Eric Lee / smarc-fsl-linux-kernel

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#!/usr/bin/perl -w

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#!/usr/bin/perl -w

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#

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#

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# namespace.pl. Mon Aug 30 2004

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# namespace.pl. Mon Aug 30 2004

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#

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#

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# Perform a name space analysis on the linux kernel.

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# Perform a name space analysis on the linux kernel.

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#

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#

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# Copyright Keith Owens <kaos@ocs.com.au>. GPL.

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# Copyright Keith Owens <kaos@ocs.com.au>. GPL.

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#

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#

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# Invoke by changing directory to the top of the kernel object

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# Invoke by changing directory to the top of the kernel object

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# tree then namespace.pl, no parameters.

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# tree then namespace.pl, no parameters.

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#

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#

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# Tuned for 2.1.x kernels with the new module handling, it will

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# Tuned for 2.1.x kernels with the new module handling, it will

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# work with 2.0 kernels as well.

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# work with 2.0 kernels as well.

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#

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#

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# Last change 2.6.9-rc1, adding support for separate source and object

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# Last change 2.6.9-rc1, adding support for separate source and object

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# trees.

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# trees.

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#

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#

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# The source must be compiled/assembled first, the object files

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# The source must be compiled/assembled first, the object files

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# are the primary input to this script. Incomplete or missing

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# are the primary input to this script. Incomplete or missing

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# objects will result in a flawed analysis. Compile both vmlinux

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# objects will result in a flawed analysis. Compile both vmlinux

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# and modules.

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# and modules.

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#

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#

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# Even with complete objects, treat the result of the analysis

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# Even with complete objects, treat the result of the analysis

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# with caution. Some external references are only used by

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# with caution. Some external references are only used by

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# certain architectures, others with certain combinations of

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# certain architectures, others with certain combinations of

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# configuration parameters. Ideally the source should include

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# configuration parameters. Ideally the source should include

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# something like

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# something like

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#

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#

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# #ifndef CONFIG_...

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# #ifndef CONFIG_...

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# static

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# static

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# #endif

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# #endif

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# symbol_definition;

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# symbol_definition;

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#

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#

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# so the symbols are defined as static unless a particular

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# so the symbols are defined as static unless a particular

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# CONFIG_... requires it to be external.

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# CONFIG_... requires it to be external.

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#

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#

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# A symbol that is suffixed with '(export only)' has these properties

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# A symbol that is suffixed with '(export only)' has these properties

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#

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#

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# * It is global.

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# * It is global.

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# * It is marked EXPORT_SYMBOL or EXPORT_SYMBOL_GPL, either in the same

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# * It is marked EXPORT_SYMBOL or EXPORT_SYMBOL_GPL, either in the same

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# source file or a different source file.

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# source file or a different source file.

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# * Given the current .config, nothing uses the symbol.

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# * Given the current .config, nothing uses the symbol.

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#

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#

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# The symbol is a candidate for conversion to static, plus removal of the

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# The symbol is a candidate for conversion to static, plus removal of the

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# export. But be careful that a different .config might use the symbol.

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# export. But be careful that a different .config might use the symbol.

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#

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#

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#

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#

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# Name space analysis and cleanup is an iterative process. You cannot

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# Name space analysis and cleanup is an iterative process. You cannot

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# expect to find all the problems in a single pass.

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# expect to find all the problems in a single pass.

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#

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#

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# * Identify possibly unnecessary global declarations, verify that they

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# * Identify possibly unnecessary global declarations, verify that they

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# really are unnecessary and change them to static.

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# really are unnecessary and change them to static.

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# * Compile and fix up gcc warnings about static, removing dead symbols

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# * Compile and fix up gcc warnings about static, removing dead symbols

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# as necessary.

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# as necessary.

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# * make clean and rebuild with different configs (especially

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# * make clean and rebuild with different configs (especially

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# CONFIG_MODULES=n) to see which symbols are being defined when the

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# CONFIG_MODULES=n) to see which symbols are being defined when the

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# config does not require them. These symbols bloat the kernel object

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# config does not require them. These symbols bloat the kernel object

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# for no good reason, which is frustrating for embedded systems.

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# for no good reason, which is frustrating for embedded systems.

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# * Wrap config sensitive symbols in #ifdef CONFIG_foo, as long as the

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# * Wrap config sensitive symbols in #ifdef CONFIG_foo, as long as the

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# code does not get too ugly.

