#include <windows.h>
#endif
-#if defined(openbsd_TARGET_OS)
+#if defined(openbsd_HOST_OS)
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
typedef unsigned long my_uintptr_t;
#endif
-#if defined(powerpc_TARGET_ARCH) && defined(linux_TARGET_OS)
+#if defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS)
#include <string.h>
#endif
mallocBytesRWX(int len)
{
void *addr = stgMallocBytes(len, "mallocBytesRWX");
-#if defined(i386_TARGET_ARCH) && defined(_WIN32)
+#if defined(i386_HOST_ARCH) && defined(_WIN32)
/* This could be necessary for processors which distinguish between READ and
EXECUTE memory accesses, e.g. Itaniums. */
DWORD dwOldProtect = 0;
barf("mallocBytesRWX: failed to protect 0x%p; error=%lu; old protection: %lu\n",
addr, (unsigned long)GetLastError(), (unsigned long)dwOldProtect);
}
-#elif defined(openbsd_TARGET_OS)
+#elif defined(openbsd_HOST_OS)
/* malloced memory isn't executable by default on OpenBSD */
my_uintptr_t pageSize = sysconf(_SC_PAGESIZE);
my_uintptr_t mask = ~(pageSize - 1);
return addr;
}
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_HOST_ARCH)
static unsigned char *obscure_ccall_ret_code;
#endif
-#if defined(alpha_TARGET_ARCH)
+#if defined(alpha_HOST_ARCH)
/* To get the definition of PAL_imb: */
-# if defined(linux_TARGET_OS)
+# if defined(linux_HOST_OS)
# include <asm/pal.h>
# else
# include <machine/pal.h>
# endif
#endif
-#if defined(ia64_TARGET_ARCH)
+#if defined(ia64_HOST_ARCH)
#include "Storage.h"
/* Layout of a function descriptor */
}
#endif
-#if defined(powerpc_TARGET_ARCH) && defined(linux_TARGET_OS)
+#if defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS)
__asm__("obscure_ccall_ret_code:\n\t"
"lwz 1,0(1)\n\t"
"lwz 0,4(1)\n\t"
extern void obscure_ccall_ret_code(void);
#endif
-#if defined(powerpc_TARGET_ARCH) || defined(powerpc64_TARGET_ARCH)
-#if !(defined(powerpc_TARGET_ARCH) && defined(linux_TARGET_OS))
+#if defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+#if !(defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS))
/* !!! !!! WARNING: !!! !!!
* This structure is accessed from AdjustorAsm.s
*/
typedef struct AdjustorStub {
-#if defined(powerpc_TARGET_ARCH) && defined(darwin_TARGET_OS)
+#if defined(powerpc_HOST_ARCH) && defined(darwin_HOST_OS)
unsigned lis;
unsigned ori;
unsigned lwz;
unsigned mtctr;
unsigned bctr;
StgFunPtr code;
-#elif defined(powerpc64_TARGET_ARCH) && defined(darwin_TARGET_OS)
+#elif defined(powerpc64_HOST_ARCH) && defined(darwin_HOST_OS)
/* powerpc64-darwin: just guessing that it won't use fundescs. */
unsigned lis;
unsigned ori;
#endif
void*
-createAdjustor(int cconv, StgStablePtr hptr, StgFunPtr wptr, char *typeString)
+createAdjustor(int cconv, StgStablePtr hptr,
+ StgFunPtr wptr,
+ char *typeString
+#if !defined(powerpc_HOST_ARCH) && !defined(powerpc64_HOST_ARCH)
+ STG_UNUSED
+#endif
+ )
{
void *adjustor = NULL;
switch (cconv)
{
case 0: /* _stdcall */
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_HOST_ARCH)
/* Magic constant computed by inspecting the code length of
the following assembly language snippet
(offset and machine code prefixed):
break;
case 1: /* _ccall */
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_HOST_ARCH)
/* Magic constant computed by inspecting the code length of
the following assembly language snippet
(offset and machine code prefixed):
adj_code[0x0f] = (unsigned char)0xff; /* jmp *%eax */
adj_code[0x10] = (unsigned char)0xe0;
}
-#elif defined(sparc_TARGET_ARCH)
+#elif defined(sparc_HOST_ARCH)
/* Magic constant computed by inspecting the code length of the following
assembly language snippet (offset and machine code prefixed):
asm("nop");
asm("nop");
}
-#elif defined(alpha_TARGET_ARCH)
+#elif defined(alpha_HOST_ARCH)
/* Magic constant computed by inspecting the code length of
the following assembly language snippet
(offset and machine code prefixed; note that the machine code
divided by 4, taking the lowest 14 bits.
We only support passing 4 or fewer argument words, for the same
- reason described under sparc_TARGET_ARCH above by JRS, 21 Aug 01.
+ reason described under sparc_HOST_ARCH above by JRS, 21 Aug 01.
On the Alpha the first 6 integer arguments are in a0 through a5,
and the rest on the stack. Hence we want to shuffle the original
caller's arguments by two.
