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 24 struct 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 33 enum 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_RCR_REGNUM = 51, /* Recover Counter (also known as cr0) */ 55 HPPA_PID0_REGNUM = 52, /* Protection ID */ 56 HPPA_PID1_REGNUM = 53, /* Protection ID */ 57 HPPA_PID2_REGNUM = 55, /* Protection ID */ 58 HPPA_PID3_REGNUM = 56, /* Protection ID */ 59 HPPA_CCR_REGNUM = 54, /* Coprocessor Configuration Register */ 60 HPPA_TR0_REGNUM = 57, /* Temporary Registers (cr24 -> cr31) */ 61 HPPA_CR27_REGNUM = 60, /* Base register for thread-local storage, cr27 */ 62 HPPA_FP0_REGNUM = 64, /* First floating-point. */ 63 HPPA_FP4_REGNUM = 72, 64 65 HPPA_ARG0_REGNUM = 26, /* The first argument of a callee. */ 66 HPPA_ARG1_REGNUM = 25, /* The second argument of a callee. */ 67 HPPA_ARG2_REGNUM = 24, /* The third argument of a callee. */ 68 HPPA_ARG3_REGNUM = 23 /* The fourth argument of a callee. */ 69 }; 70 71 /* Target-dependent structure in gdbarch. */ 72 struct gdbarch_tdep 73 { 74 /* The number of bytes in an address. For now, this field is designed 75 to allow us to differentiate hppa32 from hppa64 targets. */ 76 int bytes_per_address; 77 78 /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux 79 system. */ 80 int is_elf; 81 82 /* Given a function address, try to find the global pointer for the 83 corresponding shared object. */ 84 CORE_ADDR (*find_global_pointer) (struct value *); 85 }; 86 87 /* 88 * Unwind table and descriptor. 89 */ 90 91 struct unwind_table_entry 92 { 93 CORE_ADDR region_start; 94 CORE_ADDR region_end; 95 96 unsigned int Cannot_unwind:1; /* 0 */ 97 unsigned int Millicode:1; /* 1 */ 98 unsigned int Millicode_save_sr0:1; /* 2 */ 99 unsigned int Region_description:2; /* 3..4 */ 100 unsigned int reserved1:1; /* 5 */ 101 unsigned int Entry_SR:1; /* 6 */ 102 unsigned int Entry_FR:4; /* number saved *//* 7..10 */ 103 unsigned int Entry_GR:5; /* number saved *//* 11..15 */ 104 unsigned int Args_stored:1; /* 16 */ 105 unsigned int Variable_Frame:1; /* 17 */ 106 unsigned int Separate_Package_Body:1; /* 18 */ 107 unsigned int Frame_Extension_Millicode:1; /* 19 */ 108 unsigned int Stack_Overflow_Check:1; /* 20 */ 109 unsigned int Two_Instruction_SP_Increment:1; /* 21 */ 110 unsigned int Ada_Region:1; /* 22 */ 111 unsigned int cxx_info:1; /* 23 */ 112 unsigned int cxx_try_catch:1; /* 24 */ 113 unsigned int sched_entry_seq:1; /* 25 */ 114 unsigned int reserved2:1; /* 26 */ 115 unsigned int Save_SP:1; /* 27 */ 116 unsigned int Save_RP:1; /* 28 */ 117 unsigned int Save_MRP_in_frame:1; /* 29 */ 118 unsigned int extn_ptr_defined:1; /* 30 */ 119 unsigned int Cleanup_defined:1; /* 31 */ 120 121 unsigned int MPE_XL_interrupt_marker:1; /* 0 */ 122 unsigned int HP_UX_interrupt_marker:1; /* 1 */ 123 unsigned int Large_frame:1; /* 2 */ 124 unsigned int Pseudo_SP_Set:1; /* 3 */ 125 unsigned int reserved4:1; /* 4 */ 126 unsigned int Total_frame_size:27; /* 5..31 */ 127 128 /* This is *NOT* part of an actual unwind_descriptor in an object 129 file. It is *ONLY* part of the "internalized" descriptors that 130 we create from those in a file. 131 */ 132 struct 133 { 134 unsigned int stub_type:4; /* 0..3 */ 135 unsigned int padding:28; /* 4..31 */ 136 } 137 stub_unwind; 138 }; 139 140 /* HP linkers also generate unwinds for various linker-generated stubs. 141 GDB reads in the stubs from the $UNWIND_END$ subspace, then 142 "converts" them into normal unwind entries using some of the reserved 143 fields to store the stub type. */ 144 145 /* The gaps represent linker stubs used in MPE and space for future 146 expansion. */ 147 enum unwind_stub_types 148 { 149 LONG_BRANCH = 1, 150 PARAMETER_RELOCATION = 2, 151 EXPORT = 10, 152 IMPORT = 11, 153 IMPORT_SHLIB = 12, 154 }; 155 156 struct unwind_table_entry *find_unwind_entry (CORE_ADDR); 157 158 /* We use the objfile->obj_private pointer for two things: 159 * 1. An unwind table; 160 * 161 * 2. A pointer to any associated shared library object. 162 * 163 * #defines are used to help refer to these objects. 164 */ 165 166 /* Info about the unwind table associated with an object file. 167 * This is hung off of the "objfile->obj_private" pointer, and 168 * is allocated in the objfile's psymbol obstack. This allows 169 * us to have unique unwind info for each executable and shared 170 * library that we are debugging. 171 */ 172 struct hppa_unwind_info 173 { 174 struct unwind_table_entry *table; /* Pointer to unwind info */ 175 struct unwind_table_entry *cache; /* Pointer to last entry we found */ 176 int last; /* Index of last entry */ 177 }; 178 179 struct hppa_objfile_private 180 { 181 struct hppa_unwind_info *unwind_info; /* a pointer */ 182 struct so_list *so_info; /* a pointer */ 183 CORE_ADDR dp; 184 }; 185 186 extern const struct objfile_data *hppa_objfile_priv_data; 187 188 int hppa_get_field (unsigned word, int from, int to); 189 int hppa_extract_5_load (unsigned int); 190 unsigned hppa_extract_5R_store (unsigned int); 191 unsigned hppa_extract_5r_store (unsigned int); 192 int hppa_extract_17 (unsigned int); 193 int hppa_extract_21 (unsigned); 194 int hppa_extract_14 (unsigned); 195 int hppa_low_sign_extend (unsigned int, unsigned int); 196 int hppa_sign_extend (unsigned int, unsigned int); 197 CORE_ADDR hppa_symbol_address(const char *sym); 198 199 void 200 hppa_frame_prev_register_helper (struct frame_info *next_frame, 201 struct trad_frame_saved_reg *saved_regs, 202 int regnum, int *optimizedp, 203 enum lval_type *lvalp, CORE_ADDR *addrp, 204 int *realnump, void *valuep); 205 206 #endif /* HPPA_TDEP_H */ 207