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# code does not get too ugly.

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# * Repeat the name space analysis until you can live with with the

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# * Repeat the name space analysis until you can live with with the

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# result.

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# result.

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#

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#

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require 5; # at least perl 5

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require 5; # at least perl 5

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use strict;

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use strict;

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use File::Find;

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use File::Find;

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my $nm = ($ENV{'NM'} || "nm") . " -p";

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my $nm = ($ENV{'NM'} || "nm") . " -p";

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my $objdump = ($ENV{'OBJDUMP'} || "objdump") . " -s -j .comment";

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my $objdump = ($ENV{'OBJDUMP'} || "objdump") . " -s -j .comment";

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my $srctree = "";

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my $srctree = "";

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my $objtree = "";

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my $objtree = "";

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$srctree = "$ENV{'srctree'}/" if (exists($ENV{'srctree'}));

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$srctree = "$ENV{'srctree'}/" if (exists($ENV{'srctree'}));

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$objtree = "$ENV{'objtree'}/" if (exists($ENV{'objtree'}));

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$objtree = "$ENV{'objtree'}/" if (exists($ENV{'objtree'}));

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if ($#ARGV != -1) {

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if ($#ARGV != -1) {

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print STDERR "usage: $0 takes no parameters\n";

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print STDERR "usage: $0 takes no parameters\n";

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die("giving up\n");

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die("giving up\n");

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}

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}

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my %nmdata = (); # nm data for each object

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my %nmdata = (); # nm data for each object

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my %def = (); # all definitions for each name

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my %def = (); # all definitions for each name

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my %ksymtab = (); # names that appear in __ksymtab_

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my %ksymtab = (); # names that appear in __ksymtab_

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my %ref = (); # $ref{$name} exists if there is a true external reference to $name

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my %ref = (); # $ref{$name} exists if there is a true external reference to $name

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my %export = (); # $export{$name} exists if there is an EXPORT_... of $name

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my %export = (); # $export{$name} exists if there is an EXPORT_... of $name

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&find(\&linux_objects, '.'); # find the objects and do_nm on them

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&find(\&linux_objects, '.'); # find the objects and do_nm on them

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&list_multiply_defined();

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&list_multiply_defined();

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&resolve_external_references();

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&resolve_external_references();

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&list_extra_externals();

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&list_extra_externals();

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exit(0);

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exit(0);

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sub linux_objects

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sub linux_objects

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{

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{

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# Select objects, ignoring objects which are only created by

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# Select objects, ignoring objects which are only created by

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# merging other objects. Also ignore all of modules, scripts

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# merging other objects. Also ignore all of modules, scripts

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# and compressed. Most conglomerate objects are handled by do_nm,

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# and compressed. Most conglomerate objects are handled by do_nm,

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# this list only contains the special cases. These include objects

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# this list only contains the special cases. These include objects

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# that are linked from just one other object and objects for which

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# that are linked from just one other object and objects for which

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# there is really no permanent source file.

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# there is really no permanent source file.

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my $basename = $_;

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my $basename = $_;

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$_ = $File::Find::name;

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$_ = $File::Find::name;

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s:^\./::;

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s:^\./::;

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if (/.*\.o$/ &&

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if (/.*\.o$/ &&

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! (

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! (

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m:/built-in.o$:

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m:/built-in.o$:

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|| m:arch/x86/kernel/vsyscall-syms.o$:

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|| m:arch/x86/kernel/vsyscall-syms.o$:

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|| m:arch/ia64/ia32/ia32.o$:

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|| m:arch/ia64/ia32/ia32.o$:

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|| m:arch/ia64/kernel/gate-syms.o$:

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|| m:arch/ia64/kernel/gate-syms.o$:

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|| m:arch/ia64/lib/__divdi3.o$:

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|| m:arch/ia64/lib/__divdi3.o$:

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|| m:arch/ia64/lib/__divsi3.o$:

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|| m:arch/ia64/lib/__divsi3.o$:

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|| m:arch/ia64/lib/__moddi3.o$:

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|| m:arch/ia64/lib/__moddi3.o$:

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|| m:arch/ia64/lib/__modsi3.o$:

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|| m:arch/ia64/lib/__modsi3.o$:

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|| m:arch/ia64/lib/__udivdi3.o$:

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|| m:arch/ia64/lib/__udivdi3.o$:

