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Pesky "upx -t" mode 

https://github.com/upx/upx/issues/599
	modified:   p_lx_elf.cpp
This commit is contained in:
John Reiser 2022-12-30 10:29:25 -08:00 committed by Markus F.X.J. Oberhumer
parent 77ba43328b
commit 619aeb54ff
1 changed files with 11 additions and 5 deletions
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16
src/p_lx_elf.cpp
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@ -4887,8 +4887,10 @@ PackLinuxElf64::unRela64(
(void)old_dtinit;
} // end each RELA
fo->seek(dt_rela, SEEK_SET);
fo->rewrite(rela0, relasz);
if (fo) {
fo->seek(dt_rela, SEEK_SET);
fo->rewrite(rela0, relasz);
}
}
// File layout of compressed .so (new-style: 3 or 4 PT_LOAD) shared library:
@ -5045,7 +5047,9 @@ void PackLinuxElf64::un_shlib_1(
if (p_offset < yct_off) {
p_offset = yct_off; // not at beginning of PT_LOAD
}
fo->seek(p_offset, SEEK_SET);
if (fo) {
fo->seek(p_offset, SEEK_SET);
}
// Peek at b_info to find sizes
fi->readx(&hdr.b, sizeof(hdr.b));
fi->seek(-(off_t)sizeof(struct b_info), SEEK_CUR);
@ -5204,8 +5208,10 @@ void PackLinuxElf64::un_DT_INIT(
upx_uint64_t d = plt_va - vaddr - asl_delta;
if (d < filesz) {
upx_uint64_t offset = get_te64(&phdr->p_offset);
fo->seek(d + offset, SEEK_SET);
fo->rewrite(jump_slots, n_plt * sizeof(upx_uint64_t));
if (fo) {
fo->seek(d + offset, SEEK_SET);
fo->rewrite(jump_slots, n_plt * sizeof(upx_uint64_t));
}
break;
}
}