#include <windows.h>
#endif
-#if defined(openbsd_TARGET_OS)
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/mman.h>
+#if defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS)
+#include <string.h>
+#endif
-/* no C99 header stdint.h on OpenBSD? */
-typedef unsigned long my_uintptr_t;
+#ifdef LEADING_UNDERSCORE
+#define UNDERSCORE "_"
+#else
+#define UNDERSCORE ""
#endif
+#if defined(i386_HOST_ARCH) && !defined(darwin_HOST_OS)
+/*
+ Now here's something obscure for you:
-#if defined(powerpc_TARGET_ARCH) && defined(linux_TARGET_OS)
-#include <string.h>
+ When generating an adjustor thunk that uses the C calling
+ convention, we have to make sure that the thunk kicks off
+ the process of jumping into Haskell with a tail jump. Why?
+ Because as a result of jumping in into Haskell we may end
+ up freeing the very adjustor thunk we came from using
+ freeHaskellFunctionPtr(). Hence, we better not return to
+ the adjustor code on our way out, since it could by then
+ point to junk.
+
+ The fix is readily at hand, just include the opcodes
+ for the C stack fixup code that we need to perform when
+ returning in some static piece of memory and arrange
+ to return to it before tail jumping from the adjustor thunk.
+*/
+static void GNUC3_ATTRIBUTE(used) obscure_ccall_wrapper(void)
+{
+ __asm__ (
+ ".globl " UNDERSCORE "obscure_ccall_ret_code\n"
+ UNDERSCORE "obscure_ccall_ret_code:\n\t"
+ "addl $0x4, %esp\n\t"
+ "ret"
+ );
+}
+extern void obscure_ccall_ret_code(void);
+
+#if defined(openbsd_HOST_OS)
+static unsigned char *obscure_ccall_ret_code_dyn;
#endif
-/* Heavily arch-specific, I'm afraid.. */
+#endif
-/*
- * Allocate len bytes which are readable, writable, and executable.
- *
- * ToDo: If this turns out to be a performance bottleneck, one could
- * e.g. cache the last VirtualProtect/mprotect-ed region and do
- * nothing in case of a cache hit.
- */
-static void*
-mallocBytesRWX(int len)
+#if defined(x86_64_HOST_ARCH)
+static void GNUC3_ATTRIBUTE(used) obscure_ccall_wrapper(void)
{
- void *addr = stgMallocBytes(len, "mallocBytesRWX");
-#if defined(i386_TARGET_ARCH) && defined(_WIN32)
- /* This could be necessary for processors which distinguish between READ and
- EXECUTE memory accesses, e.g. Itaniums. */
- DWORD dwOldProtect = 0;
- if (VirtualProtect (addr, len, PAGE_EXECUTE_READWRITE, &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)
- /* malloced memory isn't executable by default on OpenBSD */
- my_uintptr_t pageSize = sysconf(_SC_PAGESIZE);
- my_uintptr_t mask = ~(pageSize - 1);
- my_uintptr_t startOfFirstPage = ((my_uintptr_t)addr ) & mask;
- my_uintptr_t startOfLastPage = ((my_uintptr_t)addr + len - 1) & mask;
- my_uintptr_t size = startOfLastPage - startOfFirstPage + pageSize;
- if (mprotect((void*)startOfFirstPage, (size_t)size, PROT_EXEC | PROT_READ | PROT_WRITE) != 0) {
- barf("mallocBytesRWX: failed to protect 0x%p\n", addr);
- }
-#endif
- return addr;
+ __asm__ (
+ ".globl " UNDERSCORE "obscure_ccall_ret_code\n"
+ UNDERSCORE "obscure_ccall_ret_code:\n\t"
+ "addq $0x8, %rsp\n\t"
+ "ret"
+ );
}
-
-#if defined(i386_TARGET_ARCH)
-static unsigned char *obscure_ccall_ret_code;
+extern void obscure_ccall_ret_code(void);
#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 */
*stable = getStablePtr((StgPtr)arr);
/* and return a ptr to the goods inside the array */
- return(BYTE_ARR_CTS(arr));
+ return(&(arr->payload));
}
#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
#endif
+#if defined(i386_HOST_ARCH) && defined(darwin_HOST_OS)
+
+/* !!! !!! WARNING: !!! !!!
+ * This structure is accessed from AdjustorAsm.s
+ * Any changes here have to be mirrored in the offsets there.
