xv6-cs450/vectors.pl

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#!/usr/bin/perl -w
# Generate vectors.S, the trap/interrupt entry points.
# There has to be one entry point per interrupt number
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# since otherwise there's no way for trap() to discover
# the interrupt number.
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print "/* generated by vectors.pl */\n";
print "/* handlers */\n";
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print ".text\n";
print ".globl alltraps\n";
for(my $i = 0; $i < 256; $i++){
print ".globl vector$i\n";
print "vector$i:\n";
if(($i < 8 || $i > 14) && $i != 17){
print " pushl \$0\n";
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}
print " pushl \$$i\n";
print " jmp alltraps\n";
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}
print "\n/* vector table */\n";
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print ".data\n";
print ".globl vectors\n";
print "vectors:\n";
for(my $i = 0; $i < 256; $i++){
print " .long vector$i\n";
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}