Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx> --- sysdeps/unix/sysv/linux/arc/arch-syscall.h | 317 ++++++++++++++++++ sysdeps/unix/sysv/linux/arc/bits/timesize.h | 21 ++ sysdeps/unix/sysv/linux/arc/clone.S | 98 ++++++ sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h | 6 + sysdeps/unix/sysv/linux/arc/kernel-features.h | 28 ++ sysdeps/unix/sysv/linux/arc/kernel_stat.h | 26 ++ sysdeps/unix/sysv/linux/arc/mmap_internal.h | 27 ++ sysdeps/unix/sysv/linux/arc/pt-vfork.S | 1 + sysdeps/unix/sysv/linux/arc/sigaction.c | 31 ++ sysdeps/unix/sysv/linux/arc/sigrestorer.S | 29 ++ sysdeps/unix/sysv/linux/arc/syscall.S | 33 ++ sysdeps/unix/sysv/linux/arc/syscalls.list | 3 + sysdeps/unix/sysv/linux/arc/sysctl.mk | 1 + sysdeps/unix/sysv/linux/arc/sysdep.c | 33 ++ sysdeps/unix/sysv/linux/arc/sysdep.h | 219 ++++++++++++ sysdeps/unix/sysv/linux/arc/vfork.S | 42 +++ 16 files changed, 915 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/arc/arch-syscall.h create mode 100644 sysdeps/unix/sysv/linux/arc/bits/timesize.h 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/kernel_stat.h create mode 100644 sysdeps/unix/sysv/linux/arc/mmap_internal.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/sigrestorer.S create mode 100644 sysdeps/unix/sysv/linux/arc/syscall.S create mode 100644 sysdeps/unix/sysv/linux/arc/syscalls.list create mode 100644 sysdeps/unix/sysv/linux/arc/sysctl.mk 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/sysdeps/unix/sysv/linux/arc/arch-syscall.h b/sysdeps/unix/sysv/linux/arc/arch-syscall.h new file mode 100644 index 000000000000..db25a17ad077 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/arch-syscall.h @@ -0,0 +1,317 @@ +/* AUTOGENERATED by update-syscall-lists.py. */ +#define __NR_accept 202 +#define __NR_accept4 242 +#define __NR_acct 89 +#define __NR_add_key 217 +#define __NR_adjtimex 171 +#define __NR_arc_gettls 246 +#define __NR_arc_settls 245 +#define __NR_arc_usr_cmpxchg 248 +#define __NR_bind 200 +#define __NR_bpf 280 +#define __NR_brk 214 +#define __NR_cacheflush 244 +#define __NR_capget 90 +#define __NR_capset 91 +#define __NR_chdir 49 +#define __NR_chroot 51 +#define __NR_clock_adjtime 266 +#define __NR_clock_adjtime64 405 +#define __NR_clock_getres 114 +#define __NR_clock_getres_time64 406 +#define __NR_clock_gettime 113 +#define __NR_clock_gettime64 403 +#define __NR_clock_nanosleep 115 +#define __NR_clock_nanosleep_time64 407 +#define __NR_clock_settime 112 +#define __NR_clock_settime64 404 +#define __NR_clone 220 +#define __NR_clone3 435 +#define __NR_close 57 +#define __NR_connect 203 +#define __NR_copy_file_range 285 +#define __NR_delete_module 106 +#define __NR_dup 23 +#define __NR_dup3 24 +#define __NR_epoll_create1 20 +#define __NR_epoll_ctl 21 +#define __NR_epoll_pwait 22 +#define __NR_eventfd2 19 +#define __NR_execve 221 +#define __NR_execveat 281 +#define __NR_exit 93 +#define __NR_exit_group 94 +#define __NR_faccessat 48 +#define __NR_fadvise64_64 223 +#define __NR_fallocate 47 +#define __NR_fanotify_init 262 +#define __NR_fanotify_mark 263 +#define __NR_fchdir 50 +#define __NR_fchmod 52 +#define __NR_fchmodat 53 +#define __NR_fchown 55 +#define __NR_fchownat 54 +#define __NR_fcntl64 25 +#define __NR_fdatasync 83 +#define __NR_fgetxattr 10 +#define __NR_finit_module 273 +#define __NR_flistxattr 13 +#define __NR_flock 32 +#define __NR_fremovexattr 16 +#define __NR_fsconfig 431 +#define __NR_fsetxattr 7 +#define __NR_fsmount 432 +#define __NR_fsopen 430 +#define __NR_fspick 433 +#define __NR_fstat64 80 +#define __NR_fstatat64 79 +#define __NR_fstatfs64 44 +#define __NR_fsync 82 +#define __NR_ftruncate64 46 +#define __NR_futex 98 +#define __NR_futex_time64 422 +#define __NR_get_mempolicy 236 +#define __NR_get_robust_list 100 +#define __NR_getcpu 168 +#define __NR_getcwd 17 +#define __NR_getdents64 61 +#define __NR_getegid 177 +#define __NR_geteuid 175 +#define __NR_getgid 176 +#define __NR_getgroups 158 +#define __NR_getitimer 102 +#define __NR_getpeername 205 +#define __NR_getpgid 155 +#define __NR_getpid 172 +#define __NR_getppid 173 +#define __NR_getpriority 141 +#define __NR_getrandom 278 +#define __NR_getresgid 150 +#define __NR_getresuid 148 +#define __NR_getrlimit 163 +#define __NR_getrusage 165 +#define __NR_getsid 156 +#define __NR_getsockname 204 +#define __NR_getsockopt 209 +#define __NR_gettid 178 +#define __NR_gettimeofday 169 +#define __NR_getuid 174 +#define __NR_getxattr 8 +#define __NR_init_module 105 +#define __NR_inotify_add_watch 27 +#define __NR_inotify_init1 26 +#define __NR_inotify_rm_watch 28 +#define __NR_io_cancel 3 +#define __NR_io_destroy 1 +#define __NR_io_getevents 4 +#define __NR_io_pgetevents 292 +#define __NR_io_pgetevents_time64 416 +#define __NR_io_setup 0 +#define __NR_io_submit 2 +#define __NR_io_uring_enter 426 +#define __NR_io_uring_register 427 +#define __NR_io_uring_setup 425 +#define __NR_ioctl 29 +#define __NR_ioprio_get 31 +#define __NR_ioprio_set 30 +#define __NR_kcmp 272 +#define __NR_kexec_file_load 294 +#define __NR_kexec_load 104 +#define __NR_keyctl 219 +#define __NR_kill 129 +#define __NR_lgetxattr 9 +#define __NR_linkat 37 +#define __NR_listen 201 +#define __NR_listxattr 11 +#define __NR_llistxattr 12 +#define __NR_llseek 62 +#define __NR_lookup_dcookie 18 +#define __NR_lremovexattr 15 +#define __NR_lsetxattr 6 +#define __NR_madvise 233 +#define __NR_mbind 235 +#define __NR_membarrier 283 +#define __NR_memfd_create 279 +#define __NR_migrate_pages 238 +#define __NR_mincore 232 +#define __NR_mkdirat 34 +#define __NR_mknodat 33 +#define __NR_mlock 228 +#define __NR_mlock2 284 +#define __NR_mlockall 230 +#define __NR_mmap2 222 +#define __NR_mount 40 +#define __NR_move_mount 429 +#define __NR_move_pages 239 +#define __NR_mprotect 226 +#define __NR_mq_getsetattr 185 +#define __NR_mq_notify 184 +#define __NR_mq_open 180 +#define __NR_mq_timedreceive 183 +#define __NR_mq_timedreceive_time64 419 +#define __NR_mq_timedsend 182 +#define __NR_mq_timedsend_time64 418 +#define __NR_mq_unlink 181 +#define __NR_mremap 216 +#define __NR_msgctl 187 +#define __NR_msgget 186 +#define __NR_msgrcv 188 +#define __NR_msgsnd 189 +#define __NR_msync 227 +#define __NR_munlock 229 +#define __NR_munlockall 231 +#define __NR_munmap 215 +#define __NR_name_to_handle_at 264 +#define __NR_nanosleep 101 +#define __NR_nfsservctl 42 +#define __NR_open_by_handle_at 265 +#define __NR_open_tree 428 +#define __NR_openat 56 +#define __NR_perf_event_open 241 +#define __NR_personality 92 +#define __NR_pidfd_open 434 +#define __NR_pidfd_send_signal 424 +#define __NR_pipe2 59 +#define __NR_pivot_root 41 +#define __NR_pkey_alloc 289 +#define __NR_pkey_free 290 +#define __NR_pkey_mprotect 288 +#define __NR_ppoll 73 +#define __NR_ppoll_time64 414 +#define __NR_prctl 167 +#define __NR_pread64 67 +#define __NR_preadv 69 +#define __NR_preadv2 286 +#define __NR_prlimit64 261 +#define __NR_process_vm_readv 270 +#define __NR_process_vm_writev 271 +#define __NR_pselect6 72 +#define __NR_pselect6_time64 413 +#define __NR_ptrace 117 +#define __NR_pwrite64 68 +#define __NR_pwritev 70 +#define __NR_pwritev2 287 +#define __NR_quotactl 60 +#define __NR_read 63 +#define __NR_readahead 213 +#define __NR_readlinkat 78 +#define __NR_readv 65 +#define __NR_reboot 142 +#define __NR_recvfrom 207 +#define __NR_recvmmsg 243 +#define __NR_recvmmsg_time64 417 +#define __NR_recvmsg 212 +#define __NR_remap_file_pages 234 +#define __NR_removexattr 14 +#define __NR_renameat 38 +#define __NR_renameat2 276 +#define __NR_request_key 218 +#define __NR_restart_syscall 128 +#define __NR_rseq 293 +#define __NR_rt_sigaction 134 +#define __NR_rt_sigpending 136 +#define __NR_rt_sigprocmask 135 +#define __NR_rt_sigqueueinfo 138 +#define __NR_rt_sigreturn 139 +#define __NR_rt_sigsuspend 133 +#define __NR_rt_sigtimedwait 137 +#define __NR_rt_sigtimedwait_time64 421 +#define __NR_rt_tgsigqueueinfo 240 +#define __NR_sched_get_priority_max 125 +#define __NR_sched_get_priority_min 126 +#define __NR_sched_getaffinity 123 +#define __NR_sched_getattr 275 +#define __NR_sched_getparam 121 +#define __NR_sched_getscheduler 120 +#define __NR_sched_rr_get_interval 127 +#define __NR_sched_rr_get_interval_time64 423 +#define __NR_sched_setaffinity 122 +#define __NR_sched_setattr 274 +#define __NR_sched_setparam 118 +#define __NR_sched_setscheduler 119 +#define __NR_sched_yield 124 +#define __NR_seccomp 277 +#define __NR_semctl 191 +#define __NR_semget 190 +#define __NR_semop 193 +#define __NR_semtimedop 192 +#define __NR_semtimedop_time64 420 +#define __NR_sendfile64 71 +#define __NR_sendmmsg 269 +#define __NR_sendmsg 211 +#define __NR_sendto 206 +#define __NR_set_mempolicy 237 +#define __NR_set_robust_list 99 +#define __NR_set_tid_address 96 +#define __NR_setdomainname 162 +#define __NR_setfsgid 152 +#define __NR_setfsuid 151 +#define __NR_setgid 144 +#define __NR_setgroups 159 +#define __NR_sethostname 161 +#define __NR_setitimer 103 +#define __NR_setns 268 +#define __NR_setpgid 154 +#define __NR_setpriority 140 +#define __NR_setregid 143 +#define __NR_setresgid 149 +#define __NR_setresuid 147 +#define __NR_setreuid 145 +#define __NR_setrlimit 164 +#define __NR_setsid 157 +#define __NR_setsockopt 208 +#define __NR_settimeofday 170 +#define __NR_setuid 146 +#define __NR_setxattr 5 +#define __NR_shmat 196 +#define __NR_shmctl 195 +#define __NR_shmdt 197 +#define __NR_shmget 194 +#define __NR_shutdown 210 +#define __NR_sigaltstack 132 +#define __NR_signalfd4 74 +#define __NR_socket 198 +#define __NR_socketpair 199 +#define __NR_splice 76 +#define __NR_statfs64 43 +#define __NR_statx 291 +#define __NR_swapoff 225 +#define __NR_swapon 224 +#define __NR_symlinkat 36 +#define __NR_sync 81 +#define __NR_sync_file_range 84 +#define __NR_syncfs 267 +#define __NR_sysfs 247 +#define __NR_sysinfo 179 +#define __NR_syslog 116 +#define __NR_tee 77 +#define __NR_tgkill 131 +#define __NR_timer_create 107 +#define __NR_timer_delete 111 +#define __NR_timer_getoverrun 109 +#define __NR_timer_gettime 108 +#define __NR_timer_gettime64 408 +#define __NR_timer_settime 110 +#define __NR_timer_settime64 409 +#define __NR_timerfd_create 85 +#define __NR_timerfd_gettime 87 +#define __NR_timerfd_gettime64 410 +#define __NR_timerfd_settime 86 +#define __NR_timerfd_settime64 411 +#define __NR_times 153 +#define __NR_tkill 130 +#define __NR_truncate64 45 +#define __NR_umask 166 +#define __NR_umount2 39 +#define __NR_uname 160 +#define __NR_unlinkat 35 +#define __NR_unshare 97 +#define __NR_userfaultfd 282 +#define __NR_utimensat 88 +#define __NR_utimensat_time64 412 +#define __NR_vhangup 58 +#define __NR_vmsplice 75 +#define __NR_wait4 260 +#define __NR_waitid 95 +#define __NR_write 64 +#define __NR_writev 66 diff --git a/sysdeps/unix/sysv/linux/arc/bits/timesize.h b/sysdeps/unix/sysv/linux/arc/bits/timesize.h new file mode 100644 index 000000000000..1259077c6412 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/bits/timesize.h @@ -0,0 +1,21 @@ +/* Bit size of the time_t type at glibc build time, general case. + Copyright (C) 2019-2020 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 <bits/wordsize.h> + +#define __TIMESIZE 64 diff --git a/sysdeps/unix/sysv/linux/arc/clone.S b/sysdeps/unix/sysv/linux/arc/clone.S new file mode 100644 index 000000000000..c5ba38541163 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/clone.S @@ -0,0 +1,98 @@ +/* clone() implementation for ARC. + Copyright (C) 2008-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andrew Jenner <andrew@xxxxxxxxxxxxxxxx>, 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 + <https://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. + + clone