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|| m:arch/ia64/lib/__udivsi3.o$:

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|| m:arch/ia64/lib/__udivsi3.o$:

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|| m:arch/ia64/lib/__umoddi3.o$:

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|| m:arch/ia64/lib/__umoddi3.o$:

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|| m:arch/ia64/lib/__umodsi3.o$:

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|| m:arch/ia64/lib/__umodsi3.o$:

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|| m:arch/ia64/scripts/check_gas_for_hint.o$:

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|| m:arch/ia64/scripts/check_gas_for_hint.o$:

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|| m:arch/ia64/sn/kernel/xp.o$:

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|| m:arch/ia64/sn/kernel/xp.o$:

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|| m:boot/bbootsect.o$:

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|| m:boot/bbootsect.o$:

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|| m:boot/bsetup.o$:

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|| m:boot/bsetup.o$:

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|| m:/bootsect.o$:

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|| m:/bootsect.o$:

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|| m:/boot/setup.o$:

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|| m:/boot/setup.o$:

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|| m:/compressed/:

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|| m:/compressed/:

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|| m:drivers/cdrom/driver.o$:

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|| m:drivers/cdrom/driver.o$:

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|| m:drivers/char/drm/tdfx_drv.o$:

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|| m:drivers/char/drm/tdfx_drv.o$:

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|| m:drivers/ide/ide-detect.o$:

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|| m:drivers/ide/ide-detect.o$:

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|| m:drivers/ide/pci/idedriver-pci.o$:

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|| m:drivers/ide/pci/idedriver-pci.o$:

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|| m:drivers/media/media.o$:

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|| m:drivers/media/media.o$:

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|| m:drivers/scsi/sd_mod.o$:

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|| m:drivers/scsi/sd_mod.o$:

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|| m:drivers/video/video.o$:

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|| m:drivers/video/video.o$:

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|| m:fs/devpts/devpts.o$:

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|| m:fs/devpts/devpts.o$:

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|| m:fs/exportfs/exportfs.o$:

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|| m:fs/exportfs/exportfs.o$:

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|| m:fs/hugetlbfs/hugetlbfs.o$:

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|| m:fs/hugetlbfs/hugetlbfs.o$:

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|| m:fs/msdos/msdos.o$:

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|| m:fs/msdos/msdos.o$:

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|| m:fs/nls/nls.o$:

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|| m:fs/nls/nls.o$:

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|| m:fs/ramfs/ramfs.o$:

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|| m:fs/ramfs/ramfs.o$:

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|| m:fs/romfs/romfs.o$:

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|| m:fs/romfs/romfs.o$:

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|| m:fs/vfat/vfat.o$:

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|| m:fs/vfat/vfat.o$:

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|| m:init/mounts.o$:

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|| m:init/mounts.o$:

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|| m:^modules/:

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|| m:^modules/:

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|| m:net/netlink/netlink.o$:

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|| m:net/netlink/netlink.o$:

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|| m:net/sched/sched.o$:

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|| m:net/sched/sched.o$:

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|| m:/piggy.o$:

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|| m:/piggy.o$:

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|| m:^scripts/:

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|| m:^scripts/:

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|| m:sound/.*/snd-:

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|| m:sound/.*/snd-:

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|| m:^.*/\.tmp_:

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|| m:^.*/\.tmp_:

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|| m:^\.tmp_:

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|| m:^\.tmp_:

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|| m:/vmlinux-obj.o$:

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|| m:/vmlinux-obj.o$:

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)

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)

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) {

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) {

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do_nm($basename, $_);

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do_nm($basename, $_);

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}

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}

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$_ = $basename; # File::Find expects $_ untouched (undocumented)

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$_ = $basename; # File::Find expects $_ untouched (undocumented)

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}

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}

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sub do_nm

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sub do_nm

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{

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{

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my ($basename, $fullname) = @_;

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my ($basename, $fullname) = @_;

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my ($source, $type, $name);

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my ($source, $type, $name);

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if (! -e $basename) {

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if (! -e $basename) {

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printf STDERR "$basename does not exist\n";

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printf STDERR "$basename does not exist\n";

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return;

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return;

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}

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}

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if ($fullname !~ /\.o$/) {

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if ($fullname !~ /\.o$/) {

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printf STDERR "$fullname is not an object file\n";

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printf STDERR "$fullname is not an object file\n";

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return;

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return;

