#include "RtsFlags.h"
/* Heavily arch-specific, I'm afraid.. */
-#if defined(i386_TARGET_ARCH) || defined(sparc_TARGET_ARCH) || defined(alpha_TARGET_ARCH)
+#if defined(i386_TARGET_ARCH) || defined(sparc_TARGET_ARCH) || defined(alpha_TARGET_ARCH) || defined(powerpc_TARGET_ARCH)
#if defined(i386_TARGET_ARCH)
/* Now here's something obscure for you:
place %i4 and %i5 at [%sp+92] and [%sp+96] respectively. This
machinery should then work in all cases. (Or would it? Perhaps
it would trash parts of the caller's frame. Dunno).
+
+ SUP, 25 Apr 02: We are quite lucky to push a multiple of 8 bytes in
+ front of the existing arguments, because %sp must stay double-word
+ aligned at all times, see: http://www.sparc.org/standards/psABI3rd.pdf
+ Although we extend the *caller's* stack frame, this shouldn't cause
+ any problems for a C-like caller: alloca is implemented similarly, and
+ local variables should be accessed via %fp, not %sp. In a nutshell:
+ This should work. (Famous last words! :-)
*/
if ((adjustor = stgMallocBytes(4*(8+1), "createAdjustor")) != NULL) {
unsigned long *const adj_code = (unsigned long *)adjustor;
adj_code[7] |= ((unsigned long)hptr) & 0x000003ff;
adj_code[8] = (StgStablePtr)hptr;
+
+ /* flush cache */
+ asm("flush %0" : : "r" (adj_code ));
+ asm("flush %0" : : "r" (adj_code + 2));
+ asm("flush %0" : : "r" (adj_code + 4));
+ asm("flush %0" : : "r" (adj_code + 6));
+
+ /* max. 5 instructions latency, and we need at >= 1 for returning */
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
}
#elif defined(alpha_TARGET_ARCH)
/* Magic constant computed by inspecting the code length of
/* Ensure that instruction cache is consistent with our new code */
__asm__ volatile("call_pal %0" : : "i" (PAL_imb));
}
+#elif defined(powerpc_TARGET_ARCH)
+/*
+ For PowerPC, the following code is used:
+
+ mr r10,r8
+ mr r9,r7
+ mr r8,r6
+ mr r7,r5
+ mr r6,r4
+ mr r5,r3
+ lis r0,0xDEAD ;hi(wptr)
+ lis r3,0xDEAF ;hi(hptr)
+ ori r0,r0,0xBEEF ; lo(wptr)
+ ori r3,r3,0xFACE ; lo(hptr)
+ mtctr r0
+ bctr
+
+ The arguments (passed in registers r3 - r10) are shuffled along by two to
+ make room for hptr and a dummy argument. As r9 and r10 are overwritten by
+ this code, it only works for up to 6 arguments (when floating point arguments
+ are involved, this may be more or less, depending on the exact situation).
+*/
+ if ((adjustor = stgMallocBytes(4*13, "createAdjustor")) != NULL) {
+ unsigned long *const adj_code = (unsigned long *)adjustor;
+
+ // make room for extra arguments
+ adj_code[0] = 0x7d0a4378; //mr r10,r8
+ adj_code[1] = 0x7ce93b78; //mr r9,r7
+ adj_code[2] = 0x7cc83378; //mr r8,r6
+ adj_code[3] = 0x7ca72b78; //mr r7,r5
+ adj_code[4] = 0x7c862378; //mr r6,r4
+ adj_code[5] = 0x7c651b78; //mr r5,r3
+
+ adj_code[6] = 0x3c000000; //lis r0,hi(wptr)
+ adj_code[6] |= ((unsigned long)wptr) >> 16;
+
+ adj_code[7] = 0x3c600000; //lis r3,hi(hptr)
+ adj_code[6] |= ((unsigned long)hptr) >> 16;
+
+ adj_code[8] = 0x60000000; //ori r0,r0,lo(wptr)
+ adj_code[8] |= ((unsigned long)wptr) & 0xFFFF;
+
+ adj_code[9] = 0x60630000; //ori r3,r3,lo(hptr)
+ adj_code[9] |= ((unsigned long)hptr) & 0xFFFF;
+
+ adj_code[10] = 0x7c0903a6; //mtctr r0
+ adj_code[11] = 0x4e800420; //bctr
+ adj_code[12] = (unsigned long)hptr;
+
+ // Flush the Instruction cache:
+ // MakeDataExecutable(adjustor,4*13);
+ /* This would require us to link with CoreServices.framework */
+ { /* this should do the same: */
+ int n = 13;
+ unsigned long *p = adj_code;
+ while(n--)
+ {
+ __asm__ volatile ("dcbf 0,%0\n\tsync\n\ticbi 0,%0"
+ : : "g" (p));
+ p++;
+ }
+ __asm__ volatile ("sync\n\tisync");
+ }
+ }
#else
#error Adjustor creation is not supported on this platform.
#endif
freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x02)));
}
#elif defined(sparc_TARGET_ARCH)
- if ( *(unsigned char*)ptr != 0x13 ) {
+ if ( *(unsigned long*)ptr != 0x9A10000B ) {
fprintf(stderr, "freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
return;
}
/* Free the stable pointer first..*/
- freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x10)));
-#elif defined(sparc_TARGET_ARCH)
+ freeStablePtr(*((StgStablePtr*)((unsigned long*)ptr + 8)));
+#elif defined(alpha_TARGET_ARCH)
if ( *(StgWord64*)ptr != 0xa77b0018a61b0010L ) {
fprintf(stderr, "freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
return;
/* Free the stable pointer first..*/
freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x10)));
+#elif defined(powerpc_TARGET_ARCH)
+ if ( *(StgWord*)ptr != 0x7d0a4378 ) {
+ fprintf(stderr, "freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
+ return;
+ }
+ freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 4*12)));
#else
ASSERT(0);
#endif
projects / ghc-hetmet.git / blobdiff