https://git.reactos.org/?p=reactos.git;a=commitdiff;h=7470eb9ced8b0f1f1180fa4a6d305645cbd4704a

commit 7470eb9ced8b0f1f1180fa4a6d305645cbd4704a
Author:     winesync <[email protected]>
AuthorDate: Fri Sep 11 13:20:36 2020 +0200
Commit:     Jérôme Gardou <[email protected]>
CommitDate: Wed Sep 16 10:35:34 2020 +0200

    [WINESYNC] dbghelp: Use WOW64_CONTEXT instead of CONTEXT for i386 backend.
    
    Signed-off-by: Zebediah Figura <[email protected]>
    Signed-off-by: Alexandre Julliard <[email protected]>
    
    wine commit id 3ce304e60100962503bcded0adb69659f849d1b4 by Zebediah Figura 
<[email protected]>
---
 dll/win32/dbghelp/compat.h          | 68 +++++++++++++++++++++++++++++++++++
 dll/win32/dbghelp/cpu_arm.c         | 31 +++++++++-------
 dll/win32/dbghelp/cpu_arm64.c       | 29 ++++++++-------
 dll/win32/dbghelp/cpu_i386.c        | 71 ++++++++++++++++---------------------
 dll/win32/dbghelp/cpu_ppc.c         |  5 +--
 dll/win32/dbghelp/cpu_x86_64.c      | 29 ++++++++-------
 dll/win32/dbghelp/dbghelp_private.h | 19 ++++++----
 dll/win32/dbghelp/dwarf.c           | 18 +++++-----
 dll/win32/dbghelp/msc.c             |  4 +--
 sdk/tools/winesync/dbghelp.cfg      |  2 +-
 10 files changed, 180 insertions(+), 96 deletions(-)

diff --git a/dll/win32/dbghelp/compat.h b/dll/win32/dbghelp/compat.h
index 8f6047ea120..4917889ca1c 100644
--- a/dll/win32/dbghelp/compat.h
+++ b/dll/win32/dbghelp/compat.h
@@ -202,6 +202,74 @@ typedef struct _EXCEPTION_RECORD {
   DWORD NumberParameters;
   ULONG_PTR ExceptionInformation[EXCEPTION_MAXIMUM_PARAMETERS];
 } EXCEPTION_RECORD, *PEXCEPTION_RECORD;
+
+#define WOW64_CONTEXT_i386 0x00010000
+#define WOW64_CONTEXT_i486 0x00010000
+#define WOW64_CONTEXT_CONTROL (WOW64_CONTEXT_i386 | __MSABI_LONG(0x00000001))
+#define WOW64_CONTEXT_INTEGER (WOW64_CONTEXT_i386 | __MSABI_LONG(0x00000002))
+#define WOW64_CONTEXT_SEGMENTS (WOW64_CONTEXT_i386 | __MSABI_LONG(0x00000004))
+#define WOW64_CONTEXT_FLOATING_POINT (WOW64_CONTEXT_i386 | 
__MSABI_LONG(0x00000008))
+#define WOW64_CONTEXT_DEBUG_REGISTERS (WOW64_CONTEXT_i386 | 
__MSABI_LONG(0x00000010))
+#define WOW64_CONTEXT_EXTENDED_REGISTERS (WOW64_CONTEXT_i386 | 
__MSABI_LONG(0x00000020))
+#define WOW64_CONTEXT_FULL (WOW64_CONTEXT_CONTROL | WOW64_CONTEXT_INTEGER | 
WOW64_CONTEXT_SEGMENTS)
+#define WOW64_CONTEXT_ALL (WOW64_CONTEXT_CONTROL | WOW64_CONTEXT_INTEGER | \
+                           WOW64_CONTEXT_SEGMENTS | 
WOW64_CONTEXT_FLOATING_POINT | \
+                           WOW64_CONTEXT_DEBUG_REGISTERS | 
WOW64_CONTEXT_EXTENDED_REGISTERS)
+
+#define WOW64_CONTEXT_XSTATE (WOW64_CONTEXT_i386 | __MSABI_LONG(0x00000040))
+
+#define WOW64_CONTEXT_EXCEPTION_ACTIVE      0x08000000
+#define WOW64_CONTEXT_SERVICE_ACTIVE        0x10000000
+#define WOW64_CONTEXT_EXCEPTION_REQUEST     0x40000000
+#define WOW64_CONTEXT_EXCEPTION_REPORTING   0x80000000
+
+#define WOW64_SIZE_OF_80387_REGISTERS 80
+#define WOW64_MAXIMUM_SUPPORTED_EXTENSION 512
+
+typedef struct _WOW64_FLOATING_SAVE_AREA
+{
+    DWORD   ControlWord;
+    DWORD   StatusWord;
+    DWORD   TagWord;
+    DWORD   ErrorOffset;
+    DWORD   ErrorSelector;
+    DWORD   DataOffset;
+    DWORD   DataSelector;
+    BYTE    RegisterArea[WOW64_SIZE_OF_80387_REGISTERS];
+    DWORD   Cr0NpxState;
+} WOW64_FLOATING_SAVE_AREA, *PWOW64_FLOATING_SAVE_AREA;
+
+#include "pshpack4.h"
+typedef struct _WOW64_CONTEXT
+{
+    DWORD ContextFlags;
+    DWORD Dr0;
+    DWORD Dr1;
+    DWORD Dr2;
+    DWORD Dr3;
+    DWORD Dr6;
+    DWORD Dr7;
+    WOW64_FLOATING_SAVE_AREA FloatSave;
+    DWORD SegGs;
+    DWORD SegFs;
+    DWORD SegEs;
+    DWORD SegDs;
+    DWORD Edi;
+    DWORD Esi;
+    DWORD Ebx;
+    DWORD Edx;
+    DWORD Ecx;
+    DWORD Eax;
+    DWORD Ebp;
+    DWORD Eip;
+    DWORD SegCs;
+    DWORD EFlags;
+    DWORD Esp;
+    DWORD SegSs;
+    BYTE ExtendedRegisters[WOW64_MAXIMUM_SUPPORTED_EXTENSION];
+} WOW64_CONTEXT, *PWOW64_CONTEXT;
+#include "poppack.h"
+
 #if defined(TARGET_i386)
 #define SIZE_OF_80387_REGISTERS        80
 #define CONTEXT_i386   0x10000
diff --git a/dll/win32/dbghelp/cpu_arm.c b/dll/win32/dbghelp/cpu_arm.c
index 52461606a8b..3395b6e50cb 100644
--- a/dll/win32/dbghelp/cpu_arm.c
+++ b/dll/win32/dbghelp/cpu_arm.c
@@ -67,13 +67,14 @@ enum st_mode {stm_start, stm_arm, stm_done};
  * modify (at least) context.Pc using unwind information
  * either out of debug info (dwarf), or simple Lr trace
  */
-static BOOL fetch_next_frame(struct cpu_stack_walk* csw,
-                               CONTEXT* context, DWORD_PTR curr_pc)
+static BOOL fetch_next_frame(struct cpu_stack_walk* csw, union ctx *pcontext,
+    DWORD_PTR curr_pc)
 {
     DWORD_PTR               xframe;
+    CONTEXT *context = &pcontext->ctx;
     DWORD                   oldReturn = context->Lr;
 
