bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Host code generation |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 18 | */ |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 19 | #ifdef _WIN32 |
| 20 | #include <windows.h> |
| 21 | #else |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/mman.h> |
| 24 | #endif |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 25 | #include <stdarg.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <stdio.h> |
| 28 | #include <string.h> |
| 29 | #include <inttypes.h> |
| 30 | |
| 31 | #include "config.h" |
bellard | 2054396 | 2003-06-15 23:28:43 +0000 | [diff] [blame] | 32 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 33 | #include "qemu-common.h" |
bellard | af5ad10 | 2004-01-04 23:28:12 +0000 | [diff] [blame] | 34 | #define NO_CPU_IO_DEFS |
bellard | d3eead2 | 2003-09-30 20:59:51 +0000 | [diff] [blame] | 35 | #include "cpu.h" |
Paolo Bonzini | 76cad71 | 2012-10-24 11:12:21 +0200 | [diff] [blame] | 36 | #include "disas/disas.h" |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 37 | #include "tcg.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 38 | #if defined(CONFIG_USER_ONLY) |
| 39 | #include "qemu.h" |
| 40 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| 41 | #include <sys/param.h> |
| 42 | #if __FreeBSD_version >= 700104 |
| 43 | #define HAVE_KINFO_GETVMMAP |
| 44 | #define sigqueue sigqueue_freebsd /* avoid redefinition */ |
| 45 | #include <sys/time.h> |
| 46 | #include <sys/proc.h> |
| 47 | #include <machine/profile.h> |
| 48 | #define _KERNEL |
| 49 | #include <sys/user.h> |
| 50 | #undef _KERNEL |
| 51 | #undef sigqueue |
| 52 | #include <libutil.h> |
| 53 | #endif |
| 54 | #endif |
Paolo Bonzini | 0bc3cd6 | 2013-04-08 17:29:59 +0200 | [diff] [blame] | 55 | #else |
| 56 | #include "exec/address-spaces.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 57 | #endif |
| 58 | |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 59 | #include "exec/cputlb.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 60 | #include "translate-all.h" |
Alexey Kardashevskiy | 0aa0989 | 2013-04-22 17:42:50 +1000 | [diff] [blame] | 61 | #include "qemu/timer.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 62 | |
| 63 | //#define DEBUG_TB_INVALIDATE |
| 64 | //#define DEBUG_FLUSH |
| 65 | /* make various TB consistency checks */ |
| 66 | //#define DEBUG_TB_CHECK |
| 67 | |
| 68 | #if !defined(CONFIG_USER_ONLY) |
| 69 | /* TB consistency checks only implemented for usermode emulation. */ |
| 70 | #undef DEBUG_TB_CHECK |
| 71 | #endif |
| 72 | |
| 73 | #define SMC_BITMAP_USE_THRESHOLD 10 |
| 74 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 75 | typedef struct PageDesc { |
| 76 | /* list of TBs intersecting this ram page */ |
| 77 | TranslationBlock *first_tb; |
| 78 | /* in order to optimize self modifying code, we count the number |
| 79 | of lookups we do to a given page to use a bitmap */ |
| 80 | unsigned int code_write_count; |
| 81 | uint8_t *code_bitmap; |
| 82 | #if defined(CONFIG_USER_ONLY) |
| 83 | unsigned long flags; |
| 84 | #endif |
| 85 | } PageDesc; |
| 86 | |
| 87 | /* In system mode we want L1_MAP to be based on ram offsets, |
| 88 | while in user mode we want it to be based on virtual addresses. */ |
| 89 | #if !defined(CONFIG_USER_ONLY) |
| 90 | #if HOST_LONG_BITS < TARGET_PHYS_ADDR_SPACE_BITS |
| 91 | # define L1_MAP_ADDR_SPACE_BITS HOST_LONG_BITS |
| 92 | #else |
| 93 | # define L1_MAP_ADDR_SPACE_BITS TARGET_PHYS_ADDR_SPACE_BITS |
| 94 | #endif |
| 95 | #else |
| 96 | # define L1_MAP_ADDR_SPACE_BITS TARGET_VIRT_ADDR_SPACE_BITS |
| 97 | #endif |
| 98 | |
| 99 | /* The bits remaining after N lower levels of page tables. */ |
| 100 | #define V_L1_BITS_REM \ |
| 101 | ((L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS) % L2_BITS) |
| 102 | |
| 103 | #if V_L1_BITS_REM < 4 |
| 104 | #define V_L1_BITS (V_L1_BITS_REM + L2_BITS) |
| 105 | #else |
| 106 | #define V_L1_BITS V_L1_BITS_REM |
| 107 | #endif |
| 108 | |
| 109 | #define V_L1_SIZE ((target_ulong)1 << V_L1_BITS) |
| 110 | |
| 111 | #define V_L1_SHIFT (L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS - V_L1_BITS) |
| 112 | |
| 113 | uintptr_t qemu_real_host_page_size; |
| 114 | uintptr_t qemu_host_page_size; |
| 115 | uintptr_t qemu_host_page_mask; |
| 116 | |
| 117 | /* This is a multi-level map on the virtual address space. |
| 118 | The bottom level has pointers to PageDesc. */ |
| 119 | static void *l1_map[V_L1_SIZE]; |
| 120 | |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 121 | /* code generation context */ |
| 122 | TCGContext tcg_ctx; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 123 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 124 | static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc, |
| 125 | tb_page_addr_t phys_page2); |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 126 | static TranslationBlock *tb_find_pc(uintptr_t tc_ptr); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 127 | |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 128 | void cpu_gen_init(void) |
| 129 | { |
| 130 | tcg_context_init(&tcg_ctx); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 131 | } |
| 132 | |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 133 | /* return non zero if the very first instruction is invalid so that |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 134 | the virtual CPU can trigger an exception. |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 135 | |
| 136 | '*gen_code_size_ptr' contains the size of the generated code (host |
| 137 | code). |
| 138 | */ |
Andreas Färber | 9349b4f | 2012-03-14 01:38:32 +0100 | [diff] [blame] | 139 | int cpu_gen_code(CPUArchState *env, TranslationBlock *tb, int *gen_code_size_ptr) |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 140 | { |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 141 | TCGContext *s = &tcg_ctx; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 142 | uint8_t *gen_code_buf; |
| 143 | int gen_code_size; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 144 | #ifdef CONFIG_PROFILER |
| 145 | int64_t ti; |
| 146 | #endif |
| 147 | |
| 148 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 149 | s->tb_count1++; /* includes aborted translations because of |
| 150 | exceptions */ |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 151 | ti = profile_getclock(); |
| 152 | #endif |
| 153 | tcg_func_start(s); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 154 | |
ths | 2cfc5f1 | 2008-07-18 18:01:29 +0000 | [diff] [blame] | 155 | gen_intermediate_code(env, tb); |
| 156 | |
bellard | ec6338b | 2007-11-08 14:25:03 +0000 | [diff] [blame] | 157 | /* generate machine code */ |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 158 | gen_code_buf = tb->tc_ptr; |
bellard | ec6338b | 2007-11-08 14:25:03 +0000 | [diff] [blame] | 159 | tb->tb_next_offset[0] = 0xffff; |
| 160 | tb->tb_next_offset[1] = 0xffff; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 161 | s->tb_next_offset = tb->tb_next_offset; |
bellard | 4cbb86e | 2003-09-17 22:53:29 +0000 | [diff] [blame] | 162 | #ifdef USE_DIRECT_JUMP |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 163 | s->tb_jmp_offset = tb->tb_jmp_offset; |
| 164 | s->tb_next = NULL; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 165 | #else |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 166 | s->tb_jmp_offset = NULL; |
| 167 | s->tb_next = tb->tb_next; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 168 | #endif |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 169 | |
| 170 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 171 | s->tb_count++; |
| 172 | s->interm_time += profile_getclock() - ti; |
| 173 | s->code_time -= profile_getclock(); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 174 | #endif |
aurel32 | 54604f7 | 2008-12-07 20:35:00 +0000 | [diff] [blame] | 175 | gen_code_size = tcg_gen_code(s, gen_code_buf); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 176 | *gen_code_size_ptr = gen_code_size; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 177 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 178 | s->code_time += profile_getclock(); |
| 179 | s->code_in_len += tb->size; |
| 180 | s->code_out_len += gen_code_size; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 181 | #endif |
| 182 | |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 183 | #ifdef DEBUG_DISAS |
aliguori | 8fec2b8 | 2009-01-15 22:36:53 +0000 | [diff] [blame] | 184 | if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) { |
aliguori | 93fcfe3 | 2009-01-15 22:34:14 +0000 | [diff] [blame] | 185 | qemu_log("OUT: [size=%d]\n", *gen_code_size_ptr); |
| 186 | log_disas(tb->tc_ptr, *gen_code_size_ptr); |
| 187 | qemu_log("\n"); |
aliguori | 31b1a7b | 2009-01-15 22:35:09 +0000 | [diff] [blame] | 188 | qemu_log_flush(); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 189 | } |
| 190 | #endif |
| 191 | return 0; |
| 192 | } |
| 193 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 194 | /* The cpu state corresponding to 'searched_pc' is restored. |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 195 | */ |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 196 | static int cpu_restore_state_from_tb(TranslationBlock *tb, CPUArchState *env, |
| 197 | uintptr_t searched_pc) |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 198 | { |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 199 | TCGContext *s = &tcg_ctx; |
| 200 | int j; |
