^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2007-2009 PetaLogix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/moduleloader.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pgtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) unsigned int symindex, unsigned int relsec, struct module *module)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) Elf32_Sym *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) unsigned long int *location;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned long int value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #if __GNUC__ < 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) unsigned long int old_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) pr_debug("Applying add relocation section %u to %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) relsec, sechdrs[relsec].sh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) rela[i].r_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) sym = (Elf32_Sym *)sechdrs[symindex].sh_addr +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) ELF32_R_SYM(rela[i].r_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) value = sym->st_value + rela[i].r_addend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) switch (ELF32_R_TYPE(rela[i].r_info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * Be careful! mb-gcc / mb-ld splits the relocs between the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * text and the reloc table. In general this means we must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * read the current contents of (*location), add any offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * then store the result back in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) case R_MICROBLAZE_32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #if __GNUC__ < 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) old_value = *location;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) *location = value + old_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) pr_debug("R_MICROBLAZE_32 (%08lx->%08lx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) old_value, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) *location = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) case R_MICROBLAZE_64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #if __GNUC__ < 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* Split relocs only required/used pre gcc4.1.1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) old_value = ((location[0] & 0x0000FFFF) << 16) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) (location[1] & 0x0000FFFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) value += old_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) location[0] = (location[0] & 0xFFFF0000) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) (value >> 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) location[1] = (location[1] & 0xFFFF0000) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) (value & 0xFFFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #if __GNUC__ < 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) pr_debug("R_MICROBLAZE_64 (%08lx->%08lx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) old_value, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) case R_MICROBLAZE_64_PCREL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #if __GNUC__ < 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) old_value = (location[0] & 0xFFFF) << 16 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) (location[1] & 0xFFFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) value -= old_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) value -= (unsigned long int)(location) + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) location[0] = (location[0] & 0xFFFF0000) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) (value >> 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) location[1] = (location[1] & 0xFFFF0000) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) (value & 0xFFFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) pr_debug("R_MICROBLAZE_64_PCREL (%08lx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) case R_MICROBLAZE_32_PCREL_LO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) pr_debug("R_MICROBLAZE_32_PCREL_LO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) case R_MICROBLAZE_64_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) pr_debug("R_MICROBLAZE_64_NONE\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) case R_MICROBLAZE_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) pr_debug("R_MICROBLAZE_NONE\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) pr_err("module %s: Unknown relocation: %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) module->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ELF32_R_TYPE(rela[i].r_info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct module *module)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) flush_dcache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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