-    if (dwarf2_virtual_unwind(csw, curr_pc, context, &xframe))
+    if (dwarf2_virtual_unwind(csw, curr_pc, pcontext, &xframe))
     {
         context->Sp = xframe;
         context->Pc = oldReturn;
@@ -86,7 +87,8 @@ static BOOL fetch_next_frame(struct cpu_stack_walk* csw,
     return TRUE;
 }
 
-static BOOL arm_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, 
CONTEXT* context)
+static BOOL arm_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
+    union ctx *context)
 {
     unsigned    deltapc = curr_count <= 1 ? 0 : 4;
 
@@ -113,8 +115,8 @@ static BOOL arm_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CON
     }
     else
     {
-        if (context->Sp != frame->AddrStack.Offset) FIXME("inconsistent Stack 
Pointer\n");
-        if (context->Pc != frame->AddrPC.Offset) FIXME("inconsistent Program 
Counter\n");
+        if (context->ctx.Sp != frame->AddrStack.Offset) FIXME("inconsistent 
Stack Pointer\n");
+        if (context->ctx.Pc != frame->AddrPC.Offset) FIXME("inconsistent 
Program Counter\n");
 
         if (frame->AddrReturn.Offset == 0) goto done_err;
         if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc))
@@ -124,14 +126,14 @@ static BOOL arm_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CON
     memset(&frame->Params, 0, sizeof(frame->Params));
 
     /* set frame information */
-    frame->AddrStack.Offset = context->Sp;
-    frame->AddrReturn.Offset = context->Lr;
+    frame->AddrStack.Offset = context->ctx.Sp;
+    frame->AddrReturn.Offset = context->ctx.Lr;
 #ifdef __REACTOS__
-    frame->AddrFrame.Offset = context->R11;
+    frame->AddrFrame.Offset = context->ctx.R11;
 #else
-    frame->AddrFrame.Offset = context->Fp;
+    frame->AddrFrame.Offset = context->ctx.Fp;
 #endif
-    frame->AddrPC.Offset = context->Pc;
+    frame->AddrPC.Offset = context->ctx.Pc;
 
     frame->Far = TRUE;
     frame->Virtual = TRUE;
@@ -152,7 +154,8 @@ done_err:
     return FALSE;
 }
 #else
-static BOOL arm_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, 
CONTEXT* context)
+static BOOL arm_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
+    union ctx *context)
 {
     return FALSE;
 }
@@ -167,9 +170,11 @@ static unsigned arm_map_dwarf_register(unsigned regno, 
BOOL eh_frame)
     return CV_ARM_NOREG;
 }
 
