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 #define NONAMELESSUNION
  25 #define NONAMELESSSTRUCT
  26 #include "ntstatus.h"
  27 #define WIN32_NO_STATUS
  28 #include "dbghelp_private.h"
  29 #include "winternl.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
  33
  34 static BOOL arm64_get_addr(HANDLE hThread, const CONTEXT* ctx,
  35                            enum cpu_addr ca, ADDRESS64* addr)
  36 {
  37     addr->Mode    = AddrModeFlat;
  38     addr->Segment = 0; /* don't need segment */
  39     switch (ca)
  40     {
  41 #ifdef __aarch64__
  42     case cpu_addr_pc:    addr->Offset = ctx->Pc;  return TRUE;
  43     case cpu_addr_stack: addr->Offset = ctx->Sp;  return TRUE;
  44     case cpu_addr_frame: addr->Offset = ctx->u.s.Fp; return TRUE;
  45 #endif
  46     default: addr->Mode = -1;
  47         return FALSE;
  48     }
  49 }
  50
  51 #ifdef __aarch64__
  52 enum st_mode {stm_start, stm_arm64, stm_done};
  53
  54 /* indexes in Reserved array */
  55 #define __CurrentModeCount      0
  56
  57 #define curr_mode   (frame->Reserved[__CurrentModeCount] & 0x0F)
  58 #define curr_count  (frame->Reserved[__CurrentModeCount] >> 4)
  59
  60 #define set_curr_mode(m) {frame->Reserved[__CurrentModeCount] &= ~0x0F; frame->Reserved[__CurrentModeCount] |= (m & 0x0F);}
  61 #define inc_curr_count() (frame->Reserved[__CurrentModeCount] += 0x10)
  62
  63 /* fetch_next_frame()
  64  *
  65  * modify (at least) context.Pc using unwind information
  66  * either out of debug info (dwarf), or simple Lr trace
  67  */
  68 static BOOL fetch_next_frame(struct cpu_stack_walk* csw, union ctx *pcontext,
  69     DWORD_PTR curr_pc)
  70 {
  71     DWORD64 xframe;
  72     CONTEXT *context = &pcontext->ctx;
  73     DWORD_PTR               oldReturn = context->u.s.Lr;
  74
  75     if (dwarf2_virtual_unwind(csw, curr_pc, pcontext, &xframe))
  76     {
  77         context->Sp = xframe;
  78         context->Pc = oldReturn;
  79         return TRUE;
  80     }
  81
  82     if (context->Pc == context->u.s.Lr) return FALSE;
  83     context->Pc = oldReturn;
  84
  85     return TRUE;
  86 }
  87
  88 static BOOL arm64_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
  89     union ctx *context)
  90 {
  91     unsigned deltapc = curr_count <= 1 ? 0 : 4;
  92
  93     /* sanity check */
  94     if (curr_mode >= stm_done) return FALSE;
  95
  96     TRACE("Enter: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s\n",
  97           wine_dbgstr_addr(&frame->AddrPC),
  98           wine_dbgstr_addr(&frame->AddrFrame),
  99           wine_dbgstr_addr(&frame->AddrReturn),
 100           wine_dbgstr_addr(&frame->AddrStack),
 101           curr_mode == stm_start ? "start" : "ARM64",
 102           wine_dbgstr_longlong(curr_count));
 103
 104     if (curr_mode == stm_start)
 105     {
 106         /* Init done */
 107         set_curr_mode(stm_arm64);
 108         frame->AddrReturn.Mode = frame->AddrStack.Mode = AddrModeFlat;
 109         /* don't set up AddrStack on first call. Either the caller has set it up, or
 110          * we will get it in the next frame
 111          */
 112         memset(&frame->AddrBStore, 0, sizeof(frame->AddrBStore));
 113     }
 114     else
 115     {
