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847b055c | 1 | /* Machine-dependent ELF dynamic relocation inline functions. S390 Version. |
d4697bc9 | 2 | Copyright (C) 2000-2014 Free Software Foundation, Inc. |
847b055c AJ |
3 | Contributed by Carl Pederson & Martin Schwidefsky. |
4 | This file is part of the GNU C Library. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
847b055c AJ |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
847b055c | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
847b055c AJ |
19 | |
20 | #ifndef dl_machine_h | |
21 | #define dl_machine_h | |
22 | ||
847b055c AJ |
23 | #define ELF_MACHINE_NAME "s390" |
24 | ||
25 | #include <sys/param.h> | |
26 | #include <string.h> | |
27 | #include <link.h> | |
7760ccce | 28 | #include <sysdeps/s390/dl-procinfo.h> |
08f43f9b | 29 | #include <dl-irel.h> |
847b055c | 30 | |
9672b937 AJ |
31 | /* This is an older, now obsolete value. */ |
32 | #define EM_S390_OLD 0xA390 | |
847b055c | 33 | |
ceb579a3 | 34 | /* Return nonzero iff ELF header is compatible with the running host. */ |
847b055c | 35 | static inline int |
ceb579a3 | 36 | elf_machine_matches_host (const Elf32_Ehdr *ehdr) |
847b055c | 37 | { |
7760ccce AK |
38 | /* Check if the kernel provides the high gpr facility if needed by |
39 | the binary. */ | |
40 | if ((ehdr->e_flags & EF_S390_HIGH_GPRS) | |
41 | && !(GLRO (dl_hwcap) & HWCAP_S390_HIGH_GPRS)) | |
42 | return 0; | |
43 | ||
ffeac417 | 44 | return (ehdr->e_machine == EM_S390 || ehdr->e_machine == EM_S390_OLD) |
d063d164 | 45 | && ehdr->e_ident[EI_CLASS] == ELFCLASS32; |
847b055c AJ |
46 | } |
47 | ||
48 | ||
49 | /* Return the link-time address of _DYNAMIC. Conveniently, this is the | |
50 | first element of the GOT. This must be inlined in a function which | |
51 | uses global data. */ | |
52 | ||
53 | static inline Elf32_Addr | |
54 | elf_machine_dynamic (void) | |
55 | { | |
56 | register Elf32_Addr *got; | |
57 | ||
58 | asm( " bras %0,2f\n" | |
59 | "1: .long _GLOBAL_OFFSET_TABLE_-1b\n" | |
60 | "2: al %0,0(%0)" | |
61 | : "=&a" (got) : : "0" ); | |
62 | ||
63 | return *got; | |
64 | } | |
65 | ||
66 | ||
67 | /* Return the run-time load address of the shared object. */ | |
68 | static inline Elf32_Addr | |
69 | elf_machine_load_address (void) | |
70 | { | |
71 | Elf32_Addr addr; | |
72 | ||
73 | asm( " bras 1,2f\n" | |
74 | "1: .long _GLOBAL_OFFSET_TABLE_ - 1b\n" | |
1ea166df | 75 | " .long (_dl_start - 1b - 0x80000000) & 0x00000000ffffffff\n" |
847b055c AJ |
76 | "2: l %0,4(1)\n" |
77 | " ar %0,1\n" | |
78 | " al 1,0(1)\n" | |
2581b98e | 79 | " sl %0,_dl_start@GOT(1)" |
847b055c AJ |
80 | : "=&d" (addr) : : "1" ); |
81 | return addr; | |
82 | } | |
83 | ||
84 | /* Set up the loaded object described by L so its unrelocated PLT | |
85 | entries will jump to the on-demand fixup code in dl-runtime.c. */ | |
86 | ||
87 | static inline int __attribute__ ((unused)) | |
88 | elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) | |
89 | { | |
90 | extern void _dl_runtime_resolve (Elf32_Word); | |
91 | extern void _dl_runtime_profile (Elf32_Word); | |
92 | ||
93 | if (l->l_info[DT_JMPREL] && lazy) | |
94 | { | |
95 | /* The GOT entries for functions in the PLT have not yet been filled | |
96 | in. Their initial contents will arrange when called to push an | |
97 | offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1], | |
98 | and then jump to _GLOBAL_OFFSET_TABLE[2]. */ | |
99 | Elf32_Addr *got; | |
