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, union ctx *pcontext,
  67     DWORD_PTR curr_pc)
  68 {
  69     DWORD64 xframe;
  70     CONTEXT *context = &pcontext->ctx;
  71     DWORD_PTR               oldReturn = context->Lr;
  72
  73     if (dwarf2_virtual_unwind(csw, curr_pc, pcontext, &xframe))
  74     {
  75         context->Sp = xframe;
  76         context->Pc = oldReturn;
  77         return TRUE;
  78     }
  79
  80     if (context->Pc == context->Lr) return FALSE;
  81     context->Pc = oldReturn;
  82
  83     return TRUE;
  84 }
  85
  86 static BOOL arm64_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
  87     union ctx *context)
  88 {
  89     unsigned deltapc = curr_count <= 1 ? 0 : 4;
  90
  91     /* sanity check */
  92     if (curr_mode >= stm_done) return FALSE;
  93
  94     TRACE("Enter: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%I64u\n",
  95           wine_dbgstr_addr(&frame->AddrPC),
  96           wine_dbgstr_addr(&frame->AddrFrame),
  97           wine_dbgstr_addr(&frame->AddrReturn),
  98           wine_dbgstr_addr(&frame->AddrStack),
  99           curr_mode == stm_start ? "start" : "ARM64",
 100           curr_count);
 101
 102     if (curr_mode == stm_start)
 103     {
 104         /* Init done */
 105         set_curr_mode(stm_arm64);
 106         frame->AddrReturn.Mode = frame->AddrStack.Mode = AddrModeFlat;
 107         /* don't set up AddrStack on first call. Either the caller has set it up, or
 108          * we will get it in the next frame
 109          */
 110         memset(&frame->AddrBStore, 0, sizeof(frame->AddrBStore));
 111     }
 112     else
 113     {
 114         if (context->ctx.Sp != frame->AddrStack.Offset) FIXME("inconsistent Stack Pointer\n");
 115         if (context->ctx.Pc != frame->AddrPC.Offset) FIXME("inconsistent Program Counter\n");
 116
 117         if (frame->AddrReturn.Offset == 0) goto done_err;
 118         if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc))
 119             goto done_err;
 120     }
 121
 122     memset(&frame->Params, 0, sizeof(frame->Params));
 123
 124     /* set frame information */
 125     frame->AddrStack.Offset = context->ctx.Sp;
 126     frame->AddrReturn.Offset = context->ctx.Lr;
 127     frame->AddrFrame.Offset = context->ctx.Fp;
 128     frame->AddrPC.Offset = context->ctx.Pc;
 129
 130     frame->Far = TRUE;
 131     frame->Virtual = TRUE;
 132     inc_curr_count();
 133
 134     TRACE("Leave: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%I64u FuncTable=%p\n",
 135           wine_dbgstr_addr(&frame->AddrPC),
 136           wine_dbgstr_addr(&frame->AddrFrame),
 137           wine_dbgstr_addr(&frame->AddrReturn),
 138           wine_dbgstr_addr(&frame->AddrStack),
 139           curr_mode == stm_start ? "start" : "ARM64",
 140           curr_count,
 141           frame->FuncTableEntry);
 142
 143     return TRUE;
 144 done_err:
 145     set_curr_mode(stm_done);
 146     return FALSE;
 147 }
 148 #else
 149 static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, STACKFRAME64 *frame,
 150     union ctx *ctx)
 151 {
 152     return FALSE;
 153 }
 154 #endif
 155
 156 static unsigned arm64_map_dwarf_register(unsigned regno, const struct module* module, BOOL eh_frame)
 157 {
 158     if (regno <= 28) return CV_ARM64_X0 + regno;
 159     if (regno == 29) return CV_ARM64_FP;
 160     if (regno == 30) return CV_ARM64_LR;
 161     if (regno == 31) return CV_ARM64_SP;
 162     if (regno >= 64 && regno <= 95) return CV_ARM64_Q0 + regno - 64;
 163
 164     FIXME("Don't know how to map register %d\n", regno);
 165     return CV_ARM64_NOREG;
 166 }
 167
 168 static void *arm64_fetch_context_reg(union ctx *pctx, unsigned regno, unsigned *size)
 169 {
 170 #ifdef __aarch64__
 171     CONTEXT *ctx = pctx;
 172
 173     switch (regno)
 174     {
 175     case CV_ARM64_X0 +  0:
 176     case CV_ARM64_X0 +  1:
 177     case CV_ARM64_X0 +  2:
 178     case CV_ARM64_X0 +  3:
 179     case CV_ARM64_X0 +  4:
 180     case CV_ARM64_X0 +  5:
 181     case CV_ARM64_X0 +  6:
 182     case CV_ARM64_X0 +  7:
 183     case CV_ARM64_X0 +  8:
