1.\" Copyright (c) 2006,2008 Joseph Koshy. All rights reserved. 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" 2. Redistributions in binary form must reproduce the above copyright 9.\" notice, this list of conditions and the following disclaimer in the 10.\" documentation and/or other materials provided with the distribution. 11.\" 12.\" This software is provided by Joseph Koshy ``as is'' and 13.\" any express or implied warranties, including, but not limited to, the 14.\" implied warranties of merchantability and fitness for a particular purpose 15.\" are disclaimed. in no event shall Joseph Koshy be liable 16.\" for any direct, indirect, incidental, special, exemplary, or consequential 17.\" damages (including, but not limited to, procurement of substitute goods 18.\" or services; loss of use, data, or profits; or business interruption) 19.\" however caused and on any theory of liability, whether in contract, strict 20.\" liability, or tort (including negligence or otherwise) arising in any way 21.\" out of the use of this software, even if advised of the possibility of 22.\" such damage. 23.\" 24.\" $Id: gelf_getshdr.3 3639 2018-10-14 14:07:02Z jkoshy $ 25.\" 26.Dd August 27, 2006 27.Dt GELF_GETSHDR 3 28.Os 29.Sh NAME 30.Nm elf32_getshdr , 31.Nm elf64_getshdr , 32.Nm gelf_getshdr 33.Nd retrieve the class-dependent section header 34.Sh LIBRARY 35.Lb libelf 36.Sh SYNOPSIS 37.In libelf.h 38.Ft "Elf32_Shdr *" 39.Fn elf32_getshdr "Elf_Scn *scn" 40.Ft "Elf64_Shdr *" 41.Fn elf64_getshdr "Elf_Scn *scn" 42.In gelf.h 43.Ft "GElf_Shdr *" 44.Fn gelf_getshdr "Elf_Scn *scn" "GElf_Shdr *shdr" 45.Sh DESCRIPTION 46These functions return a pointer to the ELF Section Header data 47structure associated with section descriptor 48.Ar scn . 49.Pp 50Function 51.Fn elf32_getshdr 52retrieves a pointer to an 53.Vt Elf32_Shdr 54structure. 55Section descriptor 56.Ar scn 57must be associated with an ELF descriptor of class 58.Dv ELFCLASS32 . 59.Pp 60Function 61.Fn elf64_getshdr 62retrieves a pointer to an 63.Vt Elf64_Shdr 64structure. 65Section descriptor 66.Ar scn 67must be associated with an ELF descriptor of class 68.Dv ELFCLASS64 . 69.Pp 70Function 71.Fn gelf_getshdr 72copies the values in the section header associated with argument 73.Ar scn 74to the structure pointed to be argument 75.Ar dst . 76The 77.Vt GElf_Shdr 78data structure is described in 79.Xr gelf 3 . 80.Sh RETURN VALUES 81Functions 82.Fn elf32_getshdr 83and 84.Fn elf64_getshdr 85return a valid pointer to the appropriate section header on success 86or NULL if an error was encountered. 87.Pp 88Function 89.Fn gelf_getshdr 90returns argument 91.Ar dst 92if successful, or NULL if an error was encountered. 93.Sh ERRORS 94These functions may fail with the following errors: 95.Bl -tag -width "[ELF_E_RESOURCE]" 96.It Bq Er ELF_E_ARGUMENT 97Arguments 98.Ar scn 99or 100.Ar shdr 101were NULL. 102.It Bq Er ELF_E_ARGUMENT 103Argument 104.Ar scn 105was not associated a descriptor for an ELF object. 106.It Bq Er ELF_E_CLASS 107The ELF class associated with the section descriptor 108.Ar scn 109did not match the class expected by the API. 110.El 111.Sh SEE ALSO 112.Xr elf 3 , 113.Xr elf_getscn 3 , 114.Xr gelf 3 , 115.Xr gelf_update_shdr 3 116