Stefan Weil | 6375e09 | 2012-04-06 22:26:15 +0200 | [diff] [blame] | 201 | uintptr_t tc_ptr; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 202 | #ifdef CONFIG_PROFILER |
| 203 | int64_t ti; |
| 204 | #endif |
| 205 | |
| 206 | #ifdef CONFIG_PROFILER |
| 207 | ti = profile_getclock(); |
| 208 | #endif |
| 209 | tcg_func_start(s); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 210 | |
ths | 2cfc5f1 | 2008-07-18 18:01:29 +0000 | [diff] [blame] | 211 | gen_intermediate_code_pc(env, tb); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 212 | |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 213 | if (use_icount) { |
| 214 | /* Reset the cycle counter to the start of the block. */ |
| 215 | env->icount_decr.u16.low += tb->icount; |
| 216 | /* Clear the IO flag. */ |
| 217 | env->can_do_io = 0; |
| 218 | } |
| 219 | |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 220 | /* find opc index corresponding to search_pc */ |
Stefan Weil | 6375e09 | 2012-04-06 22:26:15 +0200 | [diff] [blame] | 221 | tc_ptr = (uintptr_t)tb->tc_ptr; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 222 | if (searched_pc < tc_ptr) |
| 223 | return -1; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 224 | |
| 225 | s->tb_next_offset = tb->tb_next_offset; |
| 226 | #ifdef USE_DIRECT_JUMP |
| 227 | s->tb_jmp_offset = tb->tb_jmp_offset; |
| 228 | s->tb_next = NULL; |
| 229 | #else |
| 230 | s->tb_jmp_offset = NULL; |
| 231 | s->tb_next = tb->tb_next; |
| 232 | #endif |
aurel32 | 54604f7 | 2008-12-07 20:35:00 +0000 | [diff] [blame] | 233 | j = tcg_gen_code_search_pc(s, (uint8_t *)tc_ptr, searched_pc - tc_ptr); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 234 | if (j < 0) |
| 235 | return -1; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 236 | /* now find start of instruction before */ |
Evgeny Voevodin | ab1103d | 2012-11-21 11:43:06 +0400 | [diff] [blame] | 237 | while (s->gen_opc_instr_start[j] == 0) { |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 238 | j--; |
Evgeny Voevodin | ab1103d | 2012-11-21 11:43:06 +0400 | [diff] [blame] | 239 | } |
Evgeny Voevodin | c9c99c2 | 2012-11-21 11:43:05 +0400 | [diff] [blame] | 240 | env->icount_decr.u16.low -= s->gen_opc_icount[j]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 241 | |
Stefan Weil | e87b7cb | 2011-04-18 06:39:52 +0000 | [diff] [blame] | 242 | restore_state_to_opc(env, tb, j); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 243 | |
| 244 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 245 | s->restore_time += profile_getclock() - ti; |
| 246 | s->restore_count++; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 247 | #endif |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 248 | return 0; |
| 249 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 250 | |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 251 | bool cpu_restore_state(CPUArchState *env, uintptr_t retaddr) |
| 252 | { |
| 253 | TranslationBlock *tb; |
| 254 | |
| 255 | tb = tb_find_pc(retaddr); |
| 256 | if (tb) { |
| 257 | cpu_restore_state_from_tb(tb, env, retaddr); |
| 258 | return true; |
| 259 | } |
| 260 | return false; |
| 261 | } |
| 262 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 263 | #ifdef _WIN32 |
| 264 | static inline void map_exec(void *addr, long size) |
| 265 | { |
| 266 | DWORD old_protect; |
| 267 | VirtualProtect(addr, size, |
| 268 | PAGE_EXECUTE_READWRITE, &old_protect); |
| 269 | } |
| 270 | #else |
| 271 | static inline void map_exec(void *addr, long size) |
| 272 | { |
| 273 | unsigned long start, end, page_size; |
| 274 | |
| 275 | page_size = getpagesize(); |
| 276 | start = (unsigned long)addr; |
| 277 | start &= ~(page_size - 1); |
| 278 | |
| 279 | end = (unsigned long)addr + size; |
| 280 | end += page_size - 1; |
| 281 | end &= ~(page_size - 1); |
| 282 | |
| 283 | mprotect((void *)start, end - start, |
| 284 | PROT_READ | PROT_WRITE | PROT_EXEC); |
| 285 | } |
| 286 | #endif |
| 287 | |
| 288 | static void page_init(void) |
| 289 | { |
| 290 | /* NOTE: we can always suppose that qemu_host_page_size >= |
| 291 | TARGET_PAGE_SIZE */ |
| 292 | #ifdef _WIN32 |
| 293 | { |
| 294 | SYSTEM_INFO system_info; |
| 295 | |
| 296 | GetSystemInfo(&system_info); |
| 297 | qemu_real_host_page_size = system_info.dwPageSize; |
| 298 | } |
| 299 | #else |
| 300 | qemu_real_host_page_size = getpagesize(); |
| 301 | #endif |
| 302 | if (qemu_host_page_size == 0) { |
| 303 | qemu_host_page_size = qemu_real_host_page_size; |
| 304 | } |
| 305 | if (qemu_host_page_size < TARGET_PAGE_SIZE) { |
| 306 | qemu_host_page_size = TARGET_PAGE_SIZE; |
| 307 | } |
| 308 | qemu_host_page_mask = ~(qemu_host_page_size - 1); |
| 309 | |
| 310 | #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY) |
| 311 | { |
| 312 | #ifdef HAVE_KINFO_GETVMMAP |
| 313 | struct kinfo_vmentry *freep; |
| 314 | int i, cnt; |
| 315 | |
| 316 | freep = kinfo_getvmmap(getpid(), &cnt); |
| 317 | if (freep) { |
| 318 | mmap_lock(); |
| 319 | for (i = 0; i < cnt; i++) { |
| 320 | unsigned long startaddr, endaddr; |
| 321 | |
| 322 | startaddr = freep[i].kve_start; |
| 323 | endaddr = freep[i].kve_end; |
| 324 | if (h2g_valid(startaddr)) { |
| 325 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; |
| 326 | |
| 327 | if (h2g_valid(endaddr)) { |
| 328 | endaddr = h2g(endaddr); |
| 329 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
| 330 | } else { |
| 331 | #if TARGET_ABI_BITS <= L1_MAP_ADDR_SPACE_BITS |
| 332 | endaddr = ~0ul; |
| 333 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
| 334 | #endif |
| 335 | } |
| 336 | } |
| 337 | } |
| 338 | free(freep); |
| 339 | mmap_unlock(); |
| 340 | } |
| 341 | #else |
| 342 | FILE *f; |
| 343 | |
| 344 | last_brk = (unsigned long)sbrk(0); |
| 345 | |
| 346 | f = fopen("/compat/linux/proc/self/maps", "r"); |
| 347 | if (f) { |
| 348 | mmap_lock(); |
| 349 | |
| 350 | do { |
| 351 | unsigned long startaddr, endaddr; |
| 352 | int n; |
| 353 | |
| 354 | n = fscanf(f, "%lx-%lx %*[^\n]\n", &startaddr, &endaddr); |
| 355 | |
| 356 | if (n == 2 && h2g_valid(startaddr)) { |
| 357 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; |
| 358 | |
| 359 | if (h2g_valid(endaddr)) { |
| 360 | endaddr = h2g(endaddr); |
| 361 | } else { |
| 362 | endaddr = ~0ul; |
| 363 | } |
| 364 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
| 365 | } |
| 366 | } while (!feof(f)); |
| 367 | |
| 368 | fclose(f); |
| 369 | mmap_unlock(); |
| 370 | } |
| 371 | #endif |
| 372 | } |
| 373 | #endif |
| 374 | } |
| 375 | |
| 376 | static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) |
| 377 | { |
| 378 | PageDesc *pd; |
| 379 | void **lp; |
| 380 | int i; |
| 381 | |
| 382 | #if defined(CONFIG_USER_ONLY) |
| 383 | /* We can't use g_malloc because it may recurse into a locked mutex. */ |
| 384 | # define ALLOC(P, SIZE) \ |
| 385 | do { \ |
| 386 | P = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, \ |
| 387 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \ |
| 388 | } while (0) |
| 389 | #else |
| 390 | # define ALLOC(P, SIZE) \ |
| 391 | do { P = g_malloc0(SIZE); } while (0) |
| 392 | #endif |
| 393 | |
| 394 | /* Level 1. Always allocated. */ |
| 395 | lp = l1_map + ((index >> V_L1_SHIFT) & (V_L1_SIZE - 1)); |
| 396 | |
| 397 | /* Level 2..N-1. */ |
| 398 | for (i = V_L1_SHIFT / L2_BITS - 1; i > 0; i--) { |
| 399 | void **p = *lp; |
| 400 | |
| 401 | if (p == NULL) { |
| 402 | if (!alloc) { |
| 403 | return NULL; |
| 404 | } |
| 405 | ALLOC(p, sizeof(void *) * L2_SIZE); |
| 406 | *lp = p; |
| 407 | } |
| 408 | |
| 409 | lp = p + ((index >> (i * L2_BITS)) & (L2_SIZE - 1)); |
| 410 | } |
| 411 | |
| 412 | pd = *lp; |
| 413 | if (pd == NULL) { |
| 414 | if (!alloc) { |
| 415 | return NULL; |
| 416 | } |
| 417 | ALLOC(pd, sizeof(PageDesc) * L2_SIZE); |
| 418 | *lp = pd; |
| 419 | } |
| 420 | |
| 421 | #undef ALLOC |
| 422 | |
| 423 | return pd + (index & (L2_SIZE - 1)); |
| 424 | } |
| 425 | |
| 426 | static inline PageDesc *page_find(tb_page_addr_t index) |
| 427 | { |
| 428 | return page_find_alloc(index, 0); |
| 429 | } |
| 430 | |
| 431 | #if !defined(CONFIG_USER_ONLY) |
| 432 | #define mmap_lock() do { } while (0) |
| 433 | #define mmap_unlock() do { } while (0) |
| 434 | #endif |
| 435 | |
| 436 | #if defined(CONFIG_USER_ONLY) |
| 437 | /* Currently it is not recommended to allocate big chunks of data in |
| 438 | user mode. It will change when a dedicated libc will be used. */ |
| 439 | /* ??? 64-bit hosts ought to have no problem mmaping data outside the |
| 440 | region in which the guest needs to run. Revisit this. */ |
| 441 | #define USE_STATIC_CODE_GEN_BUFFER |
| 442 | #endif |
| 443 | |
| 444 | /* ??? Should configure for this, not list operating systems here. */ |
| 445 | #if (defined(__linux__) \ |
| 446 | || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \ |
| 447 | || defined(__DragonFly__) || defined(__OpenBSD__) \ |
| 448 | || defined(__NetBSD__)) |
| 449 | # define USE_MMAP |
| 450 | #endif |
| 451 | |
| 452 | /* Minimum size of the code gen buffer. This number is randomly chosen, |
| 453 | but not so small that we can't have a fair number of TB's live. */ |
| 454 | #define MIN_CODE_GEN_BUFFER_SIZE (1024u * 1024) |
| 455 | |
| 456 | /* Maximum size of the code gen buffer we'd like to use. Unless otherwise |
| 457 | indicated, this is constrained by the range of direct branches on the |
| 458 | host cpu, as used by the TCG implementation of goto_tb. */ |
| 459 | #if defined(__x86_64__) |
| 460 | # define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024) |
| 461 | #elif defined(__sparc__) |
| 462 | # define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024) |
