diff options
Diffstat (limited to 'base/object_file.cc')
| -rw-r--r-- | base/object_file.cc | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/base/object_file.cc b/base/object_file.cc new file mode 100644 index 000000000..b9542f280 --- /dev/null +++ b/base/object_file.cc @@ -0,0 +1,173 @@ +/* + * Copyright (c) 2003 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <list> +#include <string> + +#include <sys/types.h> +#include <sys/mman.h> +#include <fcntl.h> +#include <stdio.h> +#include <unistd.h> + +#include "cprintf.hh" +#include "ecoff.hh" +#include "object_file.hh" +#include "symtab.hh" + +using namespace std; + +ObjectFile::ObjectFile() + : descriptor(-1), data(NULL) +{} + +ObjectFile::ObjectFile(string file) + : descriptor(-1), data(NULL) +{ open(file); } + +ObjectFile::~ObjectFile() +{ close(); } + +bool +ObjectFile::open(string file_name) +{ + close(); + + name = file_name; + + descriptor = ::open(name.c_str(), O_RDONLY); + if (descriptor < 0) + return false; + + len = (size_t)::lseek(descriptor, 0, SEEK_END); + + data = (uint8_t *)::mmap(NULL, len, PROT_READ, MAP_SHARED, descriptor, 0); + if (data == MAP_FAILED) + return false; + + postOpen(); + + return true; +} + +void +ObjectFile::close() +{ + if (descriptor >= 0) + ::close(descriptor); + + if (data) + ::munmap(data, len); +} + +void +EcoffObject::postOpen() +{ + exec = &(((EcoffExecHeader *)data)->f); + aout = &(((EcoffExecHeader *)data)->a); + + text_off = aout->text_start; + data_off = aout->data_start; + bss_off = aout->bss_start; + + text_size = aout->tsize; + data_size = aout->dsize; + bss_size = aout->bsize; +} + +bool +EcoffObject::loadGlobals(SymbolTable *symtab) +{ + if (!symtab) + return false; + + if (exec->f_magic != ALPHAMAGIC) { + cprintf("wrong magic\n"); + return false; + } + + EcoffSymHeader *syms = (EcoffSymHeader *)(data + exec->f_symptr); + if (syms->magic != ECOFF_SYM_MAGIC) { + cprintf("bad symbol header magic\n"); + exit(1); + } + + EcoffExtSymEntry *ext_syms = + (EcoffExtSymEntry *)(data + syms->cbExtOffset); + + char *ext_strings = (char *)(data + syms->cbSsExtOffset); + for (int i = 0; i < syms->iextMax; i++) { + EcoffSymEntry *entry = &(ext_syms[i].asym); + if (entry->iss != -1) + symtab->insert(entry->value, ext_strings + entry->iss); + } + + return true; +} + +bool +EcoffObject::loadLocals(SymbolTable *symtab) +{ + if (!symtab) + return false; + + if (exec->f_magic != ALPHAMAGIC) { + cprintf("wrong magic\n"); + return false; + } + + EcoffSymHeader *syms = (EcoffSymHeader *)(data + exec->f_symptr); + if (syms->magic != ECOFF_SYM_MAGIC) { + cprintf("bad symbol header magic\n"); + exit(1); + } + + EcoffSymEntry *local_syms = (EcoffSymEntry *)(data + syms->cbSymOffset); + char *local_strings = (char *)(data + syms->cbSsOffset); + EcoffFileDesc *fdesc = (EcoffFileDesc *)(data + syms->cbFdOffset); + + for (int i = 0; i < syms->ifdMax; i++) { + EcoffSymEntry *entry = + (EcoffSymEntry *)(local_syms + fdesc[i].isymBase); + char *strings = (char *)(local_strings + fdesc[i].issBase); + for (int j = 0; j < fdesc[i].csym; j++) { + if (entry[j].st == 1 || entry[j].st == 6) + if (entry[j].iss != -1) + symtab->insert(entry[j].value, strings + entry[j].iss); + } + } + + for (int i = 0; i < syms->isymMax; i++) { + EcoffSymEntry *entry = &(local_syms[i]); + if (entry->st == 6) + if (entry->st == 1 || entry->st == 6) + symtab->insert(entry->value, local_strings + entry->iss); + } + + return true; +} |