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" |
Alex Bennée | 6db8b53 | 2014-08-01 17:08:57 +0100 | [diff] [blame] | 36 | #include "trace.h" |
Paolo Bonzini | 76cad71 | 2012-10-24 11:12:21 +0200 | [diff] [blame] | 37 | #include "disas/disas.h" |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 38 | #include "tcg.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 39 | #if defined(CONFIG_USER_ONLY) |
| 40 | #include "qemu.h" |
| 41 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| 42 | #include <sys/param.h> |
| 43 | #if __FreeBSD_version >= 700104 |
| 44 | #define HAVE_KINFO_GETVMMAP |
| 45 | #define sigqueue sigqueue_freebsd /* avoid redefinition */ |
| 46 | #include <sys/time.h> |
| 47 | #include <sys/proc.h> |
| 48 | #include <machine/profile.h> |
| 49 | #define _KERNEL |
| 50 | #include <sys/user.h> |
| 51 | #undef _KERNEL |
| 52 | #undef sigqueue |
| 53 | #include <libutil.h> |
| 54 | #endif |
| 55 | #endif |
Paolo Bonzini | 0bc3cd6 | 2013-04-08 17:29:59 +0200 | [diff] [blame] | 56 | #else |
| 57 | #include "exec/address-spaces.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 58 | #endif |
| 59 | |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 60 | #include "exec/cputlb.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 61 | #include "translate-all.h" |
Alexey Kardashevskiy | 0aa0989 | 2013-04-22 17:42:50 +1000 | [diff] [blame] | 62 | #include "qemu/timer.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 63 | |
| 64 | //#define DEBUG_TB_INVALIDATE |
| 65 | //#define DEBUG_FLUSH |
| 66 | /* make various TB consistency checks */ |
| 67 | //#define DEBUG_TB_CHECK |
| 68 | |
| 69 | #if !defined(CONFIG_USER_ONLY) |
| 70 | /* TB consistency checks only implemented for usermode emulation. */ |
| 71 | #undef DEBUG_TB_CHECK |
| 72 | #endif |
| 73 | |
| 74 | #define SMC_BITMAP_USE_THRESHOLD 10 |
| 75 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 76 | typedef struct PageDesc { |
| 77 | /* list of TBs intersecting this ram page */ |
| 78 | TranslationBlock *first_tb; |
| 79 | /* in order to optimize self modifying code, we count the number |
| 80 | of lookups we do to a given page to use a bitmap */ |
| 81 | unsigned int code_write_count; |
| 82 | uint8_t *code_bitmap; |
| 83 | #if defined(CONFIG_USER_ONLY) |
| 84 | unsigned long flags; |
| 85 | #endif |
| 86 | } PageDesc; |
| 87 | |
| 88 | /* In system mode we want L1_MAP to be based on ram offsets, |
| 89 | while in user mode we want it to be based on virtual addresses. */ |
| 90 | #if !defined(CONFIG_USER_ONLY) |
| 91 | #if HOST_LONG_BITS < TARGET_PHYS_ADDR_SPACE_BITS |
| 92 | # define L1_MAP_ADDR_SPACE_BITS HOST_LONG_BITS |
| 93 | #else |
| 94 | # define L1_MAP_ADDR_SPACE_BITS TARGET_PHYS_ADDR_SPACE_BITS |
| 95 | #endif |
| 96 | #else |
| 97 | # define L1_MAP_ADDR_SPACE_BITS TARGET_VIRT_ADDR_SPACE_BITS |
| 98 | #endif |
| 99 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 100 | /* Size of the L2 (and L3, etc) page tables. */ |
| 101 | #define V_L2_BITS 10 |
| 102 | #define V_L2_SIZE (1 << V_L2_BITS) |
| 103 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 104 | /* The bits remaining after N lower levels of page tables. */ |
| 105 | #define V_L1_BITS_REM \ |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 106 | ((L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS) % V_L2_BITS) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 107 | |
| 108 | #if V_L1_BITS_REM < 4 |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 109 | #define V_L1_BITS (V_L1_BITS_REM + V_L2_BITS) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 110 | #else |
| 111 | #define V_L1_BITS V_L1_BITS_REM |
| 112 | #endif |
| 113 | |
| 114 | #define V_L1_SIZE ((target_ulong)1 << V_L1_BITS) |
| 115 | |
| 116 | #define V_L1_SHIFT (L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS - V_L1_BITS) |
| 117 | |
| 118 | uintptr_t qemu_real_host_page_size; |
| 119 | uintptr_t qemu_host_page_size; |
| 120 | uintptr_t qemu_host_page_mask; |
| 121 | |
| 122 | /* This is a multi-level map on the virtual address space. |
| 123 | The bottom level has pointers to PageDesc. */ |
| 124 | static void *l1_map[V_L1_SIZE]; |
| 125 | |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 126 | /* code generation context */ |
| 127 | TCGContext tcg_ctx; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 128 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 129 | static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc, |
| 130 | tb_page_addr_t phys_page2); |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 131 | static TranslationBlock *tb_find_pc(uintptr_t tc_ptr); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 132 | |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 133 | void cpu_gen_init(void) |
| 134 | { |
| 135 | tcg_context_init(&tcg_ctx); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 136 | } |
| 137 | |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 138 | /* return non zero if the very first instruction is invalid so that |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 139 | the virtual CPU can trigger an exception. |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 140 | |
| 141 | '*gen_code_size_ptr' contains the size of the generated code (host |
| 142 | code). |
| 143 | */ |
Andreas Färber | 9349b4f | 2012-03-14 01:38:32 +0100 | [diff] [blame] | 144 | int cpu_gen_code(CPUArchState *env, TranslationBlock *tb, int *gen_code_size_ptr) |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 145 | { |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 146 | TCGContext *s = &tcg_ctx; |
Richard Henderson | 1813e17 | 2014-03-28 12:56:22 -0700 | [diff] [blame] | 147 | tcg_insn_unit *gen_code_buf; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 148 | int gen_code_size; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 149 | #ifdef CONFIG_PROFILER |
| 150 | int64_t ti; |
| 151 | #endif |
| 152 | |
| 153 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 154 | s->tb_count1++; /* includes aborted translations because of |
| 155 | exceptions */ |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 156 | ti = profile_getclock(); |
| 157 | #endif |
| 158 | tcg_func_start(s); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 159 | |
ths | 2cfc5f1 | 2008-07-18 18:01:29 +0000 | [diff] [blame] | 160 | gen_intermediate_code(env, tb); |
| 161 | |
Alex Bennée | 6db8b53 | 2014-08-01 17:08:57 +0100 | [diff] [blame] | 162 | trace_translate_block(tb, tb->pc, tb->tc_ptr); |
| 163 | |
bellard | ec6338b | 2007-11-08 14:25:03 +0000 | [diff] [blame] | 164 | /* generate machine code */ |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 165 | gen_code_buf = tb->tc_ptr; |
bellard | ec6338b | 2007-11-08 14:25:03 +0000 | [diff] [blame] | 166 | tb->tb_next_offset[0] = 0xffff; |
| 167 | tb->tb_next_offset[1] = 0xffff; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 168 | s->tb_next_offset = tb->tb_next_offset; |
bellard | 4cbb86e | 2003-09-17 22:53:29 +0000 | [diff] [blame] | 169 | #ifdef USE_DIRECT_JUMP |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 170 | s->tb_jmp_offset = tb->tb_jmp_offset; |
| 171 | s->tb_next = NULL; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 172 | #else |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 173 | s->tb_jmp_offset = NULL; |
| 174 | s->tb_next = tb->tb_next; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 175 | #endif |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 176 | |
| 177 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 178 | s->tb_count++; |
| 179 | s->interm_time += profile_getclock() - ti; |
| 180 | s->code_time -= profile_getclock(); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 181 | #endif |
aurel32 | 54604f7 | 2008-12-07 20:35:00 +0000 | [diff] [blame] | 182 | gen_code_size = tcg_gen_code(s, gen_code_buf); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 183 | *gen_code_size_ptr = gen_code_size; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 184 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 185 | s->code_time += profile_getclock(); |
| 186 | s->code_in_len += tb->size; |
| 187 | s->code_out_len += gen_code_size; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 188 | #endif |
| 189 | |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 190 | #ifdef DEBUG_DISAS |
aliguori | 8fec2b8 | 2009-01-15 22:36:53 +0000 | [diff] [blame] | 191 | if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) { |
Richard Henderson | 1813e17 | 2014-03-28 12:56:22 -0700 | [diff] [blame] | 192 | qemu_log("OUT: [size=%d]\n", gen_code_size); |
| 193 | log_disas(tb->tc_ptr, gen_code_size); |
aliguori | 93fcfe3 | 2009-01-15 22:34:14 +0000 | [diff] [blame] | 194 | qemu_log("\n"); |
aliguori | 31b1a7b | 2009-01-15 22:35:09 +0000 | [diff] [blame] | 195 | qemu_log_flush(); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 196 | } |
| 197 | #endif |
| 198 | return 0; |
| 199 | } |
| 200 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 201 | /* The cpu state corresponding to 'searched_pc' is restored. |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 202 | */ |
Andreas Färber | 74f1051 | 2013-09-01 17:02:58 +0200 | [diff] [blame] | 203 | static int cpu_restore_state_from_tb(CPUState *cpu, TranslationBlock *tb, |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 204 | uintptr_t searched_pc) |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 205 | { |
Andreas Färber | 74f1051 | 2013-09-01 17:02:58 +0200 | [diff] [blame] | 206 | CPUArchState *env = cpu->env_ptr; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 207 | TCGContext *s = &tcg_ctx; |
| 208 | int j; |
Stefan Weil | 6375e09 | 2012-04-06 22:26:15 +0200 | [diff] [blame] | 209 | uintptr_t tc_ptr; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 210 | #ifdef CONFIG_PROFILER |
| 211 | int64_t ti; |
| 212 | #endif |
| 213 | |
| 214 | #ifdef CONFIG_PROFILER |
| 215 | ti = profile_getclock(); |
| 216 | #endif |
| 217 | tcg_func_start(s); |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 218 | |
ths | 2cfc5f1 | 2008-07-18 18:01:29 +0000 | [diff] [blame] | 219 | gen_intermediate_code_pc(env, tb); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 220 | |
Paolo Bonzini | bd79255 | 2014-11-26 13:39:59 +0300 | [diff] [blame] | 221 | if (tb->cflags & CF_USE_ICOUNT) { |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 222 | /* Reset the cycle counter to the start of the block. */ |
Andreas Färber | 28ecfd7 | 2013-08-26 05:51:49 +0200 | [diff] [blame] | 223 | cpu->icount_decr.u16.low += tb->icount; |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 224 | /* Clear the IO flag. */ |
Andreas Färber | 99df7dc | 2013-08-26 05:15:23 +0200 | [diff] [blame] | 225 | cpu->can_do_io = 0; |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 226 | } |
| 227 | |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 228 | /* find opc index corresponding to search_pc */ |
Stefan Weil | 6375e09 | 2012-04-06 22:26:15 +0200 | [diff] [blame] | 229 | tc_ptr = (uintptr_t)tb->tc_ptr; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 230 | if (searched_pc < tc_ptr) |