+ */
+
+typedef struct AdjustorStub {
+ unsigned char call[8];
+ StgStablePtr hptr;
+ StgFunPtr wptr;
+ StgInt frame_size;
+ StgInt argument_size;
+} AdjustorStub;
+#endif
+
+#if defined(darwin_HOST_OS) || defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+static int totalArgumentSize(char *typeString)
+{
+ int sz = 0;
+ while(*typeString)
+ {
+ char t = *typeString++;
+
+ switch(t)
+ {
+ // on 32-bit platforms, Double and Int64 occupy two words.
+ case 'd':
+ case 'l':
+ if(sizeof(void*) == 4)
+ {
+ sz += 2;
+ break;
+ }
+ // everything else is one word.
+ default:
+ sz += 1;
+ }
+ }
+ return sz;
+}
+#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) && !defined(x86_64_HOST_ARCH)
+ STG_UNUSED
+#endif
+ )
{
void *adjustor = NULL;
switch (cconv)
{
case 0: /* _stdcall */
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_HOST_ARCH) && !defined(darwin_HOST_OS)
/* Magic constant computed by inspecting the code length of
the following assembly language snippet
(offset and machine code prefixed):
<c>: ff e0 jmp %eax # and jump to it.
# the callee cleans up the stack
*/
- adjustor = mallocBytesRWX(14);
+ adjustor = stgMallocBytesRWX(14);
{
unsigned char *const adj_code = (unsigned char *)adjustor;
adj_code[0x00] = (unsigned char)0x58; /* popl %eax */
break;
case 1: /* _ccall */
-#if defined(i386_TARGET_ARCH)
+#if defined(i386_HOST_ARCH) && !defined(darwin_HOST_OS)
/* Magic constant computed by inspecting the code length of
the following assembly language snippet
(offset and machine code prefixed):
That's (thankfully) the case here with the restricted set of
return types that we support.
*/
- adjustor = mallocBytesRWX(17);
+ adjustor = stgMallocBytesRWX(17);
{
unsigned char *const adj_code = (unsigned char *)adjustor;
*((StgFunPtr*)(adj_code + 0x06)) = (StgFunPtr)wptr;
adj_code[0x0a] = (unsigned char)0x68; /* pushl obscure_ccall_ret_code */
- *((StgFunPtr*)(adj_code + 0x0b)) = (StgFunPtr)obscure_ccall_ret_code;
+ *((StgFunPtr*)(adj_code + 0x0b)) =
+#if !defined(openbsd_HOST_OS)
+ (StgFunPtr)obscure_ccall_ret_code;
+#else
+ (StgFunPtr)obscure_ccall_ret_code_dyn;
+#endif
adj_code[0x0f] = (unsigned char)0xff; /* jmp *%eax */
adj_code[0x10] = (unsigned char)0xe0;
}
-#elif defined(sparc_TARGET_ARCH)
+#elif defined(i386_HOST_ARCH) && defined(darwin_HOST_OS)
+ {
+ /*
+ What's special about Darwin/Mac OS X on i386?
+ It wants the stack to stay 16-byte aligned.
+
+ We offload most of the work to AdjustorAsm.S.
+ */
+ AdjustorStub *adjustorStub = stgMallocBytesRWX(sizeof(AdjustorStub));
+ adjustor = adjustorStub;
+
+ extern void adjustorCode(void);
+ int sz = totalArgumentSize(typeString);
+
+ adjustorStub->call[0] = 0xe8;
+ *(long*)&adjustorStub->call[1] = ((char*)&adjustorCode) - ((char*)adjustorStub + 5);
+ adjustorStub->hptr = hptr;
+ adjustorStub->wptr = wptr;
+
+ // The adjustor puts the following things on the stack:
+ // 1.) %ebp link
+ // 2.) padding and (a copy of) the arguments
+ // 3.) a dummy argument
+ // 4.) hptr
+ // 5.) return address (for returning to the adjustor)
+ // All these have to add up to a multiple of 16.
+
+ // first, include everything in frame_size
+ adjustorStub->frame_size = sz * 4 + 16;
+ // align to 16 bytes
+ adjustorStub->frame_size = (adjustorStub->frame_size + 15) & ~15;
+ // only count 2.) and 3.) as part of frame_size
+ adjustorStub->frame_size -= 12;
+ adjustorStub->argument_size = sz;
+ }
+
+#elif defined(x86_64_HOST_ARCH)
+ /*
+ stack at call:
+ argn
+ ...
+ arg7
+ return address
+ %rdi,%rsi,%rdx,%rcx,%r8,%r9 = arg0..arg6
+
+ if there are <6 integer args, then we can just push the
+ StablePtr into %edi and shuffle the other args up.
