Signed-off-by: Vineet Gupta <vgu...@synopsys.com>
---
ChangeLog | 12 ++
sysdeps/unix/sysv/linux/arc/cacheflush.c | 29 +++
sysdeps/unix/sysv/linux/arc/clone.S | 100 ++++++++++
sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h | 6 +
sysdeps/unix/sysv/linux/arc/kernel-features.h | 28 +++
sysdeps/unix/sysv/linux/arc/mmap_internal.h | 26 +++
sysdeps/unix/sysv/linux/arc/profil-counter.h | 2 +
sysdeps/unix/sysv/linux/arc/pt-vfork.S | 1 +
sysdeps/unix/sysv/linux/arc/sigaction.c | 69 +++++++
sysdeps/unix/sysv/linux/arc/syscall.S | 38 ++++
sysdeps/unix/sysv/linux/arc/sysdep.c | 33 ++++
sysdeps/unix/sysv/linux/arc/sysdep.h | 259 ++++++++++++++++++++++++++
sysdeps/unix/sysv/linux/arc/vfork.S | 42 +++++
13 files changed, 645 insertions(+)
create mode 100644 sysdeps/unix/sysv/linux/arc/cacheflush.c
create mode 100644 sysdeps/unix/sysv/linux/arc/clone.S
create mode 100644 sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h
create mode 100644 sysdeps/unix/sysv/linux/arc/kernel-features.h
create mode 100644 sysdeps/unix/sysv/linux/arc/mmap_internal.h
create mode 100644 sysdeps/unix/sysv/linux/arc/profil-counter.h
create mode 100644 sysdeps/unix/sysv/linux/arc/pt-vfork.S
create mode 100644 sysdeps/unix/sysv/linux/arc/sigaction.c
create mode 100644 sysdeps/unix/sysv/linux/arc/syscall.S
create mode 100644 sysdeps/unix/sysv/linux/arc/sysdep.c
create mode 100644 sysdeps/unix/sysv/linux/arc/sysdep.h
create mode 100644 sysdeps/unix/sysv/linux/arc/vfork.S
diff --git a/ChangeLog b/ChangeLog
index b946f57204b6..08a3ac7e8064 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -44,6 +44,18 @@
* sysdeps/arc/nofpu/math-tests-exception.h: New file.
* sysdeps/arc/nofpu/math-tests-rounding.h: New file.
* sysdeps/arc/sfp-machine.h: New file.
+ * sysdeps/unix/sysv/linux/arc/cacheflush.c: New file.
+ * sysdeps/unix/sysv/linux/arc/clone.S: New file.
+ * sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h: New file.
+ * sysdeps/unix/sysv/linux/arc/kernel-features.h: New file.
+ * sysdeps/unix/sysv/linux/arc/mmap_internal.h: New file.
+ * sysdeps/unix/sysv/linux/arc/profil-counter.h: New file.
+ * sysdeps/unix/sysv/linux/arc/pt-vfork.S: New file.
+ * sysdeps/unix/sysv/linux/arc/sigaction.c: New file.
+ * sysdeps/unix/sysv/linux/arc/syscall.S: New file.
+ * sysdeps/unix/sysv/linux/arc/sysdep.c: New file.
+ * sysdeps/unix/sysv/linux/arc/sysdep.h: New file.
+ * sysdeps/unix/sysv/linux/arc/vfork.S: New file.
2018-12-17 Joseph Myers <jos...@codesourcery.com>
diff --git a/sysdeps/unix/sysv/linux/arc/cacheflush.c
b/sysdeps/unix/sysv/linux/arc/cacheflush.c
new file mode 100644
index 000000000000..7b14211eccf7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/cacheflush.c
@@ -0,0 +1,29 @@
+/* cacheflush system call for ARC Linux.
+ 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 <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/arc/clone.S
b/sysdeps/unix/sysv/linux/arc/clone.S
new file mode 100644
index 000000000000..04f2df5ef06d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/clone.S
@@ -0,0 +1,100 @@
+/* clone() implementation for ARC.
