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* libbfd.c (bfd_read): Set bfd_error as appropriate for a short
[deliverable/binutils-gdb.git] / bfd / elf32-hppa.c
1 /* BFD back-end for HP PA-RISC ELF files.
2 Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
3
4 Written by
5
6 Center for Software Science
7 Department of Computer Science
8 University of Utah
9
10 This file is part of BFD, the Binary File Descriptor library.
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
25
26 #include "bfd.h"
27 #include "sysdep.h"
28 #include "libbfd.h"
29 #include "obstack.h"
30 #include "bfdlink.h"
31 #include "libelf.h"
32
33 /* Note there isn't much error handling code in here yet. Unexpected
34 conditions are handled by just calling abort. FIXME damnit! */
35
36 /* ELF32/HPPA relocation support
37
38 This file contains ELF32/HPPA relocation support as specified
39 in the Stratus FTX/Golf Object File Format (SED-1762) dated
40 November 19, 1992. */
41
42 #include "elf32-hppa.h"
43 #include "aout/aout64.h"
44 #include "hppa_stubs.h"
45
46 /* The basic stub types supported. If/when shared libraries are
47 implemented some form of IMPORT and EXPORT stubs will be needed. */
48 typedef enum
49 {
50 HPPA_STUB_ILLEGAL,
51 HPPA_STUB_ARG_RELOC,
52 HPPA_STUB_LONG_CALL,
53 } hppa_stub_type;
54
55 /* This is a list of all the stubs for a particular BFD. */
56
57 typedef struct elf32_hppa_stub_name_list_struct
58 {
59 /* The symbol associated with this stub. */
60 asymbol *sym;
61 /* Pointer to chain of all stub chains. */
62 struct elf32_hppa_stub_description_struct *stub_desc;
63 /* Pointer to the stub contents (eg instructions). */
64 int *stub_secp;
65 /* Size of this stub? (in what units? FIXME). */
66 unsigned size;
67 /* Pointer to the next stub entry in the chain. */
68 struct elf32_hppa_stub_name_list_struct *next;
69 } elf32_hppa_stub_name_list;
70
71 /* This is a linked list in which each entry describes all the
72 linker stubs for a particular bfd. */
73
74 typedef struct elf32_hppa_stub_description_struct
75 {
76 /* The next group of stubs. */
77 struct elf32_hppa_stub_description_struct *next;
78 /* Used to identify this group of stubs as belonging
79 to a particular bfd. */
80 bfd *this_bfd;
81 /* FIXME: The stub section for this group of stubs? Is
82 this redundant with stub_listP->sym->section? */
83 asection *stub_sec;
84 /* FIXME: what the hell is this? */
85 unsigned relocs_allocated_cnt;
86 /* The current real size of the stubs (in bytes?). */
87 unsigned real_size;
88 /* How much space we have allocated for stubs (in bytes?). */
89 unsigned allocated_size;
90 /* Pointer to the first available space for new stubs. */
91 int *stub_secp;
92 /* Pointer to the beginning of the stubs. FIXME: Why an int *
93 above and a char * here? */
94 char *stub_contents;
95 /* The list of stubs for this bfd. */
96 elf32_hppa_stub_name_list *stub_listP;
97 /* I guess we just carry this around for fun. */
98 struct bfd_link_info *link_info;
99 } elf32_hppa_stub_description;
100
101 /* FIXME. */
102 #define ARGUMENTS 0
103 #define RETURN_VALUE 1
104
105 /* The various argument relocations that may be performed.
106 Note GRX,GRY really means ARGX,ARGY. */
107 typedef enum
108 {
109 /* No relocation. */
110 NO_ARG_RELOC,
111 /* Relocate 32 bits from general to FP register. */
112 R_TO_FR,
113 /* Relocate 64 bits from arg0,arg1 to FParg1. */
114 R01_TO_FR,
115 /* Relocate 64 bits from arg2,arg3 to FParg3. */
116 R23_TO_FR,
117 /* Relocate 32 bits from FP to general register. */
118 FR_TO_R,
119 /* Relocate 64 bits from FParg1 to arg0,arg1. */
120 FR_TO_R01,
121 /* Relocate 64 bits from FParg3 to arg2,arg3. */
122 FR_TO_R23,
123 /* Death. */
124 ARG_RELOC_ERR,
125 } arg_reloc_type;
126
127 /* Where (what register type) is an argument comming from? */
128 typedef enum
129 {
130 /* Not in a register. */
131 AR_NO,
132 /* In a general argument register. */
133 AR_GR,
134 /* In right half of a FP argument register. */
135 AR_FR,
136 /* In upper (left) half of a FP argument register. */
137 AR_FU,
138 /* In general argument register pair 0 (arg0, arg1). */
139 AR_DBL01,
140 /* In general argument register pair 1 (arg2, arg3). */
141 AR_DBL23,
142 } arg_location;
143
144 /* What is being relocated (eg which argument or the return value). */
145 typedef enum
146 {
147 ARG0, ARG1, ARG2, ARG3, RETVAL,
148 } arg_reloc_location;
149
150 /* Horizontal represents callee's argument location information, vertical
151 represents caller's argument location information. Value at a particular
152 X, Y location represents what (if any) argument relocation needs to
153 be performed to make caller and callee agree. */
154 static CONST arg_reloc_type mismatches[6][6] =
155 {
156 {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC,
157 NO_ARG_RELOC, NO_ARG_RELOC},
158 {NO_ARG_RELOC, NO_ARG_RELOC, R_TO_FR, ARG_RELOC_ERR,
159 R01_TO_FR, ARG_RELOC_ERR},
160 {NO_ARG_RELOC, FR_TO_R, NO_ARG_RELOC, ARG_RELOC_ERR,
161 ARG_RELOC_ERR, ARG_RELOC_ERR},
162 {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR,
163 ARG_RELOC_ERR, ARG_RELOC_ERR},
164 {NO_ARG_RELOC, FR_TO_R01, NO_ARG_RELOC, ARG_RELOC_ERR,
165 NO_ARG_RELOC, ARG_RELOC_ERR},
166 {NO_ARG_RELOC, FR_TO_R23, NO_ARG_RELOC, ARG_RELOC_ERR,
167 ARG_RELOC_ERR, NO_ARG_RELOC},
168 };
169
170 /* Likewise for the return value. */
171 static CONST arg_reloc_type retval_mismatches[6][6] =
172 {
173 {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC,
174 NO_ARG_RELOC, NO_ARG_RELOC},
175 {NO_ARG_RELOC, NO_ARG_RELOC, FR_TO_R, ARG_RELOC_ERR,
176 FR_TO_R01, ARG_RELOC_ERR},
177 {NO_ARG_RELOC, R_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
178 ARG_RELOC_ERR, ARG_RELOC_ERR},
179 {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR,
180 ARG_RELOC_ERR, ARG_RELOC_ERR},
181 {NO_ARG_RELOC, R01_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
182 NO_ARG_RELOC, ARG_RELOC_ERR},
183 {NO_ARG_RELOC, R23_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
184 ARG_RELOC_ERR, NO_ARG_RELOC},
185 };
186
187 /* Used for index mapping in symbol-extension sections. */
188 struct elf32_hppa_symextn_map_struct
189 {
190 int old_index;
191 bfd *bfd;
192 asymbol *sym;
193 int new_index;
194 };
195
196 static bfd_reloc_status_type hppa_elf_reloc
197 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
198
199 static unsigned long hppa_elf_relocate_insn
200 PARAMS ((bfd *, asection *, unsigned long, unsigned long, long,
201 long, unsigned long, unsigned long, unsigned long));
202
203 static void hppa_elf_relocate_unwind_table
204 PARAMS ((bfd *, PTR, unsigned long, long, long,
205 unsigned long, unsigned long));
206
207 static long get_symbol_value PARAMS ((asymbol *));
208
209 static bfd_reloc_status_type hppa_elf_reloc
210 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd*, char **));
211
212 static CONST reloc_howto_type * elf_hppa_reloc_type_lookup
213 PARAMS ((bfd_arch_info_type *, bfd_reloc_code_real_type));
214
215 static symext_entryS elf32_hppa_get_sym_extn PARAMS ((bfd *, asymbol *, int));
216
217 static elf32_hppa_stub_description * find_stubs PARAMS ((bfd *, asection *));
218
219 static elf32_hppa_stub_description * new_stub
220 PARAMS ((bfd *, asection *, struct bfd_link_info *));
221
222 static arg_reloc_type type_of_mismatch PARAMS ((int, int, int));
223
224 static elf32_hppa_stub_name_list * find_stub_by_name
225 PARAMS ((bfd *, asection *, char *));
226
227 static elf32_hppa_stub_name_list * add_stub_by_name
228 PARAMS ((bfd *, asection *, asymbol *, struct bfd_link_info *));
229
230 static void hppa_elf_stub_finish PARAMS ((bfd *));
231
232 static void hppa_elf_stub_reloc
233 PARAMS ((elf32_hppa_stub_description *, bfd *, asymbol **, int,
234 elf32_hppa_reloc_type));
235
236 static int hppa_elf_arg_reloc_needed_p
237 PARAMS ((bfd *, arelent *, arg_reloc_type [5], symext_entryS));
238
239 static asymbol * hppa_elf_build_linker_stub
240 PARAMS ((bfd *, bfd *, struct bfd_link_info *, arelent *,
241 arg_reloc_type [5], int, unsigned *, hppa_stub_type));
242
243 static void hppa_elf_create_stub_sec
244 PARAMS ((bfd *, bfd *, asection **, struct bfd_link_info *));
245
246 static int hppa_elf_long_branch_needed_p
247 PARAMS ((bfd *, asection *, arelent *, asymbol *, unsigned));
248
249 static boolean hppa_elf_set_section_contents
250 PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
251
252 static void elf_info_to_howto
253 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
254
255 static void elf32_hppa_backend_symbol_processing PARAMS ((bfd *, asymbol *));
256
257 static boolean elf32_hppa_backend_section_processing
258 PARAMS ((bfd *, Elf32_Internal_Shdr *));
259
260 static boolean elf32_hppa_backend_symbol_table_processing
261 PARAMS ((bfd *, elf_symbol_type *, int));
262
263 static boolean elf32_hppa_backend_section_from_shdr
264 PARAMS ((bfd *, Elf32_Internal_Shdr *, char *));
265
266 static boolean elf32_hppa_backend_fake_sections
267 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
268
269 static boolean elf32_hppa_backend_section_from_bfd_section
270 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *));
271
272 static boolean som_bfd_is_local_label PARAMS ((bfd *, asymbol *));
273
274 /* ELF/PA relocation howto entries. */
275
276 static reloc_howto_type elf_hppa_howto_table[ELF_HOWTO_TABLE_SIZE] =
277 {
278 {R_HPPA_NONE, 0, 3, 19, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_NONE"},
279 {R_HPPA_32, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_32"},
280 {R_HPPA_11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_11"},
281 {R_HPPA_14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_14"},
282 {R_HPPA_17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_17"},
283 {R_HPPA_L21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_L21"},
284 {R_HPPA_R11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_R11"},
285 {R_HPPA_R14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_R14"},
286 {R_HPPA_R17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_R17"},
287 {R_HPPA_LS21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_LS21"},
288 {R_HPPA_RS11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RS11"},
289 {R_HPPA_RS14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RS14"},
290 {R_HPPA_RS17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RS17"},
291 {R_HPPA_LD21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_LD21"},
292 {R_HPPA_RD11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RD11"},
293 {R_HPPA_RD14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RD14"},
294 {R_HPPA_RD17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RD17"},
295 {R_HPPA_LR21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_LR21"},
296 {R_HPPA_RR14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RR14"},
297 {R_HPPA_RR17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_RR17"},
298 {R_HPPA_GOTOFF_11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_11"},
299 {R_HPPA_GOTOFF_14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_14"},
300 {R_HPPA_GOTOFF_L21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_L21"},
301 {R_HPPA_GOTOFF_R11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_R11"},
302 {R_HPPA_GOTOFF_R14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_R14"},
303 {R_HPPA_GOTOFF_LS21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_LS21"},
304 {R_HPPA_GOTOFF_RS11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_RS11"},
305 {R_HPPA_GOTOFF_RS14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_RS14"},
306 {R_HPPA_GOTOFF_LD21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_LD21"},
307 {R_HPPA_GOTOFF_RD11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_RD11"},
308 {R_HPPA_GOTOFF_RD14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_RD14"},
309 {R_HPPA_GOTOFF_LR21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_LR21"},
310 {R_HPPA_GOTOFF_RR14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_GOTOFF_RR14"},
311 {R_HPPA_ABS_CALL_11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_11"},
312 {R_HPPA_ABS_CALL_14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_14"},
313 {R_HPPA_ABS_CALL_17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_17"},
314 {R_HPPA_ABS_CALL_L21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_L21"},
315 {R_HPPA_ABS_CALL_R11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_R11"},
316 {R_HPPA_ABS_CALL_R14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_R14"},
317 {R_HPPA_ABS_CALL_R17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_R17"},
318 {R_HPPA_ABS_CALL_LS21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_LS21"},
319 {R_HPPA_ABS_CALL_RS11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RS11"},
320 {R_HPPA_ABS_CALL_RS14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RS14"},
321 {R_HPPA_ABS_CALL_RS17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RS17"},
322 {R_HPPA_ABS_CALL_LD21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_LD21"},
323 {R_HPPA_ABS_CALL_RD11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RD11"},
324 {R_HPPA_ABS_CALL_RD14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RD14"},
325 {R_HPPA_ABS_CALL_RD17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RD17"},
326 {R_HPPA_ABS_CALL_LR21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_LR21"},
327 {R_HPPA_ABS_CALL_RR14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RR14"},
328 {R_HPPA_ABS_CALL_RR17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ABS_CALL_RR17"},
329 {R_HPPA_PCREL_CALL_11, 0, 3, 11, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_11"},
330 {R_HPPA_PCREL_CALL_14, 0, 3, 14, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_14"},
331 {R_HPPA_PCREL_CALL_17, 0, 3, 17, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_17"},
332 {R_HPPA_PCREL_CALL_12, 0, 3, 12, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_12"},
333 {R_HPPA_PCREL_CALL_L21, 0, 3, 21, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_L21"},
334 {R_HPPA_PCREL_CALL_R11, 0, 3, 11, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_R11"},
335 {R_HPPA_PCREL_CALL_R14, 0, 3, 14, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_R14"},
336 {R_HPPA_PCREL_CALL_R17, 0, 3, 17, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_R17"},
