| 1 | /* Target-dependent code for the HP PA-RISC architecture. |
| 2 | |
| 3 | Copyright (C) 2003-2020 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 | #ifndef HPPA_TDEP_H |
| 21 | #define HPPA_TDEP_H |
| 22 | |
| 23 | struct trad_frame_saved_reg; |
| 24 | struct objfile; |
| 25 | struct so_list; |
| 26 | |
| 27 | /* Register numbers of various important registers. */ |
| 28 | |
| 29 | enum hppa_regnum |
| 30 | { |
| 31 | HPPA_R0_REGNUM = 0, /* Doesn't actually exist, used as base for |
| 32 | other r registers. */ |
| 33 | HPPA_R1_REGNUM = 1, |
| 34 | HPPA_FLAGS_REGNUM = 0, /* Various status flags */ |
| 35 | HPPA_RP_REGNUM = 2, /* return pointer */ |
| 36 | HPPA_FP_REGNUM = 3, /* The ABI's frame pointer, when used */ |
| 37 | HPPA_DP_REGNUM = 27, |
| 38 | HPPA_RET0_REGNUM = 28, |
| 39 | HPPA_RET1_REGNUM = 29, |
| 40 | HPPA_SP_REGNUM = 30, /* Stack pointer. */ |
| 41 | HPPA_R31_REGNUM = 31, |
| 42 | HPPA_SAR_REGNUM = 32, /* Shift Amount Register */ |
| 43 | HPPA_IPSW_REGNUM = 41, /* Interrupt Processor Status Word */ |
| 44 | HPPA_PCOQ_HEAD_REGNUM = 33, /* instruction offset queue head */ |
| 45 | HPPA_PCSQ_HEAD_REGNUM = 34, /* instruction space queue head */ |
| 46 | HPPA_PCOQ_TAIL_REGNUM = 35, /* instruction offset queue tail */ |
| 47 | HPPA_PCSQ_TAIL_REGNUM = 36, /* instruction space queue tail */ |
| 48 | HPPA_EIEM_REGNUM = 37, /* External Interrupt Enable Mask */ |
| 49 | HPPA_IIR_REGNUM = 38, /* Interrupt Instruction Register */ |
| 50 | HPPA_ISR_REGNUM = 39, /* Interrupt Space Register */ |
| 51 | HPPA_IOR_REGNUM = 40, /* Interrupt Offset Register */ |
| 52 | HPPA_SR4_REGNUM = 43, /* space register 4 */ |
| 53 | HPPA_SR0_REGNUM = 44, /* space register 0 */ |
| 54 | HPPA_SR1_REGNUM = 45, /* space register 1 */ |
| 55 | HPPA_SR2_REGNUM = 46, /* space register 2 */ |
| 56 | HPPA_SR3_REGNUM = 47, /* space register 3 */ |
| 57 | HPPA_SR5_REGNUM = 48, /* space register 5 */ |
| 58 | HPPA_SR6_REGNUM = 49, /* space register 6 */ |
| 59 | HPPA_SR7_REGNUM = 50, /* space register 7 */ |
| 60 | HPPA_RCR_REGNUM = 51, /* Recover Counter (also known as cr0) */ |
| 61 | HPPA_PID0_REGNUM = 52, /* Protection ID */ |
| 62 | HPPA_PID1_REGNUM = 53, /* Protection ID */ |
| 63 | HPPA_PID2_REGNUM = 55, /* Protection ID */ |
| 64 | HPPA_PID3_REGNUM = 56, /* Protection ID */ |
| 65 | HPPA_CCR_REGNUM = 54, /* Coprocessor Configuration Register */ |
| 66 | HPPA_TR0_REGNUM = 57, /* Temporary Registers (cr24 -> cr31) */ |
| 67 | HPPA_CR26_REGNUM = 59, |
| 68 | HPPA_CR27_REGNUM = 60, /* Base register for thread-local |
| 69 | storage, cr27 */ |
| 70 | HPPA_FP0_REGNUM = 64, /* First floating-point. */ |
| 71 | HPPA_FP4_REGNUM = 72, |
| 72 | HPPA64_FP4_REGNUM = 68, |
| 73 | HPPA_FP31R_REGNUM = 127, /* Last floating-point. */ |
| 74 | |
| 75 | HPPA_ARG0_REGNUM = 26, /* The first argument of a callee. */ |
| 76 | HPPA_ARG1_REGNUM = 25, /* The second argument of a callee. */ |
| 77 | HPPA_ARG2_REGNUM = 24, /* The third argument of a callee. */ |
| 78 | HPPA_ARG3_REGNUM = 23 /* The fourth argument of a callee. */ |
