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Rev | Author | Line No. | Line |
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145 | halyavin | 1 | /* |
2 | * TCCMEOS.C - KolibriOS/MenuetOS file output for the TinyC Compiler |
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6441 | siemargl | 3 | * |
145 | halyavin | 4 | * Copyright (c) 2006 Andrey Khalyavin |
5 | * |
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6 | * This library is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU Lesser General Public |
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8 | * License as published by the Free Software Foundation; either |
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9 | * version 2 of the License, or (at your option) any later version. |
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10 | * |
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11 | * This library is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with this library; if not, write to the Free Software |
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18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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609 | andrew_pro | 19 | */ |
20 | |||
21 | typedef struct { |
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22 | char magic[8]; |
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23 | int version; |
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24 | int entry_point; |
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25 | int image_size; |
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26 | int memory_size; |
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27 | int stack; |
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28 | int params; |
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29 | int argv; |
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30 | } IMAGE_MEOS_FILE_HEADER,*PIMAGE_MEOS_FILE_HEADER; |
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31 | typedef struct _meos_section_info{ |
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32 | int sh_addr; |
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33 | void* data; |
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34 | int data_size; |
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35 | int sec_num; |
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36 | struct _meos_section_info* next; |
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37 | } meos_section_info; |
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38 | typedef struct { |
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39 | TCCState* s1; |
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40 | IMAGE_MEOS_FILE_HEADER header; |
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41 | meos_section_info* code_sections; |
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42 | meos_section_info* data_sections; |
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43 | meos_section_info* bss_sections; |
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44 | } me_info; |
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45 | |||
6441 | siemargl | 46 | int tcc_output_dbgme(const char *filename, me_info* me); |
47 | |||
48 | |||
609 | andrew_pro | 49 | meos_section_info* findsection(me_info* me,int num) |
50 | { |
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51 | meos_section_info* si; |
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52 | for(si=me->code_sections;si;si=si->next) |
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53 | { |
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54 | if (si->sec_num==num) |
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55 | return si; |
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56 | } |
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57 | for (si=me->data_sections;si;si=si->next) |
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58 | { |
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59 | if (si->sec_num==num) |
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60 | return si; |
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61 | } |
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62 | for (si=me->bss_sections;si;si=si->next) |
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63 | { |
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64 | if (si->sec_num==num) |
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65 | return si; |
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66 | } |
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67 | return (meos_section_info*)0; |
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68 | } |
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69 | |||
70 | void build_reloc(me_info* me) |
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71 | { |
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72 | int flag; |
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6441 | siemargl | 73 | Elf32_Rel *rel = 0, *rel_ = 0, *rel_end = 0; |
609 | andrew_pro | 74 | Section *sr; |
75 | meos_section_info* s; |
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76 | meos_section_info* ss; |
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77 | s=me->code_sections; |
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78 | rel=0; |
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79 | rel_end=0; |
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80 | flag=0; |
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81 | for(;;) |
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82 | { |
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83 | sr=me->s1->sections[s->sec_num]->reloc; |
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84 | if (sr) |
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85 | { |
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145 | halyavin | 86 | rel = (Elf32_Rel *) sr->data; |
609 | andrew_pro | 87 | rel_end = (Elf32_Rel *) (sr->data + sr->data_offset); |
88 | } |
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89 | rel_=rel; |
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90 | while (rel_ |
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91 | rel=rel_; |
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92 | int type = ELF32_R_TYPE(rel->r_info); |
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93 | rel_=rel+1; |
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145 | halyavin | 94 | if (type != R_386_PC32 && type != R_386_32) |
609 | andrew_pro | 95 | continue; |
96 | int sym = ELF32_R_SYM(rel->r_info); |
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97 | if (sym>symtab_section->data_offset/sizeof(Elf32_Sym)) |
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98 | continue; |
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99 | Elf32_Sym* esym = ((Elf32_Sym *)symtab_section->data)+sym; |
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100 | int sect=esym->st_shndx; |
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101 | ss=findsection(me,sect); |
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6441 | siemargl | 102 | if (ss==0) |
6429 | siemargl | 103 | { |
104 | const char *sym_name = strtab_section->data + esym->st_name; |
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105 | tcc_error_noabort("undefined symbol '%s'", sym_name); |
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106 | continue; |
