Commit | Line | Data |
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c906108c | 1 | /* Parameters for execution on any Hewlett-Packard PA-RISC machine. |
b6ba6518 | 2 | Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
1e698235 | 3 | 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Contributed by the Center for Software Science at the | |
6 | University of Utah (pa-gdb-bugs@cs.utah.edu). | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c | 24 | |
f88e2c52 AC |
25 | #include "regcache.h" |
26 | ||
6c0e89ed | 27 | /* Wonder if this is correct? Should be using push_dummy_call(). */ |
b46e02f6 | 28 | #define DEPRECATED_DUMMY_WRITE_SP(SP) deprecated_write_sp (SP) |
6c0e89ed | 29 | |
61995b3b | 30 | #define GDB_MULTI_ARCH 1 |
e6e68f1f | 31 | |
e92b0cc9 | 32 | /* NOTE: cagney/2002-11-24: This is a guess. */ |
07555a72 | 33 | #define DEPRECATED_USE_GENERIC_DUMMY_FRAMES 0 |
e92b0cc9 | 34 | #define CALL_DUMMY_LOCATION ON_STACK |
ae45cd16 | 35 | #define DEPRECATED_PC_IN_CALL_DUMMY(pc, sp, frame_address) deprecated_pc_in_call_dummy_on_stack (pc, sp, frame_address) |
222e5d1d AC |
36 | /* Hack, get around problem with including "arch-utils.h". */ |
37 | struct frame_info; | |
38 | extern CORE_ADDR init_frame_pc_default (int fromleaf, struct frame_info *prev); | |
a5afb99f | 39 | #define DEPRECATED_INIT_FRAME_PC(l,f) (init_frame_pc_default (l, f)) |
e92b0cc9 | 40 | |
c906108c SS |
41 | /* Forward declarations of some types we use in prototypes */ |
42 | ||
c906108c SS |
43 | struct frame_info; |
44 | struct frame_saved_regs; | |
45 | struct value; | |
46 | struct type; | |
47 | struct inferior_status; | |
c906108c | 48 | |
c906108c SS |
49 | /* Sequence of bytes for breakpoint instruction. */ |
50 | ||
aaab4dba AC |
51 | const unsigned char *hppa_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr); |
52 | #define BREAKPOINT_FROM_PC(PCPTR,LENPTR) hppa_breakpoint_from_pc ((PCPTR), (LENPTR)) | |
c906108c SS |
53 | #define BREAKPOINT32 0x10004 |
54 | ||
d709c020 JB |
55 | extern int hppa_pc_requires_run_before_use (CORE_ADDR pc); |
56 | #define PC_REQUIRES_RUN_BEFORE_USE(pc) hppa_pc_requires_run_before_use (pc) | |
c906108c | 57 | |
c906108c SS |
58 | /* Register numbers of various important registers. |
59 | Note that some of these values are "real" register numbers, | |
60 | and correspond to the general registers of the machine, | |
61 | and some are "phony" register numbers which are too large | |
62 | to be actual register numbers as far as the user is concerned | |
63 | but do serve to get the desired values when passed to read_register. */ | |
64 | ||
65 | #define R0_REGNUM 0 /* Doesn't actually exist, used as base for | |
66 | other r registers. */ | |
67 | #define FLAGS_REGNUM 0 /* Various status flags */ | |
68 | #define RP_REGNUM 2 /* return pointer */ | |
c906108c SS |
69 | #define SAR_REGNUM 32 /* Shift Amount Register */ |
70 | #define IPSW_REGNUM 41 /* Interrupt Processor Status Word */ | |
71 | #define PCOQ_HEAD_REGNUM 33 /* instruction offset queue head */ | |
72 | #define PCSQ_HEAD_REGNUM 34 /* instruction space queue head */ | |
73 | #define PCOQ_TAIL_REGNUM 35 /* instruction offset queue tail */ | |
74 | #define PCSQ_TAIL_REGNUM 36 /* instruction space queue tail */ | |
75 | #define EIEM_REGNUM 37 /* External Interrupt Enable Mask */ | |