+
+ If there are >=6 integer args, then we have to flush one arg
+ to the stack, and arrange to adjust the stack ptr on return.
+ The stack will be rearranged to this:
+
+ argn
+ ...
+ arg7
+ return address *** <-- dummy arg in stub fn.
+ arg6
+ obscure_ccall_ret_code
+
+ This unfortunately means that the type of the stub function
+ must have a dummy argument for the original return address
+ pointer inserted just after the 6th integer argument.
+
+ Code for the simple case:
+
+ 0: 4d 89 c1 mov %r8,%r9
+ 3: 49 89 c8 mov %rcx,%r8
+ 6: 48 89 d1 mov %rdx,%rcx
+ 9: 48 89 f2 mov %rsi,%rdx
+ c: 48 89 fe mov %rdi,%rsi
+ f: 48 8b 3d 0a 00 00 00 mov 10(%rip),%rdi
+ 16: ff 25 0c 00 00 00 jmpq *12(%rip)
+ ...
+ 20: .quad 0 # aligned on 8-byte boundary
+ 28: .quad 0 # aligned on 8-byte boundary
+
+
+ And the version for >=6 integer arguments:
+
+ 0: 41 51 push %r9
+ 2: ff 35 20 00 00 00 pushq 32(%rip) # 28 <ccall_adjustor+0x28>
+ 8: 4d 89 c1 mov %r8,%r9
+ b: 49 89 c8 mov %rcx,%r8
+ e: 48 89 d1 mov %rdx,%rcx
+ 11: 48 89 f2 mov %rsi,%rdx
+ 14: 48 89 fe mov %rdi,%rsi
+ 17: 48 8b 3d 12 00 00 00 mov 18(%rip),%rdi # 30 <ccall_adjustor+0x30>
+ 1e: ff 25 14 00 00 00 jmpq *20(%rip) # 38 <ccall_adjustor+0x38>
+ ...
+ 28: .quad 0 # aligned on 8-byte boundary
+ 30: .quad 0 # aligned on 8-byte boundary
+ 38: .quad 0 # aligned on 8-byte boundary
+ */
+
+ /* we assume the small code model (gcc -mcmmodel=small) where
+ * all symbols are <2^32, so hence wptr should fit into 32 bits.
+ */
+ ASSERT(((long)wptr >> 32) == 0);
+
+ {
+ int i = 0;
+ char *c;
+
+ // determine whether we have 6 or more integer arguments,
+ // and therefore need to flush one to the stack.
+ for (c = typeString; *c != '\0'; c++) {
+ if (*c == 'i' || *c == 'l') i++;
+ if (i == 6) break;
+ }
+
+ if (i < 6) {
+ adjustor = stgMallocBytesRWX(0x30);
+
+ *(StgInt32 *)adjustor = 0x49c1894d;
+ *(StgInt32 *)(adjustor+0x4) = 0x8948c889;
+ *(StgInt32 *)(adjustor+0x8) = 0xf28948d1;
+ *(StgInt32 *)(adjustor+0xc) = 0x48fe8948;
+ *(StgInt32 *)(adjustor+0x10) = 0x000a3d8b;
+ *(StgInt32 *)(adjustor+0x14) = 0x25ff0000;
+ *(StgInt32 *)(adjustor+0x18) = 0x0000000c;
+ *(StgInt64 *)(adjustor+0x20) = (StgInt64)hptr;
+ *(StgInt64 *)(adjustor+0x28) = (StgInt64)wptr;
+ }
+ else
+ {
+ adjustor = stgMallocBytesRWX(0x40);
+
+ *(StgInt32 *)adjustor = 0x35ff5141;
+ *(StgInt32 *)(adjustor+0x4) = 0x00000020;
+ *(StgInt32 *)(adjustor+0x8) = 0x49c1894d;
+ *(StgInt32 *)(adjustor+0xc) = 0x8948c889;
+ *(StgInt32 *)(adjustor+0x10) = 0xf28948d1;
+ *(StgInt32 *)(adjustor+0x14) = 0x48fe8948;
+ *(StgInt32 *)(adjustor+0x18) = 0x00123d8b;
+ *(StgInt32 *)(adjustor+0x1c) = 0x25ff0000;
+ *(StgInt32 *)(adjustor+0x20) = 0x00000014;
+
+ *(StgInt64 *)(adjustor+0x28) = (StgInt64)obscure_ccall_ret_code;
+ *(StgInt64 *)(adjustor+0x30) = (StgInt64)hptr;
+ *(StgInt64 *)(adjustor+0x38) = (StgInt64)wptr;
+ }
+ }
+#elif defined(sparc_HOST_ARCH)
/* Magic constant computed by inspecting the code length of the following
assembly language snippet (offset and machine code prefixed):
similarly, and local variables should be accessed via %fp, not %sp. In a
nutshell: This should work! (Famous last words! :-)
*/
- adjustor = mallocBytesRWX(4*(11+1));
+ adjustor = stgMallocBytesRWX(4*(11+1));
{
unsigned long *const adj_code = (unsigned long *)adjustor;
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.
