1 files changed, 201 insertions, 15 deletions

diff --git a/scripts/markup_oops.pl b/scripts/markup_oops.pl
index 700a7a654a3f..528492bcba5b 100644
--- a/scripts/markup_oops.pl
+++ b/scripts/markup_oops.pl
@@ -1,4 +1,6 @@
-#!/usr/bin/perl -w
+#!/usr/bin/perl
+
+use File::Basename;
 
 # Copyright 2008, Intel Corporation
 #
@@ -13,23 +15,165 @@
 
 
 my $vmlinux_name = $ARGV[0];
-
+if (!defined($vmlinux_name)) {
+        my $kerver = `uname -r`;
+        chomp($kerver);
+        $vmlinux_name = "/lib/modules/$kerver/build/vmlinux";
+        print "No vmlinux specified, assuming $vmlinux_name\n";
+}
+my $filename = $vmlinux_name;
 #
 # Step 1: Parse the oops to find the EIP value
 #
 
 my $target = "0";
+my $function;
+my $module = "";
+my $func_offset = 0;
+my $vmaoffset = 0;
+
+my %regs;
+
+
+sub parse_x86_regs
+{
+        my ($line) = @_;
+        if ($line =~ /EAX: ([0-9a-f]+) EBX: ([0-9a-f]+) ECX: ([0-9a-f]+) EDX: ([0-9a-f]+)/) {
+                $regs{"%eax"} = $1;
+                $regs{"%ebx"} = $2;
+                $regs{"%ecx"} = $3;
+                $regs{"%edx"} = $4;
+        }
+        if ($line =~ /ESI: ([0-9a-f]+) EDI: ([0-9a-f]+) EBP: ([0-9a-f]+) ESP: ([0-9a-f]+)/) {
+                $regs{"%esi"} = $1;
+                $regs{"%edi"} = $2;
+                $regs{"%esp"} = $4;
+        }
+        if ($line =~ /RAX: ([0-9a-f]+) RBX: ([0-9a-f]+) RCX: ([0-9a-f]+)/) {
+                $regs{"%eax"} = $1;
+                $regs{"%ebx"} = $2;
+                $regs{"%ecx"} = $3;
+        }
+        if ($line =~ /RDX: ([0-9a-f]+) RSI: ([0-9a-f]+) RDI: ([0-9a-f]+)/) {
+                $regs{"%edx"} = $1;
+                $regs{"%esi"} = $2;
+                $regs{"%edi"} = $3;
+        }
+        if ($line =~ /RBP: ([0-9a-f]+) R08: ([0-9a-f]+) R09: ([0-9a-f]+)/) {
+                $regs{"%r08"} = $2;
+                $regs{"%r09"} = $3;
+        }
+        if ($line =~ /R10: ([0-9a-f]+) R11: ([0-9a-f]+) R12: ([0-9a-f]+)/) {
+                $regs{"%r10"} = $1;
+                $regs{"%r11"} = $2;
+                $regs{"%r12"} = $3;
+        }
+        if ($line =~ /R13: ([0-9a-f]+) R14: ([0-9a-f]+) R15: ([0-9a-f]+)/) {
+                $regs{"%r13"} = $1;
+                $regs{"%r14"} = $2;
+                $regs{"%r15"} = $3;
+        }
+}
+
+sub reg_name
+{
+        my ($reg) = @_;
+        $reg =~ s/r(.)x/e\1x/;
+        $reg =~ s/r(.)i/e\1i/;
+        $reg =~ s/r(.)p/e\1p/;
+        return $reg;
+}
+
+sub process_x86_regs
+{
+        my ($line, $cntr) = @_;
+        my $str = "";
+        if (length($line) < 40) {
+                return ""; # not an asm istruction
+        }
+
+        # find the arguments to the instruction
+        if ($line =~ /([0-9a-zA-Z\,\%\(\)\-\+]+)$/) {
+                $lastword = $1;
+        } else {
+                return "";
+        }
+
+        # we need to find the registers that get clobbered,
+        # since their value is no longer relevant for previous
+        # instructions in the stream.
+
+        $clobber = $lastword;
+        # first, remove all memory operands, they're read only
+        $clobber =~ s/\([a-z0-9\%\,]+\)//g;
+        # then, remove everything before the comma, thats the read part
+        $clobber =~ s/.*\,//g;
+
+        # if this is the instruction that faulted, we haven't actually done
+        # the write yet... nothing is clobbered.
+        if ($cntr == 0) {
+                $clobber = "";
+        }
+
+        foreach $reg (keys(%regs)) {
+                my $clobberprime = reg_name($clobber);
+                my $lastwordprime = reg_name($lastword);
+                my $val = $regs{$reg};
+                if ($val =~ /^[0]+$/) {
+                        $val = "0";
+                } else {
+                        $val =~ s/^0*//;
+                }
+
+                # first check if we're clobbering this register; if we do
+                # we print it with a =>, and then delete its value
+                if ($clobber =~ /$reg/ || $clobberprime =~ /$reg/) {
+                        if (length($val) > 0) {
+                                $str = $str . " $reg => $val ";
+                        }
+                        $regs{$reg} = "";
+                        $val = "";
+                }
+                # now check if we're reading this register
+                if ($lastword =~ /$reg/ || $lastwordprime =~ /$reg/) {
+                        if (length($val) > 0) {
+                                $str = $str . " $reg = $val ";
+                        }
+                }
+        }
+        return $str;
+}
+
+# parse the oops
 while (<STDIN>) {
-        if ($_ =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) {
+        my $line = $_;
+        if ($line =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) {
                 $target = $1;
         }
-}
+        if ($line =~ /RIP: 0010:\[\<([a-z0-9]+)\>\]/) {
+                $target = $1;
+        }
+        if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) {
+                $function = $1;
+                $func_offset = $2;
+        }
+        if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\]  \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) {
+                $function = $1;
+                $func_offset = $2;
+        }
 