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107 | } |
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609 | andrew_pro | 108 | if (rel->r_offset>s->data_size) |
109 | continue; |
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110 | if (type==R_386_PC32) |
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111 | *(int*)(rel->r_offset+s->data)+=ss->sh_addr+esym->st_value-rel->r_offset-s->sh_addr; |
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112 | else if (type==R_386_32) |
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113 | *(int*)(rel->r_offset+s->data)+=ss->sh_addr+esym->st_value; |
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114 | } |
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115 | rel=rel_; |
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116 | s=s->next; |
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6441 | siemargl | 117 | if (s==0) // what about multiple BSS sections ? |
609 | andrew_pro | 118 | { |
119 | if (flag) break; |
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120 | s=me->data_sections; |
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121 | if (s==0) break; |
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122 | flag=1; |
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123 | continue; |
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124 | } |
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125 | } |
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126 | } |
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127 | |||
128 | void assign_addresses(me_info* me) |
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129 | { |
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130 | int i; |
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131 | meos_section_info* si; |
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132 | for (i=1;i |
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133 | { |
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134 | Section* s=me->s1->sections[i]; |
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135 | if (strcmp(".text",s->name)==0) |
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136 | { |
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137 | si=tcc_malloc(sizeof(meos_section_info)); |
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138 | si->data=s->data; |
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139 | si->data_size=s->data_offset; |
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140 | si->next=me->code_sections; |
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141 | si->sec_num=i; |
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142 | me->code_sections=si; |
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143 | continue; |
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144 | } |
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145 | if (strcmp(".data",s->name)==0) |
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146 | { |
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147 | si=tcc_malloc(sizeof(meos_section_info)); |
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148 | si->data=s->data; |
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149 | si->data_size=s->data_offset; |
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150 | si->next=me->data_sections; |
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151 | si->sec_num=i; |
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152 | me->data_sections=si; |
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153 | continue; |
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154 | } |
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155 | if (strcmp(".bss",s->name)==0) |
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156 | { |
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157 | si=tcc_malloc(sizeof(meos_section_info)); |
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6441 | siemargl | 158 | si->data=s->data; |
609 | andrew_pro | 159 | si->data_size=s->data_offset; |
160 | si->next=me->bss_sections; |
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161 | si->sec_num=i; |
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162 | me->bss_sections=si; |
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163 | continue; |
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164 | } |
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165 | } |
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166 | int addr; |
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167 | addr=sizeof(IMAGE_MEOS_FILE_HEADER); |
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168 | for (si=me->code_sections;si;si=si->next) |
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169 | { |
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170 | si->sh_addr=addr; |
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171 | addr+=si->data_size; |
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172 | } |
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173 | for (si=me->data_sections;si;si=si->next) |
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174 | { |
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175 | si->sh_addr=addr; |
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176 | addr+=si->data_size; |
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177 | } |
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178 | me->header.image_size=addr; |
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179 | for (si=me->bss_sections;si;si=si->next) |
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180 | { |
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181 | si->sh_addr=addr; |
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182 | addr+=si->data_size; |
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6441 | siemargl | 183 | } |
184 | if (me->s1->pe_stack_size < 4096) |
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185 | addr+=4096; |
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186 | else |
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187 | addr += me->s1->pe_stack_size; |
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609 | andrew_pro | 188 | addr=(addr+4)&(~3); |
189 | me->header.stack=addr; |
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190 | me->header.memory_size=addr; |
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191 | build_reloc(me); |
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192 | } |
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6429 | siemargl | 193 | |
194 | |||
6441 | siemargl | 195 | const char *tcc_get_symbol_name(int st_name) |
6429 | siemargl | 196 | // return string by index from stringtable section |
197 | { |
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198 | const char *sym_name = strtab_section->data + st_name; |
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199 | return sym_name; |
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200 | } |
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201 | |||
609 | andrew_pro | 202 | int tcc_find_symbol_me(me_info* me, const char *sym_name) |
203 | { |
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204 | int i; |
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205 | int symtab; |
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206 | int strtab; |
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207 | symtab=0; |
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208 | strtab=0; |
