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/tmp/gdb-8.1/gdb/hppa-nbsd-tdep.c
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1 /* Target-dependent code for NetBSD/hppa
2
3 Copyright (C) 2008-2018 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
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.
11
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.
16
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/>. */
19
20 #include "defs.h"
21 #include "osabi.h"
22 #include "regcache.h"
23 #include "regset.h"
24
25 #include "trad-frame.h"
26 #include "tramp-frame.h"
27
28 #include "hppa-tdep.h"
29 #include "hppa-bsd-tdep.h"
30
31 /* From <machine/mcontext.h>. */
32 static int hppanbsd_mc_reg_offset[] =
33 {
34 /* r0 ... r31 */
35 -1, 1 * 4, 2 * 4, 3 * 4,
36 4 * 4, 5 * 4, 6 * 4, 7 * 4,
37 8 * 4, 9 * 4, 10 * 4, 11 * 4,
38 12 * 4, 13 * 4, 14 * 4, 15 * 4,
39 16 * 4, 17 * 4, 18 * 4, 19 * 4,
40 20 * 4, 21 * 4, 22 * 4, 23 * 4,
41 24 * 4, 25 * 4, 26 * 4, 27 * 4,
42 28 * 4, 29 * 4, 30 * 4, 31 * 4,
43
44 32 * 4, /* HPPA_SAR_REGNUM */
45 35 * 4, /* HPPA_PCOQ_HEAD_REGNUM */
46 33 * 4, /* HPPA_PCSQ_HEAD_REGNUM */
47 36 * 4, /* HPPA_PCOQ_TAIL_REGNUM */
48 34 * 4, /* HPPA_PCSQ_TAIL_REGNUM */
49 -1, /* HPPA_EIEM_REGNUM */
50 -1, /* HPPA_IIR_REGNUM */
51 -1, /* HPPA_ISR_REGNUM */
52 -1, /* HPPA_IOR_REGNUM */
53 0 * 4, /* HPPA_IPSW_REGNUM */
54 -1, /* spare? */
55 41 * 4, /* HPPA_SR4_REGNUM */
56 37 * 4, /* sr0 */
57 38 * 4, /* sr1 */
58 39 * 4, /* sr2 */
59 40 * 4, /* sr3 */
60
61 /* more tbd */
62 };
63
64 static void hppanbsd_sigtramp_cache_init (const struct tramp_frame *,
65 struct frame_info *,
66 struct trad_frame_cache *,
67 CORE_ADDR);
68
69 static const struct tramp_frame hppanbsd_sigtramp_si4 =
70 {
71 SIGTRAMP_FRAME,
72 4,
73 {
74 { 0xc7d7c012, -1 }, /* bb,>=,n %arg3, 30, 1f */
75 { 0xd6e01c1e, -1 }, /* depwi 0,31,2,%arg3 */
76 { 0x0ee81093, -1 }, /* ldw 4(%arg3), %r19 */
77 { 0x0ee01097, -1 }, /* ldw 0(%arg3), %arg3 */
78 /* 1: */
79 { 0xe8404000, -1 }, /* blr %r0, %rp */
80 { 0xeae0c002, -1 }, /* bv,n %r0(%arg3) */
81 { 0x08000240, -1 }, /* nop */
82
83 { 0x0803025a, -1 }, /* copy %r3, %arg0 */
84 { 0x20200801, -1 }, /* ldil -40000000, %r1 */
85 { 0xe420e008, -1 }, /* be,l 4(%sr7, %r1), %sr0, %r31 */
86 { 0x34160268, -1 }, /* ldi 134, %t1 ; SYS_setcontext */
87
88 { 0x081c025a, -1 }, /* copy ret0, %arg0 */
89 { 0x20200801, -1 }, /* ldil -40000000, %r1 */
90 { 0xe420e008, -1 }, /* be,l 4(%sr7, %r1), %sr0, %r31 */
91 { 0x34160002, -1 }, /* ldi 1, %t1 ; SYS_exit */
92 { TRAMP_SENTINEL_INSN, -1 }
93 },
94 hppanbsd_sigtramp_cache_init
95 };
96
97
98 static void
99 hppanbsd_sigtramp_cache_init (const struct tramp_frame *self,
100 struct frame_info *this_frame,
101 struct trad_frame_cache *this_cache,
102 CORE_ADDR func)
103 {
104 CORE_ADDR sp = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM);
105 CORE_ADDR base;
106 int *reg_offset;
107 int num_regs;
108 int i;
109
110 reg_offset = hppanbsd_mc_reg_offset;
111 num_regs = ARRAY_SIZE (hppanbsd_mc_reg_offset);
112
113 /* frame pointer */
114 base = sp - 0x280;
115 /* offsetof(struct sigframe_siginfo, sf_uc) = 128 */
116 base += 128;
117 /* offsetof(ucontext_t, uc_mcontext) == 40 */
118 base += 40;
119
120 for (i = 0; i < num_regs; i++)
