Eric Pouech : winedbg: Set first LDT entry value as ntdll does.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 91ba80df262b93b9a5edabd7cc0259fcbedf51d4
URL:    https://gitlab.winehq.org/wine/wine/-/commit/91ba80df262b93b9a5edabd7cc0259f...

Author: Eric Pouech <epouech(a)codeweavers.com>
Date:   Fri Oct 13 09:58:23 2023 +0200

winedbg: Set first LDT entry value as ntdll does.

Signed-off-by: Eric Pouech <epouech(a)codeweavers.com>

---

 programs/winedbg/be_i386.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/programs/winedbg/be_i386.c b/programs/winedbg/be_i386.c
index 503a182641d..9f22dd5f3d4 100644
--- a/programs/winedbg/be_i386.c
+++ b/programs/winedbg/be_i386.c
@@ -30,13 +30,15 @@ WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
 
 #define IS_VM86_MODE(ctx) (ctx->EFlags & V86_FLAG)
 
+static const unsigned first_ldt_entry = 32;
+
 static ADDRESS_MODE get_selector_type(HANDLE hThread, const WOW64_CONTEXT *ctx, WORD sel)
 {
     LDT_ENTRY	le;
 
     if (IS_VM86_MODE(ctx)) return AddrModeReal;
     /* null or system selector */
-    if (!(sel & 4) || ((sel >> 3) < 17)) return AddrModeFlat;
+    if (!(sel & 4) || ((sel >> 3) < first_ldt_entry)) return AddrModeFlat;
     if (dbg_curr_process->process_io->get_selector(hThread, sel, &le))
         return le.HighWord.Bits.Default_Big ? AddrMode1632 : AddrMode1616;
     /* selector doesn't exist */
@@ -52,7 +54,7 @@ static void* be_i386_linearize(HANDLE hThread, const ADDRESS64* addr)
     case AddrModeReal:
         return (void*)((DWORD_PTR)(LOWORD(addr->Segment) << 4) + (DWORD_PTR)addr->Offset);
     case AddrMode1632:
-        if (!(addr->Segment & 4) || ((addr->Segment >> 3) < 17))
+        if (!(addr->Segment & 4) || ((addr->Segment >> 3) < first_ldt_entry))
             return (void*)(DWORD_PTR)addr->Offset;
         /* fall through */
     case AddrMode1616: