RISC-V: Linux ABI

Linux-specific code that is required for maintaining ABI compatibility.
This doesn't contain the actual system call interface, that is split out
in order to avoid having a patch that's too big.

2018-01-29  Palmer Dabbelt  <palmer@sifive.com>

        * sysdeps/riscv/nptl/pthread-offsets.h: New file.
        * sysdeps/riscv/nptl/pthreaddef.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/fcntl.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/mman.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/dl-cache.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/flush-icache.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/getcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/init-first.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/makecontext.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/readelflib.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/register-dump.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/setcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/swapcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/cachectl.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/procfs.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/ucontext.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/user.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/ucontext-macros.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/ucontext_i.sym: Likewise.

1 files changed, 49 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/riscv/ucontext-macros.h b/sysdeps/unix/sysv/linux/riscv/ucontext-macros.h
new file mode 100644
index 0000000000..a73c3a9b04
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/riscv/ucontext-macros.h
@@ -0,0 +1,49 @@
+/* Macros for ucontext routines.
+   Copyright (C) 2017-2018 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/>.  */
+
+#ifndef _LINUX_RISCV_UCONTEXT_MACROS_H
+#define _LINUX_RISCV_UCONTEXT_MACROS_H
+
+#include <sysdep.h>
+#include <sys/asm.h>
+
+#include "ucontext_i.h"
+
+#define MCONTEXT_FSR (32 * SZFREG + MCONTEXT_FPREGS)
+
+#define SAVE_FP_REG(name, num, base)			\
+  FREG_S name, ((num) * SZFREG + MCONTEXT_FPREGS)(base)
+
+#define RESTORE_FP_REG(name, num, base)			\
+  FREG_L name, ((num) * SZFREG + MCONTEXT_FPREGS)(base)
+
+#define RESTORE_FP_REG_CFI(name, num, base)		\
+  RESTORE_FP_REG (name, num, base);			\
+  cfi_offset (name, (num) * SZFREG + MCONTEXT_FPREGS)
+
+#define SAVE_INT_REG(name, num, base)			\
+  REG_S name, ((num) * SZREG + MCONTEXT_GREGS)(base)
+
+#define RESTORE_INT_REG(name, num, base)		\
+  REG_L name, ((num) * SZREG + MCONTEXT_GREGS)(base)
+
+#define RESTORE_INT_REG_CFI(name, num, base)		\
+  RESTORE_INT_REG (name, num, base);			\
+  cfi_offset (name, (num) * SZREG + MCONTEXT_GREGS)
+
+#endif /* _LINUX_RISCV_UCONTEXT_MACROS_H */