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3ff7cf9e | 1 | /* Common target dependent code for GDB on HPPA systems. |
f626a069 | 2 | Copyright 2003, 2004 Free Software Foundation, Inc. |
3ff7cf9e JB |
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 | ||
f626a069 MK |
24 | struct trad_frame_saved_reg; |
25 | ||
7c46b9fb RC |
26 | enum { HPPA_INSTRUCTION_SIZE = 4 }; |
27 | ||
34f75cc1 RC |
28 | /* Register numbers of various important registers. |
29 | Note that some of these values are "real" register numbers, | |
30 | and correspond to the general registers of the machine, | |
31 | and some are "phony" register numbers which are too large | |
32 | to be actual register numbers as far as the user is concerned | |
33 | but do serve to get the desired values when passed to read_register. */ | |
34 | ||
c481d1ca MK |
35 | enum hppa_regnum |
36 | { | |
34f75cc1 RC |
37 | HPPA_R0_REGNUM = 0, /* Doesn't actually exist, used as base for |
38 | other r registers. */ | |
c481d1ca | 39 | HPPA_R1_REGNUM = 1, |
34f75cc1 RC |
40 | HPPA_FLAGS_REGNUM = 0, /* Various status flags */ |
41 | HPPA_RP_REGNUM = 2, /* return pointer */ | |
42 | HPPA_FP_REGNUM = 3, /* The ABI's frame pointer, when used */ | |
43 | HPPA_SP_REGNUM = 30, /* Stack pointer. */ | |
44 | HPPA_SAR_REGNUM = 32, /* Shift Amount Register */ | |
45 | HPPA_IPSW_REGNUM = 41, /* Interrupt Processor Status Word */ | |
46 | HPPA_PCOQ_HEAD_REGNUM = 33, /* instruction offset queue head */ | |
47 | HPPA_PCSQ_HEAD_REGNUM = 34, /* instruction space queue head */ | |
48 | HPPA_PCOQ_TAIL_REGNUM = 35, /* instruction offset queue tail */ | |
49 | HPPA_PCSQ_TAIL_REGNUM = 36, /* instruction space queue tail */ | |
50 | HPPA_EIEM_REGNUM = 37, /* External Interrupt Enable Mask */ | |
51 | HPPA_IIR_REGNUM = 38, /* Interrupt Instruction Register */ | |
52 | HPPA_ISR_REGNUM = 39, /* Interrupt Space Register */ | |
53 | HPPA_IOR_REGNUM = 40, /* Interrupt Offset Register */ | |
54 | HPPA_SR4_REGNUM = 43, /* space register 4 */ | |
55 | HPPA_RCR_REGNUM = 51, /* Recover Counter (also known as cr0) */ | |
56 | HPPA_PID0_REGNUM = 52, /* Protection ID */ | |
57 | HPPA_PID1_REGNUM = 53, /* Protection ID */ | |
58 | HPPA_PID2_REGNUM = 55, /* Protection ID */ | |
59 | HPPA_PID3_REGNUM = 56, /* Protection ID */ | |
60 | HPPA_CCR_REGNUM = 54, /* Coprocessor Configuration Register */ | |
61 | HPPA_TR0_REGNUM = 57, /* Temporary Registers (cr24 -> cr31) */ | |
62 | HPPA_CR27_REGNUM = 60, /* Base register for thread-local storage, cr27 */ | |
63 | HPPA_FP0_REGNUM = 64, /* First floating-point. */ | |
64 | HPPA_FP4_REGNUM = 72, | |
65 | ||
66 | HPPA_ARG0_REGNUM = 26, /* The first argument of a callee. */ | |
67 | HPPA_ARG1_REGNUM = 25, /* The second argument of a callee. */ | |
68 | HPPA_ARG2_REGNUM = 24, /* The third argument of a callee. */ | |
69 | HPPA_ARG3_REGNUM = 23 /* The fourth argument of a callee. */ | |
70 | }; | |
71 | ||
3ff7cf9e JB |
72 | /* Target-dependent structure in gdbarch. */ |
73 | struct gdbarch_tdep | |
74 | { | |
75 | /* The number of bytes in an address. For now, this field is designed | |
76 | to allow us to differentiate hppa32 from hppa64 targets. */ | |
77 | int bytes_per_address; | |
fdd72f95 RC |
78 | |
79 | /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux | |
80 | system. */ | |
81 | int is_elf; | |
3ff7cf9e JB |
82 | }; |
83 | ||
7c46b9fb RC |
84 | /* |
85 | * Unwind table and descriptor. | |
86 | */ | |
87 | ||
88 | struct unwind_table_entry | |
89 | { | |
90 | CORE_ADDR region_start; | |
91 | CORE_ADDR region_end; | |
92 | ||
93 | unsigned int Cannot_unwind:1; /* 0 */ | |
94 | unsigned int Millicode:1; /* 1 */ | |
95 | unsigned int Millicode_save_sr0:1; /* 2 */ | |
96 | unsigned int Region_description:2; /* 3..4 */ | |
97 | unsigned int reserved1:1; /* 5 */ | |
98 | unsigned int Entry_SR:1; /* 6 */ | |
99 | unsigned int Entry_FR:4; /* number saved *//* 7..10 */ | |
100 | unsigned int Entry_GR:5; /* number saved *//* 11..15 */ | |
101 | unsigned int Args_stored:1; /* 16 */ | |
102 | unsigned int Variable_Frame:1; /* 17 */ | |
103 | unsigned int Separate_Package_Body:1; /* 18 */ | |
