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LoongArch: Linux Syscall Interface

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caiyinyu 2022-07-19 09:20:50 +08:00 committed by Adhemerval Zanella
parent 3275882261
commit 45955fe618
8 changed files with 947 additions and 0 deletions
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2
sysdeps/loongarch/abort-instr.h Normal file
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/* An instruction which should crash any program is a breakpoint. */
#define ABORT_INSTRUCTION asm ("break 0")

42
sysdeps/loongarch/hp-timing.h Normal file
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/* High precision, low overhead timing functions.
Copyright (C) 2022 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 _HP_TIMING_H
#define _HP_TIMING_H 1
/* We always assume having the timestamp register. */
#define HP_TIMING_AVAIL (1)
#define HP_SMALL_TIMING_AVAIL (1)
/* We indeed have inlined functions. */
#define HP_TIMING_INLINE (1)
/* We use 64bit values for the times. */
typedef unsigned long long int hp_timing_t;
/* Read the stable counter. */
#define HP_TIMING_NOW(Var) \
({ \
unsigned long long int _count; \
asm volatile ("rdtime.d\t%0,$r0" : "=r" (_count)); \
(Var) = _count; \
})
#include <hp-timing-common.h>
#endif /* hp-timing.h */

301
sysdeps/unix/sysv/linux/loongarch/arch-syscall.h Normal file
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/* 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_getres 114
#define __NR_clock_gettime 113
#define __NR_clock_nanosleep 115
#define __NR_clock_settime 112
#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 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_fcntl 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_fstatfs 44
#define __NR_fsync 82
#define __NR_ftruncate 46
#define __NR_futex 98
#define __NR_futex_waitv 449
#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_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_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_lookup_dcookie 18
#define __NR_lremovexattr 15
#define __NR_lseek 62
#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_mmap 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_timedsend 182
#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_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_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_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_recvmsg 212
#define __NR_remap_file_pages 234
#define __NR_removexattr 14
#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_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_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_sendfile 71
#define __NR_sendmmsg 269
#define __NR_sendmsg 211
#define __NR_sendto 206
#define __NR_set_mempolicy 237
#define __NR_set_mempolicy_home_node 450
#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_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_statfs 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_settime 110
#define __NR_timerfd_create 85
#define __NR_timerfd_gettime 87
#define __NR_timerfd_settime 86
#define __NR_times 153
#define __NR_tkill 130
#define __NR_truncate 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_vhangup 58
#define __NR_vmsplice 75
#define __NR_wait4 260
#define __NR_waitid 95
#define __NR_write 64
#define __NR_writev 66

96
sysdeps/unix/sysv/linux/loongarch/clone.S Normal file
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/* The clone syscall wrapper.
Copyright (C) 2022 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/>. */
/* 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 <sys/asm.h>
#include <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
#include <tls.h>
#include "tcb-offsets.h"
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
void *parent_tidptr, void *tls, void *child_tidptr) */
ENTRY (__clone)
/* Align stack to 16. */
BSTRINS a1, zero, 3, 0
/* Sanity check arguments. */
beqz a0, L (invalid) /* No NULL function pointers. */
beqz a1, L (invalid) /* No NULL stack pointers. */
ADDI a1, a1, -16 /* Reserve argument save space. */
REG_S a0, a1, 0 /* Save function pointer. */
REG_S a3, a1, SZREG /* Save argument pointer. */
/* The syscall expects the args to be in different slots. */
or a0, a2, zero
or a2, a4, zero
or a3, a6, zero
or a4, a5, zero
/* Do the system call. */
LI a7,__NR_clone
syscall 0
blt a0, zero ,L (error)
beqz a0,L (thread_start)
/* Successful return from the parent. */
ret
L (invalid):
LI a0, -EINVAL
/* Something bad happened -- no child created. */
L (error):
b __syscall_error
END (__clone)
/* 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. */
ENTRY (__thread_start)
L (thread_start):
/* Terminate call stack by noting ra is undefined. Use a dummy
.cfi_label to force starting the FDE. */
.cfi_label .Ldummy
cfi_undefined (1)
/* Restore the arg for user's function. */
REG_L a1, sp, 0 /* Function pointer. */
REG_L a0, sp, SZREG /* Argument pointer. */
/* Call the user's function. */
jirl ra, a1, 0
/* Call exit with the function's return value. */
LI a7, __NR_exit
syscall 0
END (__thread_start)
libc_hidden_def (__clone)
weak_alias (__clone, clone)