| 231 | return -1; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 232 | |
| 233 | s->tb_next_offset = tb->tb_next_offset; |
| 234 | #ifdef USE_DIRECT_JUMP |
| 235 | s->tb_jmp_offset = tb->tb_jmp_offset; |
| 236 | s->tb_next = NULL; |
| 237 | #else |
| 238 | s->tb_jmp_offset = NULL; |
| 239 | s->tb_next = tb->tb_next; |
| 240 | #endif |
Richard Henderson | 1813e17 | 2014-03-28 12:56:22 -0700 | [diff] [blame] | 241 | j = tcg_gen_code_search_pc(s, (tcg_insn_unit *)tc_ptr, |
| 242 | searched_pc - tc_ptr); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 243 | if (j < 0) |
| 244 | return -1; |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 245 | /* now find start of instruction before */ |
Evgeny Voevodin | ab1103d | 2012-11-21 11:43:06 +0400 | [diff] [blame] | 246 | while (s->gen_opc_instr_start[j] == 0) { |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 247 | j--; |
Evgeny Voevodin | ab1103d | 2012-11-21 11:43:06 +0400 | [diff] [blame] | 248 | } |
Andreas Färber | 28ecfd7 | 2013-08-26 05:51:49 +0200 | [diff] [blame] | 249 | cpu->icount_decr.u16.low -= s->gen_opc_icount[j]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 250 | |
Stefan Weil | e87b7cb | 2011-04-18 06:39:52 +0000 | [diff] [blame] | 251 | restore_state_to_opc(env, tb, j); |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 252 | |
| 253 | #ifdef CONFIG_PROFILER |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 254 | s->restore_time += profile_getclock() - ti; |
| 255 | s->restore_count++; |
bellard | 57fec1f | 2008-02-01 10:50:11 +0000 | [diff] [blame] | 256 | #endif |
bellard | d19893d | 2003-06-15 19:58:51 +0000 | [diff] [blame] | 257 | return 0; |
| 258 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 259 | |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 260 | bool cpu_restore_state(CPUState *cpu, uintptr_t retaddr) |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 261 | { |
| 262 | TranslationBlock *tb; |
| 263 | |
| 264 | tb = tb_find_pc(retaddr); |
| 265 | if (tb) { |
Andreas Färber | 74f1051 | 2013-09-01 17:02:58 +0200 | [diff] [blame] | 266 | cpu_restore_state_from_tb(cpu, tb, retaddr); |
Pavel Dovgalyuk | d8a499f | 2014-11-26 13:40:16 +0300 | [diff] [blame] | 267 | if (tb->cflags & CF_NOCACHE) { |
| 268 | /* one-shot translation, invalidate it immediately */ |
| 269 | cpu->current_tb = NULL; |
| 270 | tb_phys_invalidate(tb, -1); |
| 271 | tb_free(tb); |
| 272 | } |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 273 | return true; |
| 274 | } |
| 275 | return false; |
| 276 | } |
| 277 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 278 | #ifdef _WIN32 |
SeokYeon Hwang | 2d8ac5e | 2014-12-23 22:26:54 +0000 | [diff] [blame] | 279 | static __attribute__((unused)) void map_exec(void *addr, long size) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 280 | { |
| 281 | DWORD old_protect; |
| 282 | VirtualProtect(addr, size, |
| 283 | PAGE_EXECUTE_READWRITE, &old_protect); |
| 284 | } |
| 285 | #else |
SeokYeon Hwang | 2d8ac5e | 2014-12-23 22:26:54 +0000 | [diff] [blame] | 286 | static __attribute__((unused)) void map_exec(void *addr, long size) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 287 | { |
| 288 | unsigned long start, end, page_size; |
| 289 | |
| 290 | page_size = getpagesize(); |
| 291 | start = (unsigned long)addr; |
| 292 | start &= ~(page_size - 1); |
| 293 | |
| 294 | end = (unsigned long)addr + size; |
| 295 | end += page_size - 1; |
| 296 | end &= ~(page_size - 1); |
| 297 | |
| 298 | mprotect((void *)start, end - start, |
| 299 | PROT_READ | PROT_WRITE | PROT_EXEC); |
| 300 | } |
| 301 | #endif |
| 302 | |
Alexey Kardashevskiy | 47c16ed | 2014-01-17 11:12:07 -0700 | [diff] [blame] | 303 | void page_size_init(void) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 304 | { |
| 305 | /* NOTE: we can always suppose that qemu_host_page_size >= |
| 306 | TARGET_PAGE_SIZE */ |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 307 | qemu_real_host_page_size = getpagesize(); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 308 | if (qemu_host_page_size == 0) { |
| 309 | qemu_host_page_size = qemu_real_host_page_size; |
| 310 | } |
| 311 | if (qemu_host_page_size < TARGET_PAGE_SIZE) { |
| 312 | qemu_host_page_size = TARGET_PAGE_SIZE; |
| 313 | } |
| 314 | qemu_host_page_mask = ~(qemu_host_page_size - 1); |
Alexey Kardashevskiy | 47c16ed | 2014-01-17 11:12:07 -0700 | [diff] [blame] | 315 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 316 | |
Alexey Kardashevskiy | 47c16ed | 2014-01-17 11:12:07 -0700 | [diff] [blame] | 317 | static void page_init(void) |
| 318 | { |
| 319 | page_size_init(); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 320 | #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY) |
| 321 | { |
| 322 | #ifdef HAVE_KINFO_GETVMMAP |
| 323 | struct kinfo_vmentry *freep; |
| 324 | int i, cnt; |
| 325 | |
| 326 | freep = kinfo_getvmmap(getpid(), &cnt); |
| 327 | if (freep) { |
| 328 | mmap_lock(); |
| 329 | for (i = 0; i < cnt; i++) { |
| 330 | unsigned long startaddr, endaddr; |
| 331 | |
| 332 | startaddr = freep[i].kve_start; |
| 333 | endaddr = freep[i].kve_end; |
| 334 | if (h2g_valid(startaddr)) { |
| 335 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; |
| 336 | |
| 337 | if (h2g_valid(endaddr)) { |
| 338 | endaddr = h2g(endaddr); |
| 339 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
| 340 | } else { |
| 341 | #if TARGET_ABI_BITS <= L1_MAP_ADDR_SPACE_BITS |
| 342 | endaddr = ~0ul; |
| 343 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
| 344 | #endif |
| 345 | } |
| 346 | } |
| 347 | } |
| 348 | free(freep); |
| 349 | mmap_unlock(); |
| 350 | } |
| 351 | #else |
| 352 | FILE *f; |
| 353 | |
| 354 | last_brk = (unsigned long)sbrk(0); |
| 355 | |
| 356 | f = fopen("/compat/linux/proc/self/maps", "r"); |
| 357 | if (f) { |
| 358 | mmap_lock(); |
| 359 | |
| 360 | do { |
| 361 | unsigned long startaddr, endaddr; |
| 362 | int n; |
| 363 | |
| 364 | n = fscanf(f, "%lx-%lx %*[^\n]\n", &startaddr, &endaddr); |
| 365 | |
| 366 | if (n == 2 && h2g_valid(startaddr)) { |
| 367 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; |
| 368 | |
| 369 | if (h2g_valid(endaddr)) { |
| 370 | endaddr = h2g(endaddr); |
| 371 | } else { |
| 372 | endaddr = ~0ul; |
| 373 | } |
| 374 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
| 375 | } |
| 376 | } while (!feof(f)); |
| 377 | |
| 378 | fclose(f); |
| 379 | mmap_unlock(); |
| 380 | } |
| 381 | #endif |
| 382 | } |
| 383 | #endif |
| 384 | } |
| 385 | |
| 386 | static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) |
| 387 | { |
| 388 | PageDesc *pd; |
| 389 | void **lp; |
| 390 | int i; |
| 391 | |
| 392 | #if defined(CONFIG_USER_ONLY) |
| 393 | /* We can't use g_malloc because it may recurse into a locked mutex. */ |
| 394 | # define ALLOC(P, SIZE) \ |
| 395 | do { \ |
| 396 | P = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, \ |
| 397 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \ |
| 398 | } while (0) |
| 399 | #else |
| 400 | # define ALLOC(P, SIZE) \ |
| 401 | do { P = g_malloc0(SIZE); } while (0) |
| 402 | #endif |
| 403 | |
| 404 | /* Level 1. Always allocated. */ |
| 405 | lp = l1_map + ((index >> V_L1_SHIFT) & (V_L1_SIZE - 1)); |
| 406 | |
| 407 | /* Level 2..N-1. */ |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 408 | for (i = V_L1_SHIFT / V_L2_BITS - 1; i > 0; i--) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 409 | void **p = *lp; |
| 410 | |
| 411 | if (p == NULL) { |
| 412 | if (!alloc) { |
| 413 | return NULL; |
| 414 | } |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 415 | ALLOC(p, sizeof(void *) * V_L2_SIZE); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 416 | *lp = p; |
| 417 | } |
| 418 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 419 | lp = p + ((index >> (i * V_L2_BITS)) & (V_L2_SIZE - 1)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 420 | } |
| 421 | |
| 422 | pd = *lp; |
| 423 | if (pd == NULL) { |
| 424 | if (!alloc) { |
| 425 | return NULL; |
| 426 | } |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 427 | ALLOC(pd, sizeof(PageDesc) * V_L2_SIZE); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 428 | *lp = pd; |
| 429 | } |
| 430 | |
| 431 | #undef ALLOC |
| 432 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 433 | return pd + (index & (V_L2_SIZE - 1)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | static inline PageDesc *page_find(tb_page_addr_t index) |
| 437 | { |
| 438 | return page_find_alloc(index, 0); |
| 439 | } |
| 440 | |
| 441 | #if !defined(CONFIG_USER_ONLY) |
| 442 | #define mmap_lock() do { } while (0) |
| 443 | #define mmap_unlock() do { } while (0) |
| 444 | #endif |
| 445 | |
| 446 | #if defined(CONFIG_USER_ONLY) |
| 447 | /* Currently it is not recommended to allocate big chunks of data in |
| 448 | user mode. It will change when a dedicated libc will be used. */ |
| 449 | /* ??? 64-bit hosts ought to have no problem mmaping data outside the |
| 450 | region in which the guest needs to run. Revisit this. */ |
| 451 | #define USE_STATIC_CODE_GEN_BUFFER |
| 452 | #endif |
| 453 | |
| 454 | /* ??? Should configure for this, not list operating systems here. */ |
| 455 | #if (defined(__linux__) \ |
| 456 | || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \ |
| 457 | || defined(__DragonFly__) || defined(__OpenBSD__) \ |
| 458 | || defined(__NetBSD__)) |
| 459 | # define USE_MMAP |
| 460 | #endif |
| 461 | |
| 462 | /* Minimum size of the code gen buffer. This number is randomly chosen, |
| 463 | but not so small that we can't have a fair number of TB's live. */ |
| 464 | #define MIN_CODE_GEN_BUFFER_SIZE (1024u * 1024) |
| 465 | |
| 466 | /* Maximum size of the code gen buffer we'd like to use. Unless otherwise |
| 467 | indicated, this is constrained by the range of direct branches on the |
| 468 | host cpu, as used by the TCG implementation of goto_tb. */ |
| 469 | #if defined(__x86_64__) |
| 470 | # define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024) |
| 471 | #elif defined(__sparc__) |
| 472 | # define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024) |
Claudio Fontana | 4a136e0 | 2013-06-12 16:20:22 +0100 | [diff] [blame] | 473 | #elif defined(__aarch64__) |
| 474 | # define MAX_CODE_GEN_BUFFER_SIZE (128ul * 1024 * 1024) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 475 | #elif defined(__arm__) |
| 476 | # define MAX_CODE_GEN_BUFFER_SIZE (16u * 1024 * 1024) |
| 477 | #elif defined(__s390x__) |
| 478 | /* We have a +- 4GB range on the branches; leave some slop. */ |
| 479 | # define MAX_CODE_GEN_BUFFER_SIZE (3ul * 1024 * 1024 * 1024) |
Richard Henderson | 479eb12 | 2014-04-24 08:25:03 -0700 | [diff] [blame] | 480 | #elif defined(__mips__) |
| 481 | /* We have a 256MB branch region, but leave room to make sure the |
| 482 | main executable is also within that region. */ |
| 483 | # define MAX_CODE_GEN_BUFFER_SIZE (128ul * 1024 * 1024) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 484 | #else |
