After firing up gdb, and tracing through a few combinations of static and
dynamically linked object files, I have determined that the segfaults were due
to usage of procedure linking tables
(.plt) with the statically linked process. The plt addresses are not corrected
when static loaded, but are corrected during dynamic linking. File
x86_64-gen.c, lines
630-634 were
#ifdef TCC_TARGET_PE
greloca(cur_text_section, vtop->sym, ind + 1, R_X86_64_PC32,
(int)(vtop->c.i-4));
#else
greloca(cur_text_section, vtop->sym, ind + 1, R_X86_64_PLT32,
(int)(vtop->c.i-4));
#endif
and are replaced by
greloca(cur_text_section, vtop->sym, ind + 1, R_X86_64_PC32,
(int)(vtop->c.i-4));
This restores correct static linking in uClibc-0-9.30 and musl environments.
Dynamic linking is
unaffected, and continues to use procedure link table jumps and calls.
I am going to test this against the current archive, and if happy, will push.
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