relocs against defined symbols are replaced by relative
relocs, when a GOT slot is created. But code relocs (usually
calls via PLT) use the plt_offset member of attr, not the got_offset
member, so the "huh" warning was triggered in the case of calls to
static functions (the code still worked).
So, for now just use the AUTO_GOT_PLT mechanism. We could also
emit a non-PLT reloc in the backend for calls to VT_STATIC functions
(like the x86-64 backend does) and do the same as for x86-64 in
build_got_entries (which transforms PLT32 into PC32 relocs, riscv
would transform CALL_PLT into CALL relocs). Maybe later.
* support loading sym addresses from GOT: important for weak syms,
fixes 104_inline. This is still incomplete, it only works
for taking the sym address, not for directly loading/storing into
such symbols (i.e. not for VT_LVAL)
* another op: '%'
* ELF flags: add EF_RISCV_FLOAT_ABI_DOUBLE, which is our ABI.
* implement compares, gtst and gsym/gjmp and add
* implement stores (simple cases)
* fix arg passing with more than one register arg, fix
loads to not always use 8byte loads
* add some predefined macros: __riscv, __riscv_xlen,
__SIZEOF_POINTER__ (needed by glibc header)
The first 5 tests of tests2 run now.
this is enough to let me link a tcctest.c compiled by GCC
using some current debian sid riscv64 system. It needs
linking against libgcc.a for various floating point TFmode
routines. The result runs.
