| Clement Leger | 73516a3 | 2020-03-02 10:38:58 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Remote processor elf helpers defines |
| 4 | * |
| 5 | * Copyright (C) 2020 Kalray, Inc. |
| 6 | */ |
| 7 | |
| 8 | #ifndef REMOTEPROC_ELF_LOADER_H |
| 9 | #define REMOTEPROC_ELF_LOADER_H |
| 10 | |
| 11 | #include <linux/elf.h> |
| 12 | #include <linux/types.h> |
| 13 | |
| 14 | /** |
| 15 | * fw_elf_get_class - Get elf class |
| 16 | * @fw: the ELF firmware image |
| 17 | * |
| 18 | * Note that we use and elf32_hdr to access the class since the start of the |
| 19 | * struct is the same for both elf class |
| 20 | * |
| 21 | * Return: elf class of the firmware |
| 22 | */ |
| 23 | static inline u8 fw_elf_get_class(const struct firmware *fw) |
| 24 | { |
| 25 | struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; |
| 26 | |
| 27 | return ehdr->e_ident[EI_CLASS]; |
| 28 | } |
| 29 | |
| 30 | static inline void elf_hdr_init_ident(struct elf32_hdr *hdr, u8 class) |
| 31 | { |
| 32 | memcpy(hdr->e_ident, ELFMAG, SELFMAG); |
| 33 | hdr->e_ident[EI_CLASS] = class; |
| 34 | hdr->e_ident[EI_DATA] = ELFDATA2LSB; |
| 35 | hdr->e_ident[EI_VERSION] = EV_CURRENT; |
| 36 | hdr->e_ident[EI_OSABI] = ELFOSABI_NONE; |
| 37 | } |
| 38 | |
| 39 | /* Generate getter and setter for a specific elf struct/field */ |
| 40 | #define ELF_GEN_FIELD_GET_SET(__s, __field, __type) \ |
| 41 | static inline __type elf_##__s##_get_##__field(u8 class, const void *arg) \ |
| 42 | { \ |
| 43 | if (class == ELFCLASS32) \ |
| 44 | return (__type) ((const struct elf32_##__s *) arg)->__field; \ |
| 45 | else \ |
| 46 | return (__type) ((const struct elf64_##__s *) arg)->__field; \ |
| 47 | } \ |
| 48 | static inline void elf_##__s##_set_##__field(u8 class, void *arg, \ |
| 49 | __type value) \ |
| 50 | { \ |
| 51 | if (class == ELFCLASS32) \ |
| 52 | ((struct elf32_##__s *) arg)->__field = (__type) value; \ |
| 53 | else \ |
| 54 | ((struct elf64_##__s *) arg)->__field = (__type) value; \ |
| 55 | } |
| 56 | |
| 57 | ELF_GEN_FIELD_GET_SET(hdr, e_entry, u64) |
| 58 | ELF_GEN_FIELD_GET_SET(hdr, e_phnum, u16) |
| 59 | ELF_GEN_FIELD_GET_SET(hdr, e_shnum, u16) |
| 60 | ELF_GEN_FIELD_GET_SET(hdr, e_phoff, u64) |
| 61 | ELF_GEN_FIELD_GET_SET(hdr, e_shoff, u64) |
| 62 | ELF_GEN_FIELD_GET_SET(hdr, e_shstrndx, u16) |
| 63 | ELF_GEN_FIELD_GET_SET(hdr, e_machine, u16) |
| 64 | ELF_GEN_FIELD_GET_SET(hdr, e_type, u16) |
| 65 | ELF_GEN_FIELD_GET_SET(hdr, e_version, u32) |
| 66 | ELF_GEN_FIELD_GET_SET(hdr, e_ehsize, u32) |
| 67 | ELF_GEN_FIELD_GET_SET(hdr, e_phentsize, u16) |
| 68 | |
| 69 | ELF_GEN_FIELD_GET_SET(phdr, p_paddr, u64) |
| 70 | ELF_GEN_FIELD_GET_SET(phdr, p_vaddr, u64) |
| 71 | ELF_GEN_FIELD_GET_SET(phdr, p_filesz, u64) |
| 72 | ELF_GEN_FIELD_GET_SET(phdr, p_memsz, u64) |
| 73 | ELF_GEN_FIELD_GET_SET(phdr, p_type, u32) |
| 74 | ELF_GEN_FIELD_GET_SET(phdr, p_offset, u64) |
| 75 | ELF_GEN_FIELD_GET_SET(phdr, p_flags, u32) |
| 76 | ELF_GEN_FIELD_GET_SET(phdr, p_align, u64) |
| 77 | |
| 78 | ELF_GEN_FIELD_GET_SET(shdr, sh_size, u64) |
| 79 | ELF_GEN_FIELD_GET_SET(shdr, sh_offset, u64) |
| 80 | ELF_GEN_FIELD_GET_SET(shdr, sh_name, u32) |
| 81 | ELF_GEN_FIELD_GET_SET(shdr, sh_addr, u64) |
| 82 | |
| 83 | #define ELF_STRUCT_SIZE(__s) \ |
| 84 | static inline unsigned long elf_size_of_##__s(u8 class) \ |
| 85 | { \ |
| 86 | if (class == ELFCLASS32)\ |
| 87 | return sizeof(struct elf32_##__s); \ |
| 88 | else \ |
| 89 | return sizeof(struct elf64_##__s); \ |
| 90 | } |
| 91 | |
| 92 | ELF_STRUCT_SIZE(shdr) |
| 93 | ELF_STRUCT_SIZE(phdr) |
| 94 | ELF_STRUCT_SIZE(hdr) |
| 95 | |
| 96 | #endif /* REMOTEPROC_ELF_LOADER_H */ |