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}

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}

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($source = $fullname) =~ s/\.o$//;

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($source = $fullname) =~ s/\.o$//;

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if (-e "$objtree$source.c" || -e "$objtree$source.S") {

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if (-e "$objtree$source.c" || -e "$objtree$source.S") {

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$source = "$objtree$source";

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$source = "$objtree$source";

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} else {

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} else {

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$source = "$srctree$source";

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$source = "$srctree$source";

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}

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}

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if (! -e "$source.c" && ! -e "$source.S") {

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if (! -e "$source.c" && ! -e "$source.S") {

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# No obvious source, exclude the object if it is conglomerate

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# No obvious source, exclude the object if it is conglomerate

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if (! open(OBJDUMPDATA, "$objdump $basename|")) {

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open(my $objdumpdata, "$objdump $basename|")

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printf STDERR "$objdump $fullname failed $!\n";

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or die "$objdump $fullname failed $!\n";

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return;

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}

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my $comment;

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my $comment;

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while (<OBJDUMPDATA>) {

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while (<$objdumpdata>) {

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chomp();

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chomp();

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if (/^In archive/) {

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if (/^In archive/) {

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# Archives are always conglomerate

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# Archives are always conglomerate

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$comment = "GCC:GCC:";

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$comment = "GCC:GCC:";

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last;

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last;

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}

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}

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next if (! /^[ 0-9a-f]{5,} /);

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next if (! /^[ 0-9a-f]{5,} /);

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$comment .= substr($_, 43);

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$comment .= substr($_, 43);

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}

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}

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close(OBJDUMPDATA);

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close($objdumpdata);

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if (!defined($comment) || $comment !~ /GCC\:.*GCC\:/m) {

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if (!defined($comment) || $comment !~ /GCC\:.*GCC\:/m) {

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printf STDERR "No source file found for $fullname\n";

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printf STDERR "No source file found for $fullname\n";

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}

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}

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return;

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return;

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}

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}

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if (! open(NMDATA, "$nm $basename|")) {

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open (my $nmdata, "$nm $basename|")

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printf STDERR "$nm $fullname failed $!\n";

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or die "$nm $fullname failed $!\n";

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return;

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}

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my @nmdata;

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my @nmdata;

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while (<NMDATA>) {

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while (<$nmdata>) {

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chop;

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chop;

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($type, $name) = (split(/ +/, $_, 3))[1..2];

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($type, $name) = (split(/ +/, $_, 3))[1..2];

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# Expected types

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# Expected types

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# A absolute symbol

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# A absolute symbol

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# B weak external reference to data that has been resolved

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# B weak external reference to data that has been resolved

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# C global variable, uninitialised

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# C global variable, uninitialised

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# D global variable, initialised

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# D global variable, initialised

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# G global variable, initialised, small data section

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# G global variable, initialised, small data section

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# R global array, initialised

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# R global array, initialised

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# S global variable, uninitialised, small bss

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# S global variable, uninitialised, small bss

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# T global label/procedure

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# T global label/procedure

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# U external reference

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# U external reference

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# W weak external reference to text that has been resolved

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# W weak external reference to text that has been resolved

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# a assembler equate

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# a assembler equate

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# b static variable, uninitialised

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# b static variable, uninitialised

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# d static variable, initialised

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# d static variable, initialised

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# g static variable, initialised, small data section

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# g static variable, initialised, small data section

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# r static array, initialised

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# r static array, initialised

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# s static variable, uninitialised, small bss

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# s static variable, uninitialised, small bss

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# t static label/procedures

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# t static label/procedures

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# w weak external reference to text that has not been resolved

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# w weak external reference to text that has not been resolved

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# ? undefined type, used a lot by modules

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# ? undefined type, used a lot by modules

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if ($type !~ /^[ABCDGRSTUWabdgrstw?]$/) {

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if ($type !~ /^[ABCDGRSTUWabdgrstw?]$/) {

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printf STDERR "nm output for $fullname contains unknown type '$_'\n";

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printf STDERR "nm output for $fullname contains unknown type '$_'\n";

229

}

228

}

230

elsif ($name =~ /\./) {

229

elsif ($name =~ /\./) {

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# name with '.' is local static

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# name with '.' is local static