-static void* arm_fetch_context_reg(CONTEXT* ctx, unsigned regno, unsigned* 
size)
+static void *arm_fetch_context_reg(union ctx *pctx, unsigned regno, unsigned 
*size)
 {
 #ifdef __arm__
+    CONTEXT *ctx = &pctx->ctx;
+
     switch (regno)
     {
     case CV_ARM_R0 +  0: *size = sizeof(ctx->R0); return &ctx->R0;
diff --git a/dll/win32/dbghelp/cpu_arm64.c b/dll/win32/dbghelp/cpu_arm64.c
index f50b3255bd0..7a4a94762e8 100644
--- a/dll/win32/dbghelp/cpu_arm64.c
+++ b/dll/win32/dbghelp/cpu_arm64.c
@@ -65,13 +65,14 @@ enum st_mode {stm_start, stm_arm64, stm_done};
  * modify (at least) context.Pc using unwind information
  * either out of debug info (dwarf), or simple Lr trace
  */
-static BOOL fetch_next_frame(struct cpu_stack_walk* csw,
-                               CONTEXT* context, DWORD_PTR curr_pc)
+static BOOL fetch_next_frame(struct cpu_stack_walk* csw, union ctx *pcontext,
+    DWORD_PTR curr_pc)
 {
     DWORD_PTR               xframe;
+    CONTEXT *context = &pcontext->ctx;
     DWORD_PTR               oldReturn = context->u.s.Lr;
 
-    if (dwarf2_virtual_unwind(csw, curr_pc, context, &xframe))
+    if (dwarf2_virtual_unwind(csw, curr_pc, pcontext, &xframe))
     {
         context->Sp = xframe;
         context->Pc = oldReturn;
@@ -84,7 +85,8 @@ static BOOL fetch_next_frame(struct cpu_stack_walk* csw,
     return TRUE;
 }
 
-static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, 
CONTEXT* context)
+static BOOL arm64_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
+    union ctx *context)
 {
     unsigned deltapc = curr_count <= 1 ? 0 : 4;
 
@@ -111,8 +113,8 @@ static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, C
     }
     else
     {
-        if (context->Sp != frame->AddrStack.Offset) FIXME("inconsistent Stack 
Pointer\n");
-        if (context->Pc != frame->AddrPC.Offset) FIXME("inconsistent Program 
Counter\n");
+        if (context->ctx.Sp != frame->AddrStack.Offset) FIXME("inconsistent 
Stack Pointer\n");
+        if (context->ctx.Pc != frame->AddrPC.Offset) FIXME("inconsistent 
Program Counter\n");
 
         if (frame->AddrReturn.Offset == 0) goto done_err;
         if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc))
@@ -122,10 +124,10 @@ static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, C
     memset(&frame->Params, 0, sizeof(frame->Params));
 
     /* set frame information */
-    frame->AddrStack.Offset = context->Sp;
-    frame->AddrReturn.Offset = context->u.s.Lr;
-    frame->AddrFrame.Offset = context->u.s.Fp;
-    frame->AddrPC.Offset = context->Pc;
+    frame->AddrStack.Offset = context->ctx.Sp;
+    frame->AddrReturn.Offset = context->ctx.u.s.Lr;
+    frame->AddrFrame.Offset = context->ctx.u.s.Fp;
+    frame->AddrPC.Offset = context->ctx.Pc;
 
     frame->Far = TRUE;
     frame->Virtual = TRUE;
@@ -146,7 +148,8 @@ done_err:
     return FALSE;
 }
 #else
-static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, 
CONTEXT* context)
+static BOOL arm64_stack_walk(struct cpu_stack_walk* csw, STACKFRAME64 *frame,
+    union ctx *ctx)
 {
     return FALSE;
 }
@@ -164,9 +167,11 @@ static unsigned arm64_map_dwarf_register(unsigned regno, 
BOOL eh_frame)
     return CV_ARM64_NOREG;
 }
 