| 79 | }; |
| 80 | |
| 81 | /* Instruction size. */ |
| 82 | #define HPPA_INSN_SIZE 4 |
| 83 | |
| 84 | /* Target-dependent structure in gdbarch. */ |
| 85 | struct gdbarch_tdep |
| 86 | { |
| 87 | /* The number of bytes in an address. For now, this field is designed |
| 88 | to allow us to differentiate hppa32 from hppa64 targets. */ |
| 89 | int bytes_per_address; |
| 90 | |
| 91 | /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux |
| 92 | system. */ |
| 93 | int is_elf; |
| 94 | |
| 95 | /* Given a function address, try to find the global pointer for the |
| 96 | corresponding shared object. */ |
| 97 | CORE_ADDR (*find_global_pointer) (struct gdbarch *, struct value *); |
| 98 | |
| 99 | /* For shared libraries, each call goes through a small piece of |
| 100 | trampoline code in the ".plt" section. IN_SOLIB_CALL_TRAMPOLINE |
| 101 | evaluates to nonzero if we are currently stopped in one of these. */ |
| 102 | int (*in_solib_call_trampoline) (struct gdbarch *gdbarch, CORE_ADDR pc); |
| 103 | |
| 104 | /* For targets that support multiple spaces, we may have additional stubs |
| 105 | in the return path. These stubs are internal to the ABI, and users are |
| 106 | not interested in them. If we detect that we are returning to a stub, |
| 107 | adjust the pc to the real caller. This improves the behavior of commands |
| 108 | that traverse frames such as "up" and "finish". */ |
| 109 | void (*unwind_adjust_stub) (struct frame_info *this_frame, CORE_ADDR base, |
| 110 | struct trad_frame_saved_reg *saved_regs); |
| 111 | |
| 112 | /* These are solib-dependent methods. They are really HPUX only, but |
| 113 | we don't have a HPUX-specific tdep vector at the moment. */ |
| 114 | CORE_ADDR (*solib_thread_start_addr) (struct so_list *so); |
| 115 | CORE_ADDR (*solib_get_got_by_pc) (CORE_ADDR addr); |
| 116 | CORE_ADDR (*solib_get_solib_by_pc) (CORE_ADDR addr); |
| 117 | CORE_ADDR (*solib_get_text_base) (struct objfile *objfile); |
| 118 | }; |
| 119 | |
| 120 | /* |
| 121 | * Unwind table and descriptor. |
| 122 | */ |
| 123 | |
| 124 | struct unwind_table_entry |
| 125 | { |
| 126 | CORE_ADDR region_start; |
| 127 | CORE_ADDR region_end; |
| 128 | |
| 129 | unsigned int Cannot_unwind:1; /* 0 */ |
| 130 | unsigned int Millicode:1; /* 1 */ |
| 131 | unsigned int Millicode_save_sr0:1; /* 2 */ |
| 132 | unsigned int Region_description:2; /* 3..4 */ |
| 133 | unsigned int reserved:1; /* 5 */ |
| 134 | unsigned int Entry_SR:1; /* 6 */ |
| 135 | unsigned int Entry_FR:4; /* number saved *//* 7..10 */ |
| 136 | unsigned int Entry_GR:5; /* number saved *//* 11..15 */ |
| 137 | unsigned int Args_stored:1; /* 16 */ |
| 138 | unsigned int Variable_Frame:1; /* 17 */ |
| 139 | unsigned int Separate_Package_Body:1; /* 18 */ |
| 140 | unsigned int Frame_Extension_Millicode:1; /* 19 */ |
| 141 | unsigned int Stack_Overflow_Check:1; /* 20 */ |
| 142 | unsigned int Two_Instruction_SP_Increment:1; /* 21 */ |
| 143 | unsigned int sr4export:1; /* 22 */ |
| 144 | unsigned int cxx_info:1; /* 23 */ |
