dlls/dbghelp/cpu_x86_64.c

   1 /*
   2  * File cpu_x86_64.c
   3  *
   4  * Copyright (C) 2009-2009, Eric Pouech.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <assert.h>
  22
  23 #include "ntstatus.h"
  24 #define WIN32_NO_STATUS
  25 #include "dbghelp_private.h"
  26 #include "winternl.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
  30
  31 static unsigned x86_64_get_addr(HANDLE hThread, const CONTEXT* ctx,
  32                                 enum cpu_addr ca, ADDRESS64* addr)
  33 {
  34     addr->Mode = AddrModeFlat;
  35     switch (ca)
  36     {
  37 #ifdef __x86_64__
  38     case cpu_addr_pc:    addr->Segment = ctx->SegCs; addr->Offset = ctx->Rip; return TRUE;
  39     case cpu_addr_stack: addr->Segment = ctx->SegSs; addr->Offset = ctx->Rsp; return TRUE;
  40     case cpu_addr_frame: addr->Segment = ctx->SegSs; addr->Offset = ctx->Rbp; return TRUE;
  41 #endif
  42     default: addr->Mode = -1;
  43         return FALSE;
  44     }
  45 }
  46
  47 enum st_mode {stm_start, stm_64bit, stm_done};
  48
  49 /* indexes in Reserved array */
  50 #define __CurrentMode     0
  51 #define __CurrentSwitch   1
  52 #define __NextSwitch      2
  53
  54 #define curr_mode   (frame->Reserved[__CurrentMode])
  55 #define curr_switch (frame->Reserved[__CurrentSwitch])
  56 #define next_switch (frame->Reserved[__NextSwitch])
  57
  58 static BOOL x86_64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame)
  59 {
  60     /* sanity check */
  61     if (curr_mode >= stm_done) return FALSE;
  62     assert(!csw->is32);
  63
  64     TRACE("Enter: PC=%s Frame=%s Return=%s Stack=%s Mode=%s\n",
  65           wine_dbgstr_addr(&frame->AddrPC),
  66           wine_dbgstr_addr(&frame->AddrFrame),
  67           wine_dbgstr_addr(&frame->AddrReturn),
  68           wine_dbgstr_addr(&frame->AddrStack),
  69           curr_mode == stm_start ? "start" : "64bit");
  70
  71     if (curr_mode == stm_start)
  72     {
  73         if ((frame->AddrPC.Mode == AddrModeFlat) &&
  74             (frame->AddrFrame.Mode != AddrModeFlat))
  75         {
  76             WARN("Bad AddrPC.Mode / AddrFrame.Mode combination\n");
  77             goto done_err;
  78         }
  79
  80         /* Init done */
  81         curr_mode = stm_64bit;
  82         curr_switch = 0;
  83         frame->AddrReturn.Mode = frame->AddrStack.Mode = AddrModeFlat;
  84         /* don't set up AddrStack on first call. Either the caller has set it up, or
  85          * we will get it in the next frame
  86          */
  87         memset(&frame->AddrBStore, 0, sizeof(frame->AddrBStore));
  88     }
  89     else
  90     {
  91         if (frame->AddrReturn.Offset == 0) goto done_err;
  92         frame->AddrPC = frame->AddrReturn;
  93     }
  94
  95     if (!sw_read_mem(csw, frame->AddrStack.Offset,
  96                      &frame->AddrReturn.Offset, sizeof(DWORD64)))
  97     {
  98         WARN("Cannot read new frame offset %s\n",
  99              wine_dbgstr_longlong(frame->AddrFrame.Offset + sizeof(DWORD64)));
 100         goto done_err;
 101     }
 102     /* FIXME: simplistic stuff... need to handle both dwarf & PE stack information */
 103     frame->AddrStack.Offset += sizeof(DWORD64);
 104     memset(&frame->Params, 0, sizeof(frame->Params));
 105
 106     frame->Far = TRUE;
 107     frame->Virtual = TRUE;
 108     if (frame->AddrPC.Offset && sw_module_base(csw, frame->AddrPC.Offset))
 109         frame->FuncTableEntry = sw_table_access(csw, frame->AddrPC.Offset);
 110     else
 111         frame->FuncTableEntry = NULL;
 112
 113     TRACE("Leave: PC=%s Frame=%s Return=%s Stack=%s Mode=%s FuncTable=%p\n",
 114           wine_dbgstr_addr(&frame->AddrPC),
 115           wine_dbgstr_addr(&frame->AddrFrame),
 116           wine_dbgstr_addr(&frame->AddrReturn),
 117           wine_dbgstr_addr(&frame->AddrStack),
 118           curr_mode == stm_start ? "start" : "64bit",
 119           frame->FuncTableEntry);
 120
 121     return TRUE;
 122 done_err:
 123     curr_mode = stm_done;
 124     return FALSE;
 125 }
 126
 127 struct cpu cpu_x86_64 = {
 128     IMAGE_FILE_MACHINE_AMD64,
 129     8,
 130     x86_64_get_addr,
 131     x86_64_stack_walk,
 132 };