76 | #define IIR_REGNUM 38 /* Interrupt Instruction Register */ | |
77 | #define IOR_REGNUM 40 /* Interrupt Offset Register */ | |
78 | #define SR4_REGNUM 43 /* space register 4 */ | |
79 | #define RCR_REGNUM 51 /* Recover Counter (also known as cr0) */ | |
80 | #define CCR_REGNUM 54 /* Coprocessor Configuration Register */ | |
81 | #define TR0_REGNUM 57 /* Temporary Registers (cr24 -> cr31) */ | |
c5aa993b | 82 | #define CR27_REGNUM 60 /* Base register for thread-local storage, cr27 */ |
c906108c SS |
83 | #define FP4_REGNUM 72 |
84 | ||
c5aa993b JM |
85 | #define ARG0_REGNUM 26 /* The first argument of a callee. */ |
86 | #define ARG1_REGNUM 25 /* The second argument of a callee. */ | |
87 | #define ARG2_REGNUM 24 /* The third argument of a callee. */ | |
88 | #define ARG3_REGNUM 23 /* The fourth argument of a callee. */ | |
c906108c | 89 | |
c906108c SS |
90 | /* When fetching register values from an inferior or a core file, |
91 | clean them up using this macro. BUF is a char pointer to | |
92 | the raw value of the register in the registers[] array. */ | |
93 | ||
4ee3352d | 94 | #define DEPRECATED_CLEAN_UP_REGISTER_VALUE(regno, buf) \ |
c906108c SS |
95 | do { \ |
96 | if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \ | |
7be570e7 | 97 | (buf)[sizeof(CORE_ADDR) -1] &= ~0x3; \ |
c906108c SS |
98 | } while (0) |
99 | ||
778ce8cc AC |
100 | /* Define DEPRECATED_DO_REGISTERS_INFO() to do machine-specific |
101 | formatting of register dumps. */ | |
c906108c | 102 | |
778ce8cc | 103 | #define DEPRECATED_DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp) |
a14ed312 | 104 | extern void pa_do_registers_info (int, int); |
c906108c | 105 | |
c906108c SS |
106 | /* PA specific macro to see if the current instruction is nullified. */ |
107 | #ifndef INSTRUCTION_NULLIFIED | |
d709c020 JB |
108 | extern int hppa_instruction_nullified (void); |
109 | #define INSTRUCTION_NULLIFIED hppa_instruction_nullified () | |
c906108c SS |
110 | #endif |
111 | ||
c906108c | 112 | /* elz: Return a large value, which is stored on the stack at addr. |
26e9b323 AC |
113 | This is defined only for the hppa, at this moment. The above macro |
114 | DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS is not called anymore, | |
115 | because it assumes that on exit from a called function which | |
116 | returns a large structure on the stack, the address of the ret | |
117 | structure is still in register 28. Unfortunately this register is | |
118 | usually overwritten by the called function itself, on hppa. This is | |
119 | specified in the calling convention doc. As far as I know, the only | |
120 | way to get the return value is to have the caller tell us where it | |
121 | told the callee to put it, rather than have the callee tell us. */ | |
d5b5ac79 | 122 | struct value *hppa_value_returned_from_stack (struct type *valtype, |
61d8d407 | 123 | CORE_ADDR addr); |
c906108c SS |
124 | #define VALUE_RETURNED_FROM_STACK(valtype,addr) \ |
125 | hppa_value_returned_from_stack (valtype, addr) | |
126 | ||
43bd9a9e AC |
127 | extern void hppa_frame_init_saved_regs (struct frame_info *); |
128 | #define DEPRECATED_FRAME_INIT_SAVED_REGS(FI) \ | |
129 | hppa_frame_init_saved_regs (FI) | |
c5aa993b | 130 | |
c906108c SS |
131 | #define INSTRUCTION_SIZE 4 |
132 | ||
c906108c SS |
133 | /* This sequence of words is the instructions |