4 bytes (getting rid of the nop), hence saving memory. [ccshan]
*/
ASSERT(((StgWord64)wptr & 3) == 0);
- adjustor = mallocBytesRWX(48);
+ adjustor = stgMallocBytesRWX(48);
{
StgWord64 *const code = (StgWord64 *)adjustor;
/* 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))
*/
// allocate space for at most 4 insns per parameter
// plus 14 more instructions.
- adjustor = mallocBytesRWX(4 * (4*n + 14));
+ adjustor = stgMallocBytesRWX(4 * (4*n + 14));
code = (unsigned*)adjustor;
*code++ = 0x48000008; // b *+8
}
}
-#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 = stgMallocBytesRWX(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++;
-
- 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;
-#endif
- case 'f': sz += 1; break;
- case 'i': sz += 1; break;
- }
- }
- 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;
- }
+ // Calculate the size of the stack frame, in words.
+ sz = totalArgumentSize(typeString);
+
+ // 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) && !defined(darwin_HOST_OS)
if ( *(unsigned char*)ptr != 0x68 &&
*(unsigned char*)ptr != 0x58 ) {
errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x01)));
} else {
freeStablePtr(*((StgStablePtr*)((unsigned char*)ptr + 0x02)));
- }
-#elif defined(sparc_TARGET_ARCH)
+ }
+#elif defined(x86_TARGET_ARCH) && defined(darwin_HOST_OS)
+if ( *(unsigned char*)ptr != 0xe8 ) {
+ errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
+ return;
+ }
+ freeStablePtr(((AdjustorStub*)ptr)->hptr);
+#elif defined(x86_64_HOST_ARCH)
+ if ( *(StgWord16 *)ptr == 0x894d ) {
+ freeStablePtr(*(StgStablePtr*)(ptr+0x20));
+ } else if ( *(StgWord16 *)ptr == 0x5141 ) {
+ freeStablePtr(*(StgStablePtr*)(ptr+0x30));
+ } else {
+ errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
+ return;
+ }
+#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)
- /* Now here's something obscure for you:
-
- When generating an adjustor thunk that uses the C calling
- convention, we have to make sure that the thunk kicks off
- the process of jumping into Haskell with a tail jump. Why?
- Because as a result of jumping in into Haskell we may end
- up freeing the very adjustor thunk we came from using
- freeHaskellFunctionPtr(). Hence, we better not return to
- the adjustor code on our way out, since it could by then
- point to junk.
-
- The fix is readily at hand, just include the opcodes
- for the C stack fixup code that we need to perform when
- returning in some static piece of memory and arrange
- to return to it before tail jumping from the adjustor thunk.
- */
-
- obscure_ccall_ret_code = mallocBytesRWX(4);
-
- obscure_ccall_ret_code[0x00] = (unsigned char)0x83; /* addl $0x4, %esp */
- obscure_ccall_ret_code[0x01] = (unsigned char)0xc4;
- obscure_ccall_ret_code[0x02] = (unsigned char)0x04;
-
- obscure_ccall_ret_code[0x03] = (unsigned char)0xc3; /* ret */
+#if defined(i386_HOST_ARCH) && defined(openbsd_HOST_OS)
+ obscure_ccall_ret_code_dyn = stgMallocBytesRWX(4);
+ obscure_ccall_ret_code_dyn[0] = ((unsigned char *)obscure_ccall_ret_code)[0];
+ obscure_ccall_ret_code_dyn[1] = ((unsigned char *)obscure_ccall_ret_code)[1];
+ obscure_ccall_ret_code_dyn[2] = ((unsigned char *)obscure_ccall_ret_code)[2];
+ obscure_ccall_ret_code_dyn[3] = ((unsigned char *)obscure_ccall_ret_code)[3];
#endif
}
projects / ghc-hetmet.git / blobdiff