Changeset df91be5 in mainline for arch/sparc64/include/context.h

Timestamp:

2005-10-30T17:29:08Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

0e90b4e

Parents:

437ee6a4

Message:

sparc64 work.
Adjust context_set() to be SCD compliant.

File:

• arch/sparc64/include/context.h (modified) (2 diffs)

arch/sparc64/include/context.h

@@ -38 +38 @@
 #endif
 
-#define STACK_ALIGNMENT                 8
-#define STACK_ITEM_SIZE                 8
+/** According to SPARC Compliance Definition, every stack frame is 16-byte aligned. */
+#define STACK_ALIGNMENT                 16
 
-/*
- * One item is put onto the stack to support get_stack_base().
+#define STACK_ITEM_SIZE                 sizeof(__u64)
+
+/**
+ * 16-extended-word save area for %i[0-7] and %l[0-7] registers.
  */
-#define SP_DELTA        (0+STACK_ITEM_SIZE)
+#define SAVE_AREA       (16*STACK_ITEM_SIZE)
+#define SP_DELTA        SAVE_AREA
+
+/**
+ * By convention, the actual top of the stack is %sp + BIAS.
+ */
+#define BIAS            2047
 
 #ifdef context_set
@@ -52 +60 @@
 #define context_set(c, _pc, stack, size)                                                                \
         (c)->pc = ((__address) _pc) - 8;                                                                \
-        (c)->sp = ((__address) stack) + (ALIGN((size), STACK_ALIGNMENT) + 1) - SP_DELTA;                        
+        (c)->sp = ((__address) stack) + ALIGN((size), STACK_ALIGNMENT) - (BIAS + SP_DELTA)
 
 /*