Commit nios2 port to master.

52 files changed, 2785 insertions, 0 deletions

diff --git a/sysdeps/nios2/Implies b/sysdeps/nios2/Implies
new file mode 100644
index 0000000000..387a0ca052
--- /dev/null
+++ b/sysdeps/nios2/Implies
@@ -0,0 +1,3 @@
+wordsize-32
+ieee754/dbl-64
+ieee754/flt-32
diff --git a/sysdeps/nios2/Makefile b/sysdeps/nios2/Makefile
new file mode 100644
index 0000000000..e4e88dafc2
--- /dev/null
+++ b/sysdeps/nios2/Makefile
@@ -0,0 +1,35 @@
+# Copyright (C) 1993-2015 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/>.
+
+pic-ccflag = -fpic
+
+# We don't support long doubles as a distinct type.  We don't need to set
+# this variable; it's here mostly for documentational purposes.
+long-double-fcts = no
+
+ifeq ($(subdir),soft-fp)
+sysdep_routines += $(filter-out sqrtsf2,$(gcc-single-routines)) \
+  $(filter-out sqrtdf2,$(gcc-double-routines))
+endif
+
+ifeq ($(subdir),csu)
+gen-as-const-headers += tcb-offsets.sym
+endif
+
+ifeq ($(subdir),debug)
+CFLAGS-backtrace.c += -funwind-tables
+endif
diff --git a/sysdeps/nios2/Subdirs b/sysdeps/nios2/Subdirs
new file mode 100644
index 0000000000..87eadf3024
--- /dev/null
+++ b/sysdeps/nios2/Subdirs
@@ -0,0 +1 @@
+soft-fp
diff --git a/sysdeps/nios2/Versions b/sysdeps/nios2/Versions
new file mode 100644
index 0000000000..48a23519d9
--- /dev/null
+++ b/sysdeps/nios2/Versions
@@ -0,0 +1,12 @@
+libc {
+  GLIBC_2.21 {
+    __adddf3; __addsf3; __divdf3; __divsf3; __eqdf2; __eqsf2; __extendsfdf2;
+    __fixdfdi; __fixdfsi; __fixsfdi; __fixsfsi;
+    __fixunsdfdi; __fixunsdfsi; __fixunssfdi; __fixunssfsi;
+    __floatdidf; __floatdisf; __floatsidf; __floatsisf;
+    __floatundidf; __floatundisf; __floatunsidf; __floatunsisf;
+    __gedf2; __gesf2; __gtdf2; __gtsf2; __ledf2; __lesf2; __ltdf2; __ltsf2;
+    __muldf3; __mulsf3; __nedf2; __nesf2; __negdf2; __negsf2;
+    __subdf3; __subsf3; __truncdfsf2; __unorddf2; __unordsf2;
+  }
+}
diff --git a/sysdeps/nios2/__longjmp.S b/sysdeps/nios2/__longjmp.S
new file mode 100644
index 0000000000..c5b7e1969e
--- /dev/null
+++ b/sysdeps/nios2/__longjmp.S
@@ -0,0 +1,80 @@
+/* longjmp for Nios II.
+   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 <jmpbuf-offsets.h>
+
+/* __longjmp(jmpbuf, val) */
+
+ENTRY (__longjmp)
+	mov	r2, r5
+	bne	r5, zero, 1f
+	movi	r2, 1
+1:
+#ifdef	PTR_DEMANGLE
+	PTR_MANGLE_GUARD (r3)
+	ldw	r5,  (JB_RA*4)(r4)
+	ldw	r6,  (JB_SP*4)(r4)
+	PTR_DEMANGLE (r5, r5, r3)
+	PTR_DEMANGLE (r6, r6, r3)
+#endif
+
+	cfi_def_cfa (r4, 0)
+	cfi_offset (r16, JB_R16*4)
+	cfi_offset (r17, JB_R17*4)
+	cfi_offset (r18, JB_R18*4)
+	cfi_offset (r19, JB_R19*4)
+	cfi_offset (r20, JB_R20*4)
+	cfi_offset (r21, JB_R21*4)
+	cfi_offset (r22, JB_R22*4)
+	cfi_offset (fp, JB_FP*4)
+#ifdef PTR_DEMANGLE
+	cfi_register (ra, r5)
+	cfi_register (sp, r7)
+#else
+	cfi_offset (ra, JB_RA*4)
+	cfi_offset (sp, JB_SP*4)
+#endif
+	ldw	r16, (JB_R16*4)(r4)
+	ldw	r17, (JB_R17*4)(r4)
+	ldw	r18, (JB_R18*4)(r4)
+	ldw	r19, (JB_R19*4)(r4)
+	ldw	r20, (JB_R20*4)(r4)
+	ldw	r21, (JB_R21*4)(r4)
+	ldw	r22, (JB_R22*4)(r4)
+	ldw	fp,  (JB_FP*4)(r4)
+#ifdef PTR_DEMANGLE
+	mov	ra, r5
+	mov	sp, r6
+#else
+	ldw	ra,  (JB_RA*4)(r4)
+	ldw	sp,  (JB_SP*4)(r4)
+#endif
+	cfi_same_value (r16)
+	cfi_same_value (r17)
+	cfi_same_value (r18)
+	cfi_same_value (r19)
+	cfi_same_value (r20)
+	cfi_same_value (r21)
+	cfi_same_value (r22)
+	cfi_same_value (fp)
+	cfi_same_value (ra)
+	cfi_same_value (sp)
+
+	ret
+END (__longjmp)
diff --git a/sysdeps/nios2/abort-instr.h b/sysdeps/nios2/abort-instr.h
