + M68KBSD_SIZEOF_FPREGS)
+ {
+ regs += M68KBSD_SIZEOF_GREGS;
+ len -= M68KBSD_SIZEOF_GREGS;
+ m68kbsd_supply_fpregset (regset, regcache, regnum, regs, len);
+ }
+}
+
+/* Motorola 68000 register sets. */
+
+static struct regset m68kbsd_gregset =
+{
+ NULL,
+ m68kbsd_supply_gregset
+};
+
+static struct regset m68kbsd_fpregset =
+{
+ NULL,
+ m68kbsd_supply_fpregset
+};
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+static const struct regset *
+m68kbsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
+{
+ if (strcmp (sect_name, ".reg") == 0 && sect_size >= M68KBSD_SIZEOF_GREGS)
+ return &m68kbsd_gregset;
+
+ if (strcmp (sect_name, ".reg2") == 0 && sect_size >= M68KBSD_SIZEOF_FPREGS)
+ return &m68kbsd_fpregset;
+
+ return NULL;
+}
+
+
+/* Support for shared libraries. */
+
+/* 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)
+{
+ return (name && !strcmp (name, "_DYNAMIC"));
+}
+
+
+static void
+m68kbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ tdep->jb_pc = 5;
+ tdep->jb_elt_size = 4;
+
+ set_gdbarch_regset_from_core_section
+ (gdbarch, m68kbsd_regset_from_core_section);
+}
+
+/* OpenBSD and NetBSD a.out. */
+
+static void
+m68kbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ m68kbsd_init_abi (info, gdbarch);
+
+ tdep->struct_return = reg_struct_return;
+
+ /* Assume SunOS-style shared libraries. */
+ set_gdbarch_in_solib_call_trampoline
+ (gdbarch, m68kbsd_aout_in_solib_call_trampoline);
+}
+
+/* NetBSD ELF. */
+
+static void
+m68kbsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ m68kbsd_init_abi (info, gdbarch);
+
+ tdep->struct_return = pcc_struct_return;
+
+ /* NetBSD ELF uses SVR4-style shared libraries. */
+ set_gdbarch_in_solib_call_trampoline
+ (gdbarch, generic_in_solib_call_trampoline);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+}
+
+
+static enum gdb_osabi
+m68kbsd_aout_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "a.out-m68k-netbsd") == 0
+ || strcmp (bfd_get_target (abfd), "a.out-m68k4k-netbsd") == 0)
+ return GDB_OSABI_NETBSD_AOUT;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+static enum gdb_osabi
+m68kbsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_AOUT;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_m68kbsd_tdep (void);
+
+void
+_initialize_m68kbsd_tdep (void)
+{
+ gdbarch_register_osabi_sniffer (bfd_arch_m68k, bfd_target_aout_flavour,
+ m68kbsd_aout_osabi_sniffer);
+
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_m68k, bfd_target_unknown_flavour,
+ m68kbsd_core_osabi_sniffer);
+
+ gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_NETBSD_AOUT,
+ m68kbsd_aout_init_abi);
+ gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_NETBSD_ELF,
+ m68kbsd_elf_init_abi);
+}