100 | got = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]); | |
32e6df36 UD |
101 | /* If a library is prelinked but we have to relocate anyway, |
102 | we have to be able to undo the prelinking of .got.plt. | |
103 | The prelinker saved us here address of .plt + 0x2c. */ | |
104 | if (got[1]) | |
105 | { | |
106 | l->l_mach.plt = got[1] + l->l_addr; | |
107 | l->l_mach.gotplt = (Elf32_Addr) &got[3]; | |
108 | } | |
847b055c AJ |
109 | got[1] = (Elf32_Addr) l; /* Identify this shared object. */ |
110 | ||
111 | /* The got[2] entry contains the address of a function which gets | |
112 | called to get the address of a so far unresolved function and | |
113 | jump to it. The profiling extension of the dynamic linker allows | |
114 | to intercept the calls to collect information. In this case we | |
115 | don't store the address in the GOT so that all future calls also | |
116 | end in this function. */ | |
a1ffb40e | 117 | if (__glibc_unlikely (profile)) |
847b055c AJ |
118 | { |
119 | got[2] = (Elf32_Addr) &_dl_runtime_profile; | |
120 | ||
bb38d32c UD |
121 | if (GLRO(dl_profile) != NULL |
122 | && _dl_name_match_p (GLRO(dl_profile), l)) | |
847b055c AJ |
123 | /* This is the object we are looking for. Say that we really |
124 | want profiling and the timers are started. */ | |
5688da55 | 125 | GL(dl_profile_map) = l; |
847b055c AJ |
126 | } |
127 | else | |
128 | /* This function will get called to fix up the GOT entry indicated by | |
129 | the offset on the stack, and then jump to the resolved address. */ | |
130 | got[2] = (Elf32_Addr) &_dl_runtime_resolve; | |
131 | } | |
132 | ||
133 | return lazy; | |
134 | } | |
135 | ||
847b055c AJ |
136 | /* Mask identifying addresses reserved for the user program, |
137 | where the dynamic linker should not map anything. */ | |
138 | #define ELF_MACHINE_USER_ADDRESS_MASK 0xf8000000UL | |
139 | ||
140 | /* Initial entry point code for the dynamic linker. | |
141 | The C function `_dl_start' is the real entry point; | |
142 | its return value is the user program's entry point. */ | |
143 | ||
144 | #define RTLD_START asm ("\n\ | |
145 | .text\n\ | |
146 | .align 4\n\ | |
147 | .globl _start\n\ | |
148 | .globl _dl_start_user\n\ | |
149 | _start:\n\ | |
150 | basr %r13,0\n\ | |
20ed0d26 | 151 | 0: ahi %r13,.Llit-0b\n\ |
847b055c AJ |
152 | lr %r2,%r15\n\ |
153 | # Alloc stack frame\n\ | |
154 | ahi %r15,-96\n\ | |
155 | # Set the back chain to zero\n\ | |
156 | xc 0(4,%r15),0(%r15)\n\ | |
157 | # Call _dl_start with %r2 pointing to arg on stack\n\ | |
158 | l %r14,.Ladr1-.Llit(%r13)\n\ | |
159 | bas %r14,0(%r14,%r13) # call _dl_start\n\ | |
160 | _dl_start_user:\n\ | |
161 | # Save the user entry point address in %r8.\n\ | |
162 | lr %r8,%r2\n\ | |
163 | # Point %r12 at the GOT.\n\ | |
164 | l %r12,.Ladr0-.Llit(%r13)\n\ | |
165 | ar %r12,%r13\n\ | |
847b055c AJ |
166 | # See if we were run as a command with the executable file\n\ |
167 | # name as an extra leading argument.\n\ | |
2581b98e | 168 | l %r1,_dl_skip_args@GOT(%r12)\n\ |
533bb7c2 SP |
169 | l %r1,0(%r1) # load _dl_skip_args\n\ |
170 | ltr %r1,%r1\n\ | |
20ed0d26 | 171 | je 4f # Skip the arg adjustment if there were none.\n\ |
847b055c AJ |
172 | # Get the original argument count.\n\ |
173 | l %r0,96(%r15)\n\ | |
174 | # Subtract _dl_skip_args from it.\n\ | |
175 | sr %r0,%r1\n\ | |
847b055c AJ |
176 | # Store back the modified argument count.\n\ |
177 | st %r0,96(%r15)\n\ | |
