1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* 2f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Mesa 3-D graphics library 3f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Version: 7.9 4f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 5f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Copyright (C) 2010 LunarG Inc. 6f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 7f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Permission is hereby granted, free of charge, to any person obtaining a 8f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * copy of this software and associated documentation files (the "Software"), 9f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * to deal in the Software without restriction, including without limitation 10f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * and/or sell copies of the Software, and to permit persons to whom the 12f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Software is furnished to do so, subject to the following conditions: 13f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 14f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * The above copyright notice and this permission notice shall be included 15f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * in all copies or substantial portions of the Software. 16f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 17f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * DEALINGS IN THE SOFTWARE. 24f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 25f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Authors: 26f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Chia-I Wu <olv@lunarg.com> 27f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 28f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 29f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include <stdlib.h> 30f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include <string.h> 31f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include <assert.h> 32f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 33f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "u_current.h" 34f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "u_thread.h" 35f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "entry.h" 36f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "stub.h" 37f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "table.h" 38f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 39f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0])) 40f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 41f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstruct mapi_stub { 42f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const void *name; 43f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org int slot; 44f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org mapi_func addr; 45f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org}; 46f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 47f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* define public_string_pool and public_stubs */ 48f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#define MAPI_TMP_PUBLIC_STUBS 49f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "mapi_tmp.h" 50f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 51f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic struct mapi_stub dynamic_stubs[MAPI_TABLE_NUM_DYNAMIC]; 52f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic int num_dynamic_stubs; 53f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic int next_dynamic_slot = MAPI_TABLE_NUM_STATIC; 54f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 55f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgvoid 56f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_init_once(void) 57f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 58f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#ifdef HAVE_PTHREAD 59f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org static pthread_once_t once = PTHREAD_ONCE_INIT; 60f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org pthread_once(&once, entry_patch_public); 61f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#else 62f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org static int first = 1; 63f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (first) { 64f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org first = 0; 65f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org entry_patch_public(); 66f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 67f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#endif 68f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 69f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 70f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic int 71f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_compare(const void *key, const void *elem) 72f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 73f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const char *name = (const char *) key; 74f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const struct mapi_stub *stub = (const struct mapi_stub *) elem; 75f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const char *stub_name; 76f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 77f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub_name = &public_string_pool[(unsigned long) stub->name]; 78f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 79f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return strcmp(name, stub_name); 80f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 81f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 82f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 83f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Return the public stub with the given name. 84f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 85f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgconst struct mapi_stub * 86f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_find_public(const char *name) 87f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 88f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return (const struct mapi_stub *) bsearch(name, public_stubs, 89f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ARRAY_SIZE(public_stubs), sizeof(public_stubs[0]), stub_compare); 90f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 91f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 92f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 93f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Add a dynamic stub. 94f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 95f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic struct mapi_stub * 96f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_add_dynamic(const char *name) 97f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 98f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org struct mapi_stub *stub; 99f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org int idx; 100f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 101f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org idx = num_dynamic_stubs; 102f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* minus 1 to make sure we can never reach the last slot */ 103f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (idx >= MAPI_TABLE_NUM_DYNAMIC - 1) 104f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return NULL; 105f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 106f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub = &dynamic_stubs[idx]; 107f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 108f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* dispatch to the last slot, which is reserved for no-op */ 109f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub->addr = entry_generate( 110f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org MAPI_TABLE_NUM_STATIC + MAPI_TABLE_NUM_DYNAMIC - 1); 111f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (!stub->addr) 112f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return NULL; 113f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 114f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub->name = (const void *) name; 115f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* to be fixed later */ 116f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub->slot = -1; 117f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 118f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org num_dynamic_stubs = idx + 1; 119f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 120f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return stub; 121f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 122f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 123f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 124f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Return the dynamic stub with the given name. If no such stub exists and 125f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * generate is true, a new stub is generated. 126f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 127f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstruct mapi_stub * 128f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_find_dynamic(const char *name, int generate) 129f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 130f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org u_mutex_declare_static(dynamic_mutex); 131f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org struct mapi_stub *stub = NULL; 132f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org int count, i; 133f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 134f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org u_mutex_lock(dynamic_mutex); 135f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 136f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (generate) 137f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org assert(!stub_find_public(name)); 138f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 139f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org count = num_dynamic_stubs; 140f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (i = 0; i < count; i++) { 141f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (strcmp(name, (const char *) dynamic_stubs[i].name) == 0) { 142f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub = &dynamic_stubs[i]; 143f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org break; 144f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 145f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 146f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 147f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* generate a dynamic stub */ 148f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (generate && !stub) 149f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub = stub_add_dynamic(name); 150f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 151f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org u_mutex_unlock(dynamic_mutex); 152f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 153f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return stub; 154f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 155f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 156f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgvoid 157f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_fix_dynamic(struct mapi_stub *stub, const struct mapi_stub *alias) 158f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 159f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org int slot; 160f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 161f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (stub->slot >= 0) 162f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return; 163f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 164f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (alias) 165f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org slot = alias->slot; 166f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else 167f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org slot = next_dynamic_slot++; 168f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 169f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org entry_patch(stub->addr, slot); 170f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub->slot = slot; 171f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 172f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 173f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 174f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Return the name of a stub. 175f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 176f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgconst char * 177f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_get_name(const struct mapi_stub *stub) 178f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 179f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const char *name; 180f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 181f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (stub >= public_stubs && 182f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org stub < public_stubs + ARRAY_SIZE(public_stubs)) 183f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org name = &public_string_pool[(unsigned long) stub->name]; 184f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else 185f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org name = (const char *) stub->name; 186f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 187f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return name; 188f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 189f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 190f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 191f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Return the slot of a stub. 192f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 193f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgint 194f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_get_slot(const struct mapi_stub *stub) 195f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 196f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return stub->slot; 197f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 198f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 199f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 200f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Return the address of a stub. 201f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 202f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgmapi_func 203f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstub_get_addr(const struct mapi_stub *stub) 204f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 205f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org assert(stub->addr || (unsigned int) stub->slot < MAPI_TABLE_NUM_STATIC); 206f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return (stub->addr) ? stub->addr : entry_get_public(stub->slot); 207f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 208