123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/* 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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