+ Copyright (C) 2008-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andrew Jenner <and...@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/>. */
+
+
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+#include <tcb-offsets.h>
+
+#define CLONE_SETTLS 0x00080000
+
+; int clone(int (*fn)(void *), void *child_stack,
+; int flags, void *arg, ...
+; /* pid_t *ptid, struct user_desc *tls, pid_t *ctid */);
+;
+; NOTE: I'm assuming that the last 3 args are NOT var-args and in case all
+; 3 are not relevant, caller will nevertheless pass those as NULL.
+; Current (Jul 2012) upstream powerpc/clone.S assumes similarly.
+; Our LTP (from 2007) doesn't seem to have tests to prove otherwise
+
+; clone syscall in kernel (ABI: CONFIG_CLONE_BACKWARDS)
+;
+; int sys_clone(unsigned long clone_flags,
+; unsigned long newsp,
+; int __user *parent_tidptr,
+; void *tls,
+; int __user *child_tidptr)
+
+ENTRY(__clone)
+ cmp r0, 0 ; @fn can't be NULL
+ cmp.ne r1, 0 ; @child_stack can't be NULL
+ bz .L__sys_err
+
+ ; save some of the orig args
+ ; r0 containg @fn will be clobbered AFTER syscall (with ret val)
+ ; rest are clobbered BEFORE syscall due to different arg ordering
+ mov r10, r0 ; @fn
+ mov r11, r3 ; @args
+ mov r12, r2 ; @clone_flags
+ mov r9, r5 ; @tls
+
+ ; adjust libc args for syscall
+
+ mov r0, r2 ; libc @flags is 1st syscall arg
+ mov r2, r4 ; libc @ptid
+ mov r3, r5 ; libc @tls
+ mov r4, r6 ; libc @ctid
+ mov r8, __NR_clone
+ ARC_TRAP_INSN
+
+ cmp r0, 0 ; return code : 0 new process, !0 parent
+ blt .L__sys_err2 ; < 0 (signed) error
+ jnz [blink] ; Parent returns
+
+ ; ----- child starts here ---------
+
+ ; Setup TP register (only recent kernels v4.19+ do that)
+ and.f 0, r12, CLONE_SETTLS
+ mov.nz r25, r9
+
+ ; child jumps off to @fn with @arg as argument, and returns here
+ jl.d [r10]
+ mov r0, r11
+
+ ; exit() with result from @fn (already in r0)
+ mov r8, __NR_exit
+ ARC_TRAP_INSN
+ ; In case it ever came back
+ flag 1
+
+.L__sys_err:
+ mov r0, -EINVAL
+.L__sys_err2:
+ ; (1) No need to make -ve kernel error code as positive errno
+ ; __syscall_error expects the -ve error code returned by kernel
+ ; (2) r0 still had orig -ve kernel error code
+ ; (3) Tail call to __syscall_error so we dont have to come back
+ ; here hence instead of jmp-n-link (reg push/pop) we do jmp
+ ; (4) No need to route __syscall_error via PLT, B is inherently
+ ; position independent
+ b __syscall_error
+PSEUDO_END (__clone)
+libc_hidden_def (__clone)
+weak_alias (__clone, clone)
diff --git a/sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h
b/sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h
new file mode 100644
index 000000000000..2fec69d21657
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h
@@ -0,0 +1,6 @@
+#define JMP_BUF_SIZE (32 + 1 + 1024/32) * 4
+#define SIGJMP_BUF_SIZE (32 + 1 + 1024/32) * 4
+#define JMP_BUF_ALIGN 4
+#define SIGJMP_BUF_ALIGN 4
+#define MASK_WAS_SAVED_OFFSET 32 * 4
+#define SAVED_MASK_OFFSET 33 * 4
diff --git a/sysdeps/unix/sysv/linux/arc/kernel-features.h
b/sysdeps/unix/sysv/linux/arc/kernel-features.h
new file mode 100644
index 000000000000..d8f667ca4759
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/kernel-features.h
@@ -0,0 +1,28 @@
+/* Set flags signalling availability of kernel features based on given
+ kernel version number.
