1/* Common target dependent code for GDB on HPPA systems. 2 Copyright 2003, 2004 Free Software Foundation, Inc. 3 4 This file is part of GDB. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 59 Temple Place - Suite 330, 19 Boston, MA 02111-1307, USA. */ 20 21#ifndef HPPA_TDEP_H 22#define HPPA_TDEP_H 23 24struct trad_frame_saved_reg; 25 26/* Register numbers of various important registers. 27 Note that some of these values are "real" register numbers, 28 and correspond to the general registers of the machine, 29 and some are "phony" register numbers which are too large 30 to be actual register numbers as far as the user is concerned 31 but do serve to get the desired values when passed to read_register. */ 32 33enum hppa_regnum 34{ 35 HPPA_R0_REGNUM = 0, /* Doesn't actually exist, used as base for 36 other r registers. */ 37 HPPA_R1_REGNUM = 1, 38 HPPA_FLAGS_REGNUM = 0, /* Various status flags */ 39 HPPA_RP_REGNUM = 2, /* return pointer */ 40 HPPA_FP_REGNUM = 3, /* The ABI's frame pointer, when used */ 41 HPPA_SP_REGNUM = 30, /* Stack pointer. */ 42 HPPA_R31_REGNUM = 31, 43 HPPA_SAR_REGNUM = 32, /* Shift Amount Register */ 44 HPPA_IPSW_REGNUM = 41, /* Interrupt Processor Status Word */ 45 HPPA_PCOQ_HEAD_REGNUM = 33, /* instruction offset queue head */ 46 HPPA_PCSQ_HEAD_REGNUM = 34, /* instruction space queue head */ 47 HPPA_PCOQ_TAIL_REGNUM = 35, /* instruction offset queue tail */ 48 HPPA_PCSQ_TAIL_REGNUM = 36, /* instruction space queue tail */ 49 HPPA_EIEM_REGNUM = 37, /* External Interrupt Enable Mask */ 50 HPPA_IIR_REGNUM = 38, /* Interrupt Instruction Register */ 51 HPPA_ISR_REGNUM = 39, /* Interrupt Space Register */ 52 HPPA_IOR_REGNUM = 40, /* Interrupt Offset Register */ 53 HPPA_SR4_REGNUM = 43, /* space register 4 */ 54 HPPA_SR0_REGNUM = 44, /* space register 0 */ 55 HPPA_SR1_REGNUM = 45, /* space register 1 */ 56 HPPA_SR2_REGNUM = 46, /* space register 2 */ 57 HPPA_SR3_REGNUM = 47, /* space register 3 */ 58 HPPA_SR5_REGNUM = 48, /* space register 5 */ 59 HPPA_SR6_REGNUM = 49, /* space register 6 */ 60 HPPA_SR7_REGNUM = 50, /* space register 7 */ 61 HPPA_RCR_REGNUM = 51, /* Recover Counter (also known as cr0) */ 62 HPPA_PID0_REGNUM = 52, /* Protection ID */ 63 HPPA_PID1_REGNUM = 53, /* Protection ID */ 64 HPPA_PID2_REGNUM = 55, /* Protection ID */ 65 HPPA_PID3_REGNUM = 56, /* Protection ID */ 66 HPPA_CCR_REGNUM = 54, /* Coprocessor Configuration Register */ 67 HPPA_TR0_REGNUM = 57, /* Temporary Registers (cr24 -> cr31) */ 68 HPPA_CR26_REGNUM = 59, 69 HPPA_CR27_REGNUM = 60, /* Base register for thread-local storage, cr27 */ 70 HPPA_FP0_REGNUM = 64, /* First floating-point. */ 71 HPPA_FP4_REGNUM = 72, 72 73 HPPA_ARG0_REGNUM = 26, /* The first argument of a callee. */ 74 HPPA_ARG1_REGNUM = 25, /* The second argument of a callee. */ 75 HPPA_ARG2_REGNUM = 24, /* The third argument of a callee. */ 76 HPPA_ARG3_REGNUM = 23 /* The fourth argument of a callee. */ 77}; 78 79/* Target-dependent structure in gdbarch. */ 80struct gdbarch_tdep 81{ 82 /* The number of bytes in an address. For now, this field is designed 83 to allow us to differentiate hppa32 from hppa64 targets. */ 84 int bytes_per_address; 85 86 /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux 87 system. */ 88 int is_elf; 89 90 /* Given a function address, try to find the global pointer for the 91 corresponding shared object. */ 92 CORE_ADDR (*find_global_pointer) (struct value *); 93}; 94 95/* 96 * Unwind table and descriptor. 