1 /* Target-dependent code for Motorola 68000 BSD's.
3 Copyright (C) 2004-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
26 #include "trad-frame.h"
27 #include "tramp-frame.h"
30 #include "m68k-tdep.h"
31 #include "solib-svr4.h"
33 /* Core file support. */
35 /* Sizeof `struct reg' in <machine/reg.h>. */
36 #define M68KBSD_SIZEOF_GREGS (18 * 4)
38 /* Sizeof `struct fpreg' in <machine/reg.h. */
39 #define M68KBSD_SIZEOF_FPREGS (((8 * 3) + 3) * 4)
42 m68kbsd_fpreg_offset (struct gdbarch *gdbarch, int regnum)
44 int fp_len = TYPE_LENGTH (gdbarch_register_type (gdbarch, regnum));
46 if (regnum >= M68K_FPC_REGNUM)
47 return 8 * fp_len + (regnum - M68K_FPC_REGNUM) * 4;
49 return (regnum - M68K_FP0_REGNUM) * fp_len;
52 /* Supply register REGNUM from the buffer specified by FPREGS and LEN
53 in the floating-point register set REGSET to register cache
54 REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
57 m68kbsd_supply_fpregset (const struct regset *regset,
58 struct regcache *regcache,
59 int regnum, const void *fpregs, size_t len)
61 struct gdbarch *gdbarch = regcache->arch ();
62 const gdb_byte *regs = (const gdb_byte *) fpregs;
65 gdb_assert (len >= M68KBSD_SIZEOF_FPREGS);
67 for (i = M68K_FP0_REGNUM; i <= M68K_PC_REGNUM; i++)
69 if (regnum == i || regnum == -1)
70 regcache_raw_supply (regcache, i,
71 regs + m68kbsd_fpreg_offset (gdbarch, i));
75 /* Supply register REGNUM from the buffer specified by GREGS and LEN
76 in the general-purpose register set REGSET to register cache
77 REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
80 m68kbsd_supply_gregset (const struct regset *regset,
81 struct regcache *regcache,
82 int regnum, const void *gregs, size_t len)
84 const gdb_byte *regs = (const gdb_byte *) gregs;
87 gdb_assert (len >= M68KBSD_SIZEOF_GREGS);
89 for (i = M68K_D0_REGNUM; i <= M68K_PC_REGNUM; i++)
91 if (regnum == i || regnum == -1)
92 regcache_raw_supply (regcache, i, regs + i * 4);
95 if (len >= M68KBSD_SIZEOF_GREGS + M68KBSD_SIZEOF_FPREGS)
97 regs += M68KBSD_SIZEOF_GREGS;
98 len -= M68KBSD_SIZEOF_GREGS;
99 m68kbsd_supply_fpregset (regset, regcache, regnum, regs, len);
103 /* Motorola 68000 register sets. */
105 static const struct regset m68kbsd_gregset =
108 m68kbsd_supply_gregset,
113 static const struct regset m68kbsd_fpregset =
116 m68kbsd_supply_fpregset
119 /* Iterate over core file register note sections. */
122 m68kbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
123 iterate_over_regset_sections_cb *cb,
125 const struct regcache *regcache)
127 cb (".reg", M68KBSD_SIZEOF_GREGS, &m68kbsd_gregset, NULL, cb_data);
128 cb (".reg2", M68KBSD_SIZEOF_FPREGS, &m68kbsd_fpregset, NULL, cb_data);
133 m68kbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
135 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
138 tdep->jb_elt_size = 4;
140 set_gdbarch_decr_pc_after_break (gdbarch, 2);
142 set_gdbarch_iterate_over_regset_sections
143 (gdbarch, m68kbsd_iterate_over_regset_sections);
145 /* NetBSD ELF uses the SVR4 ABI. */
146 m68k_svr4_init_abi (info, gdbarch);
147 tdep->struct_return = pcc_struct_return;
149 /* NetBSD ELF uses SVR4-style shared libraries. */
150 set_solib_svr4_fetch_link_map_offsets
151 (gdbarch, svr4_ilp32_fetch_link_map_offsets);
155 _initialize_m68kbsd_tdep (void)
157 gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_NETBSD,