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Revision f701d860af381265639244fb84b07797fbb5efca authored by Linus Torvalds on 10 June 2017, 17:15:47 UTC, committed by Linus Torvalds on 10 June 2017, 17:15:47 UTC 
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
 
Pull perf fixes from Ingo Molnar:
 "This is mostly tooling fixes, plus an instruction pointer filtering
  fix.

  It's more fixes than usual - Arnaldo got back from a longer vacation
  and there was a backlog"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
  perf symbols: Kill dso__build_id_is_kmod()
  perf symbols: Keep DSO->symtab_type after decompress
  perf tests: Decompress kernel module before objdump
  perf tools: Consolidate error path in __open_dso()
  perf tools: Decompress kernel module when reading DSO data
  perf annotate: Use dso__decompress_kmodule_path()
  perf tools: Introduce dso__decompress_kmodule_{fd,path}
  perf tools: Fix a memory leak in __open_dso()
  perf annotate: Fix symbolic link of build-id cache
  perf/core: Drop kernel samples even though :u is specified
  perf script python: Remove dups in documentation examples
  perf script python: Updated trace_unhandled() signature
  perf script python: Fix wrong code snippets in documentation
  perf script: Fix documentation errors
  perf script: Fix outdated comment for perf-trace-python
  perf probe: Fix examples section of documentation
  perf report: Ensure the perf DSO mapping matches what libdw sees
  perf report: Include partial stacks unwound with libdw
  perf annotate: Add missing powerpc triplet
  perf test: Disable breakpoint signal tests for powerpc
  ...
2 parent s 9376906 + 47c1ded
Raw File
extract-vmlinux 
#!/bin/sh
# ----------------------------------------------------------------------
# extract-vmlinux - Extract uncompressed vmlinux from a kernel image
#
# Inspired from extract-ikconfig
# (c) 2009,2010 Dick Streefland <dick@streefland.net>
#
# (c) 2011      Corentin Chary <corentin.chary@gmail.com>
#
# Licensed under the GNU General Public License, version 2 (GPLv2).
# ----------------------------------------------------------------------

check_vmlinux()
{
	# Use readelf to check if it's a valid ELF
	# TODO: find a better to way to check that it's really vmlinux
	#       and not just an elf
	readelf -h $1 > /dev/null 2>&1 || return 1

	cat $1
	exit 0
}

try_decompress()
{
	# The obscure use of the "tr" filter is to work around older versions of
	# "grep" that report the byte offset of the line instead of the pattern.

	# Try to find the header ($1) and decompress from here
	for	pos in `tr "$1\n$2" "\n$2=" < "$img" | grep -abo "^$2"`
	do
		pos=${pos%%:*}
		tail -c+$pos "$img" | $3 > $tmp 2> /dev/null
		check_vmlinux $tmp
	done
}

# Check invocation:
me=${0##*/}
img=$1
if	[ $# -ne 1 -o ! -s "$img" ]
then
	echo "Usage: $me <kernel-image>" >&2
	exit 2
fi

# Prepare temp files:
tmp=$(mktemp /tmp/vmlinux-XXX)
trap "rm -f $tmp" 0

# Initial attempt for uncompressed images or objects:
check_vmlinux $img

# That didn't work, so retry after decompression.
try_decompress '\037\213\010' xy    gunzip
try_decompress '\3757zXZ\000' abcde unxz
try_decompress 'BZh'          xy    bunzip2
try_decompress '\135\0\0\0'   xxx   unlzma
try_decompress '\211\114\132' xy    'lzop -d'

# Bail out:
echo "$me: Cannot find vmlinux." >&2
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