| 485 | # define MAX_CODE_GEN_BUFFER_SIZE ((size_t)-1) |
| 486 | #endif |
| 487 | |
| 488 | #define DEFAULT_CODE_GEN_BUFFER_SIZE_1 (32u * 1024 * 1024) |
| 489 | |
| 490 | #define DEFAULT_CODE_GEN_BUFFER_SIZE \ |
| 491 | (DEFAULT_CODE_GEN_BUFFER_SIZE_1 < MAX_CODE_GEN_BUFFER_SIZE \ |
| 492 | ? DEFAULT_CODE_GEN_BUFFER_SIZE_1 : MAX_CODE_GEN_BUFFER_SIZE) |
| 493 | |
| 494 | static inline size_t size_code_gen_buffer(size_t tb_size) |
| 495 | { |
| 496 | /* Size the buffer. */ |
| 497 | if (tb_size == 0) { |
| 498 | #ifdef USE_STATIC_CODE_GEN_BUFFER |
| 499 | tb_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
| 500 | #else |
| 501 | /* ??? Needs adjustments. */ |
| 502 | /* ??? If we relax the requirement that CONFIG_USER_ONLY use the |
| 503 | static buffer, we could size this on RESERVED_VA, on the text |
| 504 | segment size of the executable, or continue to use the default. */ |
| 505 | tb_size = (unsigned long)(ram_size / 4); |
| 506 | #endif |
| 507 | } |
| 508 | if (tb_size < MIN_CODE_GEN_BUFFER_SIZE) { |
| 509 | tb_size = MIN_CODE_GEN_BUFFER_SIZE; |
| 510 | } |
| 511 | if (tb_size > MAX_CODE_GEN_BUFFER_SIZE) { |
| 512 | tb_size = MAX_CODE_GEN_BUFFER_SIZE; |
| 513 | } |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 514 | tcg_ctx.code_gen_buffer_size = tb_size; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 515 | return tb_size; |
| 516 | } |
| 517 | |
Richard Henderson | 483c76e | 2014-04-24 09:16:07 -0700 | [diff] [blame] | 518 | #ifdef __mips__ |
| 519 | /* In order to use J and JAL within the code_gen_buffer, we require |
| 520 | that the buffer not cross a 256MB boundary. */ |
| 521 | static inline bool cross_256mb(void *addr, size_t size) |
| 522 | { |
| 523 | return ((uintptr_t)addr ^ ((uintptr_t)addr + size)) & 0xf0000000; |
| 524 | } |
| 525 | |
| 526 | /* We weren't able to allocate a buffer without crossing that boundary, |
| 527 | so make do with the larger portion of the buffer that doesn't cross. |
| 528 | Returns the new base of the buffer, and adjusts code_gen_buffer_size. */ |
| 529 | static inline void *split_cross_256mb(void *buf1, size_t size1) |
| 530 | { |
| 531 | void *buf2 = (void *)(((uintptr_t)buf1 + size1) & 0xf0000000); |
| 532 | size_t size2 = buf1 + size1 - buf2; |
| 533 | |
| 534 | size1 = buf2 - buf1; |
| 535 | if (size1 < size2) { |
| 536 | size1 = size2; |
| 537 | buf1 = buf2; |
| 538 | } |
| 539 | |
| 540 | tcg_ctx.code_gen_buffer_size = size1; |
| 541 | return buf1; |
| 542 | } |
| 543 | #endif |
| 544 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 545 | #ifdef USE_STATIC_CODE_GEN_BUFFER |
| 546 | static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE] |
| 547 | __attribute__((aligned(CODE_GEN_ALIGN))); |
| 548 | |
| 549 | static inline void *alloc_code_gen_buffer(void) |
| 550 | { |
Richard Henderson | 483c76e | 2014-04-24 09:16:07 -0700 | [diff] [blame] | 551 | void *buf = static_code_gen_buffer; |
| 552 | #ifdef __mips__ |
| 553 | if (cross_256mb(buf, tcg_ctx.code_gen_buffer_size)) { |
| 554 | buf = split_cross_256mb(buf, tcg_ctx.code_gen_buffer_size); |
| 555 | } |
| 556 | #endif |
| 557 | map_exec(buf, tcg_ctx.code_gen_buffer_size); |
| 558 | return buf; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 559 | } |
| 560 | #elif defined(USE_MMAP) |
| 561 | static inline void *alloc_code_gen_buffer(void) |
| 562 | { |
| 563 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
| 564 | uintptr_t start = 0; |
| 565 | void *buf; |
| 566 | |
| 567 | /* Constrain the position of the buffer based on the host cpu. |
| 568 | Note that these addresses are chosen in concert with the |
| 569 | addresses assigned in the relevant linker script file. */ |
| 570 | # if defined(__PIE__) || defined(__PIC__) |
| 571 | /* Don't bother setting a preferred location if we're building |
| 572 | a position-independent executable. We're more likely to get |
| 573 | an address near the main executable if we let the kernel |
| 574 | choose the address. */ |
| 575 | # elif defined(__x86_64__) && defined(MAP_32BIT) |
| 576 | /* Force the memory down into low memory with the executable. |
| 577 | Leave the choice of exact location with the kernel. */ |
| 578 | flags |= MAP_32BIT; |
| 579 | /* Cannot expect to map more than 800MB in low memory. */ |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 580 | if (tcg_ctx.code_gen_buffer_size > 800u * 1024 * 1024) { |
| 581 | tcg_ctx.code_gen_buffer_size = 800u * 1024 * 1024; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 582 | } |
| 583 | # elif defined(__sparc__) |
| 584 | start = 0x40000000ul; |
| 585 | # elif defined(__s390x__) |
| 586 | start = 0x90000000ul; |
Richard Henderson | 479eb12 | 2014-04-24 08:25:03 -0700 | [diff] [blame] | 587 | # elif defined(__mips__) |
| 588 | /* ??? We ought to more explicitly manage layout for softmmu too. */ |
| 589 | # ifdef CONFIG_USER_ONLY |
| 590 | start = 0x68000000ul; |
| 591 | # elif _MIPS_SIM == _ABI64 |
| 592 | start = 0x128000000ul; |
| 593 | # else |
| 594 | start = 0x08000000ul; |
| 595 | # endif |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 596 | # endif |
| 597 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 598 | buf = mmap((void *)start, tcg_ctx.code_gen_buffer_size, |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 599 | PROT_WRITE | PROT_READ | PROT_EXEC, flags, -1, 0); |
Richard Henderson | 483c76e | 2014-04-24 09:16:07 -0700 | [diff] [blame] | 600 | if (buf == MAP_FAILED) { |
| 601 | return NULL; |
| 602 | } |
| 603 | |
| 604 | #ifdef __mips__ |
| 605 | if (cross_256mb(buf, tcg_ctx.code_gen_buffer_size)) { |
Stefan Weil | 5d831be | 2014-06-13 20:42:57 +0200 | [diff] [blame] | 606 | /* Try again, with the original still mapped, to avoid re-acquiring |
Richard Henderson | 483c76e | 2014-04-24 09:16:07 -0700 | [diff] [blame] | 607 | that 256mb crossing. This time don't specify an address. */ |
| 608 | size_t size2, size1 = tcg_ctx.code_gen_buffer_size; |
| 609 | void *buf2 = mmap(NULL, size1, PROT_WRITE | PROT_READ | PROT_EXEC, |
| 610 | flags, -1, 0); |
| 611 | if (buf2 != MAP_FAILED) { |
| 612 | if (!cross_256mb(buf2, size1)) { |
| 613 | /* Success! Use the new buffer. */ |
| 614 | munmap(buf, size1); |
| 615 | return buf2; |
| 616 | } |
| 617 | /* Failure. Work with what we had. */ |
| 618 | munmap(buf2, size1); |
| 619 | } |
| 620 | |
| 621 | /* Split the original buffer. Free the smaller half. */ |
| 622 | buf2 = split_cross_256mb(buf, size1); |
| 623 | size2 = tcg_ctx.code_gen_buffer_size; |
| 624 | munmap(buf + (buf == buf2 ? size2 : 0), size1 - size2); |
| 625 | return buf2; |
| 626 | } |
| 627 | #endif |
| 628 | |
| 629 | return buf; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 630 | } |
| 631 | #else |
| 632 | static inline void *alloc_code_gen_buffer(void) |
| 633 | { |
Markus Armbruster | 8b98ade | 2015-02-04 11:26:07 +0100 | [diff] [blame] | 634 | void *buf = g_try_malloc(tcg_ctx.code_gen_buffer_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 635 | |
Richard Henderson | 483c76e | 2014-04-24 09:16:07 -0700 | [diff] [blame] | 636 | if (buf == NULL) { |
| 637 | return NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 638 | } |
Richard Henderson | 483c76e | 2014-04-24 09:16:07 -0700 | [diff] [blame] | 639 | |
| 640 | #ifdef __mips__ |
| 641 | if (cross_256mb(buf, tcg_ctx.code_gen_buffer_size)) { |
| 642 | void *buf2 = g_malloc(tcg_ctx.code_gen_buffer_size); |
| 643 | if (buf2 != NULL && !cross_256mb(buf2, size1)) { |
| 644 | /* Success! Use the new buffer. */ |
| 645 | free(buf); |
| 646 | buf = buf2; |
| 647 | } else { |
| 648 | /* Failure. Work with what we had. Since this is malloc |
| 649 | and not mmap, we can't free the other half. */ |
| 650 | free(buf2); |
| 651 | buf = split_cross_256mb(buf, tcg_ctx.code_gen_buffer_size); |
| 652 | } |
| 653 | } |
| 654 | #endif |
| 655 | |
| 656 | map_exec(buf, tcg_ctx.code_gen_buffer_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 657 | return buf; |
| 658 | } |
| 659 | #endif /* USE_STATIC_CODE_GEN_BUFFER, USE_MMAP */ |
| 660 | |
| 661 | static inline void code_gen_alloc(size_t tb_size) |
| 662 | { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 663 | tcg_ctx.code_gen_buffer_size = size_code_gen_buffer(tb_size); |
| 664 | tcg_ctx.code_gen_buffer = alloc_code_gen_buffer(); |
| 665 | if (tcg_ctx.code_gen_buffer == NULL) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 666 | fprintf(stderr, "Could not allocate dynamic translator buffer\n"); |
| 667 | exit(1); |
| 668 | } |
| 669 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 670 | qemu_madvise(tcg_ctx.code_gen_buffer, tcg_ctx.code_gen_buffer_size, |
| 671 | QEMU_MADV_HUGEPAGE); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 672 | |
| 673 | /* Steal room for the prologue at the end of the buffer. This ensures |
| 674 | (via the MAX_CODE_GEN_BUFFER_SIZE limits above) that direct branches |
| 675 | from TB's to the prologue are going to be in range. It also means |
| 676 | that we don't need to mark (additional) portions of the data segment |
| 677 | as executable. */ |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 678 | tcg_ctx.code_gen_prologue = tcg_ctx.code_gen_buffer + |
| 679 | tcg_ctx.code_gen_buffer_size - 1024; |
| 680 | tcg_ctx.code_gen_buffer_size -= 1024; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 681 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 682 | 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] | 683 | (TCG_MAX_OP_SIZE * OPC_BUF_SIZE); |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 684 | tcg_ctx.code_gen_max_blocks = tcg_ctx.code_gen_buffer_size / |
| 685 | CODE_GEN_AVG_BLOCK_SIZE; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 686 | tcg_ctx.tb_ctx.tbs = |
| 687 | g_malloc(tcg_ctx.code_gen_max_blocks * sizeof(TranslationBlock)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | /* Must be called before using the QEMU cpus. 'tb_size' is the size |
| 691 | (in bytes) allocated to the translation buffer. Zero means default |
| 692 | size. */ |
| 693 | void tcg_exec_init(unsigned long tb_size) |
| 694 | { |
| 695 | cpu_gen_init(); |
| 696 | code_gen_alloc(tb_size); |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 697 | tcg_ctx.code_gen_ptr = tcg_ctx.code_gen_buffer; |
| 698 | 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] | 699 | page_init(); |
| 700 | #if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE) |
| 701 | /* There's no guest base to take into account, so go ahead and |
| 702 | initialize the prologue now. */ |
| 703 | tcg_prologue_init(&tcg_ctx); |
| 704 | #endif |
| 705 | } |
| 706 | |
| 707 | bool tcg_enabled(void) |
| 708 | { |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 709 | return tcg_ctx.code_gen_buffer != NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 710 | } |
| 711 | |
| 712 | /* Allocate a new translation block. Flush the translation buffer if |
| 713 | too many translation blocks or too much generated code. */ |
| 714 | static TranslationBlock *tb_alloc(target_ulong pc) |
| 715 | { |
| 716 | TranslationBlock *tb; |
