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mips64-obsd-tdep.c
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1/* Target-dependent code for OpenBSD/mips64.
2
3 Copyright (C) 2004-2023 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 "gdbtypes.h"
22#include "osabi.h"
23#include "regcache.h"
24#include "regset.h"
25#include "trad-frame.h"
26#include "tramp-frame.h"
27
28#include "obsd-tdep.h"
29#include "mips-tdep.h"
30#include "solib-svr4.h"
31
32#define MIPS64OBSD_NUM_REGS 73
33
34/* Core file support. */
35
36/* Supply register REGNUM from the buffer specified by GREGS and LEN
37 in the general-purpose register set REGSET to register cache
38 REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
39
40static void
42 struct regcache *regcache, int regnum,
43 const void *gregs, size_t len)
44{
45 const char *regs = (const char *) gregs;
46 int i;
47
48 for (i = 0; i < MIPS64OBSD_NUM_REGS; i++)
49 {
50 if (regnum == i || regnum == -1)
51 regcache->raw_supply (i, regs + i * 8);
52 }
53}
54
55/* OpenBSD/mips64 register set. */
56
57static const struct regset mips64obsd_gregset =
58{
59 NULL,
61};
62
63/* Iterate over core file register note sections. */
64
65static void
68 void *cb_data,
69 const struct regcache *regcache)
70{
71 cb (".reg", MIPS64OBSD_NUM_REGS * 8, MIPS64OBSD_NUM_REGS * 8,
72 &mips64obsd_gregset, NULL, cb_data);
73}
74
75
76/* Signal trampolines. */
77
78static void
80 frame_info_ptr this_frame,
81 struct trad_frame_cache *cache,
82 CORE_ADDR func)
83{
84 struct gdbarch *gdbarch = get_frame_arch (this_frame);
85 CORE_ADDR sp, sigcontext_addr, addr;
86 int regnum;
87
88 /* We find the appropriate instance of `struct sigcontext' at a
89 fixed offset in the signal frame. */
90 sp = get_frame_register_signed (this_frame,
92 sigcontext_addr = sp + 32;
93
94 /* PC. */
98 sigcontext_addr + 16);
99
100 /* GPRs. */
101 for (regnum = MIPS_AT_REGNUM, addr = sigcontext_addr + 32;
102 regnum <= MIPS_RA_REGNUM; regnum++, addr += 8)
105 addr);
106
107 /* HI and LO. */
111 sigcontext_addr + 280);
115 sigcontext_addr + 288);
116
117 /* TODO: Handle the floating-point registers. */
118
120}
121
122static const struct tramp_frame mips64obsd_sigframe =
123{
126 {
127 { 0x67a40020, ULONGEST_MAX }, /* daddiu a0,sp,32 */
128 { 0x24020067, ULONGEST_MAX }, /* li v0,103 */
129 { 0x0000000c, ULONGEST_MAX }, /* syscall */
130 { 0x0000000d, ULONGEST_MAX }, /* break */
131 { TRAMP_SENTINEL_INSN, ULONGEST_MAX }
132 },
134};
135
136
137static void
139{
140 /* OpenBSD/mips64 only supports the n64 ABI, but the braindamaged
141 way GDB works, forces us to pretend we can handle them all. */
142
145
147
150
151 obsd_init_abi(info, gdbarch);
152
153 /* OpenBSD/mips64 has SVR4-style shared libraries. */
156}
157
159void
int regnum
void raw_supply(int regnum, const void *buf) override
Definition regcache.c:1062
LONGEST get_frame_register_signed(frame_info_ptr frame, int regnum)
Definition frame.c:1365
struct frame_id frame_id_build(CORE_ADDR stack_addr, CORE_ADDR code_addr)
Definition frame.c:736
struct gdbarch * get_frame_arch(frame_info_ptr this_frame)
Definition frame.c:3027
@ SIGTRAMP_FRAME
Definition frame.h:198
int gdbarch_num_regs(struct gdbarch *gdbarch)
Definition gdbarch.c:1930
void set_gdbarch_long_double_format(struct gdbarch *gdbarch, const struct floatformat **long_double_format)
Definition gdbarch.c:1663
void set_gdbarch_long_double_bit(struct gdbarch *gdbarch, int long_double_bit)
Definition gdbarch.c:1646
void set_gdbarch_iterate_over_regset_sections(struct gdbarch *gdbarch, gdbarch_iterate_over_regset_sections_ftype *iterate_over_regset_sections)
void iterate_over_regset_sections_cb(const char *sect_name, int supply_size, int collect_size, const struct regset *regset, const char *human_name, void *cb_data)
Definition gdbarch.h:104
const struct floatformat * floatformats_ieee_quad[BFD_ENDIAN_UNKNOWN]
Definition gdbtypes.c:93
const struct mips_regnum * mips_regnum(struct gdbarch *gdbarch)
Definition mips-tdep.c:228
@ MIPS_RA_REGNUM
Definition mips-tdep.h:143
@ MIPS_SP_REGNUM
Definition mips-tdep.h:142
@ MIPS_AT_REGNUM
Definition mips-tdep.h:136
@ MIPS_INSN32_SIZE
Definition mips-tdep.h:161
static void mips64obsd_sigframe_init(const struct tramp_frame *self, frame_info_ptr this_frame, struct trad_frame_cache *cache, CORE_ADDR func)
#define MIPS64OBSD_NUM_REGS
static const struct tramp_frame mips64obsd_sigframe
static void mips64obsd_supply_gregset(const struct regset *regset, struct regcache *regcache, int regnum, const void *gregs, size_t len)
static void mips64obsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
void _initialize_mips64obsd_tdep()
static void mips64obsd_iterate_over_regset_sections(struct gdbarch *gdbarch, iterate_over_regset_sections_cb *cb, void *cb_data, const struct regcache *regcache)
static const struct regset mips64obsd_gregset
void obsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition obsd-tdep.c:294
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:146
@ GDB_OSABI_OPENBSD
Definition osabi.h:35
void(* func)(remote_target *remote, char *)
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
struct link_map_offsets * svr4_lp64_fetch_link_map_offsets(void)
void trad_frame_set_reg_addr(struct trad_frame_cache *this_trad_cache, int regnum, CORE_ADDR addr)
Definition trad-frame.c:110
void trad_frame_set_id(struct trad_frame_cache *this_trad_cache, struct frame_id this_id)
Definition trad-frame.c:220
void tramp_frame_prepend_unwinder(struct gdbarch *gdbarch, const struct tramp_frame *tramp_frame)
#define TRAMP_SENTINEL_INSN
Definition tramp-frame.h:44