1 /* Target-dependent code for GNU/Linux on CSKY.
3 Copyright (C) 2012-2019 Free Software Foundation, Inc.
5 Contributed by C-SKY Microsystems and Mentor Graphics.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "glibc-tdep.h"
25 #include "linux-tdep.h"
27 #include "solib-svr4.h"
29 #include "trad-frame.h"
30 #include "tramp-frame.h"
31 #include "csky-tdep.h"
33 /* Functions, definitions, and data structures for C-Sky core file debug. */
35 /* General regset pc, r1, r0, psr, r2-r31 for CK810. */
36 #define SIZEOF_CSKY_GREGSET 34*4
37 /* Float regset fesr fsr fr0-fr31 for CK810. */
38 #define SIZEOF_CSKY_FREGSET 34*4
40 /* Offset mapping table from core_section to regcache of general
41 registers for ck810. */
42 static const int csky_gregset_offset[] =
44 72, 1, 0, 89, 2, /* pc, r1, r0, psr, r2. */
45 3, 4, 5, 6, 7, /* r3 ~ r32. */
53 /* Offset mapping table from core_section to regcache of float
54 registers for ck810. */
56 static const int csky_fregset_offset[] =
58 122, 123, 40, 41, 42, /* fcr, fesr, fr0 ~ fr2. */
59 43, 44, 45, 46, 47, /* fr3 ~ fr15. */
64 /* Implement the supply_regset hook for GP registers in core files. */
67 csky_supply_gregset (const struct regset *regset,
68 struct regcache *regcache, int regnum,
69 const void *regs, size_t len)
72 const gdb_byte *gregs = (const gdb_byte *) regs ;
74 gdb_assert (len >= SIZEOF_CSKY_GREGSET);
75 gregset_num = ARRAY_SIZE (csky_gregset_offset);
77 for (i = 0; i < gregset_num; i++)
79 if ((regnum == csky_gregset_offset[i] || regnum == -1)
80 && csky_gregset_offset[i] != -1)
81 regcache->raw_supply (csky_gregset_offset[i], gregs + 4 * i);
85 /* Implement the collect_regset hook for GP registers in core files. */
88 csky_collect_gregset (const struct regset *regset,
89 const struct regcache *regcache,
90 int regnum, void *gregs_buf, size_t len)
92 int regno, gregset_num;
93 gdb_byte *gregs = (gdb_byte *) gregs_buf ;
95 gdb_assert (len >= SIZEOF_CSKY_GREGSET);
96 gregset_num = ARRAY_SIZE (csky_gregset_offset);
98 for (regno = 0; regno < gregset_num; regno++)
100 if ((regnum == csky_gregset_offset[regno] || regnum == -1)
101 && csky_gregset_offset[regno] != -1)
102 regcache->raw_collect (regno,
103 gregs + 4 + csky_gregset_offset[regno]);
107 /* Implement the supply_regset hook for FP registers in core files. */
110 csky_supply_fregset (const struct regset *regset,
111 struct regcache *regcache, int regnum,
112 const void *regs, size_t len)
116 struct gdbarch *gdbarch = regcache->arch ();
117 const gdb_byte *fregs = (const gdb_byte *) regs;
118 int fregset_num = ARRAY_SIZE (csky_fregset_offset);
120 gdb_assert (len >= SIZEOF_CSKY_FREGSET);
121 for (i = 0; i < fregset_num; i++)
123 if ((regnum == csky_fregset_offset[i] || regnum == -1)
124 && csky_fregset_offset[i] != -1)
126 int num = csky_fregset_offset[i];
127 offset += register_size (gdbarch, num);
128 regcache->raw_supply (csky_fregset_offset[i], fregs + offset);
133 /* Implement the collect_regset hook for FP registers in core files. */
136 csky_collect_fregset (const struct regset *regset,
137 const struct regcache *regcache,
138 int regnum, void *fregs_buf, size_t len)
