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glibc/0007-Sw64-Linux-Syscall-Interface.patch
swcompiler 55189b18b5 Sw64: Add Sw64 ISA support 
(cherry picked from commit 7c7ae25b26c3c937686ae3f686a768532b14ec36)
2025-01-04 15:06:39 +08:00

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From a48f11d0af793110f1a5289967bcb45a188058c3 Mon Sep 17 00:00:00 2001
From: swcompiler <lc@wxiat.com>
Date: Fri, 29 Nov 2024 14:04:40 +0800
Subject: [PATCH 07/23] Sw64: Linux Syscall Interface
---
sysdeps/unix/sw_64/Makefile | 4 +
sysdeps/unix/sw_64/pipe.S | 31 ++
sysdeps/unix/sw_64/rt-sysdep.S | 1 +
sysdeps/unix/sw_64/sysdep.S | 65 ++++
sysdeps/unix/sysv/linux/sw_64/arch-syscall.h | 376 +++++++++++++++++++
sysdeps/unix/sysv/linux/sw_64/clone.S | 117 ++++++
sysdeps/unix/sysv/linux/sw_64/syscall.S | 70 ++++
sysdeps/unix/sysv/linux/sw_64/sysdep.h | 355 +++++++++++++++++
sysdeps/unix/sysv/linux/sw_64/vfork.S | 41 ++
9 files changed, 1060 insertions(+)
create mode 100644 sysdeps/unix/sw_64/Makefile
create mode 100644 sysdeps/unix/sw_64/pipe.S
create mode 100644 sysdeps/unix/sw_64/rt-sysdep.S
create mode 100644 sysdeps/unix/sw_64/sysdep.S
create mode 100644 sysdeps/unix/sysv/linux/sw_64/arch-syscall.h
create mode 100644 sysdeps/unix/sysv/linux/sw_64/clone.S
create mode 100644 sysdeps/unix/sysv/linux/sw_64/syscall.S
create mode 100644 sysdeps/unix/sysv/linux/sw_64/sysdep.h
create mode 100644 sysdeps/unix/sysv/linux/sw_64/vfork.S
diff --git a/sysdeps/unix/sw_64/Makefile b/sysdeps/unix/sw_64/Makefile
new file mode 100644
index 00000000..0660847f
--- /dev/null
+++ b/sysdeps/unix/sw_64/Makefile
@@ -0,0 +1,4 @@
+ifeq ($(subdir),rt)
+librt-sysdep_routines += rt-sysdep
+librt-shared-only-routines += rt-sysdep
+endif
diff --git a/sysdeps/unix/sw_64/pipe.S b/sysdeps/unix/sw_64/pipe.S
new file mode 100644
index 00000000..d851fe17
--- /dev/null
+++ b/sysdeps/unix/sw_64/pipe.S
@@ -0,0 +1,31 @@
+/* Copyright (C) 1993-2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by David Mosberger (davidm@cs.arizona.edu).
+
+ 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/>. */
+
+/* __pipe is a special syscall since it returns two values. */
+
+#include <sysdep.h>
+
+PSEUDO (__pipe, pipe, 0)
+ stw r0, 0(a0)
+ stw r1, 4(a0)
+ mov zero, v0
+ ret
+PSEUDO_END(__pipe)
+
+libc_hidden_def (__pipe)
+weak_alias (__pipe, pipe)
diff --git a/sysdeps/unix/sw_64/rt-sysdep.S b/sysdeps/unix/sw_64/rt-sysdep.S
new file mode 100644
index 00000000..f966bf1e
--- /dev/null
+++ b/sysdeps/unix/sw_64/rt-sysdep.S
@@ -0,0 +1 @@
+#include <sysdep.S>
diff --git a/sysdeps/unix/sw_64/sysdep.S b/sysdeps/unix/sw_64/sysdep.S
new file mode 100644
index 00000000..306184c3
--- /dev/null
+++ b/sysdeps/unix/sw_64/sysdep.S
@@ -0,0 +1,65 @@
+/* Copyright (C) 1993-2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Brendan Kehoe (brendan@zen.org).
+
+ 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 <features.h>
+
+#if defined(PIC)
+ /* Put this at the end of libc's text segment so that all of
+ the direct branches from the syscalls are forward, and
+ thus predicted not taken. */
+ .section .text.last, "ax", @progbits
+#else
+ .text
+#endif
+
+#if IS_IN (libc)
+# define SYSCALL_ERROR_ERRNO __libc_errno
+#else
+# define SYSCALL_ERROR_ERRNO errno
+#endif
+
+ .align 4
+ .globl __syscall_error
+ .ent __syscall_error
+__syscall_error:
+ /* When building a shared library, we branch here without having
+ loaded the GP. Nor, since it was a direct branch, have we
+ loaded PV with our address.
+
+ When building a static library, we tail call here from another
+ object file, possibly with a different GP, and must return with
+ the GP of our caller in place so that linker relaxation works.