232

}

231

}

233

else {

232

else {

234

$type = 'R' if ($type eq '?'); # binutils replaced ? with R at one point

233

$type = 'R' if ($type eq '?'); # binutils replaced ? with R at one point

235

# binutils keeps changing the type for exported symbols, force it to R

234

# binutils keeps changing the type for exported symbols, force it to R

236

$type = 'R' if ($name =~ /^__ksymtab/ || $name =~ /^__kstrtab/);

235

$type = 'R' if ($name =~ /^__ksymtab/ || $name =~ /^__kstrtab/);

237

$name =~ s/_R[a-f0-9]{8}$//; # module versions adds this

236

$name =~ s/_R[a-f0-9]{8}$//; # module versions adds this

238

if ($type =~ /[ABCDGRSTW]/ &&

237

if ($type =~ /[ABCDGRSTW]/ &&

239

$name ne 'init_module' &&

238

$name ne 'init_module' &&

240

$name ne 'cleanup_module' &&

239

$name ne 'cleanup_module' &&

241

$name ne 'Using_Versions' &&

240

$name ne 'Using_Versions' &&

242

$name !~ /^Version_[0-9]+$/ &&

241

$name !~ /^Version_[0-9]+$/ &&

243

$name !~ /^__parm_/ &&

242

$name !~ /^__parm_/ &&

244

$name !~ /^__kstrtab/ &&

243

$name !~ /^__kstrtab/ &&

245

$name !~ /^__ksymtab/ &&

244

$name !~ /^__ksymtab/ &&

246

$name !~ /^__kcrctab_/ &&

245

$name !~ /^__kcrctab_/ &&

247

$name !~ /^__exitcall_/ &&

246

$name !~ /^__exitcall_/ &&

248

$name !~ /^__initcall_/ &&

247

$name !~ /^__initcall_/ &&

249

$name !~ /^__kdb_initcall_/ &&

248

$name !~ /^__kdb_initcall_/ &&

250

$name !~ /^__kdb_exitcall_/ &&

249

$name !~ /^__kdb_exitcall_/ &&

251

$name !~ /^__module_/ &&

250

$name !~ /^__module_/ &&

252

$name !~ /^__mod_/ &&

251

$name !~ /^__mod_/ &&

253

$name !~ /^__crc_/ &&

252

$name !~ /^__crc_/ &&

254

$name ne '__this_module' &&

253

$name ne '__this_module' &&

255

$name ne 'kernel_version') {

254

$name ne 'kernel_version') {

256

if (!exists($def{$name})) {

255

if (!exists($def{$name})) {

257

$def{$name} = [];

256

$def{$name} = [];

258

}

257

}

259

push(@{$def{$name}}, $fullname);

258

push(@{$def{$name}}, $fullname);

260

}

259

}

261

push(@nmdata, "$type $name");

260

push(@nmdata, "$type $name");

262

if ($name =~ /^__ksymtab_/) {

261

if ($name =~ /^__ksymtab_/) {

263

$name = substr($name, 10);

262

$name = substr($name, 10);

264

if (!exists($ksymtab{$name})) {

263

if (!exists($ksymtab{$name})) {

265

$ksymtab{$name} = [];

264

$ksymtab{$name} = [];

266

}

265

}

267

push(@{$ksymtab{$name}}, $fullname);

266

push(@{$ksymtab{$name}}, $fullname);

268

}

267

}

269

}

268

}

270

}

269

}

271

close(NMDATA);

270

close($nmdata);

271

272

if ($#nmdata < 0) {

272

if ($#nmdata < 0) {

273

if (

273

if (

274

$fullname ne "lib/brlock.o"

274

$fullname ne "lib/brlock.o"

275

&& $fullname ne "lib/dec_and_lock.o"

275

&& $fullname ne "lib/dec_and_lock.o"

276

&& $fullname ne "fs/xfs/xfs_macros.o"

276

&& $fullname ne "fs/xfs/xfs_macros.o"

277

&& $fullname ne "drivers/ide/ide-probe-mini.o"

277

&& $fullname ne "drivers/ide/ide-probe-mini.o"

278

&& $fullname ne "usr/initramfs_data.o"

278

&& $fullname ne "usr/initramfs_data.o"

279

&& $fullname ne "drivers/acpi/executer/exdump.o"

279

&& $fullname ne "drivers/acpi/executer/exdump.o"

280

&& $fullname ne "drivers/acpi/resources/rsdump.o"

280

&& $fullname ne "drivers/acpi/resources/rsdump.o"

