15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright (c) 2012 The Chromium Authors. All rights reserved. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Use of this source code is governed by a BSD-style license that can be 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * found in the LICENSE file. 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 79ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "ppapi/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string.h> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "native_client/src/untrusted/irt/irt.h" 11c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch#include "ppapi/nacl_irt/public/irt_ppapi.h" 129ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "ppapi/native_client/src/shared/ppapi_proxy/ppruntime.h" 13a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "ppapi/native_client/src/untrusted/pnacl_irt_shim/irt_shim_ppapi.h" 14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "ppapi/native_client/src/untrusted/pnacl_irt_shim/pnacl_shim.h" 1558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Use local strcmp to avoid dependency on libc. */ 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int mystrcmp(const char* s1, const char *s2) { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while((*s1 && *s2) && (*s1++ == *s2++)); 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return *(--s1) - *(--s2); 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 22a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)TYPE_nacl_irt_query __pnacl_real_irt_query_func = NULL; 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 24a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)size_t __pnacl_wrap_irt_query_func(const char *interface_ident, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void *table, size_t tablesize) { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Note there is a benign race in initializing the wrapper. 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * We build the "hook" structure by copying from the IRT's hook and then 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * writing our wrapper for the ppapi method. Two threads may end up 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * attempting to do this simultaneously, which should not be a problem, 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * as they are writing the same values. 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (0 != mystrcmp(interface_ident, NACL_IRT_PPAPIHOOK_v0_1)) { 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * The interface is not wrapped, so use the real interface. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 37a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return (*__pnacl_real_irt_query_func)(interface_ident, table, tablesize); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifndef PNACL_SHIM_AOT 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) /* 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * For PNaCl in-the-browser, redirect to using 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * NACL_IRT_PPAPIHOOK_PNACL_PRIVATE_v0_1 instead of NACL_IRT_PPAPIHOOK_v0_1. 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) */ 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return (*__pnacl_real_irt_query_func)(NACL_IRT_PPAPIHOOK_PNACL_PRIVATE_v0_1, 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) table, tablesize); 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#else 47a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) /* 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * For offline generated nexes, avoid depending on the private 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * NACL_IRT_PPAPIHOOK_PNACL_PRIVATE_v0_1 interface, and just do the 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * overriding here manually. 51a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) */ 52a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) struct nacl_irt_ppapihook real_irt_ppapi_hook; 53a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if ((*__pnacl_real_irt_query_func)(NACL_IRT_PPAPIHOOK_v0_1, 54a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) &real_irt_ppapi_hook, 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) sizeof real_irt_ppapi_hook) != 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sizeof real_irt_ppapi_hook) { 5758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch return 0; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) real_irt_ppapi_start = real_irt_ppapi_hook.ppapi_start; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copy the interface structure into the client. 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 6358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch struct nacl_irt_ppapihook *dest = table; 6458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch if (sizeof *dest <= tablesize) { 65a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) dest->ppapi_start = irt_shim_ppapi_start; 6658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch dest->ppapi_register_thread_creator = 6758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch real_irt_ppapi_hook.ppapi_register_thread_creator; 6858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch return sizeof *dest; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 71a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 73