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[PATCH v3 2/4] Nios II port re-submission, sysdeps/unix/sysv/linux/nios2
- From: Chung-Lin Tang <cltang at codesourcery dot com>
- To: GNU C Library <libc-alpha at sourceware dot org>
- Cc: "Joseph S. Myers" <joseph at codesourcery dot com>
- Date: Sat, 10 Jan 2015 02:06:32 +0800
- Subject: [PATCH v3 2/4] Nios II port re-submission, sysdeps/unix/sysv/linux/nios2
- Authentication-results: sourceware.org; auth=none
The sysdeps/unix/sysv/linux/nios2 portions; version symbol is set at
GLIBC_2.21.
2015-01-09 Chung-Lin Tang <cltang@codesourcery.com>
Sandra Loosemore <sandra@codesourcery.com>
Andrew Jenner <andrew@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
Nathan Sidwell <nathan@codesourcery.com>
* sysdeps/unix/sysv/linux/nios2/Implies: New file.
* sysdeps/unix/sysv/linux/nios2/Makefile: New file.
* sysdeps/unix/sysv/linux/nios2/Versions: New file.
* sysdeps/unix/sysv/linux/nios2/arch-fork.h: New file.
* sysdeps/unix/sysv/linux/nios2/bits/atomic.h: New file.
* sysdeps/unix/sysv/linux/nios2/bits/mman.h: New file.
* sysdeps/unix/sysv/linux/nios2/cacheflush.c: New file.
* sysdeps/unix/sysv/linux/nios2/clone.S: New file.
* sysdeps/unix/sysv/linux/nios2/configure: New generated file.
* sysdeps/unix/sysv/linux/nios2/configure.ac: New file.
* sysdeps/unix/sysv/linux/nios2/getcontext.S: New file.
* sysdeps/unix/sysv/linux/nios2/kernel-features.h: New file.
* sysdeps/unix/sysv/linux/nios2/kernel_rt_sigframe.h: New file.
* sysdeps/unix/sysv/linux/nios2/makecontext.c: New file.
* sysdeps/unix/sysv/linux/nios2/profil-counter.h: New file.
* sysdeps/unix/sysv/linux/nios2/setcontext.S: New file.
* sysdeps/unix/sysv/linux/nios2/shlib-versions: New file.
* sysdeps/unix/sysv/linux/nios2/sigcontextinfo.h: New file.
* sysdeps/unix/sysv/linux/nios2/swapcontext.S: New file.
* sysdeps/unix/sysv/linux/nios2/sys/cachectl.h: New file.
* sysdeps/unix/sysv/linux/nios2/sys/procfs.h: New file.
* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h: New file.
* sysdeps/unix/sysv/linux/nios2/sys/user.h: New file.
* sysdeps/unix/sysv/linux/nios2/syscall.S: New file.
* sysdeps/unix/sysv/linux/nios2/sysdep-cancel.h: New file.
* sysdeps/unix/sysv/linux/nios2/sysdep.S: New file.
* sysdeps/unix/sysv/linux/nios2/sysdep.h: New file.
* sysdeps/unix/sysv/linux/nios2/ucontext_i.sym: New file.
* sysdeps/unix/sysv/linux/nios2/vfork.S: New file.
diff --git a/sysdeps/unix/sysv/linux/nios2/Implies b/sysdeps/unix/sysv/linux/nios2/Implies
new file mode 100644
index 0000000..4d0478b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/Implies
@@ -0,0 +1,3 @@
+nios2/nptl
+unix/sysv/linux/generic/wordsize-32
+unix/sysv/linux/generic
diff --git a/sysdeps/unix/sysv/linux/nios2/Makefile b/sysdeps/unix/sysv/linux/nios2/Makefile
new file mode 100644
index 0000000..d0af9ec
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/Makefile
@@ -0,0 +1,13 @@
+ifeq ($(subdir),stdlib)
+gen-as-const-headers += ucontext_i.sym
+endif
+
+ifeq ($(subdir),misc)
+# MIPS/Tile-style cacheflush routine
+sysdep_headers += sys/cachectl.h
+sysdep_routines += cacheflush
+endif
+
+ifeq ($(subdir),nptl)
+libpthread-routines := $(filter-out pt-vfork,$(libpthread-routines))
+endif
diff --git a/sysdeps/unix/sysv/linux/nios2/Versions b/sysdeps/unix/sysv/linux/nios2/Versions
new file mode 100644
index 0000000..54bd224
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/Versions
@@ -0,0 +1,6 @@
+libc {
+ GLIBC_2.20 {
+ _flush_cache;
+ cacheflush;
+ }
+}
diff --git a/sysdeps/unix/sysv/linux/nios2/arch-fork.h b/sysdeps/unix/sysv/linux/nios2/arch-fork.h
new file mode 100644
index 0000000..23d497e
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/arch-fork.h
@@ -0,0 +1,33 @@
+/* ARCH_FORK definition for Linux fork implementation. Nios II version.
+ Copyright (C) 2005-2015 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/>. */
+
+#include <sched.h>
+#include <signal.h>
+#include <sysdep.h>
+#include <tls.h>
+
+/* Argument 1 - Clone flags.
+ 2 - Child stack pointer.
+ 3 - Parent tid pointer.
+ 4 - Child tid pointer.
+ 5 - New TLS area pointer. */
+
+#define ARCH_FORK() \
+ INLINE_SYSCALL (clone, 5, \
+ CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
+ NULL, NULL, &THREAD_SELF->tid, NULL)
diff --git a/sysdeps/unix/sysv/linux/nios2/bits/atomic.h b/sysdeps/unix/sysv/linux/nios2/bits/atomic.h
new file mode 100644
index 0000000..2329f74
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/bits/atomic.h
@@ -0,0 +1,92 @@
+/* Low-level functions for atomic operations. Nios II version.
+ Copyright (C) 2012-2015 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 _NIOS2_BITS_ATOMIC_H
+#define _NIOS2_BITS_ATOMIC_H 1
+
+#include <stdint.h>
+
+typedef int32_t atomic32_t;
+typedef uint32_t uatomic32_t;
+typedef int_fast32_t atomic_fast32_t;
+typedef uint_fast32_t uatomic_fast32_t;
+
+typedef intptr_t atomicptr_t;
+typedef uintptr_t uatomicptr_t;
+typedef intmax_t atomic_max_t;
+typedef uintmax_t uatomic_max_t;
+
+#define __HAVE_64B_ATOMICS 0
+#define USE_ATOMIC_COMPILER_BUILTINS 0
+
+#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
+ (abort (), (__typeof (*mem)) 0)
+#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
+ (abort (), (__typeof (*mem)) 0)
+#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
+ (abort (), (__typeof (*mem)) 0)
+
+#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
+ (abort (), 0)
+#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
+ (abort (), 0)
+#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
+ (abort (), 0)
+
+#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
+ ({ \
+ register int r2 asm ("r2"); \
+ register int* r4 asm ("r4") = (int*)(mem); \
+ register int r5 asm ("r5"); \
+ register int r6 asm ("r6") = (int)(newval); \
+ int retval, orig_oldval = (int)(oldval); \
+ long kernel_cmpxchg = 0x1004; \
+ while (1) \
+ { \
+ r5 = *r4; \
+ if (r5 != orig_oldval) \
+ { \
+ retval = r5; \
+ break; \
+ } \
+ asm volatile ("callr %1\n" \
+ : "=r" (r2) \
+ : "r" (kernel_cmpxchg), "r" (r4), "r" (r5), "r" (r6) \
+ : "ra", "memory"); \
+ if (!r2) { retval = orig_oldval; break; } \
+ } \
+ (__typeof (*(mem))) retval; \
+ })
+
+#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
+ ({ \
+ register int r2 asm ("r2"); \
+ register int *r4 asm ("r4") = (int*)(mem); \
+ register int r5 asm ("r5") = (int)(oldval); \
+ register int r6 asm ("r6") = (int)(newval); \
+ long kernel_cmpxchg = 0x1004; \
+ asm volatile ("callr %1\n" \
+ : "=r" (r2) \
+ : "r" (kernel_cmpxchg), "r" (r4), "r" (r5), "r" (r6) \
+ : "ra", "memory"); \
+ r2; \
+ })
+
+#define atomic_full_barrier() ({ asm volatile ("sync"); })
+
+#endif /* _NIOS2_BITS_ATOMIC_H */
diff --git a/sysdeps/unix/sysv/linux/nios2/bits/mman.h b/sysdeps/unix/sysv/linux/nios2/bits/mman.h
new file mode 100644
index 0000000..23e92ab
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/bits/mman.h
@@ -0,0 +1,42 @@
+/* Definitions for POSIX memory map interface. Linux/Nios II version.
