1 /* Kernel dynamically loadable module help for PARISC.
3 * The best reference for this stuff is probably the Processor-
4 * Specific ELF Supplement for PA-RISC:
5 * http://ftp.parisc-linux.org/docs/arch/elf-pa-hp.pdf
7 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
8 * Copyright (C) 2003 Randolph Chung <tausq at debian . org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 * We are not doing SEGREL32 handling correctly. According to the ABI, we
29 * should do a value offset, like this:
30 * if (in_init(me, (void *)val))
31 * val -= (uint32_t)me->module_init;
33 * val -= (uint32_t)me->module_core;
34 * However, SEGREL32 is used only for PARISC unwind entries, and we want
35 * those entries to have an absolute address, and not just an offset.
37 * The unwind table mechanism has the ability to specify an offset for
38 * the unwind table; however, because we split off the init functions into
39 * a different piece of memory, it is not possible to do this using a
40 * single offset. Instead, we use the above hack for now.
43 #include <linux/moduleloader.h>
44 #include <linux/elf.h>
45 #include <linux/vmalloc.h>
47 #include <linux/string.h>
48 #include <linux/kernel.h>
49 #include <linux/bug.h>
50 #include <linux/uaccess.h>
52 #include <asm/sections.h>
53 #include <asm/unwind.h>
58 #define DEBUGP(fmt...)
61 #define CHECK_RELOC(val, bits) \
62 if ( ( !((val) & (1<<((bits)-1))) && ((val)>>(bits)) != 0 ) || \
63 ( ((val) & (1<<((bits)-1))) && ((val)>>(bits)) != (((__typeof__(val))(~0))>>((bits)+2)))) { \
64 printk(KERN_ERR "module %s relocation of symbol %s is out of range (0x%lx in %d bits)\n", \
65 me->name, strtab + sym->st_name, (unsigned long)val, bits); \
69 /* Maximum number of GOT entries. We use a long displacement ldd from
70 * the bottom of the table, which has a maximum signed displacement of
71 * 0x3fff; however, since we're only going forward, this becomes
72 * 0x1fff, and thus, since each GOT entry is 8 bytes long we can have
73 * at most 1023 entries */
76 /* three functions to determine where in the module core
77 * or init pieces the location is */
78 static inline int in_init(struct module *me, void *loc)
80 return (loc >= me->module_init &&
81 loc <= (me->module_init + me->init_size));
84 static inline int in_core(struct module *me, void *loc)
86 return (loc >= me->module_core &&
87 loc <= (me->module_core + me->core_size));
90 static inline int in_local(struct module *me, void *loc)
92 return in_init(me, loc) || in_core(me, loc);
95 static inline int in_local_section(struct module *me, void *loc, void *dot)
97 return (in_init(me, loc) && in_init(me, dot)) ||
98 (in_core(me, loc) && in_core(me, dot));
107 #define Elf_Fdesc Elf32_Fdesc
110 Elf32_Word insns[2]; /* each stub entry has two insns */
117 #define Elf_Fdesc Elf64_Fdesc
120 Elf64_Word insns[4]; /* each stub entry has four insns */
124 /* Field selection types defined by hppa */
125 #define rnd(x) (((x)+0x1000)&~0x1fff)
126 /* fsel: full 32 bits */
127 #define fsel(v,a) ((v)+(a))
128 /* lsel: select left 21 bits */
129 #define lsel(v,a) (((v)+(a))>>11)
130 /* rsel: select right 11 bits */
131 #define rsel(v,a) (((v)+(a))&0x7ff)
132 /* lrsel with rounding of addend to nearest 8k */