281

&& $fullname ne "drivers/acpi/namespace/nsdumpdv.o"

281

&& $fullname ne "drivers/acpi/namespace/nsdumpdv.o"

282

&& $fullname ne "drivers/acpi/namespace/nsdump.o"

282

&& $fullname ne "drivers/acpi/namespace/nsdump.o"

283

&& $fullname ne "arch/ia64/sn/kernel/sn2/io.o"

283

&& $fullname ne "arch/ia64/sn/kernel/sn2/io.o"

284

&& $fullname ne "arch/ia64/kernel/gate-data.o"

284

&& $fullname ne "arch/ia64/kernel/gate-data.o"

285

&& $fullname ne "drivers/ieee1394/oui.o"

285

&& $fullname ne "drivers/ieee1394/oui.o"

286

&& $fullname ne "security/capability.o"

286

&& $fullname ne "security/capability.o"

287

&& $fullname ne "sound/core/wrappers.o"

287

&& $fullname ne "sound/core/wrappers.o"

288

&& $fullname ne "fs/ntfs/sysctl.o"

288

&& $fullname ne "fs/ntfs/sysctl.o"

289

&& $fullname ne "fs/jfs/jfs_debug.o"

289

&& $fullname ne "fs/jfs/jfs_debug.o"

290

) {

290

) {

291

printf "No nm data for $fullname\n";

291

printf "No nm data for $fullname\n";

292

}

292

}

293

return;

293

return;

294

}

294

}

295

$nmdata{$fullname} = \@nmdata;

295

$nmdata{$fullname} = \@nmdata;

296

}

296

}

297

298

sub drop_def

298

sub drop_def

299

{

299

{

300

my ($object, $name) = @_;

300

my ($object, $name) = @_;

301

my $nmdata = $nmdata{$object};

301

my $nmdata = $nmdata{$object};

302

my ($i, $j);

302

my ($i, $j);

303

for ($i = 0; $i <= $#{$nmdata}; ++$i) {

303

for ($i = 0; $i <= $#{$nmdata}; ++$i) {

304

if ($name eq (split(' ', $nmdata->[$i], 2))[1]) {

304

if ($name eq (split(' ', $nmdata->[$i], 2))[1]) {

305

splice(@{$nmdata{$object}}, $i, 1);

305

splice(@{$nmdata{$object}}, $i, 1);

306

my $def = $def{$name};

306

my $def = $def{$name};

307

for ($j = 0; $j < $#{$def{$name}}; ++$j) {

307

for ($j = 0; $j < $#{$def{$name}}; ++$j) {

308

if ($def{$name}[$j] eq $object) {

308

if ($def{$name}[$j] eq $object) {

309

splice(@{$def{$name}}, $j, 1);

309

splice(@{$def{$name}}, $j, 1);

310

}

310

}

311

}

311

}

312

last;

312

last;

313

}

313

}

314

}

314

}

315

}

315

}

316

317

sub list_multiply_defined

317

sub list_multiply_defined

318

{

318

{

319

my ($name, $module);

319

foreach my $name (keys(%def)) {

320

foreach $name (keys(%def)) {

321

if ($#{$def{$name}} > 0) {

320

if ($#{$def{$name}} > 0) {

322

# Special case for cond_syscall

321

# Special case for cond_syscall

323

if ($#{$def{$name}} == 1 && $name =~ /^sys_/ &&

322

if ($#{$def{$name}} == 1 && $name =~ /^sys_/ &&

324

($def{$name}[0] eq "kernel/sys.o" ||

323

($def{$name}[0] eq "kernel/sys.o" ||

325

$def{$name}[1] eq "kernel/sys.o")) {

324

$def{$name}[1] eq "kernel/sys.o")) {

326

&drop_def("kernel/sys.o", $name);

325

&drop_def("kernel/sys.o", $name);

327

next;

326

next;

328

}

327

}

329

# Special case for i386 entry code

328

# Special case for i386 entry code

330

if ($#{$def{$name}} == 1 && $name =~ /^__kernel_/ &&

329

if ($#{$def{$name}} == 1 && $name =~ /^__kernel_/ &&

331

$def{$name}[0] eq "arch/x86/kernel/vsyscall-int80_32.o" &&

330

$def{$name}[0] eq "arch/x86/kernel/vsyscall-int80_32.o" &&

332

$def{$name}[1] eq "arch/x86/kernel/vsyscall-sysenter_32.o") {

331

$def{$name}[1] eq "arch/x86/kernel/vsyscall-sysenter_32.o") {

333

&drop_def("arch/x86/kernel/vsyscall-sysenter_32.o", $name);