-static void* arm64_fetch_context_reg(CONTEXT* ctx, unsigned regno, unsigned* 
size)
+static void *arm64_fetch_context_reg(union ctx *pctx, unsigned regno, unsigned 
*size)
 {
 #ifdef __aarch64__
+    CONTEXT *ctx = pctx;
+
     switch (regno)
     {
     case CV_ARM64_X0 +  0:
diff --git a/dll/win32/dbghelp/cpu_i386.c b/dll/win32/dbghelp/cpu_i386.c
index e8056a78a3c..6ed98341343 100644
--- a/dll/win32/dbghelp/cpu_i386.c
+++ b/dll/win32/dbghelp/cpu_i386.c
@@ -90,22 +90,21 @@ static BOOL i386_get_addr(HANDLE hThread, const CONTEXT* 
ctx,
 #endif
     return FALSE;
 }
-#endif /* DBGHELP_STATIC_LIB */
 
-#if defined(__i386__) && !defined(DBGHELP_STATIC_LIB)
 /* fetch_next_frame32()
  *
  * modify (at least) context.{eip, esp, ebp} using unwind information
  * either out of debug info (dwarf, pdb), or simple stack unwind
  */
 static BOOL fetch_next_frame32(struct cpu_stack_walk* csw,
-                               CONTEXT* context, DWORD_PTR curr_pc)
+                               union ctx *pcontext, DWORD_PTR curr_pc)
 {
     DWORD_PTR               xframe;
     struct pdb_cmd_pair     cpair[4];
     DWORD                   val32;
+    WOW64_CONTEXT *context = &pcontext->x86;
 
-    if (dwarf2_virtual_unwind(csw, curr_pc, context, &xframe))
+    if (dwarf2_virtual_unwind(csw, curr_pc, pcontext, &xframe))
     {
         context->Esp = xframe;
         return TRUE;
@@ -115,9 +114,7 @@ static BOOL fetch_next_frame32(struct cpu_stack_walk* csw,
     cpair[2].name = "$eip";      cpair[2].pvalue = &context->Eip;
     cpair[3].name = NULL;        cpair[3].pvalue = NULL;
 
-#ifndef DBGHELP_STATIC_LIB
-    if (!pdb_virtual_unwind(csw, curr_pc, context, cpair))
-#endif
+    if (!pdb_virtual_unwind(csw, curr_pc, pcontext, cpair))
     {
         /* do a simple unwind using ebp
          * we assume a "regular" prologue in the function has been used
@@ -138,7 +135,6 @@ static BOOL fetch_next_frame32(struct cpu_stack_walk* csw,
     }
     return TRUE;
 }
-#endif
 
 enum st_mode {stm_start, stm_32bit, stm_16bit, stm_done};
 
@@ -155,8 +151,8 @@ enum st_mode {stm_start, stm_32bit, stm_16bit, stm_done};
 #define set_curr_mode(m) {frame->Reserved[__CurrentModeCount] &= ~0x0F; 
frame->Reserved[__CurrentModeCount] |= (m & 0x0F);}
 #define inc_curr_count() (frame->Reserved[__CurrentModeCount] += 0x10)
 
-#ifndef DBGHELP_STATIC_LIB
-static BOOL i386_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, 
CONTEXT* context)
+static BOOL i386_stack_walk(struct cpu_stack_walk* csw, STACKFRAME64 *frame,
+    union ctx *context)
 {
     STACK32FRAME        frame32;
     STACK16FRAME        frame16;
@@ -166,10 +162,8 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CO
     WORD                val16;
     DWORD               val32;
     BOOL                do_switch;
-#ifdef __i386__
     unsigned            deltapc;
-    CONTEXT             _context;
-#endif
+    union ctx _context;
 
     /* sanity check */
     if (curr_mode >= stm_done) return FALSE;
@@ -183,7 +177,6 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CO
           wine_dbgstr_longlong(curr_count),
           (void*)(DWORD_PTR)curr_switch, (void*)(DWORD_PTR)next_switch);
 
