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PackLinuxElf32armLe, PackLinuxElf32armBe

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This commit is contained in:
John Reiser
2006-06-13 08:51:02 -07:00
parent 49c1da79c8
commit d89e561a85
3 changed files with 74 additions and 19 deletions
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src/p_lx_elf.cpp
+52 -14
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@@ -215,6 +215,14 @@ PackLinuxElf32armLe::getCompressionMethods(int /*method*/, int /*level*/) const
return m_nrv2e;
}
int const *
PackLinuxElf32armBe::getCompressionMethods(int /*method*/, int /*level*/) const
{
static const int m_nrv2e[] = { M_NRV2E_8, -1 };
return m_nrv2e;
}
int const *
PackLinuxElf32ppc::getFilters() const
{
@@ -560,6 +568,14 @@ PackLinuxElf32armLe::buildLoader(const Filter *ft)
linux_elf32arm_fold, sizeof(linux_elf32arm_fold), ft );
}
int
PackLinuxElf32armBe::buildLoader(const Filter *ft) // FIXME
{
return buildLinuxLoader(
linux_elf32arm_loader, sizeof(linux_elf32arm_loader),
linux_elf32arm_fold, sizeof(linux_elf32arm_fold), ft );
}
static const
#include "stub/l_lx_elfppc32.h"
static const
@@ -878,6 +894,12 @@ void PackLinuxElf32armLe::pack1(OutputFile *fo, Filter &ft)
generateElfHdr(fo, linux_elf32arm_fold, getbrk(phdri, ehdri.e_phnum) );
}
void PackLinuxElf32armBe::pack1(OutputFile *fo, Filter &ft) // FIXME
{
super::pack1(fo, ft);
generateElfHdr(fo, linux_elf32arm_fold, getbrk(phdri, ehdri.e_phnum) );
}
void PackLinuxElf32ppc::pack1(OutputFile *fo, Filter &ft)
{
super::pack1(fo, ft);
@@ -1205,7 +1227,7 @@ void PackLinuxElf32armLe::pack3(OutputFile *fo, Filter &ft)
upx_byte *const p = const_cast<upx_byte *>(getLoader());
lsize = getLoaderSize();
unsigned const lo_va_user = 0x8000; // XXX
unsigned lo_va_stub = elfout.phdr[0].p_vaddr;
unsigned lo_va_stub = get_native32(&elfout.phdr[0].p_vaddr);
unsigned adrc;
unsigned adrm;
unsigned adrx;
@@ -1216,11 +1238,11 @@ void PackLinuxElf32armLe::pack3(OutputFile *fo, Filter &ft)
bool const is_big = true;
if (is_big) {
elfout.ehdr.e_entry += lo_va_user - lo_va_stub;
elfout.phdr[0].p_vaddr = lo_va_user;
elfout.phdr[0].p_paddr = lo_va_user;
lo_va_stub = lo_va_user;
set_native32(&elfout.phdr[0].p_vaddr, lo_va_user);
set_native32(&elfout.phdr[0].p_paddr, lo_va_user);
lo_va_stub = lo_va_user;
adrc = lo_va_stub;
adrm = getbrk(phdri, ehdri.e_phnum);
adrm = getbrk(phdri, get_native16(&ehdri.e_phnum));
adrx = hlen + (PAGE_MASK & (~PAGE_MASK + adrm)); // round up to page boundary
lenm = PAGE_SIZE + len;
cntc = len >> 5;
@@ -1683,6 +1705,14 @@ PackLinuxElf32armLe::~PackLinuxElf32armLe()
{
}
PackLinuxElf32armBe::PackLinuxElf32armBe(InputFile *f) : super(f)
{
}
PackLinuxElf32armBe::~PackLinuxElf32armBe()
{
}
const int *
PackLinuxElf32armLe::getFilters() const
{
@@ -1690,6 +1720,13 @@ PackLinuxElf32armLe::getFilters() const
return filters;
}
const int *
PackLinuxElf32armBe::getFilters() const
{
static const int filters[] = { 0x50, -1 };
return filters;
}
bool PackLinuxElf32armLe::canPack()
{
unsigned char buf[sizeof(Elf32_Ehdr) + 14*sizeof(Elf32_Phdr)];
@@ -1707,18 +1744,19 @@ bool PackLinuxElf32armLe::canPack()
return false;
// additional requirements for linux/elfarm
if (ehdr->e_ehsize != sizeof(*ehdr)) {
if (get_native16(&ehdr->e_ehsize) != sizeof(*ehdr)) {
throwCantPack("invalid Ehdr e_ehsize; try `--force-execve'");
return false;
}
if (ehdr->e_phoff != sizeof(*ehdr)) {// Phdrs not contiguous with Ehdr
if (get_native32(&ehdr->e_phoff) != sizeof(*ehdr)) {// Phdrs not contiguous with Ehdr
throwCantPack("non-contiguous Ehdr/Phdr; try `--force-execve'");
return false;
}
// The first PT_LOAD32 must cover the beginning of the file (0==p_offset).
Elf32_Phdr const *phdr = (Elf32_Phdr const *)(buf + ehdr->e_phoff);
for (unsigned j=0; j < ehdr->e_phnum; ++phdr, ++j) {
Elf32_Phdr const *phdr = (Elf32_Phdr const *)(buf + get_native32(&ehdr->e_phoff));
unsigned const e_phnum = get_native16(&ehdr->e_phnum);
for (unsigned j=0; j < e_phnum; ++phdr, ++j) {
if (j >= 14) // 512 bytes holds Elf32_Ehdr + Elf32_Phdr[0..13]
return false;
if (phdr->PT_LOAD32 == get_native32(&phdr->p_type)) {
@@ -1753,13 +1791,13 @@ bool PackLinuxElf32armLe::canPack()
// Otherwise (no __libc_start_main as global undefined): skip it.
// Also allow __uClibc_main and __uClibc_start_main .
if (Elf32_Ehdr::ET_DYN==ehdr->e_type) {
if (Elf32_Ehdr::ET_DYN==get_native16(&ehdr->e_type)) {
// The DT_STRTAB has no designated length. Read the whole file.
file_image = new char[file_size];
fi->seek(0, SEEK_SET);
fi->readx(file_image, file_size);
ehdri= *ehdr;
phdri= (Elf32_Phdr *)(ehdr->e_phoff + file_image); // do not free() !!
phdri= (Elf32_Phdr *)(get_native32(&ehdr->e_phoff) + file_image); // do not free() !!
int j= ehdr->e_phnum;
phdr= phdri;
@@ -1778,9 +1816,9 @@ bool PackLinuxElf32armLe::canPack()
for (j=0; j<3; ++j) {
// elf_lookup() returns 0 if any required table is missing.
Elf32_Sym const *const lsm = elf_lookup(run_start[j]);
if (lsm && lsm->st_shndx==Elf32_Sym::SHN_UNDEF
&& lsm->st_info==lsm->Elf32_Sym::St_info(Elf32_Sym::STB_GLOBAL, Elf32_Sym::STT_FUNC)
&& lsm->st_other==Elf32_Sym::STV_DEFAULT ) {
if (lsm && get_native16(&lsm->st_shndx)==Elf32_Sym::SHN_UNDEF
&& get_native16(&lsm->st_info)==lsm->Elf32_Sym::St_info(Elf32_Sym::STB_GLOBAL, Elf32_Sym::STT_FUNC)
&& get_native16(&lsm->st_other)==Elf32_Sym::STV_DEFAULT ) {
break;
}
}