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      1 /* Low level interface to valgrind, for the remote server for GDB integrated
      2    in valgrind.
      3    Copyright (C) 2011
      4    Free Software Foundation, Inc.
      5 
      6    This file is part of VALGRIND.
      7    It has been inspired from a file from gdbserver in gdb 6.6.
      8 
      9    This program is free software; you can redistribute it and/or modify
     10    it under the terms of the GNU General Public License as published by
     11    the Free Software Foundation; either version 2 of the License, or
     12    (at your option) any later version.
     13 
     14    This program is distributed in the hope that it will be useful,
     15    but WITHOUT ANY WARRANTY; without even the implied warranty of
     16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     17    GNU General Public License for more details.
     18 
     19    You should have received a copy of the GNU General Public License
     20    along with this program; if not, write to the Free Software
     21    Foundation, Inc., 51 Franklin Street, Fifth Floor,
     22    Boston, MA 02110-1301, USA.  */
     23 
     24 #include "server.h"
     25 #include "target.h"
     26 #include "regdef.h"
     27 #include "regcache.h"
     28 
     29 #include "pub_core_aspacemgr.h"
     30 #include "pub_core_machine.h"
     31 #include "pub_core_threadstate.h"
     32 #include "pub_core_transtab.h"
     33 #include "pub_core_gdbserver.h"
     34 
     35 #include "valgrind_low.h"
     36 
     37 #include "libvex_guest_ppc32.h"
     38 
     39 /* this is only the basic set of registers.
     40    Need to look at what is the exact ppc32 model to support.
     41 */
     42 static struct reg regs[] = {
     43   { "r0", 0, 32 },
     44   { "r1", 32, 32 },
     45   { "r2", 64, 32 },
     46   { "r3", 96, 32 },
     47   { "r4", 128, 32 },
     48   { "r5", 160, 32 },
     49   { "r6", 192, 32 },
     50   { "r7", 224, 32 },
     51   { "r8", 256, 32 },
     52   { "r9", 288, 32 },
     53   { "r10", 320, 32 },
     54   { "r11", 352, 32 },
     55   { "r12", 384, 32 },
     56   { "r13", 416, 32 },
     57   { "r14", 448, 32 },
     58   { "r15", 480, 32 },
     59   { "r16", 512, 32 },
     60   { "r17", 544, 32 },
     61   { "r18", 576, 32 },
     62   { "r19", 608, 32 },
     63   { "r20", 640, 32 },
     64   { "r21", 672, 32 },
     65   { "r22", 704, 32 },
     66   { "r23", 736, 32 },
     67   { "r24", 768, 32 },
     68   { "r25", 800, 32 },
     69   { "r26", 832, 32 },
     70   { "r27", 864, 32 },
     71   { "r28", 896, 32 },
     72   { "r29", 928, 32 },
     73   { "r30", 960, 32 },
     74   { "r31", 992, 32 },
     75   { "f0", 1024, 64 },
     76   { "f1", 1088, 64 },
     77   { "f2", 1152, 64 },
     78   { "f3", 1216, 64 },
     79   { "f4", 1280, 64 },
     80   { "f5", 1344, 64 },
     81   { "f6", 1408, 64 },
     82   { "f7", 1472, 64 },
     83   { "f8", 1536, 64 },
     84   { "f9", 1600, 64 },
     85   { "f10", 1664, 64 },
     86   { "f11", 1728, 64 },
     87   { "f12", 1792, 64 },
     88   { "f13", 1856, 64 },
     89   { "f14", 1920, 64 },
     90   { "f15", 1984, 64 },
     91   { "f16", 2048, 64 },
     92   { "f17", 2112, 64 },