/* Ensure that instruction cache is consistent with our new code */
__asm__ volatile("call_pal %0" : : "i" (PAL_imb));
}
-#elif defined(powerpc_TARGET_ARCH) && defined(linux_TARGET_OS)
+#elif defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS)
#define OP_LO(op,lo) ((((unsigned)(op)) << 16) | (((unsigned)(lo)) & 0xFFFF))
#define OP_HI(op,hi) ((((unsigned)(op)) << 16) | (((unsigned)(hi)) >> 16))
}
}
-#elif defined(powerpc_TARGET_ARCH) || defined(powerpc64_TARGET_ARCH)
+#elif defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
#define OP_LO(op,lo) ((((unsigned)(op)) << 16) | (((unsigned)(lo)) & 0xFFFF))
#define OP_HI(op,hi) ((((unsigned)(op)) << 16) | (((unsigned)(hi)) >> 16))
- {
- AdjustorStub *adjustorStub;
- int sz = 0, extra_sz, total_sz;
-
- // from AdjustorAsm.s
- // not declared as a function so that AIX-style
- // fundescs can never get in the way.
- extern void *adjustorCode;
-
+ {
+ /* The following code applies to all PowerPC and PowerPC64 platforms
+ whose stack layout is based on the AIX ABI.
+
+ Besides (obviously) AIX, this includes
+ Mac OS 9 and BeOS/PPC (may they rest in peace),
+ which use the 32-bit AIX ABI
+ powerpc64-linux,
+ which uses the 64-bit AIX ABI
+ and Darwin (Mac OS X),
+ which uses the same stack layout as AIX,
+ but no function descriptors.
+
+ The actual stack-frame shuffling is implemented out-of-line
+ in the function adjustorCode, in AdjustorAsm.S.
+ Here, we set up an AdjustorStub structure, which
+ is a function descriptor (on platforms that have function
+ descriptors) or a short piece of stub code (on Darwin) to call
+ adjustorCode with a pointer to the AdjustorStub struct loaded
+ into register r2.
+
+ One nice thing about this is that there is _no_ code generated at
+ runtime on the platforms that have function descriptors.
+ */
+ AdjustorStub *adjustorStub;
+ int sz = 0, extra_sz, total_sz;
+
+ // from AdjustorAsm.s
+ // not declared as a function so that AIX-style
+ // fundescs can never get in the way.
+ extern void *adjustorCode;
+
#ifdef FUNDESCS
- adjustorStub = stgMallocBytes(sizeof(AdjustorStub), "createAdjustor");
+ adjustorStub = stgMallocBytes(sizeof(AdjustorStub), "createAdjustor");
#else
- adjustorStub = mallocBytesRWX(sizeof(AdjustorStub));
+ adjustorStub = mallocBytesRWX(sizeof(AdjustorStub));
#endif
- adjustor = adjustorStub;
-
- adjustorStub->code = (void*) &adjustorCode;
+ adjustor = adjustorStub;
+
+ adjustorStub->code = (void*) &adjustorCode;
#ifdef FUNDESCS
- // function descriptors are a cool idea.
- // We don't need to generate any code at runtime.
- adjustorStub->toc = adjustorStub;
+ // function descriptors are a cool idea.
+ // We don't need to generate any code at runtime.
+ adjustorStub->toc = adjustorStub;
#else
- // no function descriptors :-(
- // We need to do things "by hand".
-#if defined(powerpc_TARGET_ARCH)
- // lis r2, hi(adjustorStub)
- adjustorStub->lis = OP_HI(0x3c40, adjustorStub);
- // ori r2, r2, lo(adjustorStub)
- adjustorStub->ori = OP_LO(0x6042, adjustorStub);
- // lwz r0, code(r2)
- adjustorStub->lwz = OP_LO(0x8002, (char*)(&adjustorStub->code)
- - (char*)adjustorStub);
- // mtctr r0
- adjustorStub->mtctr = 0x7c0903a6;
- // bctr
- adjustorStub->bctr = 0x4e800420;
+ // no function descriptors :-(
+ // We need to do things "by hand".
+#if defined(powerpc_HOST_ARCH)
+ // lis r2, hi(adjustorStub)
+ adjustorStub->lis = OP_HI(0x3c40, adjustorStub);
+ // ori r2, r2, lo(adjustorStub)
+ adjustorStub->ori = OP_LO(0x6042, adjustorStub);
+ // lwz r0, code(r2)
+ adjustorStub->lwz = OP_LO(0x8002, (char*)(&adjustorStub->code)
+ - (char*)adjustorStub);
+ // mtctr r0
+ adjustorStub->mtctr = 0x7c0903a6;
+ // bctr
+ adjustorStub->bctr = 0x4e800420;
#else
- barf("adjustor creation not supported on this platform");
+ barf("adjustor creation not supported on this platform");
#endif
- // Flush the Instruction cache:
+ // Flush the Instruction cache:
+ {
+ int n = sizeof(AdjustorStub)/sizeof(unsigned);
+ unsigned *p = (unsigned*)adjustor;
+ while(n--)
{
- int n = sizeof(AdjustorStub)/sizeof(unsigned);
- unsigned *p = (unsigned*)adjustor;
- while(n--)
- {
- __asm__ volatile ("dcbf 0,%0\n\tsync\n\ticbi 0,%0"
- : : "r" (p));
- p++;
- }
- __asm__ volatile ("sync\n\tisync");
+ __asm__ volatile ("dcbf 0,%0\n\tsync\n\ticbi 0,%0"
+ : : "r" (p));
+ p++;
}
+ __asm__ volatile ("sync\n\tisync");
+ }
#endif
- printf("createAdjustor: %s\n", typeString);
- while(*typeString)
- {
- char t = *typeString++;
+ // Calculate the size of the stack frame, in words.