533bb7c2 SP |
178 | # Copy argv and envp forward to account for skipped argv entries.\n\ |
179 | # We skipped at least one argument or we would not get here.\n\ | |
180 | la %r6,100(%r15) # Destination pointer i.e. &argv[0]\n\ | |
181 | lr %r5,%r6\n\ | |
182 | lr %r0,%r1\n\ | |
183 | sll %r0,2\n # Number of skipped bytes.\n\ | |
184 | ar %r5,%r0 # Source pointer = Dest + Skipped args.\n\ | |
185 | # argv copy loop:\n\ | |
20ed0d26 | 186 | 1: l %r7,0(%r5) # Load a word from the source.\n\ |
533bb7c2 SP |
187 | st %r7,0(%r6) # Store the word in the destination.\n\ |
188 | ahi %r5,4\n\ | |
189 | ahi %r6,4\n\ | |
190 | ltr %r7,%r7\n\ | |
20ed0d26 | 191 | jne 1b # Stop after copying the NULL.\n\ |
533bb7c2 | 192 | # envp copy loop:\n\ |
20ed0d26 | 193 | 2: l %r7,0(%r5) # Load a word from the source.\n\ |
533bb7c2 SP |
194 | st %r7,0(%r6) # Store the word in the destination.\n\ |
195 | ahi %r5,4\n\ | |
196 | ahi %r6,4\n\ | |
197 | ltr %r7,%r7\n\ | |
20ed0d26 | 198 | jne 2b # Stop after copying the NULL.\n\ |
533bb7c2 SP |
199 | # Now we have to zero out the envp entries after NULL to allow\n\ |
200 | # start.S to properly find auxv by skipping zeroes.\n\ | |
201 | # zero out loop:\n\ | |
202 | lhi %r7,0\n\ | |
20ed0d26 | 203 | 3: st %r7,0(%r6) # Store zero.\n\ |
533bb7c2 SP |
204 | ahi %r6,4 # Advance dest pointer.\n\ |
205 | ahi %r1,-1 # Subtract one from the word count.\n\ | |
206 | ltr %r1,%r1\n\ | |
20ed0d26 | 207 | jne 3b # Keep copying if the word count is non-zero.\n\ |
533bb7c2 SP |
208 | # Adjust _dl_argv\n\ |
209 | la %r6,100(%r15)\n\ | |
210 | l %r1,_dl_argv@GOT(%r12)\n\ | |
211 | st %r6,0(%r1)\n\ | |
847b055c AJ |
212 | # The special initializer gets called with the stack just\n\ |
213 | # as the application's entry point will see it; it can\n\ | |
214 | # switch stacks if it moves these contents over.\n\ | |
215 | " RTLD_START_SPECIAL_INIT "\n\ | |
216 | # Call the function to run the initializers.\n\ | |
217 | # Load the parameters:\n\ | |
218 | # (%r2, %r3, %r4, %r5) = (_dl_loaded, argc, argv, envp)\n\ | |
20ed0d26 | 219 | 4: l %r2,_rtld_local@GOT(%r12)\n\ |
847b055c AJ |
220 | l %r2,0(%r2)\n\ |
221 | l %r3,96(%r15)\n\ | |
222 | la %r4,100(%r15)\n\ | |
223 | lr %r5,%r3\n\ | |
224 | sll %r5,2\n\ | |
225 | la %r5,104(%r5,%r15)\n\ | |
226 | l %r1,.Ladr4-.Llit(%r13)\n\ | |
227 | bas %r14,0(%r1,%r13)\n\ | |
228 | # Pass our finalizer function to the user in %r14, as per ELF ABI.\n\ | |
229 | l %r14,_dl_fini@GOT(%r12)\n\ | |
230 | # Free stack frame\n\ | |
231 | ahi %r15,96\n\ | |
232 | # Jump to the user's entry point (saved in %r8).\n\ | |
233 | br %r8\n\ | |
234 | .Llit:\n\ | |
235 | .Ladr0: .long _GLOBAL_OFFSET_TABLE_-.Llit\n\ | |
236 | .Ladr1: .long _dl_start-.Llit\n\ | |
c5684fdb | 237 | .Ladr4: .long _dl_init@PLT-.Llit\n\ |
847b055c AJ |
238 | "); |
239 | ||
240 | #ifndef RTLD_START_SPECIAL_INIT | |
241 | #define RTLD_START_SPECIAL_INIT /* nothing */ | |
242 | #endif | |
243 | ||
e6ebd2e4 UD |
244 | /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or |
245 | TLS variable, so undefined references should not be allowed to | |
246 | define the value. | |
cf5a372e UD |
247 | ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one |
248 | of the main executable's symbols, as for a COPY reloc. */ | |
11bf311e | 249 | #define elf_machine_type_class(type) \ |
e6ebd2e4 UD |
250 | ((((type) == R_390_JMP_SLOT || (type) == R_390_TLS_DTPMOD \ |
251 | || (type) == R_390_TLS_DTPOFF || (type) == R_390_TLS_TPOFF) \ | |