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209 | for (i=1;i |
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210 | { |
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211 | Section* s; |
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212 | s=me->s1->sections[i]; |
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213 | if (strcmp(s->name,".symtab")==0) |
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214 | { |
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215 | symtab=i; |
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216 | } |
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217 | if (strcmp(s->name,".strtab")==0) |
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218 | { |
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219 | strtab=i; |
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220 | } |
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221 | } |
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222 | if (symtab==0 || strtab==0) |
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6429 | siemargl | 223 | { |
224 | tcc_error_noabort("undefined sections .symtab or .strtab on linking '%s'", sym_name); |
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609 | andrew_pro | 225 | return 0; |
6429 | siemargl | 226 | } |
609 | andrew_pro | 227 | Elf32_Sym* s,*se; |
228 | char* name; |
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229 | s=(Elf32_Sym*)me->s1->sections[symtab]->data; |
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230 | se=(Elf32_Sym*)(((void*)s)+me->s1->sections[symtab]->data_offset); |
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231 | name=(char*)me->s1->sections[strtab]->data; |
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232 | while (s |
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233 | { |
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234 | if (strcmp(name+s->st_name,sym_name)==0) |
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235 | { |
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236 | return s->st_value+findsection(me,s->st_shndx)->sh_addr; |
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237 | } |
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238 | s++; |
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239 | } |
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6429 | siemargl | 240 | tcc_error_noabort("undefined symbol '%s'", sym_name); |
609 | andrew_pro | 241 | return 0; |
242 | } |
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6429 | siemargl | 243 | |
609 | andrew_pro | 244 | const char* me_magic="MENUET01"; |
245 | int tcc_output_me(TCCState* s1,const char *filename) |
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246 | { |
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247 | me_info me; |
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248 | int i; |
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249 | FILE* f; |
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250 | //printf("%d\n",s1->nb_sections); |
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251 | memset(&me,0,sizeof(me)); |
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252 | me.s1=s1; |
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253 | relocate_common_syms(); |
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254 | assign_addresses(&me); |
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6441 | siemargl | 255 | |
256 | if (s1->do_debug) |
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257 | tcc_output_dbgme(filename, &me); |
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258 | |||
609 | andrew_pro | 259 | me.header.entry_point=tcc_find_symbol_me(&me,"start"); |
260 | me.header.params= tcc_find_symbol_me(&me,"__argv"); // <-- |
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261 | me.header.argv= tcc_find_symbol_me(&me,"__path"); // <-- |
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6441 | siemargl | 262 | |
609 | andrew_pro | 263 | f=fopen(filename,"wb"); |
264 | for (i=0;i<8;i++) |
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265 | me.header.magic[i]=me_magic[i]; |
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266 | /*me.header.magic[0]='M';me.header.magic[1]='E'; |
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267 | me.header.magic[2]='N';me.header.magic[3]='U'; |
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268 | me.header.magic[4]='E';me.header.magic[5]='T'; |
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269 | me.header.magic[6]='0';me.header.magic[7]='1';*/ |
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270 | fwrite(&me.header,1,sizeof(IMAGE_MEOS_FILE_HEADER),f); |
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271 | meos_section_info* si; |
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272 | for(si=me.code_sections;si;si=si->next) |
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273 | fwrite(si->data,1,si->data_size,f); |
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274 | for (si=me.data_sections;si;si=si->next) |
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6441 | siemargl | 275 | fwrite(si->data,1,si->data_size,f); |
276 | for (si=me.bss_sections;si;si=si->next) |
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6858 | siemargl | 277 | { |
278 | if (si->data == NULL) |
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279 | { |
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280 | // printf("\nError! BSS data is NULL! size:%i",(int)si->data_size); |
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281 | si->data = calloc(si->data_size, 1); |
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282 | } |
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283 | fwrite(si->data, 1, si->data_size, f); |
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284 | } |
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6441 | siemargl | 285 | /* |
286 | if (me.bss_sections) // Siemargl testin, what we lose |
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287 | { |
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288 | tcc_error_noabort("We lose .BSS section when linking KOS32 executable"); |
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289 | } |
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290 | */ |
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609 | andrew_pro | 291 | fclose(f); |
292 | return 0; |
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293 | } |
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6429 | siemargl | 294 | |
295 | #ifndef _WIN32 |
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296 | |||
297 | static inline int get_current_folder(char* buf, int bufsize){ |
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298 | register int val; |
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299 | asm volatile ("int $0x40":"=a"(val):"a"(30), "b"(2), "c"(buf), "d"(bufsize)); |
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300 | return val; |
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301 | } |
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302 | |||
303 | |||
304 | char *getcwd(char *buf, size_t size) |
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305 | { |
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306 | int rc = get_current_folder(buf, size); |
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307 | if (rc > size) |