121 if (reg_offset[i] != -1)
122 trad_frame_set_reg_addr (this_cache, i, base + reg_offset[i]);
123
124 /* Construct the frame ID using the function start. */
125 trad_frame_set_id (this_cache, frame_id_build (sp, func));
126 }
127
128 /* Core file support. */
129
130 /* Sizeof `struct reg' in <machine/reg.h>. */
131 #define HPPANBSD_SIZEOF_GREGS (44 * 4)
132
133 static int hppanbsd_reg_offset[] =
134 {
135 /* r0 ... r31 */
136 -1, 1 * 4, 2 * 4, 3 * 4,
137 4 * 4, 5 * 4, 6 * 4, 7 * 4,
138 8 * 4, 9 * 4, 10 * 4, 11 * 4,
139 12 * 4, 13 * 4, 14 * 4, 15 * 4,
140 16 * 4, 17 * 4, 18 * 4, 19 * 4,
141 20 * 4, 21 * 4, 22 * 4, 23 * 4,
142 24 * 4, 25 * 4, 26 * 4, 27 * 4,
143 28 * 4, 29 * 4, 30 * 4, 31 * 4,
144
145 32 * 4, /* HPPA_SAR_REGNUM */
146 35 * 4, /* HPPA_PCOQ_HEAD_REGNUM */
147 33 * 4, /* HPPA_PCSQ_HEAD_REGNUM */
148 36 * 4, /* HPPA_PCOQ_TAIL_REGNUM */
149 34 * 4, /* HPPA_PCSQ_TAIL_REGNUM */
150 -1, /* HPPA_EIEM_REGNUM */
151 -1, /* HPPA_IIR_REGNUM */
152 -1, /* HPPA_ISR_REGNUM */
153 -1, /* HPPA_IOR_REGNUM */
154 0 * 4, /* HPPA_IPSW_REGNUM */
155 };
156
157 /* Supply register REGNUM from the buffer specified by GREGS and LEN
158 in the general-purpose register set REGSET to register cache
159 REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
160
161 static void
162 hppanbsd_supply_gregset (const struct regset *regset,
163 struct regcache *regcache,
164 int regnum, const void *gregs, size_t len)
165 {
166 const gdb_byte *regs = (const gdb_byte *) gregs;
167 int i;
168
169 gdb_assert (len >= HPPANBSD_SIZEOF_GREGS);
170
171 for (i = 0; i < ARRAY_SIZE (hppanbsd_reg_offset); i++)
172 if (hppanbsd_reg_offset[i] != -1)
173 if (regnum == -1 || regnum == i)
174 regcache_raw_supply (regcache, i, regs + hppanbsd_reg_offset[i]);
175 }
176
177 /* NetBSD/hppa register set. */
178
179 static const struct regset hppanbsd_gregset =
180 {
181 NULL,
182 hppanbsd_supply_gregset
183 };
184
185 /* Iterate over supported core file register note sections. */
186
187 static void
188 hppanbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
189 iterate_over_regset_sections_cb *cb,
190 void *cb_data,
191 const struct regcache *regcache)
192 {
193 cb (".reg", HPPANBSD_SIZEOF_GREGS, &hppanbsd_gregset, NULL, cb_data);
194 }
195
196 static void
197 hppanbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
198 {
199 /* Obviously NetBSD is BSD-based. */
200 hppabsd_init_abi (info, gdbarch);
201
202 /* Core file support. */
203 set_gdbarch_iterate_over_regset_sections
204 (gdbarch, hppanbsd_iterate_over_regset_sections);
205
206 tramp_frame_prepend_unwinder (gdbarch, &hppanbsd_sigtramp_si4);
207 }
208
209 void
210 _initialize_hppanbsd_tdep (void)
211 {
212 gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD,
213 hppanbsd_init_abi);
214 }
gdbarch
Definition: gdbarch.c:127
reg_offset
static int reg_offset[]
Definition: i386-gnu-nat.c:46
trad_frame_set_reg_addr
void trad_frame_set_reg_addr(struct trad_frame_cache *this_trad_cache, int regnum, CORE_ADDR addr)
Definition: trad-frame.c:126
frame_id_build
struct frame_id frame_id_build(CORE_ADDR stack_addr, CORE_ADDR code_addr)
Definition: frame.c:624
hppa-tdep.h
CORE_ADDR
bfd_vma CORE_ADDR
Definition: common-types.h:41
TRAMP_SENTINEL_INSN
#define TRAMP_SENTINEL_INSN
