#define DEFAULT_ABI ABI_DARWIN
+#ifdef IN_LIBGCC2
+#undef TARGET_64BIT
+#ifdef __powerpc64__
+#define TARGET_64BIT 1
+#else
+#define TARGET_64BIT 0
+#endif
+#endif
+
/* The object file format is Mach-O. */
#define TARGET_OBJECT_FORMAT OBJECT_MACHO
+/* Size of the Obj-C jump buffer. */
+#define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1))
+
/* We're not ever going to do TOCs. */
#define TARGET_TOC 0
/* Translate config/rs6000/darwin.opt to config/darwin.h. */
#define TARGET_DYNAMIC_NO_PIC (TARGET_MACHO_DYNAMIC_NO_PIC)
-/* Handle #pragma weak and #pragma pack. */
-#define HANDLE_SYSV_PRAGMA 1
-
-
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
while (0)
-/* The Darwin ABI always includes AltiVec, can't be (validly) turned
- off. */
-
#define SUBTARGET_OVERRIDE_OPTIONS \
do { \
+ /* The Darwin ABI always includes AltiVec, can't be (validly) turned \
+ off. */ \
rs6000_altivec_abi = 1; \
TARGET_ALTIVEC_VRSAVE = 1; \
if (DEFAULT_ABI == ABI_DARWIN) \
} \
} while(0)
+#define C_COMMON_OVERRIDE_OPTIONS do { \
+ /* On powerpc, __cxa_get_exception_ptr is available starting in the \
+ 10.4.6 libstdc++.dylib. */ \
+ if ((! darwin_macosx_version_min \
+ || strverscmp (darwin_macosx_version_min, "10.4.6") < 0) \
+ && flag_use_cxa_get_exception_ptr == 2) \
+ flag_use_cxa_get_exception_ptr = 0; \
+} while (0)
+
/* Darwin has 128-bit long double support in libc in 10.4 and later.
Default to 128-bit long doubles even on earlier platforms for ABI
consistency; arithmetic will work even if libc and libm support is
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
/* This is supported in cctools 465 and later. The macro test
above prevents using it in earlier build environments. */
-#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
- if ((LOG) != 0) \
- { \
- if ((MAX_SKIP) == 0) \
- fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
- else \
- fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
- }
+#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
+ if ((LOG) != 0) \
+ { \
+ if ((MAX_SKIP) == 0) \
+ fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
+ else \
+ fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
+ }
#endif
#define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
/* Since Darwin doesn't do TOCs, stub this out. */
-#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) 0
+#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0)
/* Unlike most other PowerPC targets, chars are signed, for
consistency with other Darwin architectures. */
#undef DEFAULT_SIGNED_CHAR
#define DEFAULT_SIGNED_CHAR (1)
-/* Given an rtx X being reloaded into a reg required to be
- in class CLASS, return the class of reg to actually use.
+/* Given an rtx X being reloaded into a reg required to be
+ in class CLASS, return the class of reg to actually use.
In general this is just CLASS; but on some machines
in some cases it is preferable to use a more restrictive class.
-
+
On the RS/6000, we have to return NO_REGS when we want to reload a
floating-point CONST_DOUBLE to force it to be copied to memory.
(TARGET_64BIT \
|| (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); \
+}
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