winedbg: Added a way to support differently selector information depending on current target.

programs/winedbg/be_i386.c

@@ -40,7 +40,7 @@ static ADDRESS_MODE get_selector_type(HANDLE hThread, const CONTEXT* ctx, WORD s
     if (IS_VM86_MODE(ctx)) return AddrModeReal;
     /* null or system selector */
     if (!(sel & 4) || ((sel >> 3) < 17)) return AddrModeFlat;
-    if (GetThreadSelectorEntry(hThread, sel, &le))
+    if (dbg_curr_process->process_io->get_selector(hThread, sel, &le))
         return le.HighWord.Bits.Default_Big ? AddrMode1632 : AddrMode1616;
     /* selector doesn't exist */
     return -1;
@@ -59,7 +59,7 @@ static void* be_i386_linearize(HANDLE hThread, const ADDRESS64* addr)
             return (void*)(DWORD)addr->Offset;
         /* fall through */
     case AddrMode1616:
-        if (!GetThreadSelectorEntry(hThread, addr->Segment, &le)) return NULL;
+        if (!dbg_curr_process->process_io->get_selector(hThread, addr->Segment, &le)) return NULL;
         return (void*)((le.HighWord.Bits.BaseHi << 24) + 
                        (le.HighWord.Bits.BaseMid << 16) + le.BaseLow +
                        (DWORD)addr->Offset);

programs/winedbg/debugger.h

@@ -234,6 +234,7 @@ struct be_process_io
     BOOL        (*close_process)(struct dbg_process*, BOOL);
     BOOL        (WINAPI *read)(HANDLE, const void*, void*, SIZE_T, SIZE_T*);
     BOOL        (WINAPI *write)(HANDLE, void*, const void*, SIZE_T, SIZE_T*);
+    BOOL        (WINAPI *get_selector)(HANDLE, DWORD, LDT_ENTRY*);
 };
 
 extern	struct dbg_process*	dbg_curr_process;

programs/winedbg/info.c

@@ -584,7 +584,7 @@ void info_win32_segments(DWORD start, int length)
 
     for (i = start; i < start + length; i++)
     {
-        if (!GetThreadSelectorEntry(dbg_curr_thread->handle, (i << 3) | 7, &le))
+        if (!dbg_curr_process->process_io->get_selector(dbg_curr_thread->handle, (i << 3) | 7, &le))
             continue;
 
         if (le.HighWord.Bits.Type & 0x08)

programs/winedbg/tgt_active.c

@@ -984,4 +984,5 @@ static struct be_process_io be_process_active_io =
     tgt_process_active_close_process,
     ReadProcessMemory,
     WriteProcessMemory,
+    GetThreadSelectorEntry,
 };

programs/winedbg/tgt_minidump.c

@@ -452,9 +452,18 @@ static BOOL tgt_process_minidump_close_process(struct dbg_process* pcs, BOOL kil
     return TRUE;
 }
 
+static BOOL WINAPI tgt_process_minidump_get_selector(HANDLE hThread, DWORD sel, LDT_ENTRY* le)
+{
+    /* so far, pretend all selectors are valid, and mapped to a 32bit flat address space */
+    memset(le, 0, sizeof(*le));
+    le->HighWord.Bits.Default_Big = 1;
+    return TRUE;
+}
+
 static struct be_process_io be_process_minidump_io =
 {
     tgt_process_minidump_close_process,
     tgt_process_minidump_read,
     tgt_process_minidump_write,
+    tgt_process_minidump_get_selector,
 };

programs/winedbg/tgt_module.c

@@ -90,9 +90,15 @@ static BOOL tgt_process_module_close_process(struct dbg_process* pcs, BOOL kill)
     return TRUE;
 }
 
+static BOOL WINAPI tgt_process_module_get_selector(HANDLE hThread, DWORD sel, LDT_ENTRY* le)
+{
+    return FALSE;
+}
+
 static struct be_process_io be_process_module_io =
 {
     tgt_process_module_close_process,
     tgt_process_module_read,
     tgt_process_module_write,
+    tgt_process_module_get_selector,
 };