1 /* Target-dependent code for the HP PA-RISC architecture.
3 Copyright (C) 2003-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
23 struct trad_frame_saved_reg;
27 /* Register numbers of various important registers. */
31 HPPA_R0_REGNUM = 0, /* Doesn't actually exist, used as base for
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 */
38 HPPA_RET0_REGNUM = 28,
39 HPPA_RET1_REGNUM = 29,
40 HPPA_SP_REGNUM = 30, /* Stack pointer. */
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_RCR_REGNUM = 51, /* Recover Counter (also known as cr0) */
54 HPPA_PID0_REGNUM = 52, /* Protection ID */
55 HPPA_PID1_REGNUM = 53, /* Protection ID */
56 HPPA_PID2_REGNUM = 55, /* Protection ID */
57 HPPA_PID3_REGNUM = 56, /* Protection ID */
58 HPPA_CCR_REGNUM = 54, /* Coprocessor Configuration Register */
59 HPPA_TR0_REGNUM = 57, /* Temporary Registers (cr24 -> cr31) */
60 HPPA_CR26_REGNUM = 59,
61 HPPA_CR27_REGNUM = 60, /* Base register for thread-local
63 HPPA_FP0_REGNUM = 64, /* First floating-point. */
65 HPPA64_FP4_REGNUM = 68,
66 HPPA_FP31R_REGNUM = 127, /* Last floating-point. */
68 HPPA_ARG0_REGNUM = 26, /* The first argument of a callee. */
69 HPPA_ARG1_REGNUM = 25, /* The second argument of a callee. */
70 HPPA_ARG2_REGNUM = 24, /* The third argument of a callee. */
71 HPPA_ARG3_REGNUM = 23 /* The fourth argument of a callee. */
74 /* Instruction size. */
75 #define HPPA_INSN_SIZE 4
77 /* Target-dependent structure in gdbarch. */
80 /* The number of bytes in an address. For now, this field is designed
81 to allow us to differentiate hppa32 from hppa64 targets. */
82 int bytes_per_address;
84 /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux
88 /* Given a function address, try to find the global pointer for the
89 corresponding shared object. */
90 CORE_ADDR (*find_global_pointer) (struct gdbarch *, struct value *);
92 /* For shared libraries, each call goes through a small piece of
93 trampoline code in the ".plt", or equivalent, section.
94 IN_SOLIB_CALL_TRAMPOLINE evaluates to nonzero if we are currently
95 stopped in one of these. */
96 int (*in_solib_call_trampoline) (struct gdbarch *gdbarch,
97 CORE_ADDR pc, char *name);
99 /* For targets that support multiple spaces, we may have additional stubs
100 in the return path. These stubs are internal to the ABI, and users are
101 not interested in them. If we detect that we are returning to a stub,
102 adjust the pc to the real caller. This improves the behavior of commands
103 that traverse frames such as "up" and "finish". */
104 void (*unwind_adjust_stub) (struct frame_info *this_frame, CORE_ADDR base,
105 struct trad_frame_saved_reg *saved_regs);
107 /* These are solib-dependent methods. They are really HPUX only, but
108 we don't have a HPUX-specific tdep vector at the moment. */
109 CORE_ADDR (*solib_thread_start_addr) (struct so_list *so);
110 CORE_ADDR (*solib_get_got_by_pc) (CORE_ADDR addr);
111 CORE_ADDR (*solib_get_solib_by_pc) (CORE_ADDR addr);
112 CORE_ADDR (*solib_get_text_base) (struct objfile *objfile);
116 * Unwind table and descriptor.
