1 /* Common target dependent code for GDB on HPPA systems.
2 Copyright 2003, 2004 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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. */
24 struct trad_frame_saved_reg
;
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. */
35 HPPA_R0_REGNUM
= 0, /* Doesn't actually exist, used as base for
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. */
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. */
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. */
71 /* Target-dependent structure in gdbarch. */
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
;
78 /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux
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
*);
86 /* For shared libraries, each call goes through a small piece of
87 trampoline code in the ".plt", or equivalent, section.
88 IN_SOLIB_CALL_TRAMPOLINE evaluates to nonzero if we are currently
89 stopped in one of these. */
90 int (*in_solib_call_trampoline
) (CORE_ADDR pc
, char *name
);
92 /* For targets that support multiple spaces, we may have additional stubs
93 in the return path. These stubs are internal to the ABI, and users are
94 not interested in them. If we detect that we are returning to a stub,
95 adjust the pc to the real caller. This improves the behavior of commands
96 that traverse frames such as "up" and "finish". */
97 void (*unwind_adjust_stub
) (struct frame_info
*next_frame
, CORE_ADDR base
,
98 struct trad_frame_saved_reg
*saved_regs
);
103 * Unwind table and descriptor.
106 struct unwind_table_entry
108 CORE_ADDR region_start
;
109 CORE_ADDR region_end
;
111 unsigned int Cannot_unwind
:1; /* 0 */
112 unsigned int Millicode
:1; /* 1 */
113 unsigned int Millicode_save_sr0
:1; /* 2 */
114 unsigned int Region_description
:2; /* 3..4 */
115 unsigned int reserved1
:1; /* 5 */
116 unsigned int Entry_SR
:1; /* 6 */
117 unsigned int Entry_FR
:4; /* number saved *//* 7..10 */
118 unsigned int Entry_GR
:5; /* number saved *//* 11..15 */
119 unsigned int Args_stored
:1; /* 16 */
120 unsigned int Variable_Frame
:1; /* 17 */
121 unsigned int Separate_Package_Body
:1; /* 18 */
122 unsigned int Frame_Extension_Millicode
:1; /* 19 */
123 unsigned int Stack_Overflow_Check
:1; /* 20 */
124 unsigned int Two_Instruction_SP_Increment
:1; /* 21 */
125 unsigned int Ada_Region
:1; /* 22 */
126 unsigned int cxx_info
:1; /* 23 */
127 unsigned int cxx_try_catch
:1; /* 24 */
128 unsigned int sched_entry_seq
:1; /* 25 */
129 unsigned int reserved2
:1; /* 26 */
130 unsigned int Save_SP
:1; /* 27 */
131 unsigned int Save_RP
:1; /* 28 */
132 unsigned int Save_MRP_in_frame
:1; /* 29 */
133 unsigned int extn_ptr_defined
:1; /* 30 */
134 unsigned int Cleanup_defined
:1; /* 31 */
136 unsigned int MPE_XL_interrupt_marker
:1; /* 0 */
137 unsigned int HP_UX_interrupt_marker
:1; /* 1 */
138 unsigned int Large_frame
:1; /* 2 */
139 unsigned int Pseudo_SP_Set
:1; /* 3 */
140 unsigned int reserved4
:1; /* 4 */
141 unsigned int Total_frame_size
:27; /* 5..31 */
143 /* This is *NOT* part of an actual unwind_descriptor in an object
144 file. It is *ONLY* part of the "internalized" descriptors that
145 we create from those in a file.
149 unsigned int stub_type
:4; /* 0..3 */
150 unsigned int padding
:28; /* 4..31 */
155 /* HP linkers also generate unwinds for various linker-generated stubs.
156 GDB reads in the stubs from the $UNWIND_END$ subspace, then
157 "converts" them into normal unwind entries using some of the reserved
158 fields to store the stub type. */
160 /* The gaps represent linker stubs used in MPE and space for future
162 enum unwind_stub_types
165 PARAMETER_RELOCATION
= 2,
171 struct unwind_table_entry
*find_unwind_entry (CORE_ADDR
);
173 /* We use the objfile->obj_private pointer for two things:
174 * 1. An unwind table;
176 * 2. A pointer to any associated shared library object.
178 * #defines are used to help refer to these objects.
181 /* Info about the unwind table associated with an object file.
182 * This is hung off of the "objfile->obj_private" pointer, and
183 * is allocated in the objfile's psymbol obstack. This allows
184 * us to have unique unwind info for each executable and shared
185 * library that we are debugging.
187 struct hppa_unwind_info
189 struct unwind_table_entry
*table
; /* Pointer to unwind info */
190 struct unwind_table_entry
*cache
; /* Pointer to last entry we found */
191 int last
; /* Index of last entry */
194 struct hppa_objfile_private
196 struct hppa_unwind_info
*unwind_info
; /* a pointer */
197 struct so_list
*so_info
; /* a pointer */
201 extern const struct objfile_data
*hppa_objfile_priv_data
;
203 int hppa_get_field (unsigned word
, int from
, int to
);
204 int hppa_extract_5_load (unsigned int);
205 unsigned hppa_extract_5R_store (unsigned int);
206 unsigned hppa_extract_5r_store (unsigned int);
207 int hppa_extract_17 (unsigned int);
208 int hppa_extract_21 (unsigned);
209 int hppa_extract_14 (unsigned);
210 int hppa_low_sign_extend (unsigned int, unsigned int);
211 int hppa_sign_extend (unsigned int, unsigned int);
212 CORE_ADDR
hppa_symbol_address(const char *sym
);
215 hppa_frame_prev_register_helper (struct frame_info
*next_frame
,
216 struct trad_frame_saved_reg
*saved_regs
,
217 int regnum
, int *optimizedp
,
218 enum lval_type
*lvalp
, CORE_ADDR
*addrp
,
219 int *realnump
, void *valuep
);
221 extern CORE_ADDR
hppa_read_pc (ptid_t ptid
);
222 extern void hppa_write_pc (CORE_ADDR pc
, ptid_t ptid
);
223 extern CORE_ADDR
hppa_unwind_pc (struct gdbarch
*gdbarch
,
224 struct frame_info
*next_frame
);
226 #endif /* HPPA_TDEP_H */