+
+ Both issues are solved by computing the GP into T1 instead of
+ clobbering the traditional GP register. */
+ .prologue 0
+ mov v0, t0
+ br t1, 1f
+1: ldih t1, 0(t1) !gpdisp!1
+ sys_call HMC_rdunique
+
+ ldi t1, 0(t1) !gpdisp!1
+ ldl t1, SYSCALL_ERROR_ERRNO(t1) !gottprel
+ addl v0, t1, t1
+ ldi v0, -1
+
+ stw t0, 0(t1)
+ ret
+
+ .end __syscall_error
diff --git a/sysdeps/unix/sysv/linux/sw_64/arch-syscall.h b/sysdeps/unix/sysv/linux/sw_64/arch-syscall.h
new file mode 100644
index 00000000..62597a14
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sw_64/arch-syscall.h
@@ -0,0 +1,376 @@
+/* AUTOGENERATED by update-syscall-lists.py. */
+#define __NR_accept 99
+#define __NR_accept4 502
+#define __NR_access 33
+#define __NR_acct 51
+#define __NR_add_key 439
+#define __NR_adjtimex 366
+#define __NR_afs_syscall 338
+#define __NR_bdflush 300
+#define __NR_bind 104
+#define __NR_bpf 170
+#define __NR_brk 17
+#define __NR_cachestat 190
+#define __NR_capget 368
+#define __NR_capset 369
+#define __NR_chdir 12
+#define __NR_chmod 15
+#define __NR_chown 16
+#define __NR_chroot 61
+#define __NR_clock_adjtime 499
+#define __NR_clock_getres 421
+#define __NR_clock_gettime 420
+#define __NR_clock_nanosleep 422
+#define __NR_clock_settime 419
+#define __NR_clone 312
+#define __NR_clone3 282
+#define __NR_close 6
+#define __NR_close_range 283
+#define __NR_connect 98
+#define __NR_copy_file_range 515
+#define __NR_create_module 306
+#define __NR_delete_module 308
+#define __NR_dipc 373
+#define __NR_dup 41
+#define __NR_dup2 90
+#define __NR_dup3 487
+#define __NR_epoll_create 407
+#define __NR_epoll_create1 486
+#define __NR_epoll_ctl 408
+#define __NR_epoll_pwait 474
+#define __NR_epoll_pwait2 180
+#define __NR_epoll_wait 409
+#define __NR_eventfd 478
+#define __NR_eventfd2 485
+#define __NR_execve 59
+#define __NR_execveat 513
+#define __NR_exit 1
+#define __NR_exit_group 405
+#define __NR_faccessat 462
+#define __NR_faccessat2 286
+#define __NR_fadvise64 413
+#define __NR_fallocate 480
+#define __NR_fanotify_init 494
+#define __NR_fanotify_mark 495
+#define __NR_fchdir 13
+#define __NR_fchmod 124
+#define __NR_fchmodat 461
+#define __NR_fchmodat2 191
+#define __NR_fchown 123
+#define __NR_fchownat 453
+#define __NR_fcntl 92
+#define __NR_fdatasync 447
+#define __NR_fgetxattr 387
+#define __NR_finit_module 507
+#define __NR_flistxattr 390
+#define __NR_flock 131
+#define __NR_fork 2
+#define __NR_fremovexattr 393
+#define __NR_fsconfig 278
+#define __NR_fsetxattr 384
+#define __NR_fsmount 279
+#define __NR_fsopen 277
+#define __NR_fspick 280
+#define __NR_fstat 91
+#define __NR_fstat64 427
+#define __NR_fstatat64 455
+#define __NR_fstatfs 329
+#define __NR_fstatfs64 230
+#define __NR_fsync 95
+#define __NR_ftruncate 130
+#define __NR_futex 394
+#define __NR_futex_waitv 188
+#define __NR_futimesat 454
+#define __NR_get_kernel_syms 309
+#define __NR_get_mempolicy 430
+#define __NR_get_robust_list 467
+#define __NR_getcpu 473
+#define __NR_getcwd 367
+#define __NR_getdents 305
+#define __NR_getdents64 377
+#define __NR_getegid 179
+#define __NR_geteuid 177
+#define __NR_getgid 178
+#define __NR_getgroups 79
+#define __NR_gethostname 87
+#define __NR_getitimer 361
+#define __NR_getpeername 141
+#define __NR_getpgid 233
+#define __NR_getpgrp 63
+#define __NR_getpid 174
+#define __NR_getppid 175
+#define __NR_getpriority 298
+#define __NR_getrandom 511
+#define __NR_getresgid 372
+#define __NR_getresuid 344
+#define __NR_getrlimit 144
+#define __NR_getrusage 364
+#define __NR_getsid 234
+#define __NR_getsockname 150
+#define __NR_getsockopt 118
+#define __NR_getsysinfo 256
+#define __NR_gettid 378
+#define __NR_gettimeofday 359
+#define __NR_getuid 176
+#define __NR_getxattr 385
+#define __NR_getxgid 47
+#define __NR_getxpid 20
+#define __NR_getxuid 24
+#define __NR_init_module 307
+#define __NR_inotify_add_watch 445
+#define __NR_inotify_init 444
+#define __NR_inotify_init1 489
