| 1 | /* Target-dependent code for GNU/Linux on CSKY. |
| 2 | |
| 3 | Copyright (C) 2012-2019 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by C-SKY Microsystems and Mentor Graphics. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 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. |
| 13 | |
| 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. |
| 18 | |
| 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/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "osabi.h" |
| 24 | #include "glibc-tdep.h" |
| 25 | #include "linux-tdep.h" |
| 26 | #include "gdbarch.h" |
| 27 | #include "solib-svr4.h" |
| 28 | #include "regset.h" |
| 29 | #include "trad-frame.h" |
| 30 | #include "tramp-frame.h" |
| 31 | #include "csky-tdep.h" |
| 32 | |
| 33 | /* Functions, definitions, and data structures for C-Sky core file debug. */ |
| 34 | |
| 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 |
| 39 | |
| 40 | /* Offset mapping table from core_section to regcache of general |
| 41 | registers for ck810. */ |
| 42 | static const int csky_gregset_offset[] = |
| 43 | { |
| 44 | 72, 1, 0, 89, 2, /* pc, r1, r0, psr, r2. */ |
| 45 | 3, 4, 5, 6, 7, /* r3 ~ r32. */ |
| 46 | 8, 9, 10, 11, 12, |
| 47 | 13, 14, 15, 16, 17, |
| 48 | 18, 19, 20, 21, 22, |
| 49 | 23, 24, 25, 26, 27, |
| 50 | 28, 29, 30, 31 |
| 51 | }; |
| 52 | |
| 53 | /* Offset mapping table from core_section to regcache of float |
| 54 | registers for ck810. */ |
| 55 | |
| 56 | static const int csky_fregset_offset[] = |
| 57 | { |
| 58 | 122, 123, 40, 41, 42, /* fcr, fesr, fr0 ~ fr2. */ |
| 59 | 43, 44, 45, 46, 47, /* fr3 ~ fr15. */ |
| 60 | 48, 49, 50, 51, 52, |
| 61 | 53, 54, 55 |
| 62 | }; |
| 63 | |
| 64 | /* Implement the supply_regset hook for GP registers in core files. */ |
| 65 | |
| 66 | static void |
| 67 | csky_supply_gregset (const struct regset *regset, |
| 68 | struct regcache *regcache, int regnum, |
| 69 | const void *regs, size_t len) |
| 70 | { |
| 71 | int i, gregset_num; |
| 72 | const gdb_byte *gregs = (const gdb_byte *) regs ; |
| 73 | |
| 74 | gdb_assert (len >= SIZEOF_CSKY_GREGSET); |
| 75 | gregset_num = ARRAY_SIZE (csky_gregset_offset); |
| 76 | |
| 77 | for (i = 0; i < gregset_num; i++) |
| 78 | { |
| 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); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /* Implement the collect_regset hook for GP registers in core files. */ |
| 86 | |
| 87 | static void |
| 88 | csky_collect_gregset (const struct regset *regset, |
| 89 | const struct regcache *regcache, |
| 90 | int regnum, void *gregs_buf, size_t len) |
| 91 | { |
| 92 | int regno, gregset_num; |
| 93 | gdb_byte *gregs = (gdb_byte *) gregs_buf ; |
| 94 | |
| 95 | gdb_assert (len >= SIZEOF_CSKY_GREGSET); |
| 96 | gregset_num = ARRAY_SIZE (csky_gregset_offset); |
| 97 | |
| 98 | for (regno = 0; regno < gregset_num; regno++) |
| 99 | { |
| 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]); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | /* Implement the supply_regset hook for FP registers in core files. */ |
| 108 | |
| 109 | static void |
| 110 | csky_supply_fregset (const struct regset *regset, |
| 111 | struct regcache *regcache, int regnum, |
| 112 | const void *regs, size_t len) |
| 113 | { |
| 114 | int i; |
| 115 | int offset = 0; |
| 116 | struct gdbarch *gdbarch = regcache->arch (); |
| 117 | const gdb_byte *fregs = (const gdb_byte *) regs; |
| 118 | int fregset_num = ARRAY_SIZE (csky_fregset_offset); |
| 119 | |
| 120 | gdb_assert (len >= SIZEOF_CSKY_FREGSET); |
| 121 | for (i = 0; i < fregset_num; i++) |
| 122 | { |
| 123 | if ((regnum == csky_fregset_offset[i] || regnum == -1) |
| 124 | && csky_fregset_offset[i] != -1) |
| 125 | { |
| 126 | int num = csky_fregset_offset[i]; |
| 127 | offset += register_size (gdbarch, num); |
