2 // ELFManager.cpp: ELF format manager
6 // JPM = Jean-Paul Mari <djipi.mari@gmail.com>
7 // RG = Richard Goedeken
10 // --- ---------- ------------------------------------------------------------
11 // JPM Jan./2016 Created this file and added ELF format support
12 // JPM 07/13/2017 ELF DWARF format support improvement
13 // JPM 10/20/2018 Added function name support from ELF structure
14 // JPM 03/13/2020 Added ELF & DWARF .debug* types
15 // RG Jan./2021 Linux build fixes
20 #include <sys/types.h>
26 #include "ELFManager.h"
27 #include "DWARFManager.h"
30 //#define LOG_SUPPORT // Support log
34 const char *SectionName
;
49 ELFSectionType ELFTabSectionType
[] = {
50 { "", ELF_NULL_TYPE
},
51 { ".text", ELF_text_TYPE
},
52 { ".rodata", ELF_rodata_TYPE
},
53 { ".data", ELF_data_TYPE
},
54 { ".bss", ELF_bss_TYPE
},
55 { ".heap", ELF_heap_TYPE
},
56 { ".debug", ELF_debug_TYPE
},
57 { ".comment", ELF_comment_TYPE
},
58 { ".shstrtab", ELF_shstrtab_TYPE
},
59 { ".symtab", ELF_symtab_TYPE
},
60 { ".strtab", ELF_strtab_TYPE
},
61 { ".debug_abbrev", ELF_debug_abbrev_TYPE
},
62 { ".debug_aranges", ELF_debug_aranges_TYPE
},
63 { ".debug_frame", ELF_debug_frame_TYPE
},
64 { ".debug_info", ELF_debug_info_TYPE
},
65 { ".debug_line", ELF_debug_line_TYPE
},
66 { ".debug_loc", ELF_debug_loc_TYPE
},
67 { ".debug_macinfo", ELF_debug_macinfo_TYPE
},
68 { ".debug_pubnames", ELF_debug_pubnames_TYPE
},
69 { ".debug_pubtypes", ELF_debug_pubtypes_TYPE
},
70 { ".debug_ranges", ELF_debug_ranges_TYPE
},
71 { ".debug_str", ELF_debug_str_TYPE
},
72 { ".debug_types", ELF_debug_types_TYPE
}
78 void *PtrExec
; // ELF executable
80 // ELF Dwarf management
84 size_t NbELFtabStruct
;
88 char *ELFManager_GetSymbolnameFromSymbolindex(size_t Index
);
91 // ELF section type detection
92 size_t ELFManager_GetSectionType(char *SectionName
)
96 for (i
= 0; i
< ELF_END_TYPE
; i
++)
98 if (!strcmp(ELFTabSectionType
[i
].SectionName
, SectionName
))
100 return (ELFTabSectionType
[i
].SectionType
);
104 return (size_t)ELF_NO_TYPE
;
108 // ELF manager executable copy
109 void *ELFManager_ExeCopy(void *src
, size_t size
)
111 if ((PtrExec
= malloc(size
)) != NULL
)
113 memcpy(PtrExec
, src
, size
);
120 Elf
*ELFManager_MemOpen(char *PtrELFExe
, size_t Size
)
122 return(ElfMem
= elf_memory(PtrELFExe
, Size
));
126 int ELFManager_MemEnd(void)
132 err
= elf_end(ElfMem
);
140 // ELF manager Initialisation
141 void ELFManager_Init(void)
151 // ELF manager Dwarf Initialisation
152 bool ELFManager_DwarfInit(Elf
*PtrElfMem
, struct stat FileElfInfo
)
154 return (ElfDwarf
= (DWARFManager_ElfInit(PtrElfMem
, FileElfInfo
) == DW_DLV_OK
) ? true : false);
159 void ELFManager_Reset(void)