-#ifdef __i386__
     /* if we're at first call (which doesn't actually unwind, it just computes 
ReturnPC,
      * or if we're doing the first real unwind (count == 1), then we can 
directly use
      * eip. otherwise, eip is *after* the insn that actually made the call to
@@ -199,15 +192,18 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CO
         /* setup a pseudo context for the rest of the code (esp. unwinding) */
         context = &_context;
         memset(context, 0, sizeof(*context));
-        context->ContextFlags = CONTEXT_CONTROL | CONTEXT_SEGMENTS;
-        if (frame->AddrPC.Mode != AddrModeFlat)    context->SegCs = 
frame->AddrPC.Segment;
-        context->Eip = frame->AddrPC.Offset;
-        if (frame->AddrFrame.Mode != AddrModeFlat) context->SegSs = 
frame->AddrFrame.Segment;
-        context->Ebp = frame->AddrFrame.Offset;
-        if (frame->AddrStack.Mode != AddrModeFlat) context->SegSs = 
frame->AddrStack.Segment;
-        context->Esp = frame->AddrStack.Offset;
+        context->x86.ContextFlags = WOW64_CONTEXT_CONTROL | 
WOW64_CONTEXT_SEGMENTS;
+        if (frame->AddrPC.Mode != AddrModeFlat)
+            context->x86.SegCs = frame->AddrPC.Segment;
+        context->x86.Eip = frame->AddrPC.Offset;
+        if (frame->AddrFrame.Mode != AddrModeFlat)
+            context->x86.SegSs = frame->AddrFrame.Segment;
+        context->x86.Ebp = frame->AddrFrame.Offset;
+        if (frame->AddrStack.Mode != AddrModeFlat)
+            context->x86.SegSs = frame->AddrStack.Segment;
+        context->x86.Esp = frame->AddrStack.Offset;
     }
-#endif
+
     if (curr_mode == stm_start)
     {
         THREAD_BASIC_INFORMATION info;
@@ -405,18 +401,16 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CO
             }
             else
             {
-#ifdef __i386__
                 if (!fetch_next_frame32(csw, context, sw_xlat_addr(csw, 
&frame->AddrPC) - deltapc))
                     goto done_err;
 
                 frame->AddrStack.Mode = frame->AddrFrame.Mode = 
frame->AddrPC.Mode = AddrModeFlat;
-                frame->AddrStack.Offset = context->Esp;
-                frame->AddrFrame.Offset = context->Ebp;
-                if (frame->AddrReturn.Offset != context->Eip)
+                frame->AddrStack.Offset = context->x86.Esp;
+                frame->AddrFrame.Offset = context->x86.Ebp;
+                if (frame->AddrReturn.Offset != context->x86.Eip)
                     FIXME("new PC=%s different from Eip=%x\n",
-                          wine_dbgstr_longlong(frame->AddrReturn.Offset), 
context->Eip);
-                frame->AddrPC.Offset = context->Eip;
-#endif
+                          wine_dbgstr_longlong(frame->AddrReturn.Offset), 
context->x86.Eip);
+                frame->AddrPC.Offset = context->x86.Eip;
             }
         }
     }
@@ -463,14 +457,13 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CO
             sw_read_mem(csw, p + (2 + i) * sizeof(WORD), &val16, 
sizeof(val16));
             frame->Params[i] = val16;
         }
-#ifdef __i386__
         if (context)
         {
 #define SET(field, seg, reg) \
             switch (frame->field.Mode) \
             { \
-            case AddrModeFlat: context->reg = frame->field.Offset; break; \
-            case AddrMode1616: context->seg = frame->field.Segment; 
context->reg = frame->field.Offset; break; \
+            case AddrModeFlat: context->x86.reg = frame->field.Offset; break; \
+            case AddrMode1616: context->x86.seg = frame->field.Segment; 
context->x86.reg = frame->field.Offset; break; \
             default: assert(0); \
             }
             SET(AddrStack,  SegSs, Esp);
@@ -478,19 +471,17 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame, CO
             SET(AddrReturn, SegCs, Eip);
 #undef SET
         }
-#endif
     }
     else
     {
         unsigned int    i;
-#ifdef __i386__
-        CONTEXT         newctx = *context;
+        union ctx newctx = *context;
 
         if (!fetch_next_frame32(csw, &newctx, frame->AddrPC.Offset - deltapc))
             goto done_err;
         frame->AddrReturn.Mode = AddrModeFlat;
-        frame->AddrReturn.Offset = newctx.Eip;
-#endif
+        frame->AddrReturn.Offset = newctx.x86.Eip;
+
         for (i = 0; i < ARRAY_SIZE(frame->Params); i++)
         {
             sw_read_mem(csw, frame->AddrFrame.Offset + (2 + i) * 
sizeof(DWORD), &val32, sizeof(val32));
@@ -578,9 +569,10 @@ reg: fop   31
     return reg;
 }
 
-static void* i386_fetch_context_reg(CONTEXT* ctx, unsigned regno, unsigned* 
size)
+static void *i386_fetch_context_reg(union ctx *pctx, unsigned regno, unsigned 
*size)
 {
-#ifdef __i386__
+    WOW64_CONTEXT *ctx = &pctx->x86;
+
     switch (regno)
     {
     case CV_REG_EAX: *size = sizeof(ctx->Eax); return &ctx->Eax;
@@ -621,7 +613,6 @@ static void* i386_fetch_context_reg(CONTEXT* ctx, unsigned 
regno, unsigned* size
     case CV_REG_GS: *size = sizeof(ctx->SegGs); return &ctx->SegGs;
 
