^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Kernel module help for Alpha.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) Copyright (C) 2002 Richard Henderson.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/moduleloader.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define DEBUGP printk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define DEBUGP(fmt...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /* Allocate the GOT at the end of the core sections. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct got_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct got_entry *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) Elf64_Sxword r_addend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int got_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) process_reloc_for_got(Elf64_Rela *rela,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct got_entry *chains, Elf64_Xword *poffset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned long r_sym = ELF64_R_SYM (rela->r_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned long r_type = ELF64_R_TYPE (rela->r_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) Elf64_Sxword r_addend = rela->r_addend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct got_entry *g;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (r_type != R_ALPHA_LITERAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) for (g = chains + r_sym; g ; g = g->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (g->r_addend == r_addend) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (g->got_offset == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) g->got_offset = *poffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) *poffset += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) goto found_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) g = kmalloc (sizeof (*g), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) g->next = chains[r_sym].next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) g->r_addend = r_addend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) g->got_offset = *poffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) *poffset += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) chains[r_sym].next = g;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) found_entry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* Trick: most of the ELF64_R_TYPE field is unused. There are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 42 valid relocation types, and a 32-bit field. Co-opt the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) bits above 256 to store the got offset for this reloc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) rela->r_info |= g->got_offset << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) module_frob_arch_sections(Elf64_Ehdr *hdr, Elf64_Shdr *sechdrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) char *secstrings, struct module *me)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct got_entry *chains;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) Elf64_Rela *rela;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) Elf64_Shdr *esechdrs, *symtab, *s, *got;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) unsigned long nsyms, nrela, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) esechdrs = sechdrs + hdr->e_shnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) symtab = got = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* Find out how large the symbol table is. Allocate one got_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) head per symbol. Normally this will be enough, but not always.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) We'll chain different offsets for the symbol down each head. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) for (s = sechdrs; s < esechdrs; ++s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (s->sh_type == SHT_SYMTAB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) symtab = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) else if (!strcmp(".got", secstrings + s->sh_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) got = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) me->arch.gotsecindex = s - sechdrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!symtab) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) printk(KERN_ERR "module %s: no symbol table\n", me->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (!got) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) printk(KERN_ERR "module %s: no got section\n", me->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) nsyms = symtab->sh_size / sizeof(Elf64_Sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) chains = kcalloc(nsyms, sizeof(struct got_entry), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!chains) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) "module %s: no memory for symbol chain buffer\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) me->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) got->sh_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) got->sh_addralign = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) got->sh_type = SHT_NOBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /* Examine all LITERAL relocations to find out what GOT entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) are required. This sizes the GOT section as well. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) for (s = sechdrs; s < esechdrs; ++s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (s->sh_type == SHT_RELA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) nrela = s->sh_size / sizeof(Elf64_Rela);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) rela = (void *)hdr + s->sh_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) for (i = 0; i < nrela; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) process_reloc_for_got(rela+i, chains,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) &got->sh_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /* Free the memory we allocated. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) for (i = 0; i < nsyms; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct got_entry *g, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) for (g = chains[i].next; g ; g = n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) n = g->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) kfree(g);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) kfree(chains);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) apply_relocate_add(Elf64_Shdr *sechdrs, const char *strtab,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) unsigned int symindex, unsigned int relsec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct module *me)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) Elf64_Rela *rela = (void *)sechdrs[relsec].sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) unsigned long i, n = sechdrs[relsec].sh_size / sizeof(*rela);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) Elf64_Sym *symtab, *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) void *base, *location;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) unsigned long got, gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) DEBUGP("Applying relocate section %u to %u\n", relsec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) sechdrs[relsec].sh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) base = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) symtab = (Elf64_Sym *)sechdrs[symindex].sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /* The small sections were sorted to the end of the segment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) The following should definitely cover them. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) gp = (u64)me->core_layout.base + me->core_layout.size - 0x8000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) got = sechdrs[me->arch.gotsecindex].sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) for (i = 0; i < n; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) unsigned long r_sym = ELF64_R_SYM (rela[i].r_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) unsigned long r_type = ELF64_R_TYPE (rela[i].r_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) unsigned long r_got_offset = r_type >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) unsigned long value, hi, lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) r_type &= 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) /* This is where to make the change. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) location = base + rela[i].r_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* This is the symbol it is referring to. Note that all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) unresolved symbols have been resolved. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) sym = symtab + r_sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) value = sym->st_value + rela[i].r_addend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) switch (r_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) case R_ALPHA_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) case R_ALPHA_REFLONG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) *(u32 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) case R_ALPHA_REFQUAD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /* BUG() can produce misaligned relocations. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) ((u32 *)location)[0] = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) ((u32 *)location)[1] = value >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) case R_ALPHA_GPREL32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) value -= gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if ((int)value != value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) *(u32 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) case R_ALPHA_LITERAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) hi = got + r_got_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) lo = hi - gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if ((short)lo != lo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) *(u16 *)location = lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) *(u64 *)hi = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) case R_ALPHA_LITUSE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) case R_ALPHA_GPDISP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) value = gp - (u64)location;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) lo = (short)value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) hi = (int)(value - lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (hi + lo != value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) *(u16 *)location = hi >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) *(u16 *)(location + rela[i].r_addend) = lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) case R_ALPHA_BRSGP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /* BRSGP is only allowed to bind to local symbols.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) If the section is undef, this means that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) value was resolved from somewhere else. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (sym->st_shndx == SHN_UNDEF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if ((sym->st_other & STO_ALPHA_STD_GPLOAD) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) STO_ALPHA_STD_GPLOAD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* Omit the prologue. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) value += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) case R_ALPHA_BRADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) value -= (u64)location + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (value & 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) value = (long)value >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (value + (1<<21) >= 1<<22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) value &= 0x1fffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) value |= *(u32 *)location & ~0x1fffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) *(u32 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) case R_ALPHA_HINT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) case R_ALPHA_SREL32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) value -= (u64)location;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if ((int)value != value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) *(u32 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) case R_ALPHA_SREL64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) value -= (u64)location;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) *(u64 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) case R_ALPHA_GPRELHIGH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) value = (long)(value - gp + 0x8000) >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if ((short) value != value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) *(u16 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) case R_ALPHA_GPRELLOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) value -= gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) *(u16 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) case R_ALPHA_GPREL16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) value -= gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if ((short) value != value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) goto reloc_overflow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) *(u16 *)location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) printk(KERN_ERR "module %s: Unknown relocation: %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) me->name, r_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) reloc_overflow:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (ELF64_ST_TYPE (sym->st_info) == STT_SECTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) "module %s: Relocation (type %lu) overflow vs section %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) me->name, r_type, sym->st_shndx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) "module %s: Relocation (type %lu) overflow vs %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) me->name, r_type, strtab + sym->st_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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