To make progress in the meantime, replace those 32 bits by the two instructions
mov r0,#0
mov r1,#0
which clear general registers r0 and r1. This is a guess that zeroes
mean "this CPU has no such hardware assist". The libcrypto software
will choose slower but equivalent code, instead of using
any special hardware assist.
How do I "replace" those 32 bits with instructions before the library is loaded
at run-time ?
If you have the source for libcrypto.so.1.1, which is in software package
openssl-1.1.0h
(or openssl-libs-1.1.0h depending on your Linux distro) then in file
crypto/armv4cpuid.pl
change to:
=====
_armv7_tick:
#ifdef __APPLE__
mrrc p15,0,r0,r1,c14 @ CNTPCT
#else
@ mrrc p15,1,r0,r1,c14 @ CNTVCT <<< COMMENTED OUT
mov r0,#0 @ replacement for valgrind-3.13
mov r1,#0 @ replacement for valgrind-3.13
#endif
bx lr
=====
Build from the modified source, and install the modified shared library.
If you don't have source, then use a hex (binary) editor such as hexedit.
Assemble a one-instruction program "mov r0,#0", then over-write the bytes
for "mrrc p15,1,r0,r1,cr14" with the bytes for "mov r0,#0". If the code
is 32-bit ARM mode, then that's all there is to do. If the code is 16-bit
Thumb mode, then over-write the second 16-bit word with "mov r1,#0".
Your initial report said "(thumb)", but perhaps that is inaccurate.
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