306 lines
8.7 KiB
Python
306 lines
8.7 KiB
Python
# common python utility routines for the Bionic tool scripts
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import sys, os, commands, string
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# support Bionic architectures, add new ones as appropriate
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#
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bionic_archs = [ "arm", "x86" ]
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# basic debugging trace support
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# call D_setlevel to set the verbosity level
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# and D(), D2(), D3(), D4() to add traces
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#
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verbose = 1
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def D(msg):
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global verbose
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if verbose > 0:
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print msg
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def D2(msg):
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global verbose
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if verbose >= 2:
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print msg
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def D3(msg):
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global verbose
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if verbose >= 3:
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print msg
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def D4(msg):
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global verbose
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if verbose >= 4:
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print msg
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def D_setlevel(level):
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global verbose
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verbose = level
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def find_dir_of(path):
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'''return the directory name of 'path', or "." if there is none'''
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# remove trailing slash
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if len(path) > 1 and path[-1] == '/':
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path = path[:-1]
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# find parent directory name
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d = os.path.dirname(path)
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if d == "":
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return "."
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else:
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return d
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# other stuff
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#
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#
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def find_file_from_upwards(from_path,target_file):
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"""find a file in the current directory or its parents. if 'from_path' is None,
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seach from the current program's directory"""
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path = from_path
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if path == None:
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path = find_dir_of(sys.argv[0])
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D("this script seems to be located in: %s" % path)
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while 1:
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if path == "":
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path = "."
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file = path + "/" + target_file
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D("probing "+file)
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if os.path.isfile(file):
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D("found %s in %s" % (target_file, path))
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return file
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if path == ".":
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break
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path = os.path.dirname(path)
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path = ""
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while 1:
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path = "../" + path
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file = path + target_file
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D("probing "+file)
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if os.path.isfile(file):
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D("found %s in %s" % (target_file, path))
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return file
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return None
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def find_bionic_root():
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'''find the root of the Bionic source tree. we check for the SYSCALLS.TXT file
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from the location of the current program's directory.'''
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# note that we can't use find_file_from_upwards() since we can't use os.path.abspath
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# that's because in some cases the p4 client is in a symlinked directory, and this
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# function will return the real path instead, which later creates problems when
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# p4 commands are issued
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#
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file = find_file_from_upwards(None, "SYSCALLS.TXT")
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if file:
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return os.path.dirname(file)
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else:
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return None
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def find_kernel_headers():
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"""try to find the directory containing the kernel headers for this machine"""
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status, version = commands.getstatusoutput( "uname -r" ) # get Linux kernel version
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if status != 0:
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D("could not execute 'uname -r' command properly")
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return None
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# get rid of the "-xenU" suffix that is found in Xen virtual machines
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if len(version) > 5 and version[-5:] == "-xenU":
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version = version[:-5]
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path = "/usr/src/linux-headers-" + version
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D("probing %s for kernel headers" % (path+"/include"))
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ret = os.path.isdir( path )
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if ret:
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D("found kernel headers in: %s" % (path + "/include"))
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return path
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return None
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# parser for the SYSCALLS.TXT file
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#
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class SysCallsTxtParser:
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def __init__(self):
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self.syscalls = []
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self.lineno = 0
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def E(msg):
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print "%d: %s" % (self.lineno, msg)
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def parse_line(self, line):
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""" parse a syscall spec line.
