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 23struct trad_frame_saved_reg; 24struct objfile; 25struct so_list; 26 27/* Register numbers of various important registers. */ 28 29enum 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. */ 85struct 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 124struct 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. */ 180enum unwind_stub_types 181 { 182 LONG_BRANCH = 1, 183 PARAMETER_RELOCATION = 2, 184 EXPORT = 10, 185 IMPORT = 11, 186 IMPORT_SHLIB = 12, 187 }; 188 189struct unwind_table_entry *find_unwind_entry (CORE_ADDR); 190 191int hppa_get_field (unsigned word, int from, int to); 192int hppa_extract_5_load (unsigned int); 193unsigned hppa_extract_5R_store (unsigned int); 194unsigned hppa_extract_5r_store (unsigned int); 195int hppa_extract_17 (unsigned int); 196int hppa_extract_21 (unsigned); 197int hppa_extract_14 (unsigned); 198CORE_ADDR hppa_symbol_address(const char *sym); 199 200extern 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 205extern CORE_ADDR hppa_read_pc (struct regcache *regcache); 206extern void hppa_write_pc (struct regcache *regcache, CORE_ADDR pc); 207extern CORE_ADDR hppa_unwind_pc (struct gdbarch *gdbarch, 208 struct frame_info *next_frame); 209 210extern struct bound_minimal_symbol 211 hppa_lookup_stub_minimal_symbol (const char *name, 212 enum unwind_stub_types stub_type); 213 214extern int hppa_in_solib_call_trampoline (struct gdbarch *gdbarch, 215 CORE_ADDR pc); 216extern CORE_ADDR hppa_skip_trampoline_code (struct frame_info *, CORE_ADDR pc); 217 218void _initialize_hppabsd_tdep (void); 219 220#endif /* hppa-tdep.h */ 221