Claudio Fontana | 4a136e0 | 2013-06-12 16:20:22 +0100 | [diff] [blame] | 463 | #elif defined(__aarch64__) |
| 464 | # define MAX_CODE_GEN_BUFFER_SIZE (128ul * 1024 * 1024) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 465 | #elif defined(__arm__) |
| 466 | # define MAX_CODE_GEN_BUFFER_SIZE (16u * 1024 * 1024) |
| 467 | #elif defined(__s390x__) |
| 468 | /* We have a +- 4GB range on the branches; leave some slop. */ |
| 469 | # define MAX_CODE_GEN_BUFFER_SIZE (3ul * 1024 * 1024 * 1024) |
| 470 | #else |
| 471 | # define MAX_CODE_GEN_BUFFER_SIZE ((size_t)-1) |
| 472 | #endif |
| 473 | |
| 474 | #define DEFAULT_CODE_GEN_BUFFER_SIZE_1 (32u * 1024 * 1024) |
| 475 | |
| 476 | #define DEFAULT_CODE_GEN_BUFFER_SIZE \ |
| 477 | (DEFAULT_CODE_GEN_BUFFER_SIZE_1 < MAX_CODE_GEN_BUFFER_SIZE \ |
| 478 | ? DEFAULT_CODE_GEN_BUFFER_SIZE_1 : MAX_CODE_GEN_BUFFER_SIZE) |
| 479 | |
| 480 | static inline size_t size_code_gen_buffer(size_t tb_size) |
| 481 | { |
| 482 | /* Size the buffer. */ |
| 483 | if (tb_size == 0) { |
| 484 | #ifdef USE_STATIC_CODE_GEN_BUFFER |
| 485 | tb_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
| 486 | #else |
| 487 | /* ??? Needs adjustments. */ |
| 488 | /* ??? If we relax the requirement that CONFIG_USER_ONLY use the |
| 489 | static buffer, we could size this on RESERVED_VA, on the text |
| 490 | segment size of the executable, or continue to use the default. */ |
| 491 | tb_size = (unsigned long)(ram_size / 4); |
| 492 | #endif |
| 493 | } |
| 494 | if (tb_size < MIN_CODE_GEN_BUFFER_SIZE) { |
| 495 | tb_size = MIN_CODE_GEN_BUFFER_SIZE; |
| 496 | } |
| 497 | if (tb_size > MAX_CODE_GEN_BUFFER_SIZE) { |
| 498 | tb_size = MAX_CODE_GEN_BUFFER_SIZE; |
| 499 | } |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 500 | tcg_ctx.code_gen_buffer_size = tb_size; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 501 | return tb_size; |
| 502 | } |
| 503 | |
| 504 | #ifdef USE_STATIC_CODE_GEN_BUFFER |
| 505 | static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE] |
| 506 | __attribute__((aligned(CODE_GEN_ALIGN))); |
| 507 | |
| 508 | static inline void *alloc_code_gen_buffer(void) |
| 509 | { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 510 | map_exec(static_code_gen_buffer, tcg_ctx.code_gen_buffer_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 511 | return static_code_gen_buffer; |
| 512 | } |
| 513 | #elif defined(USE_MMAP) |
| 514 | static inline void *alloc_code_gen_buffer(void) |
| 515 | { |
| 516 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
| 517 | uintptr_t start = 0; |
| 518 | void *buf; |
| 519 | |
| 520 | /* Constrain the position of the buffer based on the host cpu. |
| 521 | Note that these addresses are chosen in concert with the |
| 522 | addresses assigned in the relevant linker script file. */ |
| 523 | # if defined(__PIE__) || defined(__PIC__) |
| 524 | /* Don't bother setting a preferred location if we're building |
| 525 | a position-independent executable. We're more likely to get |
| 526 | an address near the main executable if we let the kernel |
| 527 | choose the address. */ |
| 528 | # elif defined(__x86_64__) && defined(MAP_32BIT) |
| 529 | /* Force the memory down into low memory with the executable. |
| 530 | Leave the choice of exact location with the kernel. */ |
| 531 | flags |= MAP_32BIT; |
| 532 | /* Cannot expect to map more than 800MB in low memory. */ |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 533 | if (tcg_ctx.code_gen_buffer_size > 800u * 1024 * 1024) { |
| 534 | tcg_ctx.code_gen_buffer_size = 800u * 1024 * 1024; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 535 | } |
| 536 | # elif defined(__sparc__) |
| 537 | start = 0x40000000ul; |
| 538 | # elif defined(__s390x__) |
| 539 | start = 0x90000000ul; |
| 540 | # endif |
| 541 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 542 | buf = mmap((void *)start, tcg_ctx.code_gen_buffer_size, |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 543 | PROT_WRITE | PROT_READ | PROT_EXEC, flags, -1, 0); |
| 544 | return buf == MAP_FAILED ? NULL : buf; |
| 545 | } |
| 546 | #else |
| 547 | static inline void *alloc_code_gen_buffer(void) |
| 548 | { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 549 | void *buf = g_malloc(tcg_ctx.code_gen_buffer_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 550 | |
| 551 | if (buf) { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 552 | map_exec(buf, tcg_ctx.code_gen_buffer_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 553 | } |
| 554 | return buf; |
| 555 | } |
| 556 | #endif /* USE_STATIC_CODE_GEN_BUFFER, USE_MMAP */ |
| 557 | |
| 558 | static inline void code_gen_alloc(size_t tb_size) |
| 559 | { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 560 | tcg_ctx.code_gen_buffer_size = size_code_gen_buffer(tb_size); |
| 561 | tcg_ctx.code_gen_buffer = alloc_code_gen_buffer(); |
| 562 | if (tcg_ctx.code_gen_buffer == NULL) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 563 | fprintf(stderr, "Could not allocate dynamic translator buffer\n"); |
| 564 | exit(1); |
| 565 | } |
| 566 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 567 | qemu_madvise(tcg_ctx.code_gen_buffer, tcg_ctx.code_gen_buffer_size, |
| 568 | QEMU_MADV_HUGEPAGE); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 569 | |
| 570 | /* Steal room for the prologue at the end of the buffer. This ensures |
| 571 | (via the MAX_CODE_GEN_BUFFER_SIZE limits above) that direct branches |
| 572 | from TB's to the prologue are going to be in range. It also means |
| 573 | that we don't need to mark (additional) portions of the data segment |
| 574 | as executable. */ |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 575 | tcg_ctx.code_gen_prologue = tcg_ctx.code_gen_buffer + |
| 576 | tcg_ctx.code_gen_buffer_size - 1024; |
| 577 | tcg_ctx.code_gen_buffer_size -= 1024; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 578 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 579 | tcg_ctx.code_gen_buffer_max_size = tcg_ctx.code_gen_buffer_size - |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 580 | (TCG_MAX_OP_SIZE * OPC_BUF_SIZE); |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 581 | tcg_ctx.code_gen_max_blocks = tcg_ctx.code_gen_buffer_size / |
| 582 | CODE_GEN_AVG_BLOCK_SIZE; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 583 | tcg_ctx.tb_ctx.tbs = |
| 584 | g_malloc(tcg_ctx.code_gen_max_blocks * sizeof(TranslationBlock)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | /* Must be called before using the QEMU cpus. 'tb_size' is the size |
| 588 | (in bytes) allocated to the translation buffer. Zero means default |
| 589 | size. */ |
| 590 | void tcg_exec_init(unsigned long tb_size) |
| 591 | { |
| 592 | cpu_gen_init(); |
| 593 | code_gen_alloc(tb_size); |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 594 | tcg_ctx.code_gen_ptr = tcg_ctx.code_gen_buffer; |
| 595 | tcg_register_jit(tcg_ctx.code_gen_buffer, tcg_ctx.code_gen_buffer_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 596 | page_init(); |
| 597 | #if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE) |
| 598 | /* There's no guest base to take into account, so go ahead and |
| 599 | initialize the prologue now. */ |
| 600 | tcg_prologue_init(&tcg_ctx); |
| 601 | #endif |
| 602 | } |
| 603 | |
| 604 | bool tcg_enabled(void) |
| 605 | { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 606 | return tcg_ctx.code_gen_buffer != NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | /* Allocate a new translation block. Flush the translation buffer if |
| 610 | too many translation blocks or too much generated code. */ |
| 611 | static TranslationBlock *tb_alloc(target_ulong pc) |
| 612 | { |
| 613 | TranslationBlock *tb; |
| 614 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 615 | if (tcg_ctx.tb_ctx.nb_tbs >= tcg_ctx.code_gen_max_blocks || |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 616 | (tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer) >= |
| 617 | tcg_ctx.code_gen_buffer_max_size) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 618 | return NULL; |
| 619 | } |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 620 | tb = &tcg_ctx.tb_ctx.tbs[tcg_ctx.tb_ctx.nb_tbs++]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 621 | tb->pc = pc; |
| 622 | tb->cflags = 0; |
| 623 | return tb; |
| 624 | } |
| 625 | |
| 626 | void tb_free(TranslationBlock *tb) |
| 627 | { |
| 628 | /* In practice this is mostly used for single use temporary TB |
| 629 | Ignore the hard cases and just back up if this TB happens to |
| 630 | be the last one generated. */ |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 631 | if (tcg_ctx.tb_ctx.nb_tbs > 0 && |
| 632 | tb == &tcg_ctx.tb_ctx.tbs[tcg_ctx.tb_ctx.nb_tbs - 1]) { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 633 | tcg_ctx.code_gen_ptr = tb->tc_ptr; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 634 | tcg_ctx.tb_ctx.nb_tbs--; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 635 | } |
| 636 | } |
| 637 | |
| 638 | static inline void invalidate_page_bitmap(PageDesc *p) |
| 639 | { |
| 640 | if (p->code_bitmap) { |
| 641 | g_free(p->code_bitmap); |
| 642 | p->code_bitmap = NULL; |
| 643 | } |
| 644 | p->code_write_count = 0; |
| 645 | } |
| 646 | |
| 647 | /* Set to NULL all the 'first_tb' fields in all PageDescs. */ |
| 648 | static void page_flush_tb_1(int level, void **lp) |
| 649 | { |
| 650 | int i; |
| 651 | |
| 652 | if (*lp == NULL) { |
| 653 | return; |
| 654 | } |
| 655 | if (level == 0) { |
