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190 lines
6.2 KiB
Groff
190 lines
6.2 KiB
Groff
.\" Copyright (c) 2010-2011 Joseph Koshy. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" This software is provided by Joseph Koshy ``as is'' and
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.\" any express or implied warranties, including, but not limited to, the
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.\" implied warranties of merchantability and fitness for a particular purpose
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.\" are disclaimed. in no event shall Joseph Koshy be liable
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.\" for any direct, indirect, incidental, special, exemplary, or consequential
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.\" damages (including, but not limited to, procurement of substitute goods
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.\" or services; loss of use, data, or profits; or business interruption)
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.\" however caused and on any theory of liability, whether in contract, strict
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.\" liability, or tort (including negligence or otherwise) arising in any way
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.\" out of the use of this software, even if advised of the possibility of
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.\" such damage.
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.\"
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.\" $Id: elftc_bfd_find_target.3 2251 2011-11-30 16:50:06Z jkoshy $
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.\"
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.Dd November 30, 2011
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.Os
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.Dt ELFTC_BFD_FIND_TARGET
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.Sh NAME
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.Nm elftc_bfd_find_target ,
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.Nm elftc_bfd_target_byteorder ,
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.Nm elftc_bfd_target_class ,
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.Nm elftc_bfd_target_flavor ,
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.Nm elftc_bfd_target_machine
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.Nd binary object descriptor handling
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.Sh LIBRARY
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.Lb libelftc
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.Sh SYNOPSIS
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.In libelftc.h
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.Vt struct Elftc_Bfd_Target;
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.Ft "Elftc_Bfd_Target *"
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.Fn elftc_bfd_find_target "const char *target_name"
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.Ft "unsigned int"
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.Fn elftc_bfd_target_class "Elftc_Bfd_Target *target"
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.Ft "unsigned int"
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.Fn elftc_bfd_target_byteorder "Elftc_Bfd_Target *target"
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.Ft Elftc_Bfd_Target_Flavor
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.Fn elftc_bfd_target_flavor "Elftc_Bfd_Target *target"
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.Ft "unsigned int"
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.Fn elftc_bfd_target_machine "Elftc_Bfd_Target *target"
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.Sh DESCRIPTION
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Function
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.Fn elftc_bfd_find_target
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locates a binary object descriptor corresponding to the descriptor
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name in argument
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.Ar "target_name" .
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Binary object descriptors encapsulate properties of an object format
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such as its file representation, ELF class, and byte endianness.
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.Pp
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Known descriptor names and their properties include:
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.Bl -column -offset "XXXX" ".Li elf32-x86-64-freebsd" "Object format" "Byte Order" "ELF Class"
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.It Em Name Ta Em "Object Format" Ta Em "Byte Order" Ta Em "ELF Class"
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.It Li binary Ta Binary Ta - Ta -
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.It Li elf32-avr Ta ELF Ta LSB Ta 32
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.It Li elf32-big Ta ELF Ta MSB Ta 32
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.It Li elf32-bigarm Ta ELF Ta MSB Ta 32
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.It Li elf32-bigmips Ta ELF Ta MSB Ta 32
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.It Li elf32-i386 Ta ELF Ta LSB Ta 32
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.It Li elf32-i386-freebsd Ta ELF Ta LSB Ta 32
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.It Li elf32-ia64-big Ta ELF Ta MSB Ta 32
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.It Li elf32-little Ta ELF Ta LSB Ta 32
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.It Li elf32-littlearm Ta ELF Ta LSB Ta 32
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.It Li elf32-littlemips Ta ELF Ta LSB Ta 32
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.It Li elf32-powerpc Ta ELF Ta MSB Ta 32
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.It Li elf32-powerpcle Ta ELF Ta LSB Ta 32
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.It Li elf32-sh Ta ELF Ta MSB Ta 32
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.It Li elf32-shl Ta ELF Ta LSB Ta 32
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.It Li elf32-sh-nbsd Ta ELF Ta MSB Ta 32
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.It Li elf32-shl-nbsd Ta ELF Ta LSB Ta 32
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.It Li elf32-shbig-linux Ta ELF Ta MSB Ta 32
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.It Li elf32-shl-linux Ta ELF Ta LSB Ta 32
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.It Li elf32-sparc Ta ELF Ta MSB Ta 32
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.It Li elf64-alpha Ta ELF Ta LSB Ta 64
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.It Li elf64-alpha-freebsd Ta ELF Ta LSB Ta 64
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.It Li elf64-big Ta ELF Ta MSB Ta 64
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.It Li elf64-bigmips Ta ELF Ta MSB Ta 64
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.It Li elf64-ia64-big Ta ELF Ta MSB Ta 64
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.It Li elf64-ia64-little Ta ELF Ta LSB Ta 64
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.It Li elf64-little Ta ELF Ta LSB Ta 64
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.It Li elf64-littlemips Ta ELF Ta LSB Ta 64
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.It Li elf64-powerpc Ta ELF Ta MSB Ta 64