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line processing, format is
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return type func_name[:syscall_name[:call_id]] ( [paramlist] ) (syscall_number[,syscall_number_x86])|stub
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"""
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pos_lparen = line.find('(')
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E = self.E
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if pos_lparen < 0:
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E("missing left parenthesis in '%s'" % line)
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return
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pos_rparen = line.rfind(')')
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if pos_rparen < 0 or pos_rparen <= pos_lparen:
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E("missing or misplaced right parenthesis in '%s'" % line)
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return
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return_type = line[:pos_lparen].strip().split()
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if len(return_type) < 2:
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E("missing return type in '%s'" % line)
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return
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syscall_func = return_type[-1]
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return_type = string.join(return_type[:-1],' ')
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call_id = -1
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pos_colon = syscall_func.find(':')
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if pos_colon < 0:
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syscall_name = syscall_func
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else:
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if pos_colon == 0 or pos_colon+1 >= len(syscall_func):
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E("misplaced colon in '%s'" % line)
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return
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# now find if there is a call_id for a dispatch-type syscall
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# after the optional 2nd colon
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pos_colon2 = syscall_func.find(':', pos_colon + 1)
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if pos_colon2 < 0:
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syscall_name = syscall_func[pos_colon+1:]
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syscall_func = syscall_func[:pos_colon]
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else:
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if pos_colon2+1 >= len(syscall_func):
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E("misplaced colon2 in '%s'" % line)
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return
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syscall_name = syscall_func[(pos_colon+1):pos_colon2]
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call_id = int(syscall_func[pos_colon2+1:])
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syscall_func = syscall_func[:pos_colon]
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if pos_rparen > pos_lparen+1:
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syscall_params = line[pos_lparen+1:pos_rparen].split(',')
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params = string.join(syscall_params,',')
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else:
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syscall_params = []
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params = "void"
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number = line[pos_rparen+1:].strip()
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if number == "stub":
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syscall_id = -1
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syscall_id2 = -1
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else:
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try:
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if number[0] == '#':
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number = number[1:].strip()
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numbers = string.split(number,',')
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syscall_id = int(numbers[0])
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syscall_id2 = syscall_id
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if len(numbers) > 1:
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syscall_id2 = int(numbers[1])
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except:
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E("invalid syscall number in '%s'" % line)
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return
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t = { "id" : syscall_id,
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"id2" : syscall_id2,
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"cid" : call_id,
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"name" : syscall_name,
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"func" : syscall_func,
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"params" : syscall_params,
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"decl" : "%-15s %s (%s);" % (return_type, syscall_func, params) }
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self.syscalls.append(t)
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def parse_file(self, file_path):
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D2("parse_file: %s" % file_path)
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fp = open(file_path)
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for line in fp.xreadlines():
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self.lineno += 1
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line = line.strip()
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if not line: continue
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if line[0] == '#': continue
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self.parse_line(line)
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fp.close()
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class Output:
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def __init__(self,out=sys.stdout):
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self.out = out
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def write(self,msg):
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self.out.write(msg)
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def writeln(self,msg):
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self.out.write(msg)
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self.out.write("\n")
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class StringOutput:
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def __init__(self):
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self.line = ""
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def write(self,msg):
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self.line += msg
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D2("write '%s'" % msg)
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def writeln(self,msg):
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self.line += msg + '\n'
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D2("write '%s\\n'"% msg)
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def get(self):
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return self.line
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def create_file_path(path):
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dirs = []
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while 1:
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parent = os.path.dirname(path)
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if parent == "/":
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break
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dirs.append(parent)
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path = parent
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dirs.reverse()
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for dir in dirs:
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#print "dir %s" % dir
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if os.path.isdir(dir):
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continue
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os.mkdir(dir)
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def walk_source_files(paths,callback,args,excludes=[]):
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"""recursively walk a list of paths and files, only keeping the source files in directories"""
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for path in paths:
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if not os.path.isdir(path):
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callback(path,args)
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else:
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for root, dirs, files in os.walk(path):
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#print "w-- %s (ex: %s)" % (repr((root,dirs)), repr(excludes))
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if len(excludes):
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for d in dirs[:]:
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if d in excludes:
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dirs.remove(d)
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for f in files:
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r, ext = os.path.splitext(f)
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if ext in [ ".h", ".c", ".cpp", ".S" ]:
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callback( "%s/%s" % (root,f), args )
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def cleanup_dir(path):
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"""create a directory if needed, and ensure that it is totally empty
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by removing any existing content in it"""
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if not os.path.exists(path):
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os.mkdir(path)
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else:
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for root, dirs, files in os.walk(path, topdown=False):
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if root.endswith("kernel_headers/"):
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# skip 'kernel_headers'
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continue
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for name in files:
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os.remove(os.path.join(root, name))
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for name in dirs:
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os.rmdir(os.path.join(root, name))
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