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[PATCH 03/21] ARC: ABI Implementation
- From: Vineet Gupta <vineet dot gupta1 at synopsys dot com>
- To: <libc-alpha at sourceware dot org>
- Cc: <linux-snps-arc at lists dot infradead dot org>, Vineet Gupta <vineet dot gupta1 at synopsys dot com>
- Date: Tue, 18 Dec 2018 13:04:25 -0800
- Subject: [PATCH 03/21] ARC: ABI Implementation
- References: <1545167083-16764-1-git-send-email-vgupta@synopsys.com>
This code deals with the ARC ABI.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
ChangeLog | 20 ++++++++++++
sysdeps/arc/__longjmp.S | 50 ++++++++++++++++++++++++++++
sysdeps/arc/abort-instr.h | 2 ++
sysdeps/arc/bits/endian.h | 12 +++++++
sysdeps/arc/bits/setjmp.h | 33 +++++++++++++++++++
sysdeps/arc/bsd-_setjmp.S | 1 +
sysdeps/arc/bsd-setjmp.S | 1 +
sysdeps/arc/crti.S | 77 ++++++++++++++++++++++++++++++++++++++++++++
sysdeps/arc/crtn.S | 56 ++++++++++++++++++++++++++++++++
sysdeps/arc/dl-runtime.c | 21 ++++++++++++
sysdeps/arc/dl-sysdep.h | 25 ++++++++++++++
sysdeps/arc/dl-trampoline.S | 72 +++++++++++++++++++++++++++++++++++++++++
sysdeps/arc/gccframe.h | 21 ++++++++++++
sysdeps/arc/gmp-mparam.h | 23 +++++++++++++
sysdeps/arc/jmpbuf-offsets.h | 46 ++++++++++++++++++++++++++
sysdeps/arc/jmpbuf-unwind.h | 47 +++++++++++++++++++++++++++
sysdeps/arc/machine-gmon.h | 33 +++++++++++++++++++
sysdeps/arc/memusage.h | 23 +++++++++++++
sysdeps/arc/setjmp.S | 64 ++++++++++++++++++++++++++++++++++++
sysdeps/arc/sysdep.h | 49 ++++++++++++++++++++++++++++
sysdeps/arc/tls-macros.h | 29 +++++++++++++++++
21 files changed, 705 insertions(+)
create mode 100644 sysdeps/arc/__longjmp.S
create mode 100644 sysdeps/arc/abort-instr.h
create mode 100644 sysdeps/arc/bits/endian.h
create mode 100644 sysdeps/arc/bits/setjmp.h
create mode 100644 sysdeps/arc/bsd-_setjmp.S
create mode 100644 sysdeps/arc/bsd-setjmp.S
create mode 100644 sysdeps/arc/crti.S
create mode 100644 sysdeps/arc/crtn.S
create mode 100644 sysdeps/arc/dl-runtime.c
create mode 100644 sysdeps/arc/dl-sysdep.h
create mode 100644 sysdeps/arc/dl-trampoline.S
create mode 100644 sysdeps/arc/gccframe.h
create mode 100644 sysdeps/arc/gmp-mparam.h
create mode 100644 sysdeps/arc/jmpbuf-offsets.h
create mode 100644 sysdeps/arc/jmpbuf-unwind.h
create mode 100644 sysdeps/arc/machine-gmon.h
create mode 100644 sysdeps/arc/memusage.h
create mode 100644 sysdeps/arc/setjmp.S
create mode 100644 sysdeps/arc/sysdep.h
create mode 100644 sysdeps/arc/tls-macros.h
diff --git a/ChangeLog b/ChangeLog
index 3ec6eb82d2fe..c2efdafa9861 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,26 @@
syscall-template file.
* stdlib/longlong.h: Fix asm constraints for ARC code.
* elf/elf.h: add defines for ARC.
+ * sysdeps/arc/__longjmp.S: New file.
+ * sysdeps/arc/abort-instr.h: New file.
+ * sysdeps/arc/bits/endian.h: New file.
+ * sysdeps/arc/bits/setjmp.h: New file.
+ * sysdeps/arc/bsd-_setjmp.S: New file.
+ * sysdeps/arc/bsd-setjmp.S: New file.