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308 | { |
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309 | errno = ERANGE; |
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310 | return 0; |
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311 | } |
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312 | else |
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313 | return buf; |
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314 | } |
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315 | |||
316 | #endif |
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6441 | siemargl | 317 | |
318 | |||
319 | static FILE *src_file; |
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320 | static int next_src_line; |
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321 | |||
322 | void close_source_file() |
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323 | { |
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324 | if (src_file) |
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325 | fclose(src_file); |
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326 | src_file = NULL; |
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327 | } |
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328 | |||
329 | void load_source_file(char *fname) |
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330 | { |
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331 | close_source_file(); |
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332 | src_file = fopen(fname,"rt"); |
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333 | if (!src_file) return; |
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334 | next_src_line = 1; |
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335 | } |
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336 | |||
337 | int get_src_lines(char *buf, int sz, int start, int end) |
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338 | // 1 if read |
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339 | { |
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340 | char line[255], *ch; |
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341 | strcpy(buf, ""); |
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342 | if (!src_file) return 0; |
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343 | while (next_src_line < start) // skip |
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344 | { |
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345 | ch = fgets(line, sizeof line, src_file); |
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346 | if (!ch) return 0; |
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347 | next_src_line++; |
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348 | } |
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349 | while (next_src_line <= end) |
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350 | { |
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351 | ch = fgets(line, sizeof line, src_file); |
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352 | if (!ch) return 0; |
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353 | next_src_line++; |
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354 | strncat(buf, line, sz - strlen(buf) - 1); |
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355 | } |
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356 | // remove newlines |
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357 | for (ch = buf; *ch; ch++) |
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358 | if (strchr("\t\n\r", *ch)) *ch = ' '; |
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359 | |||
360 | return 1; |
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361 | } |
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362 | |||
363 | int tcc_output_dbgme(const char *filename, me_info* me) |
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364 | // by Siemargl. Writes filename.dbg file for source code level debuggin with MTDBG |
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365 | // return 1 on error |
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366 | { |
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367 | FILE *fdbg; |
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6443 | siemargl | 368 | char fname[400], |
369 | buf[80]; // no more fits in mtdbg string |
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6441 | siemargl | 370 | |
371 | strcpy(fname, filename); |
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372 | strcat(fname, ".dbg"); |
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373 | fdbg = fopen(fname,"wt"); |
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374 | if (!fdbg) return 1; |
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375 | |||
376 | meos_section_info *si, *ss; |
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377 | fputs(".text\n", fdbg); // just for mtbg |
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378 | |||
379 | // print symbol table with resolved addresses |
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380 | Elf32_Sym* esym; |
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381 | for (esym = (Elf32_Sym*)symtab_section->data; esym <= (Elf32_Sym*)(symtab_section->data + symtab_section->data_offset); esym++) |
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382 | { |
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383 | if (esym->st_info == 0 || esym->st_info == 4) continue; |
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384 | int sect = esym->st_shndx; |
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385 | ss = findsection(me, sect); |
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386 | const char *sym_name = strtab_section->data + esym->st_name; |
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387 | if (ss == 0) |
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388 | { |
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389 | fprintf(fdbg, "undefined symbol '%s' type(%d)\n", sym_name, esym->st_info); |
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390 | continue; |
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391 | } |
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392 | fprintf(fdbg, "0x%X %s\n", ss->sh_addr + esym->st_value, sym_name); // removed type(%d) esym->st_info |
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393 | } |
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394 | |||
395 | fputs(".text source code links\n", fdbg); // just for mtbg |
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396 | // print symbol table with resolved addresses |
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397 | Stab_Sym *stab; |
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398 | char *str = "", *cur_file = "???", cur_fun[255]; |
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399 | int cur_line = 0, cur_fun_addr = 0, fun_flag = 0; |
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400 | strcpy(cur_fun, "fn???"); |
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401 | for (stab = (Stab_Sym*)stab_section->data; stab <= (Stab_Sym*)(stab_section->data + stab_section->data_offset); stab++) |
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402 | { |
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403 | str = ""; |
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404 | switch(stab->n_type) |
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405 | { |