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.It Li elf64-powerpcle Ta ELF Ta LSB Ta 64
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.It Li elf64-sh64 Ta ELF Ta MSB Ta 64
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.It Li elf64-sh64l Ta ELF Ta LSB Ta 64
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.It Li elf64-sh64-nbsd Ta ELF Ta MSB Ta 64
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.It Li elf64-sh64l-nbsd Ta ELF Ta LSB Ta 64
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.It Li elf64-sh64big-linux Ta ELF Ta MSB Ta 64
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.It Li elf64-sh64-linux Ta ELF Ta LSB Ta 64
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.It Li elf64-sparc Ta ELF Ta MSB Ta 64
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.It Li elf64-sparc-freebsd Ta ELF Ta MSB Ta 64
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.It Li elf64-x86-64 Ta ELF Ta LSB Ta 64
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.It Li elf64-x86-64-freebsd Ta ELF Ta LSB Ta 64
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.It Li ihex Ta IHEX Ta - Ta -
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.It Li srec Ta SREC Ta - Ta -
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.It Li symbolsrec Ta SREC Ta - Ta -
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.El
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.Pp
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Function
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.Fn elftc_bfd_target_byteorder
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returns the ELF byte order associated with target descriptor
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.Ar target .
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.Pp
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Function
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.Fn elftc_bfd_target_class
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returns the ELF class associated with target descriptor
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.Ar target .
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.Pp
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Function
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.Fn elftc_bfd_target_flavor
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returns the object format associated with target descriptor
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.Ar target .
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The known object formats are:
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.Bl -tag -offset "XXXX" -width ".Dv ETF_BINARY" -compact
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.It Dv ETF_ELF
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An ELF object.
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.It Dv ETF_BINARY
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Raw binary.
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.It Dv ETF_IHEX
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An object encoded in
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.Tn Intel
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hex format.
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.It Dv ETF_NONE
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An unknown object format.
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.It Dv ETF_SREC
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An object encoded as S-records.
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.El
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.Sh RETURN VALUES
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Function
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.Fn elftc_bfd_find_target
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returns a valid pointer to an opaque binary target descriptor if
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successful, or NULL in case of an error.
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.Pp
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Function
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.Fn elftc_bfd_target_byteorder
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returns the ELF byte order associated with the target descriptor; one of
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.Dv ELFDATA2MSB
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or
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.Dv ELFDATA2LSB .
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.Pp
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Function
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.Fn elftc_bfd_target_class
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returns the ELF class associated with the target descriptor; one of
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.Dv ELFCLASS32
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or
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.Dv ELFCLASS64 .
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.Pp
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Function
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.Fn elftc_bfd_target_machine
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returns the ELF architecture associated with the target descriptor.
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.Pp
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Function
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.Fn elftc_bfd_target_flavor
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returns one of
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.Dv ETF_BINARY ,
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.Dv ETF_ELF ,
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.Dv ETF_IHEX
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or
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.Dv ETF_SREC
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if successful or
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.Dv ETF_NONE
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in case of error.
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.Sh EXAMPLES
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To return descriptor information associated with target name
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.Dq elf64-big
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use:
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.Bd -literal -offset indent
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struct Elftc_Bfd_Target *t;
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if ((t = elftc_bfd_find_target("elf64-big")) == NULL)
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errx(EXIT_FAILURE, "Cannot find target descriptor");
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printf("Class: %s\\n", elftc_bfd_target_class(t) == ELFCLASS32 ?
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"ELFCLASS32" : "ELFCLASS64");
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printf("Byteorder: %s\\n",
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elftc_bfd_target_byteorder(t) == ELFDATA2LSB ? "LSB" : "MSB");
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printf("Flavor: %d\\n", elftc_bfd_target_flavor(t));
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.Ed
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.Sh SEE ALSO
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.Xr elf 3
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