зеркало из https://github.com/mozilla/pjs.git
112 строки
2.9 KiB
C++
112 строки
2.9 KiB
C++
// vim:ts=8:sw=2:et:
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// The contents of this file are subject to the Mozilla Public License
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// Version 1.1 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License
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// at http://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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// the License for the specific language governing rights and
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// limitations under the License.
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//
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// The Initial Developer of the Original Code is Kipp E.B. Hickman.
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#include "leaky.h"
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#ifdef USE_BFD
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#include <stdio.h>
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#include <string.h>
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#include <bfd.h>
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extern "C" {
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char *cplus_demangle (const char *mangled, int options);
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}
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#define NEXT_SYMBOL \
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sp++; \
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if (sp >= lastSymbol) { \
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long n = numExternalSymbols + 10000; \
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externalSymbols = (Symbol*) \
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realloc(externalSymbols, (size_t) (sizeof(Symbol) * n)); \
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lastSymbol = externalSymbols + n; \
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sp = externalSymbols + numExternalSymbols; \
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numExternalSymbols = n; \
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}
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void leaky::ReadSymbols(const char *aFileName, u_long aBaseAddress)
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{
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int initialSymbols = usefulSymbols;
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if (NULL == externalSymbols) {
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externalSymbols = (Symbol*) malloc(sizeof(Symbol) * 10000);
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numExternalSymbols = 10000;
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}
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Symbol* sp = externalSymbols + usefulSymbols;
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Symbol* lastSymbol = externalSymbols + numExternalSymbols;
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// Create a dummy symbol for the library so, if it doesn't have any
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// symbols, we show it by library.
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sp->Init(aFileName, aBaseAddress);
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NEXT_SYMBOL
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static bfd_boolean kDynamic = (bfd_boolean) false;
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static int firstTime = 1;
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if (firstTime) {
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firstTime = 0;
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bfd_init ();
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}
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bfd* lib = bfd_openr(aFileName, NULL);
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if (NULL == lib) {
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return;
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}
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char **matching;
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if (!bfd_check_format_matches(lib, bfd_object, &matching)) {
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bfd_close(lib);
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return;
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}
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asymbol* store;
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store = bfd_make_empty_symbol(lib);
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// read mini symbols
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PTR minisyms;
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unsigned int size;
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long symcount = bfd_read_minisymbols(lib, kDynamic, &minisyms, &size);
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// Scan symbols
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bfd_byte* from = (bfd_byte *) minisyms;
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bfd_byte* fromend = from + symcount * size;
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for (; from < fromend; from += size) {
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asymbol *sym;
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sym = bfd_minisymbol_to_symbol(lib, kDynamic, (const PTR) from, store);
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symbol_info syminfo;
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bfd_get_symbol_info (lib, sym, &syminfo);
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// if ((syminfo.type == 'T') || (syminfo.type == 't')) {
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const char* nm = bfd_asymbol_name(sym);
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if (nm && nm[0]) {
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char* dnm = NULL;
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if (strncmp("__thunk", nm, 7)) {
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dnm = cplus_demangle(nm, 1);
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}
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sp->Init(dnm ? dnm : nm, syminfo.value + aBaseAddress);
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NEXT_SYMBOL
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}
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// }
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}
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bfd_close(lib);
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int interesting = sp - externalSymbols;
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if (!quiet) {
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printf("%s provided %d symbols\n", aFileName,
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interesting - initialSymbols);
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}
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usefulSymbols = interesting;
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}
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#endif /* USE_BFD */
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