FFI: Add callback support (for x86/x64).

1 files changed, 5 insertions, 1 deletions

diff --git a/src/lj_ccall.h b/src/lj_ccall.h
index 14f61924..0641625f 100644
--- a/src/lj_ccall.h
+++ b/src/lj_ccall.h
@@ -81,7 +81,7 @@ typedef double FPRArg;
 typedef intptr_t GPRArg;
 
 #else
-#error "missing calling convention definitions for this architecture"
+#error "Missing calling convention definitions for this architecture"
 #endif
 
 #ifndef CCALL_SPS_EXTRA
@@ -99,6 +99,10 @@ typedef intptr_t GPRArg;
 #define CCALL_NUM_FPR \
   (CCALL_NARG_FPR > CCALL_NRET_FPR ? CCALL_NARG_FPR : CCALL_NRET_FPR)
 
+/* Check against constants in lj_ctype.h. */
+LJ_STATIC_ASSERT(CCALL_NUM_GPR <= CCALL_MAX_GPR);
+LJ_STATIC_ASSERT(CCALL_NUM_FPR <= CCALL_MAX_FPR);
+
 #define CCALL_MAXSTACK          32
 
 /* -- C call state -------------------------------------------------------- */