| 145 | unsigned int cxx_try_catch:1; /* 24 */ |
| 146 | unsigned int sched_entry_seq:1; /* 25 */ |
| 147 | unsigned int reserved1:1; /* 26 */ |
| 148 | unsigned int Save_SP:1; /* 27 */ |
| 149 | unsigned int Save_RP:1; /* 28 */ |
| 150 | unsigned int Save_MRP_in_frame:1; /* 29 */ |
| 151 | unsigned int save_r19:1; /* 30 */ |
| 152 | unsigned int Cleanup_defined:1; /* 31 */ |
| 153 | |
| 154 | unsigned int MPE_XL_interrupt_marker:1; /* 0 */ |
| 155 | unsigned int HP_UX_interrupt_marker:1; /* 1 */ |
| 156 | unsigned int Large_frame:1; /* 2 */ |
| 157 | unsigned int alloca_frame:1; /* 3 */ |
| 158 | unsigned int reserved2:1; /* 4 */ |
| 159 | unsigned int Total_frame_size:27; /* 5..31 */ |
| 160 | |
| 161 | /* This is *NOT* part of an actual unwind_descriptor in an object |
| 162 | file. It is *ONLY* part of the "internalized" descriptors that |
| 163 | we create from those in a file. */ |
| 164 | |
| 165 | struct |
| 166 | { |
| 167 | unsigned int stub_type:4; /* 0..3 */ |
| 168 | unsigned int padding:28; /* 4..31 */ |
| 169 | } |
| 170 | stub_unwind; |
| 171 | }; |
| 172 | |
| 173 | /* HP linkers also generate unwinds for various linker-generated stubs. |
| 174 | GDB reads in the stubs from the $UNWIND_END$ subspace, then |
| 175 | "converts" them into normal unwind entries using some of the reserved |
| 176 | fields to store the stub type. */ |
| 177 | |
| 178 | /* The gaps represent linker stubs used in MPE and space for future |
| 179 | expansion. */ |
| 180 | enum unwind_stub_types |
| 181 | { |
| 182 | LONG_BRANCH = 1, |
| 183 | PARAMETER_RELOCATION = 2, |
| 184 | EXPORT = 10, |
| 185 | IMPORT = 11, |
| 186 | IMPORT_SHLIB = 12, |
| 187 | }; |
| 188 | |
| 189 | struct unwind_table_entry *find_unwind_entry (CORE_ADDR); |
| 190 | |
| 191 | int hppa_get_field (unsigned word, int from, int to); |
| 192 | int hppa_extract_5_load (unsigned int); |
| 193 | unsigned hppa_extract_5R_store (unsigned int); |
| 194 | unsigned hppa_extract_5r_store (unsigned int); |
| 195 | int hppa_extract_17 (unsigned int); |
| 196 | int hppa_extract_21 (unsigned); |
| 197 | int hppa_extract_14 (unsigned); |
| 198 | CORE_ADDR hppa_symbol_address(const char *sym); |
| 199 | |
| 200 | extern struct value * |
| 201 | hppa_frame_prev_register_helper (struct frame_info *this_frame, |
| 202 | struct trad_frame_saved_reg *saved_regs, |
| 203 | int regnum); |
| 204 | |
| 205 | extern CORE_ADDR hppa_read_pc (struct regcache *regcache); |
| 206 | extern void hppa_write_pc (struct regcache *regcache, CORE_ADDR pc); |
| 207 | extern CORE_ADDR hppa_unwind_pc (struct gdbarch *gdbarch, |
| 208 | struct frame_info *next_frame); |
| 209 | |
| 210 | extern struct bound_minimal_symbol |
| 211 | hppa_lookup_stub_minimal_symbol (const char *name, |
| 212 | enum unwind_stub_types stub_type); |
| 213 | |
| 214 | extern int hppa_in_solib_call_trampoline (struct gdbarch *gdbarch, |
| 215 | CORE_ADDR pc); |
| 216 | extern CORE_ADDR hppa_skip_trampoline_code (struct frame_info *, CORE_ADDR pc); |
| 217 | |
| 218 | #endif /* hppa-tdep.h */ |