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elf: Add elf headers helpers support

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ELF header format is been used in multiple places,
add helper functions to get section, program headers, and
string table section details of the elf header.

Change-Id: Ib67b6f25a3a9c32305710eae4ad66bea511d6799
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
This commit is contained in:
Lingutla Chandrasekhar 2017-09-27 18:06:52 +05:30 committed by Rishabh Bhatnagar
parent 72969e942f
commit 9870256245
1 changed files with 33 additions and 0 deletions
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33
include/linux/elf.h
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@ -45,6 +45,39 @@ extern Elf64_Dyn _DYNAMIC [];
#endif
/* Generic helpers for ELF use */
/* Return first section header */
static inline struct elf_shdr *elf_sheader(struct elfhdr *hdr)
{
return (struct elf_shdr *)((size_t)hdr + (size_t)hdr->e_shoff);
}
/* Return idx section header */
static inline struct elf_shdr *elf_section(struct elfhdr *hdr, int idx)
{
return &elf_sheader(hdr)[idx];
}
/* Return first program header */
static inline struct elf_phdr *elf_pheader(struct elfhdr *hdr)
{
return (struct elf_phdr *)((size_t)hdr + (size_t)hdr->e_phoff);
}
/* Return idx program header */
static inline struct elf_phdr *elf_program(struct elfhdr *hdr, int idx)
{
return &elf_pheader(hdr)[idx];
}
/* Retunr section's string table header */
static inline char *elf_str_table(struct elfhdr *hdr)
{
if (hdr->e_shstrndx == SHN_UNDEF)
return NULL;
return (char *)hdr + elf_section(hdr, hdr->e_shstrndx)->sh_offset;
}
/* Optional callbacks to write extra ELF notes. */
struct file;
struct coredump_params;