syscall in kernel (ABI: CONFIG_CLONE_BACKWARDS) + + int sys_clone(unsigned long int clone_flags, + unsigned long int 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..296f3197ee31 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/jmp_buf-macros.h @@ -0,0 +1,6 @@ +#define JMP_BUF_SIZE (32 + 1 + 64 / (8 * sizeof (unsigned long int))) * sizeof (unsigned long int) +#define SIGJMP_BUF_SIZE (32 + 1 + 64 / (8 * sizeof (unsigned long int))) * sizeof (unsigned long int) +#define JMP_BUF_ALIGN __alignof__ (unsigned long int) +#define SIGJMP_BUF_ALIGN __alignof__ (unsigned long int) +#define MASK_WAS_SAVED_OFFSET (32 * sizeof (unsigned long int)) +#define SAVED_MASK_OFFSET (33 * sizeof (unsigned long int)) 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..4f23a34489eb --- /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) 2009-2020 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 + <https://www.gnu.org/licenses/>. */ + +/* The minimum supported kernel version for ARC is 5.1 (64-bit time, offsets), + although the asm-generic ABI is from 3.9 (when Linux port was merged). */ + +#include_next <kernel-features.h> + +#undef __ASSUME_CLONE_DEFAULT +#define __ASSUME_CLONE_BACKWARDS 1 diff --git a/sysdeps/unix/sysv/linux/arc/kernel_stat.h b/sysdeps/unix/sysv/linux/arc/kernel_stat.h new file mode 100644 index 000000000000..8fdd86b9e843 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/kernel_stat.h @@ -0,0 +1,26 @@ +/* Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <bits/wordsize.h> + +/* Needed to elide the itemized copy code in common xstatconv.c. */ +#define STAT_IS_KERNEL_STAT 1 + +/* Nice side-effect of 64-bit time_t switch is these are same. */ +#define XSTAT_IS_XSTAT64 1 + +#define STATFS_IS_STATFS64 0 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..19aa078dd45e --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/mmap_internal.h @@ -0,0 +1,27 @@ +/* mmap - map files or devices into memory. Linux/ARC version. + Copyright (C) 2017-2020 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef MMAP_ARC_INTERNAL_H +#define MMAP_ARC_INTERNAL_H + +/* 8K is default but determine the shift dynamically with getpagesize. */ +#define MMAP2_PAGE_UNIT -1 + +#include_next <mmap_internal.h> + +#endif 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..1cc893170070 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/pt-vfork.S @@ -0,0 +1 @@ +/* Not needed. */ diff --git a/sysdeps/unix/sysv/linux/arc/sigaction.c b/sysdeps/unix/sysv/linux/arc/sigaction.c new file mode 100644 index 000000000000..2613eb883fb1 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/sigaction.c @@ -0,0 +1,31 @@ +/* ARC specific sigaction. + Copyright (C) 1997-2020 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 + <https://www.gnu.org/licenses/>. */ + +#define SA_RESTORER 0x04000000 + +extern void __default_rt_sa_restorer (void); + +#define SET_SA_RESTORER(kact, act) \ + ({ \ + (kact)->sa_restorer = __default_rt_sa_restorer; \ + (kact)->sa_flags |= SA_RESTORER; \ + }) + +#define RESET_SA_RESTORER(act, kact) + +#include <sysdeps/unix/sysv/linux/sigaction.c> diff --git a/sysdeps/unix/sysv/linux/arc/sigrestorer.S b/sysdeps/unix/sysv/linux/arc/sigrestorer.S new file mode 100644 index 000000000000..cc3c1a0d09ff --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/sigrestorer.S @@ -0,0 +1,29 @@ +/* Default sigreturn stub for ARC Linux. + Copyright (C) 2005-2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <sys/syscall.h> +#include <sysdep.h> +#include <tcb-offsets.h> + +/* Note the NOP has to be outside body. */ + nop +ENTRY (__default_rt_sa_restorer) + mov r8, __NR_rt_sigreturn + ARC_TRAP_INSN + j_s [blink] +PSEUDO_END_NOERRNO (__default_rt_sa_restorer) diff --git a/sysdeps/unix/sysv/linux/arc/syscall.S b/sysdeps/unix/sysv/linux/arc/syscall.S new file mode 