headers_install.pl 1.8 KB

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  1. #!/usr/bin/perl -w
  2. #
  3. # headers_install prepare the listed header files for use in
  4. # user space and copy the files to their destination.
  5. #
  6. # Usage: headers_install.pl readdir installdir arch [files...]
  7. # readdir: dir to open files
  8. # installdir: dir to install the files
  9. # arch: current architecture
  10. # arch is used to force a reinstallation when the arch
  11. # changes because kbuild then detect a command line change.
  12. # files: list of files to check
  13. #
  14. # Step in preparation for users space:
  15. # 1) Drop all use of compiler.h definitions
  16. # 2) Drop include of compiler.h
  17. # 3) Drop all sections defined out by __KERNEL__ (using unifdef)
  18. use strict;
  19. my ($readdir, $installdir, $arch, @files) = @ARGV;
  20. my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";
  21. foreach my $file (@files) {
  22. my $tmpfile = "$installdir/$file.tmp";
  23. open(my $in, '<', "$readdir/$file")
  24. or die "$readdir/$file: $!\n";
  25. open(my $out, '>', $tmpfile)
  26. or die "$tmpfile: $!\n";
  27. while (my $line = <$in>) {
  28. $line =~ s/([\s(])__user\s/$1/g;
  29. $line =~ s/([\s(])__force\s/$1/g;
  30. $line =~ s/([\s(])__iomem\s/$1/g;
  31. $line =~ s/\s__attribute_const__\s/ /g;
  32. $line =~ s/\s__attribute_const__$//g;
  33. $line =~ s/\b__packed\b/__attribute__((packed))/g;
  34. $line =~ s/^#include <linux\/compiler.h>//;
  35. $line =~ s/(^|\s)(inline)\b/$1__$2__/g;
  36. $line =~ s/(^|\s)(asm)\b(\s|[(]|$)/$1__$2__$3/g;
  37. $line =~ s/(^|\s|[(])(volatile)\b(\s|[(]|$)/$1__$2__$3/g;
  38. printf {$out} "%s", $line;
  39. }
  40. close $out;
  41. close $in;
  42. system $unifdef . " $tmpfile > $installdir/$file";
  43. # unifdef will exit 0 on success, and will exit 1 when the
  44. # file was processed successfully but no changes were made,
  45. # so abort only when it's higher than that.
  46. my $e = $? >> 8;
  47. if ($e > 1) {
  48. die "$tmpfile: $!\n";
  49. }
  50. unlink $tmpfile;
  51. }
  52. exit 0;