 184     case CV_ARM64_X0 +  9:
 185     case CV_ARM64_X0 + 10:
 186     case CV_ARM64_X0 + 11:
 187     case CV_ARM64_X0 + 12:
 188     case CV_ARM64_X0 + 13:
 189     case CV_ARM64_X0 + 14:
 190     case CV_ARM64_X0 + 15:
 191     case CV_ARM64_X0 + 16:
 192     case CV_ARM64_X0 + 17:
 193     case CV_ARM64_X0 + 18:
 194     case CV_ARM64_X0 + 19:
 195     case CV_ARM64_X0 + 20:
 196     case CV_ARM64_X0 + 21:
 197     case CV_ARM64_X0 + 22:
 198     case CV_ARM64_X0 + 23:
 199     case CV_ARM64_X0 + 24:
 200     case CV_ARM64_X0 + 25:
 201     case CV_ARM64_X0 + 26:
 202     case CV_ARM64_X0 + 27:
 203     case CV_ARM64_X0 + 28: *size = sizeof(ctx->X[0]); return &ctx->X[regno - CV_ARM64_X0];
 204     case CV_ARM64_PSTATE:  *size = sizeof(ctx->Cpsr); return &ctx->Cpsr;
 205     case CV_ARM64_FP:      *size = sizeof(ctx->Fp);   return &ctx->Fp;
 206     case CV_ARM64_LR:      *size = sizeof(ctx->Lr);   return &ctx->Lr;
 207     case CV_ARM64_SP:      *size = sizeof(ctx->Sp);   return &ctx->Sp;
 208     case CV_ARM64_PC:      *size = sizeof(ctx->Pc);   return &ctx->Pc;
 209     }
 210 #endif
 211     FIXME("Unknown register %x\n", regno);
 212     return NULL;
 213 }
 214
 215 static const char* arm64_fetch_regname(unsigned regno)
 216 {
 217     switch (regno)
 218     {
 219     case CV_ARM64_PSTATE:  return "cpsr";
 220     case CV_ARM64_X0 +  0: return "x0";
 221     case CV_ARM64_X0 +  1: return "x1";
 222     case CV_ARM64_X0 +  2: return "x2";
 223     case CV_ARM64_X0 +  3: return "x3";
 224     case CV_ARM64_X0 +  4: return "x4";
 225     case CV_ARM64_X0 +  5: return "x5";
 226     case CV_ARM64_X0 +  6: return "x6";
 227     case CV_ARM64_X0 +  7: return "x7";
 228     case CV_ARM64_X0 +  8: return "x8";
 229     case CV_ARM64_X0 +  9: return "x9";
 230     case CV_ARM64_X0 + 10: return "x10";
 231     case CV_ARM64_X0 + 11: return "x11";
 232     case CV_ARM64_X0 + 12: return "x12";
 233     case CV_ARM64_X0 + 13: return "x13";
 234     case CV_ARM64_X0 + 14: return "x14";
 235     case CV_ARM64_X0 + 15: return "x15";
 236     case CV_ARM64_X0 + 16: return "x16";
 237     case CV_ARM64_X0 + 17: return "x17";
 238     case CV_ARM64_X0 + 18: return "x18";
 239     case CV_ARM64_X0 + 19: return "x19";
 240     case CV_ARM64_X0 + 20: return "x20";
 241     case CV_ARM64_X0 + 21: return "x21";
 242     case CV_ARM64_X0 + 22: return "x22";
 243     case CV_ARM64_X0 + 23: return "x23";
 244     case CV_ARM64_X0 + 24: return "x24";
 245     case CV_ARM64_X0 + 25: return "x25";
 246     case CV_ARM64_X0 + 26: return "x26";
 247     case CV_ARM64_X0 + 27: return "x27";
 248     case CV_ARM64_X0 + 28: return "x28";
 249
 250     case CV_ARM64_FP:     return "fp";
 251     case CV_ARM64_LR:     return "lr";
 252     case CV_ARM64_SP:     return "sp";
 253     case CV_ARM64_PC:     return "pc";
 254     }
 255     FIXME("Unknown register %x\n", regno);
 256     return NULL;
 257 }
 258
 259 static BOOL arm64_fetch_minidump_thread(struct dump_context* dc, unsigned index, unsigned flags, const CONTEXT* ctx)
 260 {
 261     if (ctx->ContextFlags && (flags & ThreadWriteInstructionWindow))
 262     {
 263         /* FIXME: crop values across module boundaries, */
 264 #ifdef __aarch64__
 265         ULONG64 base = ctx->Pc <= 0x80 ? 0 : ctx->Pc - 0x80;
 266         minidump_add_memory_block(dc, base, ctx->Pc + 0x80 - base, 0);
 267 #endif
 268     }
 269
 270     return TRUE;
 271 }
 272
 273 static BOOL arm64_fetch_minidump_module(struct dump_context* dc, unsigned index, unsigned flags)
 274 {
 275     /* FIXME: actually, we should probably take care of FPO data, unless it's stored in
 276      * function table minidump stream
 277      */
 278     return FALSE;
 279 }
 280
 281 DECLSPEC_HIDDEN struct cpu cpu_arm64 = {
 282     IMAGE_FILE_MACHINE_ARM64,
 283     8,
 284     CV_ARM64_FP,
 285     arm64_get_addr,
 286     arm64_stack_walk,
 287     NULL,
 288     arm64_map_dwarf_register,
 289     arm64_fetch_context_reg,
 290     arm64_fetch_regname,
 291     arm64_fetch_minidump_thread,
 292     arm64_fetch_minidump_module,
 293 };