+
+ Copyright (C) 1997-2015 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 _SYS_MMAN_H
+# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
+#endif
+
+/* The following definitions basically come from the kernel headers.
+ But the kernel header is not namespace clean. */
+
+/* These are Linux-specific. */
+#ifdef __USE_MISC
+# define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */
+# define MAP_DENYWRITE 0x00800 /* ETXTBSY */
+# define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */
+# define MAP_LOCKED 0x02000 /* Lock the mapping. */
+# define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
+# define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
+# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
+# define MAP_STACK 0x20000 /* Allocation is for a stack. */
+# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
+#endif
+
+/* Include generic Linux declarations. */
+#include <bits/mman-linux.h>
diff --git a/sysdeps/unix/sysv/linux/nios2/cacheflush.c b/sysdeps/unix/sysv/linux/nios2/cacheflush.c
new file mode 100644
index 0000000..739e6df
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/cacheflush.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2015 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/>. */
+
+#include <sysdep.h>
+#include <stddef.h>
+#include <unistd.h>
+
+/* Flush cache(s). */
+int
+_flush_cache (char *addr, const int nbytes, const int op)
+{
+ return INLINE_SYSCALL (cacheflush, 3, addr, nbytes, op);
+}
+weak_alias (_flush_cache, cacheflush)
diff --git a/sysdeps/unix/sysv/linux/nios2/clone.S b/sysdeps/unix/sysv/linux/nios2/clone.S
new file mode 100644
index 0000000..6d195f8
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/clone.S
@@ -0,0 +1,106 @@
+/* Copyright (C) 2008-2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andrew Jenner <andrew@codesourcery.com>, 2008.
+
+ 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/>. */
+
+/* clone() is even more special than fork() as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+#include <tcb-offsets.h>
+
+#define CLONE_VM 0x00000100
+#define CLONE_THREAD 0x00010000
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ void *parent_tidptr, void *tls, void *child_tidptr) */
+
+ .text
+ENTRY(__clone)
+ /* Sanity check arguments. */
+ movi r2, EINVAL
+ /* No NULL function pointers. */
+ beq r4, zero, SYSCALL_ERROR_LABEL
+ /* No NULL stack pointers. */
+ beq r5, zero, SYSCALL_ERROR_LABEL
+
+ subi r5, r5, 8 /* Reserve argument save space. */
+ stw r4, 4(r5) /* Save function pointer. */
+ stw r7, 0(r5) /* Save argument pointer. */
+
+ /* Load arguments. */
+ mov r4, r6
+ ldw r6, 0(sp)
+ ldw r7, 8(sp)
+ ldw r8, 4(sp)
+
+ /* Do the system call. */
+ movi r2, SYS_ify (clone)
+
+ /* End FDE now, because in the child the unwind info will be
+ wrong. */
+ cfi_endproc
+ trap
+
+ /* Check for errors. */
+ bne r7, zero, SYSCALL_ERROR_LABEL
+ /* See if we're on the newly created thread. */
+ beq r2, zero, thread_start
+ /* Successful return from the parent */
+ ret
+
+thread_start:
+ cfi_startproc
+ cfi_undefined (ra)
+
+ /* We expect the argument registers to be preserved across system
+ calls and across task cloning, so flags should be in r4 here. */
+ andhi r2, r4, %hi(CLONE_THREAD)
+ bne r2, zero, 2f
+ andi r3, r4, CLONE_VM
+ movi r2, -1
+ bne r3, zero, 3f
+ DO_CALL (getpid, 0)
+3:
+ stw r2, PID_OFFSET(r23)
+ stw r2, TID_OFFSET(r23)
+2:
+ ldw r5, 4(sp) /* Function pointer. */
+ ldw r4, 0(sp) /* Argument pointer. */
+ addi sp, sp, 8
+
+ /* Call the user's function. */
+ callr r5
+
+ /* _exit with the result. */
+ mov r4, r2
+#ifdef PIC
+ nextpc r22
+1: movhi r8, %hiadj(_gp_got - 1b)
+ addi r8, r8, %lo(_gp_got - 1b)
+ add r22, r22, r8
+ ldw r8, %call(HIDDEN_JUMPTARGET(_exit))(r22)
+ jmp r8
+#else
+ jmpi _exit
+#endif
+ cfi_endproc
+
+ cfi_startproc
+PSEUDO_END (__clone)
+weak_alias (__clone, clone)
diff --git a/sysdeps/unix/sysv/linux/nios2/configure b/sysdeps/unix/sysv/linux/nios2/configure
new file mode 100644
index 0000000..d5d117b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/configure
@@ -0,0 +1,4 @@
+# This file is generated from configure.in by Autoconf. DO NOT EDIT!
+ # Local configure fragment for sysdeps/unix/sysv/linux/nios2.
+
+arch_minimum_kernel=3.19.0
diff --git a/sysdeps/unix/sysv/linux/nios2/configure.ac b/sysdeps/unix/sysv/linux/nios2/configure.ac
new file mode 100644
index 0000000..a8ccc17
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/configure.ac
@@ -0,0 +1,4 @@
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# Local configure fragment for sysdeps/unix/sysv/linux/nios2.
+
+arch_minimum_kernel=3.19.0
diff --git a/sysdeps/unix/sysv/linux/nios2/getcontext.S b/sysdeps/unix/sysv/linux/nios2/getcontext.S
new file mode 100644
index 0000000..2d817e3
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/getcontext.S
@@ -0,0 +1,65 @@
+/* Copyright (C) 2015 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/>. */
+
+#include <sysdep.h>
+#include "ucontext_i.h"
+
+/* int getcontext (ucontext_t *ucp)
+
+ Returns 0 on success -1 and errno on failure.
