dlls/dbghelp/cpu_arm64.c

   1 /*
   2  * File cpu_arm64.c
   3  *
   4  * Copyright (C) 2009 Eric Pouech
   5  * Copyright (C) 2010-2013 André Hentschel
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <assert.h>
  23
  24 #include "ntstatus.h"
  25 #define WIN32_NO_STATUS
  26 #include "dbghelp_private.h"
  27 #include "winternl.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
  31
  32 static BOOL arm64_get_addr(HANDLE hThread, const CONTEXT* ctx,
  33                            enum cpu_addr ca, ADDRESS64* addr)
  34 {
  35     addr->Mode    = AddrModeFlat;
  36     addr->Segment = 0; /* don't need segment */
  37     switch (ca)
  38     {
  39 #ifdef __aarch64__
  40     case cpu_addr_pc:    addr->Offset = ctx->Pc;  return TRUE;
  41     case cpu_addr_stack: addr->Offset = ctx->Sp;  return TRUE;
  42     case cpu_addr_frame: addr->Offset = ctx->Fp; return TRUE;
  43 #endif
  44     default: addr->Mode = -1;
  45         return FALSE;
  46     }
  47 }
  48
  49 #ifdef __aarch64__
  50 enum st_mode {stm_start, stm_arm64, stm_done};
  51
  52 /* indexes in Reserved array */
  53 #define __CurrentModeCount      0
  54
  55 #define curr_mode   (frame->Reserved[__CurrentModeCount] & 0x0F)
  56 #define curr_count  (frame->Reserved[__CurrentModeCount] >> 4)
  57
  58 #define set_curr_mode(m) {frame->Reserved[__CurrentModeCount] &= ~0x0F; frame->Reserved[__CurrentModeCount] |= (m & 0x0F);}
  59 #define inc_curr_count() (frame->Reserved[__CurrentModeCount] += 0x10)
  60
  61 /* fetch_next_frame()
  62  *
  63  * modify (at least) context.Pc using unwind information
  64  * either out of debug info (dwarf), or simple Lr trace
  65  */
  66 static BOOL fetch_next_frame(struct cpu_stack_walk* csw,
  67                                CONTEXT* context, DWORD_PTR curr_pc)
  68 {
  69     DWORD_PTR               xframe;
  70     DWORD_PTR               oldReturn = context->Lr;
  71
  72     if (dwarf2_virtual_unwind(csw, curr_pc, context, &xframe))
  73     {
  74         context->Sp = xframe;
  75         context->Pc = oldReturn;
  76         return TRUE;
  77     }
  78
  79     if (context->Pc == context->Lr) return FALSE;
  80     context->Pc = oldReturn;
  81
  82     return TRUE;
  83 }
  84
  85 static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CONTEXT* context)
  86 {
  87     unsigned deltapc = curr_count <= 1 ? 0 : 4;
  88
  89     /* sanity check */
  90     if (curr_mode >= stm_done) return FALSE;
  91
  92     TRACE("Enter: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s\n",
  93           wine_dbgstr_addr(&frame->AddrPC),
  94           wine_dbgstr_addr(&frame->AddrFrame),
  95           wine_dbgstr_addr(&frame->AddrReturn),
  96           wine_dbgstr_addr(&frame->AddrStack),
  97           curr_mode == stm_start ? "start" : "ARM64",
  98           wine_dbgstr_longlong(curr_count));
  99
 100     if (curr_mode == stm_start)
 101     {
 102         /* Init done */
 103         set_curr_mode(stm_arm64);
 104         frame->AddrReturn.Mode = frame->AddrStack.Mode = AddrModeFlat;
 105         /* don't set up AddrStack on first call. Either the caller has set it up, or
 106          * we will get it in the next frame
 107          */
 108         memset(&frame->AddrBStore, 0, sizeof(frame->AddrBStore));
 109     }
 110     else
 111     {
 112         if (context->Sp != frame->AddrStack.Offset) FIXME("inconsistent Stack Pointer\n");
 113         if (context->Pc != frame->AddrPC.Offset) FIXME("inconsistent Program Counter\n");
 114
 115         if (frame->AddrReturn.Offset == 0) goto done_err;
 116         if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc))
