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# common python utility routines for the Bionic tool scripts
import sys, os, commands, string
all_arches = [ "arm", "mips", "x86", "x86_64" ]
# basic debugging trace support
# call D_setlevel to set the verbosity level
# and D(), D2(), D3(), D4() to add traces
#
verbose = 0
def D(msg):
global verbose
if verbose > 0:
print msg
def D2(msg):
global verbose
if verbose >= 2:
print msg
def D3(msg):
global verbose
if verbose >= 3:
print msg
def D4(msg):
global verbose
if verbose >= 4:
print msg
def D_setlevel(level):
global verbose
verbose = level
# parser for the SYSCALLS.TXT file
#
class SysCallsTxtParser:
def __init__(self):
self.syscalls = []
self.lineno = 0
def E(self, msg):
print "%d: %s" % (self.lineno, msg)
def parse_line(self, line):
""" parse a syscall spec line.
line processing, format is
return type func_name[|alias_list][:syscall_name[:socketcall_id]] ( [paramlist] ) architecture_list
"""
pos_lparen = line.find('(')
E = self.E
if pos_lparen < 0:
E("missing left parenthesis in '%s'" % line)
return
pos_rparen = line.rfind(')')
if pos_rparen < 0 or pos_rparen <= pos_lparen:
E("missing or misplaced right parenthesis in '%s'" % line)
return
return_type = line[:pos_lparen].strip().split()
if len(return_type) < 2:
E("missing return type in '%s'" % line)
return
syscall_func = return_type[-1]
return_type = string.join(return_type[:-1],' ')
socketcall_id = -1
pos_colon = syscall_func.find(':')
if pos_colon < 0:
syscall_name = syscall_func
else:
if pos_colon == 0 or pos_colon+1 >= len(syscall_func):
E("misplaced colon in '%s'" % line)
return
# now find if there is a socketcall_id for a dispatch-type syscall
# after the optional 2nd colon
pos_colon2 = syscall_func.find(':', pos_colon + 1)
if pos_colon2 < 0:
syscall_name = syscall_func[pos_colon+1:]
syscall_func = syscall_func[:pos_colon]
else:
if pos_colon2+1 >= len(syscall_func):
E("misplaced colon2 in '%s'" % line)
return
syscall_name = syscall_func[(pos_colon+1):pos_colon2]
socketcall_id = int(syscall_func[pos_colon2+1:])
syscall_func = syscall_func[:pos_colon]
alias_delim = syscall_func.find('|')
if alias_delim > 0:
alias_list = syscall_func[alias_delim+1:].strip()
syscall_func = syscall_func[:alias_delim]
alias_delim = syscall_name.find('|')
if alias_delim > 0:
syscall_name = syscall_name[:alias_delim]
syscall_aliases = string.split(alias_list, ',')
else:
syscall_aliases = []
if pos_rparen > pos_lparen+1:
syscall_params = line[pos_lparen+1:pos_rparen].split(',')
params = string.join(syscall_params,',')
else:
syscall_params = []
params = "void"
t = {
"name" : syscall_name,
"func" : syscall_func,
"aliases" : syscall_aliases,
"params" : syscall_params,
"decl" : "%-15s %s (%s);" % (return_type, syscall_func, params),
"socketcall_id" : socketcall_id
}
# Parse the architecture list.
arch_list = line[pos_rparen+1:].strip()
if arch_list == "custom":
pass
elif arch_list == "all":
for arch in all_arches:
t[arch] = True
else:
for arch in string.split(arch_list, ','):
if arch in all_arches:
t[arch] = True
else:
E("invalid syscall architecture list in '%s'" % line)
return
self.syscalls.append(t)
global verbose
if verbose >= 2:
print t
def parse_file(self, file_path):
D2("parse_file: %s" % file_path)
fp = open(file_path)
for line in fp.xreadlines():
self.lineno += 1
line = line.strip()
if not line: continue
if line[0] == '#': continue
self.parse_line(line)
fp.close()
class StringOutput:
def __init__(self):
self.line = ""
def write(self,msg):
self.line += msg
D2("write '%s'" % msg)
def get(self):
return self.line
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