+ */
+ .text
+ENTRY(__getcontext)
+ stw r16, (UCONTEXT_MCONTEXT + 16*4)(r4)
+ stw r17, (UCONTEXT_MCONTEXT + 17*4)(r4)
+ stw r18, (UCONTEXT_MCONTEXT + 18*4)(r4)
+ stw r19, (UCONTEXT_MCONTEXT + 19*4)(r4)
+ stw r20, (UCONTEXT_MCONTEXT + 20*4)(r4)
+ stw r21, (UCONTEXT_MCONTEXT + 21*4)(r4)
+ stw r22, (UCONTEXT_MCONTEXT + 22*4)(r4)
+ stw ra, (UCONTEXT_MCONTEXT + 24*4)(r4)
+ stw fp, (UCONTEXT_MCONTEXT + 25*4)(r4)
+ stw gp, (UCONTEXT_MCONTEXT + 26*4)(r4)
+ /* Store return address at place for EA. */
+ stw ra, (UCONTEXT_MCONTEXT + 28*4)(r4)
+ stw sp, (UCONTEXT_MCONTEXT + 29*4)(r4)
+ /* Store zero for return success. */
+ stw zero, (UCONTEXT_MCONTEXT + 2*4)(r4)
+
+ /* Store value "1" at uc_flags to recognize as getcontext created. */
+ movi r2, 1
+ stw r2, UCONTEXT_FLAGS(r4)
+
+ /* Store MCONTEXT_VERSION at first word of mcontext_t. */
+ movi r2, MCONTEXT_VERSION
+ stw r2, UCONTEXT_MCONTEXT(r4)
+
+ /* Get signal mask. */
+ /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
+ movi r7, _NSIG8
+ addi r6, r4, UCONTEXT_SIGMASK
+ mov r5, zero
+ movi r4, SIG_BLOCK
+ movi r2, SYS_ify (rt_sigprocmask)
+ trap
+ bne r7, zero, SYSCALL_ERROR_LABEL
+
+ mov r2, zero
+ ret
+
+PSEUDO_END(__getcontext)
+weak_alias(__getcontext, getcontext)
diff --git a/sysdeps/unix/sysv/linux/nios2/kernel-features.h b/sysdeps/unix/sysv/linux/nios2/kernel-features.h
new file mode 100644
index 0000000..f4e96a0
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/kernel-features.h
@@ -0,0 +1,31 @@
+/* Set flags signalling availability of kernel features based on given
+ kernel version number.
+
+ Copyright (C) 2009-2015 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/>. */
+
+#include <linux/version.h>
+
+/* The minimum supported kernel version for Nios II is 3.19.0,
+ guaranteeing many kernel features. */
+
+#define __ASSUME_ACCEPT4_SYSCALL 1
+#define __ASSUME_RECVMMSG_SYSCALL 1
+#define __ASSUME_SENDMMSG_SYSCALL 1
+
+#include_next <kernel-features.h>
diff --git a/sysdeps/unix/sysv/linux/nios2/kernel_rt_sigframe.h b/sysdeps/unix/sysv/linux/nios2/kernel_rt_sigframe.h
new file mode 100644
index 0000000..614d663
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/kernel_rt_sigframe.h
@@ -0,0 +1,25 @@
+/* Copyright (C) 2015 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 structure must have the same shape as the linux kernel
+ equivalent. */
+
+struct kernel_rt_sigframe
+{
+ siginfo_t info;
+ struct ucontext uc;
+};
diff --git a/sysdeps/unix/sysv/linux/nios2/makecontext.c b/sysdeps/unix/sysv/linux/nios2/makecontext.c
new file mode 100644
index 0000000..195562c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/makecontext.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 2015 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/>. */
+
+#include <sysdep.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <ucontext.h>
+
+/* makecontext sets up a stack and the registers for the
+ user context. The stack looks like this:
+
+ +-----------------------+
+ | padding as required |
+ +-----------------------+
+ sp -> | parameters 5 to n |
+ +-----------------------+
+
+ The registers are set up like this:
+ r4--r7 : parameter 1 to 4
+ r16 : uc_link
+ sp : stack pointer.
+*/
+
+void
+__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
+{
+ extern void __startcontext (void);
+ unsigned long *sp;
+ va_list ap;
+ int i;
+
+ sp = (unsigned long *)
+ ((uintptr_t) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
+
+ /* Allocate stack arguments. */
+ sp -= argc < 4 ? 0 : argc - 4;
+
+ /* Keep the stack aligned. */
+ sp = (unsigned long*) (((uintptr_t) sp) & -4L);
+
+ /* Init version field. */
+ ucp->uc_mcontext.version = 2;
+ /* Keep uc_link in r16. */
+ ucp->uc_mcontext.regs[15] = (uintptr_t) ucp->uc_link;
+ /* Return address points to __startcontext(). */
+ ucp->uc_mcontext.regs[23] = (uintptr_t) &__startcontext;
+ /* Frame pointer is null. */
+ ucp->uc_mcontext.regs[24] = (uintptr_t) 0;
+ /* Restart in user-space starting at 'func'. */
+ ucp->uc_mcontext.regs[27] = (uintptr_t) func;
+ /* Set stack pointer. */
+ ucp->uc_mcontext.regs[28] = (uintptr_t) sp;
+
+ va_start (ap, argc);
+ for (i = 0; i < argc; ++i)
+ if (i < 4)
+ ucp->uc_mcontext.regs[i + 3] = va_arg (ap, unsigned long);
+ else
+ sp[i - 4] = va_arg (ap, unsigned long);
+
+ va_end (ap);
+}
+
+weak_alias (__makecontext, makecontext)
diff --git a/sysdeps/unix/sysv/linux/nios2/profil-counter.h b/sysdeps/unix/sysv/linux/nios2/profil-counter.h
new file mode 100644
index 0000000..8a6a0bc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/profil-counter.h
@@ -0,0 +1,2 @@
+/* We can use the ix86 version. */
+#include <sysdeps/unix/sysv/linux/i386/profil-counter.h>
diff --git a/sysdeps/unix/sysv/linux/nios2/setcontext.S b/sysdeps/unix/sysv/linux/nios2/setcontext.S
new file mode 100644
index 0000000..90ed6d2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/setcontext.S
@@ -0,0 +1,102 @@
+/* Copyright (C) 2015 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/>. */
+
+#include <sysdep.h>
+#include "ucontext_i.h"
+
+/* int setcontext (const ucontext_t *ucp) */
+ .text
+ENTRY(__setcontext)
+ ldw r5, UCONTEXT_FLAGS(r4)
+ movi r6, 1
+ bne r5, r6, .Lsigreturn
+
+ mov r10, r4
+
+ /* Restore signal mask. */
+ /* rt_sigprocmask (SIG_SETMASK, NULL, &ucp->uc_sigmask, _NSIG8) */
+ movi r7, _NSIG8
+ addi r6, r4, UCONTEXT_SIGMASK
+ mov r5, zero
+ movi r4, SIG_SETMASK
+ movi r2, SYS_ify (rt_sigprocmask)
+ trap