-if ($target =~ /^f8/) {
-        print "This script does not work on modules ... \n";
-        exit;
+        # check if it's a module
+        if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) {
+                $module = $3;
+        }
+        if ($line =~ /RIP: 0010:\[\<[0-9a-f]+\>\]  \[\<[0-9a-f]+\>\] ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) {
+                $module = $3;
+        }
+        parse_x86_regs($line);
 }
 
+my $decodestart = hex($target) - hex($func_offset);
+my $decodestop = hex($target) + 8192;
 if ($target eq "0") {
         print "No oops found!\n";
         print "Usage: \n";
@@ -37,10 +181,34 @@ if ($target eq "0") {
         exit;
 }
 
+# if it's a module, we need to find the .ko file and calculate a load offset
+if ($module ne "") {
+        my $dir = dirname($filename);
+        $dir = $dir . "/";
+        my $mod = $module . ".ko";
+        my $modulefile = `find $dir -name $mod | head -1`;
+        chomp($modulefile);
+        $filename = $modulefile;
+        if ($filename eq "") {
+                print "Module .ko file for $module not found. Aborting\n";
+                exit;
+        }
+        # ok so we found the module, now we need to calculate the vma offset
+        open(FILE, "objdump -dS $filename |") || die "Cannot start objdump";
+        while (<FILE>) {
+                if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) {
+                        my $fu = $1;
+                        $vmaoffset = hex($target) - hex($fu) - hex($func_offset);
+                }
+        }
+        close(FILE);
+}
+
 my $counter = 0;
 my $state   = 0;
 my $center  = 0;
 my @lines;
+my @reglines;
 
 sub InRange {
         my ($address, $target) = @_;
@@ -59,9 +227,7 @@ sub InRange {
 # first, parse the input into the lines array, but to keep size down,
 # we only do this for 4Kb around the sweet spot
 
-my $filename;
-
-open(FILE, "objdump -dS $vmlinux_name |") || die "Cannot start objdump";
+open(FILE, "objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump";
 
 while (<FILE>) {
         my $line = $_;
@@ -147,16 +313,36 @@ while ($finish < $counter) {
 
 my $i;
 
-my $fulltext = "";
+
+# start annotating the registers in the asm.
+# this goes from the oopsing point back, so that the annotator
+# can track (opportunistically) which registers got written and
+# whos value no longer is relevant.
+
+$i = $center;
+while ($i >= $start) {
+        $reglines[$i] = process_x86_regs($lines[$i], $center - $i);
+        $i = $i - 1;
+}
+
 $i = $start;
 while ($i < $finish) {
+        my $line;
         if ($i == $center) {
-                $fulltext = $fulltext . "*$lines[$i]     <----- faulting instruction\n";
+                $line =  "*$lines[$i] ";
         } else {
-                $fulltext = $fulltext .  " $lines[$i]\n";
+                $line =  " $lines[$i] ";
+        }
+        print $line;
+        if (defined($reglines[$i]) && length($reglines[$i]) > 0) {
+                my $c = 60 - length($line);
+                while ($c > 0) { print " "; $c = $c - 1; };
+                print "| $reglines[$i]";
         }
+        if ($i == $center) {
+                print "<--- faulting instruction";
+        }
+        print "\n";
         $i = $i +1;
 }
 
-print $fulltext;
-