 116         if (context->ctx.Sp != frame->AddrStack.Offset) FIXME("inconsistent Stack Pointer\n");
 117         if (context->ctx.Pc != frame->AddrPC.Offset) FIXME("inconsistent Program Counter\n");
 118
 119         if (frame->AddrReturn.Offset == 0) goto done_err;
 120         if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc))
 121             goto done_err;
 122     }
 123
 124     memset(&frame->Params, 0, sizeof(frame->Params));
 125
 126     /* set frame information */
 127     frame->AddrStack.Offset = context->ctx.Sp;
 128     frame->AddrReturn.Offset = context->ctx.u.s.Lr;
 129     frame->AddrFrame.Offset = context->ctx.u.s.Fp;
 130     frame->AddrPC.Offset = context->ctx.Pc;
 131
 132     frame->Far = TRUE;
 133     frame->Virtual = TRUE;
 134     inc_curr_count();
 135
 136     TRACE("Leave: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s FuncTable=%p\n",
 137           wine_dbgstr_addr(&frame->AddrPC),
 138           wine_dbgstr_addr(&frame->AddrFrame),
 139           wine_dbgstr_addr(&frame->AddrReturn),
 140           wine_dbgstr_addr(&frame->AddrStack),
 141           curr_mode == stm_start ? "start" : "ARM64",
 142           wine_dbgstr_longlong(curr_count),
 143           frame->FuncTableEntry);
 144
 145     return TRUE;
 146 done_err:
 147     set_curr_mode(stm_done);
 148     return FALSE;
 149 }
 150 #else
 151 static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, STACKFRAME64 *frame,
 152     union ctx *ctx)
 153 {
 154     return FALSE;
 155 }
 156 #endif
 157
 158 static unsigned arm64_map_dwarf_register(unsigned regno, BOOL eh_frame)
 159 {
 160     if (regno <= 28) return CV_ARM64_X0 + regno;
 161     if (regno == 29) return CV_ARM64_FP;
 162     if (regno == 30) return CV_ARM64_LR;
 163     if (regno == 31) return CV_ARM64_SP;
 164     if (regno >= 64 && regno <= 95) return CV_ARM64_Q0 + regno - 64;
 165
 166     FIXME("Don't know how to map register %d\n", regno);
 167     return CV_ARM64_NOREG;
 168 }
 169
 170 static void *arm64_fetch_context_reg(union ctx *pctx, unsigned regno, unsigned *size)
 171 {
 172 #ifdef __aarch64__
 173     CONTEXT *ctx = pctx;
 174
 175     switch (regno)
 176     {
 177     case CV_ARM64_X0 +  0:
 178     case CV_ARM64_X0 +  1:
 179     case CV_ARM64_X0 +  2:
 180     case CV_ARM64_X0 +  3:
 181     case CV_ARM64_X0 +  4:
 182     case CV_ARM64_X0 +  5:
 183     case CV_ARM64_X0 +  6:
 184     case CV_ARM64_X0 +  7:
 185     case CV_ARM64_X0 +  8:
 186     case CV_ARM64_X0 +  9:
 187     case CV_ARM64_X0 + 10:
 188     case CV_ARM64_X0 + 11:
 189     case CV_ARM64_X0 + 12:
 190     case CV_ARM64_X0 + 13:
 191     case CV_ARM64_X0 + 14:
 192     case CV_ARM64_X0 + 15:
 193     case CV_ARM64_X0 + 16:
 194     case CV_ARM64_X0 + 17:
 195     case CV_ARM64_X0 + 18:
 196     case CV_ARM64_X0 + 19:
 197     case CV_ARM64_X0 + 20:
 198     case CV_ARM64_X0 + 21:
 199     case CV_ARM64_X0 + 22:
 200     case CV_ARM64_X0 + 23:
 201     case CV_ARM64_X0 + 24:
 202     case CV_ARM64_X0 + 25:
 203     case CV_ARM64_X0 + 26:
 204     case CV_ARM64_X0 + 27:
 205     case CV_ARM64_X0 + 28: *size = sizeof(ctx->u.X[0]); return &ctx->u.X[regno - CV_ARM64_X0];
 206     case CV_ARM64_PSTATE:  *size = sizeof(ctx->Cpsr);   return &ctx->Cpsr;
 207     case CV_ARM64_FP:      *size = sizeof(ctx->u.s.Fp); return &ctx->u.s.Fp;