| 656 | PageDesc *pd = *lp; |
| 657 | |
| 658 | for (i = 0; i < L2_SIZE; ++i) { |
| 659 | pd[i].first_tb = NULL; |
| 660 | invalidate_page_bitmap(pd + i); |
| 661 | } |
| 662 | } else { |
| 663 | void **pp = *lp; |
| 664 | |
| 665 | for (i = 0; i < L2_SIZE; ++i) { |
| 666 | page_flush_tb_1(level - 1, pp + i); |
| 667 | } |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | static void page_flush_tb(void) |
| 672 | { |
| 673 | int i; |
| 674 | |
| 675 | for (i = 0; i < V_L1_SIZE; i++) { |
| 676 | page_flush_tb_1(V_L1_SHIFT / L2_BITS - 1, l1_map + i); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | /* flush all the translation blocks */ |
| 681 | /* XXX: tb_flush is currently not thread safe */ |
| 682 | void tb_flush(CPUArchState *env1) |
| 683 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 684 | CPUState *cpu; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 685 | |
| 686 | #if defined(DEBUG_FLUSH) |
| 687 | printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n", |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 688 | (unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer), |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 689 | tcg_ctx.tb_ctx.nb_tbs, tcg_ctx.tb_ctx.nb_tbs > 0 ? |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 690 | ((unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer)) / |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 691 | tcg_ctx.tb_ctx.nb_tbs : 0); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 692 | #endif |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 693 | if ((unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer) |
| 694 | > tcg_ctx.code_gen_buffer_size) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 695 | cpu_abort(env1, "Internal error: code buffer overflow\n"); |
| 696 | } |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 697 | tcg_ctx.tb_ctx.nb_tbs = 0; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 698 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 699 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 700 | CPUArchState *env = cpu->env_ptr; |
| 701 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 702 | memset(env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *)); |
| 703 | } |
| 704 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 705 | memset(tcg_ctx.tb_ctx.tb_phys_hash, 0, |
| 706 | CODE_GEN_PHYS_HASH_SIZE * sizeof(void *)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 707 | page_flush_tb(); |
| 708 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 709 | tcg_ctx.code_gen_ptr = tcg_ctx.code_gen_buffer; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 710 | /* XXX: flush processor icache at this point if cache flush is |
| 711 | expensive */ |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 712 | tcg_ctx.tb_ctx.tb_flush_count++; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | #ifdef DEBUG_TB_CHECK |
| 716 | |
| 717 | static void tb_invalidate_check(target_ulong address) |
| 718 | { |
| 719 | TranslationBlock *tb; |
| 720 | int i; |
| 721 | |
| 722 | address &= TARGET_PAGE_MASK; |
| 723 | for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 724 | for (tb = tb_ctx.tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 725 | if (!(address + TARGET_PAGE_SIZE <= tb->pc || |
| 726 | address >= tb->pc + tb->size)) { |
| 727 | printf("ERROR invalidate: address=" TARGET_FMT_lx |
| 728 | " PC=%08lx size=%04x\n", |
| 729 | address, (long)tb->pc, tb->size); |
| 730 | } |
| 731 | } |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | /* verify that all the pages have correct rights for code */ |
| 736 | static void tb_page_check(void) |
| 737 | { |
| 738 | TranslationBlock *tb; |
| 739 | int i, flags1, flags2; |
| 740 | |
| 741 | for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 742 | for (tb = tcg_ctx.tb_ctx.tb_phys_hash[i]; tb != NULL; |
| 743 | tb = tb->phys_hash_next) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 744 | flags1 = page_get_flags(tb->pc); |
| 745 | flags2 = page_get_flags(tb->pc + tb->size - 1); |
| 746 | if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) { |
| 747 | printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n", |
| 748 | (long)tb->pc, tb->size, flags1, flags2); |
| 749 | } |
| 750 | } |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | #endif |
| 755 | |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 756 | static inline void tb_hash_remove(TranslationBlock **ptb, TranslationBlock *tb) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 757 | { |
| 758 | TranslationBlock *tb1; |
| 759 | |
| 760 | for (;;) { |
| 761 | tb1 = *ptb; |
| 762 | if (tb1 == tb) { |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 763 | *ptb = tb1->phys_hash_next; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 764 | break; |
| 765 | } |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 766 | ptb = &tb1->phys_hash_next; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 767 | } |
| 768 | } |
| 769 | |
| 770 | static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
| 771 | { |
| 772 | TranslationBlock *tb1; |
| 773 | unsigned int n1; |
| 774 | |
| 775 | for (;;) { |
| 776 | tb1 = *ptb; |
| 777 | n1 = (uintptr_t)tb1 & 3; |
| 778 | tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3); |
| 779 | if (tb1 == tb) { |
| 780 | *ptb = tb1->page_next[n1]; |
| 781 | break; |
| 782 | } |
| 783 | ptb = &tb1->page_next[n1]; |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
| 788 | { |
| 789 | TranslationBlock *tb1, **ptb; |
| 790 | unsigned int n1; |
| 791 | |
| 792 | ptb = &tb->jmp_next[n]; |
| 793 | tb1 = *ptb; |
| 794 | if (tb1) { |
| 795 | /* find tb(n) in circular list */ |
| 796 | for (;;) { |
| 797 | tb1 = *ptb; |
| 798 | n1 = (uintptr_t)tb1 & 3; |
| 799 | tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3); |
| 800 | if (n1 == n && tb1 == tb) { |
| 801 | break; |
| 802 | } |
| 803 | if (n1 == 2) { |
| 804 | ptb = &tb1->jmp_first; |
| 805 | } else { |
| 806 | ptb = &tb1->jmp_next[n1]; |
| 807 | } |
| 808 | } |
| 809 | /* now we can suppress tb(n) from the list */ |
| 810 | *ptb = tb->jmp_next[n]; |
| 811 | |
| 812 | tb->jmp_next[n] = NULL; |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | /* reset the jump entry 'n' of a TB so that it is not chained to |
| 817 | another TB */ |
| 818 | static inline void tb_reset_jump(TranslationBlock *tb, int n) |
| 819 | { |
| 820 | tb_set_jmp_target(tb, n, (uintptr_t)(tb->tc_ptr + tb->tb_next_offset[n])); |
| 821 | } |
| 822 | |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 823 | /* invalidate one TB */ |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 824 | void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr) |
| 825 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 826 | CPUState *cpu; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 827 | PageDesc *p; |
| 828 | unsigned int h, n1; |
| 829 | tb_page_addr_t phys_pc; |
| 830 | TranslationBlock *tb1, *tb2; |
| 831 | |
| 832 | /* remove the TB from the hash list */ |
| 833 | phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); |
| 834 | h = tb_phys_hash_func(phys_pc); |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 835 | tb_hash_remove(&tcg_ctx.tb_ctx.tb_phys_hash[h], tb); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 836 | |
| 837 | /* remove the TB from the page list */ |
| 838 | if (tb->page_addr[0] != page_addr) { |
| 839 | p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS); |
| 840 | tb_page_remove(&p->first_tb, tb); |
| 841 | invalidate_page_bitmap(p); |
| 842 | } |
| 843 | if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
| 844 | p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS); |
| 845 | tb_page_remove(&p->first_tb, tb); |
| 846 | invalidate_page_bitmap(p); |
| 847 | } |
| 848 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 849 | tcg_ctx.tb_ctx.tb_invalidated_flag = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 850 | |
| 851 | /* remove the TB from the hash list */ |
| 852 | h = tb_jmp_cache_hash_func(tb->pc); |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 853 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 854 | CPUArchState *env = cpu->env_ptr; |
| 855 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 856 | if (env->tb_jmp_cache[h] == tb) { |
| 857 | env->tb_jmp_cache[h] = NULL; |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | /* suppress this TB from the two jump lists */ |
| 862 | tb_jmp_remove(tb, 0); |
| 863 | tb_jmp_remove(tb, 1); |
| 864 | |
| 865 | /* suppress any remaining jumps to this TB */ |
| 866 | tb1 = tb->jmp_first; |
| 867 | for (;;) { |
| 868 | n1 = (uintptr_t)tb1 & 3; |
| 869 | if (n1 == 2) { |
| 870 | break; |
| 871 | } |
| 872 | tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3); |
| 873 | tb2 = tb1->jmp_next[n1]; |
| 874 | tb_reset_jump(tb1, n1); |
| 875 | tb1->jmp_next[n1] = NULL; |
| 876 | tb1 = tb2; |
| 877 | } |
| 878 | tb->jmp_first = (TranslationBlock *)((uintptr_t)tb | 2); /* fail safe */ |
| 879 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 880 | tcg_ctx.tb_ctx.tb_phys_invalidate_count++; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | static inline void set_bits(uint8_t *tab, int start, int len) |
| 884 | { |
| 885 | int end, mask, end1; |
| 886 | |
| 887 | end = start + len; |
| 888 | tab += start >> 3; |
| 889 | mask = 0xff << (start & 7); |
| 890 | if ((start & ~7) == (end & ~7)) { |
| 891 | if (start < end) { |
| 892 | mask &= ~(0xff << (end & 7)); |
| 893 | *tab |= mask; |
| 894 | } |
| 895 | } else { |
