[OpenRISC] [PATCH v4 08/13] or1k: Linux Syscall Interface

Adhemerval Zanella
2022-01-03T18:21:58Z

LGTM, thanks.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

On 29/12/2021 01:42, Stafford Horne via Libc-alpha wrote:
> ---
> sysdeps/unix/sysv/linux/or1k/arch-syscall.h | 325 +++++++++++++++++++
> sysdeps/unix/sysv/linux/or1k/clone.c | 61 ++++
> sysdeps/unix/sysv/linux/or1k/mmap_internal.h | 28 ++
> sysdeps/unix/sysv/linux/or1k/or1k_clone.S | 89 +++++
> sysdeps/unix/sysv/linux/or1k/sysdep.c | 34 ++
> sysdeps/unix/sysv/linux/or1k/sysdep.h | 201 ++++++++++++
> 6 files changed, 738 insertions(+)
> create mode 100644 sysdeps/unix/sysv/linux/or1k/arch-syscall.h
> create mode 100644 sysdeps/unix/sysv/linux/or1k/clone.c
> create mode 100644 sysdeps/unix/sysv/linux/or1k/mmap_internal.h
> create mode 100644 sysdeps/unix/sysv/linux/or1k/or1k_clone.S
> create mode 100644 sysdeps/unix/sysv/linux/or1k/sysdep.c
> create mode 100644 sysdeps/unix/sysv/linux/or1k/sysdep.h
>
> diff --git a/sysdeps/unix/sysv/linux/or1k/arch-syscall.h b/sysdeps/unix/sysv/linux/or1k/arch-syscall.h
> new file mode 100644
> index 0000000000..c6c3556137
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/or1k/arch-syscall.h
> @@ -0,0 +1,325 @@
> +/* 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_bind 200
> +#define __NR_bpf 280
> +#define __NR_brk 214
> +#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_close_range 436
> +#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_epoll_pwait2 441
> +#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_faccessat2 439
> +#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_landlock_add_rule 445
> +#define __NR_landlock_create_ruleset 444
> +#define __NR_landlock_restrict_self 446
> +#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_mount_setattr 442
> +#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_openat2 437
> +#define __NR_or1k_atomic 244
> +#define __NR_perf_event_open 241
> +#define __NR_personality 92
> +#define __NR_pidfd_getfd 438
> +#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_madvise 440
> +#define __NR_process_mrelease 448
> +#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_quotactl_fd 443
> +#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_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/or1k/clone.c b/sysdeps/unix/sysv/linux/or1k/clone.c
> new file mode 100644
> index 0000000000..531fd17e29
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/or1k/clone.c
> @@ -0,0 +1,61 @@
> +/* OpenRISC helper for the clone syscall.
> + Copyright (C) 2021 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 <stdarg.h>
> +#include <sysdep.h>
> +
> +extern int __or1k_clone (int (*fn)(void *), void *child_stack,
> + int flags, void *arg, pid_t *ptid,
> + void *tls, pid_t *ctid);
> +
> +
> +/* The OpenRISC ABI uses the stack for varargs like those using in clone
> + but the linux syscall ABI uses registers.
> + This function moves from varargs to regs. */
> +int
> +__clone (int (*fn)(void *), void *child_stack,
> + int flags, void *arg, ...
> + /* pid_t *ptid, struct user_desc *tls, pid_t *ctid */ )
> +{
> + void *ptid;
> + void *tls;
> + void *ctid;
> + va_list ap;
> + int err;
> +
> + va_start (ap, arg);
> + ptid = va_arg (ap, void *);
> + tls = va_arg (ap, void *);
> + ctid = va_arg (ap, void *);
> + va_end (ap);
> +
> + /* Sanity check the arguments */
> + err = -EINVAL;
> + if (!fn)
> + goto syscall_error;
> + if (!child_stack)
> + goto syscall_error;
> +
> + return __or1k_clone (fn, child_stack, flags, arg, ptid, tls, ctid);
> +
> +syscall_error:
> + __set_errno (-err);
> + return -1;
> +}
> +libc_hidden_def (__clone)
> +weak_alias (__clone, clone)
> diff --git a/sysdeps/unix/sysv/linux/or1k/mmap_internal.h b/sysdeps/unix/sysv/linux/or1k/mmap_internal.h
> new file mode 100644
> index 0000000000..817b841e5b
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/or1k/mmap_internal.h
> @@ -0,0 +1,28 @@
> +/* Common mmap definition for Linux implementation. OpenRISC version.