337 {R_HPPA_PCREL_CALL_LS21, 0, 3, 21, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_LS21"},
338 {R_HPPA_PCREL_CALL_RS11, 0, 3, 11, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RS11"},
339 {R_HPPA_PCREL_CALL_RS14, 0, 3, 14, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RS14"},
340 {R_HPPA_PCREL_CALL_RS17, 0, 3, 17, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RS17"},
341 {R_HPPA_PCREL_CALL_LD21, 0, 3, 21, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_LD21"},
342 {R_HPPA_PCREL_CALL_RD11, 0, 3, 11, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RD11"},
343 {R_HPPA_PCREL_CALL_RD14, 0, 3, 14, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RD14"},
344 {R_HPPA_PCREL_CALL_RD17, 0, 3, 17, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RD17"},
345 {R_HPPA_PCREL_CALL_LR21, 0, 3, 21, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_LR21"},
346 {R_HPPA_PCREL_CALL_RR14, 0, 3, 14, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RR14"},
347 {R_HPPA_PCREL_CALL_RR17, 0, 3, 17, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PCREL_CALL_RR17"},
348 {R_HPPA_PLABEL_32, 0, 3, 32, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PLABEL_32"},
349 {R_HPPA_PLABEL_11, 0, 3, 11, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PLABEL_11"},
350 {R_HPPA_PLABEL_14, 0, 3, 14, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PLABEL_14"},
351 {R_HPPA_PLABEL_L21, 0, 3, 21, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PLABEL_L21"},
352 {R_HPPA_PLABEL_R11, 0, 3, 11, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PLABEL_R11"},
353 {R_HPPA_PLABEL_R14, 0, 3, 14, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_PLABEL_R14"},
354 {R_HPPA_DLT_32, 0, 3, 32, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_DLT_32"},
355 {R_HPPA_DLT_11, 0, 3, 11, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_DLT_11"},
356 {R_HPPA_DLT_14, 0, 3, 14, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_DLT_14"},
357 {R_HPPA_DLT_L21, 0, 3, 21, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_DLT_L21"},
358 {R_HPPA_DLT_R11, 0, 3, 11, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_DLT_R11"},
359 {R_HPPA_DLT_R14, 0, 3, 14, false, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_DLT_R14"},
360 {R_HPPA_UNWIND_ENTRY, 0, 3, 32, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_UNWIND_ENTRY"},
361 {R_HPPA_UNWIND_ENTRIES, 0, 3, 32, true, 0, complain_overflow_signed, hppa_elf_reloc, "R_HPPA_UNWIND_ENTRIES"},
362 {R_HPPA_PUSH_CONST, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_PUSH_CONST"},
363 {R_HPPA_PUSH_PC, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_PUSH_PC"},
364 {R_HPPA_PUSH_SYM, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_PUSH_SYM"},
365 {R_HPPA_PUSH_GOTOFF, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_PUSH_GOTOFF"},
366 {R_HPPA_PUSH_ABS_CALL, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_PUSH_ABS_CALL"},
367 {R_HPPA_PUSH_PCREL_CALL, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_PUSH_PCREL_CALL"},
368 {R_HPPA_PUSH_PLABEL, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_PUSH_PLABEL"},
369 {R_HPPA_MAX, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_MAX"},
370 {R_HPPA_MIN, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_MIN"},
371 {R_HPPA_ADD, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ADD"},
372 {R_HPPA_SUB, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_SUB"},
373 {R_HPPA_MULT, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_MULT"},
374 {R_HPPA_DIV, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_DIV"},
375 {R_HPPA_MOD, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_MOD"},
376 {R_HPPA_AND, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_AND"},
377 {R_HPPA_OR, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_OR"},
378 {R_HPPA_XOR, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_XOR"},
379 {R_HPPA_NOT, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_NOT"},
380 {R_HPPA_LSHIFT, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_LSHIFT"},
381 {R_HPPA_ARITH_RSHIFT, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_ARITH_RSHIFT"},
382 {R_HPPA_LOGIC_RSHIFT, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_LOGIC_RSHIFT"},
383 {R_HPPA_EXPR_F, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_L"},
384 {R_HPPA_EXPR_L, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_L"},
385 {R_HPPA_EXPR_R, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_R"},
386 {R_HPPA_EXPR_LS, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_LS"},
387 {R_HPPA_EXPR_RS, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_RS"},
388 {R_HPPA_EXPR_LD, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_LD"},
389 {R_HPPA_EXPR_RD, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_RD"},
390 {R_HPPA_EXPR_LR, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_LR"},
391 {R_HPPA_EXPR_RR, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_RR"},
392 {R_HPPA_EXPR_32, 0, 3, 32, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_32"},
393 {R_HPPA_EXPR_21, 0, 3, 21, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_21"},
394 {R_HPPA_EXPR_11, 0, 3, 11, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_11"},
395 {R_HPPA_EXPR_14, 0, 3, 14, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_14"},
396 {R_HPPA_EXPR_17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_17"},
397 {R_HPPA_EXPR_12, 0, 3, 12, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_EXPR_12"},
398 {R_HPPA_STUB_CALL_17, 0, 3, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_STUB_CALL_17"},
399 {R_HPPA_UNIMPLEMENTED, 0, 0, 0, false, 0, complain_overflow_dont, NULL, "R_HPPA_UNIMPLEMENTED"},
400 };
401
402 static symext_chainS *symext_rootP;
403 static symext_chainS *symext_lastP;
404 static boolean symext_chain_built;
405 static long global_value;
406 static long GOT_value;
407 static asymbol *global_symbol;
408 static int global_sym_defined;
409 static symext_entryS *symextn_contents;
410 static unsigned int symextn_contents_real_size;
411 static elf32_hppa_stub_description *elf_hppa_stub_rootP;
412 static boolean stubs_finished = false;
413 static struct elf32_hppa_symextn_map_struct *elf32_hppa_symextn_map;
414 static int elf32_hppa_symextn_map_size;
415
416 static char *linker_stubs = NULL;
417 static int linker_stubs_size = 0;
418 static int linker_stubs_max_size = 0;
419 #define STUB_ALLOC_INCR 100
420 #define STUB_SYM_BUFFER_INC 5
421
422 /* Relocate the given INSN given the various input parameters.
423
424 FIXME: endianness and sizeof (long) issues abound here. */
425
426 static unsigned long
427 hppa_elf_relocate_insn (abfd, input_sect, insn, address, sym_value,
428 r_addend, r_format, r_field, pcrel)
429 bfd *abfd;
430 asection *input_sect;
431 unsigned long insn;
432 unsigned long address;
433 long sym_value;
434 long r_addend;
435 unsigned long r_format;
436 unsigned long r_field;
437 unsigned long pcrel;
438 {
439 unsigned char opcode = get_opcode (insn);
440 long constant_value;
441 unsigned arg_reloc;
442
443 switch (opcode)
444 {
445 case LDO:
446 case LDB:
447 case LDH:
448 case LDW:
449 case LDWM:
450 case STB:
451 case STH:
452 case STW:
453 case STWM:
454 case COMICLR:
455 case SUBI:
456 case ADDIT:
457 case ADDI:
458 case LDIL:
459 case ADDIL:
460 constant_value = HPPA_R_CONSTANT (r_addend);
461
462 if (pcrel)
463 sym_value -= address;
464
465 sym_value = hppa_field_adjust (sym_value, constant_value, r_field);
466 return hppa_rebuild_insn (abfd, insn, sym_value, r_format);
467
468 case BL:
469 case BE:
470 case BLE:
471 arg_reloc = HPPA_R_ARG_RELOC (r_addend);
472
473 /* XXX computing constant_value is not needed??? */
474 constant_value = assemble_17 ((insn & 0x001f0000) >> 16,
475 (insn & 0x00001ffc) >> 2,
476 insn & 1);
477
478 constant_value = (constant_value << 15) >> 15;
479 if (pcrel)
480 {
481 sym_value -=
482 address + input_sect->output_offset
483 + input_sect->output_section->vma;
484 sym_value = hppa_field_adjust (sym_value, -8, r_field);
485 }
486 else
487 sym_value = hppa_field_adjust (sym_value, constant_value, r_field);
488
489 return hppa_rebuild_insn (abfd, insn, sym_value >> 2, r_format);
490
491 default:
492 if (opcode == 0)
493 {
494 constant_value = HPPA_R_CONSTANT (r_addend);
495
496 if (pcrel)
497 sym_value -= address;
498
499 return hppa_field_adjust (sym_value, constant_value, r_field);
500 }
501 else
502 abort ();
503 }
504 }
505
506 /* Relocate a single unwind entry, or an entire table of them. */
507
508 static void
509 hppa_elf_relocate_unwind_table (abfd, data, address, sym_value,
510 r_addend, r_type, r_field)
511 bfd *abfd;
512 PTR data;
513 unsigned long address;
514 long sym_value;
515 long r_addend;
516 unsigned long r_type;
517 unsigned long r_field;
518 {
519 bfd_byte *hit_data = address + (bfd_byte *) data;
520 long start_offset;
521 long end_offset;
522 long relocated_value;
523 int i;
524
525 switch (r_type)
526 {
527 case R_HPPA_UNWIND_ENTRY:
528 /* Need to relocate the first two 32bit fields in the unwind. They
529 correspond to a function's start and end address. */
530 start_offset = bfd_get_32 (abfd, hit_data);
531 relocated_value = hppa_field_adjust (sym_value, start_offset, r_field);
532 bfd_put_32 (abfd, relocated_value, hit_data);
533
534 hit_data += sizeof (unsigned long);
535 end_offset = bfd_get_32 (abfd, hit_data);
536 relocated_value = hppa_field_adjust (sym_value, end_offset, r_field);
537 bfd_put_32 (abfd, relocated_value, hit_data);
538 break;
539
540 case R_HPPA_UNWIND_ENTRIES:
541 /* Relocate a mass of unwind entires. The count is passed in r_addend
542 (who's braindamaged idea was this anyway? */
543 for (i = 0; i < r_addend; i++, hit_data += 3 * sizeof (unsigned long))
544 {
545 unsigned int adjustment;
546 /* Adjust the first 32bit field in the unwind entry. It's
547 the starting offset of a function. */
548 start_offset = bfd_get_32 (abfd, hit_data);
549 bfd_put_32 (abfd, sym_value, hit_data);
550 adjustment = sym_value - start_offset;
551
552 /* Now adjust the second 32bit field, it's the ending offset
553 of a function. */
554 hit_data += sizeof (unsigned long);
555 end_offset = adjustment + bfd_get_32 (abfd, hit_data);
556 bfd_put_32 (abfd, end_offset, hit_data);
557
558 /* Prepare for the next iteration. */
559 start_offset = bfd_get_32 (abfd,
560 hit_data + 3 * sizeof (unsigned long));
561 sym_value = start_offset + adjustment;
562 }
563 break;
564
565 default:
566 abort ();
567 }
568 }
569
570 /* Return the relocated value of the given symbol. */
571
572 static long
573 get_symbol_value (symbol)
574 asymbol *symbol;
575 {
576 if (symbol == NULL
577 || symbol->section == &bfd_com_section)
578 return 0;
579 else
580 return symbol->value + symbol->section->output_section->vma
581 + symbol->section->output_offset;
582 }
583
584 /* Return one (or more) BFD relocations which implement the base
585 relocation with modifications based on format and field. */
586
587 elf32_hppa_reloc_type **
588 hppa_elf_gen_reloc_type (abfd, base_type, format, field)
589 bfd *abfd;
590 elf32_hppa_reloc_type base_type;
591 int format;
592 int field;
593 {
594 elf32_hppa_reloc_type *finaltype;
595 elf32_hppa_reloc_type **final_types;
596
597 /* Allocate slots for the BFD relocation. */
598 final_types = (elf32_hppa_reloc_type **)
599 bfd_alloc_by_size_t (abfd, sizeof (elf32_hppa_reloc_type *) * 2);
600 BFD_ASSERT (final_types != 0); /* FIXME */
601
602 /* Allocate space for the relocation itself. */
603 finaltype = (elf32_hppa_reloc_type *)
604 bfd_alloc_by_size_t (abfd, sizeof (elf32_hppa_reloc_type));
605 BFD_ASSERT (finaltype != 0); /* FIXME */
606
607 /* Some reasonable defaults. */
608 final_types[0] = finaltype;
609 final_types[1] = NULL;
610
611 #define final_type finaltype[0]
612
613 final_type = base_type;
614
615 /* Just a tangle of nested switch statements to deal with the braindamage
616 that a different field selector means a completely different relocation
617 for PA ELF. */
618 switch (base_type)
619 {
620 case R_HPPA:
621 switch (format)
622 {
623 case 11:
624 switch (field)
625 {
626 case e_fsel:
627 final_type = R_HPPA_11;
628 break;
629 case e_rsel:
630 final_type = R_HPPA_R11;
631 break;
632 case e_rssel:
633 final_type = R_HPPA_RS11;
634 break;
635 case e_rdsel:
636 final_type = R_HPPA_RD11;
637 break;
638 case e_psel:
639 final_type = R_HPPA_PLABEL_11;
640 break;
641 case e_rpsel:
642 final_type = R_HPPA_PLABEL_R11;
643 break;
644 case e_tsel:
645 final_type = R_HPPA_DLT_11;
646 break;
647 case e_rtsel:
648 final_type = R_HPPA_DLT_R11;
649 break;
650 default:
651 abort ();
652 break;
653 }
654 break;
655
656 case 14:
657 switch (field)
658 {
659 case e_rsel:
660 final_type = R_HPPA_R14;
661 break;
662 case e_rssel:
663 final_type = R_HPPA_RS14;
664 break;
665 case e_rdsel:
666 final_type = R_HPPA_RD14;
667 break;
668 case e_rrsel:
669 final_type = R_HPPA_RR14;
670 break;
671 case e_psel:
672 final_type = R_HPPA_PLABEL_14;
673 break;
674 case e_rpsel:
675 final_type = R_HPPA_PLABEL_R14;
676 break;
677 case e_tsel:
678 final_type = R_HPPA_DLT_14;
679 break;
680 case e_rtsel:
681 final_type = R_HPPA_DLT_R14;
682 break;
683 default:
684 abort ();
685 break;
686 }
687 break;
688
689 case 17:
690 switch (field)
691 {
692 case e_fsel:
693 final_type = R_HPPA_17;
694 break;
695 case e_rsel:
696 final_type = R_HPPA_R17;
697 break;
698 case e_rssel:
699 final_type = R_HPPA_RS17;
700 break;
701 case e_rdsel:
702 final_type = R_HPPA_RD17;
703 break;
704 case e_rrsel:
705 final_type = R_HPPA_RR17;
706 break;
707 default:
708 abort ();
709 break;
710 }
711 break;
712
713 case 21:
714 switch (field)
715 {
716 case e_lsel:
717 final_type = R_HPPA_L21;
718 break;
719 case e_lssel:
720 final_type = R_HPPA_LS21;
721 break;
722 case e_ldsel:
723 final_type = R_HPPA_LD21;
724 break;
725 case e_lrsel:
726 final_type = R_HPPA_LR21;
727 break;
728 case e_lpsel:
729 final_type = R_HPPA_PLABEL_L21;
730 break;
731 case e_ltsel:
732 final_type = R_HPPA_PLABEL_L21;
733 break;
734 default:
735 abort ();
736 break;
737 }
738 break;
739
740 case 32:
741 switch (field)
742 {
743 case e_fsel:
744 final_type = R_HPPA_32;
745 break;
746 case e_psel:
747 final_type = R_HPPA_PLABEL_32;
748 break;
749 case e_tsel:
750 final_type = R_HPPA_DLT_32;
751 break;
752 default:
753 abort ();
754 break;
755 }
756 break;
757
758 default:
759 abort ();
760 break;
761 }
762 break;
763
764
765 case R_HPPA_GOTOFF:
766 switch (format)
767 {
768 case 11:
769 switch (field)
770 {
771 case e_rsel:
772 final_type = R_HPPA_GOTOFF_R11;
773 break;
774 case e_rssel:
775 final_type = R_HPPA_GOTOFF_RS11;
776 break;
777 case e_rdsel:
778 final_type = R_HPPA_GOTOFF_RD11;
779 break;
780 case e_fsel:
781 final_type = R_HPPA_GOTOFF_11;
782 break;
783 default:
784 abort ();
785 break;
786 }
787 break;
788
789 case 14:
790 switch (field)
791 {
792 case e_rsel:
793 final_type = R_HPPA_GOTOFF_R14;
794 break;
795 case e_rssel:
796 final_type = R_HPPA_GOTOFF_RS14;
797 break;
798 case e_rdsel:
799 final_type = R_HPPA_GOTOFF_RD14;
800 break;
801 case e_rrsel:
802 final_type = R_HPPA_GOTOFF_RR14;
803 break;
804 case e_fsel:
805 final_type = R_HPPA_GOTOFF_14;
806 break;
807 default:
808 abort ();
809 break;
810 }
811 break;
812
813 case 21:
814 switch (field)
815 {
816 case e_lsel:
817 final_type = R_HPPA_GOTOFF_L21;
818 break;
819 case e_lssel:
820 final_type = R_HPPA_GOTOFF_LS21;
821 break;
822 case e_ldsel:
823 final_type = R_HPPA_GOTOFF_LD21;
824 break;
825 case e_lrsel:
826 final_type = R_HPPA_GOTOFF_LR21;
827 break;
828 default:
829 abort ();
830 break;
831 }
832 break;
833
834 default:
835 abort ();
836 break;
837 }
838 break;
839
840
841 case R_HPPA_PCREL_CALL:
842 switch (format)
843 {
844 case 11:
845 switch (field)
846 {
847 case e_rsel:
848 final_type = R_HPPA_PCREL_CALL_R11;
849 break;
850 case e_rssel:
851 final_type = R_HPPA_PCREL_CALL_RS11;
852 break;
853 case e_rdsel:
854 final_type = R_HPPA_PCREL_CALL_RD11;
855 break;
856 case e_fsel:
857 final_type = R_HPPA_PCREL_CALL_11;
858 break;
859 default:
860 abort ();
861 break;
862 }
863 break;
864
865 case 14:
866 switch (field)
867 {
868 case e_rsel:
869 final_type = R_HPPA_PCREL_CALL_R14;
870 break;
871 case e_rssel:
872 final_type = R_HPPA_PCREL_CALL_RS14;
873 break;
874 case e_rdsel:
875 final_type = R_HPPA_PCREL_CALL_RD14;
876 break;
877 case e_rrsel:
878 final_type = R_HPPA_PCREL_CALL_RR14;
879 break;
880 case e_fsel:
881 final_type = R_HPPA_PCREL_CALL_14;
882 break;
883 default:
884 abort ();
885 break;
886 }
887 break;
888
889 case 17:
890 switch (field)
891 {
892 case e_rsel:
893 final_type = R_HPPA_PCREL_CALL_R17;
894 break;
895 case e_rssel:
896 final_type = R_HPPA_PCREL_CALL_RS17;
897 break;
898 case e_rdsel:
899 final_type = R_HPPA_PCREL_CALL_RD17;
900 break;
901 case e_rrsel:
902 final_type = R_HPPA_PCREL_CALL_RR17;
903 break;
904 case e_fsel:
905 final_type = R_HPPA_PCREL_CALL_17;
906 break;
907 default:
908 abort ();
909 break;
910 }
911 break;
912
913 case 21:
914 switch (field)
915 {
916 case e_lsel:
917 final_type = R_HPPA_PCREL_CALL_L21;
918 break;
919 case e_lssel:
920 final_type = R_HPPA_PCREL_CALL_LS21;
921 break;
922 case e_ldsel:
923 final_type = R_HPPA_PCREL_CALL_LD21;
924 break;
925 case e_lrsel:
926 final_type = R_HPPA_PCREL_CALL_LR21;
927 break;
928 default:
929 abort ();
930 break;
931 }
932 break;
933
934 default:
935 abort ();
936 break;
937 }
938 break;
939
940
941 case R_HPPA_PLABEL:
942 switch (format)
943 {
944 case 11:
945 switch (field)
946 {
947 case e_fsel:
948 final_type = R_HPPA_PLABEL_11;
949 break;
950 case e_rsel:
951 final_type = R_HPPA_PLABEL_R11;
952 break;
953 default:
954 abort ();
955 break;
956 }
957 break;
958
959 case 14:
960 switch (field)
961 {
962 case e_fsel:
963 final_type = R_HPPA_PLABEL_14;
964 break;
965 case e_rsel:
966 final_type = R_HPPA_PLABEL_R14;
967 break;
968 default:
969 abort ();
970 break;
971 }
972 break;
973
974 case 21:
975 switch (field)
976 {
977 case e_lsel:
978 final_type = R_HPPA_PLABEL_L21;
979 break;
980 default:
981 abort ();
982 break;
983 }
984 break;
985
986 case 32:
987 switch (field)
988 {
989 case e_fsel:
990 final_type = R_HPPA_PLABEL_32;
991 break;
992 default:
993 abort ();
994 break;
995 }
996 break;
997
998 default:
999 abort ();
1000 break;
1001 }
1002
1003
1004 case R_HPPA_ABS_CALL:
1005 switch (format)
1006 {
1007 case 11:
1008 switch (field)
1009 {
1010 case e_rsel:
1011 final_type = R_HPPA_ABS_CALL_R11;
1012 break;
1013 case e_rssel:
1014 final_type = R_HPPA_ABS_CALL_RS11;
1015 break;
1016 case e_rdsel:
1017 final_type = R_HPPA_ABS_CALL_RD11;
1018 break;
1019 case e_fsel:
1020 final_type = R_HPPA_ABS_CALL_11;
1021 break;
1022 default:
1023 abort ();
1024 break;
1025 }
1026 break;
1027
1028 case 14:
1029 switch (field)
1030 {
1031 case e_rsel:
1032 final_type = R_HPPA_ABS_CALL_R14;
1033 break;
1034 case e_rssel:
1035 final_type = R_HPPA_ABS_CALL_RS14;
1036 break;
1037 case e_rdsel:
1038 final_type = R_HPPA_ABS_CALL_RD14;
1039 break;
1040 case e_rrsel:
1041 final_type = R_HPPA_ABS_CALL_RR14;
1042 break;
1043 case e_fsel:
1044 final_type = R_HPPA_ABS_CALL_14;
1045 break;
1046 default:
1047 abort ();
1048 break;
1049 }
1050 break;
1051
1052 case 17:
1053 switch (field)
1054 {
1055 case e_rsel:
1056 final_type = R_HPPA_ABS_CALL_R17;
1057 break;
1058 case e_rssel:
1059 final_type = R_HPPA_ABS_CALL_RS17;
1060 break;
1061 case e_rdsel:
1062 final_type = R_HPPA_ABS_CALL_RD17;
1063 break;
1064 case e_rrsel:
1065 final_type = R_HPPA_ABS_CALL_RR17;
1066 break;
1067 case e_fsel:
1068 final_type = R_HPPA_ABS_CALL_17;
1069 break;
1070 default:
1071 abort ();
1072 break;
1073 }
1074 break;
1075
1076 case 21:
1077 switch (field)
1078 {
1079 case e_lsel:
1080 final_type = R_HPPA_ABS_CALL_L21;
1081 break;
1082 case e_lssel:
1083 final_type = R_HPPA_ABS_CALL_LS21;
1084 break;
1085 case e_ldsel:
1086 final_type = R_HPPA_ABS_CALL_LD21;
1087 break;
1088 case e_lrsel:
1089 final_type = R_HPPA_ABS_CALL_LR21;
1090 break;
1091 default:
1092 abort ();
1093 break;
1094 }
1095 break;
1096
1097 default:
1098 abort ();
1099 break;
1100 }
1101 break;
1102
1103
1104 case R_HPPA_UNWIND:
1105 final_type = R_HPPA_UNWIND_ENTRY;
1106 break;
1107
1108
1109 case R_HPPA_COMPLEX:
1110 case R_HPPA_COMPLEX_PCREL_CALL:
1111 case R_HPPA_COMPLEX_ABS_CALL:
1112 /* The code originally here was horribly broken, and apparently
1113 never used. Zap it. When we need complex relocations rewrite
1114 it correctly! */
1115 abort ();
1116 break;
1117
1118 default:
1119 final_type = base_type;
1120 break;
1121 }
1122
1123 return final_types;
1124 }
1125
1126 #undef final_type
1127
1128
1129 /* Actually perform a relocation. */
1130
1131 static bfd_reloc_status_type
1132 hppa_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
1133 error_message)
1134 bfd *abfd;
1135 arelent *reloc_entry;
1136 asymbol *symbol_in;
1137 PTR data;
1138 asection *input_section;
1139 bfd *output_bfd;
1140 char **error_message;
1141 {
1142 unsigned long insn;
1143 long sym_value = 0;
1144 unsigned long addr = reloc_entry->address;
1145 bfd_byte *hit_data = addr + (bfd_byte *) data;
1146 unsigned long r_type = reloc_entry->howto->type;
1147 unsigned long r_field = e_fsel;
1148 boolean r_pcrel = reloc_entry->howto->pc_relative;
1149 unsigned r_format = reloc_entry->howto->bitsize;
1150 long r_addend = reloc_entry->addend;
1151
1152 /* If only performing a partial link, get out early. */
1153 if (output_bfd)
1154 {
1155 reloc_entry->address += input_section->output_offset;
1156 return bfd_reloc_ok;
1157 }
1158
1159 /* If performing final link and the symbol we're relocating against
1160 is undefined, then return an error. */
1161 if (symbol_in && symbol_in->section == &bfd_und_section)
1162 return bfd_reloc_undefined;
1163
1164 /* Get the final relocated value. */
1165 sym_value = get_symbol_value (symbol_in);
1166
1167 /* Compute the value of $global$.
1168 FIXME: None of this should be necessary. $global$ is just a
1169 marker and shouldn't really figure into these computations.
1170
1171 Once that's fixed we'll need to teach this backend to change
1172 DP-relative relocations involving symbols in the text section
1173 to be simple absolute relocations. */
1174 if (!global_sym_defined)
1175 {
1176 if (global_symbol)
1177 {
1178 global_value = (global_symbol->value
1179 + global_symbol->section->output_section->vma
1180 + global_symbol->section->output_offset);
1181 GOT_value = global_value;
1182 global_sym_defined++;
1183 }
1184 }
1185
1186 /* Get the instruction word. */
1187 insn = bfd_get_32 (abfd, hit_data);
1188
1189 /* Relocate the value based on one of the basic relocation types
1190
1191 basic_type_1: relocation is relative to $global$
1192 basic_type_2: relocation is relative to the current GOT
1193 basic_type_3: relocation is an absolute call
1194 basic_type_4: relocation is an PC-relative call
1195 basic_type_5: relocation is plabel reference
1196 basic_type_6: relocation is an unwind table relocation
1197 extended_type: unimplemented */
1198
1199 switch (r_type)
1200 {
1201 case R_HPPA_NONE:
1202 break;
1203
1204 /* Handle all the basic type 1 relocations. */
1205 case R_HPPA_32:
1206 case R_HPPA_11:
1207 case R_HPPA_14:
1208 case R_HPPA_17:
1209 r_field = e_fsel;
1210 goto do_basic_type_1;
1211 case R_HPPA_L21:
1212 r_field = e_lsel;
1213 goto do_basic_type_1;
1214 case R_HPPA_R11:
1215 case R_HPPA_R14:
1216 case R_HPPA_R17:
1217 r_field = e_rsel;
1218 goto do_basic_type_1;
1219 case R_HPPA_LS21:
1220 r_field = e_lssel;
1221 goto do_basic_type_1;
1222 case R_HPPA_RS11:
1223 case R_HPPA_RS14:
1224 case R_HPPA_RS17:
1225 r_field = e_ldsel;
1226 goto do_basic_type_1;
1227 case R_HPPA_LD21:
1228 r_field = e_ldsel;
1229 goto do_basic_type_1;
1230 case R_HPPA_RD11:
1231 case R_HPPA_RD14:
1232 case R_HPPA_RD17:
1233 r_field = e_rdsel;
1234 goto do_basic_type_1;
1235 case R_HPPA_LR21:
1236 r_field = e_lrsel;
1237 goto do_basic_type_1;
1238 case R_HPPA_RR14:
1239 case R_HPPA_RR17:
1240 r_field = e_rrsel;
1241
1242 do_basic_type_1:
1243 insn = hppa_elf_relocate_insn (abfd, input_section, insn, addr,
1244 sym_value, r_addend, r_format,
1245 r_field, r_pcrel);
1246 break;
1247
1248 /* Handle all the basic type 2 relocations. */
1249 case R_HPPA_GOTOFF_11:
1250 case R_HPPA_GOTOFF_14:
1251 r_field = e_fsel;
1252 goto do_basic_type_2;
1253 case R_HPPA_GOTOFF_L21:
1254 r_field = e_lsel;
1255 goto do_basic_type_2;
1256 case R_HPPA_GOTOFF_R11:
1257 case R_HPPA_GOTOFF_R14:
1258 r_field = e_rsel;
1259 goto do_basic_type_2;
1260 case R_HPPA_GOTOFF_LS21:
1261 r_field = e_lssel;
1262 goto do_basic_type_2;
1263 case R_HPPA_GOTOFF_RS11:
1264 case R_HPPA_GOTOFF_RS14:
1265 r_field = e_rssel;
1266 goto do_basic_type_2;
1267 case R_HPPA_GOTOFF_LD21:
1268 r_field = e_ldsel;
1269 goto do_basic_type_2;
1270 case R_HPPA_GOTOFF_RD11:
1271 case R_HPPA_GOTOFF_RD14:
1272 r_field = e_rdsel;
1273 goto do_basic_type_2;
1274 case R_HPPA_GOTOFF_LR21:
1275 r_field = e_lrsel;
1276 goto do_basic_type_2;
1277 case R_HPPA_GOTOFF_RR14:
1278 r_field = e_rrsel;
1279
1280 do_basic_type_2:
1281 sym_value -= GOT_value;
1282 insn = hppa_elf_relocate_insn (abfd, input_section, insn, addr,
1283 sym_value, r_addend, r_format,
1284 r_field, r_pcrel);
1285 break;
1286
1287 /* Handle all the basic type 3 relocations. */
1288 case R_HPPA_ABS_CALL_11:
1289 case R_HPPA_ABS_CALL_14:
1290 case R_HPPA_ABS_CALL_17:
1291 r_field = e_fsel;
1292 goto do_basic_type_3;
1293 case R_HPPA_ABS_CALL_L21:
1294 r_field = e_lsel;
1295 goto do_basic_type_3;
1296 case R_HPPA_ABS_CALL_R11:
1297 case R_HPPA_ABS_CALL_R14:
1298 case R_HPPA_ABS_CALL_R17:
1299 r_field = e_rsel;
1300 goto do_basic_type_3;
1301 case R_HPPA_ABS_CALL_LS21:
1302 r_field = e_lssel;
1303 goto do_basic_type_3;
1304 case R_HPPA_ABS_CALL_RS11:
1305 case R_HPPA_ABS_CALL_RS14:
1306 case R_HPPA_ABS_CALL_RS17:
1307 r_field = e_rssel;
1308 goto do_basic_type_3;
1309 case R_HPPA_ABS_CALL_LD21:
1310 r_field = e_ldsel;
1311 goto do_basic_type_3;
1312 case R_HPPA_ABS_CALL_RD11:
1313 case R_HPPA_ABS_CALL_RD14:
1314 case R_HPPA_ABS_CALL_RD17:
1315 r_field = e_rdsel;
1316 goto do_basic_type_3;
1317 case R_HPPA_ABS_CALL_LR21:
1318 r_field = e_lrsel;
1319 goto do_basic_type_3;
1320 case R_HPPA_ABS_CALL_RR14:
1321 case R_HPPA_ABS_CALL_RR17:
1322 r_field = e_rrsel;
1323
1324 do_basic_type_3:
1325 insn = hppa_elf_relocate_insn (abfd, input_section, insn, addr,
1326 sym_value, r_addend, r_format,
1327 r_field, r_pcrel);
1328 break;
1329
1330 /* Handle all the basic type 4 relocations. */
1331 case R_HPPA_PCREL_CALL_11:
1332 case R_HPPA_PCREL_CALL_14:
1333 case R_HPPA_PCREL_CALL_17:
1334 r_field = e_fsel;
1335 goto do_basic_type_4;
1336 case R_HPPA_PCREL_CALL_L21:
1337 r_field = e_lsel;
1338 goto do_basic_type_4;
1339 case R_HPPA_PCREL_CALL_R11:
1340 case R_HPPA_PCREL_CALL_R14:
1341 case R_HPPA_PCREL_CALL_R17:
1342 r_field = e_rsel;
1343 goto do_basic_type_4;
1344 case R_HPPA_PCREL_CALL_LS21:
1345 r_field = e_lssel;
1346 goto do_basic_type_4;
1347 case R_HPPA_PCREL_CALL_RS11:
1348 case R_HPPA_PCREL_CALL_RS14:
1349 case R_HPPA_PCREL_CALL_RS17:
1350 r_field = e_rssel;
1351 goto do_basic_type_4;
1352 case R_HPPA_PCREL_CALL_LD21:
1353 r_field = e_ldsel;
1354 goto do_basic_type_4;
1355 case R_HPPA_PCREL_CALL_RD11:
1356 case R_HPPA_PCREL_CALL_RD14:
1357 case R_HPPA_PCREL_CALL_RD17:
1358 r_field = e_rdsel;
1359 goto do_basic_type_4;
1360 case R_HPPA_PCREL_CALL_LR21:
1361 r_field = e_lrsel;
1362 goto do_basic_type_4;
1363 case R_HPPA_PCREL_CALL_RR14:
1364 case R_HPPA_PCREL_CALL_RR17:
1365 r_field = e_rrsel;
1366
1367 do_basic_type_4:
1368 insn = hppa_elf_relocate_insn (abfd, input_section, insn, addr,
1369 sym_value, r_addend, r_format,
1370 r_field, r_pcrel);
1371 break;
1372
1373 /* Handle all the basic type 5 relocations. */
1374 case R_HPPA_PLABEL_32:
1375 case R_HPPA_PLABEL_11:
1376 case R_HPPA_PLABEL_14:
1377 r_field = e_fsel;
1378 goto do_basic_type_5;
1379 case R_HPPA_PLABEL_L21:
1380 r_field = e_lsel;
1381 goto do_basic_type_5;
1382 case R_HPPA_PLABEL_R11:
1383 case R_HPPA_PLABEL_R14:
1384 r_field = e_rsel;
1385 do_basic_type_5:
1386 insn = hppa_elf_relocate_insn (abfd, input_section, insn, addr,
1387 sym_value, r_addend, r_format,
1388 r_field, r_pcrel);
1389 break;
1390
1391 /* Handle all basic type 6 relocations. */
1392 case R_HPPA_UNWIND_ENTRY:
1393 case R_HPPA_UNWIND_ENTRIES:
1394 hppa_elf_relocate_unwind_table (abfd, data, addr,
1395 sym_value, r_addend,
1396 r_type, r_field);
1397 return bfd_reloc_ok;
1398
1399 /* This is a linker internal relocation. */
1400 case R_HPPA_STUB_CALL_17:
1401 /* This relocation is for a branch to a long branch stub.