     }
-#endif
     FIXME("Unknown register %x\n", regno);
     return NULL;
 }
diff --git a/dll/win32/dbghelp/cpu_ppc.c b/dll/win32/dbghelp/cpu_ppc.c
index a48168594ef..e1e1cb332ca 100644
--- a/dll/win32/dbghelp/cpu_ppc.c
+++ b/dll/win32/dbghelp/cpu_ppc.c
@@ -48,7 +48,8 @@ static BOOL ppc_get_addr(HANDLE hThread, const CONTEXT* ctx,
     return FALSE;
 }
 
-static BOOL ppc_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, 
CONTEXT* context)
+static BOOL ppc_stack_walk(struct cpu_stack_walk* csw, STACKFRAME64 *frame,
+    union ctx *ctx)
 {
     FIXME("not done\n");
     return FALSE;
@@ -60,7 +61,7 @@ static unsigned ppc_map_dwarf_register(unsigned regno, BOOL 
eh_frame)
     return 0;
 }
 
-static void* ppc_fetch_context_reg(CONTEXT* ctx, unsigned regno, unsigned* 
size)
+static void *ppc_fetch_context_reg(union ctx *ctx, unsigned regno, unsigned 
*size)
 {
     FIXME("NIY\n");
     return NULL;
diff --git a/dll/win32/dbghelp/cpu_x86_64.c b/dll/win32/dbghelp/cpu_x86_64.c
index aa659fafe01..1087ce74646 100644
--- a/dll/win32/dbghelp/cpu_x86_64.c
+++ b/dll/win32/dbghelp/cpu_x86_64.c
@@ -574,12 +574,13 @@ static BOOL interpret_function_table_entry(struct 
cpu_stack_walk* csw,
  * modify (at least) context.{rip, rsp, rbp} using unwind information
  * either out of PE exception handlers, debug info (dwarf), or simple stack 
unwind
  */
-static BOOL fetch_next_frame(struct cpu_stack_walk* csw, CONTEXT* context,
+static BOOL fetch_next_frame(struct cpu_stack_walk *csw, union ctx *pcontext,
                              DWORD_PTR curr_pc, void** prtf)
 {
     DWORD_PTR               cfa;
     RUNTIME_FUNCTION*       rtf;
     DWORD64                 base;
+    CONTEXT *context = &pcontext->ctx;
 
     if (!curr_pc || !(base = sw_module_base(csw, curr_pc))) return FALSE;
     rtf = sw_table_access(csw, curr_pc);
@@ -588,7 +589,7 @@ static BOOL fetch_next_frame(struct cpu_stack_walk* csw, 
CONTEXT* context,
     {
         return interpret_function_table_entry(csw, context, rtf, base);
     }
-    else if (dwarf2_virtual_unwind(csw, curr_pc, context, &cfa))
+    else if (dwarf2_virtual_unwind(csw, curr_pc, pcontext, &cfa))
     {
         context->Rsp = cfa;
         TRACE("next function rip=%016lx\n", context->Rip);
@@ -606,7 +607,8 @@ static BOOL fetch_next_frame(struct cpu_stack_walk* csw, 
CONTEXT* context,
         return default_unwind(csw, context);
 }
 
-static BOOL x86_64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 
frame, CONTEXT* context)
+static BOOL x86_64_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
+    union ctx *context)
 {
     unsigned    deltapc = curr_count <= 1 ? 0 : 1;
 
@@ -641,8 +643,8 @@ static BOOL x86_64_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame,
     }
     else
     {
-        if (context->Rsp != frame->AddrStack.Offset) FIXME("inconsistent Stack 
Pointer\n");
-        if (context->Rip != frame->AddrPC.Offset) FIXME("inconsistent 
Instruction Pointer\n");
+        if (context->ctx.Rsp != frame->AddrStack.Offset) FIXME("inconsistent 
Stack Pointer\n");
+        if (context->ctx.Rip != frame->AddrPC.Offset) FIXME("inconsistent 
Instruction Pointer\n");
 
         if (frame->AddrReturn.Offset == 0) goto done_err;
         if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc, 
&frame->FuncTableEntry))
@@ -653,17 +655,17 @@ static BOOL x86_64_stack_walk(struct cpu_stack_walk* csw, 
LPSTACKFRAME64 frame,
     memset(&frame->Params, 0, sizeof(frame->Params));
 