+ * sysdeps/arc/crti.S: New file.
+ * sysdeps/arc/crtn.S: New file.
+ * sysdeps/arc/dl-runtime.c: New file.
+ * sysdeps/arc/dl-sysdep.h: New file.
+ * sysdeps/arc/dl-trampoline.S: New file.
+ * sysdeps/arc/gccframe.h: New file.
+ * sysdeps/arc/gmp-mparam.h: New file.
+ * sysdeps/arc/jmpbuf-offsets.h: New file.
+ * sysdeps/arc/jmpbuf-unwind.h: New file.
+ * sysdeps/arc/machine-gmon.h: New file.
+ * sysdeps/arc/memusage.h: New file.
+ * sysdeps/arc/setjmp.S: New file.
+ * sysdeps/arc/sysdep.h: New file.
+ * sysdeps/arc/tls-macros.h: New file.
2018-12-17 Joseph Myers <joseph@codesourcery.com>
diff --git a/sysdeps/arc/__longjmp.S b/sysdeps/arc/__longjmp.S
new file mode 100644
index 000000000000..5ef271536bcc
--- /dev/null
+++ b/sysdeps/arc/__longjmp.S
@@ -0,0 +1,50 @@
+/* longjmp for ARC.
+ 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/>. */
+
+#include <sysdep.h>
+#include <jmpbuf-offsets.h>
+
+;@ r0 = jump buffer from which regs will be restored
+;@ r1 = value that setjmp( ) will return due to this longjmp
+
+ENTRY(__longjmp)
+
+ ld_s r13, [r0]
+ ld_s r14, [r0,4]
+ ld r15, [r0,8]
+ ld r16, [r0,12]
+ ld r17, [r0,16]
+ ld r18, [r0,20]
+ ld r19, [r0,24]
+ ld r20, [r0,28]
+ ld r21, [r0,32]
+ ld r22, [r0,36]
+ ld r23, [r0,40]
+ ld r24, [r0,44]
+ ld r25, [r0,48]
+
+ ld blink, [r0,60]
+ ld fp, [r0,52]
+ ld sp, [r0,56]
+
+ mov.f r0, r1 ; get the setjmp return value(due to longjmp) in place
+
+ j.d [blink] ; to caller of setjmp location, right after the call
+ mov.z r0, 1 ; can't let setjmp return 0 when it is due to longjmp
+
+END(__longjmp)
diff --git a/sysdeps/arc/abort-instr.h b/sysdeps/arc/abort-instr.h
new file mode 100644
index 000000000000..474098e9a819
--- /dev/null
+++ b/sysdeps/arc/abort-instr.h
@@ -0,0 +1,2 @@
+/* FLAG 1 is privilege mode only instruction, hence will crash any program */
+#define ABORT_INSTRUCTION asm ("flag 1")
diff --git a/sysdeps/arc/bits/endian.h b/sysdeps/arc/bits/endian.h
new file mode 100644
index 000000000000..88fbcf39a58a
--- /dev/null
+++ b/sysdeps/arc/bits/endian.h
@@ -0,0 +1,12 @@
+/* The ARC architecture has selectable endianness. */
+
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
+#ifdef __BIG_ENDIAN__
+# define __BYTE_ORDER __BIG_ENDIAN
+#endif
+#ifdef __LITTLE_ENDIAN__
+# define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
diff --git a/sysdeps/arc/bits/setjmp.h b/sysdeps/arc/bits/setjmp.h
new file mode 100644
index 000000000000..3a014955ee5a
--- /dev/null
+++ b/sysdeps/arc/bits/setjmp.h
@@ -0,0 +1,33 @@
+/* Define the machine-dependent type `jmp_buf'. ARC version.