| 717 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 718 | 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] | 719 | (tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer) >= |
| 720 | tcg_ctx.code_gen_buffer_max_size) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 721 | return NULL; |
| 722 | } |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 723 | tb = &tcg_ctx.tb_ctx.tbs[tcg_ctx.tb_ctx.nb_tbs++]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 724 | tb->pc = pc; |
| 725 | tb->cflags = 0; |
| 726 | return tb; |
| 727 | } |
| 728 | |
| 729 | void tb_free(TranslationBlock *tb) |
| 730 | { |
| 731 | /* In practice this is mostly used for single use temporary TB |
| 732 | Ignore the hard cases and just back up if this TB happens to |
| 733 | be the last one generated. */ |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 734 | if (tcg_ctx.tb_ctx.nb_tbs > 0 && |
| 735 | 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] | 736 | tcg_ctx.code_gen_ptr = tb->tc_ptr; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 737 | tcg_ctx.tb_ctx.nb_tbs--; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 738 | } |
| 739 | } |
| 740 | |
| 741 | static inline void invalidate_page_bitmap(PageDesc *p) |
| 742 | { |
| 743 | if (p->code_bitmap) { |
| 744 | g_free(p->code_bitmap); |
| 745 | p->code_bitmap = NULL; |
| 746 | } |
| 747 | p->code_write_count = 0; |
| 748 | } |
| 749 | |
| 750 | /* Set to NULL all the 'first_tb' fields in all PageDescs. */ |
| 751 | static void page_flush_tb_1(int level, void **lp) |
| 752 | { |
| 753 | int i; |
| 754 | |
| 755 | if (*lp == NULL) { |
| 756 | return; |
| 757 | } |
| 758 | if (level == 0) { |
| 759 | PageDesc *pd = *lp; |
| 760 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 761 | for (i = 0; i < V_L2_SIZE; ++i) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 762 | pd[i].first_tb = NULL; |
| 763 | invalidate_page_bitmap(pd + i); |
| 764 | } |
| 765 | } else { |
| 766 | void **pp = *lp; |
| 767 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 768 | for (i = 0; i < V_L2_SIZE; ++i) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 769 | page_flush_tb_1(level - 1, pp + i); |
| 770 | } |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | static void page_flush_tb(void) |
| 775 | { |
| 776 | int i; |
| 777 | |
| 778 | for (i = 0; i < V_L1_SIZE; i++) { |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 779 | page_flush_tb_1(V_L1_SHIFT / V_L2_BITS - 1, l1_map + i); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 780 | } |
| 781 | } |
| 782 | |
| 783 | /* flush all the translation blocks */ |
| 784 | /* XXX: tb_flush is currently not thread safe */ |
| 785 | void tb_flush(CPUArchState *env1) |
| 786 | { |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 787 | CPUState *cpu = ENV_GET_CPU(env1); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 788 | |
| 789 | #if defined(DEBUG_FLUSH) |
| 790 | 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] | 791 | (unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer), |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 792 | 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] | 793 | ((unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer)) / |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 794 | tcg_ctx.tb_ctx.nb_tbs : 0); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 795 | #endif |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 796 | if ((unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer) |
| 797 | > tcg_ctx.code_gen_buffer_size) { |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 798 | cpu_abort(cpu, "Internal error: code buffer overflow\n"); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 799 | } |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 800 | tcg_ctx.tb_ctx.nb_tbs = 0; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 801 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 802 | CPU_FOREACH(cpu) { |
Andreas Färber | 8cd7043 | 2013-08-26 06:03:38 +0200 | [diff] [blame] | 803 | memset(cpu->tb_jmp_cache, 0, sizeof(cpu->tb_jmp_cache)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 804 | } |
| 805 | |
Richard Henderson | eb2535f | 2013-12-07 10:44:52 +1300 | [diff] [blame] | 806 | memset(tcg_ctx.tb_ctx.tb_phys_hash, 0, sizeof(tcg_ctx.tb_ctx.tb_phys_hash)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 807 | page_flush_tb(); |
| 808 | |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 809 | tcg_ctx.code_gen_ptr = tcg_ctx.code_gen_buffer; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 810 | /* XXX: flush processor icache at this point if cache flush is |
| 811 | expensive */ |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 812 | tcg_ctx.tb_ctx.tb_flush_count++; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 813 | } |
| 814 | |
| 815 | #ifdef DEBUG_TB_CHECK |
| 816 | |
| 817 | static void tb_invalidate_check(target_ulong address) |
| 818 | { |
| 819 | TranslationBlock *tb; |
| 820 | int i; |
| 821 | |
| 822 | address &= TARGET_PAGE_MASK; |
| 823 | for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 824 | 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] | 825 | if (!(address + TARGET_PAGE_SIZE <= tb->pc || |
| 826 | address >= tb->pc + tb->size)) { |
| 827 | printf("ERROR invalidate: address=" TARGET_FMT_lx |
| 828 | " PC=%08lx size=%04x\n", |
| 829 | address, (long)tb->pc, tb->size); |
| 830 | } |
| 831 | } |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | /* verify that all the pages have correct rights for code */ |
| 836 | static void tb_page_check(void) |
| 837 | { |
| 838 | TranslationBlock *tb; |
| 839 | int i, flags1, flags2; |
| 840 | |
| 841 | for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 842 | for (tb = tcg_ctx.tb_ctx.tb_phys_hash[i]; tb != NULL; |
| 843 | tb = tb->phys_hash_next) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 844 | flags1 = page_get_flags(tb->pc); |
| 845 | flags2 = page_get_flags(tb->pc + tb->size - 1); |
| 846 | if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) { |
| 847 | printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n", |
| 848 | (long)tb->pc, tb->size, flags1, flags2); |
| 849 | } |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | #endif |
| 855 | |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 856 | static inline void tb_hash_remove(TranslationBlock **ptb, TranslationBlock *tb) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 857 | { |
| 858 | TranslationBlock *tb1; |
| 859 | |
| 860 | for (;;) { |
| 861 | tb1 = *ptb; |
| 862 | if (tb1 == tb) { |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 863 | *ptb = tb1->phys_hash_next; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 864 | break; |
| 865 | } |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 866 | ptb = &tb1->phys_hash_next; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 867 | } |
| 868 | } |
| 869 | |
| 870 | static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
| 871 | { |
| 872 | TranslationBlock *tb1; |
| 873 | unsigned int n1; |
| 874 | |
| 875 | for (;;) { |
| 876 | tb1 = *ptb; |
| 877 | n1 = (uintptr_t)tb1 & 3; |
| 878 | tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3); |
| 879 | if (tb1 == tb) { |
| 880 | *ptb = tb1->page_next[n1]; |
| 881 | break; |
| 882 | } |
| 883 | ptb = &tb1->page_next[n1]; |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
| 888 | { |
| 889 | TranslationBlock *tb1, **ptb; |
| 890 | unsigned int n1; |
| 891 | |
| 892 | ptb = &tb->jmp_next[n]; |
| 893 | tb1 = *ptb; |
| 894 | if (tb1) { |
| 895 | /* find tb(n) in circular list */ |
| 896 | for (;;) { |
| 897 | tb1 = *ptb; |
| 898 | n1 = (uintptr_t)tb1 & 3; |
| 899 | tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3); |
| 900 | if (n1 == n && tb1 == tb) { |
| 901 | break; |
| 902 | } |
| 903 | if (n1 == 2) { |
| 904 | ptb = &tb1->jmp_first; |
| 905 | } else { |
| 906 | ptb = &tb1->jmp_next[n1]; |
| 907 | } |
| 908 | } |
| 909 | /* now we can suppress tb(n) from the list */ |
| 910 | *ptb = tb->jmp_next[n]; |
| 911 | |
| 912 | tb->jmp_next[n] = NULL; |
| 913 | } |
| 914 | } |
| 915 | |
| 916 | /* reset the jump entry 'n' of a TB so that it is not chained to |
| 917 | another TB */ |
| 918 | static inline void tb_reset_jump(TranslationBlock *tb, int n) |
| 919 | { |
| 920 | tb_set_jmp_target(tb, n, (uintptr_t)(tb->tc_ptr + tb->tb_next_offset[n])); |
| 921 | } |
| 922 | |
陳韋任 (Wei-Ren Chen) | 0c884d1 | 2012-12-20 09:39:16 +0800 | [diff] [blame] | 923 | /* invalidate one TB */ |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 924 | void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr) |
| 925 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 926 | CPUState *cpu; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 927 | PageDesc *p; |
| 928 | unsigned int h, n1; |
| 929 | tb_page_addr_t phys_pc; |
| 930 | TranslationBlock *tb1, *tb2; |
| 931 | |
| 932 | /* remove the TB from the hash list */ |
| 933 | phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); |
| 934 | h = tb_phys_hash_func(phys_pc); |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 935 | tb_hash_remove(&tcg_ctx.tb_ctx.tb_phys_hash[h], tb); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 936 | |
| 937 | /* remove the TB from the page list */ |
| 938 | if (tb->page_addr[0] != page_addr) { |
| 939 | p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS); |
| 940 | tb_page_remove(&p->first_tb, tb); |
| 941 | invalidate_page_bitmap(p); |
| 942 | } |
| 943 | if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
| 944 | p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS); |
| 945 | tb_page_remove(&p->first_tb, tb); |
| 946 | invalidate_page_bitmap(p); |
| 947 | } |
| 948 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 949 | tcg_ctx.tb_ctx.tb_invalidated_flag = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 950 | |
| 951 | /* remove the TB from the hash list */ |
| 952 | h = tb_jmp_cache_hash_func(tb->pc); |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 953 | CPU_FOREACH(cpu) { |
Andreas Färber | 8cd7043 | 2013-08-26 06:03:38 +0200 | [diff] [blame] | 954 | if (cpu->tb_jmp_cache[h] == tb) { |
| 955 | cpu->tb_jmp_cache[h] = NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 956 | } |
| 957 | } |
| 958 | |
| 959 | /* suppress this TB from the two jump lists */ |
| 960 | tb_jmp_remove(tb, 0); |
| 961 | tb_jmp_remove(tb, 1); |
| 962 | |
| 963 | /* suppress any remaining jumps to this TB */ |
| 964 | tb1 = tb->jmp_first; |
| 965 | for (;;) { |
| 966 | n1 = (uintptr_t)tb1 & 3; |
| 967 | if (n1 == 2) { |
| 968 | break; |
| 969 | } |
| 970 | tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3); |
| 971 | tb2 = tb1->jmp_next[n1]; |
| 972 | tb_reset_jump(tb1, n1); |
| 973 | tb1->jmp_next[n1] = NULL; |
| 974 | tb1 = tb2; |
| 975 | } |
| 976 | tb->jmp_first = (TranslationBlock *)((uintptr_t)tb | 2); /* fail safe */ |
| 977 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 978 | tcg_ctx.tb_ctx.tb_phys_invalidate_count++; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 979 | } |