141 struct gdbarch *gdbarch = regcache->arch ();
142 gdb_byte *fregs = (gdb_byte *) fregs_buf ;
143 int fregset_num = ARRAY_SIZE (csky_fregset_offset);
146 gdb_assert (len >= SIZEOF_CSKY_FREGSET);
147 for (regno = 0; regno < fregset_num; regno++)
149 if ((regnum == csky_fregset_offset[regno] || regnum == -1)
150 && csky_fregset_offset[regno] != -1)
152 offset += register_size (gdbarch, csky_fregset_offset[regno]);
153 regcache->raw_collect (regno, fregs + offset);
158 static const struct regset csky_regset_general =
165 static const struct regset csky_regset_float =
172 /* Iterate over core file register note sections. */
175 csky_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
176 iterate_over_regset_sections_cb *cb,
178 const struct regcache *regcache)
180 cb (".reg", sizeof (csky_gregset_offset), sizeof (csky_gregset_offset),
181 &csky_regset_general, NULL, cb_data);
182 cb (".reg2", sizeof (csky_fregset_offset), sizeof (csky_fregset_offset),
183 &csky_regset_float, NULL, cb_data);
187 csky_linux_rt_sigreturn_init (const struct tramp_frame *self,
188 struct frame_info *this_frame,
189 struct trad_frame_cache *this_cache,
193 CORE_ADDR sp = get_frame_register_unsigned (this_frame, 14);
195 CORE_ADDR base = sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE
196 + CSKY_UCONTEXT_SIGCONTEXT
197 + CSKY_SIGCONTEXT_SC_USP
198 + CSKY_SIGCONTEXT_SC_A0;
200 /* Set addrs of R0 ~ R13. */
201 for (i = 0; i < 14; i++)
202 trad_frame_set_reg_addr (this_cache, i, base + i * 4);
204 /* Set addrs of SP(R14) and R15. */
205 trad_frame_set_reg_addr (this_cache, 14, base - 4);
206 trad_frame_set_reg_addr (this_cache, 15, base + 4 * 14);
208 /* Set addrs of R16 ~ R31. */
209 for (i = 15; i < 31; i++)
210 trad_frame_set_reg_addr (this_cache, i, base + i * 4);
212 /* Set addrs of PSR and PC. */
213 trad_frame_set_reg_addr (this_cache, 89, base + 4 * 33);
214 trad_frame_set_reg_addr (this_cache, 72, base + 4 * 34);
216 trad_frame_set_id (this_cache, frame_id_build (sp, func));
219 static struct tramp_frame
220 csky_linux_rt_sigreturn_tramp_frame = {
224 { CSKY_MOVI_R7_173, ULONGEST_MAX },
225 { CSKY_TRAP_0, ULONGEST_MAX },
226 { TRAMP_SENTINEL_INSN }
228 csky_linux_rt_sigreturn_init
231 /* Hook function for gdbarch_register_osabi. */
234 csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
236 linux_init_abi (info, gdbarch);
238 /* Shared library handling. */
239 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
240 set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
241 set_solib_svr4_fetch_link_map_offsets (gdbarch,
242 svr4_ilp32_fetch_link_map_offsets);
244 /* Enable TLS support. */
245 set_gdbarch_fetch_tls_load_module_address (gdbarch,
246 svr4_fetch_objfile_link_map);
248 /* Core file support. */
249 set_gdbarch_iterate_over_regset_sections (
250 gdbarch, csky_linux_iterate_over_regset_sections);
252 /* Append tramp frame unwinder for SIGNAL. */
254 tramp_frame_prepend_unwinder (gdbarch,
255 &csky_linux_rt_sigreturn_tramp_frame);
259 _initialize_csky_linux_tdep (void)
261 gdbarch_register_osabi (bfd_arch_csky, 0, GDB_OSABI_LINUX,
262 csky_linux_init_abi);