+#define __NR_inotify_rm_watch 446
+#define __NR_io_cancel 402
+#define __NR_io_destroy 399
+#define __NR_io_getevents 400
+#define __NR_io_pgetevents 403
+#define __NR_io_setup 398
+#define __NR_io_submit 401
+#define __NR_io_uring_enter 273
+#define __NR_io_uring_register 274
+#define __NR_io_uring_setup 272
+#define __NR_ioctl 54
+#define __NR_ioprio_get 443
+#define __NR_ioprio_set 442
+#define __NR_kcmp 506
+#define __NR_kexec_load 448
+#define __NR_keyctl 441
+#define __NR_kill 37
+#define __NR_landlock_add_rule 184
+#define __NR_landlock_create_ruleset 183
+#define __NR_landlock_restrict_self 185
+#define __NR_lchown 208
+#define __NR_lgetxattr 386
+#define __NR_link 9
+#define __NR_linkat 458
+#define __NR_listen 106
+#define __NR_listxattr 388
+#define __NR_llistxattr 389
+#define __NR_lookup_dcookie 406
+#define __NR_lremovexattr 392
+#define __NR_lseek 19
+#define __NR_lsetxattr 383
+#define __NR_lstat 68
+#define __NR_lstat64 426
+#define __NR_madvise 75
+#define __NR_mbind 429
+#define __NR_membarrier 172
+#define __NR_memfd_create 512
+#define __NR_migrate_pages 449
+#define __NR_mincore 375
+#define __NR_mkdir 136
+#define __NR_mkdirat 451
+#define __NR_mknod 14
+#define __NR_mknodat 452
+#define __NR_mlock 314
+#define __NR_mlock2 173
+#define __NR_mlockall 316
+#define __NR_mmap 71
+#define __NR_mount 302
+#define __NR_mount_setattr 181
+#define __NR_move_mount 276
+#define __NR_move_pages 472
+#define __NR_mprotect 74
+#define __NR_mq_getsetattr 437
+#define __NR_mq_notify 436
+#define __NR_mq_open 432
+#define __NR_mq_timedreceive 435
+#define __NR_mq_timedsend 434
+#define __NR_mq_unlink 433
+#define __NR_mremap 341
+#define __NR_msgctl 200
+#define __NR_msgget 201
+#define __NR_msgrcv 202
+#define __NR_msgsnd 203
+#define __NR_msync 217
+#define __NR_munlock 315
+#define __NR_munlockall 317
+#define __NR_munmap 73
+#define __NR_name_to_handle_at 497
+#define __NR_nanosleep 340
+#define __NR_nfsservctl 342
+#define __NR_odd_getpriority 100
+#define __NR_odd_sigprocmask 48
+#define __NR_oldumount 321
+#define __NR_open 45
+#define __NR_open_by_handle_at 498
+#define __NR_open_tree 275
+#define __NR_openat 450
+#define __NR_openat2 284
+#define __NR_pciconfig_iobase 376
+#define __NR_pciconfig_read 345
+#define __NR_pciconfig_write 346
+#define __NR_perf_event_open 493
+#define __NR_personality 324
+#define __NR_pidfd_getfd 285
+#define __NR_pidfd_open 281
+#define __NR_pidfd_send_signal 271
+#define __NR_pipe 42
+#define __NR_pipe2 488
+#define __NR_pivot_root 374
+#define __NR_pkey_alloc 289
+#define __NR_pkey_free 290
+#define __NR_pkey_mprotect 288
+#define __NR_poll 94
+#define __NR_ppoll 464
+#define __NR_prctl 348
+#define __NR_pread64 349
+#define __NR_preadv 490
+#define __NR_preadv2 516
+#define __NR_prlimit64 496
+#define __NR_process_madvise 287
+#define __NR_process_mrelease 187
+#define __NR_process_vm_readv 504
+#define __NR_process_vm_writev 505
+#define __NR_pselect6 463
+#define __NR_ptrace 26
+#define __NR_pwrite64 350
+#define __NR_pwritev 491
+#define __NR_pwritev2 517
+#define __NR_query_module 347
+#define __NR_quotactl 148
+#define __NR_quotactl_fd 182
+#define __NR_read 3
+#define __NR_readahead 379
+#define __NR_readlink 58
+#define __NR_readlinkat 460
+#define __NR_readv 120
+#define __NR_reboot 311
+#define __NR_recv 102
+#define __NR_recvfrom 125
+#define __NR_recvmmsg 479
+#define __NR_recvmsg 113
+#define __NR_remap_file_pages 410
+#define __NR_removexattr 391
+#define __NR_rename 128
+#define __NR_renameat 457
+#define __NR_renameat2 510
+#define __NR_request_key 440
+#define __NR_restart_syscall 412
+#define __NR_rmdir 137
+#define __NR_rseq 404
+#define __NR_rt_sigaction 352
+#define __NR_rt_sigpending 354
+#define __NR_rt_sigprocmask 353
+#define __NR_rt_sigqueueinfo 356
+#define __NR_rt_sigreturn 351
+#define __NR_rt_sigsuspend 357
+#define __NR_rt_sigtimedwait 355
