* d10v-tdep.c (d10v_extract_return_value): Wierd. GCC wants to return

odd sized register quantities with only half of the first register used!
* config/d10v/tm-d10v.h (USE_STRUCT_CONVENTION): Use stack when size > 8.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 3f91ef4..d8e2a19 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+Mon Feb 16 14:05:54 1998  Andrew Cagney  <cagney@b1.cygnus.com>
+
+       * d10v-tdep.c (d10v_extract_return_value): Wierd.  GCC wants to
+       return odd sized register quantities with only half of the first
+       register used!
+
+       * config/d10v/tm-d10v.h (USE_STRUCT_CONVENTION): Use stack when
+       size > 8.
+
 Mon Mar 30 16:42:12 1998  Jason Molenda  (crash@bugshack.cygnus.com)
 
        * rdi-share/Makefile.am, rdi-share/aclocal.m4,

diff --git a/gdb/config/d10v/tm-d10v.h b/gdb/config/d10v/tm-d10v.h
index 93c634c..0a4c3b4 100644 (file)
--- a/gdb/config/d10v/tm-d10v.h
+++ b/gdb/config/d10v/tm-d10v.h
@@ -187,7 +187,7 @@ extern CORE_ADDR d10v_skip_prologue ();
    registers. */
 
 #define USE_STRUCT_CONVENTION(gcc_p, type) \
-   (TYPE_LENGTH (type) > 1)
+   (TYPE_LENGTH (type) > 8)
 
 \f
 

diff --git a/gdb/d10v-tdep.c b/gdb/d10v-tdep.c
index 6e57891..10d249b 100644 (file)
--- a/gdb/d10v-tdep.c
+++ b/gdb/d10v-tdep.c
@@ -654,8 +654,17 @@ d10v_extract_return_value (type, regbuf, valbuf)
          unsigned short c = extract_unsigned_integer (regbuf + REGISTER_BYTE (RET1_REGNUM), REGISTER_RAW_SIZE (RET1_REGNUM));
          store_unsigned_integer (valbuf, 1, c);
        }
-      else
+      else if ((len & 1) == 0)
        memcpy (valbuf, regbuf + REGISTER_BYTE (RET1_REGNUM), len);
+      else
+       {
+         /* For return values of odd size, the first byte is in the
+             least significant part of the first register.  The
+             remaining bytes in remaining registers. Interestingly,
+             when such values are passed in, the last byte is in the
+             most significant byte of that same register - wierd. */
+         memcpy (valbuf, regbuf + REGISTER_BYTE (RET1_REGNUM) + 1, len);
+       }
     }
 }