     /* set frame information */
-    frame->AddrStack.Offset = context->Rsp;
-    frame->AddrFrame.Offset = context->Rbp;
-    frame->AddrPC.Offset = context->Rip;
+    frame->AddrStack.Offset = context->ctx.Rsp;
+    frame->AddrFrame.Offset = context->ctx.Rbp;
+    frame->AddrPC.Offset = context->ctx.Rip;
     if (1)
     {
-        CONTEXT         newctx = *context;
+        union ctx newctx = *context;
 
         if (!fetch_next_frame(csw, &newctx, frame->AddrPC.Offset - deltapc, 
NULL))
             goto done_err;
         frame->AddrReturn.Mode = AddrModeFlat;
-        frame->AddrReturn.Offset = newctx.Rip;
+        frame->AddrReturn.Offset = newctx.ctx.Rip;
     }
 
     frame->Far = TRUE;
@@ -685,7 +687,8 @@ done_err:
     return FALSE;
 }
 #else
-static BOOL x86_64_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 
frame, CONTEXT* context)
+static BOOL x86_64_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
+    union ctx *ctx)
 {
     return FALSE;
 }
@@ -775,9 +778,11 @@ static unsigned x86_64_map_dwarf_register(unsigned regno, 
BOOL eh_frame)
     return reg;
 }
 
-static void* x86_64_fetch_context_reg(CONTEXT* ctx, unsigned regno, unsigned* 
size)
+static void *x86_64_fetch_context_reg(union ctx *pctx, unsigned regno, 
unsigned *size)
 {
 #ifdef __x86_64__
+    CONTEXT *ctx = &pctx->ctx;
+
     switch (regno)
     {
     case CV_AMD64_RAX: *size = sizeof(ctx->Rax); return &ctx->Rax;
diff --git a/dll/win32/dbghelp/dbghelp_private.h 
b/dll/win32/dbghelp/dbghelp_private.h
index 21198f400ab..6746494077a 100644
--- a/dll/win32/dbghelp/dbghelp_private.h
+++ b/dll/win32/dbghelp/dbghelp_private.h
@@ -541,6 +541,12 @@ struct dump_context
     MINIDUMP_CALLBACK_INFORMATION*      cb;
 };
 
+union ctx
+{
+    CONTEXT ctx;
+    WOW64_CONTEXT x86;
+};
+
 enum cpu_addr {cpu_addr_pc, cpu_addr_stack, cpu_addr_frame};
 struct cpu
 {
@@ -553,7 +559,8 @@ struct cpu
                             enum cpu_addr, ADDRESS64* addr);
 
     /* stack manipulation */
-    BOOL        (*stack_walk)(struct cpu_stack_walk* csw, LPSTACKFRAME64 
frame, CONTEXT* context);
+    BOOL        (*stack_walk)(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
+                              union ctx *ctx);
 
     /* module manipulation */
     void*       (*find_runtime_function)(struct module*, DWORD64 addr);
@@ -562,7 +569,7 @@ struct cpu
     unsigned    (*map_dwarf_register)(unsigned regno, BOOL eh_frame);
 
     /* context related manipulation */
-    void*       (*fetch_context_reg)(CONTEXT* context, unsigned regno, 
unsigned* size);
+    void *      (*fetch_context_reg)(union ctx *ctx, unsigned regno, unsigned 
*size);
     const char* (*fetch_regname)(unsigned regno);
 
     /* minidump per CPU extension */
@@ -677,8 +684,8 @@ struct pdb_cmd_pair {
     const char*         name;
     DWORD*              pvalue;
 };
-extern BOOL         pdb_virtual_unwind(struct cpu_stack_walk* csw, DWORD_PTR 
ip,
-                                       CONTEXT* context, struct pdb_cmd_pair* 
cpair) DECLSPEC_HIDDEN;
+extern BOOL pdb_virtual_unwind(struct cpu_stack_walk *csw, DWORD_PTR ip,
+    union ctx *context, struct pdb_cmd_pair *cpair) DECLSPEC_HIDDEN;
 
 /* path.c */
 extern BOOL         path_find_symbol_file(const struct process* pcs, const 
struct module* module,
@@ -716,8 +723,8 @@ extern BOOL         stabs_parse(struct module* module, 
unsigned long load_offset
 extern BOOL         dwarf2_parse(struct module* module, unsigned long 
load_offset,
                                  const struct elf_thunk_area* thunks,
                                  struct image_file_map* fmap) DECLSPEC_HIDDEN;
-extern BOOL         dwarf2_virtual_unwind(struct cpu_stack_walk* csw, 
DWORD_PTR ip,
-                                          CONTEXT* context, ULONG_PTR* cfa) 
DECLSPEC_HIDDEN;
+extern BOOL dwarf2_virtual_unwind(struct cpu_stack_walk *csw, DWORD_PTR ip,
+    union ctx *ctx, ULONG_PTR *cfa) DECLSPEC_HIDDEN;
 
