cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

gen_op_regs.py (3844B)

      1#!/usr/bin/env python3
      2
      3##
      4##  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
      5##
      6##  This program is free software; you can redistribute it and/or modify
      7##  it under the terms of the GNU General Public License as published by
      8##  the Free Software Foundation; either version 2 of the License, or
      9##  (at your option) any later version.
     10##
     11##  This program is distributed in the hope that it will be useful,
     12##  but WITHOUT ANY WARRANTY; without even the implied warranty of
     13##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14##  GNU General Public License for more details.
     15##
     16##  You should have received a copy of the GNU General Public License
     17##  along with this program; if not, see <http://www.gnu.org/licenses/>.
     18##
     19
     20import sys
     21import re
     22import string
     23import hex_common
     24
     25##
     26##     Generate the register and immediate operands for each instruction
     27##
     28def calculate_regid_reg(tag):
     29    def letter_inc(x): return chr(ord(x)+1)
     30    ordered_implregs = [ 'SP','FP','LR' ]
     31    srcdst_lett = 'X'
     32    src_lett = 'S'
     33    dst_lett = 'D'
     34    retstr = ""
     35    mapdict = {}
     36    for reg in ordered_implregs:
     37        reg_rd = 0
     38        reg_wr = 0
     39        if ('A_IMPLICIT_WRITES_'+reg) in hex_common.attribdict[tag]: reg_wr = 1
     40        if reg_rd and reg_wr:
     41            retstr += srcdst_lett
     42            mapdict[srcdst_lett] = reg
     43            srcdst_lett = letter_inc(srcdst_lett)
     44        elif reg_rd:
     45            retstr += src_lett
     46            mapdict[src_lett] = reg
     47            src_lett = letter_inc(src_lett)
     48        elif reg_wr:
     49            retstr += dst_lett
     50            mapdict[dst_lett] = reg
     51            dst_lett = letter_inc(dst_lett)
     52    return retstr,mapdict
     53
     54def calculate_regid_letters(tag):
     55    retstr,mapdict = calculate_regid_reg(tag)
     56    return retstr
     57
     58def strip_reg_prefix(x):
     59    y=x.replace('UREG.','')
     60    y=y.replace('MREG.','')
     61    return y.replace('GREG.','')
     62
     63def main():
     64    hex_common.read_semantics_file(sys.argv[1])
     65    hex_common.read_attribs_file(sys.argv[2])
     66    tagregs = hex_common.get_tagregs()
     67    tagimms = hex_common.get_tagimms()
     68
     69    with open(sys.argv[3], 'w') as f:
     70        for tag in hex_common.tags:
     71            regs = tagregs[tag]
     72            rregs = []
     73            wregs = []
     74            regids = ""
     75            for regtype,regid,toss,numregs in regs:
     76                if hex_common.is_read(regid):
     77                    if regid[0] not in regids: regids += regid[0]
     78                    rregs.append(regtype+regid+numregs)
     79                if hex_common.is_written(regid):
     80                    wregs.append(regtype+regid+numregs)
     81                    if regid[0] not in regids: regids += regid[0]
     82            for attrib in hex_common.attribdict[tag]:
     83                if hex_common.attribinfo[attrib]['rreg']:
     84                    rregs.append(strip_reg_prefix(attribinfo[attrib]['rreg']))
     85                if hex_common.attribinfo[attrib]['wreg']:
     86                    wregs.append(strip_reg_prefix(attribinfo[attrib]['wreg']))
     87            regids += calculate_regid_letters(tag)
     88            f.write('REGINFO(%s,"%s",\t/*RD:*/\t"%s",\t/*WR:*/\t"%s")\n' % \
     89                (tag,regids,",".join(rregs),",".join(wregs)))
     90
     91        for tag in hex_common.tags:
     92            imms = tagimms[tag]
     93            f.write( 'IMMINFO(%s' % tag)
     94            if not imms:
     95                f.write(''','u',0,0,'U',0,0''')
     96            for sign,size,shamt in imms:
     97                if sign == 'r': sign = 's'
     98                if not shamt:
     99                    shamt = "0"
    100                f.write(''','%s',%s,%s''' % (sign,size,shamt))
    101            if len(imms) == 1:
    102                if sign.isupper():
    103                    myu = 'u'
    104                else:
    105                    myu = 'U'
    106                f.write(''','%s',0,0''' % myu)
    107            f.write(')\n')
    108
    109if __name__ == "__main__":
    110    main()