diff options
| author | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-29 10:25:58 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-29 10:25:58 -0800 |
| commit | 337126607ffdaf15cbc9ccf3a96e52d71333f191 (patch) | |
| tree | 2f679f705c498b558979fab9bc64446fa09e99cd /sysdeps/riscv/stackinfo.h | |
| parent | c776fa113da1f0d0cf83418e8937c0a8a4d83d3e (diff) | |
| download | glibc-337126607ffdaf15cbc9ccf3a96e52d71333f191.tar.gz glibc-337126607ffdaf15cbc9ccf3a96e52d71333f191.tar.xz glibc-337126607ffdaf15cbc9ccf3a96e52d71333f191.zip | |
RISC-V: Thread-Local Storage Support
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.
Diffstat (limited to 'sysdeps/riscv/stackinfo.h')
| -rw-r--r-- | sysdeps/riscv/stackinfo.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sysdeps/riscv/stackinfo.h b/sysdeps/riscv/stackinfo.h new file mode 100644 index 0000000000..5b4f91c6a1 --- /dev/null +++ b/sysdeps/riscv/stackinfo.h @@ -0,0 +1,33 @@ +/* Stack environment definitions for RISC-V. + Copyright (C) 2011-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +/* This file contains a bit of information about the stack allocation + of the processor. */ + +#ifndef _STACKINFO_H +#define _STACKINFO_H 1 + +#include <elf.h> + +/* On RISC-V the stack grows down. */ +#define _STACK_GROWS_DOWN 1 + +/* Default to a non-executable stack. */ +#define DEFAULT_STACK_PERMS (PF_R | PF_W) + +#endif /* stackinfo.h */ |