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handle compressed executables larger than 3MB on Elf64amd 

committer: jreiser <jreiser> 1131833508 +0000
This commit is contained in:
John Reiser 2005-11-12 22:11:48 +00:00
parent 59a2fb9cfd
commit ce33ffb62a
1 changed files with 47 additions and 13 deletions
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60
src/p_lx_elf.cpp
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@ -885,33 +885,67 @@ void PackLinuxElf32ppc::pack3(OutputFile *fo, Filter &ft)
void PackLinuxElf64amd::pack3(OutputFile *fo, Filter &ft)
{
char zero[-(~0<<4)];
char zero[8];
unsigned const hlen = sz_elf_hdrs + sizeof(l_info) + sizeof(p_info);
unsigned const len0 = fo->getBytesWritten();
unsigned len = len0;
unsigned const frag = ~(~0<<4) & -len; // align to 0 mod 16
unsigned const frag = 7 & -len; // align to 0 mod 8
memset(zero, 0, sizeof(zero));
fo->write(&zero, frag);
len += frag;
#define PAGE_MASK (~0u<<12)
#define PAGE_SIZE (-PAGE_MASK)
acc_uint64l_t const brk = getbrk(phdri, ehdri.e_phnum);
upx_byte *const p = const_cast<upx_byte *>(getLoader());
lsize = getLoaderSize();
acc_uint64l_t const lo_va_user = 0x400000; // XXX
acc_uint64l_t lo_va_stub = elfout.phdr[0].p_vaddr;
acc_uint64l_t adrc;
acc_uint64l_t adrm;
acc_uint64l_t adru;
acc_uint64l_t adrx;
unsigned cntc;
unsigned lenm;
unsigned lenu;
len += (7&-lsize) + lsize;
bool const is_big = (lo_va_user < (lo_va_stub + len + 2*PAGE_SIZE));
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;
adrc = lo_va_stub;
adrm = getbrk(phdri, ehdri.e_phnum);
adru = PAGE_MASK & (~PAGE_MASK + adrm); // round up to page boundary
adrx = adru + hlen;
lenm = PAGE_SIZE + len;
lenu = PAGE_SIZE + len;
cntc = len >> 3;
}
else {
adrm = lo_va_stub + len;
adrc = adrm;
adru = lo_va_stub;
adrx = lo_va_stub + hlen;
lenm = PAGE_SIZE;
lenu = PAGE_SIZE + len;
cntc = 0;
}
adrm = PAGE_MASK & (~PAGE_MASK + adrm); // round up to page boundary
adrc = PAGE_MASK & (~PAGE_MASK + adrc); // round up to page boundary
// patch in order of descending address
// compressed input for eXpansion
patch_le32(p,lsize,"LENX", len0 - hlen);
patch_le32(p,lsize,"ADRX", elfout.phdr[0].p_vaddr + hlen);
patch_le32(p,lsize,"ADRX", adrx); // compressed input for eXpansion
patch_le32(p,lsize,"CNTC", 0>>3); // count for copy
patch_le32(p,lsize,"LENU", PAGE_SIZE + len); // len for unmap
patch_le32(p,lsize,"ADRC", PAGE_MASK & (~PAGE_MASK + brk)); // addr for copy
patch_le32(p,lsize,"ADRU", elfout.phdr[0].p_vaddr); // addr for unmap
patch_le32(p,lsize,"JMPU", 12+0x400000); // XXX trampoline for unmap
patch_le32(p,lsize,"LENM", PAGE_SIZE); // len for map
patch_le32(p,lsize,"ADRM", PAGE_MASK & (~PAGE_MASK + brk)); // addr for map
patch_le32(p,lsize,"CNTC", cntc); // count for copy
patch_le32(p,lsize,"LENU", lenu); // len for unmap
patch_le32(p,lsize,"ADRC", adrc); // addr for copy
patch_le32(p,lsize,"ADRU", adru); // addr for unmap
patch_le32(p,lsize,"JMPU", 12 + lo_va_user); // trampoline for unmap
patch_le32(p,lsize,"LENM", lenm); // len for map
patch_le32(p,lsize,"ADRM", adrm); // addr for map
#undef PAGE_SIZE
#undef PAGE_MASK
super::pack3(fo, ft);