5936c79ba0
SE mode now has a port that goes to whatever toplevel mem object the
CPU sees that does the appropriate translation for syscall emulation
SConscript:
translating port is a syscall emu only source
arch/alpha/system.cc:
base/loader/object_file.cc:
base/loader/object_file.hh:
Use the new functional port to write the binaries into memory
cpu/cpu_exec_context.cc:
cpu/cpu_exec_context.hh:
cpu/simple/cpu.cc:
We aren't always going to be writing straight to memory with syscalls
support writing to a cache
mem/port.hh:
Add a simple unidirectional functional port that panics on any incoming requests
mem/translating_port.hh:
make translating port inherit from the simple port
sim/system.cc:
sim/system.hh:
Add a functional port that is used to load the original binaries
--HG--
extra : convert_revision : 9096866d0b23e3aceea68394abb76e63c0f8fd8d
145 lines
4 KiB
C++
145 lines
4 KiB
C++
/*
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* Copyright (c) 2002-2004 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <list>
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#include <string>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "base/cprintf.hh"
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#include "base/loader/object_file.hh"
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#include "base/loader/symtab.hh"
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#include "base/loader/ecoff_object.hh"
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#include "base/loader/aout_object.hh"
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#include "base/loader/elf_object.hh"
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#include "mem/translating_port.hh"
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using namespace std;
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ObjectFile::ObjectFile(const string &_filename, int _fd,
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size_t _len, uint8_t *_data,
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Arch _arch, OpSys _opSys)
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: filename(_filename), descriptor(_fd), fileData(_data), len(_len),
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arch(_arch), opSys(_opSys)
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{
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}
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ObjectFile::~ObjectFile()
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{
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close();
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}
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bool
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ObjectFile::loadSection(Section *sec, Port *memPort, Addr addrMask)
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{
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if (sec->size != 0) {
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Addr addr = sec->baseAddr & addrMask;
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if (sec->fileImage) {
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memPort->writeBlob(addr, sec->fileImage, sec->size);
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}
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else {
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// no image: must be bss
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memPort->memsetBlob(addr, 0, sec->size);
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}
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}
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return true;
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}
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bool
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ObjectFile::loadSections(Port *memPort, Addr addrMask)
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{
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return (loadSection(&text, memPort, addrMask)
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&& loadSection(&data, memPort, addrMask)
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&& loadSection(&bss, memPort, addrMask));
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}
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void
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ObjectFile::close()
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{
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if (descriptor >= 0) {
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::close(descriptor);
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descriptor = -1;
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}
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if (fileData) {
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::munmap(fileData, len);
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fileData = NULL;
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}
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}
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ObjectFile *
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createObjectFile(const string &fname)
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{
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// open the file
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int fd = open(fname.c_str(), O_RDONLY);
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if (fd < 0) {
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return NULL;
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}
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// find the length of the file by seeking to the end
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size_t len = (size_t)lseek(fd, 0, SEEK_END);
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// mmap the whole shebang
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uint8_t *fileData =
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(uint8_t *)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
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if (fileData == MAP_FAILED) {
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close(fd);
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return NULL;
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}
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ObjectFile *fileObj = NULL;
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// figure out what we have here
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if ((fileObj = EcoffObject::tryFile(fname, fd, len, fileData)) != NULL) {
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return fileObj;
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}
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if ((fileObj = AoutObject::tryFile(fname, fd, len, fileData)) != NULL) {
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return fileObj;
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}
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if ((fileObj = ElfObject::tryFile(fname, fd, len, fileData)) != NULL) {
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return fileObj;
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}
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// don't know what it is
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close(fd);
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munmap(fileData, len);
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return NULL;
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}
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