175 lines
5.2 KiB
Python
Executable file
175 lines
5.2 KiB
Python
Executable file
#!/usr/bin/python
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#
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# this tool is used to check that the syscall numbers that are in
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# SYSCALLS.TXT correspond to those found in the Linux kernel sources
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# for the arm and i386 architectures
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#
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import sys, re, string, os, commands
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from bionic_utils import *
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# change this if necessary
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syscalls_txt = "SYSCALLS.TXT"
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def usage():
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print "usage: checksyscalls [options] [kernel_headers_rootdir]"
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print " options: -v enable verbose mode"
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sys.exit(1)
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linux_root = None
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syscalls_file = None
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def parse_command_line(args):
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global linux_root, syscalls_file, verbose
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program = args[0]
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args = args[1:]
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while len(args) > 0 and args[0][0] == "-":
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option = args[0][1:]
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args = args[1:]
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if option == "v":
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D_setlevel(1)
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else:
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usage()
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if len(args) > 2:
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usage()
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if len(args) == 0:
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linux_root = find_kernel_headers()
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if linux_root == None:
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print "could not locate this system kernel headers root directory, please"
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print "specify one when calling this program, i.e. 'checksyscalls <headers-directory>'"
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sys.exit(1)
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print "using the following kernel headers root: '%s'" % linux_root
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else:
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linux_root = args[0]
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if not os.path.isdir(linux_root):
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print "the directory '%s' does not exist. aborting\n" % headers_root
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sys.exit(1)
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parse_command_line(sys.argv)
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syscalls_file = find_file_from_upwards(None, syscalls_txt)
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if not syscalls_file:
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print "could not locate the %s file. Aborting" % syscalls_txt
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sys.exit(1)
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print "parsing %s" % syscalls_file
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# read the syscalls description file
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#
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parser = SysCallsTxtParser()
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parser.parse_file(syscalls_file)
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syscalls = parser.syscalls
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re_nr_line = re.compile( r"#define __NR_(\w*)\s*\(__NR_SYSCALL_BASE\+\s*(\w*)\)" )
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re_nr_clock_line = re.compile( r"#define __NR_(\w*)\s*\(__NR_timer_create\+(\w*)\)" )
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re_arm_nr_line = re.compile( r"#define __ARM_NR_(\w*)\s*\(__ARM_NR_BASE\+\s*(\w*)\)" )
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re_x86_line = re.compile( r"#define __NR_(\w*)\s*([0-9]*)" )
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# now read the Linux arm header
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def process_nr_line(line,dict):
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m = re_nr_line.match(line)
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if m:
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dict[m.group(1)] = int(m.group(2))
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return
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m = re_nr_clock_line.match(line)
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if m:
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dict[m.group(1)] = int(m.group(2)) + 259
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return
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m = re_arm_nr_line.match(line)
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if m:
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#print "%s = %s" % (m.group(1), m.group(2))
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dict["ARM_"+m.group(1)] = int(m.group(2)) + 0x0f0000
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return
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m = re_x86_line.match(line)
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if m:
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# try block because the ARM header has some #define _NR_XXXXX /* nothing */
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try:
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#print "%s = %s" % (m.group(1), m.group(2))
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dict[m.group(1)] = int(m.group(2))
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except:
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pass
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return
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def process_header(header_file,dict):
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fp = open(header_file)
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D("reading "+header_file)
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for line in fp.xreadlines():
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line = line.strip()
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if not line: continue
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process_nr_line(line,dict)
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fp.close()
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arm_dict = {}
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x86_dict = {}
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# remove trailing slash and '/include' from the linux_root, if any
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if linux_root[-1] == '/':
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linux_root = linux_root[:-1]
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if len(linux_root) > 8 and linux_root[-8:] == '/include':
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linux_root = linux_root[:-8]
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arm_unistd = linux_root + "/include/asm-arm/unistd.h"
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if not os.path.exists(arm_unistd):
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print "WEIRD: could not locate the ARM unistd.h header file"
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print "tried searching in '%s'" % arm_unistd
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print "maybe using a different set of kernel headers might help"
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sys.exit(1)
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# on recent kernels, asm-i386 and asm-x64_64 have been merged into asm-x86
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# with two distinct unistd_32.h and unistd_64.h definition files.
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# take care of this here
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#
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x86_unistd = linux_root + "/include/asm-i386/unistd.h"
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if not os.path.exists(x86_unistd):
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x86_unistd1 = x86_unistd
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x86_unistd = linux_root + "/include/asm-x86/unistd_32.h"
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if not os.path.exists(x86_unistd):
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print "WEIRD: could not locate the i386/x86 unistd.h header file"
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print "tried searching in '%s' and '%s'" % (x86_unistd1, x86_unistd)
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print "maybe using a different set of kernel headers might help"
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sys.exit(1)
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process_header( linux_root+"/include/asm-arm/unistd.h", arm_dict )
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process_header( x86_unistd, x86_dict )
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# now perform the comparison
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errors = 0
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for sc in syscalls:
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sc_name = sc["name"]
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sc_id = sc["id"]
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if sc_id >= 0:
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if not arm_dict.has_key(sc_name):
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print "arm syscall %s not defined !!" % sc_name
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errors += 1
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elif arm_dict[sc_name] != sc_id:
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print "arm syscall %s should be %d instead of %d !!" % (sc_name, arm_dict[sc_name], sc_id)
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errors += 1
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for sc in syscalls:
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sc_name = sc["name"]
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sc_id2 = sc["id2"]
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if sc_id2 >= 0:
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if not x86_dict.has_key(sc_name):
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print "x86 syscall %s not defined !!" % sc_name
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errors += 1
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elif x86_dict[sc_name] != sc_id2:
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print "x86 syscall %s should be %d instead of %d !!" % (sc_name, x86_dict[sc_name], sc_id2)
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errors += 1
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if errors == 0:
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print "congratulations, everything's fine !!"
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else:
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print "correct %d errors !!" % errors
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