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880e4768c2
In commit1e4687aa47("binman: Use target-specific tools when cross-compiling"), a utility function was implemented to get preferred compilation tools using environment variables like CC and CROSS_COMPILE. Although it intended to provide custom default tools (same as those in the global Makefile) when no relevant variables were set (for example using "gcc" for "cc"), it is only doing so when CROSS_COMPILE is set and returning the literal name of the tool otherwise. Remove the check for an empty CROSS_COMPILE, which makes the function use it as an empty prefix to the custom defaults and return the intended executables. Fixes:1e4687aa47("binman: Use target-specific tools when cross-compiling") Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
578 lines
17 KiB
Python
578 lines
17 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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#
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# Copyright (c) 2016 Google, Inc
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#
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import glob
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import os
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import shutil
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import struct
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import sys
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import tempfile
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from patman import command
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from patman import tout
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# Output directly (generally this is temporary)
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outdir = None
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# True to keep the output directory around after exiting
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preserve_outdir = False
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# Path to the Chrome OS chroot, if we know it
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chroot_path = None
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# Search paths to use for Filename(), used to find files
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search_paths = []
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tool_search_paths = []
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# Tools and the packages that contain them, on debian
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packages = {
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'lz4': 'liblz4-tool',
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}
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# List of paths to use when looking for an input file
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indir = []
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def PrepareOutputDir(dirname, preserve=False):
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"""Select an output directory, ensuring it exists.
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This either creates a temporary directory or checks that the one supplied
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by the user is valid. For a temporary directory, it makes a note to
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remove it later if required.
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Args:
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dirname: a string, name of the output directory to use to store
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intermediate and output files. If is None - create a temporary
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directory.
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preserve: a Boolean. If outdir above is None and preserve is False, the
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created temporary directory will be destroyed on exit.
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Raises:
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OSError: If it cannot create the output directory.
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"""
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global outdir, preserve_outdir
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preserve_outdir = dirname or preserve
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if dirname:
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outdir = dirname
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if not os.path.isdir(outdir):
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try:
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os.makedirs(outdir)
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except OSError as err:
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raise CmdError("Cannot make output directory '%s': '%s'" %
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(outdir, err.strerror))
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tout.Debug("Using output directory '%s'" % outdir)
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else:
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outdir = tempfile.mkdtemp(prefix='binman.')
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tout.Debug("Using temporary directory '%s'" % outdir)
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def _RemoveOutputDir():
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global outdir
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shutil.rmtree(outdir)
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tout.Debug("Deleted temporary directory '%s'" % outdir)
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outdir = None
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def FinaliseOutputDir():
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global outdir, preserve_outdir
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"""Tidy up: delete output directory if temporary and not preserved."""
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if outdir and not preserve_outdir:
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_RemoveOutputDir()
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outdir = None
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def GetOutputFilename(fname):
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"""Return a filename within the output directory.
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Args:
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fname: Filename to use for new file
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Returns:
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The full path of the filename, within the output directory
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"""
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return os.path.join(outdir, fname)
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def GetOutputDir():
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"""Return the current output directory
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Returns:
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str: The output directory
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"""
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return outdir
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def _FinaliseForTest():
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"""Remove the output directory (for use by tests)"""
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global outdir
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if outdir:
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_RemoveOutputDir()
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outdir = None
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def SetInputDirs(dirname):
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"""Add a list of input directories, where input files are kept.
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Args:
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dirname: a list of paths to input directories to use for obtaining
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files needed by binman to place in the image.
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"""
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global indir
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indir = dirname
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tout.Debug("Using input directories %s" % indir)
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def GetInputFilename(fname, allow_missing=False):
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"""Return a filename for use as input.
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Args:
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fname: Filename to use for new file
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allow_missing: True if the filename can be missing
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Returns:
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fname, if indir is None;
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full path of the filename, within the input directory;
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None, if file is missing and allow_missing is True
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Raises:
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ValueError if file is missing and allow_missing is False
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"""
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if not indir or fname[:1] == '/':
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return fname
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for dirname in indir:
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pathname = os.path.join(dirname, fname)
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if os.path.exists(pathname):
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return pathname
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if allow_missing:
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return None
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raise ValueError("Filename '%s' not found in input path (%s) (cwd='%s')" %
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(fname, ','.join(indir), os.getcwd()))
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def GetInputFilenameGlob(pattern):
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"""Return a list of filenames for use as input.