Definition: tramp-frame.h:44
func
void(* func)(char *)
Definition: remote-fileio.c:1104
iterate_over_regset_sections_cb
void() iterate_over_regset_sections_cb(const char *sect_name, int size, const struct regset *regset, const char *human_name, void *cb_data)
Definition: gdbarch.h:99
trad_frame_set_id
void trad_frame_set_id(struct trad_frame_cache *this_trad_cache, struct frame_id this_id)
Definition: trad-frame.c:171
_initialize_hppanbsd_tdep
void _initialize_hppanbsd_tdep(void)
Definition: hppa-nbsd-tdep.c:210
SIGTRAMP_FRAME
Definition: frame.h:255
frame_info
Definition: frame.c:85
defs.h
hppabsd_init_abi
void hppabsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: hppa-bsd-tdep.c:120
HPPANBSD_SIZEOF_GREGS
#define HPPANBSD_SIZEOF_GREGS
Definition: hppa-nbsd-tdep.c:131
regset
Definition: regset.h:34
hppanbsd_sigtramp_cache_init
static void hppanbsd_sigtramp_cache_init(const struct tramp_frame *, struct frame_info *, struct trad_frame_cache *, CORE_ADDR)
Definition: hppa-nbsd-tdep.c:99
trad-frame.h
hppanbsd_supply_gregset
static void hppanbsd_supply_gregset(const struct regset *regset, struct regcache *regcache, int regnum, const void *gregs, size_t len)
Definition: hppa-nbsd-tdep.c:162
osabi.h
trad_frame_cache
Definition: trad-frame.c:27
regcache.h
hppanbsd_iterate_over_regset_sections
static void hppanbsd_iterate_over_regset_sections(struct gdbarch *gdbarch, iterate_over_regset_sections_cb *cb, void *cb_data, const struct regcache *regcache)
Definition: hppa-nbsd-tdep.c:188
hppanbsd_mc_reg_offset
static int hppanbsd_mc_reg_offset[]
Definition: hppa-nbsd-tdep.c:32
regnum
int regnum
Definition: aarch64-tdep.c:77
get_frame_register_unsigned
ULONGEST get_frame_register_unsigned(struct frame_info *frame, int regnum)
Definition: frame.c:1308
gdbarch_register_osabi
void gdbarch_register_osabi(enum bfd_architecture arch, unsigned long machine, enum gdb_osabi osabi, void(*init_osabi)(struct gdbarch_info, struct gdbarch *))
Definition: osabi.c:143
hppa-bsd-tdep.h
hppanbsd_reg_offset
static int hppanbsd_reg_offset[]
Definition: hppa-nbsd-tdep.c:133
gdb_assert
#define gdb_assert(expr)
Definition: gdb_assert.h:32
tramp-frame.h
gdb_byte
bfd_byte gdb_byte
Definition: common-types.h:38
GDB_OSABI_NETBSD
Definition: defs.h:519
tramp_frame_prepend_unwinder
void tramp_frame_prepend_unwinder(struct gdbarch *gdbarch, const struct tramp_frame *tramp_frame)
Definition: tramp-frame.c:146
regcache_raw_supply
void regcache_raw_supply(struct regcache *regcache, int regnum, const void *buf)
Definition: regcache.c:1004
regcache
Definition: regcache.h:232
hppanbsd_init_abi
static void hppanbsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: hppa-nbsd-tdep.c:197
gdbarch_info
Definition: gdbarch.h:1626
regset.h
tramp_frame
Definition: tramp-frame.h:46
hppanbsd_sigtramp_si4
static const struct tramp_frame hppanbsd_sigtramp_si4
Definition: hppa-nbsd-tdep.c:69
set_gdbarch_iterate_over_regset_sections
void set_gdbarch_iterate_over_regset_sections(struct gdbarch *gdbarch, gdbarch_iterate_over_regset_sections_ftype iterate_over_regset_sections)
Definition: gdbarch.c:3647
hppanbsd_gregset
static const struct regset hppanbsd_gregset
Definition: hppa-nbsd-tdep.c:179
HPPA_SP_REGNUM
Definition: hppa-tdep.h:40