+ bne r7, zero, SYSCALL_ERROR_LABEL
+
+ /* Restore argument registers, for the makecontext() case. */
+ ldw r4, (UCONTEXT_MCONTEXT + 4*4)(r10)
+ ldw r5, (UCONTEXT_MCONTEXT + 5*4)(r10)
+ ldw r6, (UCONTEXT_MCONTEXT + 6*4)(r10)
+ ldw r7, (UCONTEXT_MCONTEXT + 7*4)(r10)
+
+ ldw r16, (UCONTEXT_MCONTEXT + 16*4)(r10)
+ ldw r17, (UCONTEXT_MCONTEXT + 17*4)(r10)
+ ldw r18, (UCONTEXT_MCONTEXT + 18*4)(r10)
+ ldw r19, (UCONTEXT_MCONTEXT + 19*4)(r10)
+ ldw r20, (UCONTEXT_MCONTEXT + 20*4)(r10)
+ ldw r21, (UCONTEXT_MCONTEXT + 21*4)(r10)
+ ldw r22, (UCONTEXT_MCONTEXT + 22*4)(r10)
+ ldw ra, (UCONTEXT_MCONTEXT + 24*4)(r10)
+ ldw fp, (UCONTEXT_MCONTEXT + 25*4)(r10)
+ ldw gp, (UCONTEXT_MCONTEXT + 26*4)(r10)
+ /* Load address to continue execution. */
+ ldw r3, (UCONTEXT_MCONTEXT + 28*4)(r10)
+ ldw sp, (UCONTEXT_MCONTEXT + 29*4)(r10)
+
+ mov r2, zero
+ jmp r3
+
+.Lsigreturn:
+ addi sp, sp, -RT_SIGFRAME_SIZE
+ cfi_adjust_cfa_offset (RT_SIGFRAME_SIZE)
+
+ addi r2, sp, RT_SIGFRAME_UCONTEXT
+ movi r3, UCONTEXT_SIZE-4
+1:
+ add r6, r4, r3
+ ldw r5, 0(r6)
+ add r7, r2, r3
+ addi r3, r3, -4
+ stw r5, 0(r7)
+ bgt r3, zero, 1b
+
+ movi r2, SYS_ify (rt_sigreturn)
+ trap
+
+ addi sp, sp, RT_SIGFRAME_SIZE
+ cfi_adjust_cfa_offset (-RT_SIGFRAME_SIZE)
+ br SYSCALL_ERROR_LABEL
+
+PSEUDO_END (__setcontext)
+weak_alias (__setcontext, setcontext)
+
+ENTRY(__startcontext)
+ mov r4, r16
+ bne r4, zero, __setcontext
+
+ /* If uc_link == zero, call _exit. */
+#ifdef PIC
+ nextpc r22
+1: movhi r8, %hiadj(_gp_got - 1b)
+ addi r8, r8, %lo(_gp_got - 1b)
+ add r22, r22, r8
+ ldw r8, %call(HIDDEN_JUMPTARGET(_exit))(r22)
+ jmp r8
+#else
+ jmpi _exit
+#endif
+END(__startcontext)
diff --git a/sysdeps/unix/sysv/linux/nios2/shlib-versions b/sysdeps/unix/sysv/linux/nios2/shlib-versions
new file mode 100644
index 0000000..443fd4d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/shlib-versions
@@ -0,0 +1,2 @@
+DEFAULT GLIBC_2.21
+ld=ld-linux-nios2.so.1
diff --git a/sysdeps/unix/sysv/linux/nios2/sigcontextinfo.h b/sysdeps/unix/sysv/linux/nios2/sigcontextinfo.h
new file mode 100644
index 0000000..ef77d82
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sigcontextinfo.h
@@ -0,0 +1,35 @@
+/* Nios II definitions for signal handling calling conventions.
+ Copyright (C) 2015 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/>. */
+
+#include <sys/ucontext.h>
+#include "kernel-features.h"
+
+#define SIGCONTEXT siginfo_t *_si, struct ucontext *
+#define GET_PC(ctx) ((void *) (ctx)->uc_mcontext.regs[27])
+
+/* There is no reliable way to get the sigcontext unless we use a
+ three-argument signal handler. */
+#define __sigaction(sig, act, oact) ({ \
+ (act)->sa_flags |= SA_SIGINFO; \
+ (__sigaction) (sig, act, oact); \
+})
+
+#define sigaction(sig, act, oact) ({ \
+ (act)->sa_flags |= SA_SIGINFO; \
+ (sigaction) (sig, act, oact); \
+})
diff --git a/sysdeps/unix/sysv/linux/nios2/swapcontext.S b/sysdeps/unix/sysv/linux/nios2/swapcontext.S
new file mode 100644
index 0000000..f5673e7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/swapcontext.S
@@ -0,0 +1,124 @@
+/* Copyright (C) 2015 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/>. */
+
+#include <sysdep.h>
+#include "ucontext_i.h"
+
+/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
+ .text
+ENTRY(__swapcontext)
+
+ /* Same as getcontext(). */
+ stw r16, (UCONTEXT_MCONTEXT + 16*4)(r4)
+ stw r17, (UCONTEXT_MCONTEXT + 17*4)(r4)
+ stw r18, (UCONTEXT_MCONTEXT + 18*4)(r4)
+ stw r19, (UCONTEXT_MCONTEXT + 19*4)(r4)
+ stw r20, (UCONTEXT_MCONTEXT + 20*4)(r4)
+ stw r21, (UCONTEXT_MCONTEXT + 21*4)(r4)
+ stw r22, (UCONTEXT_MCONTEXT + 22*4)(r4)
+ stw ra, (UCONTEXT_MCONTEXT + 24*4)(r4)
+ stw fp, (UCONTEXT_MCONTEXT + 25*4)(r4)
+ stw gp, (UCONTEXT_MCONTEXT + 26*4)(r4)
+ /* Store return address at place for EA. */
+ stw ra, (UCONTEXT_MCONTEXT + 28*4)(r4)
+ stw sp, (UCONTEXT_MCONTEXT + 29*4)(r4)
+ /* Store zero for return success. */
+ stw zero, (UCONTEXT_MCONTEXT + 2*4)(r4)
+
+ /* Store value "1" at uc_flags to recognize as getcontext created. */
+ movi r2, 1
+ stw r2, UCONTEXT_FLAGS(r4)
+
+ /* Store MCONTEXT_VERSION at first word of mcontext_t. */
+ movi r2, MCONTEXT_VERSION
+ stw r2, UCONTEXT_MCONTEXT(r4)
+
+ /* Save ucp to non-argument syscall preserved register. */
+ mov r10, r5
+
+ /* Get signal mask. */
+ /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
+ movi r7, _NSIG8
+ addi r6, r4, UCONTEXT_SIGMASK
+ mov r5, zero
+ movi r4, SIG_BLOCK
+ movi r2, SYS_ify (rt_sigprocmask)
+ trap
+ bne r7, zero, SYSCALL_ERROR_LABEL
+
+
+ /* Same as setcontext(). */
+ ldw r5, UCONTEXT_FLAGS(r10)
+ movi r6, 1
+ bne r5, r6, .Lsigreturn
+
+ /* Restore signal mask. */
+ /* rt_sigprocmask (SIG_SETMASK, NULL, &ucp->uc_sigmask, _NSIG8) */
+ movi r7, _NSIG8
+ addi r6, r10, UCONTEXT_SIGMASK
+ mov r5, zero
+ movi r4, SIG_SETMASK
+ movi r2, SYS_ify (rt_sigprocmask)
+ trap
+ bne r7, zero, SYSCALL_ERROR_LABEL
+
+ /* Restore argument registers, for the makecontext() case. */
+ ldw r4, (UCONTEXT_MCONTEXT + 4*4)(r10)
+ ldw r5, (UCONTEXT_MCONTEXT + 5*4)(r10)
+ ldw r6, (UCONTEXT_MCONTEXT + 6*4)(r10)
+ ldw r7, (UCONTEXT_MCONTEXT + 7*4)(r10)
+
+ ldw r16, (UCONTEXT_MCONTEXT + 16*4)(r10)
+ ldw r17, (UCONTEXT_MCONTEXT + 17*4)(r10)
+ ldw r18, (UCONTEXT_MCONTEXT + 18*4)(r10)
+ ldw r19, (UCONTEXT_MCONTEXT + 19*4)(r10)
+ ldw r20, (UCONTEXT_MCONTEXT + 20*4)(r10)
+ ldw r21, (UCONTEXT_MCONTEXT + 21*4)(r10)
+ ldw r22, (UCONTEXT_MCONTEXT + 22*4)(r10)
+ ldw ra, (UCONTEXT_MCONTEXT + 24*4)(r10)