252 | * ELF_RTYPE_CLASS_PLT) \ | |
253 | | (((type) == R_390_COPY) * ELF_RTYPE_CLASS_COPY)) | |
847b055c AJ |
254 | |
255 | /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ | |
256 | #define ELF_MACHINE_JMP_SLOT R_390_JMP_SLOT | |
257 | ||
258 | /* The S390 never uses Elf32_Rel relocations. */ | |
259 | #define ELF_MACHINE_NO_REL 1 | |
4cf5b6d0 | 260 | #define ELF_MACHINE_NO_RELA 0 |
847b055c | 261 | |
847b055c AJ |
262 | /* We define an initialization functions. This is called very early in |
263 | _dl_sysdep_start. */ | |
264 | #define DL_PLATFORM_INIT dl_platform_init () | |
265 | ||
847b055c AJ |
266 | static inline void __attribute__ ((unused)) |
267 | dl_platform_init (void) | |
268 | { | |
afdca0f2 | 269 | if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0') |
847b055c | 270 | /* Avoid an empty string which would disturb us. */ |
afdca0f2 | 271 | GLRO(dl_platform) = NULL; |
847b055c AJ |
272 | } |
273 | ||
274 | static inline Elf32_Addr | |
275 | elf_machine_fixup_plt (struct link_map *map, lookup_t t, | |
276 | const Elf32_Rela *reloc, | |
277 | Elf32_Addr *reloc_addr, Elf32_Addr value) | |
278 | { | |
279 | return *reloc_addr = value; | |
280 | } | |
281 | ||
282 | /* Return the final value of a plt relocation. */ | |
283 | static inline Elf32_Addr | |
284 | elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc, | |
285 | Elf32_Addr value) | |
286 | { | |
287 | return value; | |
288 | } | |
289 | ||
bb38d32c UD |
290 | /* Names of the architecture-specific auditing callback functions. */ |
291 | #define ARCH_LA_PLTENTER s390_32_gnu_pltenter | |
292 | #define ARCH_LA_PLTEXIT s390_32_gnu_pltexit | |
293 | ||
847b055c AJ |
294 | #endif /* !dl_machine_h */ |
295 | ||
296 | ||
bb38d32c | 297 | #ifdef RESOLVE_MAP |
847b055c AJ |
298 | |
299 | /* Perform the relocation specified by RELOC and SYM (which is fully resolved). | |
300 | MAP is the object containing the reloc. */ | |
301 | ||
bb38d32c UD |
302 | auto inline void |
303 | __attribute__ ((always_inline)) | |
847b055c | 304 | elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, |
87d254a7 | 305 | const Elf32_Sym *sym, const struct r_found_version *version, |
3a62d00d | 306 | void *const reloc_addr_arg, int skip_ifunc) |
847b055c | 307 | { |
87d254a7 | 308 | Elf32_Addr *const reloc_addr = reloc_addr_arg; |
1721af3f UD |
309 | const unsigned int r_type = ELF32_R_TYPE (reloc->r_info); |
310 | ||
e6ebd2e4 | 311 | #if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC |
a1ffb40e | 312 | if (__glibc_unlikely (r_type == R_390_RELATIVE)) |
e6ebd2e4 UD |
313 | { |
314 | # if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC | |
315 | /* This is defined in rtld.c, but nowhere in the static libc.a; | |
316 | make the reference weak so static programs can still link. | |
317 | This declaration cannot be done when compiling rtld.c | |
318 | (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the | |
319 | common defn for _dl_rtld_map, which is incompatible with a | |
320 | weak decl in the same file. */ | |
321 | # ifndef SHARED | |
322 | weak_extern (GL(dl_rtld_map)); | |
323 | # endif | |
324 | if (map != &GL(dl_rtld_map)) /* Already done in rtld itself. */ | |
325 | # endif | |
326 | *reloc_addr = map->l_addr + reloc->r_addend; | |
327 | } | |
328 | else | |
847b055c | 329 | #endif |
a1ffb40e | 330 | if (__glibc_unlikely (r_type == R_390_NONE)) |
e6ebd2e4 | 331 | return; |
1721af3f | 332 | else |
