From 57ae9370d8513ae0f27fee4d2f9fd6cbb77613ea Mon Sep 17 00:00:00 2001
From: simonmar <unknown>
Date: Mon, 23 Aug 1999 09:09:32 +0000
Subject: [PATCH] [project @ 1999-08-23 09:09:32 by simonmar] Sparc support,
from Michael Hobbs <hobbs1@acm.org>.
---
ghc/rts/Adjustor.c | 70 ++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 68 insertions(+), 2 deletions(-)
diff --git a/ghc/rts/Adjustor.c b/ghc/rts/Adjustor.c
index 309980251551..24fa13a293f3 100644
--- a/ghc/rts/Adjustor.c
+++ b/ghc/rts/Adjustor.c
@@ -41,7 +41,7 @@ Haskell side.
#include "RtsFlags.h"
/* Heavily arch-specific, I'm afraid.. */
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_TARGET_ARCH) || defined(sparc_TARGET_ARCH)
/* Now here's something obscure for you:
@@ -67,6 +67,7 @@ static unsigned char __obscure_ccall_ret_code [] =
, 0xc3 /* ret */
};
+
void*
createAdjustor(int cconv, StgStablePtr hptr, StgFunPtr wptr)
{
@@ -76,6 +77,13 @@ createAdjustor(int cconv, StgStablePtr hptr, StgFunPtr wptr)
if (cconv == 0) { /* the adjustor will be _stdcall'ed */
+#if defined(sparc_TARGET_ARCH)
+ /* SPARC doesn't have a calling convention other than _ccall */
+ if (cconv == 0) {
+ return NULL;
+ }
+#endif
+
/* Magic constant computed by inspecting the code length of
the following assembly language snippet
(offset and machine code prefixed):
@@ -111,6 +119,7 @@ createAdjustor(int cconv, StgStablePtr hptr, StgFunPtr wptr)
} else { /* the adjustor will be _ccall'ed */
+#if defined(i386_TARGET_ARCH)
/* Magic constant computed by inspecting the code length of
the following assembly language snippet
(offset and machine code prefixed):
@@ -156,6 +165,53 @@ createAdjustor(int cconv, StgStablePtr hptr, StgFunPtr wptr)
adj_code[0x0f] = (unsigned char)0xff; /* jmp *%eax */
adj_code[0x10] = (unsigned char)0xe0;
+
+#elif defined(sparc_TARGET_ARCH)
+ /* Magic constant computed by inspecting the code length of
+ the following assembly language snippet
+ (offset and machine code prefixed):
+
+ <00>: 13 00 3f fb sethi %hi(0x00ffeffa), %o1 # load up wptr (1 of 2)
+ <04>: 11 37 ab 6f sethi %hi(0xdeadbeef), %o0 # load up hptr (1 of 2)
+ <08>: 81 c2 63 fa jmp %o1+%lo(0x00ffeffa) # jump to wptr (load 2 of 2)
+ <0c>: 90 12 22 ef or %o0, %lo(0xdeadbeef), %o0 # load up hptr (2 of 2)
+ # [in delay slot]
+ <10>: de ad be ef # Place the value of the StgStablePtr somewhere readable
+
+ ccall'ing on a SPARC leaves little to be performed by the caller.
+ The callee shifts the window on entry and restores it on exit.
+ Input paramters and results are passed via registers. (%o0 in the
+ code above contains the input paramter to wptr.) The return address
+ is stored in %o7/%i7. Since we don't shift the window in this code,
+ the return address is preserved and wptr will return to our caller.
+
+ */
+ sizeof_adjustor = 28*sizeof(char);
+
+ if ((adjustor = stgMallocBytes(sizeof_adjustor,"createAdjustor")) == NULL) {
+ return NULL;
+ }
+
+ adj_code = (unsigned char*)adjustor;
+
+ /* sethi %hi(wptr), %o1 */
+ *((unsigned long*)(adj_code+0x00)) = (unsigned long)0x13000000;
+ *((unsigned long*)(adj_code+0x00)) |= ((unsigned long)wptr) >> 10;
+
+ /* sethi %hi(hptr), %o0 */
+ *((unsigned long*)(adj_code+0x04)) = (unsigned long)0x11000000;
+ *((unsigned long*)(adj_code+0x04)) |= ((unsigned long)hptr) >> 10;
+
+ /* jmp %o1+%lo(wptr) */
+ *((unsigned long*)(adj_code+0x08)) = (unsigned long)0x81c26000;
+ *((unsigned long*)(adj_code+0x08)) |= ((unsigned long)wptr) & 0x000003ff;
+
+ /* or %o0, %lo(hptr), %o0 */
+ *((unsigned long*)(adj_code+0x0c)) = (unsigned long)0x90122000;
+ *((unsigned long*)(adj_code+0x0c)) |= ((unsigned long)hptr) & 0x000003ff;
+
+ *((StgStablePtr*)(adj_code+0x10)) = (StgStablePtr)hptr;
+#endif
}
@@ -166,6 +222,7 @@ createAdjustor(int cconv, StgStablePtr hptr, StgFunPtr wptr)
void
freeHaskellFunctionPtr(void* ptr)
{
+#if defined(i386_TARGET_ARCH)
if ( *(unsigned char*)ptr != 0x68 &&
*(unsigned char*)ptr != 0x58 ) {
fprintf(stderr, "freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
@@ -178,10 +235,19 @@ freeHaskellFunctionPtr(void* ptr)
} else {
freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x02)));
}
+#elif defined(sparc_TARGET_ARCH)
+ if ( *(unsigned char*)ptr != 0x13 ) {
+ fprintf(stderr, "freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
+ return;
+ }
+
+ /* Free the stable pointer first..*/
+ freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x10)));
+#endif
*((unsigned char*)ptr) = '\0';
free(ptr);
}
-#endif /* i386_TARGET_ARCH */
+#endif /* i386_TARGET_ARCH || sparc_TARGET_ARCH */
--
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