1402 Change instruction to a BLE,N. It may also be necessary
1403 to interchange the branch and its delay slot.
1404 The original instruction stream is
1405
1406 bl <foo>,r ; call foo using register r as
1407 ; the return pointer
1408 XXX ; delay slot instruction
1409
1410 The new instruction stream will be:
1411
1412 XXX ; delay slot instruction
1413 ble <foo_stub> ; call the long call stub for foo
1414 ; using r31 as the return pointer
1415
1416 This braindamage is necessary because the compiler may put
1417 an instruction which uses %r31 in the delay slot of the original
1418 call. By changing the call instruction from a "bl" to a "ble"
1419 %r31 gets clobbered before the delay slot executes. This
1420 also means the stub has to play funny games to make sure
1421 we return to the instruction just after the BLE rather than
1422 two instructions after the BLE.
1423
1424 We do not interchange the branch and delay slot if the delay
1425 slot was already nullified, or if the instruction in the delay
1426 slot modifies the return pointer to avoid an unconditional
1427 jump after the call returns (GCC optimization).
1428
1429 None of this horseshit would be necessary if we put the
1430 stubs between functions and just redirected the "bl" to
1431 the stub. Live and learn. */
1432
1433 /* Is this instruction nullified? (does this ever happen?) */
1434 if (insn & 2)
1435 {
1436 insn = BLE_N_XXX_0_0;
1437 bfd_put_32 (abfd, insn, hit_data);
1438 r_type = R_HPPA_ABS_CALL_17;
1439 r_pcrel = 0;
1440 insn = hppa_elf_relocate_insn (abfd, input_section, insn,
1441 addr, sym_value, r_addend,
1442 r_format, r_field, r_pcrel);
1443 }
1444 else
1445 {
1446 /* So much for the trivial case... */
1447 unsigned long old_delay_slot_insn = bfd_get_32 (abfd, hit_data + 4);
1448 unsigned rtn_reg = (insn & 0x03e00000) >> 21;
1449
1450 if (get_opcode (old_delay_slot_insn) == LDO)
1451 {
1452 unsigned ldo_src_reg = (old_delay_slot_insn & 0x03e00000) >> 21;
1453 unsigned ldo_target_reg = (old_delay_slot_insn & 0x001f0000) >> 16;
1454
1455 /* If the target of the LDO is the same as the return
1456 register then there is no reordering. We can leave the
1457 instuction as a non-nullified BLE in this case.
1458
1459 FIXME: This test looks wrong. If we had a ble using
1460 ldo_target_reg as the *source* we'd fuck this up. */
1461 if (ldo_target_reg == rtn_reg)
1462 {
1463 unsigned long new_delay_slot_insn = old_delay_slot_insn;
1464
1465 BFD_ASSERT (ldo_src_reg == ldo_target_reg);
1466 new_delay_slot_insn &= 0xfc00ffff;
1467 new_delay_slot_insn |= ((31 << 21) | (31 << 16));
1468 bfd_put_32 (abfd, new_delay_slot_insn, hit_data + 4);
1469 insn = BLE_XXX_0_0;
1470 r_type = R_HPPA_ABS_CALL_17;
1471 r_pcrel = 0;
1472 insn = hppa_elf_relocate_insn (abfd, input_section, insn,
1473 addr, sym_value, r_addend,
1474 r_format, r_field, r_pcrel);
1475 bfd_put_32 (abfd, insn, hit_data);
1476 return bfd_reloc_ok;
1477 }
1478 else if (rtn_reg == 31)
1479 {
1480 /* The return register is r31, so this is a millicode
1481 call. Do not perform any instruction reordering. */
1482 insn = BLE_XXX_0_0;
1483 r_type = R_HPPA_ABS_CALL_17;
1484 r_pcrel = 0;
1485 insn = hppa_elf_relocate_insn (abfd, input_section, insn,
1486 addr, sym_value,
1487 r_addend, r_format,
1488 r_field, r_pcrel);
1489 bfd_put_32 (abfd, insn, hit_data);
1490 return bfd_reloc_ok;
1491 }
1492 else
1493 {
1494 /* Check to see if the delay slot instruction has a
1495 relocation. If so, we need to change the address
1496 field of it because the instruction it relocates
1497 is going to be moved. Oh what a mess. */
1498 arelent * next_reloc_entry = reloc_entry+1;
1499
1500 if (next_reloc_entry->address == reloc_entry->address + 4)
1501 next_reloc_entry->address -= 4;
1502
1503 insn = old_delay_slot_insn;
1504 bfd_put_32 (abfd, insn, hit_data);
1505 insn = BLE_N_XXX_0_0;
1506 bfd_put_32 (abfd, insn, hit_data + 4);
1507 r_type = R_HPPA_ABS_CALL_17;
1508 r_pcrel = 0;
1509 insn = hppa_elf_relocate_insn (abfd, input_section, insn,
1510 addr + 4,
1511 sym_value, r_addend,
1512 r_format, r_field, r_pcrel);
1513 bfd_put_32 (abfd, insn, hit_data + 4);
1514 return bfd_reloc_ok;
1515 }
1516 }
1517 /* Same comments as above regarding incorrect test. */
1518 else if (rtn_reg == 31)
1519 {
1520 /* The return register is r31, so this is a millicode call.
1521 Perform no instruction reordering in this case. */
1522 insn = BLE_XXX_0_0;
1523 r_type = R_HPPA_ABS_CALL_17;
1524 r_pcrel = 0;
1525 insn = hppa_elf_relocate_insn (abfd, input_section, insn,
1526 addr, sym_value,
1527 r_addend, r_format,
1528 r_field, r_pcrel);
1529 bfd_put_32 (abfd, insn, hit_data);
1530 return bfd_reloc_ok;
1531 }
1532 else
1533 {
1534 /* Check to see if the delay slot instruction has a
1535 relocation. If so, we need to change its address
1536 field because the instruction it relocates is going
1537 to be moved. */
1538 arelent * next_reloc_entry = reloc_entry+1;
1539
1540 if (next_reloc_entry->address == reloc_entry->address + 4)
1541 next_reloc_entry->address -= 4;
1542
1543 insn = old_delay_slot_insn;
1544 bfd_put_32 (abfd, insn, hit_data);
1545 insn = BLE_N_XXX_0_0;
1546 bfd_put_32 (abfd, insn, hit_data + 4);
1547 r_type = R_HPPA_ABS_CALL_17;
1548 r_pcrel = 0;
1549 insn = hppa_elf_relocate_insn (abfd, input_section, insn,
1550 addr + 4, sym_value,
1551 r_addend, r_format,
1552 r_field, r_pcrel);
1553 bfd_put_32 (abfd, insn, hit_data + 4);
1554 return bfd_reloc_ok;
1555 }
1556 }
1557 break;
1558
1559 /* Something we don't know how to handle. */
1560 default:
1561 *error_message = (char *) "Unrecognized reloc";
1562 return bfd_reloc_notsupported;
1563 }
1564
1565 /* Update the instruction word. */
1566 bfd_put_32 (abfd, insn, hit_data);
1567 return (bfd_reloc_ok);
1568 }
1569
1570 /* Return the address of the howto table entry to perform the CODE
1571 relocation for an ARCH machine. */
1572
1573 static CONST reloc_howto_type *
1574 elf_hppa_reloc_type_lookup (arch, code)
1575 bfd_arch_info_type *arch;
1576 bfd_reloc_code_real_type code;
1577 {
1578 if ((int) code < (int) R_HPPA_UNIMPLEMENTED)
1579 {
1580 BFD_ASSERT ((int) elf_hppa_howto_table[(int) code].type == (int) code);
1581 return &elf_hppa_howto_table[(int) code];
1582 }
1583 return NULL;
1584 }
1585
1586 /* Return true if SYM represents a local label symbol. */
1587
1588 static boolean
1589 hppa_elf_is_local_label (abfd, sym)
1590 bfd *abfd;
1591 asymbol *sym;
1592 {
1593 return (sym->name[0] == 'L' && sym->name[1] == '$');
1594 }
1595
1596 /* Update the symbol extention chain to include the symbol pointed to
1597 by SYMBOLP if SYMBOLP is a function symbol. Used internally and by GAS. */
1598
1599 void
1600 elf_hppa_tc_symbol (abfd, symbolP, sym_idx, symext_root, symext_last)
1601 bfd *abfd;
1602 elf_symbol_type *symbolP;
1603 int sym_idx;
1604 symext_chainS **symext_root;
1605 symext_chainS **symext_last;
1606 {
1607 symext_chainS *symextP;
1608 unsigned int arg_reloc;
1609
1610 /* Only functions can have argument relocations. */
1611 if (!(symbolP->symbol.flags & BSF_FUNCTION))
1612 return;
1613
1614 arg_reloc = symbolP->tc_data.hppa_arg_reloc;
1615
1616 /* If there are no argument relocation bits, then no relocation is
1617 necessary. Do not add this to the symextn section. */
1618 if (arg_reloc == 0)
1619 return;
1620
1621 /* Allocate memory and initialize this entry. */
1622 symextP = (symext_chainS *) bfd_alloc (abfd, sizeof (symext_chainS) * 2);
1623 if (!symextP)
1624 {
1625 bfd_set_error (bfd_error_no_memory);
1626 abort(); /* FIXME */
1627 }
1628
1629 symextP[0].entry = ELF32_HPPA_SX_WORD (HPPA_SXT_SYMNDX, sym_idx);
1630 symextP[0].next = &symextP[1];
1631
1632 symextP[1].entry = ELF32_HPPA_SX_WORD (HPPA_SXT_ARG_RELOC, arg_reloc);
1633 symextP[1].next = NULL;
1634
1635 /* Now update the chain itself so it can be walked later to build
1636 the symbol extension section. */
1637 if (*symext_root == NULL)
1638 {
1639 *symext_root = &symextP[0];
1640 *symext_last = &symextP[1];
1641 }
1642 else
1643 {
1644 (*symext_last)->next = &symextP[0];
1645 *symext_last = &symextP[1];
1646 }
1647 }
1648
1649 /* Build the symbol extension section. Used internally and by GAS. */
1650
1651 void
1652 elf_hppa_tc_make_sections (abfd, symext_root)
1653 bfd *abfd;
1654 symext_chainS *symext_root;
1655 {
1656 symext_chainS *symextP;
1657 int size, n, i;
1658 asection *symextn_sec;
1659
1660 /* FIXME: Huh? I don't see what this is supposed to do for us. */
1661 hppa_elf_stub_finish (abfd);
1662
1663 /* If there are no entries in the symbol extension chain, then
1664 there is no symbol extension section. */
1665 if (symext_root == NULL)
1666 return;
1667
1668 /* Count the number of entries on the chain. */
1669 for (n = 0, symextP = symext_root; symextP; symextP = symextP->next, ++n)
1670 ;
1671
1672 /* Create the symbol extension section and set some appropriate
1673 attributes. */
1674 size = sizeof (symext_entryS) * n;
1675 symextn_sec = bfd_get_section_by_name (abfd, SYMEXTN_SECTION_NAME);
1676 if (symextn_sec == (asection *) 0)
1677 {
1678 symextn_sec = bfd_make_section (abfd, SYMEXTN_SECTION_NAME);
1679 bfd_set_section_flags (abfd,
1680 symextn_sec,
1681 SEC_LOAD | SEC_HAS_CONTENTS | SEC_DATA);
1682 symextn_sec->output_section = symextn_sec;
1683 symextn_sec->output_offset = 0;
1684 bfd_set_section_alignment (abfd, symextn_sec, 2);
1685 }
1686 bfd_set_section_size (abfd, symextn_sec, symextn_contents_real_size);
1687 symextn_contents_real_size = size;
1688
1689 /* Grab some memory for the contents of the symbol extension section
1690 itself. */
1691 symextn_contents = (symext_entryS *) bfd_alloc (abfd, size);
1692 if (!symextn_contents)
1693 {
1694 bfd_set_error (bfd_error_no_memory);
1695 abort(); /* FIXME */
1696 }
1697
1698 /* Fill in the contents of the symbol extension section. */
1699 for (i = 0, symextP = symext_root; symextP; symextP = symextP->next, ++i)
1700 symextn_contents[i] = symextP->entry;
1701
1702 return;
1703 }
1704
1705 /* Return the symbol extension record of type TYPE for the symbol SYM. */
1706
1707 static symext_entryS
1708 elf32_hppa_get_sym_extn (abfd, sym, type)
1709 bfd *abfd;
1710 asymbol *sym;
1711 int type;
1712 {
1713 switch (type)
1714 {
1715 case HPPA_SXT_SYMNDX:
1716 case HPPA_SXT_NULL:
1717 return (symext_entryS) 0;
1718 case HPPA_SXT_ARG_RELOC:
1719 {
1720 elf_symbol_type *esymP = (elf_symbol_type *) sym;
1721
1722 return (symext_entryS) esymP->tc_data.hppa_arg_reloc;
1723 }
1724 /* This should never happen. */
1725 default:
1726 abort();
1727 }
1728 }
1729
1730 /* Search the chain of stub descriptions and locate the stub
1731 description for this the given section within the given bfd.
