search for: relacount

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Targeting old glibc
2020 Nov 12
1
Targeting old glibc
...me glibc ld.so will error > "unsupported version 0 of Verneed record". > Thus we need to drop the DT_VERNEED tag as well. > To achieve this, we can rewrite the DT_VERNEED tag to DT_NULL (0), terminating > the dynamic table, effectively deleting all DT_VER* tags. DT_RELACOUNT is also > deleted. Fortunately its absence does not affect correctness. > This requires binary patching > > ... > 0x000000006ffffffb (FLAGS_1) Flags: NOW > - 0x000000006ffffffe (VERNEED) 0x8ef0 > - 0x000000006fffffff (VERNEEDNUM) 5 >...
Targeting old glibc
2020 Nov 11
2
Targeting old glibc
It did partially fix the issue but there is still one problem: llvm-objdump -sx gives: Version References: required from libpthread.so.0: 0x09691a75 0x00 05 GLIBC_2.2.5 0x09691972 0x00 09 GLIBC_2.3.2 0x09691973 0x00 07 GLIBC_2.3.3 0x06969192 0x00 12 GLIBC_2.12 required from libdl.so.2: 0x09691a75 0x00 21 GLIBC_2.2.5 required from libuuid.so.1: 0x09da27b0 0x00 19
Targeting old glibc
2020 Nov 11
0
Targeting old glibc
...content so at runtime glibc ld.so will error "unsupported version 0 of Verneed record". Thus we need to drop the DT_VERNEED tag as well. To achieve this, we can rewrite the DT_VERNEED tag to DT_NULL (0), terminating the dynamic table, effectively deleting all DT_VER* tags. DT_RELACOUNT is also deleted. Fortunately its absence does not affect correctness. This requires binary patching ... 0x000000006ffffffb (FLAGS_1) Flags: NOW - 0x000000006ffffffe (VERNEED) 0x8ef0 - 0x000000006fffffff (VERNEEDNUM) 5 - 0x000000006ffffff0 (VERSYM)...