+
+ 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/>. */
+
+/* The minimum supported kernel version for ARC is 3.9,
+ guaranteeing many kernel features. */
+
+#include_next <kernel-features.h>
+
+#undef __ASSUME_CLONE_DEFAULT
+#define __ASSUME_CLONE_BACKWARDS 1
diff --git a/sysdeps/unix/sysv/linux/arc/mmap_internal.h
b/sysdeps/unix/sysv/linux/arc/mmap_internal.h
new file mode 100644
index 000000000000..3c8c55d57d0e
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/mmap_internal.h
@@ -0,0 +1,26 @@
+/* mmap - map files or devices into memory. Linux/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/>. */
+
+#ifndef MMAP_ARC_INTERNAL_H
+#define MMAP_ARC_INTERNAL_H
+
+#define MMAP2_PAGE_UNIT 8192ULL /* 8K page is default for ARC */
+
+#include_next <mmap_internal.h>
+
+#endif
diff --git a/sysdeps/unix/sysv/linux/arc/profil-counter.h
b/sysdeps/unix/sysv/linux/arc/profil-counter.h
new file mode 100644
index 000000000000..8a6a0bcf3d59
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/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/arc/pt-vfork.S
b/sysdeps/unix/sysv/linux/arc/pt-vfork.S
new file mode 100644
index 000000000000..65cc3823ac87
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/pt-vfork.S
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/alpha/pt-vfork.S>
diff --git a/sysdeps/unix/sysv/linux/arc/sigaction.c
b/sysdeps/unix/sysv/linux/arc/sigaction.c
new file mode 100644
index 000000000000..0a58e78f8834
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/sigaction.c
@@ -0,0 +1,69 @@
+/* ARC specific sigaction and signal restorer
+ Copyright (C) 1997-2018 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 <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/syscall.h>
+
+/*
+ * Default sigretrun stub if user doesn't specify SA_RESTORER
+ */
+static void __default_rt_sa_restorer(void)
+{
+ INTERNAL_SYSCALL_NCS(__NR_rt_sigreturn, , 0);
+}
+
+#define SA_RESTORER 0x04000000
+
+/* If @act is not NULL, change the action for @sig to @act.
+ If @oact is not NULL, put the old action for @sig in @oact. */
+int
+__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+{
+ struct sigaction kact;
+ const struct sigaction *arg;
+
+ /*
+ * SA_RESTORER is only relevant for act != NULL case
+ * (!act means caller only wants to know @oact)
+ */
+ if (act && !(act->sa_flags & SA_RESTORER)) {
+ kact.sa_restorer = __default_rt_sa_restorer;
+ kact.sa_flags = act->sa_flags | SA_RESTORER;
+
+ kact.sa_handler = act->sa_handler;
+ kact.sa_mask = act->sa_mask;
+
+ arg = &kact;
+ } else {
+ arg = act;
+ }
+
+ /*
+ * syscall also expects sizeof(sa_mask) and asm-generic kernel syscall
+ * ABI mandates it be 2 words (8 bytes below) although glibc defines
+ * sigset_to be much larger (1024 / 32 == 64 bytes)
+ */
+ return INLINE_SYSCALL(rt_sigaction, 4, sig, arg, oact, _NSIG / 8);
+}
+
+libc_hidden_def (__libc_sigaction)
+
+#include <nptl/sigaction.c>
diff --git a/sysdeps/unix/sysv/linux/arc/syscall.S
b/sysdeps/unix/sysv/linux/arc/syscall.S
new file mode 100644
index 000000000000..8f76fa43e95f
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/syscall.S
@@ -0,0 +1,38 @@
+/* syscall - indirect system call.