1732
1733 FIXME: I see yet another wonderful linear linked list search
1734 here. This is probably bad. */
1735
1736 static elf32_hppa_stub_description *
1737 find_stubs (abfd, stub_sec)
1738 bfd *abfd;
1739 asection *stub_sec;
1740 {
1741 elf32_hppa_stub_description *stubP;
1742
1743 for (stubP = elf_hppa_stub_rootP; stubP; stubP = stubP->next)
1744 {
1745 /* Is this the right one? */
1746 if (stubP->this_bfd == abfd && stubP->stub_sec == stub_sec)
1747 return stubP;
1748 }
1749 return NULL;
1750 }
1751
1752 static elf32_hppa_stub_description *
1753 new_stub (abfd, stub_sec, link_info)
1754 bfd *abfd;
1755 asection *stub_sec;
1756 struct bfd_link_info *link_info;
1757 {
1758 elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
1759
1760 /* If we found a list for this bfd, then use it. */
1761 if (stub)
1762 return stub;
1763
1764 /* Nope, allocate and initialize a new entry in the stub list chain. */
1765 stub = (elf32_hppa_stub_description *)
1766 bfd_zalloc (abfd, sizeof (elf32_hppa_stub_description));
1767 if (stub)
1768 {
1769 stub->this_bfd = abfd;
1770 stub->stub_sec = stub_sec;
1771 stub->real_size = 0;
1772 stub->allocated_size = 0;
1773 stub->stub_contents = NULL;
1774 stub->stub_secp = NULL;
1775 stub->link_info = link_info;
1776
1777 stub->next = elf_hppa_stub_rootP;
1778 elf_hppa_stub_rootP = stub;
1779 }
1780 else
1781 {
1782 bfd_set_error (bfd_error_no_memory);
1783 abort(); /* FIXME */
1784 }
1785
1786 return stub;
1787 }
1788
1789 /* Try and locate a stub with the name NAME within the stubs
1790 associated with ABFD. More linked list searches. */
1791
1792 static elf32_hppa_stub_name_list *
1793 find_stub_by_name (abfd, stub_sec, name)
1794 bfd *abfd;
1795 asection *stub_sec;
1796 char *name;
1797 {
1798 /* Find the stubs associated with this bfd. */
1799 elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
1800
1801 /* If found, then we have to walk down them looking for a match. */
1802 if (stub)
1803 {
1804 elf32_hppa_stub_name_list *name_listP;
1805
1806 for (name_listP = stub->stub_listP;
1807 name_listP;
1808 name_listP = name_listP->next)
1809 {
1810 if (!strcmp (name_listP->sym->name, name))
1811 return name_listP;
1812 }
1813 }
1814
1815 /* Not found. */
1816 return 0;
1817 }
1818
1819 /* Add a new stub (SYM) to the list of stubs associated with the given BFD. */
1820 static elf32_hppa_stub_name_list *
1821 add_stub_by_name(abfd, stub_sec, sym, link_info)
1822 bfd *abfd;
1823 asection *stub_sec;
1824 asymbol *sym;
1825 struct bfd_link_info *link_info;
1826 {
1827 elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
1828 elf32_hppa_stub_name_list *stub_entry;
1829
1830 /* If no stubs are associated with this bfd, then we have to make
1831 a chain-of-stubs associated with this bfd. */
1832 if (!stub)
1833 stub = new_stub (abfd, stub_sec, link_info);
1834
1835 if (stub)
1836 {
1837 /* Allocate and initialize an entry in the stub chain. */
1838 stub_entry = (elf32_hppa_stub_name_list *)
1839 bfd_zalloc (abfd, sizeof (elf32_hppa_stub_name_list));
1840
1841 if (stub_entry)
1842 {
1843 stub_entry->size = 0;
1844 stub_entry->sym = sym;
1845 stub_entry->stub_desc = stub;
1846 /* First byte of this stub is the pointer to
1847 the next available location in the stub buffer. */
1848 stub_entry->stub_secp = stub->stub_secp;
1849 /* Add it to the chain. */
1850 if (stub->stub_listP)
1851 stub_entry->next = stub->stub_listP;
1852 else
1853 stub_entry->next = NULL;
1854 stub->stub_listP = stub_entry;
1855 return stub_entry;
1856 }
1857 else
1858 {
1859 bfd_set_error (bfd_error_no_memory);
1860 abort(); /* FIXME */
1861 }
1862 }
1863 /* Death by mis-adventure. */
1864 abort ();
1865 return (elf32_hppa_stub_name_list *)NULL;
1866 }
1867
1868 /* For the given caller/callee argument location information and the
1869 type of relocation (arguments or return value), return the type
1870 of argument relocation needed to make caller and callee happy. */
1871
1872 static arg_reloc_type
1873 type_of_mismatch (caller_bits, callee_bits, type)
1874 int caller_bits;
1875 int callee_bits;
1876 int type;
1877 {
1878 switch (type)
1879 {
1880 case ARGUMENTS:
1881 return mismatches[caller_bits][callee_bits];
1882 case RETURN_VALUE:
1883 return retval_mismatches[caller_bits][callee_bits];
1884 }
1885 return ARG_RELOC_ERR;
1886 }
1887
1888 /* Extract specific argument location bits for WHICH from the
1889 the full argument location information in AR. */
1890 #define EXTRACT_ARBITS(ar, which) ((ar) >> (8 - ((which) * 2))) & 3
1891
1892 /* Add the new instruction INSN into the stub area denoted by ENTRY.
1893 FIXME: Looks like more cases where we assume sizeof (int) ==
1894 sizeof (insn) which may not be true if building cross tools. */
1895 #define NEW_INSTRUCTION(entry, insn) \
1896 { \
1897 *((entry)->stub_desc->stub_secp)++ = (insn); \
1898 (entry)->stub_desc->real_size += sizeof (int); \
1899 (entry)->size += sizeof(int); \
1900 bfd_set_section_size((entry)->stub_desc->this_bfd, \
1901 (entry)->stub_desc->stub_sec, \
1902 (entry)->stub_desc->real_size); \
1903 }
1904
1905 /* Find the offset of the current stub? Looks more like it
1906 finds the offset of the last instruction to me. */
1907 #define CURRENT_STUB_OFFSET(entry) \
1908 ((char *)(entry)->stub_desc->stub_secp \
1909 - (char *)(entry)->stub_desc->stub_contents - 4)
1910
1911 /* All the stubs have already been built, finish up stub stuff
1912 by applying relocations to the stubs. */
1913
1914 static void
1915 hppa_elf_stub_finish (output_bfd)
1916 bfd *output_bfd;
1917 {
1918 elf32_hppa_stub_description *stub_list = elf_hppa_stub_rootP;
1919
1920 /* If the stubs have been finished, then we're already done. */
1921 if (stubs_finished)
1922 return;
1923
1924 /* Walk down the list of stub lists. */
1925 for (; stub_list; stub_list = stub_list->next)
1926 {
1927 /* If this list has stubs, then do something. */
1928 if (stub_list->real_size)
1929 {
1930 bfd *stub_bfd = stub_list->this_bfd;
1931 asection *stub_sec = bfd_get_section_by_name (stub_bfd,
1932 ".hppa_linker_stubs");
1933 bfd_size_type reloc_size;
1934 arelent **reloc_vector;
1935
1936 /* Some sanity checking. */
1937 BFD_ASSERT (stub_sec == stub_list->stub_sec);
1938 BFD_ASSERT (stub_sec);
1939
1940 /* For stub sections raw_size == cooked_size. Also update
1941 reloc_done as we're handling the relocs now. */
1942 stub_sec->_cooked_size = stub_sec->_raw_size;
1943 stub_sec->reloc_done = true;
1944
1945 /* Make space to hold the relocations for the stub section. */
1946 reloc_size = bfd_get_reloc_upper_bound (stub_bfd, stub_sec);
1947 reloc_vector = (arelent **) malloc (reloc_size);
1948 if (reloc_vector == NULL && reloc_size != 0)
1949 {
1950 /* FIXME: should be returning an error so the caller can
1951 clean up */
1952 abort ();
1953 }
1954
1955 /* If we have relocations, do them. */
1956 if (bfd_canonicalize_reloc (stub_bfd, stub_sec, reloc_vector,
1957 output_bfd->outsymbols))
1958 {
1959 arelent **parent;
1960 for (parent = reloc_vector; *parent != NULL; parent++)
1961 {
1962 char *err = NULL;
1963 bfd_reloc_status_type r =
1964 bfd_perform_relocation (stub_bfd, *parent,
1965 stub_list->stub_contents,
1966 stub_sec, (bfd *) NULL, &err);
1967
1968 /* If there was an error, tell someone about it. */
1969 if (r != bfd_reloc_ok)
1970 {
1971 struct bfd_link_info *link_info = stub_list->link_info;
1972
1973 switch (r)
1974 {
1975 case bfd_reloc_undefined:
1976 if (! ((*link_info->callbacks->undefined_symbol)
1977 (link_info,
1978 bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
1979 stub_bfd, stub_sec, (*parent)->address)))
1980 abort ();
1981 break;
1982 case bfd_reloc_dangerous:
1983 if (! ((*link_info->callbacks->reloc_dangerous)
1984 (link_info, err, stub_bfd, stub_sec,
1985 (*parent)->address)))
1986 abort ();
1987 break;
1988 case bfd_reloc_overflow:
1989 {
1990 if (! ((*link_info->callbacks->reloc_overflow)
1991 (link_info,
1992 bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
1993 (*parent)->howto->name,
1994 (*parent)->addend,
1995 stub_bfd, stub_sec,
1996 (*parent)->address)))
1997 abort ();
1998 }
1999 break;
2000 case bfd_reloc_outofrange:
2001 default:
2002 abort ();
2003 break;
2004 }
2005 }
2006 }
2007 }
2008 free (reloc_vector);
2009
2010 /* All done with the relocations. Set the final contents
2011 of the stub section. FIXME: no check of return value! */
2012 bfd_set_section_contents (output_bfd, stub_sec,
2013 stub_list->stub_contents,
2014 0, stub_list->real_size);
2015 }
2016 }
2017 /* All done. */
2018 stubs_finished = true;
2019 }
2020
2021 /* Allocate a new relocation entry to be used in a linker stub. */
2022
2023 static void
2024 hppa_elf_stub_reloc (stub_desc, output_bfd, target_sym, offset, type)
2025 elf32_hppa_stub_description *stub_desc;
2026 bfd *output_bfd;
2027 asymbol **target_sym;
2028 int offset;
2029 elf32_hppa_reloc_type type;
2030 {
2031 arelent relent;
2032 int size;
2033 Elf_Internal_Shdr *rela_hdr;
2034
2035 /* I really don't like the realloc nonsense in here. FIXME. */
2036 if (stub_desc->relocs_allocated_cnt == stub_desc->stub_sec->reloc_count)
2037 {
2038 /* Allocate the first few relocation entries. */
2039 if (stub_desc->stub_sec->relocation == NULL)
2040 {
2041 stub_desc->relocs_allocated_cnt = STUB_RELOC_INCR;
2042 size = sizeof (arelent) * stub_desc->relocs_allocated_cnt;
2043 stub_desc->stub_sec->relocation = (arelent *) bfd_zmalloc (size);
2044 }
2045 else
2046 {
2047 /* We've used all the entries we've already allocated. So get
2048 some more. */
2049 stub_desc->relocs_allocated_cnt += STUB_RELOC_INCR;
2050 size = sizeof (arelent) * stub_desc->relocs_allocated_cnt;
2051 stub_desc->stub_sec->relocation = (arelent *)
2052 realloc (stub_desc->stub_sec->relocation, size);
2053 }
2054 if (!stub_desc->stub_sec->relocation)
2055 {
2056 bfd_set_error (bfd_error_no_memory);
2057 abort (); /* FIXME */
2058 }
2059 }
2060
2061 rela_hdr = &elf_section_data(stub_desc->stub_sec)->rel_hdr;
2062 rela_hdr->sh_size += sizeof(Elf32_External_Rela);
2063
2064 /* Fill in the details. */
2065 relent.address = offset;
2066 relent.addend = 0;
2067 relent.sym_ptr_ptr = target_sym;
2068 relent.howto = bfd_reloc_type_lookup (stub_desc->this_bfd, type);
2069
2070 /* Save it in the array of relocations for the stub section. */
2071 memcpy (&stub_desc->stub_sec->relocation[stub_desc->stub_sec->reloc_count++],
2072 &relent, sizeof (arelent));
2073 }
2074
2075 /* Build an argument relocation stub. RTN_ADJUST is a hint that an
2076 adjust to the return pointer from within the stub itself may be
2077 needed. */
2078
2079 static asymbol *
2080 hppa_elf_build_linker_stub (abfd, output_bfd, link_info, reloc_entry,
2081 stub_types, rtn_adjust, data, linker_stub_type)
2082 bfd *abfd;
2083 bfd *output_bfd;
2084 struct bfd_link_info *link_info;
2085 arelent *reloc_entry;
2086 arg_reloc_type stub_types[5];
2087 int rtn_adjust;
2088 unsigned *data;
2089 hppa_stub_type linker_stub_type;
2090 {
2091 int i;
2092 boolean milli, dyncall;
2093 char stub_sym_name[128];
2094 elf32_hppa_stub_name_list *stub_entry;
2095 /* Some initialization. */
2096 unsigned insn = data[0];
2097 asymbol *stub_sym = NULL;
2098 asymbol **orig_sym = reloc_entry->sym_ptr_ptr;
2099 asection *stub_sec = bfd_get_section_by_name (abfd, ".hppa_linker_stubs");
2100 elf32_hppa_stub_description *stub_desc = find_stubs (abfd, stub_sec);
2101
2102 /* Perform some additional checks on whether we should really do the
2103 return adjustment. For example, if the instruction is nullified
2104 or if the delay slot contains an instruction that modifies the return
2105 pointer, then the branch instructions should not be rearranged
2106 (rtn_adjust is false). */
2107 if (insn & 2 || insn == 0)
2108 rtn_adjust = false;
2109 else
2110 {
2111 unsigned delay_insn = data[1];
2112
2113 if (get_opcode (delay_insn) == LDO
2114 && (((insn & 0x03e00000) >> 21) == ((delay_insn & 0x001f0000) >> 16)))
2115 rtn_adjust = false;
2116 }
2117
2118 /* Some special code for long-call stubs. */
2119 if (linker_stub_type == HPPA_STUB_LONG_CALL)
2120 {
2121
2122 /* Is this a millicode call? If so, the return address
2123 comes in on r31 rather than r2 (rp) so a slightly
2124 different code sequence is needed. */
2125 unsigned rtn_reg = (insn & 0x03e00000) >> 21;
2126 if (rtn_reg == 31)
2127 milli = true;
2128
2129 /* Dyncall is special because the user code has already
2130 put the return pointer in %r2 (aka RP). Other millicode
2131 calls have the return pointer in %r31. */
2132 if (strcmp ((*orig_sym)->name, "$$dyncall") == 0)
2133 dyncall = true;
2134
2135 /* If we are creating a call from a stub to another stub, then
2136 never do the instruction reordering. We can tell if we are
2137 going to be calling one stub from another by the fact that
2138 the symbol name has '_stub_' (arg. reloc. stub) or '_lb_stub_'
2139 prepended to the name. Alternatively, the section of the
2140 symbol will be '.hppa_linker_stubs'. This is only an issue
2141 for long-calls; they are the only stubs allowed to call another
2142 stub. */
2143 if ((strncmp ((*orig_sym)->name, "_stub_", 6) == 0)
2144 || (strncmp ((*orig_sym)->name, "_lb_stub_", 9) == 0))
2145 {
2146 BFD_ASSERT (strcmp ((*orig_sym)->section->name, ".hppa_linker_stubs")
2147 == 0);
2148 rtn_adjust = false;
2149 }
2150 }
2151
2152 /* Create the stub section if necessary. */
2153 if (!stub_sec)
2154 {
2155 BFD_ASSERT (stub_desc == NULL);
2156 hppa_elf_create_stub_sec (abfd, output_bfd, &stub_sec, link_info);
2157 stub_desc = new_stub (abfd, stub_sec, link_info);
2158 }
2159
2160 /* Make the stub if we did not find one already. */
2161 if (!stub_desc)
2162 stub_desc = new_stub (abfd, stub_sec, link_info);
2163
2164 /* Allocate space to write the stub.
