.\" $NetBSD: elf_memory.3,v 1.1.1.1 2009/12/19 05:43:39 thorpej Exp $ .\" .\" Copyright (c) 2006 Joseph Koshy. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" This software is provided by Joseph Koshy ``as is'' and .\" any express or implied warranties, including, but not limited to, the .\" implied warranties of merchantability and fitness for a particular purpose .\" are disclaimed. in no event shall Joseph Koshy be liable .\" for any direct, indirect, incidental, special, exemplary, or consequential .\" damages (including, but not limited to, procurement of substitute goods .\" or services; loss of use, data, or profits; or business interruption) .\" however caused and on any theory of liability, whether in contract, strict .\" liability, or tort (including negligence or otherwise) arising in any way .\" out of the use of this software, even if advised of the possibility of .\" such damage. .\" .\" $FreeBSD: src/lib/libelf/elf_memory.3,v 1.3.10.1.2.1 2009/10/25 01:10:29 kensmith Exp $ .\" .Dd June 28, 2006 .Os .Dt ELF_MEMORY 3 .Sh NAME .Nm elf_memory .Nd process an ELF or ar(1) archive mapped into memory .Sh LIBRARY .Lb libelf .Sh SYNOPSIS .In libelf.h .Ft "Elf *" .Fn elf_memory "char *image" "size_t size" .Sh DESCRIPTION Function .Fn elf_memory is used to process an ELF file or .Xr ar 1 archive whose image is present in memory. .Pp Argument .Ar image points to the start of the memory image of the file or archive. Argument .Ar size contains the size in bytes of the memory image. .Pp The ELF descriptor is created for reading (i.e., analogous to the use of .Xr elf_begin 3 with a command argument value of .Dv ELF_C_READ Ns ). .Sh RETURN VALUES Function .Fn elf_memory returns a pointer to a new ELF descriptor if successful, or NULL if an error occurred. .Pp The return value may be queried for the file type using .Xr elf_kind 3 . .Sh EXAMPLES To read parse an elf file, use: .Bd -literal -offset indent int fd; void *p; struct stat sb; Elf *e; \&... if ((fd = open("./elf-file", O_RDONLY)) < 0 || fstat(fd, &sb) < 0 || (p = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, (off_t) 0)) == MAP_FAILED) { ... handle system error ... } if ((e = elf_memory(p, sb.st_size)) == NULL) { ... handle elf(3) error ... } \&... use ELF descriptor "e" here ... .Ed .Sh ERRORS Function .Fn elf_memory can fail with the following errors: .Bl -tag -width "[ELF_E_RESOURCE]" .It Bq Er ELF_E_ARGUMENT A NULL value was used for argument .Ar image or the value of argument .Ar sz was zero. .It Bq Er ELF_E_HEADER The header of the ELF object contained an unsupported value in its .Va e_ident[EI_CLASS] field. .It Bq Er ELF_E_HEADER The header of the ELF object contained an unsupported value in its .Va e_ident[EI_DATA] field. .It Bq Er ELF_E_RESOURCE An out of memory condition was detected. .It Bq Er ELF_E_SEQUENCE Function .Fn elf_memory was called before a working version was set using .Xr elf_version 3 . .It Bq Er ELF_E_VERSION The argument .Ar image corresponds to an ELF file with an unsupported version. .El .Sh SEE ALSO .Xr elf 3 , .Xr elf_begin 3 , .Xr elf_end 3 , .Xr elf_errno 3 , .Xr elf_kind 3 , .Xr gelf 3