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Args:
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pattern: Filename pattern to search for
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Returns:
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A list of matching files in all input directories
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"""
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if not indir:
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return glob.glob(fname)
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files = []
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for dirname in indir:
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pathname = os.path.join(dirname, pattern)
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files += glob.glob(pathname)
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return sorted(files)
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def Align(pos, align):
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if align:
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mask = align - 1
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pos = (pos + mask) & ~mask
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return pos
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def NotPowerOfTwo(num):
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return num and (num & (num - 1))
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def SetToolPaths(toolpaths):
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"""Set the path to search for tools
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Args:
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toolpaths: List of paths to search for tools executed by Run()
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"""
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global tool_search_paths
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tool_search_paths = toolpaths
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def PathHasFile(path_spec, fname):
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"""Check if a given filename is in the PATH
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Args:
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path_spec: Value of PATH variable to check
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fname: Filename to check
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Returns:
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True if found, False if not
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"""
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for dir in path_spec.split(':'):
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if os.path.exists(os.path.join(dir, fname)):
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return True
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return False
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def GetHostCompileTool(name):
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"""Get the host-specific version for a compile tool
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This checks the environment variables that specify which version of
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the tool should be used (e.g. ${HOSTCC}).
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The following table lists the host-specific versions of the tools
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this function resolves to:
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Compile Tool | Host version
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--------------+----------------
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as | ${HOSTAS}
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ld | ${HOSTLD}
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cc | ${HOSTCC}
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cpp | ${HOSTCPP}
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c++ | ${HOSTCXX}
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ar | ${HOSTAR}
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nm | ${HOSTNM}
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ldr | ${HOSTLDR}
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strip | ${HOSTSTRIP}
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objcopy | ${HOSTOBJCOPY}
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objdump | ${HOSTOBJDUMP}
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dtc | ${HOSTDTC}
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Args:
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name: Command name to run
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Returns:
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host_name: Exact command name to run instead
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extra_args: List of extra arguments to pass
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"""
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host_name = None
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extra_args = []
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if name in ('as', 'ld', 'cc', 'cpp', 'ar', 'nm', 'ldr', 'strip',
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'objcopy', 'objdump', 'dtc'):
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host_name, *host_args = env.get('HOST' + name.upper(), '').split(' ')
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elif name == 'c++':
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host_name, *host_args = env.get('HOSTCXX', '').split(' ')
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if host_name:
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return host_name, extra_args
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return name, []
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def GetTargetCompileTool(name, cross_compile=None):
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"""Get the target-specific version for a compile tool
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This first checks the environment variables that specify which
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version of the tool should be used (e.g. ${CC}). If those aren't
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specified, it checks the CROSS_COMPILE variable as a prefix for the
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tool with some substitutions (e.g. "${CROSS_COMPILE}gcc" for cc).
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The following table lists the target-specific versions of the tools
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this function resolves to:
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Compile Tool | First choice | Second choice
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--------------+----------------+----------------------------
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as | ${AS} | ${CROSS_COMPILE}as
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ld | ${LD} | ${CROSS_COMPILE}ld.bfd
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| | or ${CROSS_COMPILE}ld
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cc | ${CC} | ${CROSS_COMPILE}gcc
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cpp | ${CPP} | ${CROSS_COMPILE}gcc -E
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c++ | ${CXX} | ${CROSS_COMPILE}g++
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ar | ${AR} | ${CROSS_COMPILE}ar
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nm | ${NM} | ${CROSS_COMPILE}nm
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ldr | ${LDR} | ${CROSS_COMPILE}ldr
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strip | ${STRIP} | ${CROSS_COMPILE}strip
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objcopy | ${OBJCOPY} | ${CROSS_COMPILE}objcopy
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objdump | ${OBJDUMP} | ${CROSS_COMPILE}objdump
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dtc | ${DTC} | (no CROSS_COMPILE version)
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Args:
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name: Command name to run
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Returns:
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target_name: Exact command name to run instead
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extra_args: List of extra arguments to pass
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"""
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env = dict(os.environ)
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target_name = None
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extra_args = []
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if name in ('as', 'ld', 'cc', 'cpp', 'ar', 'nm', 'ldr', 'strip',
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'objcopy', 'objdump', 'dtc'):
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target_name, *extra_args = env.get(name.upper(), '').split(' ')
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elif name == 'c++':
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target_name, *extra_args = env.get('CXX', '').split(' ')
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if target_name:
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return target_name, extra_args
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if cross_compile is None:
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cross_compile = env.get('CROSS_COMPILE', '')
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if name in ('as', 'ar', 'nm', 'ldr', 'strip', 'objcopy', 'objdump'):
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target_name = cross_compile + name
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elif name == 'ld':
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try:
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if Run(cross_compile + 'ld.bfd', '-v'):
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target_name = cross_compile + 'ld.bfd'
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except:
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target_name = cross_compile + 'ld'
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elif name == 'cc':
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target_name = cross_compile + 'gcc'
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elif name == 'cpp':
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target_name = cross_compile + 'gcc'
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extra_args = ['-E']
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elif name == 'c++':
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target_name = cross_compile + 'g++'
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else:
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target_name = name
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return target_name, extra_args
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def Run(name, *args, **kwargs):
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"""Run a tool with some arguments
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This runs a 'tool', which is a program used by binman to process files and
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perhaps produce some output. Tools can be located on the PATH or in a
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search path.