+ Copyright (C) 1992-2018 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 _BITS_SETJMP_H
+#define _BITS_SETJMP_H 1
+
+#if !defined(_SETJMP_H) && !defined(_PTHREAD_H)
+# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
+#endif
+
+#ifndef __ASSEMBLER__
+
+/* Saves r13-r25 (callee-saved), fp (frame pointer), sp (stack pointer),
+ * blink (branch-n-link) */
+typedef int __jmp_buf[32];
+#endif
+
+#endif
diff --git a/sysdeps/arc/bsd-_setjmp.S b/sysdeps/arc/bsd-_setjmp.S
new file mode 100644
index 000000000000..4e6a2da560c4
--- /dev/null
+++ b/sysdeps/arc/bsd-_setjmp.S
@@ -0,0 +1 @@
+/* _setjmp is in setjmp.S */
diff --git a/sysdeps/arc/bsd-setjmp.S b/sysdeps/arc/bsd-setjmp.S
new file mode 100644
index 000000000000..1da848d2f1ee
--- /dev/null
+++ b/sysdeps/arc/bsd-setjmp.S
@@ -0,0 +1 @@
+/* setjmp is in setjmp.S */
diff --git a/sysdeps/arc/crti.S b/sysdeps/arc/crti.S
new file mode 100644
index 000000000000..8b823b54a29d
--- /dev/null
+++ b/sysdeps/arc/crti.S
@@ -0,0 +1,77 @@
+/* Special .init and .fini section support for ARC.
+ Copyright (C) 2012-2018 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ 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 <libc-symbols.h>
+#include <sysdep.h>
+
+#ifndef PREINIT_FUNCTION
+# define PREINIT_FUNCTION __gmon_start__
+#endif
+
+#ifndef PREINIT_FUNCTION_WEAK
+# define PREINIT_FUNCTION_WEAK 1
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+ weak_extern (PREINIT_FUNCTION)
+#else
+ .hidden PREINIT_FUNCTION
+#endif
+
+ .section .init
+ .align 4
+ .global _init
+ .type _init,@function
+_init:
+ st.a blink, [sp,-4]
+ st.a fp, [sp,-4]
+ mov fp, sp
+#if PREINIT_FUNCTION_WEAK
+ ld r0, [pcl, @PREINIT_FUNCTION@gotpc]
+ tst r0, r0
+ jlnz [r0]
+#else
+ bl PREINIT_FUNCTION
+#endif
+
+ .section .fini
+ .align 4
+ .global _fini
+ .type _fini,@function
+_fini:
+ st.a blink,[sp,-4]
+ st.a fp,[sp,-4]
+ mov fp,sp
+ .align 4
diff --git a/sysdeps/arc/crtn.S b/sysdeps/arc/crtn.S
new file mode 100644
index 000000000000..c6c58c5593c9
--- /dev/null
+++ b/sysdeps/arc/crtn.S
@@ -0,0 +1,56 @@
+/* Special .init and .fini section support for ARC.
+ Copyright (C) 2012-2018 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ 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/>. */
+
+ .section .init
+ .align 4
+ .global _init
+ .type _init,@function
+ ; EPILOGUE
+ ld.ab fp,[sp,4]
+ ld blink,[sp,0]
+ j.d [blink]
+ add sp,sp,4
+; .size _init,.-_init
+
+ .section .fini
+ .align 4
+ .global _fini
+ .type _fini,@function
+ ; EPILOGUE
+ ld.ab fp,[sp,4]
+ ld blink,[sp,0]
+ j.d [blink]
+ add sp,sp,4
+; .size _fini,.-_fini
diff --git a/sysdeps/arc/dl-runtime.c b/sysdeps/arc/dl-runtime.c
new file mode 100644
index 000000000000..76d39fab5ab8
--- /dev/null
+++ b/sysdeps/arc/dl-runtime.c
@@ -0,0 +1,21 @@
+/* PLT jump into resolver passes PC of PLTn, while _dl_fixup expects the
+ address of corresponding .rela.plt entry */
+
+#ifdef __A7__
+#define ARC_PLT_SIZE 12
+#else
+#define ARC_PLT_SIZE 16
+#endif
+
+#define reloc_index \
+({ \
+ unsigned long plt0 = D_PTR (l, l_info[DT_PLTGOT]); \
+ unsigned long pltn = reloc_arg; \
+ /* exclude PL0 and PLT1 */ \
+ unsigned long idx = (pltn - plt0)/ARC_PLT_SIZE - 2; \
+ idx; \
+})
+
+#define reloc_offset reloc_index * sizeof (PLTREL)
+
+#include <elf/dl-runtime.c>
diff --git a/sysdeps/arc/dl-sysdep.h b/sysdeps/arc/dl-sysdep.h
new file mode 100644
index 000000000000..a3e734c1020c
--- /dev/null
+++ b/sysdeps/arc/dl-sysdep.h
@@ -0,0 +1,25 @@
+/* System-specific settings for dynamic linker code. ARC version.
