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ELF_FLAGDATA(3)		 BSD Library Functions Manual	       ELF_FLAGDATA(3)

NAME
     elf_flagdata, elf_flagehdr, elf_flagelf, elf_flagphdr, elf_flagscn,
     elf_flagshdr — manipulate flags associated with ELF(3) data structures

LIBRARY
     library “libelf”

SYNOPSIS
     #include <libelf.h>

     unsigned int
     elf_flagdata(Elf_Data *data, Elf_Cmd cmd, unsigned int flags);

     unsigned int
     elf_flagehdr(Elf *elf, Elf_Cmd cmd, unsigned int flags);

     unsigned int
     elf_flagelf(Elf *elf, Elf_Cmd cmd, unsigned int flags);

     unsigned int
     elf_flagphdr(Elf *elf, Elf_Cmd cmd, unsigned int flags);

     unsigned int
     elf_flagscn(Elf_Scn *scn, Elf_Cmd cmd, unsigned int flags);

     unsigned int
     elf_flagshdr(Elf_Scn *scn, Elf_Cmd cmd, unsigned int flags);

DESCRIPTION
     These functions are used to query, set or reset flags on data structures
     associated with an ELF file.

     Arguments data, elf and scn denote the data structures whose flags need
     to be changed.  These values are allowed to be NULL to simplify error
     handling in application code.

     Argument cmd may have the following values:

     ELF_C_CLR	The argument flags specifies the flags to be cleared.

     ELF_C_SET	The argument flags specifies the flags to be set.

     The argument flags is allowed to have the following flags set:

     ELF_F_DIRTY   Mark the associated data structure as needing to be written
		   back to the underlying file.	 A subsequent call to
		   elf_update(3) will resynchronize the library's internal
		   data structures.

     ELF_F_LAYOUT  This flag is only valid with the elf_flagelf() API.	It
		   informs the library that the application will take respon‐
		   sibility for the layout of the file and that the library is
		   not to insert any padding in between sections.

     Marking a given data structure as “dirty” affects all of its contained
     elements.	Thus marking an ELF descriptor elf with elf_flagelf(elf,
     ELF_C_SET, ELF_F_DIRTY) means that the entire contents of the descriptor
     are “dirty”.

     Using a value of zero for argument flags will return the current set of
     flags for the data structure being queried.

RETURN VALUES
     These functions return the updated flags is successful, and zero if an
     error is detected.

ERRORS
     These functions may fail with the following errors:

     [ELF_E_ARGUMENT]  An unsupported value was used for the cmd argument.

     [ELF_E_ARGUMENT]  Argument flags had unsupported flags set.

     [ELF_E_ARGUMENT]  The argument elf was not a descriptor for an ELF
		       object.

     [ELF_E_SEQUENCE]  Function elf_flagehdr() was called without an exe‐
		       cutable header being allocated.

     [ELF_E_SEQUENCE]  Function elf_flagphdr() was called without a program
		       header being allocated.

SEE ALSO
     elf(3), elf32_newehdr(3), elf32_newphdr(3), elf32_newshdr(3),
     elf64_newehdr(3), elf64_newphdr(3), elf64_newshdr(3), elf_newdata(3),
     elf_update(3), gelf(3), gelf_newehdr(3), gelf_newphdr(3),
     gelf_newshdr(3), gelf_update_dyn(3), gelf_update_move(3),
     gelf_update_rel(3), gelf_update_rela(3), gelf_update_sym(3),
     gelf_update_syminfo(3)

BSD			       October 22, 2007				   BSD

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