847b055c | 333 | { |
c5eebdd0 AK |
334 | #if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP |
335 | /* Only needed for R_390_COPY below. */ | |
847b055c | 336 | const Elf32_Sym *const refsym = sym; |
d347a4ab | 337 | #endif |
e6ebd2e4 UD |
338 | struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); |
339 | Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value; | |
847b055c | 340 | |
08f43f9b AK |
341 | if (sym != NULL |
342 | && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0) | |
343 | && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1) | |
344 | && __builtin_expect (!skip_ifunc, 1)) | |
345 | value = elf_ifunc_invoke (value); | |
346 | ||
1721af3f | 347 | switch (r_type) |
847b055c | 348 | { |
08f43f9b AK |
349 | case R_390_IRELATIVE: |
350 | value = map->l_addr + reloc->r_addend; | |
a1ffb40e | 351 | if (__glibc_likely (!skip_ifunc)) |
08f43f9b AK |
352 | value = elf_ifunc_invoke (value); |
353 | *reloc_addr = value; | |
354 | break; | |
355 | ||
c612d994 UD |
356 | case R_390_GLOB_DAT: |
357 | case R_390_JMP_SLOT: | |
e6ebd2e4 UD |
358 | *reloc_addr = value + reloc->r_addend; |
359 | break; | |
360 | ||
d063d164 | 361 | #ifndef RESOLVE_CONFLICT_FIND_MAP |
e6ebd2e4 UD |
362 | case R_390_TLS_DTPMOD: |
363 | # ifdef RTLD_BOOTSTRAP | |
364 | /* During startup the dynamic linker is always the module | |
365 | with index 1. | |
366 | XXX If this relocation is necessary move before RESOLVE | |
367 | call. */ | |
368 | *reloc_addr = 1; | |
369 | # else | |
370 | /* Get the information from the link map returned by the | |
371 | resolv function. */ | |
372 | if (sym_map != NULL) | |
373 | *reloc_addr = sym_map->l_tls_modid; | |
374 | # endif | |
375 | break; | |
376 | case R_390_TLS_DTPOFF: | |
377 | # ifndef RTLD_BOOTSTRAP | |
378 | /* During relocation all TLS symbols are defined and used. | |
379 | Therefore the offset is already correct. */ | |
380 | if (sym != NULL) | |
381 | *reloc_addr = sym->st_value + reloc->r_addend; | |
382 | # endif | |
c612d994 | 383 | break; |
e6ebd2e4 UD |
384 | case R_390_TLS_TPOFF: |
385 | /* The offset is negative, forward from the thread pointer. */ | |
386 | # ifdef RTLD_BOOTSTRAP | |
387 | *reloc_addr = sym->st_value + reloc->r_addend - map->l_tls_offset; | |
388 | # else | |
389 | /* We know the offset of the object the symbol is contained in. | |
390 | It is a negative value which will be added to the | |
391 | thread pointer. */ | |
392 | if (sym != NULL) | |
393 | { | |
394 | CHECK_STATIC_TLS (map, sym_map); | |
395 | *reloc_addr = (sym->st_value + reloc->r_addend | |
396 | - sym_map->l_tls_offset); | |
397 | } | |
398 | #endif | |
399 | break; | |
400 | #endif /* use TLS */ | |
401 | ||
c612d994 | 402 | #ifndef RTLD_BOOTSTRAP |
8e27f45e RM |
403 | # ifndef RESOLVE_CONFLICT_FIND_MAP |
404 | /* Not needed in dl-conflict.c. */ | |
847b055c AJ |
405 | case R_390_COPY: |
406 | if (sym == NULL) | |
407 | /* This can happen in trace mode if an object could not be | |
408 | found. */ | |
409 | break; | |
410 | if (__builtin_expect (sym->st_size > refsym->st_size, 0) | |
411 | || (__builtin_expect (sym->st_size < refsym->st_size, 0) | |
afdca0f2 | 412 | && __builtin_expect (GLRO(dl_verbose), 0))) |
847b055c AJ |
413 | { |
414 | const char *strtab; | |
415 | ||
416 | strtab = (const char *) D_PTR(map,l_info[DT_STRTAB]); | |
35fc382a UD |
417 | _dl_error_printf ("\ |
418 | %s: Symbol `%s' has different size in shared object, consider re-linking\n", | |