134 | ||
c5aa993b JM |
135 | ; Call stack frame has already been built by gdb. Since we could be calling |
136 | ; a varargs function, and we do not have the benefit of a stub to put things in | |
137 | ; the right place, we load the first 4 word of arguments into both the general | |
138 | ; and fp registers. | |
139 | call_dummy | |
140 | ldw -36(sp), arg0 | |
141 | ldw -40(sp), arg1 | |
142 | ldw -44(sp), arg2 | |
143 | ldw -48(sp), arg3 | |
144 | ldo -36(sp), r1 | |
145 | fldws 0(0, r1), fr4 | |
146 | fldds -4(0, r1), fr5 | |
147 | fldws -8(0, r1), fr6 | |
148 | fldds -12(0, r1), fr7 | |
149 | ldil 0, r22 ; FUNC_LDIL_OFFSET must point here | |
150 | ldo 0(r22), r22 ; FUNC_LDO_OFFSET must point here | |
151 | ldsid (0,r22), r4 | |
152 | ldil 0, r1 ; SR4EXPORT_LDIL_OFFSET must point here | |
153 | ldo 0(r1), r1 ; SR4EXPORT_LDO_OFFSET must point here | |
154 | ldsid (0,r1), r20 | |
155 | combt,=,n r4, r20, text_space ; If target is in data space, do a | |
156 | ble 0(sr5, r22) ; "normal" procedure call | |
157 | copy r31, r2 | |
158 | break 4, 8 | |
159 | mtsp r21, sr0 | |
160 | ble,n 0(sr0, r22) | |
161 | text_space ; Otherwise, go through _sr4export, | |
162 | ble (sr4, r1) ; which will return back here. | |
163 | stw r31,-24(r30) | |
164 | break 4, 8 | |
165 | mtsp r21, sr0 | |
166 | ble,n 0(sr0, r22) | |
167 | nop ; To avoid kernel bugs | |
168 | nop ; and keep the dummy 8 byte aligned | |
c906108c SS |
169 | |
170 | The dummy decides if the target is in text space or data space. If | |
171 | it's in data space, there's no problem because the target can | |
172 | return back to the dummy. However, if the target is in text space, | |
173 | the dummy calls the secret, undocumented routine _sr4export, which | |
174 | calls a function in text space and can return to any space. Instead | |
175 | of including fake instructions to represent saved registers, we | |
176 | know that the frame is associated with the call dummy and treat it | |
177 | specially. | |
178 | ||
179 | The trailing NOPs are needed to avoid a bug in HPUX, BSD and OSF1 | |
180 | kernels. If the memory at the location pointed to by the PC is | |
181 | 0xffffffff then a ptrace step call will fail (even if the instruction | |
182 | is nullified). | |
183 | ||
184 | The code to pop a dummy frame single steps three instructions | |
185 | starting with the last mtsp. This includes the nullified "instruction" | |
186 | following the ble (which is uninitialized junk). If the | |
187 | "instruction" following the last BLE is 0xffffffff, then the ptrace | |
188 | will fail and the dummy frame is not correctly popped. | |
189 | ||
190 | By placing a NOP in the delay slot of the BLE instruction we can be | |
191 | sure that we never try to execute a 0xffffffff instruction and | |
192 | avoid the kernel bug. The second NOP is needed to keep the call | |
193 | dummy 8 byte aligned. */ | |
194 | ||
c906108c SS |
195 | #define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\ |
196 | 0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\ | |
197 | 0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A4,\ | |
198 | 0x20200000, 0x34210000, 0x002010b4, 0x82842022,\ | |
199 | 0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\ | |
200 | 0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\ | |
