- || (darwin_macosx_version_min \
- && strverscmp (darwin_macosx_version_min, "10.3") >= 0))
-
-/* Attempt to turn on execute permission for the stack. This may be
- used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
- if the target machine can change execute permissions on a page).
-
- There is no way to query the execute permission of the stack, so
- we always issue the mprotect() call.
-
- Note that we go out of our way to use namespace-non-invasive calls
- here. Unfortunately, there is no libc-internal name for mprotect().
-
- Also note that no errors should be emitted by this code; it is
- considered dangerous for library calls to send messages to
- stdout/stderr. */
-
-#define ENABLE_EXECUTE_STACK \
-extern void __enable_execute_stack (void *); \
-void \
-__enable_execute_stack (void *addr) \
-{ \
- extern int mprotect (void *, size_t, int); \
- extern int __sysctl (int *, unsigned int, void *, size_t *, \
- void *, size_t); \
- \
- static int size; \
- static long mask; \
- \
- char *page, *end; \
- \
- if (size == 0) \
- { \
- int mib[2]; \
- size_t len; \
- \
- mib[0] = 6; /* CTL_HW */ \
- mib[1] = 7; /* HW_PAGESIZE */ \
- len = sizeof (size); \
- (void) __sysctl (mib, 2, &size, &len, NULL, 0); \
- mask = ~((long) size - 1); \
- } \
- \
- page = (char *) (((long) addr) & mask); \
- end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
- \
- /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
- (void) mprotect (page, end - page, 7); \
-}
+ || strverscmp (darwin_macosx_version_min, "10.3") >= 0)
+
+/* When generating kernel code or kexts, we don't use Altivec by
+ default, as kernel code doesn't save/restore those registers. */
+#define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext)
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