133 #define lrsel(v,a) (((v)+rnd(a))>>11)
134 /* rrsel with rounding of addend to nearest 8k */
135 #define rrsel(v,a) ((((v)+rnd(a))&0x7ff)+((a)-rnd(a)))
137 #define mask(x,sz) ((x) & ~((1<<(sz))-1))
140 /* The reassemble_* functions prepare an immediate value for
141 insertion into an opcode. pa-risc uses all sorts of weird bitfields
142 in the instruction to hold the value. */
143 static inline int reassemble_14(int as14)
145 return (((as14 & 0x1fff) << 1) |
146 ((as14 & 0x2000) >> 13));
149 static inline int reassemble_17(int as17)
151 return (((as17 & 0x10000) >> 16) |
152 ((as17 & 0x0f800) << 5) |
153 ((as17 & 0x00400) >> 8) |
154 ((as17 & 0x003ff) << 3));
157 static inline int reassemble_21(int as21)
159 return (((as21 & 0x100000) >> 20) |
160 ((as21 & 0x0ffe00) >> 8) |
161 ((as21 & 0x000180) << 7) |
162 ((as21 & 0x00007c) << 14) |
163 ((as21 & 0x000003) << 12));
166 static inline int reassemble_22(int as22)
168 return (((as22 & 0x200000) >> 21) |
169 ((as22 & 0x1f0000) << 5) |
170 ((as22 & 0x00f800) << 5) |
171 ((as22 & 0x000400) >> 8) |
172 ((as22 & 0x0003ff) << 3));
175 void *module_alloc(unsigned long size)
179 return vmalloc(size);
183 static inline unsigned long count_gots(const Elf_Rela *rela, unsigned long n)
188 static inline unsigned long count_fdescs(const Elf_Rela *rela, unsigned long n)
193 static inline unsigned long count_stubs(const Elf_Rela *rela, unsigned long n)
195 unsigned long cnt = 0;
197 for (; n > 0; n--, rela++)
199 switch (ELF32_R_TYPE(rela->r_info)) {
200 case R_PARISC_PCREL17F:
201 case R_PARISC_PCREL22F:
209 static inline unsigned long count_gots(const Elf_Rela *rela, unsigned long n)
211 unsigned long cnt = 0;
213 for (; n > 0; n--, rela++)
215 switch (ELF64_R_TYPE(rela->r_info)) {
216 case R_PARISC_LTOFF21L:
217 case R_PARISC_LTOFF14R:
218 case R_PARISC_PCREL22F:
226 static inline unsigned long count_fdescs(const Elf_Rela *rela, unsigned long n)
228 unsigned long cnt = 0;
230 for (; n > 0; n--, rela++)
232 switch (ELF64_R_TYPE(rela->r_info)) {
233 case R_PARISC_FPTR64:
241 static inline unsigned long count_stubs(const Elf_Rela *rela, unsigned long n)
243 unsigned long cnt = 0;
245 for (; n > 0; n--, rela++)
247 switch (ELF64_R_TYPE(rela->r_info)) {
248 case R_PARISC_PCREL22F:
258 /* Free memory returned from module_alloc */
259 void module_free(struct module *mod, void *module_region)
261 vfree(module_region);
262 /* FIXME: If module_region == mod->init_region, trim exception
267 int module_frob_arch_sections(CONST Elf_Ehdr *hdr,
268 CONST Elf_Shdr *sechdrs,
269 CONST char *secstrings,
272 unsigned long gots = 0, fdescs = 0, stubs = 0, init_stubs = 0;
275 for (i = 1; i < hdr->e_shnum; i++) {
276 const Elf_Rela *rels = (void *)hdr + sechdrs[i].sh_offset;
277 unsigned long nrels = sechdrs[i].sh_size / sizeof(*rels);
279 if (strncmp(secstrings + sechdrs[i].sh_name,
280 ".PARISC.unwind", 14) == 0)
281 me->arch.unwind_section = i;
283 if (sechdrs[i].sh_type != SHT_RELA)
286 /* some of these are not relevant for 32-bit/64-bit
287 * we leave them here to make the code common. the
288 * compiler will do its thing and optimize out the
289 * stuff we don't need
291 gots += count_gots(rels, nrels);
292 fdescs += count_fdescs(rels, nrels);