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Args:
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name: Command name to run
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args: Arguments to the tool
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for_host: True to resolve the command to the version for the host
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for_target: False to run the command as-is, without resolving it
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to the version for the compile target
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Returns:
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CommandResult object
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"""
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try:
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binary = kwargs.get('binary')
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for_host = kwargs.get('for_host', False)
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for_target = kwargs.get('for_target', not for_host)
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env = None
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if tool_search_paths:
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env = dict(os.environ)
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env['PATH'] = ':'.join(tool_search_paths) + ':' + env['PATH']
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if for_target:
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name, extra_args = GetTargetCompileTool(name)
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args = tuple(extra_args) + args
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elif for_host:
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name, extra_args = GetHostCompileTool(name)
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args = tuple(extra_args) + args
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name = os.path.expanduser(name) # Expand paths containing ~
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all_args = (name,) + args
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result = command.RunPipe([all_args], capture=True, capture_stderr=True,
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env=env, raise_on_error=False, binary=binary)
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if result.return_code:
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raise Exception("Error %d running '%s': %s" %
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(result.return_code,' '.join(all_args),
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result.stderr))
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return result.stdout
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except:
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if env and not PathHasFile(env['PATH'], name):
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msg = "Please install tool '%s'" % name
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package = packages.get(name)
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if package:
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msg += " (e.g. from package '%s')" % package
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raise ValueError(msg)
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raise
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def Filename(fname):
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"""Resolve a file path to an absolute path.
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If fname starts with ##/ and chroot is available, ##/ gets replaced with
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the chroot path. If chroot is not available, this file name can not be
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resolved, `None' is returned.
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If fname is not prepended with the above prefix, and is not an existing
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file, the actual file name is retrieved from the passed in string and the
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search_paths directories (if any) are searched to for the file. If found -
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the path to the found file is returned, `None' is returned otherwise.
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Args:
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fname: a string, the path to resolve.
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Returns:
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Absolute path to the file or None if not found.
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"""
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if fname.startswith('##/'):
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if chroot_path:
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fname = os.path.join(chroot_path, fname[3:])
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else:
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return None
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# Search for a pathname that exists, and return it if found
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if fname and not os.path.exists(fname):
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for path in search_paths:
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pathname = os.path.join(path, os.path.basename(fname))
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if os.path.exists(pathname):
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return pathname
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# If not found, just return the standard, unchanged path
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return fname
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def ReadFile(fname, binary=True):
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"""Read and return the contents of a file.
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Args:
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fname: path to filename to read, where ## signifiies the chroot.
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Returns:
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data read from file, as a string.
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"""
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with open(Filename(fname), binary and 'rb' or 'r') as fd:
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data = fd.read()
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#self._out.Info("Read file '%s' size %d (%#0x)" %
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#(fname, len(data), len(data)))
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return data
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def WriteFile(fname, data, binary=True):
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"""Write data into a file.
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Args:
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fname: path to filename to write
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data: data to write to file, as a string
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"""
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#self._out.Info("Write file '%s' size %d (%#0x)" %
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#(fname, len(data), len(data)))
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with open(Filename(fname), binary and 'wb' or 'w') as fd:
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fd.write(data)
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def GetBytes(byte, size):
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"""Get a string of bytes of a given size
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Args:
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byte: Numeric byte value to use
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size: Size of bytes/string to return
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Returns:
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A bytes type with 'byte' repeated 'size' times
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"""
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return bytes([byte]) * size
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def ToBytes(string):
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"""Convert a str type into a bytes type
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Args:
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string: string to convert
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Returns:
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A bytes type
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"""
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return string.encode('utf-8')
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def ToString(bval):
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"""Convert a bytes type into a str type
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Args:
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bval: bytes value to convert
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Returns:
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Python 3: A bytes type
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Python 2: A string type
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"""
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return bval.decode('utf-8')
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def Compress(indata, algo, with_header=True):
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"""Compress some data using a given algorithm
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Note that for lzma this uses an old version of the algorithm, not that
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provided by xz.