| 896 | *tab++ |= mask; |
| 897 | start = (start + 8) & ~7; |
| 898 | end1 = end & ~7; |
| 899 | while (start < end1) { |
| 900 | *tab++ = 0xff; |
| 901 | start += 8; |
| 902 | } |
| 903 | if (start < end) { |
| 904 | mask = ~(0xff << (end & 7)); |
| 905 | *tab |= mask; |
| 906 | } |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | static void build_page_bitmap(PageDesc *p) |
| 911 | { |
| 912 | int n, tb_start, tb_end; |
| 913 | TranslationBlock *tb; |
| 914 | |
| 915 | p->code_bitmap = g_malloc0(TARGET_PAGE_SIZE / 8); |
| 916 | |
| 917 | tb = p->first_tb; |
| 918 | while (tb != NULL) { |
| 919 | n = (uintptr_t)tb & 3; |
| 920 | tb = (TranslationBlock *)((uintptr_t)tb & ~3); |
| 921 | /* NOTE: this is subtle as a TB may span two physical pages */ |
| 922 | if (n == 0) { |
| 923 | /* NOTE: tb_end may be after the end of the page, but |
| 924 | it is not a problem */ |
| 925 | tb_start = tb->pc & ~TARGET_PAGE_MASK; |
| 926 | tb_end = tb_start + tb->size; |
| 927 | if (tb_end > TARGET_PAGE_SIZE) { |
| 928 | tb_end = TARGET_PAGE_SIZE; |
| 929 | } |
| 930 | } else { |
| 931 | tb_start = 0; |
| 932 | tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 933 | } |
| 934 | set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
| 935 | tb = tb->page_next[n]; |
| 936 | } |
| 937 | } |
| 938 | |
| 939 | TranslationBlock *tb_gen_code(CPUArchState *env, |
| 940 | target_ulong pc, target_ulong cs_base, |
| 941 | int flags, int cflags) |
| 942 | { |
| 943 | TranslationBlock *tb; |
| 944 | uint8_t *tc_ptr; |
| 945 | tb_page_addr_t phys_pc, phys_page2; |
| 946 | target_ulong virt_page2; |
| 947 | int code_gen_size; |
| 948 | |
| 949 | phys_pc = get_page_addr_code(env, pc); |
| 950 | tb = tb_alloc(pc); |
| 951 | if (!tb) { |
| 952 | /* flush must be done */ |
| 953 | tb_flush(env); |
| 954 | /* cannot fail at this point */ |
| 955 | tb = tb_alloc(pc); |
| 956 | /* Don't forget to invalidate previous TB info. */ |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 957 | tcg_ctx.tb_ctx.tb_invalidated_flag = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 958 | } |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 959 | tc_ptr = tcg_ctx.code_gen_ptr; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 960 | tb->tc_ptr = tc_ptr; |
| 961 | tb->cs_base = cs_base; |
| 962 | tb->flags = flags; |
| 963 | tb->cflags = cflags; |
| 964 | cpu_gen_code(env, tb, &code_gen_size); |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 965 | tcg_ctx.code_gen_ptr = (void *)(((uintptr_t)tcg_ctx.code_gen_ptr + |
| 966 | code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 967 | |
| 968 | /* check next page if needed */ |
| 969 | virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK; |
| 970 | phys_page2 = -1; |
| 971 | if ((pc & TARGET_PAGE_MASK) != virt_page2) { |
| 972 | phys_page2 = get_page_addr_code(env, virt_page2); |
| 973 | } |
| 974 | tb_link_page(tb, phys_pc, phys_page2); |
| 975 | return tb; |
| 976 | } |
| 977 | |
| 978 | /* |
| 979 | * Invalidate all TBs which intersect with the target physical address range |
| 980 | * [start;end[. NOTE: start and end may refer to *different* physical pages. |
| 981 | * 'is_cpu_write_access' should be true if called from a real cpu write |
| 982 | * access: the virtual CPU will exit the current TB if code is modified inside |
| 983 | * this TB. |
| 984 | */ |
| 985 | void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end, |
| 986 | int is_cpu_write_access) |
| 987 | { |
| 988 | while (start < end) { |
| 989 | tb_invalidate_phys_page_range(start, end, is_cpu_write_access); |
| 990 | start &= TARGET_PAGE_MASK; |
| 991 | start += TARGET_PAGE_SIZE; |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | * Invalidate all TBs which intersect with the target physical address range |
| 997 | * [start;end[. NOTE: start and end must refer to the *same* physical page. |
| 998 | * 'is_cpu_write_access' should be true if called from a real cpu write |
| 999 | * access: the virtual CPU will exit the current TB if code is modified inside |
| 1000 | * this TB. |
| 1001 | */ |
| 1002 | void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end, |
| 1003 | int is_cpu_write_access) |
| 1004 | { |
| 1005 | TranslationBlock *tb, *tb_next, *saved_tb; |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1006 | CPUState *cpu = current_cpu; |
| 1007 | #if defined(TARGET_HAS_PRECISE_SMC) || !defined(CONFIG_USER_ONLY) |
| 1008 | CPUArchState *env = NULL; |
| 1009 | #endif |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1010 | tb_page_addr_t tb_start, tb_end; |
| 1011 | PageDesc *p; |
| 1012 | int n; |
| 1013 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1014 | int current_tb_not_found = is_cpu_write_access; |
| 1015 | TranslationBlock *current_tb = NULL; |
| 1016 | int current_tb_modified = 0; |
| 1017 | target_ulong current_pc = 0; |
| 1018 | target_ulong current_cs_base = 0; |
| 1019 | int current_flags = 0; |
| 1020 | #endif /* TARGET_HAS_PRECISE_SMC */ |
| 1021 | |
| 1022 | p = page_find(start >> TARGET_PAGE_BITS); |
| 1023 | if (!p) { |
| 1024 | return; |
| 1025 | } |
| 1026 | if (!p->code_bitmap && |
| 1027 | ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && |
| 1028 | is_cpu_write_access) { |
| 1029 | /* build code bitmap */ |
| 1030 | build_page_bitmap(p); |
| 1031 | } |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1032 | #if defined(TARGET_HAS_PRECISE_SMC) || !defined(CONFIG_USER_ONLY) |
| 1033 | if (cpu != NULL) { |
| 1034 | env = cpu->env_ptr; |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1035 | } |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1036 | #endif |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1037 | |
| 1038 | /* we remove all the TBs in the range [start, end[ */ |
| 1039 | /* XXX: see if in some cases it could be faster to invalidate all |
| 1040 | the code */ |
| 1041 | tb = p->first_tb; |
| 1042 | while (tb != NULL) { |
| 1043 | n = (uintptr_t)tb & 3; |
| 1044 | tb = (TranslationBlock *)((uintptr_t)tb & ~3); |
| 1045 | tb_next = tb->page_next[n]; |
| 1046 | /* NOTE: this is subtle as a TB may span two physical pages */ |
| 1047 | if (n == 0) { |
| 1048 | /* NOTE: tb_end may be after the end of the page, but |
| 1049 | it is not a problem */ |
| 1050 | tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); |
| 1051 | tb_end = tb_start + tb->size; |
| 1052 | } else { |
| 1053 | tb_start = tb->page_addr[1]; |
| 1054 | tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 1055 | } |
| 1056 | if (!(tb_end <= start || tb_start >= end)) { |
| 1057 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1058 | if (current_tb_not_found) { |
| 1059 | current_tb_not_found = 0; |
| 1060 | current_tb = NULL; |
| 1061 | if (env->mem_io_pc) { |
| 1062 | /* now we have a real cpu fault */ |
| 1063 | current_tb = tb_find_pc(env->mem_io_pc); |
| 1064 | } |
| 1065 | } |
| 1066 | if (current_tb == tb && |
| 1067 | (current_tb->cflags & CF_COUNT_MASK) != 1) { |
| 1068 | /* If we are modifying the current TB, we must stop |
| 1069 | its execution. We could be more precise by checking |
| 1070 | that the modification is after the current PC, but it |
| 1071 | would require a specialized function to partially |
| 1072 | restore the CPU state */ |
| 1073 | |
| 1074 | current_tb_modified = 1; |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 1075 | cpu_restore_state_from_tb(current_tb, env, env->mem_io_pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1076 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
| 1077 | ¤t_flags); |
| 1078 | } |
| 1079 | #endif /* TARGET_HAS_PRECISE_SMC */ |
| 1080 | /* we need to do that to handle the case where a signal |
| 1081 | occurs while doing tb_phys_invalidate() */ |
| 1082 | saved_tb = NULL; |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1083 | if (cpu != NULL) { |
| 1084 | saved_tb = cpu->current_tb; |
| 1085 | cpu->current_tb = NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1086 | } |
| 1087 | tb_phys_invalidate(tb, -1); |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1088 | if (cpu != NULL) { |
| 1089 | cpu->current_tb = saved_tb; |
Andreas Färber | c3affe5 | 2013-01-18 15:03:43 +0100 | [diff] [blame] | 1090 | if (cpu->interrupt_request && cpu->current_tb) { |
| 1091 | cpu_interrupt(cpu, cpu->interrupt_request); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1092 | } |
| 1093 | } |
| 1094 | } |
| 1095 | tb = tb_next; |
| 1096 | } |
| 1097 | #if !defined(CONFIG_USER_ONLY) |
| 1098 | /* if no code remaining, no need to continue to use slow writes */ |
| 1099 | if (!p->first_tb) { |
| 1100 | invalidate_page_bitmap(p); |
| 1101 | if (is_cpu_write_access) { |
| 1102 | tlb_unprotect_code_phys(env, start, env->mem_io_vaddr); |
| 1103 | } |
| 1104 | } |
| 1105 | #endif |
| 1106 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1107 | if (current_tb_modified) { |
| 1108 | /* we generate a block containing just the instruction |
| 1109 | modifying the memory. It will ensure that it cannot modify |
| 1110 | itself */ |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1111 | cpu->current_tb = NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1112 | tb_gen_code(env, current_pc, current_cs_base, current_flags, 1); |
| 1113 | cpu_resume_from_signal(env, NULL); |
| 1114 | } |
| 1115 | #endif |
| 1116 | } |
| 1117 | |
| 1118 | /* len must be <= 8 and start must be a multiple of len */ |
| 1119 | void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len) |
| 1120 | { |
| 1121 | PageDesc *p; |
| 1122 | int offset, b; |
| 1123 | |
| 1124 | #if 0 |
| 1125 | if (1) { |
