libthr for RISC-V

[andrew]

lib/libthr/arch/riscv/include/pthread_md.h

65

Why + 0x10?

[br]

unmagic 0x10, which is TP_OFFSET

[br]

lib/libthr/arch/riscv/include/pthread_md.h

65

it is TP_OFFSET (architecture specific)

[andrew]

lib/libthr/arch/riscv/include/pthread_md.h

65

Why is it needed? rtld-elf already takes the size of struct tcb into account.

[br]

lib/libthr/arch/riscv/include/pthread_md.h

65

So compiler expects that tp register points to the first static TLS block. In variant I it is located just after struct tcb.
We do the same in lib/libc/riscv/gen/_set_tp.c