+ 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>
+
+ENTRY (syscall)
+ mov_s r8, r0
+ mov_s r0, r1
+ mov_s r1, r2
+ mov_s r2, r3
+ mov_s r3, r4
+#ifdef __ARC700__
+ mov r4, r5
+ mov r5, r6
+#else
+ mov_s r4, r5
+ mov_s r5, r6
+#endif
+
+ ARC_TRAP_INSN
+ brhi r0, -1024, .Lcall_syscall_err
+ j [blink]
+PSEUDO_END (syscall)
diff --git a/sysdeps/unix/sysv/linux/arc/sysdep.c
b/sysdeps/unix/sysv/linux/arc/sysdep.c
new file mode 100644
index 000000000000..d9bcc305b846
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/sysdep.c
@@ -0,0 +1,33 @@
+/* ARC wrapper for setting errno
+ Copyright (C) 1997-2018 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 <errno.h>
+
+/* All syscall handler come here to avoid generated code bloat due to
+ * GOT reference to errno_location or it's equivalent
+ */
+int __syscall_error(int err_no)
+{
+ __set_errno(-err_no);
+ return -1;
+}
+
+#if IS_IN (libc)
+hidden_def (__syscall_error)
+#endif
diff --git a/sysdeps/unix/sysv/linux/arc/sysdep.h
b/sysdeps/unix/sysv/linux/arc/sysdep.h
new file mode 100644
index 000000000000..39d1f03c3710
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/sysdep.h
@@ -0,0 +1,259 @@
+/* Assembler macros for ARC.
+ 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/>. */
+
+#ifndef _LINUX_ARC_SYSDEP_H
+#define _LINUX_ARC_SYSDEP_H 1
+
+#include <asm/unistd.h>
+#include <sysdeps/arc/sysdep.h>
+#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
+
+/* For RTLD_PRIVATE_ERRNO. */
+#include <dl-sysdep.h>
+
+#include <tls.h>
+
+#undef SYS_ify
+#define SYS_ify(syscall_name) __NR_##syscall_name
+
+#ifdef __ASSEMBLER__
+
+/* This is a "normal" system call stub: if there is an error,
+ it returns -1 and sets errno. */
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ PSEUDO_NOERRNO(name, syscall_name, args) ASM_LINE_SEP \
+ brhi r0, -1024, .Lcall_syscall_err ASM_LINE_SEP
+
+#define ret j [blink]
+
+# undef PSEUDO_END
+# define PSEUDO_END(name) \
+ SYSCALL_ERROR_HANDLER ASM_LINE_SEP \
+ END (name)
+
+/* --------- helper for SYSCALL_NOERRNO ----------- */
+
+/* This kind of system call stub never returns an error.
+ We return the return value register to the caller unexamined. */
+
+# undef PSEUDO_NOERRNO
+# define PSEUDO_NOERRNO(name, syscall_name, args) \
+ .text ASM_LINE_SEP \
+ ENTRY (name) ASM_LINE_SEP \
+ DO_CALL (syscall_name, args) ASM_LINE_SEP \
+
+/* return the return value register unexamined
+ * r0 is both syscall return reg and function return reg, so no need to do
+ * anything
+ */
+# define ret_NOERRNO \
+ j_s [blink] ASM_LINE_SEP
+
+# undef PSEUDO_END_NOERRNO
+# define PSEUDO_END_NOERRNO(name) \
+ END (name)
+
+/* --------- helper for SYSCALL_ERRVAL ----------- */
+
+/* This kind of system call stub returns the errno code as its return
+ value, or zero for success. We may massage the kernel's return value
+ to meet that ABI, but we never set errno here. */
+
+# undef PSEUDO_ERRVAL
+# define PSEUDO_ERRVAL(name, syscall_name, args) \
