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comparison src/share/vm/utilities/elfSymbolTable.cpp @ 14441:e7cbc95179c4

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8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables Summary: Extend ELF-decoder to support PPC64 function descriptor tables Reviewed-by: kvn, zgu
author simonis
date Thu, 05 Dec 2013 19:19:09 +0100
parents b9a9ed0f8eeb
children 4ca6dc0799b6
comparison
equal deleted inserted replaced
14440:41b780b43b74 14441:e7cbc95179c4
1 /* 1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
25 #include "precompiled.hpp" 25 #include "precompiled.hpp"
26 26
27 #if !defined(_WINDOWS) && !defined(__APPLE__) 27 #if !defined(_WINDOWS) && !defined(__APPLE__)
28 28
29 #include "memory/allocation.inline.hpp" 29 #include "memory/allocation.inline.hpp"
30 #include "utilities/elfFuncDescTable.hpp"
30 #include "utilities/elfSymbolTable.hpp" 31 #include "utilities/elfSymbolTable.hpp"
31 32
32 ElfSymbolTable::ElfSymbolTable(FILE* file, Elf_Shdr shdr) { 33 ElfSymbolTable::ElfSymbolTable(FILE* file, Elf_Shdr shdr) {
33 assert(file, "null file handle"); 34 assert(file, "null file handle");
34 m_symbols = NULL; 35 m_symbols = NULL;
66 if (m_next != NULL) { 67 if (m_next != NULL) {
67 delete m_next; 68 delete m_next;
68 } 69 }
69 } 70 }
70 71
71 bool ElfSymbolTable::lookup(address addr, int* stringtableIndex, int* posIndex, int* offset) { 72 bool ElfSymbolTable::lookup(address addr, int* stringtableIndex, int* posIndex, int* offset, ElfFuncDescTable* funcDescTable) {
72 assert(stringtableIndex, "null string table index pointer"); 73 assert(stringtableIndex, "null string table index pointer");
73 assert(posIndex, "null string table offset pointer"); 74 assert(posIndex, "null string table offset pointer");
74 assert(offset, "null offset pointer"); 75 assert(offset, "null offset pointer");
75 76
76 if (NullDecoder::is_error(m_status)) { 77 if (NullDecoder::is_error(m_status)) {
77 return false; 78 return false;
78 } 79 }
79 80
80 address pc = 0;
81 size_t sym_size = sizeof(Elf_Sym); 81 size_t sym_size = sizeof(Elf_Sym);
82 assert((m_shdr.sh_size % sym_size) == 0, "check size"); 82 assert((m_shdr.sh_size % sym_size) == 0, "check size");
83 int count = m_shdr.sh_size / sym_size; 83 int count = m_shdr.sh_size / sym_size;
84 if (m_symbols != NULL) { 84 if (m_symbols != NULL) {
85 for (int index = 0; index < count; index ++) { 85 for (int index = 0; index < count; index ++) {
86 if (STT_FUNC == ELF_ST_TYPE(m_symbols[index].st_info)) { 86 if (STT_FUNC == ELF_ST_TYPE(m_symbols[index].st_info)) {
87 address sym_addr = (address)m_symbols[index].st_value; 87 Elf_Word st_size = m_symbols[index].st_size;
88 if (sym_addr < addr && (addr - sym_addr) < *offset) { 88 address sym_addr;
89 pc = (address)m_symbols[index].st_value; 89 if (funcDescTable != NULL && funcDescTable->get_index() == m_symbols[index].st_shndx) {
90 *offset = (int)(addr - pc); 90 // We need to go another step trough the function descriptor table (currently PPC64 only)
91 sym_addr = funcDescTable->lookup(m_symbols[index].st_value);
92 } else {
93 sym_addr = (address)m_symbols[index].st_value;
94 }
95 if (sym_addr <= addr && (Elf_Word)(addr - sym_addr) < st_size) {
96 *offset = (int)(addr - sym_addr);
91 *posIndex = m_symbols[index].st_name; 97 *posIndex = m_symbols[index].st_name;
92 *stringtableIndex = m_shdr.sh_link; 98 *stringtableIndex = m_shdr.sh_link;
99 return true;
93 } 100 }
94 } 101 }
95 } 102 }
96 } else { 103 } else {
97 long cur_pos; 104 long cur_pos;
103 110
104 Elf_Sym sym; 111 Elf_Sym sym;
105 for (int index = 0; index < count; index ++) { 112 for (int index = 0; index < count; index ++) {
106 if (fread(&sym, sym_size, 1, m_file) == 1) { 113 if (fread(&sym, sym_size, 1, m_file) == 1) {
107 if (STT_FUNC == ELF_ST_TYPE(sym.st_info)) { 114 if (STT_FUNC == ELF_ST_TYPE(sym.st_info)) {
108 address sym_addr = (address)sym.st_value; 115 Elf_Word st_size = sym.st_size;
109 if (sym_addr < addr && (addr - sym_addr) < *offset) { 116 address sym_addr;
110 pc = (address)sym.st_value; 117 if (funcDescTable != NULL && funcDescTable->get_index() == sym.st_shndx) {
111 *offset = (int)(addr - pc); 118 // We need to go another step trough the function descriptor table (currently PPC64 only)
119 sym_addr = funcDescTable->lookup(sym.st_value);
120 } else {
121 sym_addr = (address)sym.st_value;
122 }
123 if (sym_addr <= addr && (Elf_Word)(addr - sym_addr) < st_size) {
124 *offset = (int)(addr - sym_addr);
112 *posIndex = sym.st_name; 125 *posIndex = sym.st_name;
113 *stringtableIndex = m_shdr.sh_link; 126 *stringtableIndex = m_shdr.sh_link;
127 return true;
114 } 128 }
115 } 129 }
116 } else { 130 } else {
117 m_status = NullDecoder::file_invalid; 131 m_status = NullDecoder::file_invalid;
118 return false; 132 return false;
121 fseek(m_file, cur_pos, SEEK_SET); 135 fseek(m_file, cur_pos, SEEK_SET);
122 } 136 }
123 return true; 137 return true;
124 } 138 }
125 139
126 #endif // _WINDOWS 140 #endif // !_WINDOWS && !__APPLE__