293 if(strncmp(secstrings + sechdrs[i].sh_name,
294 ".rela.init", 10) == 0)
295 init_stubs += count_stubs(rels, nrels);
297 stubs += count_stubs(rels, nrels);
300 /* align things a bit */
301 me->core_size = ALIGN(me->core_size, 16);
302 me->arch.got_offset = me->core_size;
303 me->core_size += gots * sizeof(struct got_entry);
305 me->core_size = ALIGN(me->core_size, 16);
306 me->arch.fdesc_offset = me->core_size;
307 me->core_size += fdescs * sizeof(Elf_Fdesc);
309 me->core_size = ALIGN(me->core_size, 16);
310 me->arch.stub_offset = me->core_size;
311 me->core_size += stubs * sizeof(struct stub_entry);
313 me->init_size = ALIGN(me->init_size, 16);
314 me->arch.init_stub_offset = me->init_size;
315 me->init_size += init_stubs * sizeof(struct stub_entry);
317 me->arch.got_max = gots;
318 me->arch.fdesc_max = fdescs;
319 me->arch.stub_max = stubs;
320 me->arch.init_stub_max = init_stubs;
326 static Elf64_Word get_got(struct module *me, unsigned long value, long addend)
329 struct got_entry *got;
335 got = me->module_core + me->arch.got_offset;
336 for (i = 0; got[i].addr; i++)
337 if (got[i].addr == value)
340 BUG_ON(++me->arch.got_count > me->arch.got_max);
344 DEBUGP("GOT ENTRY %d[%x] val %lx\n", i, i*sizeof(struct got_entry),
346 return i * sizeof(struct got_entry);
348 #endif /* CONFIG_64BIT */
351 static Elf_Addr get_fdesc(struct module *me, unsigned long value)
353 Elf_Fdesc *fdesc = me->module_core + me->arch.fdesc_offset;
356 printk(KERN_ERR "%s: zero OPD requested!\n", me->name);
360 /* Look for existing fdesc entry. */
361 while (fdesc->addr) {
362 if (fdesc->addr == value)
363 return (Elf_Addr)fdesc;
367 BUG_ON(++me->arch.fdesc_count > me->arch.fdesc_max);
371 fdesc->gp = (Elf_Addr)me->module_core + me->arch.got_offset;
372 return (Elf_Addr)fdesc;
374 #endif /* CONFIG_64BIT */
382 static Elf_Addr get_stub(struct module *me, unsigned long value, long addend,
383 enum elf_stub_type stub_type, int init_section)
386 struct stub_entry *stub;
389 i = me->arch.init_stub_count++;
390 BUG_ON(me->arch.init_stub_count > me->arch.init_stub_max);
391 stub = me->module_init + me->arch.init_stub_offset +
392 i * sizeof(struct stub_entry);
394 i = me->arch.stub_count++;
395 BUG_ON(me->arch.stub_count > me->arch.stub_max);
396 stub = me->module_core + me->arch.stub_offset +
397 i * sizeof(struct stub_entry);
401 /* for 32-bit the stub looks like this:
403 * be,n R'XXX(%sr4,%r1)
405 //value = *(unsigned long *)((value + addend) & ~3); /* why? */
407 stub->insns[0] = 0x20200000; /* ldil L'XXX,%r1 */
408 stub->insns[1] = 0xe0202002; /* be,n R'XXX(%sr4,%r1) */
410 stub->insns[0] |= reassemble_21(lrsel(value, addend));
411 stub->insns[1] |= reassemble_17(rrsel(value, addend) / 4);
414 /* for 64-bit we have three kinds of stubs:
415 * for normal function calls:
427 * for direct branches (jumps between different section of the
435 stub->insns[0] = 0x537b0000; /* ldd 0(%dp),%dp */
436 stub->insns[1] = 0x53610020; /* ldd 10(%dp),%r1 */
437 stub->insns[2] = 0xe820d000; /* bve (%r1) */
438 stub->insns[3] = 0x537b0030; /* ldd 18(%dp),%dp */
440 stub->insns[0] |= reassemble_14(get_got(me, value, addend) & 0x3fff);
443 stub->insns[0] = 0x20200000; /* ldil 0,%r1 */
444 stub->insns[1] = 0x34210000; /* ldo 0(%r1), %r1 */