| 980 | |
| 981 | static inline void set_bits(uint8_t *tab, int start, int len) |
| 982 | { |
| 983 | int end, mask, end1; |
| 984 | |
| 985 | end = start + len; |
| 986 | tab += start >> 3; |
| 987 | mask = 0xff << (start & 7); |
| 988 | if ((start & ~7) == (end & ~7)) { |
| 989 | if (start < end) { |
| 990 | mask &= ~(0xff << (end & 7)); |
| 991 | *tab |= mask; |
| 992 | } |
| 993 | } else { |
| 994 | *tab++ |= mask; |
| 995 | start = (start + 8) & ~7; |
| 996 | end1 = end & ~7; |
| 997 | while (start < end1) { |
| 998 | *tab++ = 0xff; |
| 999 | start += 8; |
| 1000 | } |
| 1001 | if (start < end) { |
| 1002 | mask = ~(0xff << (end & 7)); |
| 1003 | *tab |= mask; |
| 1004 | } |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | static void build_page_bitmap(PageDesc *p) |
| 1009 | { |
| 1010 | int n, tb_start, tb_end; |
| 1011 | TranslationBlock *tb; |
| 1012 | |
| 1013 | p->code_bitmap = g_malloc0(TARGET_PAGE_SIZE / 8); |
| 1014 | |
| 1015 | tb = p->first_tb; |
| 1016 | while (tb != NULL) { |
| 1017 | n = (uintptr_t)tb & 3; |
| 1018 | tb = (TranslationBlock *)((uintptr_t)tb & ~3); |
| 1019 | /* NOTE: this is subtle as a TB may span two physical pages */ |
| 1020 | if (n == 0) { |
| 1021 | /* NOTE: tb_end may be after the end of the page, but |
| 1022 | it is not a problem */ |
| 1023 | tb_start = tb->pc & ~TARGET_PAGE_MASK; |
| 1024 | tb_end = tb_start + tb->size; |
| 1025 | if (tb_end > TARGET_PAGE_SIZE) { |
| 1026 | tb_end = TARGET_PAGE_SIZE; |
| 1027 | } |
| 1028 | } else { |
| 1029 | tb_start = 0; |
| 1030 | tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 1031 | } |
| 1032 | set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
| 1033 | tb = tb->page_next[n]; |
| 1034 | } |
| 1035 | } |
| 1036 | |
Andreas Färber | 648f034 | 2013-09-01 17:43:17 +0200 | [diff] [blame] | 1037 | TranslationBlock *tb_gen_code(CPUState *cpu, |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1038 | target_ulong pc, target_ulong cs_base, |
| 1039 | int flags, int cflags) |
| 1040 | { |
Andreas Färber | 648f034 | 2013-09-01 17:43:17 +0200 | [diff] [blame] | 1041 | CPUArchState *env = cpu->env_ptr; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1042 | TranslationBlock *tb; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1043 | tb_page_addr_t phys_pc, phys_page2; |
| 1044 | target_ulong virt_page2; |
| 1045 | int code_gen_size; |
| 1046 | |
| 1047 | phys_pc = get_page_addr_code(env, pc); |
Paolo Bonzini | 0266359 | 2014-11-26 13:39:53 +0300 | [diff] [blame] | 1048 | if (use_icount) { |
| 1049 | cflags |= CF_USE_ICOUNT; |
| 1050 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1051 | tb = tb_alloc(pc); |
| 1052 | if (!tb) { |
| 1053 | /* flush must be done */ |
| 1054 | tb_flush(env); |
| 1055 | /* cannot fail at this point */ |
| 1056 | tb = tb_alloc(pc); |
| 1057 | /* Don't forget to invalidate previous TB info. */ |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1058 | tcg_ctx.tb_ctx.tb_invalidated_flag = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1059 | } |
Richard Henderson | 1813e17 | 2014-03-28 12:56:22 -0700 | [diff] [blame] | 1060 | tb->tc_ptr = tcg_ctx.code_gen_ptr; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1061 | tb->cs_base = cs_base; |
| 1062 | tb->flags = flags; |
| 1063 | tb->cflags = cflags; |
| 1064 | cpu_gen_code(env, tb, &code_gen_size); |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 1065 | tcg_ctx.code_gen_ptr = (void *)(((uintptr_t)tcg_ctx.code_gen_ptr + |
| 1066 | code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1067 | |
| 1068 | /* check next page if needed */ |
| 1069 | virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK; |
| 1070 | phys_page2 = -1; |
| 1071 | if ((pc & TARGET_PAGE_MASK) != virt_page2) { |
| 1072 | phys_page2 = get_page_addr_code(env, virt_page2); |
| 1073 | } |
| 1074 | tb_link_page(tb, phys_pc, phys_page2); |
| 1075 | return tb; |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * Invalidate all TBs which intersect with the target physical address range |
| 1080 | * [start;end[. NOTE: start and end may refer to *different* physical pages. |
| 1081 | * 'is_cpu_write_access' should be true if called from a real cpu write |
| 1082 | * access: the virtual CPU will exit the current TB if code is modified inside |
| 1083 | * this TB. |
| 1084 | */ |
| 1085 | void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end, |
| 1086 | int is_cpu_write_access) |
| 1087 | { |
| 1088 | while (start < end) { |
| 1089 | tb_invalidate_phys_page_range(start, end, is_cpu_write_access); |
| 1090 | start &= TARGET_PAGE_MASK; |
| 1091 | start += TARGET_PAGE_SIZE; |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | /* |
| 1096 | * Invalidate all TBs which intersect with the target physical address range |
| 1097 | * [start;end[. NOTE: start and end must refer to the *same* physical page. |
| 1098 | * 'is_cpu_write_access' should be true if called from a real cpu write |
| 1099 | * access: the virtual CPU will exit the current TB if code is modified inside |
| 1100 | * this TB. |
| 1101 | */ |
| 1102 | void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end, |
| 1103 | int is_cpu_write_access) |
| 1104 | { |
| 1105 | TranslationBlock *tb, *tb_next, *saved_tb; |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1106 | CPUState *cpu = current_cpu; |
Andreas Färber | baea4fa | 2013-09-03 10:51:26 +0200 | [diff] [blame] | 1107 | #if defined(TARGET_HAS_PRECISE_SMC) |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1108 | CPUArchState *env = NULL; |
| 1109 | #endif |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1110 | tb_page_addr_t tb_start, tb_end; |
| 1111 | PageDesc *p; |
| 1112 | int n; |
| 1113 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1114 | int current_tb_not_found = is_cpu_write_access; |
| 1115 | TranslationBlock *current_tb = NULL; |
| 1116 | int current_tb_modified = 0; |
| 1117 | target_ulong current_pc = 0; |
| 1118 | target_ulong current_cs_base = 0; |
| 1119 | int current_flags = 0; |
| 1120 | #endif /* TARGET_HAS_PRECISE_SMC */ |
| 1121 | |
| 1122 | p = page_find(start >> TARGET_PAGE_BITS); |
| 1123 | if (!p) { |
| 1124 | return; |
| 1125 | } |
| 1126 | if (!p->code_bitmap && |
| 1127 | ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && |
| 1128 | is_cpu_write_access) { |
| 1129 | /* build code bitmap */ |
| 1130 | build_page_bitmap(p); |
| 1131 | } |
Andreas Färber | baea4fa | 2013-09-03 10:51:26 +0200 | [diff] [blame] | 1132 | #if defined(TARGET_HAS_PRECISE_SMC) |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1133 | if (cpu != NULL) { |
| 1134 | env = cpu->env_ptr; |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1135 | } |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1136 | #endif |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1137 | |
| 1138 | /* we remove all the TBs in the range [start, end[ */ |
| 1139 | /* XXX: see if in some cases it could be faster to invalidate all |
| 1140 | the code */ |
| 1141 | tb = p->first_tb; |
| 1142 | while (tb != NULL) { |
| 1143 | n = (uintptr_t)tb & 3; |
| 1144 | tb = (TranslationBlock *)((uintptr_t)tb & ~3); |
| 1145 | tb_next = tb->page_next[n]; |
| 1146 | /* NOTE: this is subtle as a TB may span two physical pages */ |
| 1147 | if (n == 0) { |
| 1148 | /* NOTE: tb_end may be after the end of the page, but |
| 1149 | it is not a problem */ |
| 1150 | tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); |
| 1151 | tb_end = tb_start + tb->size; |
| 1152 | } else { |
| 1153 | tb_start = tb->page_addr[1]; |
| 1154 | tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 1155 | } |
| 1156 | if (!(tb_end <= start || tb_start >= end)) { |
| 1157 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1158 | if (current_tb_not_found) { |
| 1159 | current_tb_not_found = 0; |
| 1160 | current_tb = NULL; |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 1161 | if (cpu->mem_io_pc) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1162 | /* now we have a real cpu fault */ |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 1163 | current_tb = tb_find_pc(cpu->mem_io_pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1164 | } |
| 1165 | } |
| 1166 | if (current_tb == tb && |
| 1167 | (current_tb->cflags & CF_COUNT_MASK) != 1) { |
| 1168 | /* If we are modifying the current TB, we must stop |
| 1169 | its execution. We could be more precise by checking |
| 1170 | that the modification is after the current PC, but it |
| 1171 | would require a specialized function to partially |
| 1172 | restore the CPU state */ |
| 1173 | |
| 1174 | current_tb_modified = 1; |
Andreas Färber | 74f1051 | 2013-09-01 17:02:58 +0200 | [diff] [blame] | 1175 | cpu_restore_state_from_tb(cpu, current_tb, cpu->mem_io_pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1176 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
| 1177 | ¤t_flags); |
| 1178 | } |
| 1179 | #endif /* TARGET_HAS_PRECISE_SMC */ |
| 1180 | /* we need to do that to handle the case where a signal |
| 1181 | occurs while doing tb_phys_invalidate() */ |
| 1182 | saved_tb = NULL; |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1183 | if (cpu != NULL) { |
| 1184 | saved_tb = cpu->current_tb; |
| 1185 | cpu->current_tb = NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1186 | } |
| 1187 | tb_phys_invalidate(tb, -1); |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1188 | if (cpu != NULL) { |
| 1189 | cpu->current_tb = saved_tb; |
Andreas Färber | c3affe5 | 2013-01-18 15:03:43 +0100 | [diff] [blame] | 1190 | if (cpu->interrupt_request && cpu->current_tb) { |
| 1191 | cpu_interrupt(cpu, cpu->interrupt_request); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1192 | } |
| 1193 | } |
| 1194 | } |
| 1195 | tb = tb_next; |
| 1196 | } |
| 1197 | #if !defined(CONFIG_USER_ONLY) |
| 1198 | /* if no code remaining, no need to continue to use slow writes */ |
| 1199 | if (!p->first_tb) { |
| 1200 | invalidate_page_bitmap(p); |
| 1201 | if (is_cpu_write_access) { |
Andreas Färber | baea4fa | 2013-09-03 10:51:26 +0200 | [diff] [blame] | 1202 | tlb_unprotect_code_phys(cpu, start, cpu->mem_io_vaddr); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1203 | } |
| 1204 | } |
| 1205 | #endif |
| 1206 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1207 | if (current_tb_modified) { |
| 1208 | /* we generate a block containing just the instruction |
| 1209 | modifying the memory. It will ensure that it cannot modify |
| 1210 | itself */ |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1211 | cpu->current_tb = NULL; |
Andreas Färber | 648f034 | 2013-09-01 17:43:17 +0200 | [diff] [blame] | 1212 | tb_gen_code(cpu, current_pc, current_cs_base, current_flags, 1); |
Andreas Färber | 0ea8cb8 | 2013-09-03 02:12:23 +0200 | [diff] [blame] | 1213 | cpu_resume_from_signal(cpu, NULL); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1214 | } |
| 1215 | #endif |
| 1216 | } |
| 1217 | |
| 1218 | /* len must be <= 8 and start must be a multiple of len */ |
| 1219 | void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len) |
