gen_syscalls.py

import ctags, re, simplejson, sys, os
from ctags import CTags, TagEntry

# file generated by ctags --fields=afmikKlnsStz --c-kinds=+pc -R
tags = CTags('tags')
entry = TagEntry()

sct_file = open('arch/x86/kernel/syscall_table_32.S', 'r')

sys_calls = []
i = 0

for line in sct_file:
	name = re.search(".long (\w*)", line)
	if(name):
		name = name.group(1)
		is_ptregs = False
		if(name == "sys_ni_syscall"):
			sys_calls.append([i, "not implemented", "", "%0#4x"%(i), "", "", "", "", "", "", ""])
			i += 1
			continue
		# take care of ptregs
		elif(name.find('ptregs_') == 0):
			name = name.replace("ptregs_", "sys_")
			is_ptregs = True
		if tags.find(entry, name, ctags.TAG_FULLMATCH | ctags.TAG_OBSERVECASE):
			found_sym = False
			while(not found_sym):
				if(entry['kind'] == 'prototype'):
					found_sym = True
					details = [i, name, entry['signature']]
					if(entry['signature'] != "(void)"):
						sig = entry['signature'].strip('()').split(',')
					else:
						sig = [];
					regs = {};
					details.append("%0#4x"%(i));
					if(len(sig) < 6):
						for param in sig:
							par = param.strip()
							par_def = None

							if(param.find("struct") != -1):
								type_match = re.search("struct (\w+)", param)
								if(type_match):
									par_entry = TagEntry()
									if(tags.find(par_entry, type_match.group(1), ctags.TAG_FULLMATCH|ctags.TAG_OBSERVECASE)):
										if(par_entry['kind'] == 'struct'):
											par_def = {'file': par_entry['file'], 'line': int(par_entry['lineNumber'])}
							details.append({'type': par, 'def': par_def})
					else:
						details.append("param addr*")
					remaining = 9 - len(details)
					for x in range(0, remaining):
						details.append("")
					# try to get the line now
					if(not is_ptregs):
						pattern = "SYSCALL_DEFINE%d(%s"%(len(sig), name.replace("sys_", ""))
						search = "SYSCALL_DEFINE%d"%(len(sig))
					else:
						pattern = name
						search = name
					if tags.find(entry, search, ctags.TAG_FULLMATCH | ctags.TAG_OBSERVECASE):
						found = False
						while(found == False):
							if(entry['pattern'].find(pattern) == 2):
								#details['found'] = entry['pattern']
								details.append(entry['file'])
								details.append(int(entry['lineNumber']))
								found = True
								break
							if(not tags.findNext(entry)):
								details.append("not found")
								details.append("")
								break
					else:
						details.append("not found")
						details.append("")
					sys_calls.append(details)
				else:
					if(not tags.findNext(entry)):
						sys_calls.append([i, "", "", "", "", "", "", "", "", "", ""])
						break
		i += 1

print simplejson.dumps({'aaData': sys_calls}, indent="   ")