new file mode 100644
index 0000000000..17502e4a70
--- /dev/null
+++ b/sysdeps/nios2/abort-instr.h
@@ -0,0 +1,2 @@
+/* An instruction which should crash any program is an unused trap.  */
+#define ABORT_INSTRUCTION asm ("trap 31")
diff --git a/sysdeps/nios2/backtrace.c b/sysdeps/nios2/backtrace.c
new file mode 100644
index 0000000000..27ce597b39
--- /dev/null
+++ b/sysdeps/nios2/backtrace.c
@@ -0,0 +1 @@
+#include <sysdeps/x86_64/backtrace.c>
diff --git a/sysdeps/nios2/bits/endian.h b/sysdeps/nios2/bits/endian.h
new file mode 100644
index 0000000000..164f9e4d78
--- /dev/null
+++ b/sysdeps/nios2/bits/endian.h
@@ -0,0 +1,12 @@
+/* The Nios II architecture has selectable endianness.  */
+
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
+#ifdef __nios2_big_endian__
+# define __BYTE_ORDER __BIG_ENDIAN
+#endif
+#ifdef __nios2_little_endian__
+# define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
diff --git a/sysdeps/nios2/bits/fenv.h b/sysdeps/nios2/bits/fenv.h
new file mode 100644
index 0000000000..1eca40dabe
--- /dev/null
+++ b/sysdeps/nios2/bits/fenv.h
@@ -0,0 +1,44 @@
+/* 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 _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+/* The Altera specified Nios II hardware FPU does not support exceptions,
+   nor does the software floating-point support.  */
+#define FE_ALL_EXCEPT	0
+
+/* Nios II supports only round-to-nearest.  The software
+   floating-point support also acts this way.  */
+enum
+  {
+    __FE_UNDEFINED = 0,
+
+    FE_TONEAREST =
+#define FE_TONEAREST	1
+      FE_TONEAREST,
+  };
+
+/* Type representing exception flags. */
+typedef unsigned int fexcept_t;
+
+/* Type representing floating-point environment.  */
+typedef unsigned int fenv_t;
+
+/* If the default argument is used we use this value.  */
+#define FE_DFL_ENV	((const fenv_t *) -1)
diff --git a/sysdeps/nios2/bits/link.h b/sysdeps/nios2/bits/link.h
new file mode 100644
index 0000000000..cd44add2da
--- /dev/null
+++ b/sysdeps/nios2/bits/link.h
@@ -0,0 +1,54 @@
+/* Machine-specific declarations for dynamic linker interface, Nios II version.
+   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/>.  */
+
+#ifndef	_LINK_H
+# error "Never include <bits/link.h> directly; use <link.h> instead."
+#endif
+
+/* Registers for entry into PLT on Nios II.  */
+typedef struct La_nios2_regs
+{
+  uint32_t lr_reg[4]; /* r4 through r7 */
+  uint32_t lr_ra;
+  uint32_t lr_sp;
+} La_nios2_regs;
+
+/* Return values for calls from PLT on Nios II.  */
+typedef struct La_nios2_retval
+{
+  uint32_t lrv_r2;
+  uint32_t lrv_r3;
+} La_nios2_retval;
+
+__BEGIN_DECLS
+
+extern Elf32_Addr la_nios2_gnu_pltenter (Elf32_Sym *__sym, unsigned int __ndx,
+					 uintptr_t *__refcook,
+					 uintptr_t *__defcook,
+					 La_nios2_regs *__regs,
+					 unsigned int *__flags,
+					 const char *__symname,
+					 long int *__framesizep);
+extern unsigned int la_nios2_gnu_pltexit (Elf32_Sym *__sym, unsigned int __ndx,
+					  uintptr_t *__refcook,
+					  uintptr_t *__defcook,
+					  const La_nios2_regs *__inregs,
+					  La_nios2_retval *__outregs,
+					  const char *symname);
+
+__END_DECLS
diff --git a/sysdeps/nios2/bits/setjmp.h b/sysdeps/nios2/bits/setjmp.h
new file mode 100644
index 0000000000..d9abeb5ac3
--- /dev/null
+++ b/sysdeps/nios2/bits/setjmp.h
@@ -0,0 +1,30 @@
+/* Define the machine-dependent type `jmp_buf'.  Nios II version.
+   Copyright (C) 1992-2015 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