332

&drop_def("arch/x86/kernel/vsyscall-sysenter_32.o", $name);

334

next;

333

next;

335

}

334

}

335

336

printf "$name is multiply defined in :-\n";

336

printf "$name is multiply defined in :-\n";

337

foreach $module (@{$def{$name}}) {

337

foreach my $module (@{$def{$name}}) {

338

printf "\t$module\n";

338

printf "\t$module\n";

339

}

339

}

340

}

340

}

341

}

341

}

342

}

342

}

343

344

sub resolve_external_references

344

sub resolve_external_references

345

{

345

{

346

my ($object, $type, $name, $i, $j, $kstrtab, $ksymtab, $export);

346

my ($kstrtab, $ksymtab, $export);

347

printf "\n";

348

printf "\n";

348

foreach $object (keys(%nmdata)) {

349

foreach my $object (keys(%nmdata)) {

349

my $nmdata = $nmdata{$object};

350

my $nmdata = $nmdata{$object};

350

for ($i = 0; $i <= $#{$nmdata}; ++$i) {

351

for (my $i = 0; $i <= $#{$nmdata}; ++$i) {

351

($type, $name) = split(' ', $nmdata->[$i], 2);

352

my ($type, $name) = split(' ', $nmdata->[$i], 2);

352

if ($type eq "U" || $type eq "w") {

353

if ($type eq "U" || $type eq "w") {

353

if (exists($def{$name}) || exists($ksymtab{$name})) {

354

if (exists($def{$name}) || exists($ksymtab{$name})) {

354

# add the owning object to the nmdata

355

# add the owning object to the nmdata

355

$nmdata->[$i] = "$type $name $object";

356

$nmdata->[$i] = "$type $name $object";

356

# only count as a reference if it is not EXPORT_...

357

# only count as a reference if it is not EXPORT_...

357

$kstrtab = "R __kstrtab_$name";

358

$kstrtab = "R __kstrtab_$name";

358

$ksymtab = "R __ksymtab_$name";

359

$ksymtab = "R __ksymtab_$name";

359

$export = 0;

360

$export = 0;

360

for ($j = 0; $j <= $#{$nmdata}; ++$j) {

361

for (my $j = 0; $j <= $#{$nmdata}; ++$j) {

361

if ($nmdata->[$j] eq $kstrtab ||

362

if ($nmdata->[$j] eq $kstrtab ||

362

$nmdata->[$j] eq $ksymtab) {

363

$nmdata->[$j] eq $ksymtab) {

363

$export = 1;

364

$export = 1;

364

last;

365

last;

365

}

366

}

366

}

367

}

367

if ($export) {

368

if ($export) {

368

$export{$name} = "";

369

$export{$name} = "";

369

}

370

}

370

else {

371

else {

371

$ref{$name} = ""

372

$ref{$name} = ""

372

}

373

}

373

}

374

}

374

elsif ( $name ne "mod_use_count_"

375

elsif ( $name ne "mod_use_count_"

375

&& $name ne "__initramfs_end"

376

&& $name ne "__initramfs_end"

376

&& $name ne "__initramfs_start"

377

&& $name ne "__initramfs_start"

377

&& $name ne "_einittext"

378

&& $name ne "_einittext"

378

&& $name ne "_sinittext"

379

&& $name ne "_sinittext"

379

&& $name ne "kallsyms_names"

380

&& $name ne "kallsyms_names"

380

&& $name ne "kallsyms_num_syms"

381

&& $name ne "kallsyms_num_syms"

381

&& $name ne "kallsyms_addresses"

382

&& $name ne "kallsyms_addresses"

382

&& $name ne "__this_module"

383

&& $name ne "__this_module"

383

&& $name ne "_etext"

384

&& $name ne "_etext"

384

&& $name ne "_edata"

385

&& $name ne "_edata"

385

&& $name ne "_end"

386

&& $name ne "_end"

386

&& $name ne "__bss_start"

387

&& $name ne "__bss_start"

387

&& $name ne "_text"

388

&& $name ne "_text"

388

&& $name ne "_stext"

389

&& $name ne "_stext"

389

&& $name ne "__gp"