445 stub->insns[2] = 0x50210020; /* ldd 10(%r1),%r1 */
446 stub->insns[3] = 0xe820d002; /* bve,n (%r1) */
448 stub->insns[0] |= reassemble_21(lrsel(value, addend));
449 stub->insns[1] |= reassemble_14(rrsel(value, addend));
451 case ELF_STUB_DIRECT:
452 stub->insns[0] = 0x20200000; /* ldil 0,%r1 */
453 stub->insns[1] = 0x34210000; /* ldo 0(%r1), %r1 */
454 stub->insns[2] = 0xe820d002; /* bve,n (%r1) */
456 stub->insns[0] |= reassemble_21(lrsel(value, addend));
457 stub->insns[1] |= reassemble_14(rrsel(value, addend));
463 return (Elf_Addr)stub;
466 int apply_relocate(Elf_Shdr *sechdrs,
468 unsigned int symindex,
472 /* parisc should not need this ... */
473 printk(KERN_ERR "module %s: RELOCATION unsupported\n",
479 int apply_relocate_add(Elf_Shdr *sechdrs,
481 unsigned int symindex,
486 Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
492 //unsigned long dp = (unsigned long)$global$;
493 register unsigned long dp asm ("r27");
495 DEBUGP("Applying relocate section %u to %u\n", relsec,
496 sechdrs[relsec].sh_info);
497 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
498 /* This is where to make the change */
499 loc = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
501 /* This is the symbol it is referring to */
502 sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
503 + ELF32_R_SYM(rel[i].r_info);
504 if (!sym->st_value) {
505 printk(KERN_WARNING "%s: Unknown symbol %s\n",
506 me->name, strtab + sym->st_name);
509 //dot = (sechdrs[relsec].sh_addr + rel->r_offset) & ~0x03;
510 dot = (Elf32_Addr)loc & ~0x03;
513 addend = rel[i].r_addend;
516 #define r(t) ELF32_R_TYPE(rel[i].r_info)==t ? #t :
517 DEBUGP("Symbol %s loc 0x%x val 0x%x addend 0x%x: %s\n",
518 strtab + sym->st_name,
519 (uint32_t)loc, val, addend,
533 switch (ELF32_R_TYPE(rel[i].r_info)) {
534 case R_PARISC_PLABEL32:
535 /* 32-bit function address */
536 /* no function descriptors... */
537 *loc = fsel(val, addend);
540 /* direct 32-bit ref */
541 *loc = fsel(val, addend);
543 case R_PARISC_DIR21L:
544 /* left 21 bits of effective address */
545 val = lrsel(val, addend);
546 *loc = mask(*loc, 21) | reassemble_21(val);
548 case R_PARISC_DIR14R:
549 /* right 14 bits of effective address */
550 val = rrsel(val, addend);
551 *loc = mask(*loc, 14) | reassemble_14(val);
553 case R_PARISC_SEGREL32:
554 /* 32-bit segment relative address */
555 /* See note about special handling of SEGREL32 at
556 * the beginning of this file.
558 *loc = fsel(val, addend);
560 case R_PARISC_DPREL21L:
561 /* left 21 bit of relative address */
562 val = lrsel(val - dp, addend);
563 *loc = mask(*loc, 21) | reassemble_21(val);
565 case R_PARISC_DPREL14R:
566 /* right 14 bit of relative address */
567 val = rrsel(val - dp, addend);
568 *loc = mask(*loc, 14) | reassemble_14(val);
570 case R_PARISC_PCREL17F:
571 /* 17-bit PC relative address */
572 val = get_stub(me, val, addend, ELF_STUB_GOT, in_init(me, loc));
573 val = (val - dot - 8)/4;
575 *loc = (*loc & ~0x1f1ffd) | reassemble_17(val);
577 case R_PARISC_PCREL22F:
578 /* 22-bit PC relative address; only defined for pa20 */
579 val = get_stub(me, val, addend, ELF_STUB_GOT, in_init(me, loc));
580 DEBUGP("STUB FOR %s loc %lx+%lx at %lx\n",
