| 1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| 2 | * Mupen64plus - assemble.c * |
| 3 | * Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ * |
| 4 | * Copyright (C) 2002 Hacktarux * |
| 5 | * * |
| 6 | * This program is free software; you can redistribute it and/or modify * |
| 7 | * it under the terms of the GNU General Public License as published by * |
| 8 | * the Free Software Foundation; either version 2 of the License, or * |
| 9 | * (at your option) any later version. * |
| 10 | * * |
| 11 | * This program 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 * |
| 14 | * GNU General Public License for more details. * |
| 15 | * * |
| 16 | * You should have received a copy of the GNU General Public License * |
| 17 | * along with this program; if not, write to the * |
| 18 | * Free Software Foundation, Inc., * |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * |
| 20 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
| 21 | |
| 22 | #include <stdlib.h> |
| 23 | #include <stdio.h> |
| 24 | |
| 25 | #include "assemble.h" |
| 26 | |
| 27 | #include "api/m64p_types.h" |
| 28 | #include "api/callbacks.h" |
| 29 | #include "osal/preproc.h" |
| 30 | #include "r4300/recomph.h" |
| 31 | #include "r4300/recomp.h" |
| 32 | #include "r4300/r4300.h" |
| 33 | |
| 34 | typedef struct _jump_table |
| 35 | { |
| 36 | unsigned int mi_addr; |
| 37 | unsigned int pc_addr; |
| 38 | } jump_table; |
| 39 | |
| 40 | static jump_table *jumps_table = NULL; |
| 41 | static int jumps_number, max_jumps_number; |
| 42 | |
| 43 | void init_assembler(void *block_jumps_table, int block_jumps_number, void *block_riprel_table, int block_riprel_number) |
| 44 | { |
| 45 | if (block_jumps_table) |
| 46 | { |
| 47 | jumps_table = (jump_table *) block_jumps_table; |
| 48 | jumps_number = block_jumps_number; |
| 49 | max_jumps_number = jumps_number; |
| 50 | } |
| 51 | else |
| 52 | { |
| 53 | jumps_table = (jump_table *) malloc(1000*sizeof(jump_table)); |
| 54 | jumps_number = 0; |
| 55 | max_jumps_number = 1000; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | void free_assembler(void **block_jumps_table, int *block_jumps_number, void **block_riprel_table, int *block_riprel_number) |
| 60 | { |
| 61 | *block_jumps_table = jumps_table; |
| 62 | *block_jumps_number = jumps_number; |
| 63 | *block_riprel_table = NULL; /* RIP-relative addressing is only for x86-64 */ |
| 64 | *block_riprel_number = 0; |
| 65 | } |
| 66 | |
| 67 | void add_jump(unsigned int pc_addr, unsigned int mi_addr) |
| 68 | { |
| 69 | if (jumps_number == max_jumps_number) |
| 70 | { |
| 71 | max_jumps_number += 1000; |
| 72 | jumps_table = (jump_table *) realloc(jumps_table, max_jumps_number*sizeof(jump_table)); |
| 73 | } |
| 74 | jumps_table[jumps_number].pc_addr = pc_addr; |
| 75 | jumps_table[jumps_number].mi_addr = mi_addr; |
| 76 | jumps_number++; |
| 77 | } |
| 78 | |
| 79 | void passe2(precomp_instr *dest, int start, int end, precomp_block *block) |
| 80 | { |
| 81 | unsigned int real_code_length, addr_dest; |
| 82 | int i; |
| 83 | build_wrappers(dest, start, end, block); |
| 84 | real_code_length = code_length; |
| 85 | |
| 86 | for (i=0; i < jumps_number; i++) |
| 87 | { |
| 88 | code_length = jumps_table[i].pc_addr; |
| 89 | if (dest[(jumps_table[i].mi_addr - dest[0].addr)/4].reg_cache_infos.need_map) |
| 90 | { |
| 91 | addr_dest = (unsigned int)dest[(jumps_table[i].mi_addr - dest[0].addr)/4].reg_cache_infos.jump_wrapper; |
| 92 | put32(addr_dest-((unsigned int)block->code+code_length)-4); |
| 93 | } |
| 94 | else |
| 95 | { |
| 96 | addr_dest = dest[(jumps_table[i].mi_addr - dest[0].addr)/4].local_addr; |
| 97 | put32(addr_dest-code_length-4); |
| 98 | } |
| 99 | } |
| 100 | code_length = real_code_length; |
| 101 | } |
| 102 | |
| 103 | static unsigned int g_jump_start8 = 0; |
| 104 | static unsigned int g_jump_start32 = 0; |
| 105 | |
| 106 | void jump_start_rel8(void) |
| 107 | { |
| 108 | g_jump_start8 = code_length; |
| 109 | } |
| 110 | |
| 111 | void jump_start_rel32(void) |
| 112 | { |
| 113 | g_jump_start32 = code_length; |
| 114 | } |
| 115 | |
| 116 | void jump_end_rel8(void) |
| 117 | { |
| 118 | unsigned int jump_end = code_length; |
| 119 | int jump_vec = jump_end - g_jump_start8; |
| 120 | |
| 121 | if (jump_vec > 127 || jump_vec < -128) |
| 122 | { |
| 123 | DebugMessage(M64MSG_ERROR, "8-bit relative jump too long! From %x to %x", g_jump_start8, jump_end); |
| 124 | OSAL_BREAKPOINT_INTERRUPT; |
| 125 | } |
| 126 | |
| 127 | code_length = g_jump_start8 - 1; |
| 128 | put8(jump_vec); |
| 129 | code_length = jump_end; |
| 130 | } |
| 131 | |
| 132 | void jump_end_rel32(void) |
| 133 | { |
| 134 | unsigned int jump_end = code_length; |
| 135 | int jump_vec = jump_end - g_jump_start32; |
| 136 | |
| 137 | code_length = g_jump_start32 - 4; |
| 138 | put32(jump_vec); |
| 139 | code_length = jump_end; |
| 140 | } |