1/* 2 * Copyright 2018, J��r��me Duval, jerome.duval@gmail.com. 3 * Copyright 2012, Alex Smith, alex@alex-smith.me.uk. 4 * Distributed under the terms of the MIT License. 5 */ 6 7 8#include "x86_signals.h" 9 10#include <string.h> 11 12#include <KernelExport.h> 13 14#include <commpage_compat.h> 15#include <cpu.h> 16#include <elf.h> 17#include <smp.h> 18 19 20extern "C" void x86_64_signal_handler_compat(void); 21extern int x86_64_signal_handler_compat_end; 22 23 24void 25x86_compat_initialize_commpage_signal_handler() 26{ 27 void* handlerCode = (void*)&x86_64_signal_handler_compat; 28 void* handlerCodeEnd = &x86_64_signal_handler_compat_end; 29 30 // Copy the signal handler code to the commpage. 31 size_t len = (size_t)((addr_t)handlerCodeEnd - (addr_t)handlerCode); 32 addr_t position = fill_commpage_compat_entry( 33 COMMPAGE_ENTRY_X86_SIGNAL_HANDLER, handlerCode, len); 34 35 // Add symbol to the commpage image. 36 image_id image = get_commpage_compat_image(); 37 elf_add_memory_image_symbol(image, "commpage_compat_signal_handler", 38 position, len, B_SYMBOL_TYPE_TEXT); 39} 40 41