| 1220 | { |
| 1221 | PageDesc *p; |
| 1222 | int offset, b; |
| 1223 | |
| 1224 | #if 0 |
| 1225 | if (1) { |
| 1226 | qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n", |
| 1227 | cpu_single_env->mem_io_vaddr, len, |
| 1228 | cpu_single_env->eip, |
| 1229 | cpu_single_env->eip + |
| 1230 | (intptr_t)cpu_single_env->segs[R_CS].base); |
| 1231 | } |
| 1232 | #endif |
| 1233 | p = page_find(start >> TARGET_PAGE_BITS); |
| 1234 | if (!p) { |
| 1235 | return; |
| 1236 | } |
| 1237 | if (p->code_bitmap) { |
| 1238 | offset = start & ~TARGET_PAGE_MASK; |
| 1239 | b = p->code_bitmap[offset >> 3] >> (offset & 7); |
| 1240 | if (b & ((1 << len) - 1)) { |
| 1241 | goto do_invalidate; |
| 1242 | } |
| 1243 | } else { |
| 1244 | do_invalidate: |
| 1245 | tb_invalidate_phys_page_range(start, start + len, 1); |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | #if !defined(CONFIG_SOFTMMU) |
| 1250 | static void tb_invalidate_phys_page(tb_page_addr_t addr, |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1251 | uintptr_t pc, void *puc, |
| 1252 | bool locked) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1253 | { |
| 1254 | TranslationBlock *tb; |
| 1255 | PageDesc *p; |
| 1256 | int n; |
| 1257 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1258 | TranslationBlock *current_tb = NULL; |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1259 | CPUState *cpu = current_cpu; |
| 1260 | CPUArchState *env = NULL; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1261 | int current_tb_modified = 0; |
| 1262 | target_ulong current_pc = 0; |
| 1263 | target_ulong current_cs_base = 0; |
| 1264 | int current_flags = 0; |
| 1265 | #endif |
| 1266 | |
| 1267 | addr &= TARGET_PAGE_MASK; |
| 1268 | p = page_find(addr >> TARGET_PAGE_BITS); |
| 1269 | if (!p) { |
| 1270 | return; |
| 1271 | } |
| 1272 | tb = p->first_tb; |
| 1273 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1274 | if (tb && pc != 0) { |
| 1275 | current_tb = tb_find_pc(pc); |
| 1276 | } |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 1277 | if (cpu != NULL) { |
| 1278 | env = cpu->env_ptr; |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1279 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1280 | #endif |
| 1281 | while (tb != NULL) { |
| 1282 | n = (uintptr_t)tb & 3; |
| 1283 | tb = (TranslationBlock *)((uintptr_t)tb & ~3); |
| 1284 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1285 | if (current_tb == tb && |
| 1286 | (current_tb->cflags & CF_COUNT_MASK) != 1) { |
| 1287 | /* If we are modifying the current TB, we must stop |
| 1288 | its execution. We could be more precise by checking |
| 1289 | that the modification is after the current PC, but it |
| 1290 | would require a specialized function to partially |
| 1291 | restore the CPU state */ |
| 1292 | |
| 1293 | current_tb_modified = 1; |
Andreas Färber | 74f1051 | 2013-09-01 17:02:58 +0200 | [diff] [blame] | 1294 | cpu_restore_state_from_tb(cpu, current_tb, pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1295 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
| 1296 | ¤t_flags); |
| 1297 | } |
| 1298 | #endif /* TARGET_HAS_PRECISE_SMC */ |
| 1299 | tb_phys_invalidate(tb, addr); |
| 1300 | tb = tb->page_next[n]; |
| 1301 | } |
| 1302 | p->first_tb = NULL; |
| 1303 | #ifdef TARGET_HAS_PRECISE_SMC |
| 1304 | if (current_tb_modified) { |
| 1305 | /* we generate a block containing just the instruction |
| 1306 | modifying the memory. It will ensure that it cannot modify |
| 1307 | itself */ |
Andreas Färber | d77953b | 2013-01-16 19:29:31 +0100 | [diff] [blame] | 1308 | cpu->current_tb = NULL; |
Andreas Färber | 648f034 | 2013-09-01 17:43:17 +0200 | [diff] [blame] | 1309 | tb_gen_code(cpu, current_pc, current_cs_base, current_flags, 1); |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1310 | if (locked) { |
| 1311 | mmap_unlock(); |
| 1312 | } |
Andreas Färber | 0ea8cb8 | 2013-09-03 02:12:23 +0200 | [diff] [blame] | 1313 | cpu_resume_from_signal(cpu, puc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1314 | } |
| 1315 | #endif |
| 1316 | } |
| 1317 | #endif |
| 1318 | |
| 1319 | /* add the tb in the target page and protect it if necessary */ |
| 1320 | static inline void tb_alloc_page(TranslationBlock *tb, |
| 1321 | unsigned int n, tb_page_addr_t page_addr) |
| 1322 | { |
| 1323 | PageDesc *p; |
| 1324 | #ifndef CONFIG_USER_ONLY |
| 1325 | bool page_already_protected; |
| 1326 | #endif |
| 1327 | |
| 1328 | tb->page_addr[n] = page_addr; |
| 1329 | p = page_find_alloc(page_addr >> TARGET_PAGE_BITS, 1); |
| 1330 | tb->page_next[n] = p->first_tb; |
| 1331 | #ifndef CONFIG_USER_ONLY |
| 1332 | page_already_protected = p->first_tb != NULL; |
| 1333 | #endif |
| 1334 | p->first_tb = (TranslationBlock *)((uintptr_t)tb | n); |
| 1335 | invalidate_page_bitmap(p); |
| 1336 | |
| 1337 | #if defined(TARGET_HAS_SMC) || 1 |
| 1338 | |
| 1339 | #if defined(CONFIG_USER_ONLY) |
| 1340 | if (p->flags & PAGE_WRITE) { |
| 1341 | target_ulong addr; |
| 1342 | PageDesc *p2; |
| 1343 | int prot; |
| 1344 | |
| 1345 | /* force the host page as non writable (writes will have a |
| 1346 | page fault + mprotect overhead) */ |
| 1347 | page_addr &= qemu_host_page_mask; |
| 1348 | prot = 0; |
| 1349 | for (addr = page_addr; addr < page_addr + qemu_host_page_size; |
| 1350 | addr += TARGET_PAGE_SIZE) { |
| 1351 | |
| 1352 | p2 = page_find(addr >> TARGET_PAGE_BITS); |
| 1353 | if (!p2) { |
| 1354 | continue; |
| 1355 | } |
| 1356 | prot |= p2->flags; |
| 1357 | p2->flags &= ~PAGE_WRITE; |
| 1358 | } |
| 1359 | mprotect(g2h(page_addr), qemu_host_page_size, |
| 1360 | (prot & PAGE_BITS) & ~PAGE_WRITE); |
| 1361 | #ifdef DEBUG_TB_INVALIDATE |
| 1362 | printf("protecting code page: 0x" TARGET_FMT_lx "\n", |
| 1363 | page_addr); |
| 1364 | #endif |
| 1365 | } |
| 1366 | #else |
| 1367 | /* if some code is already present, then the pages are already |
| 1368 | protected. So we handle the case where only the first TB is |
| 1369 | allocated in a physical page */ |
| 1370 | if (!page_already_protected) { |
| 1371 | tlb_protect_code(page_addr); |
| 1372 | } |
| 1373 | #endif |
| 1374 | |
| 1375 | #endif /* TARGET_HAS_SMC */ |
| 1376 | } |
| 1377 | |
| 1378 | /* add a new TB and link it to the physical page tables. phys_page2 is |
| 1379 | (-1) to indicate that only one page contains the TB. */ |
| 1380 | static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc, |
| 1381 | tb_page_addr_t phys_page2) |
| 1382 | { |
| 1383 | unsigned int h; |
| 1384 | TranslationBlock **ptb; |
| 1385 | |
| 1386 | /* Grab the mmap lock to stop another thread invalidating this TB |
| 1387 | before we are done. */ |
| 1388 | mmap_lock(); |
| 1389 | /* add in the physical hash table */ |
| 1390 | h = tb_phys_hash_func(phys_pc); |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1391 | ptb = &tcg_ctx.tb_ctx.tb_phys_hash[h]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1392 | tb->phys_hash_next = *ptb; |
| 1393 | *ptb = tb; |
| 1394 | |
| 1395 | /* add in the page list */ |
| 1396 | tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK); |
| 1397 | if (phys_page2 != -1) { |
| 1398 | tb_alloc_page(tb, 1, phys_page2); |
| 1399 | } else { |
| 1400 | tb->page_addr[1] = -1; |
| 1401 | } |
| 1402 | |
| 1403 | tb->jmp_first = (TranslationBlock *)((uintptr_t)tb | 2); |
| 1404 | tb->jmp_next[0] = NULL; |
| 1405 | tb->jmp_next[1] = NULL; |
| 1406 | |
| 1407 | /* init original jump addresses */ |
| 1408 | if (tb->tb_next_offset[0] != 0xffff) { |
| 1409 | tb_reset_jump(tb, 0); |
| 1410 | } |
| 1411 | if (tb->tb_next_offset[1] != 0xffff) { |
| 1412 | tb_reset_jump(tb, 1); |
| 1413 | } |
| 1414 | |
| 1415 | #ifdef DEBUG_TB_CHECK |
| 1416 | tb_page_check(); |
| 1417 | #endif |
| 1418 | mmap_unlock(); |
| 1419 | } |
| 1420 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1421 | /* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr < |
| 1422 | tb[1].tc_ptr. Return NULL if not found */ |
Blue Swirl | a8a826a | 2012-12-04 20:16:07 +0000 | [diff] [blame] | 1423 | static TranslationBlock *tb_find_pc(uintptr_t tc_ptr) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1424 | { |
| 1425 | int m_min, m_max, m; |
| 1426 | uintptr_t v; |
| 1427 | TranslationBlock *tb; |
| 1428 | |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1429 | if (tcg_ctx.tb_ctx.nb_tbs <= 0) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1430 | return NULL; |
| 1431 | } |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 1432 | if (tc_ptr < (uintptr_t)tcg_ctx.code_gen_buffer || |
| 1433 | tc_ptr >= (uintptr_t)tcg_ctx.code_gen_ptr) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1434 | return NULL; |
| 1435 | } |
| 1436 | /* binary search (cf Knuth) */ |
| 1437 | m_min = 0; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1438 | m_max = tcg_ctx.tb_ctx.nb_tbs - 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1439 | while (m_min <= m_max) { |
| 1440 | m = (m_min + m_max) >> 1; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1441 | tb = &tcg_ctx.tb_ctx.tbs[m]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1442 | v = (uintptr_t)tb->tc_ptr; |
| 1443 | if (v == tc_ptr) { |
| 1444 | return tb; |
| 1445 | } else if (tc_ptr < v) { |
| 1446 | m_max = m - 1; |
| 1447 | } else { |
| 1448 | m_min = m + 1; |
| 1449 | } |
| 1450 | } |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1451 | return &tcg_ctx.tb_ctx.tbs[m_max]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1452 | } |
| 1453 | |
Peter Maydell | ec53b45 | 2015-01-20 15:19:32 +0000 | [diff] [blame] | 1454 | #if !defined(CONFIG_USER_ONLY) |
Edgar E. Iglesias | 29d8ec7 | 2013-11-07 19:43:10 +0100 | [diff] [blame] | 1455 | void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1456 | { |
| 1457 | ram_addr_t ram_addr; |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 1458 | MemoryRegion *mr; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1459 | hwaddr l = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1460 | |
Edgar E. Iglesias | 29d8ec7 | 2013-11-07 19:43:10 +0100 | [diff] [blame] | 1461 | mr = address_space_translate(as, addr, &addr, &l, false); |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 1462 | if (!(memory_region_is_ram(mr) |
| 1463 | || memory_region_is_romd(mr))) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1464 | return; |
| 1465 | } |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 1466 | ram_addr = (memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK) |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1467 | + addr; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1468 | tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0); |
| 1469 | } |
Peter Maydell | ec53b45 | 2015-01-20 15:19:32 +0000 | [diff] [blame] | 1470 | #endif /* !defined(CONFIG_USER_ONLY) */ |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1471 | |
Andreas Färber | 239c51a | 2013-09-01 17:12:23 +0200 | [diff] [blame] | 1472 | void tb_check_watchpoint(CPUState *cpu) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1473 | { |