+ ldw fp, (UCONTEXT_MCONTEXT + 25*4)(r10)
+ ldw gp, (UCONTEXT_MCONTEXT + 26*4)(r10)
+ /* Load address to continue execution. */
+ ldw r3, (UCONTEXT_MCONTEXT + 28*4)(r10)
+ ldw sp, (UCONTEXT_MCONTEXT + 29*4)(r10)
+
+ mov r2, zero
+ jmp r3
+
+.Lsigreturn:
+ addi sp, sp, -RT_SIGFRAME_SIZE
+ cfi_adjust_cfa_offset (RT_SIGFRAME_SIZE)
+
+ addi r2, sp, RT_SIGFRAME_UCONTEXT
+ movi r3, UCONTEXT_SIZE-4
+1:
+ add r6, r4, r3
+ ldw r5, 0(r6)
+ add r7, r2, r3
+ addi r3, r3, -4
+ stw r5, 0(r7)
+ bgt r3, zero, 1b
+
+ movi r2, SYS_ify (rt_sigreturn)
+ trap
+
+ addi sp, sp, RT_SIGFRAME_SIZE
+ cfi_adjust_cfa_offset (-RT_SIGFRAME_SIZE)
+ br SYSCALL_ERROR_LABEL
+
+PSEUDO_END (__swapcontext)
+weak_alias (__swapcontext, swapcontext)
diff --git a/sysdeps/unix/sysv/linux/nios2/sys/cachectl.h b/sysdeps/unix/sysv/linux/nios2/sys/cachectl.h
new file mode 100644
index 0000000..ac992a2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sys/cachectl.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2015 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 _SYS_CACHECTL_H
+#define _SYS_CACHECTL_H 1
+
+#include <features.h>
+
+/* Get the kernel definition for the op bits. */
+#include <asm/cachectl.h>
+
+__BEGIN_DECLS
+
+#ifdef __USE_MISC
+extern int cacheflush (void *__addr, const int __nbytes, const int __op) __THROW;
+#endif
+extern int _flush_cache (char *__addr, const int __nbytes, const int __op) __THROW;
+
+__END_DECLS
+
+#endif /* sys/cachectl.h */
diff --git a/sysdeps/unix/sysv/linux/nios2/sys/procfs.h b/sysdeps/unix/sysv/linux/nios2/sys/procfs.h
new file mode 100644
index 0000000..2126503
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sys/procfs.h
@@ -0,0 +1,122 @@
+/* Copyright (C) 1996-2015 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 _SYS_PROCFS_H
+#define _SYS_PROCFS_H 1
+
+/* This is somewhat modelled after the file of the same name on SVR4
+ systems. It provides a definition of the core file format for ELF
+ used on Linux. It doesn't have anything to do with the /proc file
+ system, even though Linux has one.
+
+ Anyway, the whole purpose of this file is for GDB and GDB only.
+ Don't read too much into it. Don't use it for anything other than
+ GDB unless you know what you are doing. */
+
+#include <features.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/user.h>
+
+__BEGIN_DECLS
+
+/* Type for a general-purpose register. */
+typedef unsigned long elf_greg_t;
+
+/* And the whole bunch of them. We could have used `struct
+ user_regs' directly in the typedef, but tradition says that
+ the register set is an array, which does have some peculiar
+ semantics, so leave it that way. */
+#define ELF_NGREG (sizeof (struct user_regs) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+/* Register set for the floating-point registers. */
+typedef struct user_fpregs elf_fpregset_t;
+
+/* Signal info. */
+struct elf_siginfo
+ {
+ int si_signo; /* Signal number. */
+ int si_code; /* Extra code. */
+ int si_errno; /* Errno. */
+ };
+
+/* Definitions to generate Intel SVR4-like core files. These mostly
+ have the same names as the SVR4 types with "elf_" tacked on the
+ front to prevent clashes with Linux definitions, and the typedef
+ forms have been avoided. This is mostly like the SVR4 structure,
+ but more Linuxy, with things that Linux does not support and which
+ GDB doesn't really use excluded. */
+
+struct elf_prstatus
+ {
+ struct elf_siginfo pr_info; /* Info associated with signal. */
+ short int pr_cursig; /* Current signal. */
+ unsigned long int pr_sigpend; /* Set of pending signals. */
+ unsigned long int pr_sighold; /* Set of held signals. */
+ __pid_t pr_pid;
+ __pid_t pr_ppid;
+ __pid_t pr_pgrp;
+ __pid_t pr_sid;
+ struct timeval pr_utime; /* User time. */
+ struct timeval pr_stime; /* System time. */
+ struct timeval pr_cutime; /* Cumulative user time. */
+ struct timeval pr_cstime; /* Cumulative system time. */
+ elf_gregset_t pr_reg; /* GP registers. */
+ int pr_fpvalid; /* True if math copro being used. */
+ };
+
+
+#define ELF_PRARGSZ (80) /* Number of chars for args. */
+
+struct elf_prpsinfo
+ {
+ char pr_state; /* Numeric process state. */
+ char pr_sname; /* Char for pr_state. */
+ char pr_zomb; /* Zombie. */
+ char pr_nice; /* Nice val. */
+ unsigned long int pr_flag; /* Flags. */
+ unsigned short int pr_uid;
+ unsigned short int pr_gid;
+ int pr_pid, pr_ppid, pr_pgrp, pr_sid;
+ /* Lots missing */
+ char pr_fname[16]; /* Filename of executable. */
+ char pr_psargs[ELF_PRARGSZ]; /* Initial part of arg list. */
+ };
+
+/* The rest of this file provides the types for emulation of the
+ Solaris <proc_service.h> interfaces that should be implemented by
+ users of libthread_db. */
+
+/* Addresses. */
+typedef void *psaddr_t;
+
+/* Register sets. Linux has different names. */
+typedef elf_gregset_t prgregset_t;
+typedef elf_fpregset_t prfpregset_t;
+
+/* We don't have any differences between processes and threads,
+ therefore have only one PID type. */
+typedef __pid_t lwpid_t;
+
+/* Process status and info. In the end we do provide typedefs for them. */
+typedef struct elf_prstatus prstatus_t;
+typedef struct elf_prpsinfo prpsinfo_t;
+
+__END_DECLS
+
+#endif /* sys/procfs.h */
diff --git a/sysdeps/unix/sysv/linux/nios2/sys/ucontext.h b/sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
new file mode 100644
index 0000000..404c662
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
@@ -0,0 +1,48 @@
