mirror/upx
1
0
Fork 0
mirror of https://github.com/upx/upx synced 2025-09-28 19:06:07 +08:00
Code Issues Releases Wiki Activity

Fix rotate+lop of PT_INTERP in shared library

Browse Source 
Found while working on https://github.com/upx/upx/issues/262
but probably does not help that bug.
	modified:   p_lx_elf.cpp
This commit is contained in:
John Reiser 2019-04-01 21:35:53 -07:00
parent 4484acf9d6
commit f23267bddd
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/p_lx_elf.cpp
View File

@ -426,9 +426,10 @@ off_t PackLinuxElf32::pack3(OutputFile *fo, Filter &ft)
// by decrementing e_phnum.
memcpy((unsigned char *)ibuf, phdr, sizeof(*phdr)); // extract
memmove(phdr, 1+phdr, (e_phnum - (1+ j))*sizeof(*phdr)); // overlapping
memcpy(&phdr[-1+ e_phnum], (unsigned char *)ibuf, sizeof(*phdr)); // to top
--phdr;
set_te16(&ehdri.e_phnum, --e_phnum);
memcpy(&phdr[e_phnum - (1+ j)], (unsigned char *)ibuf, sizeof(*phdr)); // to top
--phdr; --e_phnum;
set_te16(&ehdri.e_phnum, e_phnum);
set_te16(&((Elf32_Ehdr *)(unsigned char *)lowmem)->e_phnum, e_phnum);
continue;
}
if (PT_LOAD32 == type) {
@ -550,9 +551,10 @@ off_t PackLinuxElf64::pack3(OutputFile *fo, Filter &ft)
// by decrementing e_phnum.
memcpy((unsigned char *)ibuf, phdr, sizeof(*phdr)); // extract
memmove(phdr, 1+phdr, (e_phnum - (1+ j))*sizeof(*phdr)); // overlapping
memcpy(&phdr[-1+ e_phnum], (unsigned char *)ibuf, sizeof(*phdr)); // to top
--phdr;
set_te16(&ehdri.e_phnum, --e_phnum);
memcpy(&phdr[e_phnum - (1+ j)], (unsigned char *)ibuf, sizeof(*phdr)); // to top
--phdr; --e_phnum;
set_te16(&ehdri.e_phnum, e_phnum);
set_te16(&((Elf64_Ehdr *)(unsigned char *)lowmem)->e_phnum, e_phnum);
continue;
}
if (PT_LOAD64 == type) {