| 1474 | TranslationBlock *tb; |
| 1475 | |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 1476 | tb = tb_find_pc(cpu->mem_io_pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1477 | if (!tb) { |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 1478 | cpu_abort(cpu, "check_watchpoint: could not find TB for pc=%p", |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 1479 | (void *)cpu->mem_io_pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1480 | } |
Andreas Färber | 74f1051 | 2013-09-01 17:02:58 +0200 | [diff] [blame] | 1481 | cpu_restore_state_from_tb(cpu, tb, cpu->mem_io_pc); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1482 | tb_phys_invalidate(tb, -1); |
| 1483 | } |
| 1484 | |
| 1485 | #ifndef CONFIG_USER_ONLY |
| 1486 | /* mask must never be zero, except for A20 change call */ |
Andreas Färber | c3affe5 | 2013-01-18 15:03:43 +0100 | [diff] [blame] | 1487 | static void tcg_handle_interrupt(CPUState *cpu, int mask) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1488 | { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1489 | int old_mask; |
| 1490 | |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 1491 | old_mask = cpu->interrupt_request; |
| 1492 | cpu->interrupt_request |= mask; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1493 | |
| 1494 | /* |
| 1495 | * If called from iothread context, wake the target cpu in |
| 1496 | * case its halted. |
| 1497 | */ |
| 1498 | if (!qemu_cpu_is_self(cpu)) { |
| 1499 | qemu_cpu_kick(cpu); |
| 1500 | return; |
| 1501 | } |
| 1502 | |
| 1503 | if (use_icount) { |
Andreas Färber | 28ecfd7 | 2013-08-26 05:51:49 +0200 | [diff] [blame] | 1504 | cpu->icount_decr.u16.high = 0xffff; |
Andreas Färber | 99df7dc | 2013-08-26 05:15:23 +0200 | [diff] [blame] | 1505 | if (!cpu_can_do_io(cpu) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1506 | && (mask & ~old_mask) != 0) { |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 1507 | cpu_abort(cpu, "Raised interrupt while not in I/O function"); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1508 | } |
| 1509 | } else { |
Peter Maydell | 378df4b | 2013-02-22 18:10:03 +0000 | [diff] [blame] | 1510 | cpu->tcg_exit_req = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt; |
| 1515 | |
| 1516 | /* in deterministic execution mode, instructions doing device I/Os |
| 1517 | must be at the end of the TB */ |
Andreas Färber | 90b40a6 | 2013-09-01 17:21:47 +0200 | [diff] [blame] | 1518 | void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1519 | { |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 1520 | #if defined(TARGET_MIPS) || defined(TARGET_SH4) |
Andreas Färber | 90b40a6 | 2013-09-01 17:21:47 +0200 | [diff] [blame] | 1521 | CPUArchState *env = cpu->env_ptr; |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 1522 | #endif |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1523 | TranslationBlock *tb; |
| 1524 | uint32_t n, cflags; |
| 1525 | target_ulong pc, cs_base; |
| 1526 | uint64_t flags; |
| 1527 | |
| 1528 | tb = tb_find_pc(retaddr); |
| 1529 | if (!tb) { |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 1530 | cpu_abort(cpu, "cpu_io_recompile: could not find TB for pc=%p", |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1531 | (void *)retaddr); |
| 1532 | } |
Andreas Färber | 28ecfd7 | 2013-08-26 05:51:49 +0200 | [diff] [blame] | 1533 | n = cpu->icount_decr.u16.low + tb->icount; |
Andreas Färber | 74f1051 | 2013-09-01 17:02:58 +0200 | [diff] [blame] | 1534 | cpu_restore_state_from_tb(cpu, tb, retaddr); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1535 | /* Calculate how many instructions had been executed before the fault |
| 1536 | occurred. */ |
Andreas Färber | 28ecfd7 | 2013-08-26 05:51:49 +0200 | [diff] [blame] | 1537 | n = n - cpu->icount_decr.u16.low; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1538 | /* Generate a new TB ending on the I/O insn. */ |
| 1539 | n++; |
| 1540 | /* On MIPS and SH, delay slot instructions can only be restarted if |
| 1541 | they were already the first instruction in the TB. If this is not |
| 1542 | the first instruction in a TB then re-execute the preceding |
| 1543 | branch. */ |
| 1544 | #if defined(TARGET_MIPS) |
| 1545 | if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) { |
Maciej W. Rozycki | c357747 | 2014-11-07 20:05:35 +0000 | [diff] [blame] | 1546 | env->active_tc.PC -= (env->hflags & MIPS_HFLAG_B16 ? 2 : 4); |
Andreas Färber | 28ecfd7 | 2013-08-26 05:51:49 +0200 | [diff] [blame] | 1547 | cpu->icount_decr.u16.low++; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1548 | env->hflags &= ~MIPS_HFLAG_BMASK; |
| 1549 | } |
| 1550 | #elif defined(TARGET_SH4) |
| 1551 | if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0 |
| 1552 | && n > 1) { |
| 1553 | env->pc -= 2; |
Andreas Färber | 28ecfd7 | 2013-08-26 05:51:49 +0200 | [diff] [blame] | 1554 | cpu->icount_decr.u16.low++; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1555 | env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL); |
| 1556 | } |
| 1557 | #endif |
| 1558 | /* This should never happen. */ |
| 1559 | if (n > CF_COUNT_MASK) { |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 1560 | cpu_abort(cpu, "TB too big during recompile"); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1561 | } |
| 1562 | |
| 1563 | cflags = n | CF_LAST_IO; |
| 1564 | pc = tb->pc; |
| 1565 | cs_base = tb->cs_base; |
| 1566 | flags = tb->flags; |
| 1567 | tb_phys_invalidate(tb, -1); |
| 1568 | /* FIXME: In theory this could raise an exception. In practice |
| 1569 | we have already translated the block once so it's probably ok. */ |
Andreas Färber | 648f034 | 2013-09-01 17:43:17 +0200 | [diff] [blame] | 1570 | tb_gen_code(cpu, pc, cs_base, flags, cflags); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1571 | /* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not |
| 1572 | the first in the TB) then we end up generating a whole new TB and |
| 1573 | repeating the fault, which is horribly inefficient. |
| 1574 | Better would be to execute just this insn uncached, or generate a |
| 1575 | second new TB. */ |
Andreas Färber | 0ea8cb8 | 2013-09-03 02:12:23 +0200 | [diff] [blame] | 1576 | cpu_resume_from_signal(cpu, NULL); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1577 | } |
| 1578 | |
Andreas Färber | 611d4f9 | 2013-09-01 17:52:07 +0200 | [diff] [blame] | 1579 | void tb_flush_jmp_cache(CPUState *cpu, target_ulong addr) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1580 | { |
| 1581 | unsigned int i; |
| 1582 | |
| 1583 | /* Discard jump cache entries for any tb which might potentially |
| 1584 | overlap the flushed page. */ |
| 1585 | i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE); |
Andreas Färber | 8cd7043 | 2013-08-26 06:03:38 +0200 | [diff] [blame] | 1586 | memset(&cpu->tb_jmp_cache[i], 0, |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1587 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); |
| 1588 | |
| 1589 | i = tb_jmp_cache_hash_page(addr); |
Andreas Färber | 8cd7043 | 2013-08-26 06:03:38 +0200 | [diff] [blame] | 1590 | memset(&cpu->tb_jmp_cache[i], 0, |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1591 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); |
| 1592 | } |
| 1593 | |
| 1594 | void dump_exec_info(FILE *f, fprintf_function cpu_fprintf) |
| 1595 | { |
| 1596 | int i, target_code_size, max_target_code_size; |
| 1597 | int direct_jmp_count, direct_jmp2_count, cross_page; |
| 1598 | TranslationBlock *tb; |
| 1599 | |
| 1600 | target_code_size = 0; |
| 1601 | max_target_code_size = 0; |
| 1602 | cross_page = 0; |
| 1603 | direct_jmp_count = 0; |
| 1604 | direct_jmp2_count = 0; |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1605 | for (i = 0; i < tcg_ctx.tb_ctx.nb_tbs; i++) { |
| 1606 | tb = &tcg_ctx.tb_ctx.tbs[i]; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1607 | target_code_size += tb->size; |
| 1608 | if (tb->size > max_target_code_size) { |
| 1609 | max_target_code_size = tb->size; |
| 1610 | } |
| 1611 | if (tb->page_addr[1] != -1) { |
| 1612 | cross_page++; |
| 1613 | } |
| 1614 | if (tb->tb_next_offset[0] != 0xffff) { |
| 1615 | direct_jmp_count++; |
| 1616 | if (tb->tb_next_offset[1] != 0xffff) { |
| 1617 | direct_jmp2_count++; |
| 1618 | } |
| 1619 | } |
| 1620 | } |
| 1621 | /* XXX: avoid using doubles ? */ |
| 1622 | cpu_fprintf(f, "Translation buffer state:\n"); |
| 1623 | cpu_fprintf(f, "gen code size %td/%zd\n", |
Evgeny Voevodin | 0b0d332 | 2013-02-01 01:47:22 +0700 | [diff] [blame] | 1624 | tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer, |
| 1625 | tcg_ctx.code_gen_buffer_max_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1626 | cpu_fprintf(f, "TB count %d/%d\n", |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1627 | tcg_ctx.tb_ctx.nb_tbs, tcg_ctx.code_gen_max_blocks); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1628 | cpu_fprintf(f, "TB avg target size %d max=%d bytes\n", |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1629 | tcg_ctx.tb_ctx.nb_tbs ? target_code_size / |
| 1630 | tcg_ctx.tb_ctx.nb_tbs : 0, |
| 1631 | max_target_code_size); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1632 | 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] | 1633 | tcg_ctx.tb_ctx.nb_tbs ? (tcg_ctx.code_gen_ptr - |
| 1634 | tcg_ctx.code_gen_buffer) / |
| 1635 | tcg_ctx.tb_ctx.nb_tbs : 0, |
| 1636 | target_code_size ? (double) (tcg_ctx.code_gen_ptr - |
| 1637 | tcg_ctx.code_gen_buffer) / |
| 1638 | target_code_size : 0); |
| 1639 | cpu_fprintf(f, "cross page TB count %d (%d%%)\n", cross_page, |
| 1640 | tcg_ctx.tb_ctx.nb_tbs ? (cross_page * 100) / |
| 1641 | tcg_ctx.tb_ctx.nb_tbs : 0); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1642 | cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n", |
| 1643 | direct_jmp_count, |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1644 | tcg_ctx.tb_ctx.nb_tbs ? (direct_jmp_count * 100) / |
| 1645 | tcg_ctx.tb_ctx.nb_tbs : 0, |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1646 | direct_jmp2_count, |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1647 | tcg_ctx.tb_ctx.nb_tbs ? (direct_jmp2_count * 100) / |
| 1648 | tcg_ctx.tb_ctx.nb_tbs : 0); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1649 | cpu_fprintf(f, "\nStatistics:\n"); |
Evgeny Voevodin | 5e5f07e | 2013-02-01 01:47:23 +0700 | [diff] [blame] | 1650 | cpu_fprintf(f, "TB flush count %d\n", tcg_ctx.tb_ctx.tb_flush_count); |
| 1651 | cpu_fprintf(f, "TB invalidate count %d\n", |
| 1652 | tcg_ctx.tb_ctx.tb_phys_invalidate_count); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1653 | cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count); |
| 1654 | tcg_dump_info(f, cpu_fprintf); |
| 1655 | } |
| 1656 | |
Max Filippov | 246ae24 | 2014-11-02 11:04:18 +0300 | [diff] [blame] | 1657 | void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf) |
| 1658 | { |
| 1659 | tcg_dump_op_count(f, cpu_fprintf); |
| 1660 | } |
| 1661 | |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1662 | #else /* CONFIG_USER_ONLY */ |
| 1663 | |