+/* Copyright (C) 2015 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/>. */
+
+/* System V/Nios II ABI compliant context switching support. */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H 1
+
+#include <features.h>
+#include <signal.h>
+
+/* These definitions must be in sync with the kernel. */
+
+#define MCONTEXT_VERSION 2
+
+/* Context to describe whole processor state. */
+typedef struct mcontext
+ {
+ int version;
+ unsigned long regs[32];
+ } mcontext_t;
+
+/* Userlevel context. */
+typedef struct ucontext
+ {
+ unsigned long uc_flags;
+ struct ucontext *uc_link;
+ stack_t uc_stack;
+ mcontext_t uc_mcontext;
+ __sigset_t uc_sigmask;
+ } ucontext_t;
+
+#endif /* sys/ucontext.h */
diff --git a/sysdeps/unix/sysv/linux/nios2/sys/user.h b/sysdeps/unix/sysv/linux/nios2/sys/user.h
new file mode 100644
index 0000000..323d8eb
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sys/user.h
@@ -0,0 +1,57 @@
+/* Copyright (C) 1998-2015 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 _SYS_USER_H
+#define _SYS_USER_H 1
+
+/* The whole purpose of this file is for GDB and GDB only. Don't read
+ too much into it. Don't use it for anything other than GDB unless
+ you know what you are doing. */
+
+struct user_fpregs
+{
+};
+
+struct user_regs
+{
+ unsigned long int uregs[49];
+};
+
+struct user
+{
+ struct user_regs regs; /* General registers */
+ int u_fpvalid; /* True if math co-processor being used. */
+
+ unsigned long int u_tsize; /* Text segment size (pages). */
+ unsigned long int u_dsize; /* Data segment size (pages). */
+ unsigned long int u_ssize; /* Stack segment size (pages). */
+
+ unsigned long start_code; /* Starting virtual address of text. */
+ unsigned long start_stack; /* Starting virtual address of stack. */
+
+ long int signal; /* Signal that caused the core dump. */
+ int reserved; /* No longer used */
+ struct user_regs *u_ar0; /* help gdb to find the general registers. */
+
+ unsigned long magic; /* uniquely identify a core file */
+ char u_comm[32]; /* User command that was responsible */
+ int u_debugreg[8];
+ struct user_fpregs u_fp; /* Floating point registers */
+ struct user_fpregs *u_fp0; /* help gdb to find the FP registers. */
+};
+
+#endif /* sys/user.h */
diff --git a/sysdeps/unix/sysv/linux/nios2/syscall.S b/sysdeps/unix/sysv/linux/nios2/syscall.S
new file mode 100644
index 0000000..a6c4a5f
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/syscall.S
@@ -0,0 +1,35 @@
+/* Copyright (C) 2005-2015 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/>. */
+
+#include <sysdep.h>
+
+/* We don't need a special syscall to implement syscall(). It won't work
+ reliably with 64-bit arguments (but that is true on many modern platforms).
+*/
+
+ENTRY (syscall)
+ mov r2, r4
+ mov r4, r5
+ mov r5, r6
+ mov r6, r7
+ ldw r7, 0(sp)
+ ldw r8, 4(sp)
+ ldw r9, 8(sp)
+ trap
+ bne r7, zero, SYSCALL_ERROR_LABEL
+ ret
+PSEUDO_END (syscall)
diff --git a/sysdeps/unix/sysv/linux/nios2/sysdep-cancel.h b/sysdeps/unix/sysv/linux/nios2/sysdep-cancel.h
new file mode 100644
index 0000000..a82dcf9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sysdep-cancel.h
@@ -0,0 +1,140 @@
+/* Copyright (C) 2003-2015 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/>. */
+
+#include <sysdep.h>
+#include <tls.h>
+#ifndef __ASSEMBLER__
+# include <nptl/pthreadP.h>
+#endif
+
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ .type __##syscall_name##_nocancel, @function; \
+ .globl __##syscall_name##_nocancel; \
+ __##syscall_name##_nocancel: \
+ cfi_startproc; \
+ DO_CALL (syscall_name, args); \
+ bne r7, zero, SYSCALL_ERROR_LABEL; \
+ ret; \
+ cfi_endproc; \
+ .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
+ ENTRY (name) \
+ SINGLE_THREAD_P(r2); \
+ bne r2, zero, pseudo_cancel; \
+ DO_CALL (syscall_name, args); \
+ bne r7, zero, SYSCALL_ERROR_LABEL; \
+ ret; \
+ pseudo_cancel: \
+ SAVESTK_##args; /* save syscall args and adjust stack */ \
+ SAVEREG(ra, 0); /* save return address */ \
+ SAVEREG(r22, 4); /* save GOT pointer */ \
+ nextpc r22; \
+1: movhi r2, %hiadj(_gp_got - 1b); \
+ addi r2, r2, %lo(_gp_got - 1b); \
+ add r22, r22, r2; \
+ CENABLE; \
+ callr r3; \
+ stw r2, 8(sp); /* save mask */ \
+ LOADARGS_##args; \
+ movi r2, SYS_ify(syscall_name); \
+ trap; \
+ stw r2, 12(sp); /* save syscall result */ \
+ stw r7, 16(sp); /* save syscall error flag */ \
+ ldw r4, 8(sp); /* pass mask as argument 1 */ \
+ CDISABLE; \
+ callr r3; \
+ ldw r7, 16(sp); /* restore syscall error flag */ \
+ ldw r2, 12(sp); /* restore syscall result */ \
+ ldw ra, 0(sp); /* restore return address */ \
+ ldw r22, 4(sp); /* restore GOT pointer */ \
+ RESTORESTK_##args; \
+ bne r7, zero, SYSCALL_ERROR_LABEL;
+
+
+# undef PSEUDO_END
+# define PSEUDO_END(sym) \
+ SYSCALL_ERROR_HANDLER \
+ END (sym)
+
+#define SAVEREG(REG, LOC) stw REG, LOC(sp); cfi_rel_offset (REG, LOC)
+#define SAVESTK(X) subi sp, sp, X; cfi_adjust_cfa_offset(X)
+#define SAVESTK_0 SAVESTK(20)
+#define SAVEARG_1 SAVEREG(r4, 20)
+#define SAVESTK_1 SAVESTK(24); SAVEARG_1
+#define SAVEARG_2 SAVEREG(r5, 24); SAVEARG_1
+#define SAVESTK_2 SAVESTK(28); SAVEARG_2
+#define SAVEARG_3 SAVEREG(r6, 28); SAVEARG_2
+#define SAVESTK_3 SAVESTK(32); SAVEARG_3
+#define SAVEARG_4 SAVEREG(r7, 32); SAVEARG_3
+#define SAVESTK_4 SAVESTK(36); SAVEARG_4
+#define SAVESTK_5 SAVESTK_4
+#define SAVESTK_6 SAVESTK_5
+
+#define LOADARGS_0
+#define LOADARGS_1 ldw r4, 20(sp)
+#define LOADARGS_2 LOADARGS_1; ldw r5, 24(sp)