| 1126 | qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n", |
| 1127 | cpu_single_env->mem_io_vaddr, len, |
| 1128 | cpu_single_env->eip, |
| 1129 | cpu_single_env->eip + |
| 1130 | (intptr_t)cpu_single_env->segs[R_CS].base); |
| 1131 | } |
| 1132 | #endif |
| 1133 | p = page_find(start >> TARGET_PAGE_BITS); |
| 1134 | if (!p) { |
| 1135 | return; |
| 1136 | } |
| 1137 | if (p->code_bitmap) { |
| 1138 | offset = start & ~TARGET_PAGE_MASK; |
| 1139 | b = p->code_bitmap[offset >> 3] >> (offset & 7); |
| 1140 | if (b & ((1 << len) - 1)) { |
| 1141 | goto do_invalidate; |
| 1142 | } |
| 1143 | } else { |
| 1144 | do_invalidate: |
| 1145 | tb_invalidate_phys_page_range(start, start + len, 1); |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | #if !defined(CONFIG_SOFTMMU) |
| 1150 | static void tb_invalidate_phys_page(tb_page_addr_t addr, |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1151 | uintptr_t pc, void *puc, |
| 1152 | bool locked) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1153 | { |
| 1154 | TranslationBlock *tb; |
| 1155 | PageDesc *p; |
| 1156 | int n; |
| 1157 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1158 | TranslationBlock *current_tb = NULL; |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1159 | CPUState *cpu = current_cpu; |
| 1160 | CPUArchState *env = NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1161 | int current_tb_modified = 0; |
| 1162 | target_ulong current_pc = 0; |
| 1163 | target_ulong current_cs_base = 0; |
| 1164 | int current_flags = 0; |
| 1165 | #endif |
| 1166 | |
| 1167 | addr &= TARGET_PAGE_MASK; |
| 1168 | p = page_find(addr >> TARGET_PAGE_BITS); |
| 1169 | if (!p) { |
| 1170 | return; |
| 1171 | } |
| 1172 | tb = p->first_tb; |
| 1173 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1174 | if (tb && pc != 0) { |
| 1175 | current_tb = tb_find_pc(pc); |
| 1176 | } |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1177 | if (cpu != NULL) { |
| 1178 | env = cpu->env_ptr; |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1179 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1180 | #endif |
| 1181 | while (tb != NULL) { |
| 1182 | n = (uintptr_t)tb & 3; |
| 1183 | tb = (TranslationBlock *)((uintptr_t)tb & ~3); |
| 1184 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1185 | if (current_tb == tb && |
| 1186 | (current_tb->cflags & CF_COUNT_MASK) != 1) { |
| 1187 | /* If we are modifying the current TB, we must stop |
| 1188 | its execution. We could be more precise by checking |
| 1189 | that the modification is after the current PC, but it |
| 1190 | would require a specialized function to partially |
| 1191 | restore the CPU state */ |
| 1192 | |
| 1193 | current_tb_modified = 1; |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 1194 | cpu_restore_state_from_tb(current_tb, env, pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1195 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
| 1196 | ¤t_flags); |
| 1197 | } |
| 1198 | #endif /* TARGET_HAS_PRECISE_SMC */ |
| 1199 | tb_phys_invalidate(tb, addr); |
| 1200 | tb = tb->page_next[n]; |
| 1201 | } |
| 1202 | p->first_tb = NULL; |
| 1203 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1204 | if (current_tb_modified) { |
| 1205 | /* we generate a block containing just the instruction |
| 1206 | modifying the memory. It will ensure that it cannot modify |
| 1207 | itself */ |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1208 | cpu->current_tb = NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1209 | tb_gen_code(env, current_pc, current_cs_base, current_flags, 1); |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1210 | if (locked) { |
| 1211 | mmap_unlock(); |
| 1212 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1213 | cpu_resume_from_signal(env, puc); |
| 1214 | } |
| 1215 | #endif |
| 1216 | } |
| 1217 | #endif |
| 1218 | |
| 1219 | /* add the tb in the target page and protect it if necessary */ |
| 1220 | static inline void tb_alloc_page(TranslationBlock *tb, |
| 1221 | unsigned int n, tb_page_addr_t page_addr) |
| 1222 | { |
| 1223 | PageDesc *p; |
| 1224 | #ifndef CONFIG_USER_ONLY |
| 1225 | bool page_already_protected; |
| 1226 | #endif |
| 1227 | |
| 1228 | tb->page_addr[n] = page_addr; |
| 1229 | p = page_find_alloc(page_addr >> TARGET_PAGE_BITS, 1); |
| 1230 | tb->page_next[n] = p->first_tb; |
| 1231 | #ifndef CONFIG_USER_ONLY |
| 1232 | page_already_protected = p->first_tb != NULL; |
| 1233 | #endif |
| 1234 | p->first_tb = (TranslationBlock *)((uintptr_t)tb | n); |
| 1235 | invalidate_page_bitmap(p); |
| 1236 | |
| 1237 | #if defined(TARGET_HAS_SMC) || 1 |
| 1238 | |
| 1239 | #if defined(CONFIG_USER_ONLY) |
| 1240 | if (p->flags & PAGE_WRITE) { |
| 1241 | target_ulong addr; |
| 1242 | PageDesc *p2; |
| 1243 | int prot; |
| 1244 | |
| 1245 | /* force the host page as non writable (writes will have a |
| 1246 | page fault + mprotect overhead) */ |
| 1247 | page_addr &= qemu_host_page_mask; |
| 1248 | prot = 0; |
| 1249 | for (addr = page_addr; addr < page_addr + qemu_host_page_size; |
| 1250 | addr += TARGET_PAGE_SIZE) { |
| 1251 | |
| 1252 | p2 = page_find(addr >> TARGET_PAGE_BITS); |
| 1253 | if (!p2) { |
| 1254 | continue; |
| 1255 | } |
| 1256 | prot |= p2->flags; |
| 1257 | p2->flags &= ~PAGE_WRITE; |
| 1258 | } |
| 1259 | mprotect(g2h(page_addr), qemu_host_page_size, |
| 1260 | (prot & PAGE_BITS) & ~PAGE_WRITE); |
| 1261 | #ifdef DEBUG_TB_INVALIDATE |
| 1262 | printf("protecting code page: 0x" TARGET_FMT_lx "\n", |
| 1263 | page_addr); |
| 1264 | #endif |
| 1265 | } |
| 1266 | #else |
| 1267 | /* if some code is already present, then the pages are already |
| 1268 | protected. So we handle the case where only the first TB is |
| 1269 | allocated in a physical page */ |
| 1270 | if (!page_already_protected) { |
| 1271 | tlb_protect_code(page_addr); |
| 1272 | } |
| 1273 | #endif |
| 1274 | |
| 1275 | #endif /* TARGET_HAS_SMC */ |
| 1276 | } |
| 1277 | |
| 1278 | /* add a new TB and link it to the physical page tables. phys_page2 is |
| 1279 | (-1) to indicate that only one page contains the TB. */ |
| 1280 | static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc, |
| 1281 | tb_page_addr_t phys_page2) |
| 1282 | { |
| 1283 | unsigned int h; |
| 1284 | TranslationBlock **ptb; |
| 1285 | |
| 1286 | /* Grab the mmap lock to stop another thread invalidating this TB |
| 1287 | before we are done. */ |
| 1288 | mmap_lock(); |
| 1289 | /* add in the physical hash table */ |
| 1290 | h = tb_phys_hash_func(phys_pc); |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1291 | ptb = &tcg_ctx.tb_ctx.tb_phys_hash[h]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1292 | tb->phys_hash_next = *ptb; |
| 1293 | *ptb = tb; |
| 1294 | |
| 1295 | /* add in the page list */ |
| 1296 | tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK); |
| 1297 | if (phys_page2 != -1) { |
| 1298 | tb_alloc_page(tb, 1, phys_page2); |
| 1299 | } else { |
| 1300 | tb->page_addr[1] = -1; |
| 1301 | } |
| 1302 | |
| 1303 | tb->jmp_first = (TranslationBlock *)((uintptr_t)tb | 2); |
| 1304 | tb->jmp_next[0] = NULL; |
| 1305 | tb->jmp_next[1] = NULL; |
| 1306 | |
| 1307 | /* init original jump addresses */ |
| 1308 | if (tb->tb_next_offset[0] != 0xffff) { |
| 1309 | tb_reset_jump(tb, 0); |
| 1310 | } |
| 1311 | if (tb->tb_next_offset[1] != 0xffff) { |
| 1312 | tb_reset_jump(tb, 1); |
| 1313 | } |
| 1314 | |
| 1315 | #ifdef DEBUG_TB_CHECK |
| 1316 | tb_page_check(); |
| 1317 | #endif |
| 1318 | mmap_unlock(); |
| 1319 | } |
| 1320 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1321 | /* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr < |
| 1322 | tb[1].tc_ptr. Return NULL if not found */ |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 1323 | static TranslationBlock *tb_find_pc(uintptr_t tc_ptr) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1324 | { |
| 1325 | int m_min, m_max, m; |
| 1326 | uintptr_t v; |
| 1327 | TranslationBlock *tb; |
| 1328 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1329 | if (tcg_ctx.tb_ctx.nb_tbs <= 0) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1330 | return NULL; |
| 1331 | } |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 1332 | if (tc_ptr < (uintptr_t)tcg_ctx.code_gen_buffer || |
| 1333 | tc_ptr >= (uintptr_t)tcg_ctx.code_gen_ptr) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1334 | return NULL; |
| 1335 | } |
| 1336 | /* binary search (cf Knuth) */ |
| 1337 | m_min = 0; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1338 | m_max = tcg_ctx.tb_ctx.nb_tbs - 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1339 | while (m_min <= m_max) { |
| 1340 | m = (m_min + m_max) >> 1; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1341 | tb = &tcg_ctx.tb_ctx.tbs[m]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1342 | v = (uintptr_t)tb->tc_ptr; |
| 1343 | if (v == tc_ptr) { |
| 1344 | return tb; |
| 1345 | } else if (tc_ptr < v) { |
| 1346 | m_max = m - 1; |
| 1347 | } else { |
| 1348 | m_min = m + 1; |
| 1349 | } |
| 1350 | } |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1351 | return &tcg_ctx.tb_ctx.tbs[m_max]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1352 | } |
| 1353 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1354 | #if defined(TARGET_HAS_ICE) && !defined(CONFIG_USER_ONLY) |
| 1355 | void tb_invalidate_phys_addr(hwaddr addr) |
| 1356 | { |