b9375348 | 419 | RTLD_PROGNAME, strtab + refsym->st_name); |
847b055c | 420 | } |
87d254a7 AO |
421 | memcpy (reloc_addr_arg, (void *) value, |
422 | MIN (sym->st_size, refsym->st_size)); | |
847b055c | 423 | break; |
8e27f45e | 424 | # endif |
847b055c | 425 | case R_390_32: |
c612d994 UD |
426 | *reloc_addr = value + reloc->r_addend; |
427 | break; | |
428 | case R_390_16: | |
429 | *(unsigned short *) reloc_addr = value + reloc->r_addend; | |
430 | break; | |
431 | case R_390_8: | |
432 | *(char *) reloc_addr = value + reloc->r_addend; | |
433 | break; | |
8e27f45e | 434 | # ifndef RESOLVE_CONFLICT_FIND_MAP |
847b055c | 435 | case R_390_PC32: |
f4f8cd2c | 436 | *reloc_addr = value + reloc->r_addend - (Elf32_Addr) reloc_addr; |
847b055c | 437 | break; |
c612d994 | 438 | case R_390_PC16DBL: |
c612d994 UD |
439 | *(unsigned short *) reloc_addr = (unsigned short) |
440 | ((short) (value + reloc->r_addend - (Elf32_Addr) reloc_addr) >> 1); | |
441 | break; | |
caf512de MS |
442 | case R_390_PC32DBL: |
443 | *(unsigned int *) reloc_addr = (unsigned int) | |
444 | ((int) (value + reloc->r_addend - (Elf32_Addr) reloc_addr) >> 1); | |
445 | break; | |
c612d994 UD |
446 | case R_390_PC16: |
447 | *(unsigned short *) reloc_addr = | |
448 | value + reloc->r_addend - (Elf32_Addr) reloc_addr; | |
449 | break; | |
847b055c AJ |
450 | case R_390_NONE: |
451 | break; | |
8e27f45e | 452 | # endif |
c612d994 UD |
453 | #endif |
454 | #if !defined(RTLD_BOOTSTRAP) || defined(_NDEBUG) | |
847b055c | 455 | default: |
c612d994 UD |
456 | /* We add these checks in the version to relocate ld.so only |
457 | if we are still debugging. */ | |
1721af3f | 458 | _dl_reloc_bad_type (map, r_type, 0); |
847b055c | 459 | break; |
c612d994 | 460 | #endif |
847b055c AJ |
461 | } |
462 | } | |
463 | } | |
464 | ||
bb38d32c UD |
465 | auto inline void |
466 | __attribute__ ((always_inline)) | |
7c69dc8b | 467 | elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc, |
87d254a7 | 468 | void *const reloc_addr_arg) |
1721af3f | 469 | { |
87d254a7 | 470 | Elf32_Addr *const reloc_addr = reloc_addr_arg; |
1721af3f UD |
471 | *reloc_addr = l_addr + reloc->r_addend; |
472 | } | |
847b055c | 473 | |
bb38d32c UD |
474 | auto inline void |
475 | __attribute__ ((always_inline)) | |
847b055c | 476 | elf_machine_lazy_rel (struct link_map *map, |
3a62d00d AS |
477 | Elf32_Addr l_addr, const Elf32_Rela *reloc, |
478 | int skip_ifunc) | |
847b055c AJ |
479 | { |
480 | Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset); | |
1721af3f | 481 | const unsigned int r_type = ELF32_R_TYPE (reloc->r_info); |
847b055c | 482 | /* Check for unexpected PLT reloc type. */ |
a1ffb40e | 483 | if (__glibc_likely (r_type == R_390_JMP_SLOT)) |
32e6df36 UD |
484 | { |
485 | if (__builtin_expect (map->l_mach.plt, 0) == 0) | |
486 | *reloc_addr += l_addr; | |
487 | else | |
488 | *reloc_addr = | |
489 | map->l_mach.plt | |
490 | + (((Elf32_Addr) reloc_addr) - map->l_mach.gotplt) * 8; | |
491 | } | |
a1ffb40e | 492 | else if (__glibc_likely (r_type == R_390_IRELATIVE)) |
08f43f9b AK |
493 | { |
494 | Elf32_Addr value = map->l_addr + reloc->r_addend; | |
a1ffb40e | 495 | if (__glibc_likely (!skip_ifunc)) |
08f43f9b AK |
496 | value = elf_ifunc_invoke (value); |
497 | *reloc_addr = value; | |
498 | } | |
847b055c | 499 | else |
1721af3f | 500 | _dl_reloc_bad_type (map, r_type, 1); |
847b055c AJ |
501 | } |
502 | ||
bb38d32c | 503 | #endif /* RESOLVE_MAP */ |