| 1 | /* Common target dependent code for GDB on HPPA systems. |
| 2 | Copyright 2003 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 | enum { HPPA_INSTRUCTION_SIZE = 4 }; |
| 25 | |
| 26 | /* Target-dependent structure in gdbarch. */ |
| 27 | struct gdbarch_tdep |
| 28 | { |
| 29 | /* The number of bytes in an address. For now, this field is designed |
| 30 | to allow us to differentiate hppa32 from hppa64 targets. */ |
| 31 | int bytes_per_address; |
| 32 | }; |
| 33 | |
| 34 | /* |
| 35 | * Unwind table and descriptor. |
| 36 | */ |
| 37 | |
| 38 | struct unwind_table_entry |
| 39 | { |
| 40 | CORE_ADDR region_start; |
| 41 | CORE_ADDR region_end; |
| 42 | |
| 43 | unsigned int Cannot_unwind:1; /* 0 */ |
| 44 | unsigned int Millicode:1; /* 1 */ |
| 45 | unsigned int Millicode_save_sr0:1; /* 2 */ |
| 46 | unsigned int Region_description:2; /* 3..4 */ |
| 47 | unsigned int reserved1:1; /* 5 */ |
| 48 | unsigned int Entry_SR:1; /* 6 */ |
| 49 | unsigned int Entry_FR:4; /* number saved *//* 7..10 */ |
| 50 | unsigned int Entry_GR:5; /* number saved *//* 11..15 */ |
| 51 | unsigned int Args_stored:1; /* 16 */ |
| 52 | unsigned int Variable_Frame:1; /* 17 */ |
| 53 | unsigned int Separate_Package_Body:1; /* 18 */ |
| 54 | unsigned int Frame_Extension_Millicode:1; /* 19 */ |
| 55 | unsigned int Stack_Overflow_Check:1; /* 20 */ |
| 56 | unsigned int Two_Instruction_SP_Increment:1; /* 21 */ |
| 57 | unsigned int Ada_Region:1; /* 22 */ |
| 58 | unsigned int cxx_info:1; /* 23 */ |
| 59 | unsigned int cxx_try_catch:1; /* 24 */ |
| 60 | unsigned int sched_entry_seq:1; /* 25 */ |
| 61 | unsigned int reserved2:1; /* 26 */ |
| 62 | unsigned int Save_SP:1; /* 27 */ |
| 63 | unsigned int Save_RP:1; /* 28 */ |
| 64 | unsigned int Save_MRP_in_frame:1; /* 29 */ |
| 65 | unsigned int extn_ptr_defined:1; /* 30 */ |
| 66 | unsigned int Cleanup_defined:1; /* 31 */ |
| 67 | |
| 68 | unsigned int MPE_XL_interrupt_marker:1; /* 0 */ |
| 69 | unsigned int HP_UX_interrupt_marker:1; /* 1 */ |
| 70 | unsigned int Large_frame:1; /* 2 */ |
| 71 | unsigned int Pseudo_SP_Set:1; /* 3 */ |
| 72 | unsigned int reserved4:1; /* 4 */ |
| 73 | unsigned int Total_frame_size:27; /* 5..31 */ |
| 74 | |
| 75 | /* This is *NOT* part of an actual unwind_descriptor in an object |
| 76 | file. It is *ONLY* part of the "internalized" descriptors that |
| 77 | we create from those in a file. |
| 78 | */ |
| 79 | struct |
| 80 | { |
| 81 | unsigned int stub_type:4; /* 0..3 */ |
| 82 | unsigned int padding:28; /* 4..31 */ |
| 83 | } |
| 84 | stub_unwind; |
| 85 | }; |
| 86 | |
| 87 | /* HP linkers also generate unwinds for various linker-generated stubs. |
| 88 | GDB reads in the stubs from the $UNWIND_END$ subspace, then |
| 89 | "converts" them into normal unwind entries using some of the reserved |
| 90 | fields to store the stub type. */ |
| 91 | |
| 92 | /* The gaps represent linker stubs used in MPE and space for future |
| 93 | expansion. */ |
| 94 | enum unwind_stub_types |
| 95 | { |
| 96 | LONG_BRANCH = 1, |
| 97 | PARAMETER_RELOCATION = 2, |
| 98 | EXPORT = 10, |
| 99 | IMPORT = 11, |
| 100 | IMPORT_SHLIB = 12, |
| 101 | }; |
| 102 | |
| 103 | /* We use the objfile->obj_private pointer for two things: |
| 104 | * 1. An unwind table; |
| 105 | * |
| 106 | * 2. A pointer to any associated shared library object. |
| 107 | * |
| 108 | * #defines are used to help refer to these objects. |
| 109 | */ |
| 110 | |
| 111 | /* Info about the unwind table associated with an object file. |
| 112 | * This is hung off of the "objfile->obj_private" pointer, and |
| 113 | * is allocated in the objfile's psymbol obstack. This allows |
| 114 | * us to have unique unwind info for each executable and shared |
| 115 | * library that we are debugging. |
| 116 | */ |
| 117 | struct hppa_unwind_info |
| 118 | { |
| 119 | struct unwind_table_entry *table; /* Pointer to unwind info */ |
| 120 | struct unwind_table_entry *cache; /* Pointer to last entry we found */ |
| 121 | int last; /* Index of last entry */ |
| 122 | }; |
| 123 | |
| 124 | struct hppa_objfile_private |
| 125 | { |
| 126 | struct hppa_unwind_info *unwind_info; /* a pointer */ |
| 127 | struct so_list *so_info; /* a pointer */ |
| 128 | CORE_ADDR dp; |
| 129 | }; |
| 130 | |
| 131 | extern const struct objfile_data *hppa_objfile_priv_data; |
| 132 | |
| 133 | #endif /* HPPA_TDEP_H */ |