104 | unsigned int Frame_Extension_Millicode:1; /* 19 */ | |
105 | unsigned int Stack_Overflow_Check:1; /* 20 */ | |
106 | unsigned int Two_Instruction_SP_Increment:1; /* 21 */ | |
107 | unsigned int Ada_Region:1; /* 22 */ | |
108 | unsigned int cxx_info:1; /* 23 */ | |
109 | unsigned int cxx_try_catch:1; /* 24 */ | |
110 | unsigned int sched_entry_seq:1; /* 25 */ | |
111 | unsigned int reserved2:1; /* 26 */ | |
112 | unsigned int Save_SP:1; /* 27 */ | |
113 | unsigned int Save_RP:1; /* 28 */ | |
114 | unsigned int Save_MRP_in_frame:1; /* 29 */ | |
115 | unsigned int extn_ptr_defined:1; /* 30 */ | |
116 | unsigned int Cleanup_defined:1; /* 31 */ | |
117 | ||
118 | unsigned int MPE_XL_interrupt_marker:1; /* 0 */ | |
119 | unsigned int HP_UX_interrupt_marker:1; /* 1 */ | |
120 | unsigned int Large_frame:1; /* 2 */ | |
121 | unsigned int Pseudo_SP_Set:1; /* 3 */ | |
122 | unsigned int reserved4:1; /* 4 */ | |
123 | unsigned int Total_frame_size:27; /* 5..31 */ | |
124 | ||
125 | /* This is *NOT* part of an actual unwind_descriptor in an object | |
126 | file. It is *ONLY* part of the "internalized" descriptors that | |
127 | we create from those in a file. | |
128 | */ | |
129 | struct | |
130 | { | |
131 | unsigned int stub_type:4; /* 0..3 */ | |
132 | unsigned int padding:28; /* 4..31 */ | |
133 | } | |
134 | stub_unwind; | |
135 | }; | |
136 | ||
137 | /* HP linkers also generate unwinds for various linker-generated stubs. | |
138 | GDB reads in the stubs from the $UNWIND_END$ subspace, then | |
139 | "converts" them into normal unwind entries using some of the reserved | |
140 | fields to store the stub type. */ | |
141 | ||
142 | /* The gaps represent linker stubs used in MPE and space for future | |
143 | expansion. */ | |
144 | enum unwind_stub_types | |
145 | { | |
146 | LONG_BRANCH = 1, | |
147 | PARAMETER_RELOCATION = 2, | |
148 | EXPORT = 10, | |
149 | IMPORT = 11, | |
150 | IMPORT_SHLIB = 12, | |
151 | }; | |
152 | ||
abc485a1 RC |
153 | struct unwind_table_entry *find_unwind_entry (CORE_ADDR); |
154 | ||
7c46b9fb RC |
155 | /* We use the objfile->obj_private pointer for two things: |
156 | * 1. An unwind table; | |
157 | * | |
158 | * 2. A pointer to any associated shared library object. | |
159 | * | |
160 | * #defines are used to help refer to these objects. | |
161 | */ | |
162 | ||
163 | /* Info about the unwind table associated with an object file. | |
164 | * This is hung off of the "objfile->obj_private" pointer, and | |
165 | * is allocated in the objfile's psymbol obstack. This allows | |
166 | * us to have unique unwind info for each executable and shared | |
167 | * library that we are debugging. | |
168 | */ | |
169 | struct hppa_unwind_info | |
170 | { | |
171 | struct unwind_table_entry *table; /* Pointer to unwind info */ | |
172 | struct unwind_table_entry *cache; /* Pointer to last entry we found */ | |
173 | int last; /* Index of last entry */ | |
174 | }; | |
175 | ||
176 | struct hppa_objfile_private | |
177 | { | |
178 | struct hppa_unwind_info *unwind_info; /* a pointer */ | |
179 | struct so_list *so_info; /* a pointer */ | |
180 | CORE_ADDR dp; | |
181 | }; | |
182 | ||
183 | extern const struct objfile_data *hppa_objfile_priv_data; | |
184 | ||
abc485a1 RC |
185 | int hppa_get_field (unsigned word, int from, int to); |
186 | int hppa_extract_5_load (unsigned int); | |
187 | unsigned hppa_extract_5R_store (unsigned int); | |
188 | unsigned hppa_extract_5r_store (unsigned int); | |
189 | int hppa_extract_17 (unsigned int); | |
190 | int hppa_extract_21 (unsigned); | |
191 | int hppa_extract_14 (unsigned); | |
192 | int hppa_low_sign_extend (unsigned int, unsigned int); | |
193 | int hppa_sign_extend (unsigned int, unsigned int); | |
194 | ||
0da28f8a RC |
195 | void |
196 | hppa_frame_prev_register_helper (struct frame_info *next_frame, | |
0d99fdb9 | 197 | struct trad_frame_saved_reg *saved_regs, |
0da28f8a RC |
198 | int regnum, int *optimizedp, |
199 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
200 | int *realnump, void *valuep); | |
201 | ||
3ff7cf9e | 202 | #endif /* HPPA_TDEP_H */ |