2004-05-17 Andrew Cagney <cagney@redhat.com>

[deliverable/binutils-gdb.git] / gdb / amd64-nat.c

diff --git a/gdb/amd64-nat.c b/gdb/amd64-nat.c
index 81a87b69e4497b871f6dad868d2e809660f30ad9..31b360377be06cb3211ab3a2aaae3ae01abfb644 100644 (file)
--- a/gdb/amd64-nat.c
+++ b/gdb/amd64-nat.c
@@ -24,6 +24,7 @@
 #include "regcache.h"
 
 #include "gdb_assert.h"
+#include "gdb_string.h"
 
 #include "i386-tdep.h"
 #include "amd64-tdep.h"
@@ -128,7 +129,23 @@ amd64_collect_native_gregset (const struct regcache *regcache,
   int i;
 
   if (gdbarch_ptr_bit (gdbarch) == 32)
-    num_regs = amd64_native_gregset32_num_regs;
+    {
+      num_regs = amd64_native_gregset32_num_regs;
+
+      /* Make sure %eax, %ebx, %ecx, %edx, %esi, %edi, %ebp, %esp and
+         %eip get zero-extended to 64 bits.  */
+      for (i = 0; i <= I386_EIP_REGNUM; i++)
+       {
+         if (regnum == -1 || regnum == i)
+           memset (regs + amd64_native_gregset_reg_offset (i), 0, 8);
+       }
+      /* Ditto for %cs, %ss, %ds, %es, %fs, and %gs.  */
+      for (i = I386_CS_REGNUM; i <= I386_GS_REGNUM; i++)
+       {
+         if (regnum == -1 || regnum == i)
+           memset (regs + amd64_native_gregset_reg_offset (i), 0, 8);
+       }
+    }
 
   if (num_regs > NUM_REGS)
     num_regs = NUM_REGS;