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win32 seh changes

erg 2006-08-03 18:27:34 +00:00
parent b308d389d8
commit 48daad545e
1 changed files with 273 additions and 234 deletions
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41
vm/os-windows.c
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@ -218,8 +218,47 @@ void seh_call(void (*func)(), exception_handler_t *handler)
asm("mov %0, %%fs:0" : "=r" (record.next_handler)); asm("mov %0, %%fs:0" : "=r" (record.next_handler));
} }
static long exception_handler(void *rec, void *frame, void *ctx, void *dispatch) static long getpagesize (void) {
static long g_pagesize = 0;
if (! g_pagesize) {
SYSTEM_INFO system_info;
GetSystemInfo (&system_info);
g_pagesize = system_info.dwPageSize;
}
return g_pagesize;
}
/* this function tests if a given faulting location is in a poison page. The
page address is taken from area + round_up_to_page_size(area_size) +
pagesize*offset */
static bool in_page(void *fault, void *i_area, CELL area_size, int offset)
{ {
const int pagesize = getpagesize();
intptr_t area = (intptr_t) i_area;
area += pagesize * ((area_size + (pagesize - 1)) / pagesize);
area += offset * pagesize;
const int page = area / pagesize;
const int fault_page = (intptr_t)fault / pagesize;
return page == fault_page;
}
//static long exception_handler(void *rec, void *frame, void *ctx, void *dispatch)
static long exception_handler(PEXCEPTION_RECORD rec, void *frame, void *ctx, void *dispatch)
{
if(in_page((void*)rec->ExceptionInformation[1], (void *) ds_bot, 0, -1))
general_error(ERROR_DS_UNDERFLOW,F,F,false);
else if(in_page((void*)rec->ExceptionInformation[1], (void *) ds_bot, ds_size, 0))
general_error(ERROR_DS_OVERFLOW,F,F,false);
else if(in_page((void*)rec->ExceptionInformation[1], (void *) rs_bot, 0, -1))
general_error(ERROR_RS_UNDERFLOW,F,F,false);
else if(in_page((void*)rec->ExceptionInformation[1], (void *) rs_bot, rs_size, 0))
general_error(ERROR_RS_OVERFLOW,F,F,false);
else if(in_page((void*)rec->ExceptionInformation[1], (void *) cs_bot, 0, -1))
general_error(ERROR_CS_UNDERFLOW,F,F,false);
else if(in_page((void*)rec->ExceptionInformation[1], (void *) cs_bot, cs_size, 0))
general_error(ERROR_CS_OVERFLOW,F,F,false);
else
signal_error(SIGSEGV); signal_error(SIGSEGV);
} }