Just assume address is valid if it lies within one of the known
spaces. (Unlike sunos-os which keeps track of every valid page.) */
- return ( in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE)
- || in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_0_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_1_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, CONTROL_STACK_START , CONTROL_STACK_SIZE )
- || in_range_p(addr, BINDING_STACK_START , BINDING_STACK_SIZE ));
+
+ /* FIXME: this looks like a valid definition for all targets with
+ cheney-gc; it may not be impressively smart (witness the
+ comment above) but maybe associating these functions with the
+ GC rather than the OS would be a maintainability win. -- CSR,
+ 2003-04-04 */
+ struct thread *th;
+ if(in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) ||
+ in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE) ||
+ in_range_p(addr, DYNAMIC_0_SPACE_START, DYNAMIC_SPACE_SIZE) ||
+ in_range_p(addr, DYNAMIC_1_SPACE_START, DYNAMIC_SPACE_SIZE))
+ return 1;
+ for_each_thread(th) {
+ if((th->control_stack_start <= addr) && (addr < th->control_stack_end))
+ return 1;
+ if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE))
+ return 1;
+ }
+ return 0;
}
-
\f
-#if defined GENCGC
-
-#error "GENCGC is not yet supported (presumably on x86 solaris?)"
-
-#else
static void
sigsegv_handler(int signal, siginfo_t *info, void* void_context)
os_vm_address_t addr;
addr = arch_get_bad_addr(signal, info, context);
- /* There's some complicated recovery code in linux-os.c here
- that I'm currently too confused to understand. FIXME. */
if(!interrupt_maybe_gc(signal, info, context)) {
- interrupt_handle_now(signal, info, context);
+ if(!handle_control_stack_guard_triggered(context,addr))
+ interrupt_handle_now(signal, info, context);
}
}
-#endif
-
void
os_install_interrupt_handlers()
{
- undoably_install_low_level_interrupt_handler(SIGSEGV,sigsegv_handler);
+ undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
+ sigsegv_handler);
}