+ Copyright (C) 2009-2018 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/>. */
+
+#include_next <dl-sysdep.h>
+
+/* _dl_argv cannot be attribute_relro, because _dl_start_user
+ might write into it after _dl_start returns. */
+#define DL_ARGV_NOT_RELRO 1
+
+#define DL_EXTERN_PROTECTED_DATA
diff --git a/sysdeps/arc/dl-trampoline.S b/sysdeps/arc/dl-trampoline.S
new file mode 100644
index 000000000000..c704f0ff9a95
--- /dev/null
+++ b/sysdeps/arc/dl-trampoline.S
@@ -0,0 +1,72 @@
+/* PLT trampolines. ARC version.
+ Copyright (C) 2005-2018 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/>. */
+
+#include <sysdep.h>
+#include <libc-symbols.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+; Save the registers which resolver could possibly clobber
+; r0-r9: args to the function - symbol being resolved
+; r10-r12 are already clobbered by PLTn, PLT0 thus neednot be saved
+
+.macro SAVE_CALLER_SAVED
+ push_s r0
+ push_s r1
+ push_s r2
+ push_s r3
+ st.a r4, [sp, -4]
+ st.a r5, [sp, -4]
+ st.a r6, [sp, -4]
+ st.a r7, [sp, -4]
+ st.a r8, [sp, -4]
+ st.a r9, [sp, -4]
+ push_s blink
+.endm
+
+.macro RESTORE_CALLER_SAVED_BUT_R0
+ ld.ab blink,[sp, 4]
+ ld.ab r9, [sp, 4]
+ ld.ab r8, [sp, 4]
+ ld.ab r7, [sp, 4]
+ ld.ab r6, [sp, 4]
+ ld.ab r5, [sp, 4]
+ ld.ab r4, [sp, 4]
+ pop_s r3
+ pop_s r2
+ pop_s r1
+.endm
+
+; Upon entry, PLTn, which led us here, sets up the following regs
+; r11 = Module info (tpnt pointer as expected by resolver)
+; r12 = PC of the PLTn itself - needed by resolver to find
+; corresponding .rela.plt entry
+
+ENTRY(_dl_runtime_resolve)
+ ; args to func being resolved, which resolver might clobber
+ SAVE_CALLER_SAVED
+
+ mov_s r1, r12
+ bl.d _dl_fixup
+ mov r0, r11
+
+ RESTORE_CALLER_SAVED_BUT_R0
+ j_s.d [r0] ; r0 has resolved function addr
+ pop_s r0 ; restore first arg to resolved call
+END(_dl_runtime_resolve)
diff --git a/sysdeps/arc/gccframe.h b/sysdeps/arc/gccframe.h
new file mode 100644
index 000000000000..54a1225284b6
--- /dev/null
+++ b/sysdeps/arc/gccframe.h
@@ -0,0 +1,21 @@
+/* Definition of object in frame unwind info. ARC version.
+ 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/>. */
+
+#define FIRST_PSEUDO_REGISTER 40
+
+#include <sysdeps/generic/gccframe.h>
diff --git a/sysdeps/arc/gmp-mparam.h b/sysdeps/arc/gmp-mparam.h
new file mode 100644
index 000000000000..2b09517766e3
--- /dev/null
+++ b/sysdeps/arc/gmp-mparam.h
@@ -0,0 +1,23 @@
+/* gmp-mparam.h -- Compiler/machine parameter header file.
+
+Copyright (C) 2017-2018 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB. If not, see
+<http://www.gnu.org/licenses/>. */
+
+#include <sysdeps/generic/gmp-mparam.h>
+
+#define IEEE_DOUBLE_BIG_ENDIAN 0
diff --git a/sysdeps/arc/jmpbuf-offsets.h b/sysdeps/arc/jmpbuf-offsets.h
new file mode 100644
index 000000000000..c9cf4bc2e355
--- /dev/null
+++ b/sysdeps/arc/jmpbuf-offsets.h
@@ -0,0 +1,46 @@
+/* Private macros for accessing __jmp_buf contents. ARC version.
