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Fix another amd64 issue with lookaside lists: we initialize the

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alloc and free routine pointers in the lookaside list with pointers
to ExAllocatePoolWithTag() and ExFreePool() (in the case where the
driver does not provide its own alloc and free routines). For amd64,
this is wrong: we have to use pointers to the wrapped versions of these
functions, not the originals.
This commit is contained in:
Bill Paul 2005-03-28 19:27:58 +00:00
parent bd1da15f2a
commit 269dfbe780
1 changed files with 40 additions and 6 deletions
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46
sys/compat/ndis/subr_ntoskrnl.c
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@ -178,6 +178,7 @@ __stdcall static ndis_status ObReferenceObjectByHandle(ndis_handle,
__fastcall static void ObfDereferenceObject(REGARGS1(void *object));
__stdcall static uint32_t ZwClose(ndis_handle);
static void *ntoskrnl_memset(void *, int, size_t);
static funcptr ntoskrnl_findwrap(funcptr);
static uint32_t DbgPrint(char *, ...);
__stdcall static void DbgBreakPoint(void);
__stdcall static void dummy(void);
@ -1502,6 +1503,33 @@ ntoskrnl_popsl(head)
return(first);
}
/*
* We need this to make lookaside lists work for amd64.
* We pass a pointer to ExAllocatePoolWithTag() the lookaside
* list structure. For amd64 to work right, this has to be a
* pointer to the wrapped version of the routine, not the
* original. Letting the Windows driver invoke the original
* function directly will result in a convention calling
* mismatch and a pretty crash. On x86, this effectively
* becomes a no-op since ipt_func and ipt_wrap are the same.
*/
static funcptr
ntoskrnl_findwrap(func)
funcptr func;
{
image_patch_table *patch;
patch = ntoskrnl_functbl;
while (patch->ipt_func != NULL) {
if ((funcptr)patch->ipt_func == func)
return((funcptr)patch->ipt_wrap);
patch++;
}
return(NULL);
}
__stdcall static void
ExInitializePagedLookasideList(lookaside, allocfunc, freefunc,
flags, size, tag, depth)
@ -1521,12 +1549,14 @@ ExInitializePagedLookasideList(lookaside, allocfunc, freefunc,
lookaside->nll_l.gl_size = size;
lookaside->nll_l.gl_tag = tag;
if (allocfunc == NULL)
lookaside->nll_l.gl_allocfunc = ExAllocatePoolWithTag;
lookaside->nll_l.gl_allocfunc =
ntoskrnl_findwrap((funcptr)ExAllocatePoolWithTag);
else
lookaside->nll_l.gl_allocfunc = allocfunc;
if (freefunc == NULL)
lookaside->nll_l.gl_freefunc = ExFreePool;
lookaside->nll_l.gl_freefunc =
ntoskrnl_findwrap((funcptr)ExFreePool);
else
lookaside->nll_l.gl_freefunc = freefunc;
@ -1534,7 +1564,8 @@ ExInitializePagedLookasideList(lookaside, allocfunc, freefunc,
KeInitializeSpinLock(&lookaside->nll_obsoletelock);
#endif
lookaside->nll_l.gl_depth = LOOKASIDE_DEPTH;
lookaside->nll_l.gl_type = NonPagedPool;
lookaside->nll_l.gl_depth = depth;
lookaside->nll_l.gl_maxdepth = LOOKASIDE_DEPTH;
return;
@ -1573,12 +1604,14 @@ ExInitializeNPagedLookasideList(lookaside, allocfunc, freefunc,
lookaside->nll_l.gl_size = size;
lookaside->nll_l.gl_tag = tag;
if (allocfunc == NULL)
lookaside->nll_l.gl_allocfunc = ExAllocatePoolWithTag;
lookaside->nll_l.gl_allocfunc =
ntoskrnl_findwrap((funcptr)ExAllocatePoolWithTag);
else
lookaside->nll_l.gl_allocfunc = allocfunc;
if (freefunc == NULL)
lookaside->nll_l.gl_freefunc = ExFreePool;
lookaside->nll_l.gl_freefunc =
ntoskrnl_findwrap((funcptr)ExFreePool);
else
lookaside->nll_l.gl_freefunc = freefunc;
@ -1586,7 +1619,8 @@ ExInitializeNPagedLookasideList(lookaside, allocfunc, freefunc,
KeInitializeSpinLock(&lookaside->nll_obsoletelock);
#endif
lookaside->nll_l.gl_depth = LOOKASIDE_DEPTH;
lookaside->nll_l.gl_type = NonPagedPool;
lookaside->nll_l.gl_depth = depth;
lookaside->nll_l.gl_maxdepth = LOOKASIDE_DEPTH;
return;