83
sysdeps/unix/sysv/linux/loongarch/clone3.S Normal file
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/* The clone3 syscall wrapper.
Copyright (C) 2022 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/>. */
/* clone3() is even more special than fork() as it mucks with stacks
and invokes a function in the right context after its all over. */
#include <sys/asm.h>
#include <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
#include <tls.h>
#include "tcb-offsets.h"
/* int clone3(struct clone_args *cl_args, size_t size,
int (*func)(void *arg), void *arg); */
ENTRY (__clone3)
/* Sanity check arguments. */
beqz a0, L (invalid) /* No NULL cl_args pointer. */
beqz a2, L (invalid) /* No NULL function pointer. */
/* Do the system call. */
LI a7, __NR_clone3
syscall 0
blt a0, zero ,L (error)
beqz a0, L (thread_start3)
/* Successful return from the parent. */
ret
L (invalid):
LI a0, -EINVAL
/* Something bad happened -- no child created. */
L (error):
b __syscall_error
END (__clone3)
/* 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. */
ENTRY (__thread_start3)
L (thread_start3):
/* Terminate call stack by noting ra is undefined. Use a dummy
.cfi_label to force starting the FDE. */
.cfi_label .Ldummy
cfi_undefined (1)
/* Align stack to 16. */
BSTRINS sp, zero, 3, 0
/* Set up arguments for the function call. */
move a0, a3 /* Argument. */
jirl ra, a2, 0 /* Call function. */
/* Call exit with the function's return value. */
LI a7, __NR_exit
syscall 0
END (__thread_start3)
libc_hidden_def (__clone3)
weak_alias (__clone3, clone3)

53
sysdeps/unix/sysv/linux/loongarch/sysdep.S Normal file
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/* syscall error handlers
Copyright (C) 2022 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>
#if IS_IN (libc)
# define errno __libc_errno
#endif
ENTRY (__syscall_error)
/* Fall through to __syscall_set_errno */
END (__syscall_error)
/* Non-standard calling convention: argument in a0, return address in t0,
and clobber only t1.
*/
ENTRY (__syscall_set_errno)
/* We got here because a0 < 0, but only codes in the range [-4095, -1]
represent errors. Otherwise, just return the result normally.
*/
li.d t1, -4096
bgeu t1, a0, L (out)
sub.w a0, zero, a0
#if RTLD_PRIVATE_ERRNO
la t1, rtld_errno
#elif defined(__PIC__)
la.tls.ie t1, errno
add.d t1, tp, t1
#else
la.tls.le t1, errno
add.d t1, tp, t1
#endif
st.w a0, t1, 0
li.d a0, -1
L (out):
ret
END (__syscall_set_errno)