| 1357 | ram_addr_t ram_addr; |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 1358 | MemoryRegion *mr; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1359 | hwaddr l = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1360 | |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 1361 | mr = address_space_translate(&address_space_memory, addr, &addr, &l, false); |
| 1362 | if (!(memory_region_is_ram(mr) |
| 1363 | || memory_region_is_romd(mr))) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1364 | return; |
| 1365 | } |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 1366 | ram_addr = (memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK) |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1367 | + addr; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1368 | tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0); |
| 1369 | } |
| 1370 | #endif /* TARGET_HAS_ICE && !defined(CONFIG_USER_ONLY) */ |
| 1371 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1372 | void tb_check_watchpoint(CPUArchState *env) |
| 1373 | { |
| 1374 | TranslationBlock *tb; |
| 1375 | |
| 1376 | tb = tb_find_pc(env->mem_io_pc); |
| 1377 | if (!tb) { |
| 1378 | cpu_abort(env, "check_watchpoint: could not find TB for pc=%p", |
| 1379 | (void *)env->mem_io_pc); |
| 1380 | } |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 1381 | cpu_restore_state_from_tb(tb, env, env->mem_io_pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1382 | tb_phys_invalidate(tb, -1); |
| 1383 | } |
| 1384 | |
| 1385 | #ifndef CONFIG_USER_ONLY |
| 1386 | /* mask must never be zero, except for A20 change call */ |
Andreas Färber | c3affe5 | 2013-01-18 15:03:43 +0100 | [diff] [blame] | 1387 | static void tcg_handle_interrupt(CPUState *cpu, int mask) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1388 | { |
Andreas Färber | c3affe5 | 2013-01-18 15:03:43 +0100 | [diff] [blame] | 1389 | CPUArchState *env = cpu->env_ptr; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1390 | int old_mask; |
| 1391 | |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 1392 | old_mask = cpu->interrupt_request; |
| 1393 | cpu->interrupt_request |= mask; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1394 | |
| 1395 | /* |
| 1396 | * If called from iothread context, wake the target cpu in |
| 1397 | * case its halted. |
| 1398 | */ |
| 1399 | if (!qemu_cpu_is_self(cpu)) { |
| 1400 | qemu_cpu_kick(cpu); |
| 1401 | return; |
| 1402 | } |
| 1403 | |
| 1404 | if (use_icount) { |
| 1405 | env->icount_decr.u16.high = 0xffff; |
| 1406 | if (!can_do_io(env) |
| 1407 | && (mask & ~old_mask) != 0) { |
| 1408 | cpu_abort(env, "Raised interrupt while not in I/O function"); |
| 1409 | } |
| 1410 | } else { |
Peter Maydell | 378df4b | 2013-02-22 18:10:03 +0000 | [diff] [blame] | 1411 | cpu->tcg_exit_req = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1412 | } |
| 1413 | } |
| 1414 | |
| 1415 | CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt; |
| 1416 | |
| 1417 | /* in deterministic execution mode, instructions doing device I/Os |
| 1418 | must be at the end of the TB */ |
| 1419 | void cpu_io_recompile(CPUArchState *env, uintptr_t retaddr) |
| 1420 | { |
| 1421 | TranslationBlock *tb; |
| 1422 | uint32_t n, cflags; |
| 1423 | target_ulong pc, cs_base; |
| 1424 | uint64_t flags; |
| 1425 | |
| 1426 | tb = tb_find_pc(retaddr); |
| 1427 | if (!tb) { |
| 1428 | cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p", |
| 1429 | (void *)retaddr); |
| 1430 | } |
| 1431 | n = env->icount_decr.u16.low + tb->icount; |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 1432 | cpu_restore_state_from_tb(tb, env, retaddr); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1433 | /* Calculate how many instructions had been executed before the fault |
| 1434 | occurred. */ |
| 1435 | n = n - env->icount_decr.u16.low; |
| 1436 | /* Generate a new TB ending on the I/O insn. */ |
| 1437 | n++; |
| 1438 | /* On MIPS and SH, delay slot instructions can only be restarted if |
| 1439 | they were already the first instruction in the TB. If this is not |
| 1440 | the first instruction in a TB then re-execute the preceding |
| 1441 | branch. */ |
| 1442 | #if defined(TARGET_MIPS) |
| 1443 | if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) { |
| 1444 | env->active_tc.PC -= 4; |
| 1445 | env->icount_decr.u16.low++; |
| 1446 | env->hflags &= ~MIPS_HFLAG_BMASK; |
| 1447 | } |
| 1448 | #elif defined(TARGET_SH4) |
| 1449 | if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0 |
| 1450 | && n > 1) { |
| 1451 | env->pc -= 2; |
| 1452 | env->icount_decr.u16.low++; |
| 1453 | env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL); |
| 1454 | } |
| 1455 | #endif |
| 1456 | /* This should never happen. */ |
| 1457 | if (n > CF_COUNT_MASK) { |
| 1458 | cpu_abort(env, "TB too big during recompile"); |
| 1459 | } |
| 1460 | |
| 1461 | cflags = n | CF_LAST_IO; |
| 1462 | pc = tb->pc; |
| 1463 | cs_base = tb->cs_base; |
| 1464 | flags = tb->flags; |
| 1465 | tb_phys_invalidate(tb, -1); |
| 1466 | /* FIXME: In theory this could raise an exception. In practice |
| 1467 | we have already translated the block once so it's probably ok. */ |
| 1468 | tb_gen_code(env, pc, cs_base, flags, cflags); |
| 1469 | /* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not |
| 1470 | the first in the TB) then we end up generating a whole new TB and |
| 1471 | repeating the fault, which is horribly inefficient. |
| 1472 | Better would be to execute just this insn uncached, or generate a |
| 1473 | second new TB. */ |
| 1474 | cpu_resume_from_signal(env, NULL); |
| 1475 | } |
| 1476 | |
| 1477 | void tb_flush_jmp_cache(CPUArchState *env, target_ulong addr) |
| 1478 | { |
| 1479 | unsigned int i; |
| 1480 | |
| 1481 | /* Discard jump cache entries for any tb which might potentially |
| 1482 | overlap the flushed page. */ |
| 1483 | i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE); |
| 1484 | memset(&env->tb_jmp_cache[i], 0, |
| 1485 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); |
| 1486 | |
| 1487 | i = tb_jmp_cache_hash_page(addr); |
| 1488 | memset(&env->tb_jmp_cache[i], 0, |
| 1489 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); |
| 1490 | } |
| 1491 | |
| 1492 | void dump_exec_info(FILE *f, fprintf_function cpu_fprintf) |
| 1493 | { |
| 1494 | int i, target_code_size, max_target_code_size; |
| 1495 | int direct_jmp_count, direct_jmp2_count, cross_page; |
| 1496 | TranslationBlock *tb; |
| 1497 | |
| 1498 | target_code_size = 0; |
| 1499 | max_target_code_size = 0; |
| 1500 | cross_page = 0; |
| 1501 | direct_jmp_count = 0; |
| 1502 | direct_jmp2_count = 0; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1503 | for (i = 0; i < tcg_ctx.tb_ctx.nb_tbs; i++) { |
| 1504 | tb = &tcg_ctx.tb_ctx.tbs[i]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1505 | target_code_size += tb->size; |
| 1506 | if (tb->size > max_target_code_size) { |
| 1507 | max_target_code_size = tb->size; |
| 1508 | } |
| 1509 | if (tb->page_addr[1] != -1) { |
| 1510 | cross_page++; |
| 1511 | } |
| 1512 | if (tb->tb_next_offset[0] != 0xffff) { |
| 1513 | direct_jmp_count++; |
| 1514 | if (tb->tb_next_offset[1] != 0xffff) { |
| 1515 | direct_jmp2_count++; |
| 1516 | } |
| 1517 | } |
| 1518 | } |
| 1519 | /* XXX: avoid using doubles ? */ |
| 1520 | cpu_fprintf(f, "Translation buffer state:\n"); |
| 1521 | cpu_fprintf(f, "gen code size %td/%zd\n", |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 1522 | tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer, |
| 1523 | tcg_ctx.code_gen_buffer_max_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1524 | cpu_fprintf(f, "TB count %d/%d\n", |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1525 | tcg_ctx.tb_ctx.nb_tbs, tcg_ctx.code_gen_max_blocks); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1526 | cpu_fprintf(f, "TB avg target size %d max=%d bytes\n", |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1527 | tcg_ctx.tb_ctx.nb_tbs ? target_code_size / |
| 1528 | tcg_ctx.tb_ctx.nb_tbs : 0, |
| 1529 | max_target_code_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1530 | cpu_fprintf(f, "TB avg host size %td bytes (expansion ratio: %0.1f)\n", |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1531 | tcg_ctx.tb_ctx.nb_tbs ? (tcg_ctx.code_gen_ptr - |
| 1532 | tcg_ctx.code_gen_buffer) / |
| 1533 | tcg_ctx.tb_ctx.nb_tbs : 0, |
| 1534 | target_code_size ? (double) (tcg_ctx.code_gen_ptr - |
| 1535 | tcg_ctx.code_gen_buffer) / |
| 1536 | target_code_size : 0); |
| 1537 | cpu_fprintf(f, "cross page TB count %d (%d%%)\n", cross_page, |
| 1538 | tcg_ctx.tb_ctx.nb_tbs ? (cross_page * 100) / |
| 1539 | tcg_ctx.tb_ctx.nb_tbs : 0); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1540 | cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n", |
| 1541 | direct_jmp_count, |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1542 | tcg_ctx.tb_ctx.nb_tbs ? (direct_jmp_count * 100) / |
| 1543 | tcg_ctx.tb_ctx.nb_tbs : 0, |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1544 | direct_jmp2_count, |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1545 | tcg_ctx.tb_ctx.nb_tbs ? (direct_jmp2_count * 100) / |
| 1546 | tcg_ctx.tb_ctx.nb_tbs : 0); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1547 | cpu_fprintf(f, "\nStatistics:\n"); |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1548 | cpu_fprintf(f, "TB flush count %d\n", tcg_ctx.tb_ctx.tb_flush_count); |
| 1549 | cpu_fprintf(f, "TB invalidate count %d\n", |
| 1550 | tcg_ctx.tb_ctx.tb_phys_invalidate_count); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1551 | cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count); |
| 1552 | tcg_dump_info(f, cpu_fprintf); |
| 1553 | } |
| 1554 | |