     93   { "f18", 2176, 64 },
     94   { "f19", 2240, 64 },
     95   { "f20", 2304, 64 },
     96   { "f21", 2368, 64 },
     97   { "f22", 2432, 64 },
     98   { "f23", 2496, 64 },
     99   { "f24", 2560, 64 },
    100   { "f25", 2624, 64 },
    101   { "f26", 2688, 64 },
    102   { "f27", 2752, 64 },
    103   { "f28", 2816, 64 },
    104   { "f29", 2880, 64 },
    105   { "f30", 2944, 64 },
    106   { "f31", 3008, 64 },
    107   { "pc", 3072, 32 },
    108   { "msr", 3104, 32 },
    109   { "cr", 3136, 32 },
    110   { "lr", 3168, 32 },
    111   { "ctr", 3200, 32 },
    112   { "xer", 3232, 32 },
    113   { "fpscr", 3264, 32 },
    114   { "orig_r3", 3296, 32 },
    115   { "trap", 3328, 32 },
    116   { "vr0", 3360, 128 },
    117   { "vr1", 3488, 128 },
    118   { "vr2", 3616, 128 },
    119   { "vr3", 3744, 128 },
    120   { "vr4", 3872, 128 },
    121   { "vr5", 4000, 128 },
    122   { "vr6", 4128, 128 },
    123   { "vr7", 4256, 128 },
    124   { "vr8", 4384, 128 },
    125   { "vr9", 4512, 128 },
    126   { "vr10", 4640, 128 },
    127   { "vr11", 4768, 128 },
    128   { "vr12", 4896, 128 },
    129   { "vr13", 5024, 128 },
    130   { "vr14", 5152, 128 },
    131   { "vr15", 5280, 128 },
    132   { "vr16", 5408, 128 },
    133   { "vr17", 5536, 128 },
    134   { "vr18", 5664, 128 },
    135   { "vr19", 5792, 128 },
    136   { "vr20", 5920, 128 },
    137   { "vr21", 6048, 128 },
    138   { "vr22", 6176, 128 },
    139   { "vr23", 6304, 128 },
    140   { "vr24", 6432, 128 },
    141   { "vr25", 6560, 128 },
    142   { "vr26", 6688, 128 },
    143   { "vr27", 6816, 128 },
    144   { "vr28", 6944, 128 },
    145   { "vr29", 7072, 128 },
    146   { "vr30", 7200, 128 },
    147   { "vr31", 7328, 128 },
    148   { "vscr", 7456, 32 },
    149   { "vrsave", 7488, 32 }
    150 };
    151 static const char *expedite_regs[] = { "r1", "pc", 0 };
    152 #define num_regs (sizeof (regs) / sizeof (regs[0]))
    153 
    154 static
    155 CORE_ADDR get_pc (void)
    156 {
    157    unsigned long pc;
    158 
    159    collect_register_by_name ("pc", &pc);
    160 
    161    dlog(1, "stop pc is %p\n", (void *) pc);
    162    return pc;
    163 }
    164 
    165 static
    166 void set_pc (CORE_ADDR newpc)
    167 {
    168    Bool mod;
    169    supply_register_by_name ("pc", &newpc, &mod);
    170    if (mod)
    171       dlog(1, "set pc to %p\n", C2v (newpc));
    172    else
    173       dlog(1, "set pc not changed %p\n", C2v (newpc));
    174 }
    175 
    176 /* store registers in the guest state (gdbserver_to_valgrind)
    177    or fetch register from the guest state (valgrind_to_gdbserver). */
    178 static
    179 void transfer_register (ThreadId tid, int abs_regno, void * buf,
    180                         transfer_direction dir, int size, Bool *mod)
    181 {
    182    ThreadState* tst = VG_(get_ThreadState)(tid);
    183    int set = abs_regno / num_regs;
    184    int regno = abs_regno % num_regs;
    185    *mod = False;
    186 
    187    VexGuestPPC32State* ppc32 = (VexGuestPPC32State*) get_arch (set, tst);
    188 
    189    switch (regno) {
    190    // numbers here have to match the order of regs above
    191    // Attention: gdb order does not match valgrind order.