+#define LOADARGS_3 LOADARGS_2; ldw r6, 28(sp)
+#define LOADARGS_4 LOADARGS_3; ldw r7, 32(sp)
+#define LOADARGS_5 LOADARGS_4; ldw r8, 36(sp)
+#define LOADARGS_6 LOADARGS_5; ldw r9, 40(sp)
+
+#define RESTORESTK(X) addi sp, sp, X; cfi_adjust_cfa_offset(-X)
+#define RESTORESTK_0 RESTORESTK(20)
+#define RESTORESTK_1 RESTORESTK(24)
+#define RESTORESTK_2 RESTORESTK(28)
+#define RESTORESTK_3 RESTORESTK(32)
+#define RESTORESTK_4 RESTORESTK(36)
+#define RESTORESTK_5 RESTORESTK(36)
+#define RESTORESTK_6 RESTORESTK(36)
+
+# if IS_IN (libpthread)
+# define CENABLE ldw r3, %call(__pthread_enable_asynccancel)(r22)
+# define CDISABLE ldw r3, %call(__pthread_disable_asynccancel)(r22)
+# elif IS_IN (librt)
+# define CENABLE ldw r3, %call(__librt_enable_asynccancel)(r22)
+# define CDISABLE ldw r3, %call(__librt_disable_asynccancel)(r22)
+# elif IS_IN (libc)
+# define CENABLE ldw r3, %call(__libc_enable_asynccancel)(r22)
+# define CDISABLE ldw r3, %call(__libc_disable_asynccancel)(r22)
+# else
+# error Unsupported library
+# endif
+
+# ifndef __ASSEMBLER__
+# define SINGLE_THREAD_P \
+ __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+ header.multiple_threads) \
+ == 0, 1)
+# else
+# define SINGLE_THREAD_P(reg) \
+ ldw reg, MULTIPLE_THREADS_OFFSET(r23)
+#endif
+
+#elif !defined __ASSEMBLER__
+
+# define SINGLE_THREAD_P 1
+# define NO_CANCELLATION 1
+
+#endif
+
+#ifndef __ASSEMBLER__
+# define RTLD_SINGLE_THREAD_P \
+ __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+ header.multiple_threads) == 0, 1)
+#endif
diff --git a/sysdeps/unix/sysv/linux/nios2/sysdep.S b/sysdeps/unix/sysv/linux/nios2/sysdep.S
new file mode 100644
index 0000000..93610cc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sysdep.S
@@ -0,0 +1,49 @@
+/* Copyright (C) 2015 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/>. */
+
+#include <sysdep.h>
+
+/* The following code is only used in the static library. In the shared
+ library, the error handling code is at the end of each function. */
+
+#ifndef PIC
+
+/* In the static library, the syscall stubs jump here when they detect
+ an error. */
+
+# undef CALL_MCOUNT
+# define CALL_MCOUNT /* Don't insert the profiling call, it clobbers r2. */
+
+# if IS_IN (libc)
+# define SYSCALL_ERROR_ERRNO __libc_errno
+# else
+# define SYSCALL_ERROR_ERRNO errno
+# endif
+ .text
+ENTRY (__syscall_error)
+ nextpc r3
+1:
+ movhi r8, %hiadj(_gp_got - 1b)
+ addi r8, r8, %lo(_gp_got - 1b)
+ add r3, r3, r8
+ ldw r3, %tls_ie(SYSCALL_ERROR_ERRNO)(r3)
+ add r3, r23, r3
+ stw r2, 0(r3)
+ movi r2, -1
+ ret
+END (__syscall_error)
+#endif
diff --git a/sysdeps/unix/sysv/linux/nios2/sysdep.h b/sysdeps/unix/sysv/linux/nios2/sysdep.h
new file mode 100644
index 0000000..869551d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/sysdep.h
@@ -0,0 +1,259 @@
+/* Copyright (C) 2000-2015 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_NIOS2_SYSDEP_H
+#define _LINUX_NIOS2_SYSDEP_H 1
+
+#include <asm/unistd.h>
+#include <sysdeps/unix/sysdep.h>
+#include <sysdeps/nios2/sysdep.h>
+#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
+
+/* For RTLD_PRIVATE_ERRNO. */
+#include <dl-sysdep.h>
+
+#include <tls.h>
+
+/* For Linux we can use the system call table in the header file
+ /usr/include/asm/unistd.h
+ of the kernel. But these symbols do not follow the SYS_* syntax
+ so we have to redefine the `SYS_ify' macro here. */
+#undef SYS_ify
+#define SYS_ify(syscall_name) __NR_##syscall_name
+
+#ifdef __ASSEMBLER__
+
+#define SYSCALL_ERROR_LABEL __local_syscall_error
+
+#undef PSEUDO
+#define PSEUDO(name, syscall_name, args) \
+ ENTRY (name) \
+ DO_CALL (syscall_name, args) \
+ bne r7, zero, SYSCALL_ERROR_LABEL; \
+
+#undef PSEUDO_END
+#define PSEUDO_END(name) \
+ SYSCALL_ERROR_HANDLER \
+ END (name)
+
+#undef PSEUDO_NOERRNO
+#define PSEUDO_NOERRNO(name, syscall_name, args) \
+ ENTRY (name) \
+ DO_CALL (syscall_name, args)
+
+#undef PSEUDO_END_NOERRNO
+#define PSEUDO_END_NOERRNO(name) \
+ END (name)
+
+#undef ret_NOERRNO
+#define ret_NOERRNO ret
+
+#undef DO_CALL
+#define DO_CALL(syscall_name, args) \
+ DOARGS_##args \
+ movi r2, SYS_ify(syscall_name); \
+ trap;
+
+#if defined(__PIC__) || defined(PIC)
+
+# if RTLD_PRIVATE_ERRNO
+
+# define SYSCALL_ERROR_HANDLER \
+ SYSCALL_ERROR_LABEL: \
+ nextpc r3; \
+1: \
+ movhi r8, %hiadj(rtld_errno - 1b); \
+ addi r8, r8, %lo(rtld_errno - 1b); \
+ add r3, r3, r8; \
+ stw r2, 0(r3); \
+ movi r2, -1; \
+ ret;
+
+# else
+
+# if IS_IN (libc)
+# define SYSCALL_ERROR_ERRNO __libc_errno
+# else
+# define SYSCALL_ERROR_ERRNO errno
+# endif
+# define SYSCALL_ERROR_HANDLER \
+ SYSCALL_ERROR_LABEL: \
+ nextpc r3; \
+1: \
+ movhi r8, %hiadj(_gp_got - 1b); \
+ addi r8, r8, %lo(_gp_got - 1b); \
+ add r3, r3, r8; \
+ ldw r3, %tls_ie(SYSCALL_ERROR_ERRNO)(r3); \
+ add r3, r23, r3; \
+ stw r2, 0(r3); \
+ movi r2, -1; \
+ ret;
+
+# endif
+
+#else
+
+/* We can use a single error handler in the static library. */
+#define SYSCALL_ERROR_HANDLER \
+ SYSCALL_ERROR_LABEL: \
+ jmpi __syscall_error;
+
+#endif
+
+#define DOARGS_0 /* nothing */
+#define DOARGS_1 /* nothing */
+#define DOARGS_2 /* nothing */
+#define DOARGS_3 /* nothing */
+#define DOARGS_4 /* nothing */
+#define DOARGS_5 ldw r8, 0(sp);
+#define DOARGS_6 ldw r9, 4(sp); ldw r8, 0(sp);
+
+/* The function has to return the error code. */
+#undef PSEUDO_ERRVAL
+#define PSEUDO_ERRVAL(name, syscall_name, args) \
+ ENTRY (name) \
+ DO_CALL (syscall_name, args)
+
+#undef PSEUDO_END_ERRVAL