Andreas Färber | c3affe5 | 2013-01-18 15:03:43 +0100 | [diff] [blame] | 1664 | void cpu_interrupt(CPUState *cpu, int mask) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1665 | { |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 1666 | cpu->interrupt_request |= mask; |
Peter Maydell | 378df4b | 2013-02-22 18:10:03 +0000 | [diff] [blame] | 1667 | cpu->tcg_exit_req = 1; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1668 | } |
| 1669 | |
| 1670 | /* |
| 1671 | * Walks guest process memory "regions" one by one |
| 1672 | * and calls callback function 'fn' for each region. |
| 1673 | */ |
| 1674 | struct walk_memory_regions_data { |
| 1675 | walk_memory_regions_fn fn; |
| 1676 | void *priv; |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1677 | target_ulong start; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1678 | int prot; |
| 1679 | }; |
| 1680 | |
| 1681 | static int walk_memory_regions_end(struct walk_memory_regions_data *data, |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1682 | target_ulong end, int new_prot) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1683 | { |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1684 | if (data->start != -1u) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1685 | int rc = data->fn(data->priv, data->start, end, data->prot); |
| 1686 | if (rc != 0) { |
| 1687 | return rc; |
| 1688 | } |
| 1689 | } |
| 1690 | |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1691 | data->start = (new_prot ? end : -1u); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1692 | data->prot = new_prot; |
| 1693 | |
| 1694 | return 0; |
| 1695 | } |
| 1696 | |
| 1697 | static int walk_memory_regions_1(struct walk_memory_regions_data *data, |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1698 | target_ulong base, int level, void **lp) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1699 | { |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1700 | target_ulong pa; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1701 | int i, rc; |
| 1702 | |
| 1703 | if (*lp == NULL) { |
| 1704 | return walk_memory_regions_end(data, base, 0); |
| 1705 | } |
| 1706 | |
| 1707 | if (level == 0) { |
| 1708 | PageDesc *pd = *lp; |
| 1709 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 1710 | for (i = 0; i < V_L2_SIZE; ++i) { |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1711 | int prot = pd[i].flags; |
| 1712 | |
| 1713 | pa = base | (i << TARGET_PAGE_BITS); |
| 1714 | if (prot != data->prot) { |
| 1715 | rc = walk_memory_regions_end(data, pa, prot); |
| 1716 | if (rc != 0) { |
| 1717 | return rc; |
| 1718 | } |
| 1719 | } |
| 1720 | } |
| 1721 | } else { |
| 1722 | void **pp = *lp; |
| 1723 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 1724 | for (i = 0; i < V_L2_SIZE; ++i) { |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1725 | pa = base | ((target_ulong)i << |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 1726 | (TARGET_PAGE_BITS + V_L2_BITS * level)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1727 | rc = walk_memory_regions_1(data, pa, level - 1, pp + i); |
| 1728 | if (rc != 0) { |
| 1729 | return rc; |
| 1730 | } |
| 1731 | } |
| 1732 | } |
| 1733 | |
| 1734 | return 0; |
| 1735 | } |
| 1736 | |
| 1737 | int walk_memory_regions(void *priv, walk_memory_regions_fn fn) |
| 1738 | { |
| 1739 | struct walk_memory_regions_data data; |
| 1740 | uintptr_t i; |
| 1741 | |
| 1742 | data.fn = fn; |
| 1743 | data.priv = priv; |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1744 | data.start = -1u; |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1745 | data.prot = 0; |
| 1746 | |
| 1747 | for (i = 0; i < V_L1_SIZE; i++) { |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1748 | int rc = walk_memory_regions_1(&data, (target_ulong)i << (V_L1_SHIFT + TARGET_PAGE_BITS), |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 1749 | V_L1_SHIFT / V_L2_BITS - 1, l1_map + i); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1750 | if (rc != 0) { |
| 1751 | return rc; |
| 1752 | } |
| 1753 | } |
| 1754 | |
| 1755 | return walk_memory_regions_end(&data, 0, 0); |
| 1756 | } |
| 1757 | |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1758 | static int dump_region(void *priv, target_ulong start, |
| 1759 | target_ulong end, unsigned long prot) |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1760 | { |
| 1761 | FILE *f = (FILE *)priv; |
| 1762 | |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1763 | (void) fprintf(f, TARGET_FMT_lx"-"TARGET_FMT_lx |
| 1764 | " "TARGET_FMT_lx" %c%c%c\n", |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1765 | start, end, end - start, |
| 1766 | ((prot & PAGE_READ) ? 'r' : '-'), |
| 1767 | ((prot & PAGE_WRITE) ? 'w' : '-'), |
| 1768 | ((prot & PAGE_EXEC) ? 'x' : '-')); |
| 1769 | |
| 1770 | return 0; |
| 1771 | } |
| 1772 | |
| 1773 | /* dump memory mappings */ |
| 1774 | void page_dump(FILE *f) |
| 1775 | { |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1776 | const int length = sizeof(target_ulong) * 2; |
Stefan Weil | 227b817 | 2013-09-12 20:09:06 +0200 | [diff] [blame] | 1777 | (void) fprintf(f, "%-*s %-*s %-*s %s\n", |
| 1778 | length, "start", length, "end", length, "size", "prot"); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1779 | walk_memory_regions(f, dump_region); |
| 1780 | } |
| 1781 | |
| 1782 | int page_get_flags(target_ulong address) |
| 1783 | { |
| 1784 | PageDesc *p; |
| 1785 | |
| 1786 | p = page_find(address >> TARGET_PAGE_BITS); |
| 1787 | if (!p) { |
| 1788 | return 0; |
| 1789 | } |
| 1790 | return p->flags; |
| 1791 | } |
| 1792 | |
| 1793 | /* Modify the flags of a page and invalidate the code if necessary. |
| 1794 | The flag PAGE_WRITE_ORG is positioned automatically depending |
| 1795 | on PAGE_WRITE. The mmap_lock should already be held. */ |
| 1796 | void page_set_flags(target_ulong start, target_ulong end, int flags) |
| 1797 | { |
| 1798 | target_ulong addr, len; |
| 1799 | |
| 1800 | /* This function should never be called with addresses outside the |
| 1801 | guest address space. If this assert fires, it probably indicates |
| 1802 | a missing call to h2g_valid. */ |
| 1803 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1804 | assert(end < ((target_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1805 | #endif |
| 1806 | assert(start < end); |
| 1807 | |
| 1808 | start = start & TARGET_PAGE_MASK; |
| 1809 | end = TARGET_PAGE_ALIGN(end); |
| 1810 | |
| 1811 | if (flags & PAGE_WRITE) { |
| 1812 | flags |= PAGE_WRITE_ORG; |
| 1813 | } |
| 1814 | |
| 1815 | for (addr = start, len = end - start; |
| 1816 | len != 0; |
| 1817 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
| 1818 | PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1); |
| 1819 | |
| 1820 | /* If the write protection bit is set, then we invalidate |
| 1821 | the code inside. */ |
| 1822 | if (!(p->flags & PAGE_WRITE) && |
| 1823 | (flags & PAGE_WRITE) && |
| 1824 | p->first_tb) { |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1825 | tb_invalidate_phys_page(addr, 0, NULL, false); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1826 | } |
| 1827 | p->flags = flags; |
| 1828 | } |
| 1829 | } |
| 1830 | |
| 1831 | int page_check_range(target_ulong start, target_ulong len, int flags) |
| 1832 | { |
| 1833 | PageDesc *p; |
| 1834 | target_ulong end; |
| 1835 | target_ulong addr; |
| 1836 | |
| 1837 | /* This function should never be called with addresses outside the |
| 1838 | guest address space. If this assert fires, it probably indicates |
| 1839 | a missing call to h2g_valid. */ |
| 1840 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS |
Mikhail Ilyin | 1a1c4db | 2014-09-08 17:28:56 +0400 | [diff] [blame] | 1841 | assert(start < ((target_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1842 | #endif |
| 1843 | |
| 1844 | if (len == 0) { |
| 1845 | return 0; |
| 1846 | } |
| 1847 | if (start + len - 1 < start) { |
| 1848 | /* We've wrapped around. */ |
| 1849 | return -1; |
| 1850 | } |
| 1851 | |
| 1852 | /* must do before we loose bits in the next step */ |
| 1853 | end = TARGET_PAGE_ALIGN(start + len); |
| 1854 | start = start & TARGET_PAGE_MASK; |
| 1855 | |
| 1856 | for (addr = start, len = end - start; |
| 1857 | len != 0; |
| 1858 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
| 1859 | p = page_find(addr >> TARGET_PAGE_BITS); |
| 1860 | if (!p) { |
| 1861 | return -1; |
| 1862 | } |
| 1863 | if (!(p->flags & PAGE_VALID)) { |
| 1864 | return -1; |
| 1865 | } |
| 1866 | |
| 1867 | if ((flags & PAGE_READ) && !(p->flags & PAGE_READ)) { |
| 1868 | return -1; |
| 1869 | } |
| 1870 | if (flags & PAGE_WRITE) { |
| 1871 | if (!(p->flags & PAGE_WRITE_ORG)) { |
| 1872 | return -1; |
| 1873 | } |
| 1874 | /* unprotect the page if it was put read-only because it |
| 1875 | contains translated code */ |
| 1876 | if (!(p->flags & PAGE_WRITE)) { |
| 1877 | if (!page_unprotect(addr, 0, NULL)) { |
| 1878 | return -1; |
| 1879 | } |
| 1880 | } |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1881 | } |
| 1882 | } |
| 1883 | return 0; |
| 1884 | } |
| 1885 | |
| 1886 | /* called from signal handler: invalidate the code and unprotect the |
| 1887 | page. Return TRUE if the fault was successfully handled. */ |
| 1888 | int page_unprotect(target_ulong address, uintptr_t pc, void *puc) |
| 1889 | { |
| 1890 | unsigned int prot; |
| 1891 | PageDesc *p; |
| 1892 | target_ulong host_start, host_end, addr; |
| 1893 | |
| 1894 | /* Technically this isn't safe inside a signal handler. However we |
| 1895 | know this only ever happens in a synchronous SEGV handler, so in |
| 1896 | practice it seems to be ok. */ |
| 1897 | mmap_lock(); |
| 1898 | |
| 1899 | p = page_find(address >> TARGET_PAGE_BITS); |
| 1900 | if (!p) { |
| 1901 | mmap_unlock(); |
| 1902 | return 0; |
| 1903 | } |
| 1904 | |
| 1905 | /* if the page was really writable, then we change its |
| 1906 | protection back to writable */ |
| 1907 | if ((p->flags & PAGE_WRITE_ORG) && !(p->flags & PAGE_WRITE)) { |
| 1908 | host_start = address & qemu_host_page_mask; |
| 1909 | host_end = host_start + qemu_host_page_size; |
| 1910 | |
| 1911 | prot = 0; |
| 1912 | for (addr = host_start ; addr < host_end ; addr += TARGET_PAGE_SIZE) { |
| 1913 | p = page_find(addr >> TARGET_PAGE_BITS); |
| 1914 | p->flags |= PAGE_WRITE; |
| 1915 | prot |= p->flags; |
| 1916 | |
| 1917 | /* and since the content will be modified, we must invalidate |
| 1918 | the corresponding translated code. */ |
Alexander Graf | d02532f | 2013-07-06 14:17:57 +0200 | [diff] [blame] | 1919 | tb_invalidate_phys_page(addr, pc, puc, true); |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 1920 | #ifdef DEBUG_TB_CHECK |
| 1921 | tb_invalidate_check(addr); |
| 1922 | #endif |
| 1923 | } |
| 1924 | mprotect((void *)g2h(host_start), qemu_host_page_size, |
| 1925 | prot & PAGE_BITS); |
| 1926 | |
| 1927 | mmap_unlock(); |
| 1928 | return 1; |
| 1929 | } |
| 1930 | mmap_unlock(); |
| 1931 | return 0; |
| 1932 | } |
| 1933 | #endif /* CONFIG_USER_ONLY */ |