    192    case 0:  VG_(transfer) (&ppc32->guest_GPR0,  buf, dir, size, mod); break;
    193    case 1:  VG_(transfer) (&ppc32->guest_GPR1,  buf, dir, size, mod); break;
    194    case 2:  VG_(transfer) (&ppc32->guest_GPR2,  buf, dir, size, mod); break;
    195    case 3:  VG_(transfer) (&ppc32->guest_GPR3,  buf, dir, size, mod); break;
    196    case 4:  VG_(transfer) (&ppc32->guest_GPR4,  buf, dir, size, mod); break;
    197    case 5:  VG_(transfer) (&ppc32->guest_GPR5,  buf, dir, size, mod); break;
    198    case 6:  VG_(transfer) (&ppc32->guest_GPR6,  buf, dir, size, mod); break;
    199    case 7:  VG_(transfer) (&ppc32->guest_GPR7,  buf, dir, size, mod); break;
    200    case 8:  VG_(transfer) (&ppc32->guest_GPR8,  buf, dir, size, mod); break;
    201    case 9:  VG_(transfer) (&ppc32->guest_GPR9,  buf, dir, size, mod); break;
    202    case 10: VG_(transfer) (&ppc32->guest_GPR10, buf, dir, size, mod); break;
    203    case 11: VG_(transfer) (&ppc32->guest_GPR11, buf, dir, size, mod); break;
    204    case 12: VG_(transfer) (&ppc32->guest_GPR12, buf, dir, size, mod); break;
    205    case 13: VG_(transfer) (&ppc32->guest_GPR13, buf, dir, size, mod); break;
    206    case 14: VG_(transfer) (&ppc32->guest_GPR14, buf, dir, size, mod); break;
    207    case 15: VG_(transfer) (&ppc32->guest_GPR15, buf, dir, size, mod); break;
    208    case 16: VG_(transfer) (&ppc32->guest_GPR16, buf, dir, size, mod); break;
    209    case 17: VG_(transfer) (&ppc32->guest_GPR17, buf, dir, size, mod); break;
    210    case 18: VG_(transfer) (&ppc32->guest_GPR18, buf, dir, size, mod); break;
    211    case 19: VG_(transfer) (&ppc32->guest_GPR19, buf, dir, size, mod); break;
    212    case 20: VG_(transfer) (&ppc32->guest_GPR20, buf, dir, size, mod); break;
    213    case 21: VG_(transfer) (&ppc32->guest_GPR21, buf, dir, size, mod); break;
    214    case 22: VG_(transfer) (&ppc32->guest_GPR22, buf, dir, size, mod); break;
    215    case 23: VG_(transfer) (&ppc32->guest_GPR23, buf, dir, size, mod); break;
    216    case 24: VG_(transfer) (&ppc32->guest_GPR24, buf, dir, size, mod); break;
    217    case 25: VG_(transfer) (&ppc32->guest_GPR25, buf, dir, size, mod); break;
    218    case 26: VG_(transfer) (&ppc32->guest_GPR26, buf, dir, size, mod); break;
    219    case 27: VG_(transfer) (&ppc32->guest_GPR27, buf, dir, size, mod); break;
    220    case 28: VG_(transfer) (&ppc32->guest_GPR28, buf, dir, size, mod); break;
    221    case 29: VG_(transfer) (&ppc32->guest_GPR29, buf, dir, size, mod); break;
    222    case 30: VG_(transfer) (&ppc32->guest_GPR30, buf, dir, size, mod); break;
    223    case 31: VG_(transfer) (&ppc32->guest_GPR31, buf, dir, size, mod); break;
    224    case 32: VG_(transfer) (&ppc32->guest_VSR0,  buf, dir, size, mod); break;
    225    case 33: VG_(transfer) (&ppc32->guest_VSR1,  buf, dir, size, mod); break;
    226    case 34: VG_(transfer) (&ppc32->guest_VSR2,  buf, dir, size, mod); break;
    227    case 35: VG_(transfer) (&ppc32->guest_VSR3,  buf, dir, size, mod); break;
    228    case 36: VG_(transfer) (&ppc32->guest_VSR4,  buf, dir, size, mod); break;
    229    case 37: VG_(transfer) (&ppc32->guest_VSR5,  buf, dir, size, mod); break;
    230    case 38: VG_(transfer) (&ppc32->guest_VSR6,  buf, dir, size, mod); break;
    231    case 39: VG_(transfer) (&ppc32->guest_VSR7,  buf, dir, size, mod); break;
    232    case 40: VG_(transfer) (&ppc32->guest_VSR8,  buf, dir, size, mod); break;
    233    case 41: VG_(transfer) (&ppc32->guest_VSR9,  buf, dir, size, mod); break;