+#define __NR_rt_tgsigqueueinfo 492
+#define __NR_sched_get_priority_max 335
+#define __NR_sched_get_priority_min 336
+#define __NR_sched_getaffinity 396
+#define __NR_sched_getattr 509
+#define __NR_sched_getparam 331
+#define __NR_sched_getscheduler 333
+#define __NR_sched_rr_get_interval 337
+#define __NR_sched_setaffinity 395
+#define __NR_sched_setattr 508
+#define __NR_sched_setparam 330
+#define __NR_sched_setscheduler 332
+#define __NR_sched_yield 334
+#define __NR_seccomp 514
+#define __NR_select 358
+#define __NR_semctl 204
+#define __NR_semget 205
+#define __NR_semop 206
+#define __NR_semtimedop 423
+#define __NR_send 101
+#define __NR_sendfile 370
+#define __NR_sendmmsg 503
+#define __NR_sendmsg 114
+#define __NR_sendto 133
+#define __NR_set_mempolicy 431
+#define __NR_set_mempolicy_home_node 189
+#define __NR_set_robust_list 466
+#define __NR_set_tid_address 411
+#define __NR_setdomainname 166
+#define __NR_setfsgid 326
+#define __NR_setfsuid 325
+#define __NR_setgid 132
+#define __NR_setgroups 80
+#define __NR_sethostname 88
+#define __NR_setitimer 362
+#define __NR_setns 501
+#define __NR_setpgid 39
+#define __NR_setpgrp 82
+#define __NR_setpriority 96
+#define __NR_setregid 127
+#define __NR_setresgid 371
+#define __NR_setresuid 343
+#define __NR_setreuid 126
+#define __NR_setrlimit 145
+#define __NR_setsid 147
+#define __NR_setsockopt 105
+#define __NR_setsysinfo 257
+#define __NR_settimeofday 360
+#define __NR_setuid 23
+#define __NR_setxattr 382
+#define __NR_shmat 209
+#define __NR_shmctl 210
+#define __NR_shmdt 211
+#define __NR_shmget 212
+#define __NR_shutdown 134
+#define __NR_sigaction 156
+#define __NR_sigaltstack 235
+#define __NR_signalfd 476
+#define __NR_signalfd4 484
+#define __NR_sigpending 52
+#define __NR_sigprocmask 299
+#define __NR_sigreturn 103
+#define __NR_sigsuspend 111
+#define __NR_socket 97
+#define __NR_socketcall 119
+#define __NR_socketpair 135
+#define __NR_splice 468
+#define __NR_stat 67
+#define __NR_stat64 425
+#define __NR_statfs 328
+#define __NR_statfs64 229
+#define __NR_statx 518
+#define __NR_swapoff 304
+#define __NR_swapon 322
+#define __NR_symlink 57
+#define __NR_symlinkat 459
+#define __NR_sync 36
+#define __NR_sync_file_range 469
+#define __NR_syncfs 500
+#define __NR_sysfs 254
+#define __NR_sysinfo 318
+#define __NR_syslog 310
+#define __NR_tee 470
+#define __NR_tgkill 424
+#define __NR_timer_create 414
+#define __NR_timer_delete 418
+#define __NR_timer_getoverrun 417
+#define __NR_timer_gettime 416
+#define __NR_timer_settime 415
+#define __NR_timerfd 477
+#define __NR_timerfd_create 481
+#define __NR_timerfd_gettime 483
+#define __NR_timerfd_settime 482
+#define __NR_times 323
+#define __NR_tkill 381
+#define __NR_truncate 129
+#define __NR_tuxcall 397
+#define __NR_umask 60
+#define __NR_umount 22
+#define __NR_umount2 22
+#define __NR_uname 339
+#define __NR_unlink 10
+#define __NR_unlinkat 456
+#define __NR_unshare 465
+#define __NR_uselib 313
+#define __NR_userfaultfd 171
+#define __NR_ustat 327
+#define __NR_utimensat 475
+#define __NR_utimes 363
+#define __NR_vfork 66
+#define __NR_vhangup 76
+#define __NR_vmsplice 471
+#define __NR_vserver 428
+#define __NR_wait4 365
+#define __NR_waitid 438
+#define __NR_write 4
+#define __NR_writev 121
diff --git a/sysdeps/unix/sysv/linux/sw_64/clone.S b/sysdeps/unix/sysv/linux/sw_64/clone.S
new file mode 100644
index 00000000..6f08adae
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sw_64/clone.S
@@ -0,0 +1,117 @@
+/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Richard Henderson <rth@tamu.edu>, 1996.
+
+ 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/>. */
+
+/* clone() is even more special than fork() as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags,
+ void *arg, pid_t *ptid, void *tls, pid_t *ctid);
+
+ Note that everything past ARG is technically optional, based
+ on FLAGS, and that CTID is arg 7, and thus is on the stack.
