Static tramp v5 (#624)

[platform/upstream/libffi.git] / src / x86 / ffi.c

diff --git a/src/x86/ffi.c b/src/x86/ffi.c
index 5f7fd81..b4d0d39 100644 (file)
--- a/src/x86/ffi.c
+++ b/src/x86/ffi.c
@@ -34,6 +34,7 @@
 #include <ffi_common.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include <tramp.h>
 #include "internal.h"
 
 /* Force FFI_TYPE_LONGDOUBLE to be different than FFI_TYPE_DOUBLE;
@@ -411,6 +412,11 @@ ffi_call_go (ffi_cif *cif, void (*fn)(void), void *rvalue,
 void FFI_HIDDEN ffi_closure_i386(void);
 void FFI_HIDDEN ffi_closure_STDCALL(void);
 void FFI_HIDDEN ffi_closure_REGISTER(void);
+#if defined(FFI_EXEC_STATIC_TRAMP)
+void FFI_HIDDEN ffi_closure_i386_alt(void);
+void FFI_HIDDEN ffi_closure_STDCALL_alt(void);
+void FFI_HIDDEN ffi_closure_REGISTER_alt(void);
+#endif
 
 struct closure_frame
 {
@@ -559,6 +565,22 @@ ffi_prep_closure_loc (ffi_closure* closure,
       return FFI_BAD_ABI;
     }
 
+#if defined(FFI_EXEC_STATIC_TRAMP)
+  if (ffi_tramp_is_present(closure))
+    {
+      /* Initialize the static trampoline's parameters. */
+      if (dest == ffi_closure_i386)
+        dest = ffi_closure_i386_alt;
+      else if (dest == ffi_closure_STDCALL)
+        dest = ffi_closure_STDCALL_alt;
+      else
+        dest = ffi_closure_REGISTER_alt;
+      ffi_tramp_set_parms (closure->ftramp, dest, closure);
+      goto out;
+    }
+#endif
+
+  /* Initialize the dynamic trampoline. */
   /* endbr32.  */
   *(UINT32 *) tramp = 0xfb1e0ff3;
 
@@ -570,6 +592,7 @@ ffi_prep_closure_loc (ffi_closure* closure,
   tramp[9] = 0xe9;
   *(unsigned *)(tramp + 10) = (unsigned)dest - ((unsigned)codeloc + 14);
 
+out:
   closure->cif = cif;
   closure->fun = fun;
   closure->user_data = user_data;
@@ -767,4 +790,17 @@ ffi_raw_call(ffi_cif *cif, void (*fn)(void), void *rvalue, ffi_raw *avalue)
   ffi_call_i386 (frame, stack);
 }
 #endif /* !FFI_NO_RAW_API */
+
+#if defined(FFI_EXEC_STATIC_TRAMP)
+void *
+ffi_tramp_arch (size_t *tramp_size, size_t *map_size)
+{
+  extern void *trampoline_code_table;
+
+  *map_size = X86_TRAMP_MAP_SIZE;
+  *tramp_size = X86_TRAMP_SIZE;
+  return &trampoline_code_table;
+}
+#endif
+
 #endif /* __i386__ */