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Commit d56ac6f2 authored by Lingutla Chandrasekhar's avatar Lingutla Chandrasekhar
Browse files

elf: Add elf headers helpers support 



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: default avatarLingutla Chandrasekhar <clingutla@codeaurora.org>
parent 8bbf9a7c

drivers/soc/qcom/msm_minidump.c

+0 −27
Original line number Diff line number Diff line
@@ -87,33 +87,6 @@ bool minidump_enabled; 
static unsigned int pendings;

static unsigned int region_idx = 1; /* First entry is ELF header*/



static inline struct elf_shdr *elf_sheader(struct elfhdr *hdr)

{

	return (struct elf_shdr *)((size_t)hdr + (size_t)hdr->e_shoff);

}



static inline struct elf_shdr *elf_section(struct elfhdr *hdr, int idx)

{

	return &elf_sheader(hdr)[idx];

}



static inline struct elf_phdr *elf_pheader(struct elfhdr *hdr)

{

	return (struct elf_phdr *)((size_t)hdr + (size_t)hdr->e_phoff);

}



static inline struct elf_phdr *elf_program(struct elfhdr *hdr, int idx)

{

	return &elf_pheader(hdr)[idx];

}



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;

}



static inline char *elf_lookup_string(struct elfhdr *hdr, int offset)

{

	char *strtab = elf_str_table(hdr);

drivers/soc/qcom/ramdump.c

+0 −17
Original line number Diff line number Diff line
@@ -454,23 +454,6 @@ static int _do_ramdump(void *handle, struct ramdump_segment *segments, 


}



static inline struct elf_shdr *elf_sheader(struct elfhdr *hdr)

{

	return (struct elf_shdr *)((size_t)hdr + (size_t)hdr->e_shoff);

}



static inline struct elf_shdr *elf_section(struct elfhdr *hdr, int idx)

{

	return &elf_sheader(hdr)[idx];

}



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;

}



static inline unsigned int set_section_name(const char *name,

					    struct elfhdr *ehdr)

{

include/linux/elf.h

+33 −0
Original line number Diff line number Diff line
@@ -42,6 +42,39 @@ 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;