    234    case 42: VG_(transfer) (&ppc32->guest_VSR10, buf, dir, size, mod); break;
    235    case 43: VG_(transfer) (&ppc32->guest_VSR11, buf, dir, size, mod); break;
    236    case 44: VG_(transfer) (&ppc32->guest_VSR12, buf, dir, size, mod); break;
    237    case 45: VG_(transfer) (&ppc32->guest_VSR13, buf, dir, size, mod); break;
    238    case 46: VG_(transfer) (&ppc32->guest_VSR14, buf, dir, size, mod); break;
    239    case 47: VG_(transfer) (&ppc32->guest_VSR15, buf, dir, size, mod); break;
    240    case 48: VG_(transfer) (&ppc32->guest_VSR16, buf, dir, size, mod); break;
    241    case 49: VG_(transfer) (&ppc32->guest_VSR17, buf, dir, size, mod); break;
    242    case 50: VG_(transfer) (&ppc32->guest_VSR18, buf, dir, size, mod); break;
    243    case 51: VG_(transfer) (&ppc32->guest_VSR19, buf, dir, size, mod); break;
    244    case 52: VG_(transfer) (&ppc32->guest_VSR20, buf, dir, size, mod); break;
    245    case 53: VG_(transfer) (&ppc32->guest_VSR21, buf, dir, size, mod); break;
    246    case 54: VG_(transfer) (&ppc32->guest_VSR22, buf, dir, size, mod); break;
    247    case 55: VG_(transfer) (&ppc32->guest_VSR23, buf, dir, size, mod); break;
    248    case 56: VG_(transfer) (&ppc32->guest_VSR24, buf, dir, size, mod); break;
    249    case 57: VG_(transfer) (&ppc32->guest_VSR25, buf, dir, size, mod); break;
    250    case 58: VG_(transfer) (&ppc32->guest_VSR26, buf, dir, size, mod); break;
    251    case 59: VG_(transfer) (&ppc32->guest_VSR27, buf, dir, size, mod); break;
    252    case 60: VG_(transfer) (&ppc32->guest_VSR28, buf, dir, size, mod); break;
    253    case 61: VG_(transfer) (&ppc32->guest_VSR29, buf, dir, size, mod); break;
    254    case 62: VG_(transfer) (&ppc32->guest_VSR30, buf, dir, size, mod); break;
    255    case 63: VG_(transfer) (&ppc32->guest_VSR31, buf, dir, size, mod); break;
    256    case 64: VG_(transfer) (&ppc32->guest_CIA,   buf, dir, size, mod); break;
    257    case 65: *mod = False; break; // VEX does not model Machine State Register
    258    case 66: {
    259       UInt cr = LibVEX_GuestPPC32_get_CR (ppc32);
    260       if (dir == valgrind_to_gdbserver) {
    261          VG_(transfer) (&cr, buf, dir, size, mod);
    262       } else {
    263          UInt newcr;
    264          VG_(transfer) (&newcr, buf, dir, size, mod);
    265          *mod = newcr != cr;
    266          LibVEX_GuestPPC32_put_CR (newcr, ppc32);
    267       }
    268       break;
    269    }
    270    case 67: VG_(transfer) (&ppc32->guest_LR,    buf, dir, size, mod); break;
    271    case 68: VG_(transfer) (&ppc32->guest_CTR,   buf, dir, size, mod); break;
    272    case 69: {
    273       UInt xer = LibVEX_GuestPPC32_get_XER (ppc32);
    274       if (dir == valgrind_to_gdbserver) {
    275          VG_(transfer) (&xer, buf, dir, size, mod);
    276       } else {
    277          UInt newxer;
    278          VG_(transfer) (&newxer, buf, dir, size, mod);
    279          *mod = newxer != xer;
    280          LibVEX_GuestPPC32_put_XER (newxer, ppc32);
    281       }
    282       break;
    283    }
    284    case 70:  VG_(transfer) (&ppc32->guest_FPROUND, buf, dir, size, mod); break;
    285    case 71:  *mod = False; break; // GDBTD???? VEX { "orig_r3", 3296, 32 },
    286    case 72:  *mod = False; break; // GDBTD???? VEX { "trap", 3328, 32 },
    287    case 73:  VG_(transfer) (&ppc32->guest_VSR32, buf, dir, size, mod); break;
    288    case 74:  VG_(transfer) (&ppc32->guest_VSR33, buf, dir, size, mod); break;