320
sysdeps/unix/sysv/linux/loongarch/sysdep.h Normal file
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/* Assembly macros for LoongArch.
Copyright (C) 2022 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_LOONGARCH_SYSDEP_H
#define _LINUX_LOONGARCH_SYSDEP_H 1
#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
#include <tls.h>
#ifdef __ASSEMBLER__
#include <sys/asm.h>
#define ret jirl zero, ra, 0
#define L(label) .L##label
/* Performs a system call, handling errors by setting errno. Linux indicates
errors by setting a0 to a value between -1 and -4095. */
#undef PSEUDO
#define PSEUDO(name, syscall_name, args) \
ENTRY (name); \
li.d a7, SYS_ify (syscall_name); \
syscall 0; \
li.d a7, -4096; \
bltu a7, a0, .Lsyscall_error##name;
#undef PSEUDO_END
#define PSEUDO_END(sym) \
SYSCALL_ERROR_HANDLER (sym); \
ret; \
END (sym);
#if !IS_IN(libc)
#if RTLD_PRIVATE_ERRNO
#define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error##name : la t0, rtld_errno; \
sub.w a0, zero, a0; \
st.w a0, t0, 0; \
li.d a0, -1;
#else
#define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error##name : la.tls.ie t0, errno; \
add.d t0, tp, t0; \
sub.w a0, zero, a0; \
st.w a0, t0, 0; \
li.d a0, -1;
#endif
#else
#define SYSCALL_ERROR_HANDLER(name) .Lsyscall_error##name : b __syscall_error;
#endif
/* Performs a system call, not setting errno. */
#undef PSEUDO_NEORRNO
#define PSEUDO_NOERRNO(name, syscall_name, args) \
ENTRY (name); \
li.d a7, SYS_ify (syscall_name); \
syscall 0;
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name) END (name);
#undef ret_NOERRNO
#define ret_NOERRNO ret
/* Perfroms a system call, returning the error code. */
#undef PSEUDO_ERRVAL
#define PSEUDO_ERRVAL(name, syscall_name, args) \
PSEUDO_NOERRNO (name, syscall_name, args); \
slli.d a0, a0, 32; \
srai.d a0, a0, 32; /* sign_ext */ \
sub.d a0, zero, a0;
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(name) END (name);
#undef ret_ERRVAL
#define ret_ERRVAL ret
#endif /* __ASSEMBLER__ */
/* In order to get __set_errno() definition in INLINE_SYSCALL. */
#ifndef __ASSEMBLER__
#include <errno.h>
#endif
#include <sysdeps/unix/sysdep.h>
#undef SYS_ify
#define SYS_ify(syscall_name) __NR_##syscall_name
#ifndef __ASSEMBLER__
#define VDSO_NAME "LINUX_2.6"
#define VDSO_HASH 61765110
/* List of system calls which are supported as vsyscalls. */
#define HAVE_CLOCK_GETRES64_VSYSCALL "__vdso_clock_getres"
#define HAVE_CLOCK_GETTIME64_VSYSCALL "__vdso_clock_gettime"
#define HAVE_GETCPU_VSYSCALL "__vdso_getcpu"
#define HAVE_CLONE3_WRAPPER 1
#define INTERNAL_SYSCALL(name, nr, args...) \
internal_syscall##nr (SYS_ify (name), args)
#define INTERNAL_SYSCALL_NCS(number, nr, args...) \
internal_syscall##nr (number, args)
#define internal_syscall0(number, dummy...) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0"); \
__asm__ volatile ("syscall 0\n\t" \
: "=r"(__a0) \
: "r"(__a7) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall1(number, arg0) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall2(number, arg0, arg1) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall3(number, arg0, arg1, arg2) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall4(number, arg0, arg1, arg2, arg3) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall5(number, arg0, arg1, arg2, arg3, arg4) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
register long int __a4 asm ("$a4") = _arg4; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), \
"r"(__a3), "r"(__a4) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall6(number, arg0, arg1, arg2, arg3, arg4, arg5) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
long int _arg5 = (long int) (arg5); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
register long int __a4 asm ("$a4") = _arg4; \
register long int __a5 asm ("$a5") = _arg5; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
"r"(__a4), "r"(__a5) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall7(number, arg0, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
long int _arg5 = (long int) (arg5); \
long int _arg6 = (long int) (arg6); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
register long int __a4 asm ("$a4") = _arg4; \
register long int __a5 asm ("$a5") = _arg5; \
register long int __a6 asm ("$a6") = _arg6; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
"r"(__a4), "r"(__a5), "r"(__a6) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define __SYSCALL_CLOBBERS \
"$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "memory"
extern long int __syscall_error (long int neg_errno);
#endif /* ! __ASSEMBLER__ */
/* Pointer mangling is not supported. */
#define PTR_MANGLE(var) (void) (var)
#define PTR_DEMANGLE(var) (void) (var)
#endif /* linux/loongarch/sysdep.h */

50
sysdeps/unix/sysv/linux/loongarch/vfork.S Normal file
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@ -0,0 +1,50 @@
/* vfork for Linux.
Copyright (C) 2022 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>
#define _ERRNO_H 1
#include <bits/errno.h>
/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process. */
ENTRY (__vfork)
li.d a0, 0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */
add.d a1, zero, sp
/* Do the system call. */
li.d a7, __NR_clone
syscall 0
blt a0, zero ,L (error)
ret
L (error):
b __syscall_error
END (__vfork)
libc_hidden_def (__vfork)
weak_alias (__vfork, vfork)
strong_alias (__vfork, __libc_vfork)