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This patch implements TLS support for RISC-V. We support all four
standard TLS addressing modes (LE, IE, LD, and GD) when running on
Linux via NPTL. There is a draft psABI document that defines our TLS
ABI here
https://github.com/riscv/riscv-elf-psabi-doc/blob/master/riscv-elf.md#thread-local-storage
2018-01-29 Palmer Dabbelt <palmer@sifive.com>
* sysdeps/riscv/dl-tls.h: New file.
* sysdeps/riscv/libc-tls.c: Likewise.
* sysdeps/riscv/nptl/tcb-offsets.sym: Likewise.
* sysdeps/riscv/nptl/tls.h: Likewise.
* sysdeps/riscv/stackinfo.h: Likewise.
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