> + Copyright (C) 2021 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_OR1K_INTERNAL_LINUX_H
> +#define MMAP_OR1K_INTERNAL_LINUX_H
> +
> +/* OpenRISC Linux sets the page shift to 13 and mmap2 expects
> + offsets to be provided in 8K pages. */
> +#define MMAP2_PAGE_UNIT 8192ULL
> +
> +#include_next <mmap_internal.h>
> +
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/or1k/or1k_clone.S b/sysdeps/unix/sysv/linux/or1k/or1k_clone.S
> new file mode 100644
> index 0000000000..1f1db1acb2
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/or1k/or1k_clone.S
> @@ -0,0 +1,89 @@
> +/* clone helper __or1k_clone for OpenRISC.
> + Copyright (C) 2021 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, write to the Free
> + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
> + 02111-1307 USA. */
> +
> +#include <sysdep.h>
> +#include <tls.h>
> +#define __ASSEMBLY__
> +#include <linux/sched.h>
> +
> + .text
> +ENTRY (__or1k_clone)
> +
> + /* To handle GCC varargs we need to use our __clone wrapper to pop
> + everything from the stack for us.
> + Now everything is placed in the registers which saves us a lot
> + of trouble.
> +
> + The userland implementation is:
> +
> + int clone (int (*fn)(void *), void *child_stack,
> + int flags, void *arg, pid_t *ptid,
> + struct user_desc *tls, pid_t *ctid);
> + The kernel entry is:
> +
> + int clone (long flags, void *child_stack, int *parent_tid,
> + int *child_tid, struct void *tls)
> +
> + NB: tls isn't really an argument, it is read from r7 directly. */
> +
> + /* First, align the stack to 4 bytes. */
> + l.xori r11, r0, -4
> + l.and r4, r4, r11
> +
> + /* Put 'fn', 'arg' and 'flags' on the child stack. */
> + l.addi r4, r4, -12
> + l.sw 8(r4), r3
> + l.sw 4(r4), r6
> + l.sw 0(r4), r5
> +
> + l.ori r3, r5, 0
> + /* The child_stack is already in r4. */
> + l.ori r5, r7, 0
> + l.lwz r6, 0(r1)
> + l.ori r7, r8, 0
> +
> + DO_CALL (clone)
> +
> + l.sfgeui r11, 0xf001
> + l.bf L(error)
> + l.nop
> +
> + /* If we are not the child, return the pid. */
> + l.sfeqi r11, 0
> + l.bf L(thread_start)
> + l.nop
> +
> + l.jr r9
> + l.nop
> +
> +L(thread_start):
> + /* Load function from stack. */
> + l.lwz r11, 8(r1)
> + l.jalr r11
> + l.lwz r3, 4(r1)
> +
> + /* Exit the child thread. */
> + l.ori r3, r11, 0
> + DO_CALL (exit)
> +
> +L(error):
> + l.j SYSCALL_ERROR_NAME
> + l.ori r3, r11, 0
> +
> +END (__or1k_clone)
> diff --git a/sysdeps/unix/sysv/linux/or1k/sysdep.c b/sysdeps/unix/sysv/linux/or1k/sysdep.c
> new file mode 100644
> index 0000000000..1130cba687
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/or1k/sysdep.c
> @@ -0,0 +1,34 @@
> +/* OpenRISC wrapper for setting errno.
> + Copyright (C) 2021 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>
> +
> +long int __syscall_error (long int err);
> +hidden_proto (__syscall_error)
> +
> +/* This routine is jumped to by all the syscall handlers, to stash
> + an error number into errno. */
> +long int
> +__syscall_error (long int err)
> +{
> + __set_errno (- err);
> + return -1;
> +}
> +hidden_def (__syscall_error)
> diff --git a/sysdeps/unix/sysv/linux/or1k/sysdep.h b/sysdeps/unix/sysv/linux/or1k/sysdep.h
> new file mode 100644
> index 0000000000..5dd6da48a1
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/or1k/sysdep.h
> @@ -0,0 +1,201 @@
> +/* Assembler and syscall macros. OpenRISC version.
