source: rtems-tools/rtemstoolkit/elftoolchain/common/native-elf-format @ 31e22e3

Last change on this file since 31e22e3 was 31e22e3, checked in by Chris Johns <chrisj@…>, on Jan 8, 2017 at 10:05:18 PM

libelf: Use minimal environment for C translation with readelf.

The output of readelf needs to be in English.

  • Property mode set to 100755
File size: 1.1 KB
Line 
1#!/bin/sh
2#
3# $Id: native-elf-format 2064 2011-10-26 15:12:32Z jkoshy $
4#
5# Find the native ELF format for a host platform by compiling a
6# test object and examining the resulting object.
7#
8# This script is used if there is no easy way to determine this
9# information statically at compile time.
10
11program=`basename $0`
12tmp_c=`mktemp -u nefXXXXXX`.c
13tmp_o=`echo ${tmp_c} | sed -e 's/.c$/.o/'`
14
15trap "rm -f ${tmp_c} ${tmp_o}"  0 1 2 3 15
16
17touch ${tmp_c}
18
19echo "/* Generated by ${program} on `date` */"
20
21cc -c ${tmp_c} -o ${tmp_o}
22LANG="C" readelf -h ${tmp_o} | awk '
23$1 ~ "Class:" {
24        sub("ELF","",$2); elfclass = $2;
25    }
26$1 ~ "Data:"  {
27        if (match($0, "little")) {
28            elfdata = "LSB";
29        } else {
30            elfdata = "MSB";
31        }
32    }
33$1 ~ "Machine:" {
34        if (match($0, "Intel.*386")) {
35            elfarch = "EM_386";
36        } else if (match($0, ".*X86-64")) {
37            elfarch = "EM_X86_64";
38        } else {
39            elfarch = "unknown";
40        }
41    }
42END {
43    printf("#define     ELFTC_CLASS     ELFCLASS%s\n", elfclass);
44    printf("#define     ELFTC_ARCH      %s\n", elfarch);
45    printf("#define     ELFTC_BYTEORDER ELFDATA2%s\n", elfdata);
46}'
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