+ Copyright (C) 2006-2018 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/>. */
+
+/* Save offsets within __jmp_buf. */
+/* We don't use most of these symbols; they are here for documentation. */
+
+/* Callee Regs */
+#define JB_R13 0
+#define JB_R14 1
+#define JB_R15 2
+#define JB_R16 3
+#define JB_R17 4
+#define JB_R18 5
+#define JB_R19 6
+#define JB_R20 7
+#define JB_R21 8
+#define JB_R22 9
+#define JB_R23 10
+#define JB_R24 11
+#define JB_R25 12
+
+/* Frame Pointer, Stack Pointer, Branch-n-link */
+#define JB_FP 13
+#define JB_SP 14
+#define JB_BLINK 15
+
+/* We save space for some extra state to accommodate future changes. */
+#define JB_NUM 32 /* words */
+
+/* Helper for generic ____longjmp_chk(). */
+#define JB_FRAME_ADDRESS(buf) ((void *) (unsigned long) (buf[JB_SP]))
diff --git a/sysdeps/arc/jmpbuf-unwind.h b/sysdeps/arc/jmpbuf-unwind.h
new file mode 100644
index 000000000000..d87ac13b3416
--- /dev/null
+++ b/sysdeps/arc/jmpbuf-unwind.h
@@ -0,0 +1,47 @@
+/* Examine __jmp_buf for unwinding frames. ARC version.
+ Copyright (C) 2005-2018 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/>. */
+
+#include <setjmp.h>
+#include <jmpbuf-offsets.h>
+#include <stdint.h>
+#include <unwind.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
+
+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
+ ((void *) (address) < (void *) demangle (jmpbuf[JB_SP]))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
+
+static inline uintptr_t __attribute__ ((unused))
+_jmpbuf_sp (__jmp_buf jmpbuf)
+{
+ uintptr_t sp = jmpbuf[JB_SP];
+#ifdef PTR_DEMANGLE
+ PTR_DEMANGLE (sp);
+#endif
+ return sp;
+}
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+ ((uintptr_t) (_address) - (_adj) < (uintptr_t) (_jmpbuf_sp (_jmpbuf) - (_adj)))
+
+/* We use the normal longjmp for unwinding. */
+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
diff --git a/sysdeps/arc/machine-gmon.h b/sysdeps/arc/machine-gmon.h
new file mode 100644
index 000000000000..55facf77a858
--- /dev/null
+++ b/sysdeps/arc/machine-gmon.h
@@ -0,0 +1,33 @@
+/* Machine-dependent definitions for profiling support. ARC version.
+ Copyright (C) 1996-2018 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/>. */
+
+#include <sysdep.h>
+
+#define _MCOUNT_DECL(frompc, selfpc)
+static void __mcount_internal (unsigned long frompc, unsigned long selfpc)
+
+/* this is very simple as gcc does all the heavy lifting at _mcount call site
+ * - sets up caller's blink in r0, so frompc is setup correctly
+ * - preserve argument registers for original call */
+
+#define MCOUNT \
+void _mcount (void *frompc) \
+{ \
+ __mcount_internal ((unsigned long int) frompc, \
+ (unsigned long int) __builtin_return_address(0)); \
+}
diff --git a/sysdeps/arc/memusage.h b/sysdeps/arc/memusage.h
new file mode 100644
index 000000000000..536f1fdbf614
--- /dev/null
+++ b/sysdeps/arc/memusage.h
@@ -0,0 +1,23 @@
+/* Machine-specific definitions for memory usage profiling, ARC version.
+ Copyright (C) 2000-2018 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/>. */
+
+#define GETSP() ({ register uintptr_t stack_ptr asm ("sp"); stack_ptr; })
+
+#define uatomic32_t unsigned int
+
+#include <sysdeps/generic/memusage.h>
diff --git a/sysdeps/arc/setjmp.S b/sysdeps/arc/setjmp.S
new file mode 100644
index 000000000000..cbd44e538339
--- /dev/null
+++ b/sysdeps/arc/setjmp.S
@@ -0,0 +1,64 @@
+/* setjmp for ARC.
