hw/arm/virt: parameter passing cleanups
[qemu.git] / scripts / disas-objdump.pl
1 #!/usr/bin/perl -w
2
3 use File::Temp qw/ tempfile /;
4 use Getopt::Long;
5
6 # Default to the system objdump if a cross-compiler edition not given.
7 my $aobjdump = "objdump";
8 my $hobjdump = "";
9 my $tobjdump = "";
10 my $hmachine = "";
11 my $tmachine = "";
12
13 GetOptions ('O|objdump=s' => \$aobjdump,
14 'host-objdump=s' => \$hobjdump,
15 'target-objdump=s' => \$tobjdump,
16 'h|host-machine=s' => \$hmachine,
17 't|target-machine=s' => \$tmachine);
18
19 # But we can't default the machines. Sanity check that we've at least one.
20 die "No host or target machine type" if !$hmachine && !$tmachine;
21
22 # Reuse one temp file for all of the hunks.
23 my ($outh, $outname) = tempfile();
24 binmode($outh);
25 END { unlink $outname; }
26
27 # Pre-construct the command-lines for executing the dump.
28 sub mkobjcommand ($$) {
29 my ($cmd, $mach) = @_;
30 return 0 if !$mach;
31 $cmd = $aobjdump if !$cmd;
32 return "$cmd -m $mach --disassemble-all -b binary";
33 }
34
35 $objdump[1] = mkobjcommand($hobjdump, $hmachine);
36 $objdump[2] = mkobjcommand($tobjdump, $tmachine);
37
38 # Zero-initialize current dumping state.
39 my $mem = "";
40 my $inobjd = 0;
41 my $vma = 0;
42
43 sub objcommand {
44 my $ret = $objdump[$inobjd];
45 if (!$ret) {
46 die "Host machine type not specified" if $inobjd == 1;
47 die "Target machine type not specified" if $inobjd == 2;
48 die "Internal error";
49 }
50 return $ret;
51 }
52
53 while (<>) {
54 # Collect the data from the relevant OBJD-* lines ...
55 if (/^OBJD-H: /) {
56 die "Internal error" if $inobjd == 2;
57 $mem = $mem . pack("H*", substr($_, 8, -1));
58 $inobjd = 1;
59 } elsif (/^OBJD-T: /) {
60 die "Internal error" if $inobjd == 1;
61 $mem = $mem . pack("H*", substr($_, 8, -1));
62 $inobjd = 2;
63 }
64 # ... which will always be followed by a blank line,
65 # at which point we should produce our dump.
66 elsif ($inobjd) {
67 # Rewrite the temp file in one go; it will usually be small.
68 sysseek $outh, 0, 0;
69 truncate $outh, 0;
70 syswrite $outh, $mem;
71
72 my $cmd = objcommand();
73 $cmd = $cmd . " --adjust-vma=" . $vma if $vma;
74 $cmd = $cmd . " " . $outname;
75
76 # Pipe from objdump...
77 open IN, "-|", $cmd;
78
79 # ... copying all but the first 7 lines of boilerplate to our stdout.
80 my $i = 0;
81 while (<IN>) {
82 print if (++$i > 7);
83 }
84 close IN;
85 print "\n";
86
87 $mem = "";
88 $inobjd = 0;
89 $vma = 0;
90 }
91 # The line before "OBJD-*" will be of the form "0x<hex>+: +\n".
92 # Extract the value for passing to --adjust-vma.
93 elsif (/^(0x[0-9a-fA-F]+):\s*$/) {
94 $vma = $1;
95 print;
96 } else {
97 print;
98 }
99 }