2165 FIXME: Why using realloc?!? */
2166 if (!stub_desc->stub_contents)
2167 {
2168 stub_desc->allocated_size = STUB_BUFFER_INCR;
2169 stub_desc->stub_contents = (char *) malloc (STUB_BUFFER_INCR);
2170 }
2171 else if ((stub_desc->allocated_size - stub_desc->real_size) < STUB_MAX_SIZE)
2172 {
2173 stub_desc->allocated_size = stub_desc->allocated_size + STUB_BUFFER_INCR;
2174 stub_desc->stub_contents = (char *) realloc (stub_desc->stub_contents,
2175 stub_desc->allocated_size);
2176 }
2177
2178 /* If no memory die. (I seriously doubt the other routines
2179 are prepared to get a NULL return value). */
2180 if (!stub_desc->stub_contents)
2181 {
2182 bfd_set_error (bfd_error_no_memory);
2183 abort ();
2184 }
2185
2186 /* Generate an appropriate name for this stub. */
2187 if (linker_stub_type == HPPA_STUB_ARG_RELOC)
2188 sprintf (stub_sym_name,
2189 "_stub_%s_%02d_%02d_%02d_%02d_%02d_%s",
2190 reloc_entry->sym_ptr_ptr[0]->name,
2191 stub_types[0], stub_types[1], stub_types[2],
2192 stub_types[3], stub_types[4],
2193 rtn_adjust ? "RA" : "");
2194 else
2195 sprintf (stub_sym_name,
2196 "_lb_stub_%s_%s", reloc_entry->sym_ptr_ptr[0]->name,
2197 rtn_adjust ? "RA" : "");
2198
2199
2200 stub_desc->stub_secp
2201 = (int *) (stub_desc->stub_contents + stub_desc->real_size);
2202 stub_entry = find_stub_by_name (abfd, stub_sec, stub_sym_name);
2203
2204 /* See if we already have one by this name. */
2205 if (stub_entry)
2206 {
2207 /* Yes, re-use it. Redirect the original relocation from the
2208 old symbol (a function symbol) to the stub (the stub will call
2209 the original function). */
2210 stub_sym = stub_entry->sym;
2211 reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (abfd,
2212 sizeof (asymbol **));
2213 if (reloc_entry->sym_ptr_ptr == NULL)
2214 {
2215 bfd_set_error (bfd_error_no_memory);
2216 abort ();
2217 }
2218 reloc_entry->sym_ptr_ptr[0] = stub_sym;
2219 if (linker_stub_type == HPPA_STUB_LONG_CALL
2220 || (reloc_entry->howto->type != R_HPPA_PLABEL_32
2221 && (get_opcode(insn) == BLE
2222 || get_opcode (insn) == BE
2223 || get_opcode (insn) == BL)))
2224 reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_HPPA_STUB_CALL_17);
2225 }
2226 else
2227 {
2228 /* Create a new symbol to point to this stub. */
2229 stub_sym = bfd_make_empty_symbol (abfd);
2230 if (!stub_sym)
2231 {
2232 bfd_set_error (bfd_error_no_memory);
2233 abort ();
2234 }
2235 stub_sym->name = bfd_zalloc (abfd, strlen (stub_sym_name) + 1);
2236 if (!stub_sym->name)
2237 {
2238 bfd_set_error (bfd_error_no_memory);
2239 abort ();
2240 }
2241 strcpy ((char *) stub_sym->name, stub_sym_name);
2242 stub_sym->value
2243 = (char *) stub_desc->stub_secp - (char *) stub_desc->stub_contents;
2244 stub_sym->section = stub_sec;
2245 stub_sym->flags = BSF_LOCAL | BSF_FUNCTION;
2246 stub_entry = add_stub_by_name (abfd, stub_sec, stub_sym, link_info);
2247
2248 /* Redirect the original relocation from the old symbol (a function)
2249 to the stub (the stub calls the function). */
2250 reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (abfd,
2251 sizeof (asymbol **));
2252 if (reloc_entry->sym_ptr_ptr == NULL)
2253 {
2254 bfd_set_error (bfd_error_no_memory);
2255 abort ();
2256 }
2257 reloc_entry->sym_ptr_ptr[0] = stub_sym;
2258 if (linker_stub_type == HPPA_STUB_LONG_CALL
2259 || (reloc_entry->howto->type != R_HPPA_PLABEL_32
2260 && (get_opcode (insn) == BLE
2261 || get_opcode (insn) == BE
2262 || get_opcode (insn) == BL)))
2263 reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_HPPA_STUB_CALL_17);
2264
2265 /* Now generate the code for the stub. Starting with two
2266 common instructions.
2267
2268 FIXME: Do we still need the SP adjustment?
2269 Do we still need to muck with space registers? */
2270 NEW_INSTRUCTION (stub_entry, LDSID_31_1)
2271 NEW_INSTRUCTION (stub_entry, MTSP_1_SR0)
2272
2273 if (linker_stub_type == HPPA_STUB_ARG_RELOC)
2274 {
2275 NEW_INSTRUCTION (stub_entry, ADDI_8_SP)
2276
2277 /* Examine each argument, generating code to relocate it
2278 into a different register if necessary. */
2279 for (i = ARG0; i < ARG3; i++)
2280 {
2281 switch (stub_types[i])
2282 {
2283
2284 case NO_ARG_RELOC:
2285 continue;
2286
2287 case R_TO_FR:
2288 switch (i)
2289 {
2290 case ARG0:
2291 NEW_INSTRUCTION (stub_entry, STWS_ARG0_M8SP)
2292 NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG0)
2293 break;
2294 case ARG1:
2295 NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP)
2296 NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG1)
2297 break;
2298 case ARG2:
2299 NEW_INSTRUCTION (stub_entry, STWS_ARG2_M8SP)
2300 NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG2)
2301 break;
2302 case ARG3:
2303 NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP)
2304 NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG3)
2305 break;
2306 }
2307 continue;
2308
2309 case R01_TO_FR:
2310 switch (i)
2311 {
2312 case ARG0:
2313 NEW_INSTRUCTION (stub_entry, STWS_ARG0_M4SP)
2314 NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP)
2315 NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG1)
2316 break;
2317 default:
2318 abort ();
2319 break;
2320 }
2321 continue;
2322
2323 case R23_TO_FR:
2324 switch (i)
2325 {
2326 case ARG2:
2327 NEW_INSTRUCTION (stub_entry, STWS_ARG2_M4SP)
2328 NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP)
2329 NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG3)
2330 break;
2331 default:
2332 abort ();
2333 break;
2334 }
2335 continue;
2336
2337 case FR_TO_R:
2338 switch (i)
2339 {
2340 case ARG0:
2341 NEW_INSTRUCTION (stub_entry, FSTWS_FARG0_M8SP)
2342 NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0)
2343 break;
2344 case ARG1:
2345 NEW_INSTRUCTION (stub_entry, FSTWS_FARG1_M8SP)
2346 NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG1)
2347 break;
2348 case ARG2:
2349 NEW_INSTRUCTION (stub_entry, FSTWS_FARG2_M8SP)
2350 NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2)
2351 break;
2352 case ARG3:
2353 NEW_INSTRUCTION (stub_entry, FSTWS_FARG3_M8SP)
2354 NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG3)
2355 break;
2356 }
2357 continue;
2358
2359 case FR_TO_R01:
2360 switch (i)
2361 {
2362 case ARG0:
2363 NEW_INSTRUCTION (stub_entry, FSTDS_FARG1_M8SP)
2364 NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0)
2365 NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG1)
2366 break;
2367 default:
2368 abort ();
2369 break;
2370 }
2371 continue;
2372
2373 case FR_TO_R23:
2374 switch (i)
2375 {
2376 case ARG2:
2377 NEW_INSTRUCTION (stub_entry, FSTDS_FARG3_M8SP)
2378 NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2)
2379 NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG3)
2380 break;
2381 default:
2382 abort ();
2383 break;
2384 }
2385 continue;
2386
2387 default:
2388 abort ();
2389 break;
2390 }
2391 }
2392
2393 /* Put the stack pointer back. FIXME: Is this still necessary? */
2394 NEW_INSTRUCTION (stub_entry, ADDI_M8_SP_SP)
2395 }
2396
2397 /* Common code again. Return pointer adjustment and the like. */
2398 if (!dyncall)
2399 {
2400 /* This isn't dyncall. */
2401 if (!milli)
2402 {
2403 /* It's not a millicode call, so get the correct return
2404 value into %r2 (aka RP). */
2405 if (rtn_adjust)
2406 NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP)
2407 else
2408 NEW_INSTRUCTION (stub_entry, COPY_31_2)
2409 }
2410 else
2411 {
2412 /* It is a millicode call, so get the correct return
2413 value into %r1?!?. FIXME: Shouldn't this be
2414 %r31? Yes, and a little re-arrangement of the
2415 code below would make that possible. */
2416 if (rtn_adjust)
2417 NEW_INSTRUCTION (stub_entry, ADDI_M4_31_1)
2418 else
2419 NEW_INSTRUCTION (stub_entry, COPY_31_1)
2420 }
2421 }
2422 else
2423 {
2424 /* This is dyncall, so the code is a little different as the
2425 return pointer is already in %r2 (aka RP). */
2426 if (rtn_adjust)
2427 NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP)
2428 }
2429
2430 /* Save the return address. */
2431 if (linker_stub_type == HPPA_STUB_ARG_RELOC)
2432 NEW_INSTRUCTION (stub_entry, STW_RP_M8SP)
2433
2434 /* Long branch to the target function. */
2435 NEW_INSTRUCTION (stub_entry, LDIL_XXX_31)
2436 hppa_elf_stub_reloc (stub_entry->stub_desc,
2437 abfd, orig_sym,
2438 CURRENT_STUB_OFFSET (stub_entry),
2439 R_HPPA_L21);
2440 NEW_INSTRUCTION (stub_entry, BLE_XXX_0_31)
2441 hppa_elf_stub_reloc (stub_entry->stub_desc,
2442 abfd, orig_sym,
2443 CURRENT_STUB_OFFSET (stub_entry),
2444 R_HPPA_ABS_CALL_R17);
2445
2446 if (linker_stub_type == HPPA_STUB_ARG_RELOC)
2447 {
2448 /* In delay slot of long-call, copy %r31 into %r2 so that
2449 the callee can return in the normal fashion. */
2450 NEW_INSTRUCTION (stub_entry, COPY_31_2)
2451
2452 /* Restore the return address. */
2453 NEW_INSTRUCTION (stub_entry, LDW_M8SP_RP)
2454
2455 /* Generate the code to move the return value around. */
2456 switch (stub_types[RETVAL])
2457 {
2458 case NO_ARG_RELOC:
2459 break;
2460
2461 case R_TO_FR:
2462 NEW_INSTRUCTION (stub_entry, STWS_RET0_M8SP)
2463 NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FRET0)
2464 break;
2465
2466 case FR_TO_R:
2467 NEW_INSTRUCTION (stub_entry, FSTWS_FRET0_M8SP)
2468 NEW_INSTRUCTION (stub_entry, LDWS_M4SP_RET0)
2469 break;
2470
2471 default:
2472 abort ();
2473 break;
2474 }
2475
2476 /* Return back to the main code stream. */
2477 NEW_INSTRUCTION (stub_entry, BV_N_0_RP)
2478 }
2479 else
2480 {
2481 if (!dyncall)
2482 {
2483 /* Get return address into %r31. Both variants may be necessary
2484 (I think) as we could be cascading into another stub. */
2485 if (!milli)
2486 NEW_INSTRUCTION (stub_entry, COPY_2_31)
2487 else
2488 NEW_INSTRUCTION (stub_entry, COPY_1_31)
2489 }
2490 else
2491 {
2492 /* Get the return address into %r31 too. Might be necessary
2493 (I think) as we could be cascading into another stub. */
2494 NEW_INSTRUCTION (stub_entry, COPY_2_31)
2495 }
2496
2497 /* No need for a return to the main stream. */
2498 }
2499 }
2500 return stub_sym;
2501 }
2502
2503 /* Return nonzero if an argument relocation will be needed to call
2504 the function (symbol in RELOC_ENTRY) assuming the caller has
2505 argument relocation bugs CALLER_AR. */
2506
2507 static int
2508 hppa_elf_arg_reloc_needed_p (abfd, reloc_entry, stub_types, caller_ar)
2509 bfd *abfd;
2510 arelent *reloc_entry;
2511 arg_reloc_type stub_types[5];
2512 symext_entryS caller_ar;
2513 {
2514 /* If the symbol is still undefined, then it's impossible to know
2515 if an argument relocation is needed. */
2516 if (reloc_entry->sym_ptr_ptr[0]
2517 && reloc_entry->sym_ptr_ptr[0]->section != &bfd_und_section)
2518 {
2519 symext_entryS callee_ar = elf32_hppa_get_sym_extn (abfd,
2520 reloc_entry->sym_ptr_ptr[0],
2521 HPPA_SXT_ARG_RELOC);
2522
2523 /* Now examine all the argument and return value location
2524 information to determine if a relocation stub will be needed. */
2525 if (caller_ar && callee_ar)
2526 {
2527 arg_location caller_loc[5];
2528 arg_location callee_loc[5];
2529
2530 /* Extract the location information for the return value
2531 and argument registers separately. */
2532 callee_loc[RETVAL] = EXTRACT_ARBITS (callee_ar, RETVAL);
2533 caller_loc[RETVAL] = EXTRACT_ARBITS (caller_ar, RETVAL);
2534 callee_loc[ARG0] = EXTRACT_ARBITS (callee_ar, ARG0);
2535 caller_loc[ARG0] = EXTRACT_ARBITS (caller_ar, ARG0);
2536 callee_loc[ARG1] = EXTRACT_ARBITS (callee_ar, ARG1);
2537 caller_loc[ARG1] = EXTRACT_ARBITS (caller_ar, ARG1);
2538 callee_loc[ARG2] = EXTRACT_ARBITS (callee_ar, ARG2);
2539 caller_loc[ARG2] = EXTRACT_ARBITS (caller_ar, ARG2);
2540 callee_loc[ARG3] = EXTRACT_ARBITS (callee_ar, ARG3);
2541 caller_loc[ARG3] = EXTRACT_ARBITS (caller_ar, ARG3);
2542
2543 /* Check some special combinations. For example, if FU
2544 appears in ARG1 or ARG3, we can move it to ARG0 or ARG2,
2545 respectively. (I guess this braindamage is correct? It'd
2546 take an hour or two of reading PA calling conventions to
2547 really know). */
2548
2549 if (caller_loc[ARG0] == AR_FU || caller_loc[ARG1] == AR_FU)
2550 {
2551 caller_loc[ARG0] = AR_DBL01;
2552 caller_loc[ARG1] = AR_NO;
2553 }
2554 if (caller_loc[ARG2] == AR_FU || caller_loc[ARG3] == AR_FU)
2555 {
2556 caller_loc[ARG2] = AR_DBL23;
2557 caller_loc[ARG3] = AR_NO;
2558 }
2559 if (callee_loc[ARG0] == AR_FU || callee_loc[ARG1] == AR_FU)
2560 {
2561 callee_loc[ARG0] = AR_DBL01;
2562 callee_loc[ARG1] = AR_NO;
2563 }
2564 if (callee_loc[ARG2] == AR_FU || callee_loc[ARG3] == AR_FU)
2565 {
2566 callee_loc[ARG2] = AR_DBL23;
2567 callee_loc[ARG3] = AR_NO;
2568 }
2569
2570 /* Now look up potential mismatches. */
2571 stub_types[ARG0] = type_of_mismatch (caller_loc[ARG0],
2572 callee_loc[ARG0],
2573 ARGUMENTS);
2574 stub_types[ARG1] = type_of_mismatch (caller_loc[ARG1],
2575 callee_loc[ARG1],
2576 ARGUMENTS);
2577 stub_types[ARG2] = type_of_mismatch (caller_loc[ARG2],
2578 callee_loc[ARG2],
2579 ARGUMENTS);
2580 stub_types[ARG3] = type_of_mismatch (caller_loc[ARG3],
2581 callee_loc[ARG3],
2582 ARGUMENTS);
2583 stub_types[RETVAL] = type_of_mismatch (caller_loc[RETVAL],
2584 callee_loc[RETVAL],
2585 RETURN_VALUE);
2586
2587 /* If any of the arguments or return value need an argument
2588 relocation, then we will need an argument relocation stub. */
2589 if (stub_types[ARG0] != NO_ARG_RELOC
2590 || stub_types[ARG1] != NO_ARG_RELOC
2591 || stub_types[ARG2] != NO_ARG_RELOC
2592 || stub_types[ARG3] != NO_ARG_RELOC
2593 || stub_types[RETVAL] != NO_ARG_RELOC)
2594 return 1;
2595 }
2596 }
2597 return 0;
2598 }
2599
2600 /* Create the linker stub section. */
2601
2602 static void
2603 hppa_elf_create_stub_sec (abfd, output_bfd, secptr, link_info)
2604 bfd *abfd;
2605 bfd *output_bfd;
2606 asection **secptr;
2607 struct bfd_link_info *link_info;
2608 {
2609 asection *output_text_section;
2610
2611 output_text_section = bfd_get_section_by_name (output_bfd, ".text");
2612 *secptr = bfd_make_section (abfd, ".hppa_linker_stubs");
2613 bfd_set_section_flags (abfd, *secptr,
2614 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
2615 | SEC_RELOC | SEC_CODE | SEC_READONLY);
2616 (*secptr)->output_section = output_text_section->output_section;
2617 (*secptr)->output_offset = 0;
2618
2619 /* Set up the ELF section header for this new section. This
2620 is basically the same processing as elf_make_sections().