 /* rsym.c */
 extern BOOL         rsym_parse(struct module* module, unsigned long 
load_offset,
diff --git a/dll/win32/dbghelp/dwarf.c b/dll/win32/dbghelp/dwarf.c
index 14b4a8594c7..b075bd0a591 100644
--- a/dll/win32/dbghelp/dwarf.c
+++ b/dll/win32/dbghelp/dwarf.c
@@ -3031,7 +3031,7 @@ static void 
execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
 }
 
 /* retrieve a context register from its dwarf number */
-static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
+static ULONG_PTR get_context_reg(union ctx *context, ULONG_PTR dw_reg)
 {
     unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz;
     ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, 
&sz);
@@ -3045,8 +3045,8 @@ static ULONG_PTR get_context_reg(CONTEXT *context, 
ULONG_PTR dw_reg)
 }
 
 /* set a context register from its dwarf number */
-static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, 
ULONG_PTR dw_reg,
-                            ULONG_PTR val, BOOL isdebuggee)
+static void set_context_reg(struct cpu_stack_walk* csw, union ctx *context,
+    ULONG_PTR dw_reg, ULONG_PTR val, BOOL isdebuggee)
 {
     unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz;
     ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, 
&sz);
@@ -3079,7 +3079,8 @@ static void set_context_reg(struct cpu_stack_walk* csw, 
CONTEXT *context, ULONG_
 }
 
 /* copy a register from one context to another using dwarf number */
-static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* 
srccontext, ULONG_PTR dwregsrc)
+static void copy_context_reg(union ctx *dstcontext, ULONG_PTR dwregdst,
+                             union ctx *srccontext, ULONG_PTR dwregsrc)
 {
     unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst, 
TRUE), szdst;
     unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc, 
TRUE), szsrc;
@@ -3096,7 +3097,7 @@ static void copy_context_reg(CONTEXT *dstcontext, 
ULONG_PTR dwregdst, CONTEXT* s
 }
 
 static ULONG_PTR eval_expression(const struct module* module, struct 
cpu_stack_walk* csw,
-                                 const unsigned char* zp, CONTEXT *context)
+                                 const unsigned char* zp, union ctx *context)
 {
     dwarf2_traverse_context_t    ctx;
     ULONG_PTR reg, sz, tmp, stack[64];
@@ -3207,11 +3208,11 @@ static ULONG_PTR eval_expression(const struct module* 
module, struct cpu_stack_w
 }
 
 static void apply_frame_state(const struct module* module, struct 
cpu_stack_walk* csw,
-                              CONTEXT *context, struct frame_state *state, 
ULONG_PTR* cfa)
+                              union ctx *context, struct frame_state *state, 
ULONG_PTR* cfa)
 {
     unsigned int i;
     ULONG_PTR value;
-    CONTEXT new_context = *context;
+    union ctx new_context = *context;
 
     switch (state->cfa_rule)
     {
@@ -3263,7 +3264,8 @@ static void apply_frame_state(const struct module* 
module, struct cpu_stack_walk
  *           dwarf2_virtual_unwind
  *
  */
-BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* 
context, ULONG_PTR* cfa)
+BOOL dwarf2_virtual_unwind(struct cpu_stack_walk *csw, ULONG_PTR ip,
+    union ctx *context, ULONG_PTR *cfa)
 {
     struct module_pair pair;
     struct frame_info info;
diff --git a/dll/win32/dbghelp/msc.c b/dll/win32/dbghelp/msc.c
index 62cd390ccd7..16c350184df 100644
--- a/dll/win32/dbghelp/msc.c
+++ b/dll/win32/dbghelp/msc.c
@@ -3199,8 +3199,8 @@ done:
     return FALSE;
 }
 
-BOOL         pdb_virtual_unwind(struct cpu_stack_walk* csw, DWORD_PTR ip,
-                                CONTEXT* context, struct pdb_cmd_pair* cpair)
+BOOL pdb_virtual_unwind(struct cpu_stack_walk *csw, DWORD_PTR ip,
+    union ctx *context, struct pdb_cmd_pair *cpair)
 {
     struct module_pair          pair;
     struct pdb_module_info*     pdb_info;
diff --git a/sdk/tools/winesync/dbghelp.cfg b/sdk/tools/winesync/dbghelp.cfg
index 9ca733f7598..f3ce74f8425 100644
--- a/sdk/tools/winesync/dbghelp.cfg
+++ b/sdk/tools/winesync/dbghelp.cfg
@@ -3,4 +3,4 @@ directories:
 files:
   include/dbghelp.h: sdk/include/psdk/dbghelp.h
 tags:
-  wine: 3ff8fa7ed1d28b38703125b0c8c632410e3fd980
+  wine: 3ce304e60100962503bcded0adb69659f849d1b4

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