201 | 0x00151820, 0xe6c00002, 0x08000240, 0x08000240} | |
202 | ||
7be570e7 | 203 | #define REG_PARM_STACK_SPACE 16 |
c906108c | 204 | |
c906108c SS |
205 | /* If we've reached a trap instruction within the call dummy, then |
206 | we'll consider that to mean that we've reached the call dummy's | |
207 | end after its successful completion. */ | |
208 | #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \ | |
ae45cd16 | 209 | (DEPRECATED_PC_IN_CALL_DUMMY((pc), (sp), (frame_address)) && \ |
c906108c SS |
210 | (read_memory_integer((pc), 4) == BREAKPOINT32)) |
211 | ||
b1e29e33 AC |
212 | /* Insert the specified number of args and function address into a |
213 | call sequence of the above form stored at DUMMYNAME. | |
214 | ||
215 | On the hppa we need to call the stack dummy through $$dyncall. | |
216 | Therefore our version of DEPRECATED_FIX_CALL_DUMMY takes an extra | |
217 | argument, real_pc, which is the location where gdb should start up | |
218 | the inferior to do the function call. */ | |
c906108c | 219 | |
60383d10 | 220 | /* FIXME: brobecker 2002-12-26. This macro is going to cause us some |
b1e29e33 AC |
221 | problems before we can go to multiarch partial as it has been |
222 | diverted on HPUX to return the value of the PC! */ | |
223 | /* NOTE: cagney/2003-05-03: This has been replaced by push_dummy_code. | |
224 | Hopefully that has all the parameters HP/UX needs. */ | |
225 | #define DEPRECATED_FIX_CALL_DUMMY hppa_fix_call_dummy | |
60383d10 JB |
226 | extern CORE_ADDR hppa_fix_call_dummy (char *, CORE_ADDR, CORE_ADDR, int, |
227 | struct value **, struct type *, int); | |
c906108c | 228 | |
c906108c SS |
229 | #define GDB_TARGET_IS_HPPA |
230 | ||
c906108c SS |
231 | /* |
232 | * Unwind table and descriptor. | |
233 | */ | |
234 | ||
c5aa993b JM |
235 | struct unwind_table_entry |
236 | { | |
7be570e7 JM |
237 | CORE_ADDR region_start; |
238 | CORE_ADDR region_end; | |
c5aa993b JM |
239 | |
240 | unsigned int Cannot_unwind:1; /* 0 */ | |
241 | unsigned int Millicode:1; /* 1 */ | |
242 | unsigned int Millicode_save_sr0:1; /* 2 */ | |
243 | unsigned int Region_description:2; /* 3..4 */ | |
244 | unsigned int reserved1:1; /* 5 */ | |
245 | unsigned int Entry_SR:1; /* 6 */ | |
246 | unsigned int Entry_FR:4; /* number saved *//* 7..10 */ | |
247 | unsigned int Entry_GR:5; /* number saved *//* 11..15 */ | |
248 | unsigned int Args_stored:1; /* 16 */ | |
249 | unsigned int Variable_Frame:1; /* 17 */ | |
250 | unsigned int Separate_Package_Body:1; /* 18 */ | |
251 | unsigned int Frame_Extension_Millicode:1; /* 19 */ | |
252 | unsigned int Stack_Overflow_Check:1; /* 20 */ | |
253 | unsigned int Two_Instruction_SP_Increment:1; /* 21 */ | |
254 | unsigned int Ada_Region:1; /* 22 */ | |
255 | unsigned int cxx_info:1; /* 23 */ | |
256 | unsigned int cxx_try_catch:1; /* 24 */ | |
257 | unsigned int sched_entry_seq:1; /* 25 */ | |
258 | unsigned int reserved2:1; /* 26 */ | |
259 | unsigned int Save_SP:1; /* 27 */ | |
260 | unsigned int Save_RP:1; /* 28 */ | |
261 | unsigned int Save_MRP_in_frame:1; /* 29 */ | |
262 | unsigned int extn_ptr_defined:1; /* 30 */ | |
263 | unsigned int Cleanup_defined:1; /* 31 */ | |
264 | ||
265 | unsigned int MPE_XL_interrupt_marker:1; /* 0 */ | |
266 | unsigned int HP_UX_interrupt_marker:1; /* 1 */ | |
267 | unsigned int Large_frame:1; /* 2 */ | |
