These are needed by the build scripts, but in RISC-V being empty is
enough.
* lib/linux/riscv64-mes-gcc/crti.c,
lib/linux/riscv64-mes-gcc/crtn.c,
lib/linux/riscv64-mes-tcc/crti.c,
lib/linux/riscv64-mes-tcc/crtn.c: New files.
At the moment tcc does not support assembler instructions
with C expression operands. As a workaround read values
directly from stack.
* lib/linux/riscv64-mes-tcc/_exit.c
* lib/linux/riscv64-mes-tcc/_write.c
* lib/linux/riscv64-mes-tcc/syscall.c
Adapted from -gcc but make assembly match tcc style assembly where the
offsets are received as an extra input argument:
sw a0, 9(t0)
Becomes:
sw a0, t0, 9
* lib/linux/riscv64-mes-tcc/_exit.c,
lib/linux/riscv64-mes-tcc/_write.c,
lib/linux/riscv64-mes-tcc/crt1.c,
lib/linux/riscv64-mes-tcc/exit-42.S,
lib/linux/riscv64-mes-tcc/hello-mes.S,
lib/linux/riscv64-mes-tcc/syscall-internal.c,
lib/linux/riscv64-mes-tcc/syscall.c: New files.