+ PSEUDO_NOERRNO(name, syscall_name, args) ASM_LINE_SEP
+
+/* don't set errno, return kernel error (in errno form) or zero */
+# define ret_ERRVAL \
+ rsub r0, r0, 0 ASM_LINE_SEP \
+ ret_NOERRNO
+
+# undef PSEUDO_END_ERRVAL
+# define PSEUDO_END_ERRVAL(name) \
+ END (name)
+
+
+/* To reduce the code footprint, we confine the actual errno access
+ * to single place in __syscall_error()
+ * this takes raw kernel error value, sets errno and returns -1
+ */
+#if IS_IN (libc)
+#define CALL_ERRNO_SETTER_C bl
PLTJMP(HIDDEN_JUMPTARGET(__syscall_error))
+#else
+#define CALL_ERRNO_SETTER_C bl PLTJMP(__syscall_error)
+#endif
+
+# define SYSCALL_ERROR_HANDLER \
+.Lcall_syscall_err: ASM_LINE_SEP \
+ st.a blink, [sp, -4] ASM_LINE_SEP \
+ cfi_adjust_cfa_offset (4) ASM_LINE_SEP \
+ cfi_rel_offset (blink, 0) ASM_LINE_SEP \
+ CALL_ERRNO_SETTER_C ASM_LINE_SEP \
+ ld.ab blink, [sp, 4] ASM_LINE_SEP \
+ cfi_adjust_cfa_offset (-4) ASM_LINE_SEP \
+ cfi_restore (blink) ASM_LINE_SEP \
+ j [blink]
+
+# define DO_CALL(syscall_name, args) \
+ mov r8, SYS_ify (syscall_name) ASM_LINE_SEP \
+ ARC_TRAP_INSN ASM_LINE_SEP
+
+#define ARC_TRAP_INSN trap_s 0
+
+#else /* !__ASSEMBLER__ */
+
+# define SINGLE_THREAD_BY_GLOBAL 1
+
+/* In order to get __set_errno() definition in INLINE_SYSCALL. */
+#include <errno.h>
+
+extern int __syscall_error (int);
+
+#if IS_IN (libc)
+hidden_proto (__syscall_error)
+#define CALL_ERRNO_SETTER "bl __syscall_error \n\t"
+#else
+#define CALL_ERRNO_SETTER "bl __syscall_error@plt \n\t"
+#endif
+
+
+/* Define a macro which expands into the inline wrapper code for a system
+ call. */
+#undef INLINE_SYSCALL
+#define INLINE_SYSCALL(name, nr_args, args...) \
+({ \
+ register int __res __asm__("r0"); \
+ __res = INTERNAL_SYSCALL_NCS(__NR_##name, , nr_args, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P ((__res), ), 0)) \
+ { \
+ asm volatile ("st.a blink, [sp, -4] \n\t" \
+ CALL_ERRNO_SETTER \
+ "ld.ab blink, [sp, 4] \n\t" \
+ :"+r" (__res) \
+ : \
+ :"r1","r2","r3","r4","r5","r6", \
+ "r7","r8","r9","r10","r11","r12"); \
+ } \
+ __res; \
+})
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+#undef INTERNAL_SYSCALL_ERRNO
+# define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
+/* -1 to -1023 are valid errno values */
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) > -1024U)
+
+#define ARC_TRAP_INSN "trap_s 0 \n\t"
+
+#undef INTERNAL_SYSCALL_RAW
+#define INTERNAL_SYSCALL_RAW(name, err, nr_args, args...) \
+({ \
+ /* Per ABI, r0 is 1st arg and return reg */ \
+ register int __ret __asm__("r0"); \
+ register int _sys_num __asm__("r8"); \
+ \
+ LOAD_ARGS_##nr_args (name, args) \
+ \
+ __asm__ volatile ( \
+ ARC_TRAP_INSN \
+ : "+r" (__ret) \
+ : "r"(_sys_num) ASM_ARGS_##nr_args \
+ : "memory"); \
+ \
+ __ret; \
+})
+
+/* Macros for setting up inline __asm__ input regs */
+#define ASM_ARGS_0
+#define ASM_ARGS_1 ASM_ARGS_0, "r" (__ret)
+#define ASM_ARGS_2 ASM_ARGS_1, "r" (_arg2)
+#define ASM_ARGS_3 ASM_ARGS_2, "r" (_arg3)
