| /* |
| * Copyright (c) 2023 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/llext/elf.h> |
| #include <zephyr/llext/llext.h> |
| #include <zephyr/llext/loader.h> |
| #include <zephyr/logging/log.h> |
| |
| LOG_MODULE_DECLARE(llext); |
| |
| #define R_XTENSA_NONE 0 |
| #define R_XTENSA_32 1 |
| #define R_XTENSA_RTLD 2 |
| #define R_XTENSA_GLOB_DAT 3 |
| #define R_XTENSA_JMP_SLOT 4 |
| #define R_XTENSA_RELATIVE 5 |
| #define R_XTENSA_PLT 6 |
| |
| /** |
| * @brief Architecture specific function for relocating shared elf |
| * |
| * Elf files contain a series of relocations described in multiple sections. |
| * These relocation instructions are architecture specific and each architecture |
| * supporting modules must implement this. |
| */ |
| void arch_elf_relocate_local(struct llext_loader *ldr, struct llext *ext, |
| elf_rela_t *rel, size_t got_offset) |
| { |
| uint8_t *text = ext->mem[LLEXT_MEM_TEXT]; |
| int type = ELF32_R_TYPE(rel->r_info); |
| |
| if (type == R_XTENSA_RELATIVE) { |
| elf_word ptr_offset = *(elf_word *)(text + got_offset); |
| |
| LOG_DBG("relocation type %u offset %#x value %#x", |
| type, got_offset, ptr_offset); |
| |
| /* Relocate a local symbol: Xtensa specific */ |
| *(elf_word *)(text + got_offset) = (elf_word)(text + ptr_offset - |
| ldr->sects[LLEXT_MEM_TEXT].sh_addr); |
| } |
| } |