+ However, since a load from top-of-stack better be legal always,
+ we don't bother checking FLAGS. */
+
+ .text
+ .align 4
+ .globl __clone
+ .ent __clone
+ .usepv __clone, USEPV_PROF
+
+ cfi_startproc
+__clone:
+#ifdef PROF
+ .set noat
+ ldgp gp,0(pv)
+ ldi AT, _mcount
+ call AT, (AT), _mcount
+ .set at
+#endif
+
+ /* Sanity check arguments. */
+ ldi v0, EINVAL
+ beq a0, SYSCALL_ERROR_LABEL /* no NULL function pointers */
+ bic a1, 0xf,a1 /*Align sp. By zyl */
+ beq a1, SYSCALL_ERROR_LABEL /* no NULL stack pointers */
+
+ /* Save the fn ptr and arg on the new stack. */
+ subl a1, 32, a1
+ stl a0, 0(a1)
+ stl a3, 8(a1)
+ stl a2, 16(a1)
+
+ /* The syscall is of the form clone(flags, usp, ptid, ctid, tls).
+ Shift the flags, ptid, ctid, tls arguments into place; the
+ child_stack argument is already correct. */
+ mov a2, a0
+ mov a4, a2
+ ldl a3, 0(sp)
+ mov a5, a4
+
+ /* Do the system call. */
+ ldi v0, __NR_clone
+ sys_call HMC_callsys
+
+ bne a3, SYSCALL_ERROR_LABEL
+ beq v0, thread_start
+
+ /* Successful return from the parent. */
+ ret
+
+PSEUDO_END(__clone)
+ cfi_endproc
+
+/* Load up the arguments to the function. Put this block of code in
+ its own function so that we can terminate the stack trace with our
+ debug info. */
+
+ .align 4
+ .ent thread_start
+ cfi_startproc
+thread_start:
+ mov 0, fp
+ cfi_def_cfa_register(fp)
+ cfi_undefined(ra)
+
+ /* Load up the arguments. */
+ ldl pv, 0(sp)
+ ldl a0, 8(sp)
+ addl sp, 32, sp
+
+ /* Call the user's function. */
+ call ra, (pv)
+ ldgp gp, 0(ra)
+
+ mov v0, a0
+ ldi v0, __NR_exit
+ sys_call HMC_callsys
+
+ /* Die horribly. */
+ .align 4
+ halt
+
+ .align 4
+ cfi_endproc
+ .end thread_start
+
+libc_hidden_def (__clone)
+weak_alias (__clone, clone)
diff --git a/sysdeps/unix/sysv/linux/sw_64/syscall.S b/sysdeps/unix/sysv/linux/sw_64/syscall.S
new file mode 100644
index 00000000..286b9925
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sw_64/syscall.S
@@ -0,0 +1,70 @@
+/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by David Mosberger <davidm@azstarnet.com>, 1996.
+
+ 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>
+
+/*
+ * This is for COMPATIBILITY with Linux/x86 only. Linux/Sw_64 system
+ * calls return an error indication in a3. This allows arbitrary 64bit
+ * values to be returned in v0 (because negative values are not
+ * mistaken as error numbers). However, C allows only one value to
+ * be returned, so the interface below foflds the error indication passed in
+ * a3 back into v0: it sets v0 to -errno if an error occurs. Thus,
+ * no negative 64bit numbers can be returned. To avoid this problem,
+ * use assembly stubs wherever possible/convenient.
+ *
+ * Usage:
+ *
+ * long syscall(syscall_number, arg1, arg2, arg3, arg4, arg5, arg6)
+ *
+ * syscall_number = the index of the system call we're invoking
+ * arg1-arg6 = up to 6 integer arguments to the system call
+ *
+ * We need to do some arg shifting: the kernel expects the
+ * syscall number in v0 and the first six args in a0-a5.
+ *
+ */
+
+
+LEAF(__syscall, 0)
+#ifdef PROF
+ ldgp gp, 0(pv)
+ .set noat
+ ldi AT, _mcount
+ call AT, (AT), _mcount
+ .set at
+ .prologue 1
+#else
+ .prologue 0
+#endif
+
+ mov a0, v0 /* Syscall number -> v0 */
+ mov a1, a0 /* arg1-arg5 -> a0-a4 */
+ mov a2, a1
+ mov a3, a2
+ mov a4, a3
+ mov a5, a4
+ ldl a5,0(sp) /* arg6 -> a5 */
+
+ sys_call HMC_callsys /* Invoke system call */
+ bne a3, SYSCALL_ERROR_LABEL
+ ret
+
+PSEUDO_END(__syscall)
+
+weak_alias (__syscall, syscall)
diff --git a/sysdeps/unix/sysv/linux/sw_64/sysdep.h b/sysdeps/unix/sysv/linux/sw_64/sysdep.h
new file mode 100644
index 00000000..f047c609
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sw_64/sysdep.h
@@ -0,0 +1,355 @@
+/* Copyright (C) 1992-2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
+