581 strtab + sym->st_name, (unsigned long)loc, addend,
583 val = (val - dot - 8)/4;
584 CHECK_RELOC(val, 22);
585 *loc = (*loc & ~0x3ff1ffd) | reassemble_22(val);
589 printk(KERN_ERR "module %s: Unknown relocation: %u\n",
590 me->name, ELF32_R_TYPE(rel[i].r_info));
599 int apply_relocate_add(Elf_Shdr *sechdrs,
601 unsigned int symindex,
606 Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr;
614 DEBUGP("Applying relocate section %u to %u\n", relsec,
615 sechdrs[relsec].sh_info);
616 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
617 /* This is where to make the change */
618 loc = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
620 /* This is the symbol it is referring to */
621 sym = (Elf64_Sym *)sechdrs[symindex].sh_addr
622 + ELF64_R_SYM(rel[i].r_info);
623 if (!sym->st_value) {
624 printk(KERN_WARNING "%s: Unknown symbol %s\n",
625 me->name, strtab + sym->st_name);
628 //dot = (sechdrs[relsec].sh_addr + rel->r_offset) & ~0x03;
629 dot = (Elf64_Addr)loc & ~0x03;
630 loc64 = (Elf64_Xword *)loc;
633 addend = rel[i].r_addend;
636 #define r(t) ELF64_R_TYPE(rel[i].r_info)==t ? #t :
637 printk("Symbol %s loc %p val 0x%Lx addend 0x%Lx: %s\n",
638 strtab + sym->st_name,
650 switch (ELF64_R_TYPE(rel[i].r_info)) {
651 case R_PARISC_LTOFF21L:
652 /* LT-relative; left 21 bits */
653 val = get_got(me, val, addend);
654 DEBUGP("LTOFF21L Symbol %s loc %p val %lx\n",
655 strtab + sym->st_name,
658 *loc = mask(*loc, 21) | reassemble_21(val);
660 case R_PARISC_LTOFF14R:
661 /* L(ltoff(val+addend)) */
662 /* LT-relative; right 14 bits */
663 val = get_got(me, val, addend);
665 DEBUGP("LTOFF14R Symbol %s loc %p val %lx\n",
666 strtab + sym->st_name,
668 *loc = mask(*loc, 14) | reassemble_14(val);
670 case R_PARISC_PCREL22F:
671 /* PC-relative; 22 bits */
672 DEBUGP("PCREL22F Symbol %s loc %p val %lx\n",
673 strtab + sym->st_name,
675 /* can we reach it locally? */
676 if(!in_local_section(me, (void *)val, (void *)dot)) {
678 if (in_local(me, (void *)val))
679 /* this is the case where the
680 * symbol is local to the
681 * module, but in a different
682 * section, so stub the jump
683 * in case it's more than 22
685 val = get_stub(me, val, addend, ELF_STUB_DIRECT,
687 else if (strncmp(strtab + sym->st_name, "$$", 2)
689 val = get_stub(me, val, addend, ELF_STUB_MILLI,
692 val = get_stub(me, val, addend, ELF_STUB_GOT,
695 DEBUGP("STUB FOR %s loc %lx, val %lx+%lx at %lx\n",
696 strtab + sym->st_name, loc, sym->st_value,
698 /* FIXME: local symbols work as long as the
699 * core and init pieces aren't separated too
700 * far. If this is ever broken, you will trip
701 * the check below. The way to fix it would
702 * be to generate local stubs to go between init
704 if((Elf64_Sxword)(val - dot - 8) > 0x800000 -1 ||
705 (Elf64_Sxword)(val - dot - 8) < -0x800000) {
706 printk(KERN_ERR "Module %s, symbol %s is out of range for PCREL22F relocation\n",
707 me->name, strtab + sym->st_name);
710 val = (val - dot - 8)/4;
711 *loc = (*loc & ~0x3ff1ffd) | reassemble_22(val);
714 /* 64-bit effective address */
715 *loc64 = val + addend;
717 case R_PARISC_SEGREL32:
718 /* 32-bit segment relative address */
719 /* See note about special handling of SEGREL32 at
720 * the beginning of this file.
