xnu-6153.81.5.tar.gz

[apple/xnu.git] / libsyscall / wrappers / varargs_wrappers.s

diff --git a/libsyscall/wrappers/varargs_wrappers.s b/libsyscall/wrappers/varargs_wrappers.s
index bc6d6c3a40bccf28468f761367b831be8c66a01f..fae37a483fc0f5bed890da68789442afd2f8b36e 100644 (file)
--- a/libsyscall/wrappers/varargs_wrappers.s
+++ b/libsyscall/wrappers/varargs_wrappers.s
@@ -21,3 +21,186 @@
  * @APPLE_LICENSE_HEADER_END@
  */
 
+#ifdef __arm64__
+
+#include "../custom/SYS.h"
+#include <mach/arm64/asm.h>
+
+/* 
+ * Stubs are to handle the ARM64 ABI for variadic functions' 
+ * not matching the ABI used by the system call handler.
+ */
+
+/*
+ *     sem_t* sem_open(const char *name, int oflag, ...);
+ *     sem_t* __sem_open(const char *name, int oflag, int mode, int value);
+ */
+MI_ENTRY_POINT(_sem_open) 
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldp     x2, x3, [fp, #16]
+#else
+       ldp     w2, w3, [fp, #16]
+#endif
+       MI_CALL_EXTERNAL(___sem_open)
+#if !__LP64__
+       /* xnu returns a 64-bit '-1' on failure, but pointers must have the high
+        * 32-bits set to zero. The following instruction is equivalent to
+        * masking off the top 32-bits.
+        */
+       mov w0, w0
+#endif
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/*
+ *     int open(const char *name, int oflag, ...);
+ *     int __open(const char *name, int oflag, int mode, int value);
+ */
+MI_ENTRY_POINT(_open) 
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldr     x2, [fp, #16]
+#else
+       ldr     w2, [fp, #16]
+#endif
+       MI_CALL_EXTERNAL(___open)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/*
+ *     int open_nocancel(const char *name, int oflag, ...);
+ *     int __open_nocancel(const char *name, int oflag, int mode);
+ */
+MI_ENTRY_POINT(_open$NOCANCEL) 
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldr     x2, [fp, #16]
+#else
+       ldr     w2, [fp, #16]
+#endif
+       MI_CALL_EXTERNAL(___open_nocancel)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/*
+ *     int openat(int fd,const char *name, int oflag, ...);
+ *     int __openat(int fd, const char *name, int oflag, int mode, int value);
+ */
+MI_ENTRY_POINT(_openat)
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldr     x3, [fp, #16]
+#else
+       ldr     w3, [fp, #16]
+#endif
+       MI_CALL_EXTERNAL(___openat)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/*
+ *     int openat_nocancel(int fd, const char *name, int oflag, ...);
+ *     int __openat_nocancel(int fd, const char *name, int oflag, int mode);
+ */
+MI_ENTRY_POINT(_openat$NOCANCEL)
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldr     x3, [fp, #16]
+#else
+       ldr     w3, [fp, #16]
+#endif
+       MI_CALL_EXTERNAL(___openat_nocancel)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/* 
+ * int shm_open(const char *, int, ...);
+ * int __shm_open(const char*, int oflag, int mode);
+ */
+MI_ENTRY_POINT(_shm_open)
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldr     x2, [fp, #16]
+#else
+       ldr     w2, [fp, #16]
+#endif
+       MI_CALL_EXTERNAL(___shm_open)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/*
+ * int msgsys(int, ...);
+ * int __msgsys(int which, int a2, int a3, int a4, int a5);
+ */
+MI_ENTRY_POINT(_msgsys)
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldp     x1, x2, [fp, #16]
+       ldp     x3, x4, [fp, #32]
+#else
+       ldp     w1, w2, [fp, #16]
+       ldp     w3, w4, [fp, #24]
+#endif
+       MI_CALL_EXTERNAL(___msgsys)
+       POP_FRAME
+
+/*
+ * int semsys(int, ...);
+ * int __semsys(int which, int a2, int a3, int a4, int a5);
+ */
+MI_ENTRY_POINT(_semsys)
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldp     x1, x2, [fp, #16]
+       ldp     x3, x4, [fp, #32]
+#else
+       ldp     w1, w2, [fp, #16]
+       ldp     w3, w4, [fp, #24]
+#endif
+       MI_CALL_EXTERNAL(___semsys)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/* 
+ * int semctl(int, int, int, ...);
+ * int __semctl(int semid, int semnum, int cmd, semun_t arg);
+ */
+ MI_ENTRY_POINT(_semctl)
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldr     x3, [fp, #16]
+#else
+       ldr     w3, [fp, #16]
+#endif
+       MI_CALL_EXTERNAL(___semctl)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+/* 
+ * int shmsys(int, ...);
+ * int __shmsys(int which, int a2, int a3, int a4);
+ */
+ MI_ENTRY_POINT(_shmsys)
+       ARM64_STACK_PROLOG
+       PUSH_FRAME
+#if __LP64__
+       ldp     x1, x2, [fp, #16]
+       ldr     x3, [fp, #32]
+#else
+       ldp     w1, w2, [fp, #16]
+       ldr     w3, [fp, #24]
+#endif
+       MI_CALL_EXTERNAL(___shmsys)
+       POP_FRAME
+       ARM64_STACK_EPILOG
+
+#endif /* defined(__arm64__) */