+ Copyright (C) 1991-2018 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/>. */
+
+
+#include <sysdep.h>
+
+;@ r0 = jump buffer into which regs will be saved
+ENTRY(setjmp)
+ b.d __sigsetjmp
+ mov r1, 1 ; save signals
+END(setjmp)
+
+;@ r0 = jump buffer into which regs will be saved
+ENTRY(_setjmp)
+ b.d __sigsetjmp
+ mov r1, 0 ; don't save signals
+END(_setjmp)
+libc_hidden_def(_setjmp)
+
+;@ r0 = jump buffer into which regs will be saved
+;@ r1 = do we need to save signals
+ENTRY(__sigsetjmp)
+
+ st_s r13, [r0]
+ st_s r14, [r0,4]
+ st r15, [r0,8]
+ st r16, [r0,12]
+ st r17, [r0,16]
+ st r18, [r0,20]
+ st r19, [r0,24]
+ st r20, [r0,28]
+ st r21, [r0,32]
+ st r22, [r0,36]
+ st r23, [r0,40]
+ st r24, [r0,44]
+ st r25, [r0,48]
+ st fp, [r0,52]
+ st sp, [r0,56]
+
+ ; make a note of where longjmp will return to.
+ ; that will be right next to this setjmp call-site which will be
+ ; contained in blink, since "C" caller of this routine will do
+ ; a branch-n-link
+
+ st blink, [r0,60]
+ b __sigjmp_save
+
+END(__sigsetjmp)
+libc_hidden_def(__sigsetjmp)
diff --git a/sysdeps/arc/sysdep.h b/sysdeps/arc/sysdep.h
new file mode 100644
index 000000000000..5c6e063d03fe
--- /dev/null
+++ b/sysdeps/arc/sysdep.h
@@ -0,0 +1,49 @@
+/* Assembler macros for ARC.
+ 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/>. */
+
+#include <sysdeps/generic/sysdep.h>
+
+#ifdef __ASSEMBLER__
+
+/* Syntactic details of assembler.
+ * One weirness is ; is not newline but comment
+ * Although # is also for comment
+ */
+
+#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
+
+#define ENTRY(name) \
+ .align 4 ASM_LINE_SEP \
+ .globl C_SYMBOL_NAME(name) ASM_LINE_SEP \
+ .type C_SYMBOL_NAME(name),%function ASM_LINE_SEP \
+ C_LABEL(name) ASM_LINE_SEP \
+ CALL_MCOUNT
+
+#undef END
+#define END(name) \
+ ASM_SIZE_DIRECTIVE(name)
+
+#ifdef SHARED
+#define PLTJMP(_x) _x##@plt
+#else
+#define PLTJMP(_x) _x
+#endif
+
+# define CALL_MCOUNT /* Do nothing for now. */
+
+#endif /* __ASSEMBLER__ */
diff --git a/sysdeps/arc/tls-macros.h b/sysdeps/arc/tls-macros.h
new file mode 100644
index 000000000000..51855edef6e7
--- /dev/null
+++ b/sysdeps/arc/tls-macros.h
@@ -0,0 +1,29 @@
+/* Macros to support TLS testing in times of missing compiler support. */
+
+/* For now */
+#define TLS_LD(x) TLS_IE(x)
+
+#define TLS_GD(x) \
+ ({ int *__result; \
+ __asm__ ("add r0, pcl, @" #x "@tlsgd \n" \
+ ".tls_gd_ld " #x "`bl __tls_get_addr@plt \n" \
+ "mov %0, r0 \n" \
+ : "=&r" (__result) \
+ ::"r0","r1","r2","r3","r4","r5","r6","r7", \
+ "r8","r9","r10","r11","r12"); \
+ __result; })
+
+#define TLS_LE(x) \
+ ({ int *__result; \
+ void *tp = __builtin_thread_pointer(); \
+ __asm__ ("add %0, %1, @" #x "@tpoff \n" \
+ : "=r" (__result) : "r"(tp)); \
+ __result; })
+
+#define TLS_IE(x) \
+ ({ int *__result; \
+ void *tp = __builtin_thread_pointer(); \
+ __asm__ ("ld %0, [pcl, @" #x "@tlsie] \n" \
+ "add %0, %1, %0 \n" \
+ : "=&r" (__result) : "r" (tp)); \
+ __result; })
--
2.7.4