+ while(*typeString)
+ {
+ char t = *typeString++;
- switch(t)
- {
-#if defined(powerpc64_TARGET_ARCH)
- case 'd': sz += 1; break;
- case 'l': sz += 1; break;
-#else
- case 'd': sz += 2; break;
- case 'l': sz += 2; break;
+ switch(t)
+ {
+#if defined(powerpc_HOST_ARCH)
+ // on 32-bit platforms, Double and Int64 occupy two words.
+ case 'd':
+ case 'l':
+ sz += 2;
+ break;
#endif
- case 'f': sz += 1; break;
- case 'i': sz += 1; break;
- }
+ // everything else is one word.
+ default:
+ sz += 1;
}
- extra_sz = sz - 8;
- if(extra_sz < 0)
- extra_sz = 0;
- total_sz = (6 /* linkage area */
- + 8 /* minimum parameter area */
- + 2 /* two extra arguments */
- + extra_sz)*sizeof(StgWord);
-
- // align to 16 bytes.
- // AIX only requires 8 bytes, but who cares?
- total_sz = (total_sz+15) & ~0xF;
-
- adjustorStub->hptr = hptr;
- adjustorStub->wptr = wptr;
- adjustorStub->negative_framesize = -total_sz;
- adjustorStub->extrawords_plus_one = extra_sz + 1;
}
+ // The first eight words of the parameter area
+ // are just "backing store" for the parameters passed in
+ // the GPRs. extra_sz is the number of words beyond those first
+ // 8 words.
+ extra_sz = sz - 8;
+ if(extra_sz < 0)
+ extra_sz = 0;
+
+ // Calculate the total size of the stack frame.
+ total_sz = (6 /* linkage area */
+ + 8 /* minimum parameter area */
+ + 2 /* two extra arguments */
+ + extra_sz)*sizeof(StgWord);
+
+ // align to 16 bytes.
+ // AIX only requires 8 bytes, but who cares?
+ total_sz = (total_sz+15) & ~0xF;
+
+ // Fill in the information that adjustorCode in AdjustorAsm.S
+ // will use to create a new stack frame with the additional args.
+ adjustorStub->hptr = hptr;
+ adjustorStub->wptr = wptr;
+ adjustorStub->negative_framesize = -total_sz;
+ adjustorStub->extrawords_plus_one = extra_sz + 1;
+ }
-#elif defined(ia64_TARGET_ARCH)
+#elif defined(ia64_HOST_ARCH)
/*
Up to 8 inputs are passed in registers. We flush the last two inputs to
the stack, initially into the 16-byte scratch region left by the caller.
void
freeHaskellFunctionPtr(void* ptr)
{
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_HOST_ARCH)
if ( *(unsigned char*)ptr != 0x68 &&
*(unsigned char*)ptr != 0x58 ) {
errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
} else {
freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x02)));
}
-#elif defined(sparc_TARGET_ARCH)
+#elif defined(sparc_HOST_ARCH)
if ( *(unsigned long*)ptr != 0x9C23A008UL ) {
errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
return;
/* Free the stable pointer first..*/
freeStablePtr(*((StgStablePtr*)((unsigned long*)ptr + 11)));
-#elif defined(alpha_TARGET_ARCH)
+#elif defined(alpha_HOST_ARCH)
if ( *(StgWord64*)ptr != 0xa77b0018a61b0010L ) {
errorBelch("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) && defined(linux_TARGET_OS)
+#elif defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS)
if ( *(StgWord*)ptr != 0x48000008 ) {
errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
return;
}
freeStablePtr(((StgStablePtr*)ptr)[1]);
-#elif defined(powerpc_TARGET_ARCH) || defined(powerpc64_TARGET_ARCH)
+#elif defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
extern void* adjustorCode;
if ( ((AdjustorStub*)ptr)->code != (StgFunPtr) &adjustorCode ) {
errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
return;
}
freeStablePtr(((AdjustorStub*)ptr)->hptr);
-#elif defined(ia64_TARGET_ARCH)
+#elif defined(ia64_HOST_ARCH)
IA64FunDesc *fdesc = (IA64FunDesc *)ptr;
StgWord64 *code = (StgWord64 *)(fdesc+1);
void
initAdjustor(void)
{
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_HOST_ARCH)
/* Now here's something obscure for you:
When generating an adjustor thunk that uses the C calling