+ 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_SW_64_SYSDEP_H
+#define _LINUX_SW_64_SYSDEP_H 1
+
+/* There is some commonality. */
+#include <sysdeps/unix/sysv/linux/sysdep.h>
+#include <sysdeps/unix/sysdep.h>
+#include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */
+
+#include <tls.h>
+
+/* For Linux we can use the system call table in the header file
+ /usr/include/asm/unistd.h
+ of the kernel. But these symbols do not follow the SYS_* syntax
+ so we have to redefine the `SYS_ify' macro here. */
+#undef SYS_ify
+#define SYS_ify(syscall_name) __NR_##syscall_name
+
+#define SINGLE_THREAD_BY_GLOBAL 1
+
+#ifdef __ASSEMBLER__
+# include <asm/hmcall.h>
+# include <sw_64/regdef.h>
+
+# define __LABEL(x) x##:
+
+# define LEAF(name, framesize) \
+ .globl name; \
+ .align 4; \
+ .ent name, 0; \
+ __LABEL (name).frame sp, framesize, ra
+
+# define ENTRY(name) \
+ .globl name; \
+ .align 4; \
+ .ent name, 0; \
+ __LABEL (name).frame sp, 0, ra
+
+/* Mark the end of function SYM. */
+# undef END
+# define END(sym) .end sym
+
+# ifdef PROF
+# define PSEUDO_PROF \
+ .set noat; \
+ ldi AT, _mcount; \
+ call AT, (AT), _mcount; \
+ .set at
+# else
+# define PSEUDO_PROF
+# endif
+
+# ifdef PROF
+# define PSEUDO_PROLOGUE \
+ .frame sp, 0, ra; \
+ ldgp gp, 0(pv); \
+ PSEUDO_PROF; \
+ .prologue 1
+# elif defined PIC
+# define PSEUDO_PROLOGUE \
+ .frame sp, 0, ra; \
+ .prologue 0
+# else
+# define PSEUDO_PROLOGUE \
+ .frame sp, 0, ra; \
+ ldgp gp, 0(pv); \
+ .prologue 1
+# endif /* PROF */
+
+# ifdef PROF
+# define USEPV_PROF std
+# else
+# define USEPV_PROF no
+# endif
+
+# undef SYSCALL_ERROR_LABEL
+# if RTLD_PRIVATE_ERRNO
+# define SYSCALL_ERROR_LABEL $syscall_error
+# define SYSCALL_ERROR_HANDLER \
+ $syscall_error: \
+ stw v0, rtld_errno (gp) !gprel; \
+ ldi v0, -1; \
+ ret
+# define SYSCALL_ERROR_FALLTHRU
+# elif defined(PIC)
+# define SYSCALL_ERROR_LABEL __syscall_error !samegp
+# define SYSCALL_ERROR_HANDLER
+# define SYSCALL_ERROR_FALLTHRU br SYSCALL_ERROR_LABEL
+# else
+# define SYSCALL_ERROR_LABEL $syscall_error
+# define SYSCALL_ERROR_HANDLER \
+ $syscall_error: \
+ jmp $31, __syscall_error
+# define SYSCALL_ERROR_FALLTHRU
+# endif /* RTLD_PRIVATE_ERRNO */
+
+/* Overridden by specific syscalls. */
+# undef PSEUDO_PREPARE_ARGS
+# define PSEUDO_PREPARE_ARGS /* Nothing. */
+
+# define PSEUDO(name, syscall_name, args) \
+ .globl name; \
+ .align 4; \
+ .ent name, 0; \
+ __LABEL (name) \
+ PSEUDO_PROLOGUE; \
+ PSEUDO_PREPARE_ARGS \
+ ldi v0, SYS_ify (syscall_name); \
+ sys_call HMC_callsys; \
+ bne a3, SYSCALL_ERROR_LABEL
+
+# undef PSEUDO_END
+# define PSEUDO_END(sym) \
+ SYSCALL_ERROR_HANDLER; \
+ END (sym)
+
+# define PSEUDO_NOERRNO(name, syscall_name, args) \
+ .globl name; \
+ .align 4; \
+ .ent name, 0; \
+ __LABEL (name) \
+ PSEUDO_PROLOGUE; \
+ PSEUDO_PREPARE_ARGS \
+ ldi v0, SYS_ify (syscall_name); \
+ sys_call HMC_callsys;
+
+# undef PSEUDO_END_NOERRNO
+# define PSEUDO_END_NOERRNO(sym) END (sym)
+
+# define ret_NOERRNO ret
+
+# define PSEUDO_ERRVAL(name, syscall_name, args) \
+ .globl name; \
+ .align 4; \
+ .ent name, 0; \
+ __LABEL (name) \
+ PSEUDO_PROLOGUE; \
+ PSEUDO_PREPARE_ARGS \
+ ldi v0, SYS_ify (syscall_name); \
+ sys_call HMC_callsys;
+
+# undef PSEUDO_END_ERRVAL
+# define PSEUDO_END_ERRVAL(sym) END (sym)
+
+# define ret_ERRVAL ret
+
+# define r0 v0
+# define r1 a4
+
+# define MOVE(x, y) mov x, y
+
+#else /* !ASSEMBLER */
+
+#define HAVE_CLOCK_GETTIME_VSYSCALL "__vdso_clock_gettime"
+#define HAVE_CLOCK_GETTIME64_VSYSCALL "__vdso_clock_gettime64"
+
+#define INTERNAL_SYSCALL(name, nr, args...) \
+ internal_syscall##nr(__NR_##name, args)
+
+# define INTERNAL_SYSCALL_NCS(name, nr, args...) \
+ internal_syscall##nr (name, args)
+
+/* The normal Sw_64 calling convention sign-extends 32-bit quantties
+ no matter what the "real" sign of the 32-bit type. We want to
