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55f6cb9d0b
We had a case of duplicate CPU feature strings, a user space ABI violation, for almost two years. Make it a build error so that doesn't happen again. Link: http://lkml.kernel.org/r/4FE34BCB.5050305@linux.intel.com Cc: Jan Beulich <JBeulich@suse.com> Cc: Jean Delvare <khali@linux-fr.org>
46 lines
884 B
Perl
46 lines
884 B
Perl
#!/usr/bin/perl
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#
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# Generate the x86_cap_flags[] array from include/asm-x86/cpufeature.h
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#
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($in, $out) = @ARGV;
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open(IN, "< $in\0") or die "$0: cannot open: $in: $!\n";
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open(OUT, "> $out\0") or die "$0: cannot create: $out: $!\n";
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print OUT "#include <asm/cpufeature.h>\n\n";
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print OUT "const char * const x86_cap_flags[NCAPINTS*32] = {\n";
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%features = ();
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$err = 0;
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while (defined($line = <IN>)) {
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if ($line =~ /^\s*\#\s*define\s+(X86_FEATURE_(\S+))\s+(.*)$/) {
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$macro = $1;
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$feature = "\L$2";
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$tail = $3;
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if ($tail =~ /\/\*\s*\"([^"]*)\".*\*\//) {
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$feature = "\L$1";
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}
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next if ($feature eq '');
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if ($features{$feature}++) {
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print STDERR "$in: duplicate feature name: $feature\n";
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$err++;
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}
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printf OUT "\t%-32s = \"%s\",%s\n", "[$macro]", $feature;
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}
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}
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print OUT "};\n";
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close(IN);
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close(OUT);
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if ($err) {
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unlink($out);
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exit(1);
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}
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exit(0);
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