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/* $NetBSD: load.cpp,v 1.15 2008/04/28 20:23:20 martin Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by UCHIYAMA Yasushi.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <load.h>
#include <exec_coff.h>
#undef DPRINTF // trash coff_machdep.h 's define.
#include <console.h>
#include <memory.h>
#include <file.h>
#include <exec_elf.h>
Loader::Loader(Console *&cons, MemoryManager *&mem)
: _mem(mem), _cons(cons)
{
_file = 0;
_page_tag_start = 0;
}
LoaderOps
Loader::objectFormat(File &file)
{
union {
Elf_Ehdr elf;
coff_exechdr coff;
} header;
file.read(reinterpret_cast<void *>(&header), sizeof(header), 0);
if (header.elf.e_ident[EI_MAG0] == ELFMAG0 &&
header.elf.e_ident[EI_MAG1] == ELFMAG1 &&
header.elf.e_ident[EI_MAG2] == ELFMAG2 &&
header.elf.e_ident[EI_MAG3] == ELFMAG3)
return LOADER_ELF;
#ifdef COFF_BADMAG
if (!COFF_BADMAG(&header.coff.f))
return LOADER_COFF;
#endif // COFF_BADMAG
return LOADER_UNKNOWN;
}
BOOL
Loader::loadExtData(void)
{
size_t sz;
vaddr_t kv;
sz = _file->realsize();
kv = ROUND(_kernend, static_cast <vsize_t>(KERNEL_PAGE_SIZE));
DPRINTF((TEXT("[file system image]\n")));
_load_segment(kv, sz, 0, sz);
return _load_success();
}
void
Loader::loadEnd(void)
{
/* tag chain end */
_load_segment_end();
}
void
Loader::tagDump(int n)
{
#ifdef PAGE_LINK_DUMP
struct PageTag *p, *op;
int i = 0;
DPRINTF((TEXT("page tag start physical address: 0x%08x\n"),
_page_tag_start));
p = reinterpret_cast <struct PageTag *>(_page_tag_start);
do {
if (i < n || p->src == ~0)
DPRINTF((TEXT("[%d] next 0x%08x src 0x%08x dst 0x%08x sz 0x%x\n"),
i, p->next, p->src, p->dst, p->sz));
else if (i == n)
DPRINTF((TEXT("[...]\n")));
op = p;
i++;
} while ((p = reinterpret_cast <struct PageTag *>(p->next)) != ~0);
DPRINTF((TEXT("[%d(last)] next 0x%08x src 0x%08x dst 0x%08x sz 0x%x\n"),
i - 1, op->next, op->src, op->dst, op->sz));
#endif // PAGE_LINK_DUMP
}
paddr_t
Loader::tagStart(void)
{
return _page_tag_start;
}
void
Loader::_load_segment_start(void)
{
vaddr_t v;
paddr_t p;
_error = FALSE;
_nload_link = _n0clr_link = 0;
_tpsz = _mem->getTaggedPageSize();
// start of chain.
if (!_mem->getTaggedPage(v, p, &_pvec_clr, _pvec_clr_paddr))
_error = TRUE;
#ifdef PAGE_LINK_DUMP
_page_tag_start = (uint32_t)_pvec_clr;
#else
_page_tag_start = _pvec_clr_paddr;
#endif
_pvec_prev = _pvec_clr++;
_pvec_clr_paddr += sizeof(struct PageTag);
}
void
Loader::_load_segment_end(void)
{
_opvec_prev->next = ~0; // terminate
DPRINTF((TEXT("load link %d, zero clear link %d\n"),
_nload_link, _n0clr_link));
}
void
Loader::_load_segment(vaddr_t kv, vsize_t memsz, off_t fileofs, size_t filesz)
{
int j, n;
vaddr_t kv_start = kv;
DPRINTF((TEXT("\t->load 0x%08x+0x%08x=0x%08x ofs=0x%08x+0x%x\n"),
kv, memsz, kv + memsz, fileofs, filesz));
_kernend = kv + memsz;
if (filesz) {
n = filesz / _tpsz;
for (j = 0; j < n; j++) {
_opvec_prev = _pvec_prev;
_pvec_prev = _load_page(kv, fileofs,
_tpsz, _pvec_prev);
kv += _tpsz;
fileofs += _tpsz;
++_nload_link;
}
size_t rest = filesz % _tpsz;
if (rest) {
_opvec_prev = _pvec_prev;
_pvec_prev = _load_page(kv, fileofs, rest, _pvec_prev);
++_nload_link;
}
}
// zero clear tag
if (filesz < memsz) {
_pvec_prev->src = ~0;
_pvec_prev->dst = kv_start + filesz;
_pvec_prev->sz = memsz - filesz;
#ifdef PAGE_LINK_DUMP
_pvec_prev->next = (uint32_t)_pvec_clr;
#else
_pvec_prev->next = ptokv(_pvec_clr_paddr);
#endif
DPRINTF((TEXT("\t->zero 0x%08x+0x%08x=0x%08x\n"),
_pvec_prev->dst, _pvec_prev->sz,
_pvec_prev->dst + _pvec_prev->sz));
_opvec_prev = _pvec_prev;
_pvec_prev = _pvec_clr++;
_pvec_clr_paddr += sizeof(struct PageTag);
++_n0clr_link;
}
}
void
Loader::_load_memory(vaddr_t kv, vsize_t memsz, void *data)
{
struct PageTag *pvec;
paddr_t p, pvec_paddr;
vaddr_t v;
vaddr_t dst;
vsize_t remsz;
DPRINTF((TEXT("\t->load 0x%08x+0x%08x=0x%08x\n"),
kv, memsz, kv + memsz));
dst = kv;
remsz = memsz;
while (remsz > 0) {
_opvec_prev = _pvec_prev;
if (!_mem->getTaggedPage(v, p, &pvec, pvec_paddr))
_error = TRUE;
vsize_t tocopy = (remsz < _tpsz) ? remsz : _tpsz;
memcpy((void *)v, data, tocopy);
_pvec_prev->src = ptokv(p);
_pvec_prev->dst = dst;
_pvec_prev->sz = tocopy;
#ifdef PAGE_LINK_DUMP
_pvec_prev->next = (uint32_t)pvec;
#else
_pvec_prev->next = ptokv(pvec_paddr);
#endif
data = (char *)data + tocopy;
dst += tocopy;
remsz -= tocopy;
_pvec_prev = pvec;
++_nload_link;
}
_kernend = kv + memsz;
}
struct PageTag *
Loader::_load_page(vaddr_t kv, off_t ofs, size_t sz, struct PageTag *prev)
{
struct PageTag *pvec;
paddr_t p, pvec_paddr;
vaddr_t v;
if (!_mem->getTaggedPage(v, p, &pvec, pvec_paddr))
_error = TRUE;
_file->read((void *)v, sz, ofs);
prev->src = ptokv(p);
prev->dst = kv;
prev->sz = sz;
#ifdef PAGE_LINK_DUMP
prev->next = (uint32_t)pvec;
#else
prev->next = ptokv(pvec_paddr);
#endif
return pvec;
}
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