[PATCH v6 0/3] RISC-V: Implement TLS Descriptors.
Tatsuyuki Ishi
ishitatsuyuki@gmail.com
Fri Mar 29 06:18:31 GMT 2024
This patchset implements TLS Descriptors (TLSDESC) for RISC-V targets, per
the ratified specification at [1].
Partial support for TLSDESC is in binutils trunk. In [2] there is
additional support for relaxation which is required to pass
tst-tls1-static. GCC needs to be patched with [3].
Passes binutils and gcc tests for rv32gcv and rv64gcv. For glibc I only
tested elf/ as other subsystems sometimes doesn't work well under qemu.
This contribution is made on behalf of Blue Whale Systems, which has
copyright assignment on file with the FSF.
v2: Fix end-of-file newlines.
v3: Fix segfaulting on the slow path of TLSDESC resolver.
Fix handling of lazy relocations.
v4: Fix compiler warnings.
Fix fast path stack alignment pointed out by Andrew.
Fix style issues pointed out by Adhemerval.
Include 2 missing prerequisite commits.
Update localplt list.
v5: Add stubs for save/restore of vector registers.
Add comments and reordered sections for readability in the TLSDESC assembly.
Add clobber test sequence for tst-gnu2-tls2.
v6: Fix R_RISCV_NUM.
Elaborate on the include guard commit (thanks Fangrui).
[1]: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/373
[2]: https://inbox.sourceware.org/binutils/20240220175556.304692-1-ishitatsuyuki@gmail.com/
[3]: https://inbox.sourceware.org/gcc-patches/20240329055239.29719-1-ishitatsuyuki@gmail.com/
Tatsuyuki Ishi (3):
RISC-V: Add include guard for dl-tls.h.
RISC-V: Add TLSDESC reloc definitions.
RISC-V: Implement TLS Descriptors.
elf/elf.h | 7 +-
sysdeps/riscv/Makefile | 10 +
sysdeps/riscv/dl-lookupcfg.h | 27 ++
sysdeps/riscv/dl-machine.h | 50 +++-
sysdeps/riscv/dl-tls.h | 4 +
sysdeps/riscv/dl-tlsdesc.S | 269 ++++++++++++++++++++
sysdeps/riscv/dl-tlsdesc.h | 48 ++++
sysdeps/riscv/linkmap.h | 1 +
sysdeps/riscv/preconfigure | 1 +
sysdeps/riscv/tlsdesc.c | 38 +++
sysdeps/riscv/tlsdesc.sym | 19 ++
sysdeps/riscv/tst-gnu2-tls2.c | 33 +++
sysdeps/unix/sysv/linux/riscv/localplt.data | 2 +
13 files changed, 507 insertions(+), 2 deletions(-)
create mode 100644 sysdeps/riscv/dl-lookupcfg.h
create mode 100644 sysdeps/riscv/dl-tlsdesc.S
create mode 100644 sysdeps/riscv/dl-tlsdesc.h
create mode 100644 sysdeps/riscv/tlsdesc.c
create mode 100644 sysdeps/riscv/tlsdesc.sym
create mode 100644 sysdeps/riscv/tst-gnu2-tls2.c
--
2.44.0
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