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author | Mark Brown <broonie@kernel.org> | 2014-11-22 11:07:49 +0000 |
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committer | Mark Brown <broonie@kernel.org> | 2014-11-22 11:07:49 +0000 |
commit | 7280e4222be4e88e2e8dd3cf797f093ffaebfb8b (patch) | |
tree | 0c70042dff00ef136c449ae922e48b660b17c272 /arch/x86/tools/calc_run_size.pl | |
parent | 3070bdc3c302c80996502639e03a2e550571e152 (diff) | |
parent | 1f0f80ecae848b0ca2ca632e94568721494f09f0 (diff) |
Merge branch 'linux-linaro-lsk-v3.14' into linux-linaro-lsk-v3.14-androidlsk-v3.14-android-14.11
Diffstat (limited to 'arch/x86/tools/calc_run_size.pl')
-rw-r--r-- | arch/x86/tools/calc_run_size.pl | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/tools/calc_run_size.pl b/arch/x86/tools/calc_run_size.pl new file mode 100644 index 000000000000..0b0b124d3ece --- /dev/null +++ b/arch/x86/tools/calc_run_size.pl @@ -0,0 +1,30 @@ +#!/usr/bin/perl +# +# Calculate the amount of space needed to run the kernel, including room for +# the .bss and .brk sections. +# +# Usage: +# objdump -h a.out | perl calc_run_size.pl +use strict; + +my $mem_size = 0; +my $file_offset = 0; + +my $sections=" *[0-9]+ \.(?:bss|brk) +"; +while (<>) { + if (/^$sections([0-9a-f]+) +(?:[0-9a-f]+ +){2}([0-9a-f]+)/) { + my $size = hex($1); + my $offset = hex($2); + $mem_size += $size; + if ($file_offset == 0) { + $file_offset = $offset; + } elsif ($file_offset != $offset) { + die ".bss and .brk lack common file offset\n"; + } + } +} + +if ($file_offset == 0) { + die "Never found .bss or .brk file offset\n"; +} +printf("%d\n", $mem_size + $file_offset); |