97 */ 98 99struct unwind_table_entry 100 { 101 CORE_ADDR region_start; 102 CORE_ADDR region_end; 103 104 unsigned int Cannot_unwind:1; /* 0 */ 105 unsigned int Millicode:1; /* 1 */ 106 unsigned int Millicode_save_sr0:1; /* 2 */ 107 unsigned int Region_description:2; /* 3..4 */ 108 unsigned int reserved1:1; /* 5 */ 109 unsigned int Entry_SR:1; /* 6 */ 110 unsigned int Entry_FR:4; /* number saved *//* 7..10 */ 111 unsigned int Entry_GR:5; /* number saved *//* 11..15 */ 112 unsigned int Args_stored:1; /* 16 */ 113 unsigned int Variable_Frame:1; /* 17 */ 114 unsigned int Separate_Package_Body:1; /* 18 */ 115 unsigned int Frame_Extension_Millicode:1; /* 19 */ 116 unsigned int Stack_Overflow_Check:1; /* 20 */ 117 unsigned int Two_Instruction_SP_Increment:1; /* 21 */ 118 unsigned int Ada_Region:1; /* 22 */ 119 unsigned int cxx_info:1; /* 23 */ 120 unsigned int cxx_try_catch:1; /* 24 */ 121 unsigned int sched_entry_seq:1; /* 25 */ 122 unsigned int reserved2:1; /* 26 */ 123 unsigned int Save_SP:1; /* 27 */ 124 unsigned int Save_RP:1; /* 28 */ 125 unsigned int Save_MRP_in_frame:1; /* 29 */ 126 unsigned int extn_ptr_defined:1; /* 30 */ 127 unsigned int Cleanup_defined:1; /* 31 */ 128 129 unsigned int MPE_XL_interrupt_marker:1; /* 0 */ 130 unsigned int HP_UX_interrupt_marker:1; /* 1 */ 131 unsigned int Large_frame:1; /* 2 */ 132 unsigned int Pseudo_SP_Set:1; /* 3 */ 133 unsigned int reserved4:1; /* 4 */ 134 unsigned int Total_frame_size:27; /* 5..31 */ 135 136 /* This is *NOT* part of an actual unwind_descriptor in an object 137 file. It is *ONLY* part of the "internalized" descriptors that 138 we create from those in a file. 139 */ 140 struct 141 { 142 unsigned int stub_type:4; /* 0..3 */ 143 unsigned int padding:28; /* 4..31 */ 144 } 145 stub_unwind; 146 }; 147 148/* HP linkers also generate unwinds for various linker-generated stubs. 149 GDB reads in the stubs from the $UNWIND_END$ subspace, then 150 "converts" them into normal unwind entries using some of the reserved 151 fields to store the stub type. */ 152 153/* The gaps represent linker stubs used in MPE and space for future 154 expansion. */ 155enum unwind_stub_types 156 { 157 LONG_BRANCH = 1, 158 PARAMETER_RELOCATION = 2, 159 EXPORT = 10, 160 IMPORT = 11, 161 IMPORT_SHLIB = 12, 162 }; 163 164struct unwind_table_entry *find_unwind_entry (CORE_ADDR); 165 166/* We use the objfile->obj_private pointer for two things: 167 * 1. An unwind table; 168 * 169 * 2. A pointer to any associated shared library object. 170 * 171 * #defines are used to help refer to these objects. 172 */ 173 174/* Info about the unwind table associated with an object file. 175 * This is hung off of the "objfile->obj_private" pointer, and 176 * is allocated in the objfile's psymbol obstack. This allows 177 * us to have unique unwind info for each executable and shared 178 * library that we are debugging. 179 */ 180struct hppa_unwind_info 181 { 182 struct unwind_table_entry *table; /* Pointer to unwind info */ 183 struct unwind_table_entry *cache; /* Pointer to last entry we found */ 184 int last; /* Index of last entry */ 185 }; 186 187struct hppa_objfile_private 188 { 189 struct hppa_unwind_info *unwind_info; /* a pointer */ 190 struct so_list *so_info; /* a pointer */ 191 CORE_ADDR dp; 192 }; 193 194extern const struct objfile_data *hppa_objfile_priv_data; 195 196int hppa_get_field (unsigned word, int from, int to); 197int hppa_extract_5_load (unsigned int); 198unsigned hppa_extract_5R_store (unsigned int); 199unsigned hppa_extract_5r_store (unsigned int); 200int hppa_extract_17 (unsigned int); 201int hppa_extract_21 (unsigned); 202int hppa_extract_14 (unsigned); 203int hppa_low_sign_extend (unsigned int, unsigned int); 204int hppa_sign_extend (unsigned int, unsigned int); 205CORE_ADDR hppa_symbol_address(const char *sym); 206 207void 208hppa_frame_prev_register_helper (struct frame_info *next_frame, 209 struct trad_frame_saved_reg *saved_regs, 210 int regnum, int *optimizedp, 211 enum lval_type *lvalp, CORE_ADDR *addrp, 212 int *realnump, void *valuep); 213 214#endif /* HPPA_TDEP_H */ 215