+ preserve that when filling in values for the kernel. */
+# define syscall_promote(arg) \
+ (sizeof (arg) == 4 ? (long int) (int) (long int) (arg) : (long int) (arg))
+
+# define internal_syscall_clobbers \
+ "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$22", "$23", "$24", \
+ "$25", "$27", "$28", "memory"
+
+/* It is moderately important optimization-wise to limit the lifetime
+ of the hard-register variables as much as possible. Thus we copy
+ in/out as close to the asm as possible. */
+
+# define internal_syscall0(name, args...) \
+ ({ \
+ register long int _sc_19 __asm__("$19"); \
+ register long int _sc_0 = name; \
+ __asm__ __volatile__("sys_call 0x83 # %0 %1 <= %2" \
+ : "+v"(_sc_0), "=r"(_sc_19) \
+ : \
+ : internal_syscall_clobbers, "$16", "$17", "$18", \
+ "$20", "$21"); \
+ _sc_19 != 0 ? -_sc_0 : _sc_0; \
+ })
+
+# define internal_syscall1(name, arg1) \
+ ({ \
+ register long int _tmp_16 = syscall_promote (arg1); \
+ register long int _sc_0 = name; \
+ register long int _sc_16 __asm__("$16") = _tmp_16; \
+ register long int _sc_19 __asm__("$19"); \
+ __asm__ __volatile__("sys_call 0x83 # %0 %1 <= %2 %3" \
+ : "+v"(_sc_0), "=r"(_sc_19), "+r"(_sc_16) \
+ : \
+ : internal_syscall_clobbers, "$17", "$18", "$20", \
+ "$21"); \
+ _sc_19 != 0 ? -_sc_0 : _sc_0; \
+ })
+
+# define internal_syscall2(name, arg1, arg2) \
+ ({ \
+ register long int _tmp_16 = syscall_promote (arg1); \
+ register long int _tmp_17 = syscall_promote (arg2); \
+ register long int _sc_0 = name; \
+ register long int _sc_16 __asm__("$16") = _tmp_16; \
+ register long int _sc_17 __asm__("$17") = _tmp_17; \
+ register long int _sc_19 __asm__("$19"); \
+ __asm__ __volatile__("sys_call 0x83 # %0 %1 <= %2 %3 %4" \
+ : "+v"(_sc_0), "=r"(_sc_19), "+r"(_sc_16), \
+ "+r"(_sc_17) \
+ : \
+ : internal_syscall_clobbers, "$18", "$20", "$21"); \
+ _sc_19 != 0 ? -_sc_0 : _sc_0; \
+ })
+
+# define internal_syscall3(name, arg1, arg2, arg3) \
+ ({ \
+ register long int _tmp_16 = syscall_promote (arg1); \
+ register long int _tmp_17 = syscall_promote (arg2); \
+ register long int _tmp_18 = syscall_promote (arg3); \
+ register long int _sc_0 = name; \
+ register long int _sc_16 __asm__("$16") = _tmp_16; \
+ register long int _sc_17 __asm__("$17") = _tmp_17; \
+ register long int _sc_18 __asm__("$18") = _tmp_18; \
+ register long int _sc_19 __asm__("$19"); \
+ __asm__ __volatile__("sys_call 0x83 # %0 %1 <= %2 %3 %4 %5" \
+ : "+v"(_sc_0), "=r"(_sc_19), "+r"(_sc_16), \
+ "+r"(_sc_17), "+r"(_sc_18) \
+ : \
+ : internal_syscall_clobbers, "$20", "$21"); \
+ _sc_19 != 0 ? -_sc_0 : _sc_0; \
+ })
+
+# define internal_syscall4(name, arg1, arg2, arg3, arg4) \
+ ({ \
+ register long int _tmp_16 = syscall_promote (arg1); \
+ register long int _tmp_17 = syscall_promote (arg2); \
+ register long int _tmp_18 = syscall_promote (arg3); \
+ register long int _tmp_19 = syscall_promote (arg4); \
+ register long int _sc_0 = name; \
+ register long int _sc_16 __asm__("$16") = _tmp_16; \
+ register long int _sc_17 __asm__("$17") = _tmp_17; \
+ register long int _sc_18 __asm__("$18") = _tmp_18; \
+ register long int _sc_19 __asm__("$19") = _tmp_19; \
+ __asm__ __volatile__("sys_call 0x83 # %0 %1 <= %2 %3 %4 %5 %6" \
+ : "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \
+ "+r"(_sc_17), "+r"(_sc_18) \
+ : \
+ : internal_syscall_clobbers, "$20", "$21"); \
+ _sc_19 != 0 ? -_sc_0 : _sc_0; \
+ })
+
+# define internal_syscall5(name, arg1, arg2, arg3, arg4, arg5) \
+ ({ \
+ register long int _tmp_16 = syscall_promote (arg1); \
+ register long int _tmp_17 = syscall_promote (arg2); \
+ register long int _tmp_18 = syscall_promote (arg3); \
+ register long int _tmp_19 = syscall_promote (arg4); \
+ register long int _tmp_20 = syscall_promote (arg5); \
+ register long int _sc_0 = name; \