| 128 | regcache->raw_supply (csky_fregset_offset[i], fregs + offset); |
| 129 | } |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | /* Implement the collect_regset hook for FP registers in core files. */ |
| 134 | |
| 135 | static void |
| 136 | csky_collect_fregset (const struct regset *regset, |
| 137 | const struct regcache *regcache, |
| 138 | int regnum, void *fregs_buf, size_t len) |
| 139 | { |
| 140 | int regno; |
| 141 | struct gdbarch *gdbarch = regcache->arch (); |
| 142 | gdb_byte *fregs = (gdb_byte *) fregs_buf ; |
| 143 | int fregset_num = ARRAY_SIZE (csky_fregset_offset); |
| 144 | int offset = 0; |
| 145 | |
| 146 | gdb_assert (len >= SIZEOF_CSKY_FREGSET); |
| 147 | for (regno = 0; regno < fregset_num; regno++) |
| 148 | { |
| 149 | if ((regnum == csky_fregset_offset[regno] || regnum == -1) |
| 150 | && csky_fregset_offset[regno] != -1) |
| 151 | { |
| 152 | offset += register_size (gdbarch, csky_fregset_offset[regno]); |
| 153 | regcache->raw_collect (regno, fregs + offset); |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | static const struct regset csky_regset_general = |
| 159 | { |
| 160 | NULL, |
| 161 | csky_supply_gregset, |
| 162 | csky_collect_gregset |
| 163 | }; |
| 164 | |
| 165 | static const struct regset csky_regset_float = |
| 166 | { |
| 167 | NULL, |
| 168 | csky_supply_fregset, |
| 169 | csky_collect_fregset |
| 170 | }; |
| 171 | |
| 172 | /* Iterate over core file register note sections. */ |
| 173 | |
| 174 | static void |
| 175 | csky_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, |
| 176 | iterate_over_regset_sections_cb *cb, |
| 177 | void *cb_data, |
| 178 | const struct regcache *regcache) |
| 179 | { |
| 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); |
| 184 | } |
| 185 | |
| 186 | static void |
| 187 | csky_linux_rt_sigreturn_init (const struct tramp_frame *self, |
| 188 | struct frame_info *this_frame, |
| 189 | struct trad_frame_cache *this_cache, |
| 190 | CORE_ADDR func) |
| 191 | { |
| 192 | int i; |
| 193 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, 14); |
| 194 | |
| 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; |
| 199 | |
| 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); |
| 203 | |
| 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); |
| 207 | |
| 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); |
| 211 | |
| 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); |
| 215 | |
| 216 | trad_frame_set_id (this_cache, frame_id_build (sp, func)); |
| 217 | } |
| 218 | |
| 219 | static struct tramp_frame |
| 220 | csky_linux_rt_sigreturn_tramp_frame = { |
| 221 | SIGTRAMP_FRAME, |
| 222 | 4, |
| 223 | { |
| 224 | { CSKY_MOVI_R7_173, ULONGEST_MAX }, |
| 225 | { CSKY_TRAP_0, ULONGEST_MAX }, |
| 226 | { TRAMP_SENTINEL_INSN } |
| 227 | }, |
| 228 | csky_linux_rt_sigreturn_init |
| 229 | }; |
| 230 | |
| 231 | /* Hook function for gdbarch_register_osabi. */ |
| 232 | |
| 233 | static void |
| 234 | csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 235 | { |
| 236 | linux_init_abi (info, gdbarch); |
| 237 | |
| 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); |
| 243 | |
| 244 | /* Enable TLS support. */ |
| 245 | set_gdbarch_fetch_tls_load_module_address (gdbarch, |
| 246 | svr4_fetch_objfile_link_map); |
| 247 | |
| 248 | /* Core file support. */ |
| 249 | set_gdbarch_iterate_over_regset_sections ( |
| 250 | gdbarch, csky_linux_iterate_over_regset_sections); |
| 251 | |
| 252 | /* Append tramp frame unwinder for SIGNAL. */ |
| 253 | |
| 254 | tramp_frame_prepend_unwinder (gdbarch, |
| 255 | &csky_linux_rt_sigreturn_tramp_frame); |
| 256 | } |
| 257 | |
| 258 | void |
| 259 | _initialize_csky_linux_tdep (void) |
| 260 | { |
| 261 | gdbarch_register_osabi (bfd_arch_csky, 0, GDB_OSABI_LINUX, |
| 262 | csky_linux_init_abi); |
| 263 | } |