 117             goto done_err;
 118     }
 119
 120     memset(&frame->Params, 0, sizeof(frame->Params));
 121
 122     /* set frame information */
 123     frame->AddrStack.Offset = context->Sp;
 124     frame->AddrReturn.Offset = context->Lr;
 125     frame->AddrFrame.Offset = context->Fp;
 126     frame->AddrPC.Offset = context->Pc;
 127
 128     frame->Far = TRUE;
 129     frame->Virtual = TRUE;
 130     inc_curr_count();
 131
 132     TRACE("Leave: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s FuncTable=%p\n",
 133           wine_dbgstr_addr(&frame->AddrPC),
 134           wine_dbgstr_addr(&frame->AddrFrame),
 135           wine_dbgstr_addr(&frame->AddrReturn),
 136           wine_dbgstr_addr(&frame->AddrStack),
 137           curr_mode == stm_start ? "start" : "ARM64",
 138           wine_dbgstr_longlong(curr_count),
 139           frame->FuncTableEntry);
 140
 141     return TRUE;
 142 done_err:
 143     set_curr_mode(stm_done);
 144     return FALSE;
 145 }
 146 #else
 147 static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CONTEXT* context)
 148 {
 149     return FALSE;
 150 }
 151 #endif
 152
 153 static unsigned arm64_map_dwarf_register(unsigned regno, BOOL eh_frame)
 154 {
 155     if (regno <= 28) return CV_ARM64_X0 + regno;
 156     if (regno == 29) return CV_ARM64_FP;
 157     if (regno == 30) return CV_ARM64_LR;
 158     if (regno == 31) return CV_ARM64_SP;
 159
 160     FIXME("Don't know how to map register %d\n", regno);
 161     return CV_ARM64_NOREG;
 162 }
 163
 164 static void* arm64_fetch_context_reg(CONTEXT* ctx, unsigned regno, unsigned* size)
 165 {
 166 #ifdef __aarch64__
 167     switch (regno)
 168     {
 169     case CV_ARM64_PSTATE: *size = sizeof(ctx->Cpsr); return &ctx->Cpsr;
 170     case CV_ARM64_X0 +  0: *size = sizeof(ctx->X0);  return &ctx->X0;
 171     case CV_ARM64_X0 +  1: *size = sizeof(ctx->X1);  return &ctx->X1;
 172     case CV_ARM64_X0 +  2: *size = sizeof(ctx->X2);  return &ctx->X2;
 173     case CV_ARM64_X0 +  3: *size = sizeof(ctx->X3);  return &ctx->X3;
 174     case CV_ARM64_X0 +  4: *size = sizeof(ctx->X4);  return &ctx->X4;
 175     case CV_ARM64_X0 +  5: *size = sizeof(ctx->X5);  return &ctx->X5;
 176     case CV_ARM64_X0 +  6: *size = sizeof(ctx->X6);  return &ctx->X6;
 177     case CV_ARM64_X0 +  7: *size = sizeof(ctx->X7);  return &ctx->X7;
 178     case CV_ARM64_X0 +  8: *size = sizeof(ctx->X8);  return &ctx->X8;
 179     case CV_ARM64_X0 +  9: *size = sizeof(ctx->X9);  return &ctx->X9;
 180     case CV_ARM64_X0 + 10: *size = sizeof(ctx->X10); return &ctx->X10;
 181     case CV_ARM64_X0 + 11: *size = sizeof(ctx->X11); return &ctx->X11;
 182     case CV_ARM64_X0 + 12: *size = sizeof(ctx->X12); return &ctx->X12;
 183     case CV_ARM64_X0 + 13: *size = sizeof(ctx->X13); return &ctx->X13;
 184     case CV_ARM64_X0 + 14: *size = sizeof(ctx->X14); return &ctx->X14;
 185     case CV_ARM64_X0 + 15: *size = sizeof(ctx->X15); return &ctx->X15;
 186     case CV_ARM64_X0 + 16: *size = sizeof(ctx->X16); return &ctx->X16;
 187     case CV_ARM64_X0 + 17: *size = sizeof(ctx->X17); return &ctx->X17;
 188     case CV_ARM64_X0 + 18: *size = sizeof(ctx->X18); return &ctx->X18;
 189     case CV_ARM64_X0 + 19: *size = sizeof(ctx->X19); return &ctx->X19;
 190     case CV_ARM64_X0 + 20: *size = sizeof(ctx->X20); return &ctx->X20;
 191     case CV_ARM64_X0 + 21: *size = sizeof(ctx->X21); return &ctx->X21;
 192     case CV_ARM64_X0 + 22: *size = sizeof(ctx->X22); return &ctx->X22;
 193     case CV_ARM64_X0 + 23: *size = sizeof(ctx->X23); return &ctx->X23;
 194     case CV_ARM64_X0 + 24: *size = sizeof(ctx->X24); return &ctx->X24;