> + Copyright (C) 2021 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_OR1K_SYSDEP_H
> +#define _LINUX_OR1K_SYSDEP_H 1
> +
> +#include <sysdeps/or1k/sysdep.h>
> +#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
> +#include <tls.h>
> +
> +/* "workarounds" for generic code needing to handle 64-bit time_t. */
> +
> +#undef __NR_clock_getres
> +#undef __NR_futex
> +#undef __NR_ppoll
> +#undef __NR_pselect6
> +#undef __NR_recvmmsg
> +#undef __NR_rt_sigtimedwait
> +#undef __NR_semtimedop
> +#undef __NR_utimensat
> +
> +/* Fix sysdeps/unix/sysv/linux/clock_getcpuclockid.c. */
> +#define __NR_clock_getres __NR_clock_getres_time64
> +/* Fix sysdeps/nptl/lowlevellock-futex.h. */
> +#define __NR_futex __NR_futex_time64
> +/* Fix sysdeps/unix/sysv/linux/pause.c. */
> +#define __NR_ppoll __NR_ppoll_time64
> +/* Fix sysdeps/unix/sysv/linux/select.c. */
> +#define __NR_pselect6 __NR_pselect6_time64
> +/* Fix sysdeps/unix/sysv/linux/recvmmsg.c. */
> +#define __NR_recvmmsg __NR_recvmmsg_time64
> +/* Fix sysdeps/unix/sysv/linux/sigtimedwait.c. */
> +#define __NR_rt_sigtimedwait __NR_rt_sigtimedwait_time64
> +/* Fix sysdeps/unix/sysv/linux/semtimedop.c. */
> +#define __NR_semtimedop __NR_semtimedop_time64
> +/* Hack sysdeps/unix/sysv/linux/generic/utimes.c. */
> +#define __NR_utimensat __NR_utimensat_time64
> +
> +#undef SYS_ify
> +#define SYS_ify(syscall_name) (__NR_##syscall_name)
> +
> +/* Linux uses a negative return value to indicate syscall errors,
> + unlike most Unices, which use the condition codes' carry flag.
> +
> + Since version 2.1 the return value of a system call might be
> + negative even if the call succeeded. E.g., the lseek system call
> + might return a large offset. Therefore we must not anymore test
> + for < 0, but test for a real error by making sure the value in R0
> + is a real error number. Linus said he will make sure the no syscall
> + returns a value in -1 .. -4095 as a valid result so we can safely
> + test with -4095. */
> +
> +#ifdef __ASSEMBLER__
> +
> +/* Macros used in syscall-template.S */
> +#define ret l.jr r9; l.nop
> +#define ret_NOERRNO l.jr r9; l.nop
> +
> +#undef DO_CALL
> +#define DO_CALL(syscall_name) \
> + l.addi r11, r0, SYS_ify (syscall_name); \
> + l.sys 1; \
> + l.nop
> +
> +#undef PSEUDO
> +#define PSEUDO(name, syscall_name, args) \
> + ENTRY (name); \
> + DO_CALL(syscall_name); \
> + /* if -4096 < ret < 0 holds, it's an error */ \
> + l.sfgeui r11, 0xf001; \
> + l.bf L(pseudo_end); \
> + l.nop
> +
> +#undef PSEUDO_NOERRNO
> +#define PSEUDO_NOERRNO(name, syscall_name, args) \
> + ENTRY (name); \
> + DO_CALL(syscall_name)
> +
> +#undef PSEUDO_END
> +#define PSEUDO_END(name) \
> +L(pseudo_end): \
> + l.j SYSCALL_ERROR_NAME; \
> + l.ori r3,r11,0; \
> + END (name)
> +
> +#undef PSEUDO_END_NOERRNO
> +#define PSEUDO_END_NOERRNO(name) \
> + END (name)
> +
> +#ifndef PIC
> +/* For static code, on error jump to __syscall_error directly. */
> +# define SYSCALL_ERROR_NAME __syscall_error