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This requires 'lz4' and 'lzma_alone' tools. It also requires an output
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directory to be previously set up, by calling PrepareOutputDir().
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Args:
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indata: Input data to compress
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algo: Algorithm to use ('none', 'gzip', 'lz4' or 'lzma')
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Returns:
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Compressed data
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"""
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if algo == 'none':
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return indata
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fname = GetOutputFilename('%s.comp.tmp' % algo)
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WriteFile(fname, indata)
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if algo == 'lz4':
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data = Run('lz4', '--no-frame-crc', '-B4', '-5', '-c', fname,
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binary=True)
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# cbfstool uses a very old version of lzma
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elif algo == 'lzma':
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outfname = GetOutputFilename('%s.comp.otmp' % algo)
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Run('lzma_alone', 'e', fname, outfname, '-lc1', '-lp0', '-pb0', '-d8')
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data = ReadFile(outfname)
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elif algo == 'gzip':
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data = Run('gzip', '-c', fname, binary=True)
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else:
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raise ValueError("Unknown algorithm '%s'" % algo)
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if with_header:
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hdr = struct.pack('<I', len(data))
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data = hdr + data
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return data
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def Decompress(indata, algo, with_header=True):
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"""Decompress some data using a given algorithm
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Note that for lzma this uses an old version of the algorithm, not that
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provided by xz.
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This requires 'lz4' and 'lzma_alone' tools. It also requires an output
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directory to be previously set up, by calling PrepareOutputDir().
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Args:
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indata: Input data to decompress
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algo: Algorithm to use ('none', 'gzip', 'lz4' or 'lzma')
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Returns:
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Compressed data
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"""
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if algo == 'none':
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return indata
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if with_header:
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data_len = struct.unpack('<I', indata[:4])[0]
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indata = indata[4:4 + data_len]
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fname = GetOutputFilename('%s.decomp.tmp' % algo)
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with open(fname, 'wb') as fd:
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fd.write(indata)
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if algo == 'lz4':
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data = Run('lz4', '-dc', fname, binary=True)
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elif algo == 'lzma':
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outfname = GetOutputFilename('%s.decomp.otmp' % algo)
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Run('lzma_alone', 'd', fname, outfname)
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data = ReadFile(outfname, binary=True)
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elif algo == 'gzip':
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data = Run('gzip', '-cd', fname, binary=True)
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else:
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raise ValueError("Unknown algorithm '%s'" % algo)
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return data
|
|
|
|
CMD_CREATE, CMD_DELETE, CMD_ADD, CMD_REPLACE, CMD_EXTRACT = range(5)
|
|
|
|
IFWITOOL_CMDS = {
|
|
CMD_CREATE: 'create',
|
|
CMD_DELETE: 'delete',
|
|
CMD_ADD: 'add',
|
|
CMD_REPLACE: 'replace',
|
|
CMD_EXTRACT: 'extract',
|
|
}
|
|
|
|
def RunIfwiTool(ifwi_file, cmd, fname=None, subpart=None, entry_name=None):
|
|
"""Run ifwitool with the given arguments:
|
|
|
|
Args:
|
|
ifwi_file: IFWI file to operation on
|
|
cmd: Command to execute (CMD_...)
|
|
fname: Filename of file to add/replace/extract/create (None for
|
|
CMD_DELETE)
|
|
subpart: Name of sub-partition to operation on (None for CMD_CREATE)
|
|
entry_name: Name of directory entry to operate on, or None if none
|
|
"""
|
|
args = ['ifwitool', ifwi_file]
|
|
args.append(IFWITOOL_CMDS[cmd])
|
|
if fname:
|
|
args += ['-f', fname]
|
|
if subpart:
|
|
args += ['-n', subpart]
|
|
if entry_name:
|
|
args += ['-d', '-e', entry_name]
|
|
Run(*args)
|
|
|
|
def ToHex(val):
|
|
"""Convert an integer value (or None) to a string
|
|
|
|
Returns:
|
|
hex value, or 'None' if the value is None
|
|
"""
|
|
return 'None' if val is None else '%#x' % val
|
|
|
|
def ToHexSize(val):
|
|
"""Return the size of an object in hex
|
|
|
|
Returns:
|
|
hex value of size, or 'None' if the value is None
|
|
"""
|
|
return 'None' if val is None else '%#x' % len(val)
|