 195     case CV_ARM64_X0 + 25: *size = sizeof(ctx->X25); return &ctx->X25;
 196     case CV_ARM64_X0 + 26: *size = sizeof(ctx->X26); return &ctx->X26;
 197     case CV_ARM64_X0 + 27: *size = sizeof(ctx->X27); return &ctx->X27;
 198     case CV_ARM64_X0 + 28: *size = sizeof(ctx->X28); return &ctx->X28;
 199
 200     case CV_ARM64_FP:     *size = sizeof(ctx->Fp);     return &ctx->Fp;
 201     case CV_ARM64_LR:     *size = sizeof(ctx->Lr);     return &ctx->Lr;
 202     case CV_ARM64_SP:     *size = sizeof(ctx->Sp);     return &ctx->Sp;
 203     case CV_ARM64_PC:     *size = sizeof(ctx->Pc);     return &ctx->Pc;
 204     }
 205 #endif
 206     FIXME("Unknown register %x\n", regno);
 207     return NULL;
 208 }
 209
 210 static const char* arm64_fetch_regname(unsigned regno)
 211 {
 212     switch (regno)
 213     {
 214     case CV_ARM64_PSTATE:  return "cpsr";
 215     case CV_ARM64_X0 +  0: return "x0";
 216     case CV_ARM64_X0 +  1: return "x1";
 217     case CV_ARM64_X0 +  2: return "x2";
 218     case CV_ARM64_X0 +  3: return "x3";
 219     case CV_ARM64_X0 +  4: return "x4";
 220     case CV_ARM64_X0 +  5: return "x5";
 221     case CV_ARM64_X0 +  6: return "x6";
 222     case CV_ARM64_X0 +  7: return "x7";
 223     case CV_ARM64_X0 +  8: return "x8";
 224     case CV_ARM64_X0 +  9: return "x9";
 225     case CV_ARM64_X0 + 10: return "x10";
 226     case CV_ARM64_X0 + 11: return "x11";
 227     case CV_ARM64_X0 + 12: return "x12";
 228     case CV_ARM64_X0 + 13: return "x13";
 229     case CV_ARM64_X0 + 14: return "x14";
 230     case CV_ARM64_X0 + 15: return "x15";
 231     case CV_ARM64_X0 + 16: return "x16";
 232     case CV_ARM64_X0 + 17: return "x17";
 233     case CV_ARM64_X0 + 18: return "x18";
 234     case CV_ARM64_X0 + 19: return "x19";
 235     case CV_ARM64_X0 + 20: return "x20";
 236     case CV_ARM64_X0 + 21: return "x21";
 237     case CV_ARM64_X0 + 22: return "x22";
 238     case CV_ARM64_X0 + 23: return "x23";
 239     case CV_ARM64_X0 + 24: return "x24";
 240     case CV_ARM64_X0 + 25: return "x25";
 241     case CV_ARM64_X0 + 26: return "x26";
 242     case CV_ARM64_X0 + 27: return "x27";
 243     case CV_ARM64_X0 + 28: return "x28";
 244
 245     case CV_ARM64_FP:     return "fp";
 246     case CV_ARM64_LR:     return "lr";
 247     case CV_ARM64_SP:     return "sp";
 248     case CV_ARM64_PC:     return "pc";
 249     }
 250     FIXME("Unknown register %x\n", regno);
 251     return NULL;
 252 }
 253
 254 static BOOL arm64_fetch_minidump_thread(struct dump_context* dc, unsigned index, unsigned flags, const CONTEXT* ctx)
 255 {
 256     if (ctx->ContextFlags && (flags & ThreadWriteInstructionWindow))
 257     {
 258         /* FIXME: crop values across module boundaries, */
 259 #ifdef __aarch64__
 260         ULONG base = ctx->Pc <= 0x80 ? 0 : ctx->Pc - 0x80;
 261         minidump_add_memory_block(dc, base, ctx->Pc + 0x80 - base, 0);
 262 #endif
 263     }
 264
 265     return TRUE;
 266 }
 267
 268 static BOOL arm64_fetch_minidump_module(struct dump_context* dc, unsigned index, unsigned flags)
 269 {
 270     /* FIXME: actually, we should probably take care of FPO data, unless it's stored in
 271      * function table minidump stream
 272      */
 273     return FALSE;
 274 }
 275
 276 DECLSPEC_HIDDEN struct cpu cpu_arm64 = {
 277     IMAGE_FILE_MACHINE_ARM64,
 278     8,
 279     CV_ARM64_FP,
 280     arm64_get_addr,
 281     arm64_stack_walk,
 282     NULL,
 283     arm64_map_dwarf_register,
 284     arm64_fetch_context_reg,
 285     arm64_fetch_regname,
 286     arm64_fetch_minidump_thread,
 287     arm64_fetch_minidump_module,
 288 };