1 files changed, 4 insertions, 3 deletions

diff --git a/src/lj_ccall.h b/src/lj_ccall.h
index 547415f7..57300817 100644
--- a/src/lj_ccall.h
+++ b/src/lj_ccall.h
@@ -152,14 +152,15 @@ typedef union FPRArg {
 LJ_STATIC_ASSERT(CCALL_NUM_GPR <= CCALL_MAX_GPR);
 LJ_STATIC_ASSERT(CCALL_NUM_FPR <= CCALL_MAX_FPR);
 
-#define CCALL_MAXSTACK          32
+#define CCALL_NUM_STACK         31
+#define CCALL_SIZE_STACK        (CCALL_NUM_STACK * CTSIZE_PTR)
 
 /* -- C call state -------------------------------------------------------- */
 
 typedef LJ_ALIGN(CCALL_ALIGN_CALLSTATE) struct CCallState {
   void (*func)(void);           /* Pointer to called function. */
   uint32_t spadj;               /* Stack pointer adjustment. */
-  uint8_t nsp;                  /* Number of stack slots. */
+  uint8_t nsp;                  /* Number of bytes on stack. */
   uint8_t retref;               /* Return value by reference. */
 #if LJ_TARGET_X64
   uint8_t ngpr;                 /* Number of arguments in GPRs. */
@@ -178,7 +179,7 @@ typedef LJ_ALIGN(CCALL_ALIGN_CALLSTATE) struct CCallState {
   FPRArg fpr[CCALL_NUM_FPR];    /* Arguments/results in FPRs. */
 #endif
   GPRArg gpr[CCALL_NUM_GPR];    /* Arguments/results in GPRs. */
-  GPRArg stack[CCALL_MAXSTACK]; /* Stack slots. */
+  GPRArg stack[CCALL_NUM_STACK];        /* Stack slots. */
 } CCallState;
 
 /* -- C call handling ----------------------------------------------------- */