    289    case 75:  VG_(transfer) (&ppc32->guest_VSR34, buf, dir, size, mod); break;
    290    case 76:  VG_(transfer) (&ppc32->guest_VSR35, buf, dir, size, mod); break;
    291    case 77:  VG_(transfer) (&ppc32->guest_VSR36, buf, dir, size, mod); break;
    292    case 78:  VG_(transfer) (&ppc32->guest_VSR37, buf, dir, size, mod); break;
    293    case 79:  VG_(transfer) (&ppc32->guest_VSR38, buf, dir, size, mod); break;
    294    case 80:  VG_(transfer) (&ppc32->guest_VSR39, buf, dir, size, mod); break;
    295    case 81:  VG_(transfer) (&ppc32->guest_VSR40, buf, dir, size, mod); break;
    296    case 82:  VG_(transfer) (&ppc32->guest_VSR41, buf, dir, size, mod); break;
    297    case 83:  VG_(transfer) (&ppc32->guest_VSR42, buf, dir, size, mod); break;
    298    case 84:  VG_(transfer) (&ppc32->guest_VSR43, buf, dir, size, mod); break;
    299    case 85:  VG_(transfer) (&ppc32->guest_VSR44, buf, dir, size, mod); break;
    300    case 86:  VG_(transfer) (&ppc32->guest_VSR45, buf, dir, size, mod); break;
    301    case 87:  VG_(transfer) (&ppc32->guest_VSR46, buf, dir, size, mod); break;
    302    case 88:  VG_(transfer) (&ppc32->guest_VSR47, buf, dir, size, mod); break;
    303    case 89:  VG_(transfer) (&ppc32->guest_VSR48, buf, dir, size, mod); break;
    304    case 90:  VG_(transfer) (&ppc32->guest_VSR49, buf, dir, size, mod); break;
    305    case 91:  VG_(transfer) (&ppc32->guest_VSR50, buf, dir, size, mod); break;
    306    case 92:  VG_(transfer) (&ppc32->guest_VSR51, buf, dir, size, mod); break;
    307    case 93:  VG_(transfer) (&ppc32->guest_VSR52, buf, dir, size, mod); break;
    308    case 94:  VG_(transfer) (&ppc32->guest_VSR53, buf, dir, size, mod); break;
    309    case 95:  VG_(transfer) (&ppc32->guest_VSR54, buf, dir, size, mod); break;
    310    case 96:  VG_(transfer) (&ppc32->guest_VSR55, buf, dir, size, mod); break;
    311    case 97:  VG_(transfer) (&ppc32->guest_VSR56, buf, dir, size, mod); break;
    312    case 98:  VG_(transfer) (&ppc32->guest_VSR57, buf, dir, size, mod); break;
    313    case 99:  VG_(transfer) (&ppc32->guest_VSR58, buf, dir, size, mod); break;
    314    case 100: VG_(transfer) (&ppc32->guest_VSR59, buf, dir, size, mod); break;
    315    case 101: VG_(transfer) (&ppc32->guest_VSR60, buf, dir, size, mod); break;
    316    case 102: VG_(transfer) (&ppc32->guest_VSR61, buf, dir, size, mod); break;
    317    case 103: VG_(transfer) (&ppc32->guest_VSR62, buf, dir, size, mod); break;
    318    case 104: VG_(transfer) (&ppc32->guest_VSR63, buf, dir, size, mod); break;
    319    case 105: VG_(transfer) (&ppc32->guest_VSCR,  buf, dir, size, mod); break;
    320    case 106: VG_(transfer) (&ppc32->guest_VRSAVE, buf, dir, size, mod); break;
    321    default: vg_assert(0);
    322    }
    323 }
    324 
    325 static
    326 const char* target_xml (Bool shadow_mode)
    327 {
    328    if (shadow_mode) {
    329       return "powerpc-altivec32l-valgrind.xml";
    330    } else {
    331       return "powerpc-altivec32l.xml";
    332    }
    333 }
    334 
    335 static struct valgrind_target_ops low_target = {
    336    num_regs,
    337    regs,
    338    1, //r1
    339    transfer_register,
    340    get_pc,
    341    set_pc,
    342    "ppc32",
    343    target_xml
    344 };
    345 
    346 void ppc32_init_architecture (struct valgrind_target_ops *target)
    347 {
    348    *target = low_target;
    349    set_register_cache (regs, num_regs);
    350    gdbserver_expedite_regs = expedite_regs;
    351 }
    352 
    353