elf_getphdr(3E)

NAME
     elf_getphdr: elf32_getphdr, elf32_newphdr, elf64_getphdr, elf64_newphdr -
     retrieve class-dependent program header table

SYNOPSIS
     cc [flag ...] file ...  -lelf [library ...]

     #include <libelf.h>
     Elf32_Phdr *elf32_getphdr(Elf *elf);
     Elf32_Phdr *elf32_newphdr(Elf *elf, size_t count);
     Elf64_Phdr *elf64_getphdr(Elf *elf);
     Elf64_Phdr *elf64_newphdr(Elf *elf, size_t count);

DESCRIPTION
     For a 32-bit class file, elf32_getphdr returns a pointer to the program
     execution header table, if one is available for the ELF descriptor elf.

     elf32_newphdr allocates a new table with count entries, regardless of
     whether one existed previously, and sets the ELF_F_DIRTY bit for the
     table [see elf_flag(3E)].  Specifying a zero count deletes an existing
     table.  Note this behavior differs from that of elf32_newehdr [see
     elf32_getehdr(3E)], allowing a program to replace or delete the program
     header table, changing its size if necessary.

     If no program header table exists, the file is not a 32-bit class file,
     an error occurs, or elf is null, both functions return a null pointer.
     Additionally, elf32_newphdr returns a null pointer if count is zero.

     The table is an array of Elf32_Phdr structures, each of which includes
     the following members.

                  Elf32_Word      p_type;
                  Elf32_Off       p_offset;
                  Elf32_Addr      p_vaddr;
                  Elf32_Addr      p_paddr;
                  Elf32_Word      p_filesz;
                  Elf32_Word      p_memsz;
                  Elf32_Word      p_flags;
                  Elf32_Word      p_align;

     The ELF header's e_phnum member tells how many entries the program header
     table has [see elf_getehdr(3E)].  A program may inspect this value to
     determine the size of an existing table; elf32_newphdr automatically sets
     the member's value to count.  If the program is building a new file, it
     is responsible for creating the file's ELF header before creating the
     program header table.

     The 64-bit class works identically, simply replacing all instances of 32
     in the description and table with 64.
SEE ALSO
     elf(3E), elf_begin(3E), elf_flag(3E), elf_getehdr(3E).