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Recognize __libc_init for Android -pie (PositionIndependentExecutable)

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based on https://github.com/upx/upx/pull/92/commits/d34887ef60304cb28990c4b99c17b1f91acbbef1
	modified:   p_lx_elf.cpp
This commit is contained in:
John Reiser
2017-04-24 11:03:06 -07:00
parent 5b53c11a6b
commit 15e9d8c99d
1 changed files with 14 additions and 7 deletions
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src/p_lx_elf.cpp
+14 -7
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@@ -1602,7 +1602,8 @@ bool PackLinuxElf32::canPack()
) {
unsigned const symnum = get_te32(&jmprel->r_info) >> 8;
char const *const symnam = get_te32(&dynsym[symnum].st_name) + dynstr;
if (0==strcmp(symnam, "__libc_start_main")
if (0==strcmp(symnam, "__libc_start_main") // glibc
|| 0==strcmp(symnam, "__libc_init") // Android
|| 0==strcmp(symnam, "__uClibc_main")
|| 0==strcmp(symnam, "__uClibc_start_main"))
goto proceed;
@@ -1792,7 +1793,8 @@ PackLinuxElf64ppcle::canPack()
) {
unsigned const symnum = get_te64(&jmprela->r_info) >> 32;
char const *const symnam = get_te32(&dynsym[symnum].st_name) + dynstr;
if (0==strcmp(symnam, "__libc_start_main")
if (0==strcmp(symnam, "__libc_start_main") // glibc
|| 0==strcmp(symnam, "__libc_init") // Android
|| 0==strcmp(symnam, "__uClibc_main")
|| 0==strcmp(symnam, "__uClibc_start_main"))
goto proceed;
@@ -1806,7 +1808,8 @@ PackLinuxElf64ppcle::canPack()
) {
unsigned const symnum = get_te64(&rela->r_info) >> 32;
char const *const symnam = get_te32(&dynsym[symnum].st_name) + dynstr;
if (0==strcmp(symnam, "__libc_start_main")
if (0==strcmp(symnam, "__libc_start_main") // glibc
|| 0==strcmp(symnam, "__libc_init") // Android
|| 0==strcmp(symnam, "__uClibc_main")
|| 0==strcmp(symnam, "__uClibc_start_main"))
goto proceed;
@@ -1986,7 +1989,8 @@ PackLinuxElf64amd::canPack()
) {
unsigned const symnum = get_te64(&jmprela->r_info) >> 32;
char const *const symnam = get_te32(&dynsym[symnum].st_name) + dynstr;
if (0==strcmp(symnam, "__libc_start_main")
if (0==strcmp(symnam, "__libc_start_main") // glibc
|| 0==strcmp(symnam, "__libc_init") // Android
|| 0==strcmp(symnam, "__uClibc_main")
|| 0==strcmp(symnam, "__uClibc_start_main"))
goto proceed;
@@ -2000,7 +2004,8 @@ PackLinuxElf64amd::canPack()
) {
unsigned const symnum = get_te64(&rela->r_info) >> 32;
char const *const symnam = get_te32(&dynsym[symnum].st_name) + dynstr;
if (0==strcmp(symnam, "__libc_start_main")
if (0==strcmp(symnam, "__libc_start_main") // glibc
|| 0==strcmp(symnam, "__libc_init") // Android
|| 0==strcmp(symnam, "__uClibc_main")
|| 0==strcmp(symnam, "__uClibc_start_main"))
goto proceed;
@@ -2181,7 +2186,8 @@ PackLinuxElf64arm::canPack()
) {
unsigned const symnum = get_te64(&jmprela->r_info) >> 32;
char const *const symnam = get_te32(&dynsym[symnum].st_name) + dynstr;
if (0==strcmp(symnam, "__libc_start_main")
if (0==strcmp(symnam, "__libc_start_main") // glibc
|| 0==strcmp(symnam, "__libc_init") // Android
|| 0==strcmp(symnam, "__uClibc_main")
|| 0==strcmp(symnam, "__uClibc_start_main"))
goto proceed;
@@ -2195,7 +2201,8 @@ PackLinuxElf64arm::canPack()
) {
unsigned const symnum = get_te64(&rela->r_info) >> 32;
char const *const symnam = get_te32(&dynsym[symnum].st_name) + dynstr;
if (0==strcmp(symnam, "__libc_start_main")
if (0==strcmp(symnam, "__libc_start_main") // glibc
|| 0==strcmp(symnam, "__libc_init") // Android
|| 0==strcmp(symnam, "__uClibc_main")
|| 0==strcmp(symnam, "__uClibc_start_main"))
goto proceed;