722 *loc = fsel(val, addend);
724 case R_PARISC_FPTR64:
725 /* 64-bit function address */
726 if(in_local(me, (void *)(val + addend))) {
727 *loc64 = get_fdesc(me, val+addend);
728 DEBUGP("FDESC for %s at %p points to %lx\n",
729 strtab + sym->st_name, *loc64,
730 ((Elf_Fdesc *)*loc64)->addr);
732 /* if the symbol is not local to this
733 * module then val+addend is a pointer
734 * to the function descriptor */
735 DEBUGP("Non local FPTR64 Symbol %s loc %p val %lx\n",
736 strtab + sym->st_name,
738 *loc64 = val + addend;
743 printk(KERN_ERR "module %s: Unknown relocation: %Lu\n",
744 me->name, ELF64_R_TYPE(rel[i].r_info));
753 register_unwind_table(struct module *me,
754 const Elf_Shdr *sechdrs)
756 unsigned char *table, *end;
759 if (!me->arch.unwind_section)
762 table = (unsigned char *)sechdrs[me->arch.unwind_section].sh_addr;
763 end = table + sechdrs[me->arch.unwind_section].sh_size;
764 gp = (Elf_Addr)me->module_core + me->arch.got_offset;
766 DEBUGP("register_unwind_table(), sect = %d at 0x%p - 0x%p (gp=0x%lx)\n",
767 me->arch.unwind_section, table, end, gp);
768 me->arch.unwind = unwind_table_add(me->name, 0, gp, table, end);
772 deregister_unwind_table(struct module *me)
775 unwind_table_remove(me->arch.unwind);
778 int module_finalize(const Elf_Ehdr *hdr,
779 const Elf_Shdr *sechdrs,
784 const char *strtab = NULL;
785 Elf_Sym *newptr, *oldptr;
786 Elf_Shdr *symhdr = NULL;
791 entry = (Elf_Fdesc *)me->init;
792 printk("FINALIZE, ->init FPTR is %p, GP %lx ADDR %lx\n", entry,
793 entry->gp, entry->addr);
794 addr = (u32 *)entry->addr;
795 printk("INSNS: %x %x %x %x\n",
796 addr[0], addr[1], addr[2], addr[3]);
797 printk("stubs used %ld, stubs max %ld\n"
798 "init_stubs used %ld, init stubs max %ld\n"
799 "got entries used %ld, gots max %ld\n"
800 "fdescs used %ld, fdescs max %ld\n",
801 me->arch.stub_count, me->arch.stub_max,
802 me->arch.init_stub_count, me->arch.init_stub_max,
803 me->arch.got_count, me->arch.got_max,
804 me->arch.fdesc_count, me->arch.fdesc_max);
807 register_unwind_table(me, sechdrs);
809 /* haven't filled in me->symtab yet, so have to find it
811 for (i = 1; i < hdr->e_shnum; i++) {
812 if(sechdrs[i].sh_type == SHT_SYMTAB
813 && (sechdrs[i].sh_type & SHF_ALLOC)) {
814 int strindex = sechdrs[i].sh_link;
816 * The cast is to drop the const from
817 * the sechdrs pointer */
818 symhdr = (Elf_Shdr *)&sechdrs[i];
819 strtab = (char *)sechdrs[strindex].sh_addr;
824 DEBUGP("module %s: strtab %p, symhdr %p\n",
825 me->name, strtab, symhdr);
827 if(me->arch.got_count > MAX_GOTS) {
828 printk(KERN_ERR "%s: Global Offset Table overflow (used %ld, allowed %d)\n",
829 me->name, me->arch.got_count, MAX_GOTS);
833 /* no symbol table */
837 oldptr = (void *)symhdr->sh_addr;
838 newptr = oldptr + 1; /* we start counting at 1 */
839 nsyms = symhdr->sh_size / sizeof(Elf_Sym);
840 DEBUGP("OLD num_symtab %lu\n", nsyms);
842 for (i = 1; i < nsyms; i++) {
843 oldptr++; /* note, count starts at 1 so preincrement */
844 if(strncmp(strtab + oldptr->st_name,
854 nsyms = newptr - (Elf_Sym *)symhdr->sh_addr;
855 DEBUGP("NEW num_symtab %lu\n", nsyms);
856 symhdr->sh_size = nsyms * sizeof(Elf_Sym);
857 return module_bug_finalize(hdr, sechdrs, me);
860 void module_arch_cleanup(struct module *mod)
862 deregister_unwind_table(mod);
863 module_bug_cleanup(mod);
867 void *dereference_function_descriptor(void *ptr)
869 Elf64_Fdesc *desc = ptr;
872 if (!probe_kernel_address(&desc->addr, p))