Static tramp v5 (#624)

[platform/upstream/libffi.git] / src / aarch64 / ffi.c

diff --git a/src/aarch64/ffi.c b/src/aarch64/ffi.c
index ef09f4d..8e24a96 100644 (file)
--- a/src/aarch64/ffi.c
+++ b/src/aarch64/ffi.c
@@ -30,6 +30,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #ifdef _WIN32
 #include <windows.h> /* FlushInstructionCache */
 #endif
+#include <tramp.h>
 
 /* Force FFI_TYPE_LONGDOUBLE to be different than FFI_TYPE_DOUBLE;
    all further uses in this file will refer to the 128-bit type.  */
@@ -782,6 +783,10 @@ ffi_call_go (ffi_cif *cif, void (*fn) (void), void *rvalue,
 
 extern void ffi_closure_SYSV (void) FFI_HIDDEN;
 extern void ffi_closure_SYSV_V (void) FFI_HIDDEN;
+#if defined(FFI_EXEC_STATIC_TRAMP)
+extern void ffi_closure_SYSV_alt (void) FFI_HIDDEN;
+extern void ffi_closure_SYSV_V_alt (void) FFI_HIDDEN;
+#endif
 
 ffi_status
 ffi_prep_closure_loc (ffi_closure *closure,
@@ -816,7 +821,21 @@ ffi_prep_closure_loc (ffi_closure *closure,
     0x00, 0x02, 0x1f, 0xd6     /* br   x16             */
   };
   char *tramp = closure->tramp;
-  
+
+#if defined(FFI_EXEC_STATIC_TRAMP)
+  if (ffi_tramp_is_present(closure))
+    {
+      /* Initialize the static trampoline's parameters. */
+      if (start == ffi_closure_SYSV_V)
+          start = ffi_closure_SYSV_V_alt;
+      else
+          start = ffi_closure_SYSV_alt;
+      ffi_tramp_set_parms (closure->ftramp, start, closure);
+      goto out;
+    }
+#endif
+
+  /* Initialize the dynamic trampoline. */
   memcpy (tramp, trampoline, sizeof(trampoline));
   
   *(UINT64 *)(tramp + 16) = (uintptr_t)start;
@@ -832,6 +851,7 @@ ffi_prep_closure_loc (ffi_closure *closure,
   unsigned char *tramp_code = ffi_data_to_code_pointer (tramp);
   #endif
   ffi_clear_cache (tramp_code, tramp_code + FFI_TRAMPOLINE_SIZE);
+out:
 #endif
 
   closure->cif = cif;
@@ -1022,4 +1042,16 @@ ffi_closure_SYSV_inner (ffi_cif *cif,
   return flags;
 }
 
+#if defined(FFI_EXEC_STATIC_TRAMP)
+void *
+ffi_tramp_arch (size_t *tramp_size, size_t *map_size)
+{
+  extern void *trampoline_code_table;
+
+  *tramp_size = AARCH64_TRAMP_SIZE;
+  *map_size = AARCH64_TRAMP_MAP_SIZE;
+  return &trampoline_code_table;
+}
+#endif
+
 #endif /* (__aarch64__) || defined(__arm64__)|| defined (_M_ARM64)*/