390

&& $name ne "__gp"

390

&& $name ne "ia64_unw_start"

391

&& $name ne "ia64_unw_start"

391

&& $name ne "ia64_unw_end"

392

&& $name ne "ia64_unw_end"

392

&& $name ne "__init_begin"

393

&& $name ne "__init_begin"

393

&& $name ne "__init_end"

394

&& $name ne "__init_end"

394

&& $name ne "__bss_stop"

395

&& $name ne "__bss_stop"

395

&& $name ne "__nosave_begin"

396

&& $name ne "__nosave_begin"

396

&& $name ne "__nosave_end"

397

&& $name ne "__nosave_end"

397

&& $name ne "pg0"

398

&& $name ne "pg0"

398

&& $name ne "__module_text_address"

399

&& $name ne "__module_text_address"

399

&& $name !~ /^__sched_text_/

400

&& $name !~ /^__sched_text_/

400

&& $name !~ /^__start_/

401

&& $name !~ /^__start_/

401

&& $name !~ /^__end_/

402

&& $name !~ /^__end_/

402

&& $name !~ /^__stop_/

403

&& $name !~ /^__stop_/

403

&& $name !~ /^__scheduling_functions_.*_here/

404

&& $name !~ /^__scheduling_functions_.*_here/

404

&& $name !~ /^__.*initcall_/

405

&& $name !~ /^__.*initcall_/

405

&& $name !~ /^__.*per_cpu_start/

406

&& $name !~ /^__.*per_cpu_start/

406

&& $name !~ /^__.*per_cpu_end/

407

&& $name !~ /^__.*per_cpu_end/

407

&& $name !~ /^__alt_instructions/

408

&& $name !~ /^__alt_instructions/

408

&& $name !~ /^__setup_/

409

&& $name !~ /^__setup_/

409

&& $name !~ /^jiffies/

410

&& $name !~ /^jiffies/

410

&& $name !~ /^__mod_timer/

411

&& $name !~ /^__mod_timer/

411

&& $name !~ /^__mod_page_state/

412

&& $name !~ /^__mod_page_state/

412

&& $name !~ /^init_module/

413

&& $name !~ /^init_module/

413

&& $name !~ /^cleanup_module/

414

&& $name !~ /^cleanup_module/

414

) {

415

) {

415

printf "Cannot resolve ";

416

printf "Cannot resolve ";

416

printf "weak " if ($type eq "w");

417

printf "weak " if ($type eq "w");

417

printf "reference to $name from $object\n";

418

printf "reference to $name from $object\n";

418

}

419

}

419

}

420

}

420

}

421

}

421

}

422

}

422

}

423

}

423

424

sub list_extra_externals

425

sub list_extra_externals

425

{

426

{

426

my %noref = ();

427

my %noref = ();

427

my ($name, @module, $module, $export);

428

foreach $name (keys(%def)) {

429

foreach my $name (keys(%def)) {

429

if (! exists($ref{$name})) {

430

if (! exists($ref{$name})) {

430

@module = @{$def{$name}};

431

my @module = @{$def{$name}};

431

foreach $module (@module) {

432

foreach my $module (@module) {

432

if (! exists($noref{$module})) {

433

if (! exists($noref{$module})) {

433

$noref{$module} = [];

434

$noref{$module} = [];

434

}

435

}

435

push(@{$noref{$module}}, $name);

436

push(@{$noref{$module}}, $name);

436

}

437

}

437

}

438

}

438

}

439

}

439

if (%noref) {

440

if (%noref) {

440

printf "\nExternally defined symbols with no external references\n";

441

printf "\nExternally defined symbols with no external references\n";

441

foreach $module (sort(keys(%noref))) {

442

foreach my $module (sort(keys(%noref))) {

442

printf " $module\n";

443

printf " $module\n";

443

foreach (sort(@{$noref{$module}})) {

444

foreach (sort(@{$noref{$module}})) {

444

if (exists($export{$_})) {

445

my $export;

445

$export = " (export only)";

446

if (exists($export{$_})) {

446

}

447

$export = " (export only)";

447

else {

448

} else {

448

$export = "";

449

$export = "";

449

}

450

}

450

printf " $_$export\n";

451

printf " $_$export\n";

451

}

452

}

452

}

453

}

GITLAB

Eric Lee / smarc-fsl-linux-kernel

namespace: perlcritic warnings