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122 lines
3.4 KiB
122 lines
3.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Remote processor elf helpers defines |
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* |
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* Copyright (C) 2020 Kalray, Inc. |
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*/ |
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#ifndef REMOTEPROC_ELF_LOADER_H |
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#define REMOTEPROC_ELF_LOADER_H |
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#include <linux/elf.h> |
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#include <linux/types.h> |
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/** |
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* fw_elf_get_class - Get elf class |
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* @fw: the ELF firmware image |
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* |
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* Note that we use and elf32_hdr to access the class since the start of the |
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* struct is the same for both elf class |
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* |
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* Return: elf class of the firmware |
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*/ |
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static inline u8 fw_elf_get_class(const struct firmware *fw) |
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{ |
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struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; |
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return ehdr->e_ident[EI_CLASS]; |
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} |
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static inline void elf_hdr_init_ident(struct elf32_hdr *hdr, u8 class) |
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{ |
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memcpy(hdr->e_ident, ELFMAG, SELFMAG); |
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hdr->e_ident[EI_CLASS] = class; |
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hdr->e_ident[EI_DATA] = ELFDATA2LSB; |
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hdr->e_ident[EI_VERSION] = EV_CURRENT; |
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hdr->e_ident[EI_OSABI] = ELFOSABI_NONE; |
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} |
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/* Generate getter and setter for a specific elf struct/field */ |
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#define ELF_GEN_FIELD_GET_SET(__s, __field, __type) \ |
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static inline __type elf_##__s##_get_##__field(u8 class, const void *arg) \ |
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{ \ |
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if (class == ELFCLASS32) \ |
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return (__type) ((const struct elf32_##__s *) arg)->__field; \ |
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else \ |
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return (__type) ((const struct elf64_##__s *) arg)->__field; \ |
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} \ |
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static inline void elf_##__s##_set_##__field(u8 class, void *arg, \ |
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__type value) \ |
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{ \ |
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if (class == ELFCLASS32) \ |
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((struct elf32_##__s *) arg)->__field = (__type) value; \ |
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else \ |
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((struct elf64_##__s *) arg)->__field = (__type) value; \ |
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} |
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ELF_GEN_FIELD_GET_SET(hdr, e_entry, u64) |
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ELF_GEN_FIELD_GET_SET(hdr, e_phnum, u16) |
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ELF_GEN_FIELD_GET_SET(hdr, e_shnum, u16) |
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ELF_GEN_FIELD_GET_SET(hdr, e_phoff, u64) |
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ELF_GEN_FIELD_GET_SET(hdr, e_shoff, u64) |
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ELF_GEN_FIELD_GET_SET(hdr, e_shstrndx, u16) |
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ELF_GEN_FIELD_GET_SET(hdr, e_machine, u16) |
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ELF_GEN_FIELD_GET_SET(hdr, e_type, u16) |
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ELF_GEN_FIELD_GET_SET(hdr, e_version, u32) |
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ELF_GEN_FIELD_GET_SET(hdr, e_ehsize, u32) |
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ELF_GEN_FIELD_GET_SET(hdr, e_phentsize, u16) |
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ELF_GEN_FIELD_GET_SET(hdr, e_shentsize, u16) |
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ELF_GEN_FIELD_GET_SET(phdr, p_paddr, u64) |
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ELF_GEN_FIELD_GET_SET(phdr, p_vaddr, u64) |
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ELF_GEN_FIELD_GET_SET(phdr, p_filesz, u64) |
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ELF_GEN_FIELD_GET_SET(phdr, p_memsz, u64) |
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ELF_GEN_FIELD_GET_SET(phdr, p_type, u32) |
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ELF_GEN_FIELD_GET_SET(phdr, p_offset, u64) |
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ELF_GEN_FIELD_GET_SET(phdr, p_flags, u32) |
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ELF_GEN_FIELD_GET_SET(phdr, p_align, u64) |
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ELF_GEN_FIELD_GET_SET(shdr, sh_type, u32) |
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ELF_GEN_FIELD_GET_SET(shdr, sh_flags, u32) |
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ELF_GEN_FIELD_GET_SET(shdr, sh_entsize, u16) |
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ELF_GEN_FIELD_GET_SET(shdr, sh_size, u64) |
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ELF_GEN_FIELD_GET_SET(shdr, sh_offset, u64) |
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ELF_GEN_FIELD_GET_SET(shdr, sh_name, u32) |
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ELF_GEN_FIELD_GET_SET(shdr, sh_addr, u64) |
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#define ELF_STRUCT_SIZE(__s) \ |
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static inline unsigned long elf_size_of_##__s(u8 class) \ |
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{ \ |
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if (class == ELFCLASS32)\ |
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return sizeof(struct elf32_##__s); \ |
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else \ |
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return sizeof(struct elf64_##__s); \ |
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} |
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ELF_STRUCT_SIZE(shdr) |
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ELF_STRUCT_SIZE(phdr) |
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ELF_STRUCT_SIZE(hdr) |
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static inline unsigned int elf_strtbl_add(const char *name, void *ehdr, u8 class, size_t *index) |
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{ |
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u16 shstrndx = elf_hdr_get_e_shstrndx(class, ehdr); |
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void *shdr; |
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char *strtab; |
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size_t idx, ret; |
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shdr = ehdr + elf_size_of_hdr(class) + shstrndx * elf_size_of_shdr(class); |
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strtab = ehdr + elf_shdr_get_sh_offset(class, shdr); |
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idx = index ? *index : 0; |
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if (!strtab || !name) |
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return 0; |
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ret = idx; |
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strcpy((strtab + idx), name); |
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idx += strlen(name) + 1; |
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if (index) |
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*index = idx; |
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return ret; |
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} |
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#endif /* REMOTEPROC_ELF_LOADER_H */
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