(INITIALIZE_TRAMPOLINE): Pass both the starting and ending

addresses of the trampoline to the cacheflush pattern.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@4484 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h
index 84ebc37..ef9e305 100644 (file)
--- a/gcc/config/pa/pa.h
+++ b/gcc/config/pa/pa.h
@@ -979,8 +979,13 @@ extern union tree_node *current_function_decl;
 }
 
 /* Length in units of the trampoline for entering a nested function.
-   If this grows to > 32 bytes, then you must update the flushcache
-   pattern in pa.md.  */
+
+   Flush the cache entries corresponding to the first and last addresses
+   of the trampoline.  This is necessary as the trampoline may cross two
+   cache lines.  
+
+   If the trampoline ever grows to > 32 bytes, then it will become
+   necessary to hack on the cacheflush pattern in pa.md.  */
 
 #define TRAMPOLINE_SIZE (5 * 4)
 
@@ -993,16 +998,17 @@ extern union tree_node *current_function_decl;
 
 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
 {                                                              \
-  rtx addr, mem;                                               \
+  rtx start_addr, end_addr, mem;                               \
                                                                \
-  addr = memory_address (Pmode, plus_constant ((TRAMP), 12));  \
-  emit_move_insn (gen_rtx (MEM, Pmode, addr), (FNADDR));       \
-  addr = memory_address (Pmode, plus_constant ((TRAMP), 16));  \
-  emit_move_insn (gen_rtx (MEM, Pmode, addr), (CXT));          \
+  start_addr = memory_address (Pmode, plus_constant ((TRAMP), 12));\
+  emit_move_insn (gen_rtx (MEM, Pmode, start_addr), (FNADDR)); \
+  start_addr = memory_address (Pmode, plus_constant ((TRAMP), 16));\
+  emit_move_insn (gen_rtx (MEM, Pmode, start_addr), (CXT));    \
   /* fdc and fic only use registers for the address to flush,  \
      they do not accept integer displacements.  */             \
-  addr = force_reg (SImode, (TRAMP));                          \
-  emit_insn (gen_cacheflush (addr));                           \
+  start_addr = force_reg (SImode, (TRAMP));                    \
+  end_addr = force_reg (SImode, plus_constant (start_addr, TRAMPOLINE_SIZE));\
+  emit_insn (gen_cacheflush (start_addr, end_addr));           \
 }
 
 /* Emit code for a call to builtin_saveregs.  We must emit USE insns which