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406 | case 100: // source file, or path |
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407 | if (stab->n_strx) |
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408 | { |
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409 | cur_file = stabstr_section->data + stab->n_strx; |
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410 | load_source_file(cur_file); |
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411 | } |
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412 | else |
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413 | cur_file = "???"; |
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414 | strcpy(cur_fun, "fn???"); |
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415 | cur_line = 0; |
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416 | cur_fun_addr = 0; |
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417 | fun_flag = 0; |
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418 | break; |
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419 | case 36: // func |
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420 | cur_fun_addr = 0; |
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421 | if (stab->n_strx) |
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422 | { |
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423 | strcpy(cur_fun, stabstr_section->data + stab->n_strx); |
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424 | str = strchr(cur_fun, ':'); |
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425 | if (str) *str = '\0'; |
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426 | cur_fun_addr = tcc_find_symbol_me(me, cur_fun); |
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427 | cur_line = stab->n_desc; |
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428 | fun_flag = 1; |
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429 | //fprintf(fdbg, "0x%X %s() line(%d)\n", cur_fun_addr, cur_fun, cur_line); // commented as conflicted with direct address |
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430 | } |
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431 | else |
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432 | strcpy(cur_fun, "fn???"); |
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433 | break; |
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434 | case 68: // N_SLINE |
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435 | if (stab->n_value == 0 ) continue; // skip zero offset line |
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436 | if (fun_flag) // skip string {, as duplicates address |
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437 | { |
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438 | fun_flag = 0; |
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439 | continue; |
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440 | } |
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441 | |||
442 | int line; |
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443 | if (stab->n_desc > cur_line) |
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444 | line = cur_line + 1; |
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445 | else |
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446 | line = cur_line; |
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447 | //fprintf(fdbg, "0x%X LINES %d-%d \n", cur_fun_addr + stab->n_value, line, stab->n_desc); |
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448 | if (get_src_lines(buf, sizeof buf, line, stab->n_desc)) |
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449 | fprintf(fdbg, "0x%X %s\n", cur_fun_addr + stab->n_value, buf); |
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450 | |||
451 | cur_line = stab->n_desc; |
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452 | break; |
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453 | default: |
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454 | continue; |
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455 | } |
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456 | /* |
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457 | if (stab->n_strx) |
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458 | str = stabstr_section->data + stab->n_strx; |
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459 | fprintf(fdbg, "0x%X type(%d) str(%s) desc(%d)\n", stab->n_value, stab->n_type, str, stab->n_desc); |
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460 | */ |
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461 | } |
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462 | |||
463 | /* for(; si; si = si->next) |
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464 | { |
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465 | Section *sr; |
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466 | Elf32_Rel *rel, *rel_end; |
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467 | for(sr = me->s1->sections[si->sec_num]->reloc; sr; ) |
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468 | { |
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469 | for (rel = (Elf32_Rel *) sr->data, rel_end = (Elf32_Rel *) (sr->data + sr->data_offset); rel < rel_end; rel++) |
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470 | { |
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471 | int type = ELF32_R_TYPE(rel->r_info); |
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472 | if (type != R_386_PC32 && type != R_386_32) |
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473 | continue; |
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474 | int sym = ELF32_R_SYM(rel->r_info); |
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475 | if (sym > symtab_section->data_offset / sizeof(Elf32_Sym)) |
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476 | continue; |
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477 | Elf32_Sym* esym = ((Elf32_Sym*)symtab_section->data) + sym; |
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478 | int sect = esym->st_shndx; |
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479 | ss = findsection(me, sect); |
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480 | const char *sym_name = strtab_section->data + esym->st_name; |
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481 | if (ss == 0) |
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482 | { |
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483 | fprintf(fdbg, "undefined symbol '%s'\n", sym_name); |
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484 | continue; |
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485 | } |
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486 | if (rel->r_offset > si->data_size) continue; |
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487 | fprintf(fdbg, "\t0x%X %s\n", ss->sh_addr + esym->st_value, sym_name); |
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488 | } |
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489 | } |
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490 | } |
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491 | */ |
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492 | close_source_file(); |
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493 | fclose(fdbg); |
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494 | return 0; |
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495 | }>=>=>=>>8;i++) |