268 | unsigned int Pseudo_SP_Set:1; /* 3 */ | |
269 | unsigned int reserved4:1; /* 4 */ | |
270 | unsigned int Total_frame_size:27; /* 5..31 */ | |
271 | ||
272 | /* This is *NOT* part of an actual unwind_descriptor in an object | |
273 | file. It is *ONLY* part of the "internalized" descriptors that | |
274 | we create from those in a file. | |
c906108c | 275 | */ |
c5aa993b JM |
276 | struct |
277 | { | |
278 | unsigned int stub_type:4; /* 0..3 */ | |
279 | unsigned int padding:28; /* 4..31 */ | |
280 | } | |
281 | stub_unwind; | |
282 | }; | |
c906108c SS |
283 | |
284 | /* HP linkers also generate unwinds for various linker-generated stubs. | |
285 | GDB reads in the stubs from the $UNWIND_END$ subspace, then | |
286 | "converts" them into normal unwind entries using some of the reserved | |
287 | fields to store the stub type. */ | |
288 | ||
c906108c SS |
289 | /* The gaps represent linker stubs used in MPE and space for future |
290 | expansion. */ | |
291 | enum unwind_stub_types | |
c5aa993b JM |
292 | { |
293 | LONG_BRANCH = 1, | |
294 | PARAMETER_RELOCATION = 2, | |
295 | EXPORT = 10, | |
296 | IMPORT = 11, | |
297 | IMPORT_SHLIB = 12, | |
298 | }; | |
c906108c SS |
299 | |
300 | /* We use the objfile->obj_private pointer for two things: | |
c5aa993b | 301 | |
c906108c SS |
302 | * 1. An unwind table; |
303 | * | |
304 | * 2. A pointer to any associated shared library object. | |
305 | * | |
306 | * #defines are used to help refer to these objects. | |
307 | */ | |
c5aa993b | 308 | |
c906108c | 309 | /* Info about the unwind table associated with an object file. |
c5aa993b | 310 | |
c906108c SS |
311 | * This is hung off of the "objfile->obj_private" pointer, and |
312 | * is allocated in the objfile's psymbol obstack. This allows | |
313 | * us to have unique unwind info for each executable and shared | |
314 | * library that we are debugging. | |
315 | */ | |
c5aa993b JM |
316 | struct obj_unwind_info |
317 | { | |
318 | struct unwind_table_entry *table; /* Pointer to unwind info */ | |
319 | struct unwind_table_entry *cache; /* Pointer to last entry we found */ | |
320 | int last; /* Index of last entry */ | |
321 | }; | |
322 | ||
323 | typedef struct obj_private_struct | |
324 | { | |
325 | struct obj_unwind_info *unwind_info; /* a pointer */ | |
326 | struct so_list *so_info; /* a pointer */ | |
53a5351d | 327 | CORE_ADDR dp; |
c5aa993b JM |
328 | } |
329 | obj_private_data_t; | |
c906108c | 330 | |
c906108c SS |
331 | /* For a number of horrible reasons we may have to adjust the location |
332 | of variables on the stack. Ugh. */ | |
333 | #define HPREAD_ADJUST_STACK_ADDRESS(ADDR) hpread_adjust_stack_address(ADDR) | |
a14ed312 | 334 | extern int hpread_adjust_stack_address (CORE_ADDR); |
c906108c | 335 | |
c2c6d25f JM |
336 | /* Here's how to step off a permanent breakpoint. */ |
337 | #define SKIP_PERMANENT_BREAKPOINT (hppa_skip_permanent_breakpoint) | |
338 | extern void hppa_skip_permanent_breakpoint (void); | |
2df3850c JM |
339 | |
340 | /* On HP-UX, certain system routines (millicode) have names beginning | |
341 | with $ or $$, e.g. $$dyncall, which handles inter-space procedure | |
342 | calls on PA-RISC. Tell the expression parser to check for those | |
343 | when parsing tokens that begin with "$". */ | |
344 | #define SYMBOLS_CAN_START_WITH_DOLLAR (1) |