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PackVmlinuxBase<T>::pack() EM_PPC filter only contiguous instruction sections

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This commit is contained in:
John Reiser 2007-05-01 19:12:55 -07:00
parent faa33d89a2
commit c3363712d9
1 changed files with 44 additions and 4 deletions
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48
src/p_vmlinx.cpp
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@ -324,13 +324,53 @@ void PackVmlinuxBase<T>::pack(OutputFile *fo)
ppc32_extra += sizeof(hdr_info) + len_cpr + frag;
fo_off += len_cpr + frag;
fo->write(cpr_hdr, len_cpr + frag);
compressWithFilters(&ft, 512, &cconf, getStrategy(ft));
// Partial filter: .text and following contiguous SHF_EXECINSTR
upx_bytep f_ptr = ibuf;
unsigned f_len = 0;
Shdr const *shdr = 1+ shdri; // skip empty shdr[0]
if (ft.buf_len==0 // not specified yet FIXME: was set near construction
&& (Shdr::SHF_ALLOC & shdr->sh_flags)
&& (Shdr::SHF_EXECINSTR & shdr->sh_flags)) {
// shdr[1] is instructions (probably .text)
f_ptr = ibuf + (shdr->sh_offset - phdri[0].p_offset);
f_len = shdr->sh_size;
++shdr;
for (int j= -2+ ehdri.e_shnum; --j>=0; ++shdr) {
if ((Shdr::SHF_ALLOC & shdr->sh_flags)
&& (Shdr::SHF_EXECINSTR & shdr->sh_flags)
&& shdr[0].sh_offset==(shdr[-1].sh_size + shdr[-1].sh_offset)) {
f_len += shdr->sh_size;
}
else {
break;
}
}
}
else { // ft.buf_len already specified, or shdr[1] not instructions
f_ptr = ibuf;
f_len = ph.u_len;
}
compressWithFilters(ibuf, ph.u_len, obuf,
f_ptr, f_len, // filter range
NULL, 0, // hdr_ptr, hdr_len
&ft, 512, &cconf, getStrategy(ft));
set_be32(&hdr_info.sz_unc, ph.u_len);
set_be32(&hdr_info.sz_cpr, ph.c_len);
hdr_info.b_ftid = ft.id;
hdr_info.b_cto8 = ft.cto;
if (ph.u_len!=f_len) {
hdr_info.b_unused = 1; // flag for partial filter
}
fo->write(&hdr_info, sizeof(hdr_info)); fo_off += sizeof(hdr_info);
ppc32_extra += sizeof(hdr_info);
if (ph.u_len!=f_len) {
set_be32(&hdr_info.sz_unc, f_ptr - ibuf);
set_be32(&hdr_info.sz_cpr, f_len);
fo->write(&hdr_info, 2*sizeof(unsigned)); fo_off += 2*sizeof(unsigned);
ppc32_extra += 2*sizeof(unsigned);
}
#if 0 /*{ Documentation: changes to arch/powerpc/boot/main.c */
struct b_info {
@ -947,9 +987,9 @@ void PackVmlinuxPPC32::buildLoader(const Filter *ft)
addFilter32(ft->id);
}
addLoader("LINUX030", NULL);
if (ph.method == M_NRV2E_8) addLoader("NRV2E", NULL);
else if (ph.method == M_NRV2B_8) addLoader("NRV2B", NULL);
else if (ph.method == M_NRV2D_8) addLoader("NRV2D", NULL);
if (ph.method == M_NRV2E_LE32) addLoader("NRV2E", NULL);
else if (ph.method == M_NRV2B_LE32) addLoader("NRV2B", NULL);
else if (ph.method == M_NRV2D_LE32) addLoader("NRV2D", NULL);
else if (M_IS_LZMA(ph.method)) addLoader("LZMA_ELF00,LZMA_DEC10,LZMA_DEC30", NULL);
else throwBadLoader();
addLoader("IDENTSTR,UPX1HEAD", NULL);