Syscall table uses hardcoded numbers

[lpereira]

Syscall numbers vary between different architectures, so tables like this won't be portable for arches other than x86_64.

These tables can be built by running a script like this during build time:

echo "#include <sys/syscall.h>" | \
    cpp -dM | \
    grep '^#define __NR_' | \
    sed -r -n -e 's/^\#define[ \t]+__NR_([a-z0-9_]+)[ \t]+([0-9]+)(.*)/ [\2] = "\1",/p'

Which will produce something like:

 [247] = "waitid",
 [75] = "fdatasync",
 [245] = "mq_getsetattr",
 [204] = "sched_getaffinity",
 [42] = "connect",
 [281] = "epoll_pwait",
 [175] = "init_module",
 [176] = "delete_module",
 [258] = "mkdirat",
 [130] = "rt_sigsuspend",
 [257] = "openat",
(...)

(It can be easily tweaked to produce the inverted table, too.)

Calling cpp directly might not be the best thing to do, however, especially if you want to prepare this for cross-compilation. Should be possible to perform this pipeline mostly in CMake, though.