| 1555 | #else /* CONFIG_USER_ONLY */ |
| 1556 | |
Andreas Färber | c3affe5 | 2013-01-18 15:03:43 +0100 | [diff] [blame] | 1557 | void cpu_interrupt(CPUState *cpu, int mask) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1558 | { |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 1559 | cpu->interrupt_request |= mask; |
Peter Maydell | 378df4b | 2013-02-22 18:10:03 +0000 | [diff] [blame] | 1560 | cpu->tcg_exit_req = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1561 | } |
| 1562 | |
| 1563 | /* |
| 1564 | * Walks guest process memory "regions" one by one |
| 1565 | * and calls callback function 'fn' for each region. |
| 1566 | */ |
| 1567 | struct walk_memory_regions_data { |
| 1568 | walk_memory_regions_fn fn; |
| 1569 | void *priv; |
| 1570 | uintptr_t start; |
| 1571 | int prot; |
| 1572 | }; |
| 1573 | |
| 1574 | static int walk_memory_regions_end(struct walk_memory_regions_data *data, |
| 1575 | abi_ulong end, int new_prot) |
| 1576 | { |
| 1577 | if (data->start != -1ul) { |
| 1578 | int rc = data->fn(data->priv, data->start, end, data->prot); |
| 1579 | if (rc != 0) { |
| 1580 | return rc; |
| 1581 | } |
| 1582 | } |
| 1583 | |
| 1584 | data->start = (new_prot ? end : -1ul); |
| 1585 | data->prot = new_prot; |
| 1586 | |
| 1587 | return 0; |
| 1588 | } |
| 1589 | |
| 1590 | static int walk_memory_regions_1(struct walk_memory_regions_data *data, |
| 1591 | abi_ulong base, int level, void **lp) |
| 1592 | { |
| 1593 | abi_ulong pa; |
| 1594 | int i, rc; |
| 1595 | |
| 1596 | if (*lp == NULL) { |
| 1597 | return walk_memory_regions_end(data, base, 0); |
| 1598 | } |
| 1599 | |
| 1600 | if (level == 0) { |
| 1601 | PageDesc *pd = *lp; |
| 1602 | |
| 1603 | for (i = 0; i < L2_SIZE; ++i) { |
| 1604 | int prot = pd[i].flags; |
| 1605 | |
| 1606 | pa = base | (i << TARGET_PAGE_BITS); |
| 1607 | if (prot != data->prot) { |
| 1608 | rc = walk_memory_regions_end(data, pa, prot); |
| 1609 | if (rc != 0) { |
| 1610 | return rc; |
| 1611 | } |
| 1612 | } |
| 1613 | } |
| 1614 | } else { |
| 1615 | void **pp = *lp; |
| 1616 | |
| 1617 | for (i = 0; i < L2_SIZE; ++i) { |
| 1618 | pa = base | ((abi_ulong)i << |
| 1619 | (TARGET_PAGE_BITS + L2_BITS * level)); |
| 1620 | rc = walk_memory_regions_1(data, pa, level - 1, pp + i); |
| 1621 | if (rc != 0) { |
| 1622 | return rc; |
| 1623 | } |
| 1624 | } |
| 1625 | } |
| 1626 | |
| 1627 | return 0; |
| 1628 | } |
| 1629 | |
| 1630 | int walk_memory_regions(void *priv, walk_memory_regions_fn fn) |
| 1631 | { |
| 1632 | struct walk_memory_regions_data data; |
| 1633 | uintptr_t i; |
| 1634 | |
| 1635 | data.fn = fn; |
| 1636 | data.priv = priv; |
| 1637 | data.start = -1ul; |
| 1638 | data.prot = 0; |
| 1639 | |
| 1640 | for (i = 0; i < V_L1_SIZE; i++) { |
| 1641 | int rc = walk_memory_regions_1(&data, (abi_ulong)i << V_L1_SHIFT, |
| 1642 | V_L1_SHIFT / L2_BITS - 1, l1_map + i); |
| 1643 | |
| 1644 | if (rc != 0) { |
| 1645 | return rc; |
| 1646 | } |
| 1647 | } |
| 1648 | |
| 1649 | return walk_memory_regions_end(&data, 0, 0); |
| 1650 | } |
| 1651 | |
| 1652 | static int dump_region(void *priv, abi_ulong start, |
| 1653 | abi_ulong end, unsigned long prot) |
| 1654 | { |
| 1655 | FILE *f = (FILE *)priv; |
| 1656 | |
| 1657 | (void) fprintf(f, TARGET_ABI_FMT_lx"-"TARGET_ABI_FMT_lx |
| 1658 | " "TARGET_ABI_FMT_lx" %c%c%c\n", |
| 1659 | start, end, end - start, |
| 1660 | ((prot & PAGE_READ) ? 'r' : '-'), |
| 1661 | ((prot & PAGE_WRITE) ? 'w' : '-'), |
| 1662 | ((prot & PAGE_EXEC) ? 'x' : '-')); |
| 1663 | |
| 1664 | return 0; |
| 1665 | } |
| 1666 | |
| 1667 | /* dump memory mappings */ |
| 1668 | void page_dump(FILE *f) |
| 1669 | { |
Stefan Weil | 227b817 | 2013-09-12 20:09:06 +0200 | [diff] [blame] | 1670 | const int length = sizeof(abi_ulong) * 2; |
| 1671 | (void) fprintf(f, "%-*s %-*s %-*s %s\n", |
| 1672 | length, "start", length, "end", length, "size", "prot"); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1673 | walk_memory_regions(f, dump_region); |
| 1674 | } |
| 1675 | |
| 1676 | int page_get_flags(target_ulong address) |
| 1677 | { |
| 1678 | PageDesc *p; |
| 1679 | |
| 1680 | p = page_find(address >> TARGET_PAGE_BITS); |
| 1681 | if (!p) { |
| 1682 | return 0; |
| 1683 | } |
| 1684 | return p->flags; |
| 1685 | } |
| 1686 | |
| 1687 | /* Modify the flags of a page and invalidate the code if necessary. |
| 1688 | The flag PAGE_WRITE_ORG is positioned automatically depending |
| 1689 | on PAGE_WRITE. The mmap_lock should already be held. */ |
| 1690 | void page_set_flags(target_ulong start, target_ulong end, int flags) |
| 1691 | { |
| 1692 | target_ulong addr, len; |
| 1693 | |
| 1694 | /* This function should never be called with addresses outside the |
| 1695 | guest address space. If this assert fires, it probably indicates |
| 1696 | a missing call to h2g_valid. */ |
| 1697 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS |
| 1698 | assert(end < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); |
| 1699 | #endif |
| 1700 | assert(start < end); |
| 1701 | |
| 1702 | start = start & TARGET_PAGE_MASK; |
| 1703 | end = TARGET_PAGE_ALIGN(end); |
| 1704 | |
| 1705 | if (flags & PAGE_WRITE) { |
| 1706 | flags |= PAGE_WRITE_ORG; |
| 1707 | } |
| 1708 | |
| 1709 | for (addr = start, len = end - start; |
| 1710 | len != 0; |
| 1711 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
| 1712 | PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1); |
| 1713 | |
| 1714 | /* If the write protection bit is set, then we invalidate |
| 1715 | the code inside. */ |
| 1716 | if (!(p->flags & PAGE_WRITE) && |
| 1717 | (flags & PAGE_WRITE) && |
| 1718 | p->first_tb) { |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1719 | tb_invalidate_phys_page(addr, 0, NULL, false); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1720 | } |
| 1721 | p->flags = flags; |
| 1722 | } |
| 1723 | } |
| 1724 | |
| 1725 | int page_check_range(target_ulong start, target_ulong len, int flags) |
| 1726 | { |
| 1727 | PageDesc *p; |
| 1728 | target_ulong end; |
| 1729 | target_ulong addr; |
| 1730 | |
| 1731 | /* This function should never be called with addresses outside the |
| 1732 | guest address space. If this assert fires, it probably indicates |
| 1733 | a missing call to h2g_valid. */ |
| 1734 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS |
| 1735 | assert(start < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); |
| 1736 | #endif |
| 1737 | |
| 1738 | if (len == 0) { |
| 1739 | return 0; |
| 1740 | } |
| 1741 | if (start + len - 1 < start) { |
| 1742 | /* We've wrapped around. */ |
| 1743 | return -1; |
| 1744 | } |
| 1745 | |
| 1746 | /* must do before we loose bits in the next step */ |
| 1747 | end = TARGET_PAGE_ALIGN(start + len); |
| 1748 | start = start & TARGET_PAGE_MASK; |
| 1749 | |
| 1750 | for (addr = start, len = end - start; |
| 1751 | len != 0; |
| 1752 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
| 1753 | p = page_find(addr >> TARGET_PAGE_BITS); |
| 1754 | if (!p) { |
| 1755 | return -1; |
| 1756 | } |
| 1757 | if (!(p->flags & PAGE_VALID)) { |
| 1758 | return -1; |
| 1759 | } |
| 1760 | |
| 1761 | if ((flags & PAGE_READ) && !(p->flags & PAGE_READ)) { |
| 1762 | return -1; |
| 1763 | } |
| 1764 | if (flags & PAGE_WRITE) { |
| 1765 | if (!(p->flags & PAGE_WRITE_ORG)) { |
| 1766 | return -1; |
| 1767 | } |
| 1768 | /* unprotect the page if it was put read-only because it |
| 1769 | contains translated code */ |
| 1770 | if (!(p->flags & PAGE_WRITE)) { |
| 1771 | if (!page_unprotect(addr, 0, NULL)) { |
| 1772 | return -1; |
| 1773 | } |
| 1774 | } |
| 1775 | return 0; |
| 1776 | } |
| 1777 | } |
| 1778 | return 0; |
| 1779 | } |
| 1780 | |
| 1781 | /* called from signal handler: invalidate the code and unprotect the |
| 1782 | page. Return TRUE if the fault was successfully handled. */ |
| 1783 | int page_unprotect(target_ulong address, uintptr_t pc, void *puc) |
| 1784 | { |
| 1785 | unsigned int prot; |
| 1786 | PageDesc *p; |
| 1787 | target_ulong host_start, host_end, addr; |
| 1788 | |
| 1789 | /* Technically this isn't safe inside a signal handler. However we |
| 1790 | know this only ever happens in a synchronous SEGV handler, so in |
| 1791 | practice it seems to be ok. */ |
| 1792 | mmap_lock(); |
| 1793 | |
| 1794 | p = page_find(address >> TARGET_PAGE_BITS); |
| 1795 | if (!p) { |
| 1796 | mmap_unlock(); |
| 1797 | return 0; |
| 1798 | } |
| 1799 | |
| 1800 | /* if the page was really writable, then we change its |
| 1801 | protection back to writable */ |
| 1802 | if ((p->flags & PAGE_WRITE_ORG) && !(p->flags & PAGE_WRITE)) { |
| 1803 | host_start = address & qemu_host_page_mask; |
| 1804 | host_end = host_start + qemu_host_page_size; |
| 1805 | |
| 1806 | prot = 0; |
| 1807 | for (addr = host_start ; addr < host_end ; addr += TARGET_PAGE_SIZE) { |
| 1808 | p = page_find(addr >> TARGET_PAGE_BITS); |
| 1809 | p->flags |= PAGE_WRITE; |
| 1810 | prot |= p->flags; |
| 1811 | |
| 1812 | /* and since the content will be modified, we must invalidate |
| 1813 | the corresponding translated code. */ |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1814 | tb_invalidate_phys_page(addr, pc, puc, true); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1815 | #ifdef DEBUG_TB_CHECK |
| 1816 | tb_invalidate_check(addr); |
| 1817 | #endif |
| 1818 | } |
| 1819 | mprotect((void *)g2h(host_start), qemu_host_page_size, |
| 1820 | prot & PAGE_BITS); |
| 1821 | |
| 1822 | mmap_unlock(); |
| 1823 | return 1; |
| 1824 | } |
| 1825 | mmap_unlock(); |
| 1826 | return 0; |
| 1827 | } |
| 1828 | #endif /* CONFIG_USER_ONLY */ |