100644 index 000000000000..ff17e71575b1 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/syscall.S @@ -0,0 +1,33 @@ +/* syscall - indirect system call. + Copyright (C) 2017-2020 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 + <https://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 + mov_s r4, r5 + mov_s r5, r6 + + ARC_TRAP_INSN + brhi r0, -1024, .Lcall_syscall_err + j [blink] +PSEUDO_END (syscall) diff --git a/sysdeps/unix/sysv/linux/arc/syscalls.list b/sysdeps/unix/sysv/linux/arc/syscalls.list new file mode 100644 index 000000000000..d0ef5977ee06 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/syscalls.list @@ -0,0 +1,3 @@ +# File name Caller Syscall name Args Strong name Weak names + +cacheflush - cacheflush i:pii _flush_cache cacheflush diff --git a/sysdeps/unix/sysv/linux/arc/sysctl.mk b/sysdeps/unix/sysv/linux/arc/sysctl.mk new file mode 100644 index 000000000000..05a4e2f8c99b --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/sysctl.mk @@ -0,0 +1 @@ +# ARC doesn't support sysctl. diff --git a/sysdeps/unix/sysv/linux/arc/sysdep.c b/sysdeps/unix/sysv/linux/arc/sysdep.c new file mode 100644 index 000000000000..42c8575ba461 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/sysdep.c @@ -0,0 +1,33 @@ +/* ARC wrapper for setting errno. + Copyright (C) 1997-2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <errno.h> + +/* All syscall handlers land 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..565eca5e3e55 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/sysdep.h @@ -0,0 +1,219 @@ +/* Assembler macros for ARC. + Copyright (C) 2000-2020 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _LINUX_ARC_SYSDEP_H +#define _LINUX_ARC_SYSDEP_H 1 + +#include <sysdeps/arc/sysdep.h> +#include <sysdeps/unix/sysv/linux/generic/sysdep.h> + +/* ARC's version of asm-generic syscall ABI does provide fstat64 and fstatat64 + but it not compatible with glibc 64-bit time_t based stat64. So undef them + to allow generic code to pick up statx syscall based wrappers which do the + explict interworking. + Similarly futex32 exists and works but we'd rather use futex64. But lll code + using futex expects __NR_futex hence the forced redefine + */ +#undef __NR_fstat64 +#undef __NR_fstatat64 +#undef __NR_futex +#define __NR_futex __NR_futex_time64 + +/* 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, -4096, .Lcall_syscall_err ASM_LINE_SEP + +# define ret j_s [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. Since r0 is both + syscall return reg and function return reg, no work needed. */ +# 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 \ + push_s blink 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 \ + pop_s blink ASM_LINE_SEP \ + cfi_adjust_cfa_offset (-4) ASM_LINE_SEP \ + cfi_restore (blink) ASM_LINE_SEP \ + j_s [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 + +# if IS_IN (libc) +extern int __syscall_error (int); +hidden_proto (__syscall_error) +# endif + +# define ARC_TRAP_INSN "trap_s 0 \n\t" + +# undef INTERNAL_SYSCALL_NCS +# define INTERNAL_SYSCALL_NCS(number, 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 (number, args) \ + \ + __asm__ volatile ( \ + ARC_TRAP_INSN \ + : "+r" (__ret) \ + : "r"(_sys_num) ASM_ARGS_##nr_args \ + : "memory"); \ + \ + __ret; }) + +# undef INTERNAL_SYSCALL +# define INTERNAL_SYSCALL(name, nr, args...) \ + INTERNAL_SYSCALL_NCS(SYS_ify(name), nr, args) + +/* 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; + +/* 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..ac1cce5258e0 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/vfork.S @@ -0,0 +1,42 @@ +/* vfork for ARC Linux. + Copyright (C) 2005-2020 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 + <https://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) -- 2.20.1 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-snps-arc