> +#elif !IS_IN (libc)
> +/* Use the internal name for libc shared objects. */
> +# define SYSCALL_ERROR_NAME __GI___syscall_error
> +#else
> +/* Otherwise, on error do a full PLT jump. */
> +# define SYSCALL_ERROR_NAME plt(__syscall_error)
> +#endif
> +
> +#else /* not __ASSEMBLER__ */
> +
> +#include <errno.h>
> +
> +extern long int __syscall_error (long int neg_errno);
> +
> +/* Pointer mangling is not yet supported for or1k. */
> +#define PTR_MANGLE(var) (void) (var)
> +#define PTR_DEMANGLE(var) (void) (var)
> +
> +#undef INTERNAL_SYSCALL
> +#define INTERNAL_SYSCALL(name, nr, args...) \
> + INTERNAL_SYSCALL_NCS (SYS_ify (name), nr, args)
> +
> +/* The _NCS variant allows non-constant syscall numbers. */
> +#undef INTERNAL_SYSCALL_NCS
> +#define INTERNAL_SYSCALL_NCS(number, nr, args...) \
> + ({ unsigned long int __sys_result; \
> + { \
> + long int _sc_ret = (long int) number; \
> + LOAD_ARGS_##nr (args) \
> + register long int __sc_ret __asm__ ("r11") = _sc_ret; \
> + __asm__ __volatile__ ("l.sys 1\n\t" \
> + " l.nop\n\t" \
> + : "+r" (__sc_ret) \
> + : ASM_ARGS_##nr \
> + : ASM_CLOBBERS_##nr \
> + "r12", "r13", "r15", "r17", "r19", \
> + "r21", "r23", "r25", "r27", "r29", \
> + "r31", "memory"); \
> + __sys_result = __sc_ret; \
> + } \
> + (long int) __sys_result; })
> +
> +/* From here on we have nested macros that generate code for
> + setting up syscall arguments. */
> +
> +#define LOAD_ARGS_0()
> +
> +#define ASM_ARGS_0
> +#define ASM_CLOBBERS_0 "r3", ASM_CLOBBERS_1
> +
> +#define LOAD_ARGS_1(a) \
> + long int _a = (long int)(a); \
> + register long int __a __asm__ ("r3") = _a;
> +#define ASM_ARGS_1 "r" (__a)
> +#define ASM_CLOBBERS_1 "r4", ASM_CLOBBERS_2
> +
> +#define LOAD_ARGS_2(a, b) \
> + long int _b = (long int)(b); \
> + LOAD_ARGS_1 (a) \
> + register long int __b __asm__ ("r4") = _b;
> +#define ASM_ARGS_2 ASM_ARGS_1, "r" (__b)
> +#define ASM_CLOBBERS_2 "r5", ASM_CLOBBERS_3
> +
> +#define LOAD_ARGS_3(a, b, c) \
> + long int _c = (long int)(c); \
> + LOAD_ARGS_2 (a, b) \
> + register long int __c __asm__ ("r5") = _c;
> +#define ASM_ARGS_3 ASM_ARGS_2, "r" (__c)
> +#define ASM_CLOBBERS_3 "r6", ASM_CLOBBERS_4
> +
> +#define LOAD_ARGS_4(a, b, c, d) \
> + LOAD_ARGS_3 (a, b, c) \
> + long int _d = (long int)(d); \
> + register long int __d __asm__ ("r6") = _d;
> +#define ASM_ARGS_4 ASM_ARGS_3, "r" (__d)
> +#define ASM_CLOBBERS_4 "r7", ASM_CLOBBERS_5
> +
> +#define LOAD_ARGS_5(a, b, c, d, e) \
> + long int _e = (long int)(e); \
> + LOAD_ARGS_4 (a, b, c, d) \
> + register long int __e __asm__ ("r7") = _e;
> +#define ASM_ARGS_5 ASM_ARGS_4, "r" (__e)
> +#define ASM_CLOBBERS_5 "r8", ASM_CLOBBERS_6
> +
> +#define LOAD_ARGS_6(a, b, c, d, e, f) \
> + long int _f = (long int)(f); \
> + LOAD_ARGS_5 (a, b, c, d, e) \
> + register long int __f __asm__ ("r8") = _f;
> +#define ASM_ARGS_6 ASM_ARGS_5, "r" (__f)
> +#define ASM_CLOBBERS_6
> +
> +#endif /* not __ASSEMBLER__ */
> +
> +#endif /* linux/or1k/sysdep.h */