119 struct unwind_table_entry
121 CORE_ADDR region_start;
122 CORE_ADDR region_end;
124 unsigned int Cannot_unwind:1; /* 0 */
125 unsigned int Millicode:1; /* 1 */
126 unsigned int Millicode_save_sr0:1; /* 2 */
127 unsigned int Region_description:2; /* 3..4 */
128 unsigned int reserved:1; /* 5 */
129 unsigned int Entry_SR:1; /* 6 */
130 unsigned int Entry_FR:4; /* number saved *//* 7..10 */
131 unsigned int Entry_GR:5; /* number saved *//* 11..15 */
132 unsigned int Args_stored:1; /* 16 */
133 unsigned int Variable_Frame:1; /* 17 */
134 unsigned int Separate_Package_Body:1; /* 18 */
135 unsigned int Frame_Extension_Millicode:1; /* 19 */
136 unsigned int Stack_Overflow_Check:1; /* 20 */
137 unsigned int Two_Instruction_SP_Increment:1; /* 21 */
138 unsigned int sr4export:1; /* 22 */
139 unsigned int cxx_info:1; /* 23 */
140 unsigned int cxx_try_catch:1; /* 24 */
141 unsigned int sched_entry_seq:1; /* 25 */
142 unsigned int reserved1:1; /* 26 */
143 unsigned int Save_SP:1; /* 27 */
144 unsigned int Save_RP:1; /* 28 */
145 unsigned int Save_MRP_in_frame:1; /* 29 */
146 unsigned int save_r19:1; /* 30 */
147 unsigned int Cleanup_defined:1; /* 31 */
149 unsigned int MPE_XL_interrupt_marker:1; /* 0 */
150 unsigned int HP_UX_interrupt_marker:1; /* 1 */
151 unsigned int Large_frame:1; /* 2 */
152 unsigned int alloca_frame:1; /* 3 */
153 unsigned int reserved2:1; /* 4 */
154 unsigned int Total_frame_size:27; /* 5..31 */
156 /* This is *NOT* part of an actual unwind_descriptor in an object
157 file. It is *ONLY* part of the "internalized" descriptors that
158 we create from those in a file. */
162 unsigned int stub_type:4; /* 0..3 */
163 unsigned int padding:28; /* 4..31 */
168 /* HP linkers also generate unwinds for various linker-generated stubs.
169 GDB reads in the stubs from the $UNWIND_END$ subspace, then
170 "converts" them into normal unwind entries using some of the reserved
171 fields to store the stub type. */
173 /* The gaps represent linker stubs used in MPE and space for future
175 enum unwind_stub_types
178 PARAMETER_RELOCATION = 2,
184 struct unwind_table_entry *find_unwind_entry (CORE_ADDR);
186 /* We use the objfile->obj_private pointer for two things:
187 * 1. An unwind table;
189 * 2. A pointer to any associated shared library object.
191 * #defines are used to help refer to these objects.
194 /* Info about the unwind table associated with an object file.
195 * This is hung off of the "objfile->obj_private" pointer, and
196 * is allocated in the objfile's psymbol obstack. This allows
197 * us to have unique unwind info for each executable and shared
198 * library that we are debugging.
200 struct hppa_unwind_info
202 struct unwind_table_entry *table; /* Pointer to unwind info */
203 struct unwind_table_entry *cache; /* Pointer to last entry we found */
204 int last; /* Index of last entry */
207 struct hppa_objfile_private
209 struct hppa_unwind_info *unwind_info; /* a pointer */
210 struct so_list *so_info; /* a pointer */
213 int dummy_call_sequence_reg;
214 CORE_ADDR dummy_call_sequence_addr;
217 extern const struct objfile_data *hppa_objfile_priv_data;
219 int hppa_get_field (unsigned word, int from, int to);
220 int hppa_extract_5_load (unsigned int);
221 unsigned hppa_extract_5R_store (unsigned int);
222 unsigned hppa_extract_5r_store (unsigned int);
223 int hppa_extract_17 (unsigned int);
224 int hppa_extract_21 (unsigned);
225 int hppa_extract_14 (unsigned);
226 CORE_ADDR hppa_symbol_address(const char *sym);
228 extern struct value *
229 hppa_frame_prev_register_helper (struct frame_info *this_frame,
230 struct trad_frame_saved_reg *saved_regs,
233 extern CORE_ADDR hppa_read_pc (struct regcache *regcache);
234 extern void hppa_write_pc (struct regcache *regcache, CORE_ADDR pc);
235 extern CORE_ADDR hppa_unwind_pc (struct gdbarch *gdbarch,
236 struct frame_info *next_frame);
238 extern struct minimal_symbol *
239 hppa_lookup_stub_minimal_symbol (const char *name,
240 enum unwind_stub_types stub_type);
242 extern struct hppa_objfile_private *hppa_init_objfile_priv_data (struct objfile *objfile);
244 extern int hppa_in_solib_call_trampoline (struct gdbarch *gdbarch,
245 CORE_ADDR pc, char *name);
246 extern CORE_ADDR hppa_skip_trampoline_code (struct frame_info *, CORE_ADDR pc);
248 #endif /* hppa-tdep.h */