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1 | /* |
2 | * Host code generation | |
3 | * | |
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 | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | #include <stdarg.h> | |
21 | #include <stdlib.h> | |
22 | #include <stdio.h> | |
23 | #include <string.h> | |
24 | #include <inttypes.h> | |
25 | ||
26 | #include "config.h" | |
27 | #define IN_OP_I386 | |
28 | #include "cpu-" TARGET_ARCH ".h" | |
29 | #include "exec.h" | |
30 | #include "disas.h" | |
31 | ||
32 | enum { | |
33 | #define DEF(s, n, copy_size) INDEX_op_ ## s, | |
34 | #include "opc-" TARGET_ARCH ".h" | |
35 | #undef DEF | |
36 | NB_OPS, | |
37 | }; | |
38 | ||
39 | #include "dyngen.h" | |
40 | #include "op-" TARGET_ARCH ".h" | |
41 | ||
42 | uint16_t gen_opc_buf[OPC_BUF_SIZE]; | |
43 | uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE]; | |
44 | uint32_t gen_opc_pc[OPC_BUF_SIZE]; | |
45 | uint8_t gen_opc_instr_start[OPC_BUF_SIZE]; | |
46 | ||
47 | ||
48 | #ifdef DEBUG_DISAS | |
49 | static const char *op_str[] = { | |
50 | #define DEF(s, n, copy_size) #s, | |
51 | #include "opc-" TARGET_ARCH ".h" | |
52 | #undef DEF | |
53 | }; | |
54 | ||
55 | static uint8_t op_nb_args[] = { | |
56 | #define DEF(s, n, copy_size) n, | |
57 | #include "opc-" TARGET_ARCH ".h" | |
58 | #undef DEF | |
59 | }; | |
60 | ||
61 | void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf) | |
62 | { | |
63 | const uint16_t *opc_ptr; | |
64 | const uint32_t *opparam_ptr; | |
65 | int c, n, i; | |
66 | ||
67 | opc_ptr = opc_buf; | |
68 | opparam_ptr = opparam_buf; | |
69 | for(;;) { | |
70 | c = *opc_ptr++; | |
71 | n = op_nb_args[c]; | |
72 | fprintf(logfile, "0x%04x: %s", | |
73 | (int)(opc_ptr - opc_buf - 1), op_str[c]); | |
74 | for(i = 0; i < n; i++) { | |
75 | fprintf(logfile, " 0x%x", opparam_ptr[i]); | |
76 | } | |
77 | fprintf(logfile, "\n"); | |
78 | if (c == INDEX_op_end) | |
79 | break; | |
80 | opparam_ptr += n; | |
81 | } | |
82 | } | |
83 | ||
84 | #endif | |
85 | ||
86 | /* return non zero if the very first instruction is invalid so that | |
87 | the virtual CPU can trigger an exception. | |
88 | ||
89 | '*gen_code_size_ptr' contains the size of the generated code (host | |
90 | code). | |
91 | */ | |
92 | int cpu_gen_code(TranslationBlock *tb, | |
93 | int max_code_size, int *gen_code_size_ptr) | |
94 | { | |
95 | uint8_t *gen_code_buf; | |
96 | int gen_code_size; | |
97 | ||
98 | if (gen_intermediate_code(tb, 0) < 0) | |
99 | return -1; | |
100 | ||
101 | /* generate machine code */ | |
102 | tb->tb_next_offset[0] = 0xffff; | |
103 | tb->tb_next_offset[1] = 0xffff; | |
104 | gen_code_buf = tb->tc_ptr; | |
105 | gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset, | |
106 | #ifdef USE_DIRECT_JUMP | |
107 | tb->tb_jmp_offset, | |
108 | #else | |
109 | NULL, | |
110 | #endif | |
111 | gen_opc_buf, gen_opparam_buf); | |
112 | *gen_code_size_ptr = gen_code_size; | |
113 | #ifdef DEBUG_DISAS | |
114 | if (loglevel) { | |
115 | fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr); | |
116 | disas(logfile, gen_code_buf, *gen_code_size_ptr, 1, 0); | |
117 | fprintf(logfile, "\n"); | |
118 | fflush(logfile); | |
119 | } | |
120 | #endif | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static const unsigned short opc_copy_size[] = { | |
125 | #define DEF(s, n, copy_size) copy_size, | |
126 | #include "opc-i386.h" | |
127 | #undef DEF | |
128 | }; | |
129 | ||
130 | /* The simulated PC corresponding to | |
131 | 'searched_pc' in the generated code is searched. 0 is returned if | |
132 | found. *found_pc contains the found PC. | |
133 | */ | |
134 | int cpu_search_pc(TranslationBlock *tb, | |
135 | uint32_t *found_pc, unsigned long searched_pc) | |
136 | { | |
137 | int j, c; | |
138 | unsigned long tc_ptr; | |
139 | uint16_t *opc_ptr; | |
140 | ||
141 | if (gen_intermediate_code(tb, 1) < 0) | |
142 | return -1; | |
143 | ||
144 | /* find opc index corresponding to search_pc */ | |
145 | tc_ptr = (unsigned long)tb->tc_ptr; | |
146 | if (searched_pc < tc_ptr) | |
147 | return -1; | |
148 | j = 0; | |
149 | opc_ptr = gen_opc_buf; | |
150 | for(;;) { | |
151 | c = *opc_ptr; | |
152 | if (c == INDEX_op_end) | |
153 | return -1; | |
154 | tc_ptr += opc_copy_size[c]; | |
155 | if (searched_pc < tc_ptr) | |
156 | break; | |
157 | opc_ptr++; | |
158 | } | |
159 | j = opc_ptr - gen_opc_buf; | |
160 | /* now find start of instruction before */ | |
161 | while (gen_opc_instr_start[j] == 0) | |
162 | j--; | |
163 | *found_pc = gen_opc_pc[j]; | |
164 | return 0; | |
165 | } | |
166 | ||
167 |