2621 elf_make_sections is static and therefore not accessable
2622 here. */
2623 {
2624 Elf_Internal_Shdr *this_hdr;
2625 this_hdr = &elf_section_data ((*secptr))->this_hdr;
2626
2627 /* Set the sizes of this section. The contents have already
2628 been set up ?!? */
2629 this_hdr->sh_addr = (*secptr)->vma;
2630 this_hdr->sh_size = (*secptr)->_raw_size;
2631
2632 /* Set appropriate flags for sections with relocations. */
2633 if ((*secptr)->flags & SEC_RELOC)
2634 {
2635 Elf_Internal_Shdr *rela_hdr;
2636 int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
2637
2638 rela_hdr = &elf_section_data ((*secptr))->rel_hdr;
2639
2640 if (use_rela_p)
2641 {
2642 rela_hdr->sh_type = SHT_RELA;
2643 rela_hdr->sh_entsize = sizeof (Elf32_External_Rela);
2644 }
2645 else
2646 {
2647 rela_hdr->sh_type = SHT_REL;
2648 rela_hdr->sh_entsize = sizeof (Elf32_External_Rel);
2649 }
2650 rela_hdr->sh_flags = 0;
2651 rela_hdr->sh_addr = 0;
2652 rela_hdr->sh_offset = 0;
2653 rela_hdr->sh_addralign = 0;
2654 rela_hdr->size = 0;
2655 }
2656
2657 if ((*secptr)->flags & SEC_ALLOC)
2658 this_hdr->sh_flags |= SHF_ALLOC;
2659
2660 if (!((*secptr)->flags & SEC_READONLY))
2661 this_hdr->sh_flags |= SHF_WRITE;
2662
2663 if ((*secptr)->flags & SEC_CODE)
2664 this_hdr->sh_flags |= SHF_EXECINSTR;
2665 }
2666
2667 bfd_set_section_alignment (abfd, *secptr, 2);
2668 }
2669
2670 /* Return nonzero if a long-call stub will be needed to call the
2671 function (symbol in RELOC_ENTRY). */
2672
2673 static int
2674 hppa_elf_long_branch_needed_p (abfd, asec, reloc_entry, symbol, insn)
2675 bfd *abfd;
2676 asection *asec;
2677 arelent *reloc_entry;
2678 asymbol *symbol;
2679 unsigned insn;
2680 {
2681 long sym_value = get_symbol_value (symbol);
2682 int fmt = reloc_entry->howto->bitsize;
2683 unsigned char op = get_opcode (insn);
2684 unsigned raddr;
2685
2686 #define too_far(val,num_bits) \
2687 ((int)(val) > (1 << (num_bits)) - 1) || ((int)(val) < (-1 << (num_bits)))
2688
2689 switch (op)
2690 {
2691 case BL:
2692 raddr =
2693 reloc_entry->address + asec->output_offset + asec->output_section->vma;
2694 /* If the symbol and raddr (relocated addr?) are too far away from
2695 each other, then a long-call stub will be needed. */
2696 if (too_far (sym_value - raddr, fmt + 1))
2697 return 1;
2698 break;
2699 }
2700 return 0;
2701 }
2702
2703 /* Search the given section and determine if linker stubs will be
2704 needed for any calls within that section.
2705
2706 Return any new stub symbols created.
2707
2708 Used out of hppaelf.em in the linker. */
2709
2710 asymbol *
2711 hppa_look_for_stubs_in_section (stub_bfd, abfd, output_bfd, asec,
2712 new_sym_cnt, link_info)
2713 bfd *stub_bfd;
2714 bfd *abfd;
2715 bfd *output_bfd;
2716 asection *asec;
2717 int *new_sym_cnt;
2718 struct bfd_link_info *link_info;
2719 {
2720 int i;
2721 arg_reloc_type stub_types[5];
2722 asymbol *new_syms = NULL;
2723 int new_cnt = 0;
2724 int new_max = 0;
2725 arelent **reloc_vector = NULL;
2726
2727 /* Relocations are in different places depending on whether this is
2728 an output section or an input section. Also, the relocations are
2729 in different forms. Sigh. Luckily, we have bfd_canonicalize_reloc()
2730 to straighten this out for us . */
2731 if (asec->reloc_count > 0)
2732 {
2733 reloc_vector
2734 = (arelent **) malloc (asec->reloc_count * (sizeof (arelent *) + 1));
2735 if (reloc_vector == NULL)
2736 {
2737 bfd_set_error (bfd_error_no_memory);
2738 goto error_return;
2739 }
2740
2741 /* Make sure the canonical symbols are hanging around in a convient
2742 location. */
2743 if (bfd_get_outsymbols (abfd) == NULL)
2744 {
2745 size_t symsize;
2746
2747 symsize = get_symtab_upper_bound (abfd);
2748 abfd->outsymbols = (asymbol **) bfd_alloc (abfd, symsize);
2749 if (!abfd->outsymbols)
2750 {
2751 bfd_set_error (bfd_error_no_memory);
2752 goto error_return;
2753 }
2754 abfd->symcount = bfd_canonicalize_symtab (abfd, abfd->outsymbols);
2755 }
2756
2757 /* Now get the relocations. */
2758 bfd_canonicalize_reloc (abfd, asec, reloc_vector,
2759 bfd_get_outsymbols (abfd));
2760
2761 /* Examine each relocation entry in this section. */
2762 for (i = 0; i < asec->reloc_count; i++)
2763 {
2764 arelent *rle = reloc_vector[i];
2765
2766 switch (rle->howto->type)
2767 {
2768 /* Any call could need argument relocation stubs, and
2769 some may need long-call stubs. */
2770 case R_HPPA_ABS_CALL_11:
2771 case R_HPPA_ABS_CALL_14:
2772 case R_HPPA_ABS_CALL_17:
2773 case R_HPPA_ABS_CALL_L21:
2774 case R_HPPA_ABS_CALL_R11:
2775 case R_HPPA_ABS_CALL_R14:
2776 case R_HPPA_ABS_CALL_R17:
2777 case R_HPPA_ABS_CALL_LS21:
2778 case R_HPPA_ABS_CALL_RS11:
2779 case R_HPPA_ABS_CALL_RS14:
2780 case R_HPPA_ABS_CALL_RS17:
2781 case R_HPPA_ABS_CALL_LD21:
2782 case R_HPPA_ABS_CALL_RD11:
2783 case R_HPPA_ABS_CALL_RD14:
2784 case R_HPPA_ABS_CALL_RD17:
2785 case R_HPPA_ABS_CALL_LR21:
2786 case R_HPPA_ABS_CALL_RR14:
2787 case R_HPPA_ABS_CALL_RR17:
2788 case R_HPPA_PCREL_CALL_11:
2789 case R_HPPA_PCREL_CALL_14:
2790 case R_HPPA_PCREL_CALL_17:
2791 case R_HPPA_PCREL_CALL_12:
2792 case R_HPPA_PCREL_CALL_L21:
2793 case R_HPPA_PCREL_CALL_R11:
2794 case R_HPPA_PCREL_CALL_R14:
2795 case R_HPPA_PCREL_CALL_R17:
2796 case R_HPPA_PCREL_CALL_LS21:
2797 case R_HPPA_PCREL_CALL_RS11:
2798 case R_HPPA_PCREL_CALL_RS14:
2799 case R_HPPA_PCREL_CALL_RS17:
2800 case R_HPPA_PCREL_CALL_LD21:
2801 case R_HPPA_PCREL_CALL_RD11:
2802 case R_HPPA_PCREL_CALL_RD14:
2803 case R_HPPA_PCREL_CALL_RD17:
2804 case R_HPPA_PCREL_CALL_LR21:
2805 case R_HPPA_PCREL_CALL_RR14:
2806 case R_HPPA_PCREL_CALL_RR17:
2807 {
2808 symext_entryS caller_ar
2809 = (symext_entryS) HPPA_R_ARG_RELOC (rle->addend);
2810 unsigned insn[2];
2811
2812 /* We'll need this for the long-call checks. */
2813 bfd_get_section_contents (abfd, asec, insn, rle->address,
2814 sizeof(insn));
2815
2816 /* See if this call needs an argument relocation stub. */
2817 if (hppa_elf_arg_reloc_needed_p (abfd, rle, stub_types,
2818 caller_ar))
2819 {
2820 /* Generate a stub and keep track of the new symbol. */
2821 asymbol *r;
2822
2823 if (new_cnt == new_max)
2824 {
2825 new_max += STUB_SYM_BUFFER_INC;
2826 new_syms = (asymbol *)
2827 realloc (new_syms, new_max * sizeof (asymbol));
2828 if (new_syms == NULL)
2829 {
2830 bfd_set_error (bfd_error_no_memory);
2831 goto error_return;
2832 }
2833 }
2834
2835 /* Build the argument relocation stub. */
2836 r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
2837 link_info, rle,
2838 stub_types, true, insn,
2839 HPPA_STUB_ARG_RELOC);
2840 new_syms[new_cnt++] = *r;
2841 }
2842
2843 /* See if this call needs a long-call stub. */
2844 if (hppa_elf_long_branch_needed_p (abfd, asec, rle,
2845 rle->sym_ptr_ptr[0],
2846 insn[0]))
2847 {
2848 /* Generate a stub and keep track of the new symbol. */
2849 asymbol *r;
2850
2851 if (new_cnt == new_max)
2852 {
2853 new_max += STUB_SYM_BUFFER_INC;
2854 new_syms = (asymbol *)
2855 realloc (new_syms, (new_max * sizeof (asymbol)));
2856 if (! new_syms)
2857 {
2858 bfd_set_error (bfd_error_no_memory);
2859 goto error_return;
2860 }
2861 }
2862
2863 /* Build the long-call stub. */
2864 r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
2865 link_info, rle,
2866 NULL, true, insn,
2867 HPPA_STUB_LONG_CALL);
2868 new_syms[new_cnt++] = *r;
2869 }
2870 }
2871 break;
2872
2873 /* PLABELs may need argument relocation stubs. */
2874 case R_HPPA_PLABEL_32:
2875 case R_HPPA_PLABEL_11:
2876 case R_HPPA_PLABEL_14:
2877 case R_HPPA_PLABEL_L21:
2878 case R_HPPA_PLABEL_R11:
2879 case R_HPPA_PLABEL_R14:
2880 {
2881 /* On a plabel relocation, assume the arguments of the
2882 caller are set up in general registers (indirect
2883 calls only use general registers.
2884 NOTE: 0x155 = ARGW0=GR,ARGW1=GR,ARGW2=GR,RETVAL=GR. */
2885 symext_entryS caller_ar = (symext_entryS) 0x155;
2886 unsigned insn[2];
2887
2888 /* Do we really need this? */
2889 bfd_get_section_contents (abfd, asec, insn, rle->address,
2890 sizeof(insn));
2891
2892 /* See if this call needs an argument relocation stub. */
2893 if (hppa_elf_arg_reloc_needed_p (abfd, rle, stub_types,
2894 caller_ar))
2895 {
2896 /* Generate a plabel stub and keep track of the
2897 new symbol. */
2898 asymbol *r;
2899 int rtn_adjust;
2900
2901 if (new_cnt == new_max)
2902 {
2903 new_max += STUB_SYM_BUFFER_INC;
2904 new_syms = (asymbol *) realloc (new_syms, new_max
2905 * sizeof (asymbol));
2906 }
2907
2908 /* Determine whether a return adjustment
2909 (see the relocation code for relocation type
2910 R_HPPA_STUB_CALL_17) is possible. Basically,
2911 determine whether we are looking at a branch or not. */
2912 if (rle->howto->type == R_HPPA_PLABEL_32)
2913 rtn_adjust = false;
2914 else
2915 {
2916 switch (get_opcode(insn[0]))
2917 {
2918 case BLE:
2919 case BE:
2920 rtn_adjust = true;
2921 break;
2922 default:
2923 rtn_adjust = false;
2924 }
2925 }
2926
2927 /* Build the argument relocation stub. */
2928 r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
2929 link_info, rle, stub_types,
2930 rtn_adjust, insn,
2931 HPPA_STUB_ARG_RELOC);
2932 new_syms[new_cnt++] = *r;
2933 }
2934 }
2935 break;
2936
2937 default:
2938 break;
2939 }
2940 }
2941 }
2942
2943 if (reloc_vector != NULL)
2944 free (reloc_vector);
2945 /* Return the new symbols and update the counters. */
2946 *new_sym_cnt = new_cnt;
2947 return new_syms;
2948
2949 error_return:
2950 if (reloc_vector != NULL)
2951 free (reloc_vector);
2952 /* FIXME: This is bogus. We should be returning NULL. But do the callers
2953 check for that? */
2954 abort ();
2955 }
2956
2957 /* Set the contents of a particular section at a particular location. */
2958
2959 static boolean
2960 hppa_elf_set_section_contents (abfd, section, location, offset, count)
2961 bfd *abfd;
2962 sec_ptr section;
2963 PTR location;
2964 file_ptr offset;
2965 bfd_size_type count;
2966 {
2967 /* Linker stubs are handled a little differently. */
2968 if (! strcmp (section->name, ".hppa_linker_stubs"))
2969 {
2970 if (linker_stubs_max_size < offset + count)
2971 {
2972 linker_stubs_max_size = offset + count + STUB_ALLOC_INCR;
2973 linker_stubs = (char *)realloc (linker_stubs, linker_stubs_max_size);
2974 if (! linker_stubs)
2975 abort ();
2976 }
2977
2978 if (offset + count > linker_stubs_size)
2979 linker_stubs_size = offset + count;
2980
2981 /* Set the contents. */
2982 memcpy(linker_stubs + offset, location, count);
2983 return (true);
2984 }
2985 else
2986 /* For everything but the linker stub section, use the generic
2987 code. */
2988 return bfd_elf32_set_section_contents (abfd, section, location,
2989 offset, count);
2990 }
2991
2992 /* Get the contents of the given section.
