ChangeLog:

	* spu-multiarch.c (spu_xfer_partial): Wrap around local store
	limit on local store memory accesses.
	* spu-linux-nat.c (spu_xfer_partial): Likewise.
	* spu-tdep.c (spu_lslr): Remove.
	(spu_pointer_to_address): Do not truncate addresses.
	(spu_integer_to_address): Likewise.
	(spu_overlay_new_objfile): Use SPU_OVERLAY_LMA.
	* spu-tdep.h: Add comments.
	(SPUADDR_SPU): Respect SPU_OVERLAY_LMA bit.
	(SPU_OVERLAY_LMA): Define.

gdbserver/ChangeLog:

	* spu-low.c (spu_read_memory): Wrap around local store limit.
	(spu_write_memory): Likewise.

testsuite/ChangeLog:

	* gdb.arch/spu-ls.exp: New file.
	* gdb.arch/spu-ls.c: Likewise.

2 files changed, 41 insertions, 2 deletions

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 6b9f493..06c63430 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,8 @@
+2010-06-19  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* spu-low.c (spu_read_memory): Wrap around local store limit.
+	(spu_write_memory): Likewise.
+
 2010-06-15  Pedro Alves  <pedro@codesourcery.com>
 
 	* linux-x86-low.c (amd64_emit_const, amd64_emit_void_call_2)
diff --git a/gdb/gdbserver/spu-low.c b/gdb/gdbserver/spu-low.c
index d9ac815..2188d64 100644
--- a/gdb/gdbserver/spu-low.c
+++ b/gdb/gdbserver/spu-low.c
@@ -561,7 +561,8 @@ spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
 {
   int fd, ret;
   CORE_ADDR addr;
-  char annex[32];
+  char annex[32], lslr_annex[32], buf[32];
+  CORE_ADDR lslr;
 
   /* We must be stopped on a spu_run system call.  */
   if (!parse_spufs_run (&fd, &addr))
@@ -570,6 +571,22 @@ spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
   /* Use the "mem" spufs file to access SPU local store.  */
   sprintf (annex, "%d/mem", fd);
   ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len);
+  if (ret > 0)
+    return ret == len ? 0 : EIO;
+
+  /* SPU local store access wraps the address around at the
+     local store limit.  We emulate this here.  To avoid needing
+     an extra access to retrieve the LSLR, we only do that after
+     trying the original address first, and getting end-of-file.  */
+  sprintf (lslr_annex, "%d/lslr", fd);
+  memset (buf, 0, sizeof buf);
+  if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
+			 0, sizeof buf) <= 0)
+    return ret;
+
+  lslr = strtoul (buf, NULL, 16);
+  ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len);
+
   return ret == len ? 0 : EIO;
 }
 
@@ -582,7 +599,8 @@ spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
 {
   int fd, ret;
   CORE_ADDR addr;
-  char annex[32];
+  char annex[32], lslr_annex[32], buf[32];
+  CORE_ADDR lslr;
 
   /* We must be stopped on a spu_run system call.  */
   if (!parse_spufs_run (&fd, &addr))
@@ -591,6 +609,22 @@ spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
   /* Use the "mem" spufs file to access SPU local store.  */
   sprintf (annex, "%d/mem", fd);
   ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len);
+  if (ret > 0)
+    return ret == len ? 0 : EIO;
+
+  /* SPU local store access wraps the address around at the
+     local store limit.  We emulate this here.  To avoid needing
+     an extra access to retrieve the LSLR, we only do that after
+     trying the original address first, and getting end-of-file.  */
+  sprintf (lslr_annex, "%d/lslr", fd);
+  memset (buf, 0, sizeof buf);
+  if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
+			 0, sizeof buf) <= 0)
+    return ret;
+
+  lslr = strtoul (buf, NULL, 16);
+  ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len);
+
   return ret == len ? 0 : EIO;
 }