+#define PSEUDO_END_ERRVAL(name) \
+ END (name)
+
+#define ret_ERRVAL ret
+
+#else /* __ASSEMBLER__ */
+
+/* In order to get __set_errno() definition in INLINE_SYSCALL. */
+#include <errno.h>
+
+/* Define a macro which expands into the inline wrapper code for a system
+ call. */
+#undef INLINE_SYSCALL
+#define INLINE_SYSCALL(name, nr, args...) \
+ ({ INTERNAL_SYSCALL_DECL(err); \
+ unsigned int result_var = INTERNAL_SYSCALL (name, err, nr, args); \
+ if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) ) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err)); \
+ result_var = -1L; \
+ } \
+ (int) result_var; })
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) unsigned int err __attribute__((unused))
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) ((void) (val), (unsigned int) (err))
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) ((void) (err), val)
+
+#undef INTERNAL_SYSCALL_RAW
+#define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \
+ ({ unsigned int _sys_result; \
+ { \
+ /* Load argument values in temporary variables
+ to perform side effects like function calls
+ before the call-used registers are set. */ \
+ LOAD_ARGS_##nr (args) \
+ LOAD_REGS_##nr \
+ register int _r2 asm ("r2") = (int)(name); \
+ register int _err asm ("r7"); \
+ asm volatile ("trap" \
+ : "+r" (_r2), "=r" (_err) \
+ : ASM_ARGS_##nr \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result = _r2; \
+ err = _err; \
+ } \
+ (int) _sys_result; })
+
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ INTERNAL_SYSCALL_RAW(SYS_ify(name), err, nr, args)
+
+#undef INTERNAL_SYSCALL_NCS
+#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
+ INTERNAL_SYSCALL_RAW(number, err, nr, args)
+
+#define LOAD_ARGS_0()
+#define LOAD_REGS_0
+#define ASM_ARGS_0
+#define LOAD_ARGS_1(a1) \
+ LOAD_ARGS_0 () \
+ int __arg1 = (int) (a1);
+#define LOAD_REGS_1 \
+ register int _r4 asm ("r4") = __arg1; \
+ LOAD_REGS_0
+#define ASM_ARGS_1 "r" (_r4)
+#define LOAD_ARGS_2(a1, a2) \
+ LOAD_ARGS_1 (a1) \
+ int __arg2 = (int) (a2);
+#define LOAD_REGS_2 \
+ register int _r5 asm ("r5") = __arg2; \
+ LOAD_REGS_1
+#define ASM_ARGS_2 ASM_ARGS_1, "r" (_r5)
+#define LOAD_ARGS_3(a1, a2, a3) \
+ LOAD_ARGS_2 (a1, a2) \
+ int __arg3 = (int) (a3);
+#define LOAD_REGS_3 \
+ register int _r6 asm ("r6") = __arg3; \
+ LOAD_REGS_2
+#define ASM_ARGS_3 ASM_ARGS_2, "r" (_r6)
+#define LOAD_ARGS_4(a1, a2, a3, a4) \
+ LOAD_ARGS_3 (a1, a2, a3) \
+ int __arg4 = (int) (a4);
+#define LOAD_REGS_4 \
+ register int _r7 asm ("r7") = __arg4; \
+ LOAD_REGS_3
+#define ASM_ARGS_4 ASM_ARGS_3, "r" (_r7)
+#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
+ LOAD_ARGS_4 (a1, a2, a3, a4) \
+ int __arg5 = (int) (a5);
+#define LOAD_REGS_5 \
+ register int _r8 asm ("r8") = __arg5; \
+ LOAD_REGS_4
+#define ASM_ARGS_5 ASM_ARGS_4, "r" (_r8)
+#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
+ LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
+ int __arg6 = (int) (a6);
+#define LOAD_REGS_6 \
+ register int _r9 asm ("r9") = __arg6; \
+ LOAD_REGS_5
+#define ASM_ARGS_6 ASM_ARGS_5, "r" (_r9)
+
+#define __SYSCALL_CLOBBERS "memory"
+
+#endif /* __ASSEMBLER__ */
+
+/* Pointer mangling support. */
+#if IS_IN (rtld)
+/* We cannot use the thread descriptor because in ld.so we use setjmp
+ earlier than the descriptor is initialized. */
+#else
+# ifdef __ASSEMBLER__
+# define PTR_MANGLE_GUARD(guard) ldw guard, POINTER_GUARD(r23)
+# define PTR_MANGLE(dst, src, guard) xor dst, src, guard
+# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
+# else
+# define PTR_MANGLE(var) \
+ (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#endif
+
+
+#endif /* linux/nios2/sysdep.h */
diff --git a/sysdeps/unix/sysv/linux/nios2/ucontext_i.sym b/sysdeps/unix/sysv/linux/nios2/ucontext_i.sym
new file mode 100644
index 0000000..a844c96
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/ucontext_i.sym
@@ -0,0 +1,29 @@
+#include <inttypes.h>
+#include <signal.h>
+#include <stddef.h>
+#include <sys/ucontext.h>
+
+#include "kernel_rt_sigframe.h"
+
+SIG_BLOCK
+SIG_SETMASK
+
+_NSIG8 (_NSIG / 8)
+
+MCONTEXT_VERSION
+
+-- Offsets of the fields in the kernel rt_sigframe_t structure.
+#define rt_sigframe(member) offsetof (struct kernel_rt_sigframe, member)
+
+RT_SIGFRAME_SIZE sizeof (struct kernel_rt_sigframe)
+RT_SIGFRAME_UCONTEXT rt_sigframe (uc)
+
+-- Offsets of the fields in the ucontext_t structure.
+#define ucontext(member) offsetof (ucontext_t, member)
+
+UCONTEXT_FLAGS ucontext (uc_flags)
+UCONTEXT_LINK ucontext (uc_link)
+UCONTEXT_STACK ucontext (uc_stack)
+UCONTEXT_MCONTEXT ucontext (uc_mcontext)
+UCONTEXT_SIGMASK ucontext (uc_sigmask)
+UCONTEXT_SIZE sizeof (ucontext_t)
diff --git a/sysdeps/unix/sysv/linux/nios2/vfork.S b/sysdeps/unix/sysv/linux/nios2/vfork.S
new file mode 100644
index 0000000..cc3a016
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/vfork.S
@@ -0,0 +1,43 @@
+/* Copyright (C) 2005-2015 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/>. */
+
+#include <sysdep.h>
+#include <tcb-offsets.h>
+
+ENTRY(__vfork)
+
+ ldw r6, PID_OFFSET(r23)
+ sub r7, zero, r6
+ bne r7, zero, 2f
+ movhi r7, %hi(0x80000000)
+2:
+ stw r7, PID_OFFSET(r23)
+
+ movi r4, 0x4111 /* (CLONE_VM | CLONE_VFORK | SIGCHLD) */
+ mov r5, zero
+ DO_CALL (clone, 2)
+
+ beq r2, zero, 1f
+ stw r6, PID_OFFSET(r23)
+1:
+ bne r7, zero, SYSCALL_ERROR_LABEL
+ ret
+
+PSEUDO_END (__vfork)
+libc_hidden_def (__vfork)
+
+weak_alias (__vfork, vfork)