From 6c05ef1e11c64d4c6eeddf105ad8e8692182d57c Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Fri, 26 Apr 1996 11:56:25 +0000
Subject: [PATCH] (getdefdir) [DJGPP > 1]: Use 32-bit ESI to pass buffer
 address to `intdos' instead of SI which can be 16-bit.

---
 src/msdos.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/msdos.c b/src/msdos.c
index 05f5f4670e4..c90e9766579 100644
--- a/src/msdos.c
+++ b/src/msdos.c
@@ -2093,7 +2093,14 @@ getdefdir (drive, dst)
 
   *dst++ = '/';
   regs.h.dl = drive;
+#if __DJGPP__ > 1
+  /* regs.x.si can be 16 or 32 bits, depending on whether _NAIVE_DOS_REGS
+     or _BORLAND_DOS_REGS have or haven't been defined.  We should work
+     with either, so use regs.d.esi which is always 32 bit-wide.  */
+  regs.d.esi = (int) dst;
+#else
   regs.x.si = (int) dst;
+#endif
   regs.h.ah = 0x47;
   intdos (&regs, &regs);
   return !regs.x.cflag;
-- 
2.39.2