From: Andrew Cagney <cagney@redhat.com>
Date: Wed, 1 Apr 1998 04:52:37 +0000 (+0000)
Subject: * d10v-tdep.c (d10v_extract_return_value): Wierd.  GCC wants to return
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=19735aeaa1575ba240f240391c7c5ba96c576f0c;p=binutils-gdb.git

* 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 3f91ef439a6..d8e2a194fd0 100644
--- 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 93c634c1621..0a4c3b4da3c 100644
--- 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)
 
 
 
diff --git a/gdb/d10v-tdep.c b/gdb/d10v-tdep.c
index 6e5789172d8..10d249be2d2 100644
--- 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);
+	}
     }
 }