2993
2994 This is special for PA ELF because some sections (such as linker stubs)
2995 may reside in memory rather than on disk, or in the case of the symbol
2996 extension section, the contents may need to be generated from other
2997 information contained in the BFD. */
2998
2999 boolean
3000 hppa_elf_get_section_contents (abfd, section, location, offset, count)
3001 bfd *abfd;
3002 sec_ptr section;
3003 PTR location;
3004 file_ptr offset;
3005 bfd_size_type count;
3006 {
3007 /* If this is the linker stub section, then its contents are contained
3008 in memory rather than on disk. FIXME. Is that always right? What
3009 about the case where a final executable is read in and a user tries
3010 to get the contents of this section? In that case the contents would
3011 be on disk like everything else. */
3012 if (strcmp (section->name, ".hppa_linker_stubs") == 0)
3013 {
3014 elf32_hppa_stub_description *stub_desc = find_stubs (abfd, section);
3015
3016 if (count == 0)
3017 return true;
3018
3019 /* Sanity check our arguments. */
3020 if ((bfd_size_type) (offset + count) > section->_raw_size
3021 || (bfd_size_type) (offset + count) > stub_desc->real_size)
3022 return (false);
3023
3024 memcpy (location, stub_desc->stub_contents + offset, count);
3025 return (true);
3026 }
3027
3028 /* The symbol extension section also needs special handling. Its
3029 contents might be on the disk, in memory, or still need to
3030 be generated. */
3031 else if (strcmp (section->name, ".hppa_symextn") == 0)
3032 {
3033 /* If there are no output sections, then read the contents of the
3034 symbol extension section from disk. */
3035 if (section->output_section == NULL
3036 && abfd->direction == read_direction)
3037 {
3038 return bfd_generic_get_section_contents (abfd, section, location,
3039 offset, count);
3040 }
3041
3042 /* If this is the first time through, and there are output sections,
3043 then build the symbol extension section based on other information
3044 contained in the BFD. */
3045 else if (! symext_chain_built)
3046 {
3047 int i;
3048 int *symtab_map =
3049 (int *) elf_sym_extra (section->output_section->owner);
3050
3051 for (i = 0; i < section->output_section->owner->symcount; i++)
3052 {
3053 elf_hppa_tc_symbol (section->output_section->owner,
3054 ((elf_symbol_type *)
3055 section->output_section->owner->outsymbols[i]),
3056 symtab_map[i], &symext_rootP, &symext_lastP);
3057 }
3058 symext_chain_built++;
3059 elf_hppa_tc_make_sections (section->output_section->owner,
3060 symext_rootP);
3061 }
3062
3063 /* At this point we know that the symbol extension section has been
3064 built. We just need to copy it into the user's buffer. */
3065 if (count == 0)
3066 return true;
3067
3068 /* Sanity check our arguments. */
3069 if ((bfd_size_type) (offset + count) > section->_raw_size
3070 || (bfd_size_type) (offset + count) > symextn_contents_real_size)
3071 return (false);
3072
3073 memcpy (location,
3074 (char *)symextn_contents + section->output_offset + offset,
3075 count);
3076 return (true);
3077 }
3078 else
3079 /* It's not the symbol extension or linker stub sections, use
3080 the generic routines. */
3081 return bfd_generic_get_section_contents (abfd, section, location,
3082 offset, count);
3083 }
3084
3085 /* Translate from an elf into field into a howto relocation pointer. */
3086
3087 static void
3088 elf_info_to_howto (abfd, cache_ptr, dst)
3089 bfd *abfd;
3090 arelent *cache_ptr;
3091 Elf32_Internal_Rela *dst;
3092 {
3093 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_HPPA_UNIMPLEMENTED);
3094 cache_ptr->howto = &elf_hppa_howto_table[ELF32_R_TYPE (dst->r_info)];
3095 }
3096
3097 /* Do PA ELF specific processing for symbols. Needed to find the
3098 value of $global$. */
3099
3100 static void
3101 elf32_hppa_backend_symbol_processing (abfd, sym)
3102 bfd *abfd;
3103 asymbol *sym;
3104 {
3105 /* Is this a definition of $global$? If so, keep it because it will be
3106 needed if any relocations are performed. */
3107 if (!strcmp (sym->name, "$global$")
3108 && sym->section != &bfd_und_section)
3109 {
3110 global_symbol = sym;
3111 }
3112 }
3113
3114 /* Do some PA ELF specific work after reading in the symbol table.
3115 In particular attach the argument relocation from the
3116 symbol extension section to the appropriate symbols. */
3117 static boolean
3118 elf32_hppa_backend_symbol_table_processing (abfd, esyms,symcnt)
3119 bfd *abfd;
3120 elf_symbol_type *esyms;
3121 int symcnt;
3122 {
3123 Elf32_Internal_Shdr *symextn_hdr =
3124 bfd_elf_find_section (abfd, SYMEXTN_SECTION_NAME);
3125 int i, current_sym_idx = 0;
3126
3127 /* If no symbol extension existed, then all symbol extension information
3128 is assumed to be zero. */
3129 if (symextn_hdr == NULL)
3130 {
3131 for (i = 0; i < symcnt; i++)
3132 esyms[i].tc_data.hppa_arg_reloc = 0;
3133 return (true);
3134 }
3135
3136 /* Allocate a buffer of the appropriate size for the symextn section. */
3137 symextn_hdr->contents = bfd_zalloc(abfd,symextn_hdr->sh_size);
3138 if (!symextn_hdr->contents)
3139 {
3140 bfd_set_error (bfd_error_no_memory);
3141 return false;
3142 }
3143 symextn_hdr->size = symextn_hdr->sh_size;
3144
3145 /* Read in the symextn section. */
3146 if (bfd_seek (abfd, symextn_hdr->sh_offset, SEEK_SET) == -1)
3147 return false;
3148 if (bfd_read ((PTR) symextn_hdr->contents, 1, symextn_hdr->size, abfd)
3149 != symextn_hdr->size)
3150 return false;
3151
3152 /* Parse entries in the symbol extension section, updating the symtab
3153 entries as we go */
3154 for (i = 0; i < symextn_hdr->size / sizeof(symext_entryS); i++)
3155 {
3156 symext_entryS *seP = ((symext_entryS *)symextn_hdr->contents) + i;
3157 int se_value = ELF32_HPPA_SX_VAL (*seP);
3158 int se_type = ELF32_HPPA_SX_TYPE (*seP);
3159
3160 switch (se_type)
3161 {
3162 case HPPA_SXT_NULL:
3163 break;
3164
3165 case HPPA_SXT_SYMNDX:
3166 if (se_value >= symcnt)
3167 {
3168 bfd_set_error (bfd_error_bad_value);
3169 return (false);
3170 }
3171 current_sym_idx = se_value - 1;
3172 break;
3173
3174 case HPPA_SXT_ARG_RELOC:
3175 esyms[current_sym_idx].tc_data.hppa_arg_reloc = se_value;
3176 break;
3177
3178 default:
3179 bfd_set_error (bfd_error_bad_value);
3180 return (false);
3181 }
3182 }
3183 return (true);
3184 }
3185
3186 /* Perform on PA ELF specific processing once a section has been
3187 read in. In particular keep the symbol indexes correct for
3188 the symbol extension information. */
3189
3190 static boolean
3191 elf32_hppa_backend_section_processing (abfd, secthdr)
3192 bfd *abfd;
3193 Elf32_Internal_Shdr *secthdr;
3194 {
3195 int i, j, k;
3196
3197 if (secthdr->sh_type == SHT_HPPA_SYMEXTN)
3198 {
3199 for (i = 0; i < secthdr->size / sizeof (symext_entryS); i++)
3200 {
3201 symext_entryS *seP = ((symext_entryS *)secthdr->contents) + i;
3202 int se_value = ELF32_HPPA_SX_VAL (*seP);
3203 int se_type = ELF32_HPPA_SX_TYPE (*seP);
3204
3205 switch (se_type)
3206 {
3207 case HPPA_SXT_NULL:
3208 break;
3209
3210 case HPPA_SXT_SYMNDX:
3211 for (j = 0; j < abfd->symcount; j++)
3212 {
3213 /* Locate the map entry for this symbol and modify the
3214 symbol extension section symbol index entry to reflect
3215 the new symbol table index. */
3216 for (k = 0; k < elf32_hppa_symextn_map_size; k++)
3217 {
3218 if (elf32_hppa_symextn_map[k].old_index == se_value
3219 && elf32_hppa_symextn_map[k].bfd
3220 == abfd->outsymbols[j]->the_bfd
3221 && elf32_hppa_symextn_map[k].sym
3222 == abfd->outsymbols[j])
3223 {
3224 bfd_put_32(abfd,
3225 ELF32_HPPA_SX_WORD (HPPA_SXT_SYMNDX, j),
3226 (char *)seP);
3227 }
3228 }
3229 }
3230 break;
3231
3232 case HPPA_SXT_ARG_RELOC:
3233 break;
3234
3235 default:
3236 bfd_set_error (bfd_error_bad_value);
3237 return (false);
3238 }
3239 }
3240 }
3241 return true;
3242 }
3243
3244 /* What does this really do? Just determine if there is an appropriate
3245 mapping from ELF section headers to backend sections? More symbol
3246 extension braindamage. */
3247
3248 static boolean
3249 elf32_hppa_backend_section_from_shdr (abfd, hdr, name)
3250 bfd *abfd;
3251 Elf32_Internal_Shdr *hdr;
3252 char *name;
3253 {
3254 asection *newsect;
3255
3256 if (hdr->sh_type == SHT_HPPA_SYMEXTN)
3257 {
3258 BFD_ASSERT (strcmp (name, ".hppa_symextn") == 0);
3259
3260 /* Bits that get saved. This one is real. */
3261 if (!hdr->rawdata)
3262 {
3263 newsect = bfd_make_section (abfd, name);
3264 if (newsect != NULL)
3265 {
3266 newsect->vma = hdr->sh_addr;
3267 newsect->_raw_size = hdr->sh_size;
3268 newsect->filepos = hdr->sh_offset;
3269 newsect->flags |= SEC_HAS_CONTENTS;
3270 newsect->alignment_power = hdr->sh_addralign;
3271
3272 if (hdr->sh_flags & SHF_ALLOC)
3273 {
3274 newsect->flags |= SEC_ALLOC;
3275 newsect->flags |= SEC_LOAD;
3276 }
3277
3278 if (!(hdr->sh_flags & SHF_WRITE))
3279 newsect->flags |= SEC_READONLY;
3280
3281 if (hdr->sh_flags & SHF_EXECINSTR)
3282 newsect->flags |= SEC_CODE;
3283 else
3284 newsect->flags |= SEC_DATA;
3285
3286 hdr->rawdata = (void *) newsect;
3287 }
3288 }
3289 return true;
3290 }
3291 return false;
3292 }
3293
3294 /* Return true if the given section is a fake section. */
3295
3296 static boolean
3297 elf32_hppa_backend_fake_sections (abfd, secthdr, asect)
3298 bfd *abfd;
3299 Elf_Internal_Shdr *secthdr;
3300 asection *asect;
3301 {
3302
3303 if (strcmp(asect->name, ".hppa_symextn") == 0)
3304 {
3305 secthdr->sh_type = SHT_HPPA_SYMEXTN;
3306 secthdr->sh_flags = 0;
3307 secthdr->sh_info = elf_section_data(asect)->rel_hdr.sh_link;
3308 secthdr->sh_link = elf_onesymtab(abfd);
3309 return true;
3310 }
3311
3312 if (!strcmp (asect->name, ".hppa_unwind"))
3313 {
3314 secthdr->sh_type = SHT_PROGBITS;
3315 /* Unwind descriptors are not part of the program memory image. */
3316 secthdr->sh_flags = 0;
3317 secthdr->sh_info = 0;
3318 secthdr->sh_link = 0;
3319 secthdr->sh_entsize = 16;
3320 return true;
3321 }
3322
3323 /* @@ Should this be CPU specific?? KR */
3324 if (!strcmp (asect->name, ".stabstr"))
3325 {
3326 secthdr->sh_type = SHT_STRTAB;
3327 secthdr->sh_flags = 0;
3328 secthdr->sh_info = 0;
3329 secthdr->sh_link = 0;
3330 secthdr->sh_entsize = 0;
3331 return true;
3332 }
3333
3334 return false;
3335 }
3336
3337 /* Return true if there is a mapping from bfd section into a
3338 backend section. */
3339
3340 static boolean
3341 elf32_hppa_backend_section_from_bfd_section (abfd, hdr, asect, ignored)
3342 bfd *abfd;
3343 Elf32_Internal_Shdr *hdr;
3344 asection *asect;
3345 int *ignored;
3346 {
3347 if (hdr->sh_type == SHT_HPPA_SYMEXTN)
3348 {
3349 if (hdr->rawdata)
3350 {
3351 if (((struct sec *) (hdr->rawdata)) == asect)
3352 {
3353 BFD_ASSERT (strcmp (asect->name, ".hppa_symextn") == 0);
3354 return true;
3355 }
3356 }
3357 }
3358 else if (hdr->sh_type == SHT_STRTAB)
3359 {
3360 if (hdr->rawdata)
3361 {
3362 if (((struct sec *) (hdr->rawdata)) == asect)
3363 {
3364 BFD_ASSERT (strcmp (asect->name, ".stabstr") == 0);
3365 return true;
3366 }
3367 }
3368 }
3369
3370 return false;
3371 }
3372
3373 #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
3374 #define elf_backend_section_from_bfd_section elf32_hppa_backend_section_from_bfd_section
3375
3376 #define elf_backend_symbol_processing elf32_hppa_backend_symbol_processing
3377 #define elf_backend_symbol_table_processing elf32_hppa_backend_symbol_table_processing
3378
3379 #define bfd_generic_get_section_contents hppa_elf_get_section_contents
3380 #define bfd_elf32_set_section_contents hppa_elf_set_section_contents
3381 #define bfd_elf32_bfd_is_local_label hppa_elf_is_local_label
3382
3383 #define elf_backend_section_processing elf32_hppa_backend_section_processing
3384
3385 #define elf_backend_section_from_shdr elf32_hppa_backend_section_from_shdr
3386 #define elf_backend_fake_sections elf32_hppa_backend_fake_sections
3387
3388 #define TARGET_BIG_SYM bfd_elf32_hppa_vec
3389 #define TARGET_BIG_NAME "elf32-hppa"
3390 #define ELF_ARCH bfd_arch_hppa
3391 #define ELF_MACHINE_CODE EM_HPPA
3392 #define ELF_MAXPAGESIZE 0x1000
3393
3394 #include "elf32-target.h"
GDB Binutils - Deliverables
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