+ register long int _sc_16 __asm__("$16") = _tmp_16; \
+ register long int _sc_17 __asm__("$17") = _tmp_17; \
+ register long int _sc_18 __asm__("$18") = _tmp_18; \
+ register long int _sc_19 __asm__("$19") = _tmp_19; \
+ register long int _sc_20 __asm__("$20") = _tmp_20; \
+ __asm__ __volatile__("sys_call 0x83 # %0 %1 <= %2 %3 %4 %5 %6 %7" \
+ : "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \
+ "+r"(_sc_17), "+r"(_sc_18), "+r"(_sc_20) \
+ : \
+ : internal_syscall_clobbers, "$21"); \
+ _sc_19 != 0 ? -_sc_0 : _sc_0; \
+ })
+
+# define internal_syscall6(name, arg1, arg2, arg3, arg4, arg5, arg6) \
+ ({ \
+ register long int _tmp_16 = syscall_promote (arg1); \
+ register long int _tmp_17 = syscall_promote (arg2); \
+ register long int _tmp_18 = syscall_promote (arg3); \
+ register long int _tmp_19 = syscall_promote (arg4); \
+ register long int _tmp_20 = syscall_promote (arg5); \
+ register long int _tmp_21 = syscall_promote (arg6); \
+ register long int _sc_0 = name; \
+ register long int _sc_16 __asm__("$16") = _tmp_16; \
+ register long int _sc_17 __asm__("$17") = _tmp_17; \
+ register long int _sc_18 __asm__("$18") = _tmp_18; \
+ register long int _sc_19 __asm__("$19") = _tmp_19; \
+ register long int _sc_20 __asm__("$20") = _tmp_20; \
+ register long int _sc_21 __asm__("$21") = _tmp_21; \
+ __asm__ __volatile__("sys_call 0x83 # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \
+ : "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \
+ "+r"(_sc_17), "+r"(_sc_18), "+r"(_sc_20), \
+ "+r"(_sc_21) \
+ : \
+ : internal_syscall_clobbers); \
+ _sc_19 != 0 ? -_sc_0 : _sc_0; \
+ })
+#endif /* ASSEMBLER */
+
+/* Pointer mangling support. Note that tls access is slow enough that
+ we don't deoptimize things by placing the pointer check value there. */
+
+#ifdef __ASSEMBLER__
+# if IS_IN(rtld)
+# define PTR_MANGLE(dst, src, tmp) \
+ ldih tmp, __pointer_chk_guard_local ($29) !gprelhigh; \
+ ldl tmp, __pointer_chk_guard_local (tmp) !gprellow; \
+ xor src, tmp, dst
+# define PTR_MANGLE2(dst, src, tmp) xor src, tmp, dst
+# elif defined SHARED
+# define PTR_MANGLE(dst, src, tmp) \
+ ldl tmp, __pointer_chk_guard; \
+ xor src, tmp, dst
+# else
+# define PTR_MANGLE(dst, src, tmp) \
+ ldl tmp, __pointer_chk_guard_local; \
+ xor src, tmp, dst
+# endif
+# define PTR_MANGLE2(dst, src, tmp) xor src, tmp, dst
+# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE (dst, dst, tmp)
+# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2 (dst, dst, tmp)
+#else
+# include <stdint.h>
+# if (IS_IN(rtld) || (!defined SHARED && (IS_IN(libc) || IS_IN(libpthread))))
+extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
+# define PTR_MANGLE(var) \
+ (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
+# else
+extern uintptr_t __pointer_chk_guard attribute_relro;
+# define PTR_MANGLE(var) \
+ (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
+# endif
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+#endif /* ASSEMBLER */
+
+#endif /* _LINUX_SW_64_SYSDEP_H */
diff --git a/sysdeps/unix/sysv/linux/sw_64/vfork.S b/sysdeps/unix/sysv/linux/sw_64/vfork.S
new file mode 100644
index 00000000..a79eb93a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sw_64/vfork.S
@@ -0,0 +1,41 @@
+/* Copyright (C) 2004-2023 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 <tcb-offsets.h>
+
+ENTRY(__libc_vfork)
+ PSEUDO_PROLOGUE
+
+ /* Load the thread pointer value in A1 across the vfork. */
+ sys_call 0x9e
+ mov v0, a1
+
+ ldi v0, SYS_ify(vfork)
+ sys_call HMC_callsys
+
+ /* Normal error check and return. */
+ bne a3, SYSCALL_ERROR_LABEL
+ ret
+
+PSEUDO_END (__libc_vfork)
+
+#if IS_IN (libc)
+weak_alias (__libc_vfork, vfork)
+strong_alias (__libc_vfork, __vfork)
+libc_hidden_def (__vfork)
+#endif
--
2.25.1
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