+#define ASM_ARGS_4 ASM_ARGS_3, "r" (_arg4)
+#define ASM_ARGS_5 ASM_ARGS_4, "r" (_arg5)
+#define ASM_ARGS_6 ASM_ARGS_5, "r" (_arg6)
+#define ASM_ARGS_7 ASM_ARGS_6, "r" (_arg7)
+
+/* Macros for converting sys-call wrapper args into sys call args */
+#define LOAD_ARGS_0(nm, arg) \
+ _sys_num = (int) (nm);
+
+#define LOAD_ARGS_1(nm, arg1) \
+ __ret = (int) (arg1); \
+ LOAD_ARGS_0 (nm, arg1)
+
+/*
+ * Note that the use of _tmpX might look superflous, however it is needed
+ * to ensure that register variables are not clobbered if arg happens to be
+ * a function call itself. e.g. sched_setaffinity() calling getpid() for arg2
+ *
+ * Also this specific order of recursive calling is important to segregate
+ * the tmp args evaluation (function call case described above) and assigment
+ * of register variables
+ */
+#define LOAD_ARGS_2(nm, arg1, arg2) \
+ int _tmp2 = (int) (arg2); \
+ LOAD_ARGS_1 (nm, arg1) \
+ register int _arg2 __asm__ ("r1") = _tmp2;
+
+#define LOAD_ARGS_3(nm, arg1, arg2, arg3) \
+ int _tmp3 = (int) (arg3); \
+ LOAD_ARGS_2 (nm, arg1, arg2) \
+ register int _arg3 __asm__ ("r2") = _tmp3;
+
+#define LOAD_ARGS_4(nm, arg1, arg2, arg3, arg4) \
+ int _tmp4 = (int) (arg4); \
+ LOAD_ARGS_3 (nm, arg1, arg2, arg3) \
+ register int _arg4 __asm__ ("r3") = _tmp4;
+
+#define LOAD_ARGS_5(nm, arg1, arg2, arg3, arg4, arg5) \
+ int _tmp5 = (int) (arg5); \
+ LOAD_ARGS_4 (nm, arg1, arg2, arg3, arg4) \
+ register int _arg5 __asm__ ("r4") = _tmp5;
+
+#define LOAD_ARGS_6(nm, arg1, arg2, arg3, arg4, arg5, arg6) \
+ int _tmp6 = (int) (arg6); \
+ LOAD_ARGS_5 (nm, arg1, arg2, arg3, arg4, arg5) \
+ register int _arg6 __asm__ ("r5") = _tmp6;
+
+#define LOAD_ARGS_7(nm, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
+ int _tmp7 = (int) (arg7); \
+ LOAD_ARGS_6 (nm, arg1, arg2, arg3, arg4, arg5, arg6) \
+ register int _arg7 __asm__ ("r6") = _tmp7;
+
+#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)
+
+/* Pointer mangling not yet supported */
+# define PTR_MANGLE(var) (void) (var)
+# define PTR_DEMANGLE(var) (void) (var)
+
+#endif /* !__ASSEMBLER__ */
+
+#endif /* linux/arc/sysdep.h */
diff --git a/sysdeps/unix/sysv/linux/arc/vfork.S
b/sysdeps/unix/sysv/linux/arc/vfork.S
new file mode 100644
index 000000000000..6d7f63c9900b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/vfork.S
@@ -0,0 +1,42 @@
+/* vfork for ARC Linux.
+ 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 <sys/syscall.h>
+#include <sysdep.h>
+#include <tcb-offsets.h>
+#define _SIGNAL_H
+#include <bits/signum.h> /* For SIGCHLD */
+
+#define CLONE_VM 0x00000100
+#define CLONE_VFORK 0x00004000
+#define CLONE_FLAGS_FOR_VFORK (CLONE_VM|CLONE_VFORK|SIGCHLD)
+
+ENTRY(__vfork)
+ mov r0, CLONE_FLAGS_FOR_VFORK
+ mov_s r1, sp
+ mov r8, __NR_clone
+ ARC_TRAP_INSN
+
+ cmp r0, 0
+ jge [blink] ; child continues
+
+ b __syscall_error
+PSEUDO_END (__vfork)
+libc_hidden_def (__vfork)
+
+weak_alias (__vfork, vfork)
--
2.7.4
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