4 - You need GCC 3.4 or later to compile the s390 port.
5 - To run valgrind a z10 machine or any later model is recommended.
6 Older machine models down to and including z990 may work but have
7 not been tested extensively.
12 - 31-bit client programs are not supported.
13 - Hexadecimal floating point is not supported.
14 - Transactional memory is not supported.
15 - Instructions operating on vector registers are not supported.
16 - memcheck, cachegrind, drd, helgrind, massif, lackey, and none are
18 - On machine models predating z10, cachegrind will assume a z10 cache
19 architecture. Otherwise, cachegrind will query the hosts cache system
20 and use those parameters.
21 - callgrind and all experimental tools are currently not supported.
22 - Some gcc versions use mvc to copy 4/8 byte values. This will affect
23 certain debug messages. For example, memcheck will complain about
24 4 one-byte reads/writes instead of just a single read/write.
25 - The transactional-execution facility is not supported; it is masked
27 - The vector facility is not supported; it is masked off from HWCAP.
32 Valgrind does not require that the host machine has the same hardware
33 facilities as the machine for which the client program was compiled.
34 This is convenient. If possible, the JIT compiler will translate the
35 client instructions according to the facilities available on the host.
36 This means, though, that probing for hardware facilities by issuing
37 instructions from that facility and observing whether SIGILL is thrown
38 may not work. As a consequence, programs that attempt to do so may
39 behave differently. It is believed that this is a rare use case.
44 Applications should be compiled with -fno-builtin to avoid
45 false positives due to builtin string operations when running memcheck.
50 (1) Linux for zSeries ELF ABI Supplement
51 http://refspecs.linuxfoundation.org/ELF/zSeries/index.html
52 (2) z/Architecture Principles of Operation
53 http://publibfi.boulder.ibm.com/epubs/pdf/dz9zr010.pdf
54 (3) z/Architecture Reference Summary
55 http://publibfi.boulder.ibm.com/epubs/pdf/dz9zs008.pdf