163 DWARFManager_Reset();
175 while (NbELFtabStruct
)
177 free(ELFtab
[--NbELFtabStruct
]);
188 // ELF manager Closing
189 void ELFManager_Close(void)
195 // Save the ELF tab in memory
196 bool ELFManager_AddTab(void *Ptr
, size_t type
)
200 if ((ELFtab
= (ELFTab
**)calloc(1, sizeof(ELFTab
*))) == NULL
)
207 if ((ELFtab
= (ELFTab
**)realloc(ELFtab
, sizeof(ELFTab
*)*(NbELFtabStruct
+1))) == NULL
)
213 if ((ELFtab
[NbELFtabStruct
] = (ELFTab
*)calloc(1, sizeof(ELFTab
))) == NULL
)
219 ELFtab
[NbELFtabStruct
]->Type
= type
;
220 ELFtab
[NbELFtabStruct
]->PtrTab
= Ptr
;
227 // Get Address from his Symbol Name
228 // Return 0 if Symbol name is not found
229 size_t ELFManager_GetAdrFromSymbolName(char *SymbolName
)
234 if (ELFtab
&& SymbolName
)
236 for (size_t i
= 0; i
< NbELFtabStruct
; i
++)
238 if ((ELFtab
[i
]->Type
== ELF_symtab_TYPE
) && ((ELFtab
[i
]->PtrDataTab
) != NULL
))
242 while ((PtrST
= gelf_getsym(ELFtab
[i
]->PtrDataTab
, j
++, &ST
)) != NULL
)
244 if (!strcmp(ELFManager_GetSymbolnameFromSymbolindex(PtrST
->st_name
), SymbolName
))
246 Adr
= PtrST
->st_value
;
257 // Get function name from his address
258 // Return NULL if function name is not found
259 char *ELFManager_GetFunctionName(size_t Adr
)
261 char *SymbolName
= NULL
;
266 for (size_t i
= 0; i
< NbELFtabStruct
; i
++)
268 if ((ELFtab
[i
]->Type
== ELF_symtab_TYPE
) && ((ELFtab
[i
]->PtrDataTab
) != NULL
))
272 while ((PtrST
= gelf_getsym(ELFtab
[i
]->PtrDataTab
, j
++, &ST
)) != NULL
)
274 if (PtrST
->st_value
== Adr
)
276 if (ELF32_ST_TYPE(PtrST
->st_info
) == STT_FUNC
)
278 SymbolName
= ELFManager_GetSymbolnameFromSymbolindex(PtrST
->st_name
);
290 // Get Symbol name from his address
291 // Return NULL if Symbol name is not found
292 char *ELFManager_GetSymbolnameFromAdr(size_t Adr
)
294 char *SymbolName
= NULL
;
299 for (size_t i
= 0; i
< NbELFtabStruct
; i
++)
301 if ((ELFtab
[i
]->Type
== ELF_symtab_TYPE
) && ((ELFtab
[i
]->PtrDataTab
) != NULL
))
305 while ((PtrST
= gelf_getsym(ELFtab
[i
]->PtrDataTab
, j
++, &ST
)) != NULL
)
307 if (PtrST
->st_value
== Adr
)
310 WriteLog("ELF: .symtab: DATA: st_info=%0x, st_name=%0x, st_other=%0x, st_shndx=%0x, st_size=%0x, st_value=%0x\n", PtrST
->st_info
, PtrST
->st_name
, PtrST
->st_other
, PtrST
->st_shndx
, PtrST
->st_size
, PtrST
->st_value
);
312 SymbolName
= ELFManager_GetSymbolnameFromSymbolindex(PtrST
->st_name
);
323 // Get Symbol name from his Symbol index
324 char *ELFManager_GetSymbolnameFromSymbolindex(size_t Index
)
328 for (size_t i
= 0; i
< NbELFtabStruct
; i
++)
330 if ((ELFtab
[i
]->Type
== ELF_strtab_TYPE
) && ((ELFtab
[i
]->PtrDataTab
) != NULL
))
332 return ((char *)(ELFtab
[i
]->PtrDataTab
->d_buf
) + Index
);