 208     case CV_ARM64_LR:      *size = sizeof(ctx->u.s.Lr); return &ctx->u.s.Lr;
 209     case CV_ARM64_SP:      *size = sizeof(ctx->Sp);     return &ctx->Sp;
 210     case CV_ARM64_PC:      *size = sizeof(ctx->Pc);     return &ctx->Pc;
 211     }
 212 #endif
 213     FIXME("Unknown register %x\n", regno);
 214     return NULL;
 215 }
 216
 217 static const char* arm64_fetch_regname(unsigned regno)
 218 {
 219     switch (regno)
 220     {
 221     case CV_ARM64_PSTATE:  return "cpsr";
 222     case CV_ARM64_X0 +  0: return "x0";
 223     case CV_ARM64_X0 +  1: return "x1";
 224     case CV_ARM64_X0 +  2: return "x2";
 225     case CV_ARM64_X0 +  3: return "x3";
 226     case CV_ARM64_X0 +  4: return "x4";
 227     case CV_ARM64_X0 +  5: return "x5";
 228     case CV_ARM64_X0 +  6: return "x6";
 229     case CV_ARM64_X0 +  7: return "x7";
 230     case CV_ARM64_X0 +  8: return "x8";
 231     case CV_ARM64_X0 +  9: return "x9";
 232     case CV_ARM64_X0 + 10: return "x10";
 233     case CV_ARM64_X0 + 11: return "x11";
 234     case CV_ARM64_X0 + 12: return "x12";
 235     case CV_ARM64_X0 + 13: return "x13";
 236     case CV_ARM64_X0 + 14: return "x14";
 237     case CV_ARM64_X0 + 15: return "x15";
 238     case CV_ARM64_X0 + 16: return "x16";
 239     case CV_ARM64_X0 + 17: return "x17";
 240     case CV_ARM64_X0 + 18: return "x18";
 241     case CV_ARM64_X0 + 19: return "x19";
 242     case CV_ARM64_X0 + 20: return "x20";
 243     case CV_ARM64_X0 + 21: return "x21";
 244     case CV_ARM64_X0 + 22: return "x22";
 245     case CV_ARM64_X0 + 23: return "x23";
 246     case CV_ARM64_X0 + 24: return "x24";
 247     case CV_ARM64_X0 + 25: return "x25";
 248     case CV_ARM64_X0 + 26: return "x26";
 249     case CV_ARM64_X0 + 27: return "x27";
 250     case CV_ARM64_X0 + 28: return "x28";
 251
 252     case CV_ARM64_FP:     return "fp";
 253     case CV_ARM64_LR:     return "lr";
 254     case CV_ARM64_SP:     return "sp";
 255     case CV_ARM64_PC:     return "pc";
 256     }
 257     FIXME("Unknown register %x\n", regno);
 258     return NULL;
 259 }
 260
 261 static BOOL arm64_fetch_minidump_thread(struct dump_context* dc, unsigned index, unsigned flags, const CONTEXT* ctx)
 262 {
 263     if (ctx->ContextFlags && (flags & ThreadWriteInstructionWindow))
 264     {
 265         /* FIXME: crop values across module boundaries, */
 266 #ifdef __aarch64__
 267         ULONG base = ctx->Pc <= 0x80 ? 0 : ctx->Pc - 0x80;
 268         minidump_add_memory_block(dc, base, ctx->Pc + 0x80 - base, 0);
 269 #endif
 270     }
 271
 272     return TRUE;
 273 }
 274
 275 static BOOL arm64_fetch_minidump_module(struct dump_context* dc, unsigned index, unsigned flags)
 276 {
 277     /* FIXME: actually, we should probably take care of FPO data, unless it's stored in
 278      * function table minidump stream
 279      */
 280     return FALSE;
 281 }
 282
 283 DECLSPEC_HIDDEN struct cpu cpu_arm64 = {
 284     IMAGE_FILE_MACHINE_ARM64,
 285     8,
 286     CV_ARM64_FP,
 287     arm64_get_addr,
 288     arm64_stack_walk,
 289     NULL,
 290     arm64_map_dwarf_register,
 291     arm64_fetch_context_reg,
 292     arm64_fetch_regname,
 293     arm64_fetch_minidump_thread,
 294     arm64_fetch_minidump_module,
 295 };