diff options
Diffstat (limited to 'kexec/kexec-elf.h')
| -rw-r--r-- | kexec/kexec-elf.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/kexec/kexec-elf.h b/kexec/kexec-elf.h new file mode 100644 index 0000000..1e512c8 --- /dev/null +++ b/kexec/kexec-elf.h @@ -0,0 +1,143 @@ +#ifndef KEXEC_ELF_H +#define KEXEC_ELF_H + +#include <stdint.h> +#include <sys/types.h> + +struct kexec_info; + +struct mem_ehdr { + unsigned ei_class; + unsigned ei_data; + unsigned e_type; + unsigned e_machine; + unsigned e_version; + unsigned e_flags; + unsigned e_phnum; + unsigned e_shnum; + unsigned e_shstrndx; + unsigned long long e_entry; + unsigned long long e_phoff; + unsigned long long e_shoff; + unsigned e_notenum; + struct mem_phdr *e_phdr; + struct mem_shdr *e_shdr; + struct mem_note *e_note; + unsigned long rel_addr, rel_size; +}; + +struct mem_phdr { + unsigned long long p_paddr; + unsigned long long p_vaddr; + unsigned long long p_filesz; + unsigned long long p_memsz; + unsigned long long p_offset; + const char *p_data; + unsigned p_type; + unsigned p_flags; + unsigned long long p_align; +}; + +struct mem_shdr { + unsigned sh_name; + unsigned sh_type; + unsigned long long sh_flags; + unsigned long long sh_addr; + unsigned long long sh_offset; + unsigned long long sh_size; + unsigned sh_link; + unsigned sh_info; + unsigned long long sh_addralign; + unsigned long long sh_entsize; + const unsigned char *sh_data; +}; + +struct mem_sym { + unsigned long st_name; /* Symbol name (string tbl index) */ + unsigned char st_info; /* No defined meaning, 0 */ + unsigned char st_other; /* Symbol type and binding */ + unsigned st_shndx; /* Section index */ + unsigned long long st_value; /* Symbol value */ + unsigned long long st_size; /* Symbol size */ +}; + +struct mem_rela { + unsigned long long r_offset; + unsigned r_sym; + unsigned r_type; + unsigned long long r_addend; +}; + +struct mem_note { + unsigned n_type; + unsigned n_descsz; + const char *n_name; + const void *n_desc; +}; + +/* The definition of an ELF note does not vary depending + * on ELFCLASS. + */ +typedef struct +{ + uint32_t n_namesz; /* Length of the note's name. */ + uint32_t n_descsz; /* Length of the note's descriptor. */ + uint32_t n_type; /* Type of the note. */ +} ElfNN_Nhdr; + +/* Misc flags */ + +#define ELF_SKIP_FILESZ_CHECK 0x00000001 + +extern void free_elf_info(struct mem_ehdr *ehdr); +extern int build_elf_info(const char *buf, off_t len, struct mem_ehdr *ehdr, + uint32_t flags); +extern int build_elf_exec_info(const char *buf, off_t len, + struct mem_ehdr *ehdr, uint32_t flags); +extern int build_elf_rel_info(const char *buf, off_t len, struct mem_ehdr *ehdr, + uint32_t flags); + +extern int build_elf_core_info(const char *buf, off_t len, + struct mem_ehdr *ehdr, uint32_t flags); +extern int elf_exec_load(struct mem_ehdr *ehdr, struct kexec_info *info); +extern int elf_exec_load_relocatable(struct mem_ehdr *ehdr, struct kexec_info *info, + unsigned long reloc_min, unsigned long reloc_max, + unsigned long align); +extern int elf_rel_load(struct mem_ehdr *ehdr, struct kexec_info *info, + unsigned long min, unsigned long max, int end); + +extern void elf_exec_build_load(struct kexec_info *info, struct mem_ehdr *ehdr, + const char *buf, off_t len, uint32_t flags); +extern void elf_exec_build_load_relocatable(struct kexec_info *info, struct mem_ehdr *ehdr, + const char *buf, off_t len, uint32_t flags, + unsigned long reloc_min, unsigned long reloc_max, + unsigned long align); +extern void elf_rel_build_load(struct kexec_info *info, struct mem_ehdr *ehdr, + const char *buf, off_t len, unsigned long min, unsigned long max, + int end, uint32_t flags); + +extern int elf_rel_find_symbol(struct mem_ehdr *ehdr, + const char *name, struct mem_sym *ret_sym); +extern unsigned long elf_rel_get_addr(struct mem_ehdr *ehdr, const char *name); +extern void elf_rel_set_symbol(struct mem_ehdr *ehdr, + const char *name, const void *buf, size_t size); +extern void elf_rel_get_symbol(struct mem_ehdr *ehdr, + const char *name, void *buf, size_t size); + +uint16_t elf16_to_cpu(const struct mem_ehdr *ehdr, uint16_t value); +uint32_t elf32_to_cpu(const struct mem_ehdr *ehdr, uint32_t value); +uint64_t elf64_to_cpu(const struct mem_ehdr *ehdr, uint64_t value); + +uint16_t cpu_to_elf16(const struct mem_ehdr *ehdr, uint16_t value); +uint32_t cpu_to_elf32(const struct mem_ehdr *ehdr, uint32_t value); +uint64_t cpu_to_elf64(const struct mem_ehdr *ehdr, uint64_t value); + +unsigned long elf_max_addr(const struct mem_ehdr *ehdr); + +/* Architecture specific helper functions */ +extern int machine_verify_elf_rel(struct mem_ehdr *ehdr); +extern void machine_apply_elf_rel(struct mem_ehdr *ehdr, struct mem_sym *sym, + unsigned long r_type, void *location, unsigned long address, + unsigned long value); +#endif /* KEXEC_ELF_H */ + |