mirror of
https://sourceware.org/git/glibc.git
synced 2025-01-12 20:20:18 +00:00
or1k: Linux Syscall Interface
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Stafford Horne
parent
9a47b9660b
commit
1871c95f2b
325
sysdeps/unix/sysv/linux/or1k/arch-syscall.h
Normal file
325
sysdeps/unix/sysv/linux/or1k/arch-syscall.h
Normal file
@ -0,0 +1,325 @@
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/* AUTOGENERATED by update-syscall-lists.py. */
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#define __NR_accept 202
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#define __NR_accept4 242
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#define __NR_acct 89
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#define __NR_add_key 217
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#define __NR_adjtimex 171
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#define __NR_bind 200
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#define __NR_bpf 280
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#define __NR_brk 214
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#define __NR_capget 90
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#define __NR_capset 91
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#define __NR_chdir 49
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#define __NR_chroot 51
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#define __NR_clock_adjtime 266
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#define __NR_clock_adjtime64 405
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#define __NR_clock_getres 114
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#define __NR_clock_getres_time64 406
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#define __NR_clock_gettime 113
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#define __NR_clock_gettime64 403
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#define __NR_clock_nanosleep 115
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#define __NR_clock_nanosleep_time64 407
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#define __NR_clock_settime 112
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#define __NR_clock_settime64 404
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#define __NR_clone 220
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#define __NR_clone3 435
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#define __NR_close 57
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#define __NR_close_range 436
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#define __NR_connect 203
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||||
#define __NR_copy_file_range 285
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||||
#define __NR_delete_module 106
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#define __NR_dup 23
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#define __NR_dup3 24
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#define __NR_epoll_create1 20
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#define __NR_epoll_ctl 21
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#define __NR_epoll_pwait 22
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#define __NR_epoll_pwait2 441
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#define __NR_eventfd2 19
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#define __NR_execve 221
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#define __NR_execveat 281
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#define __NR_exit 93
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#define __NR_exit_group 94
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#define __NR_faccessat 48
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#define __NR_faccessat2 439
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#define __NR_fadvise64_64 223
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#define __NR_fallocate 47
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#define __NR_fanotify_init 262
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#define __NR_fanotify_mark 263
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#define __NR_fchdir 50
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#define __NR_fchmod 52
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#define __NR_fchmodat 53
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#define __NR_fchown 55
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#define __NR_fchownat 54
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#define __NR_fcntl64 25
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#define __NR_fdatasync 83
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#define __NR_fgetxattr 10
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#define __NR_finit_module 273
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#define __NR_flistxattr 13
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#define __NR_flock 32
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#define __NR_fremovexattr 16
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#define __NR_fsconfig 431
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#define __NR_fsetxattr 7
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#define __NR_fsmount 432
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#define __NR_fsopen 430
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#define __NR_fspick 433
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#define __NR_fstat64 80
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#define __NR_fstatat64 79
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#define __NR_fstatfs64 44
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#define __NR_fsync 82
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#define __NR_ftruncate64 46
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#define __NR_futex 98
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#define __NR_futex_time64 422
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#define __NR_get_mempolicy 236
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#define __NR_get_robust_list 100
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#define __NR_getcpu 168
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#define __NR_getcwd 17
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#define __NR_getdents64 61
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#define __NR_getegid 177
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#define __NR_geteuid 175
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#define __NR_getgid 176
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#define __NR_getgroups 158
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#define __NR_getitimer 102
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#define __NR_getpeername 205
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#define __NR_getpgid 155
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#define __NR_getpid 172
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#define __NR_getppid 173
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#define __NR_getpriority 141
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#define __NR_getrandom 278
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#define __NR_getresgid 150
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#define __NR_getresuid 148
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#define __NR_getrlimit 163
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#define __NR_getrusage 165
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#define __NR_getsid 156
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#define __NR_getsockname 204
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#define __NR_getsockopt 209
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#define __NR_gettid 178
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#define __NR_gettimeofday 169
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#define __NR_getuid 174
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#define __NR_getxattr 8
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#define __NR_init_module 105
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#define __NR_inotify_add_watch 27
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#define __NR_inotify_init1 26
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#define __NR_inotify_rm_watch 28
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#define __NR_io_cancel 3
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#define __NR_io_destroy 1
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#define __NR_io_getevents 4
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#define __NR_io_pgetevents 292
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#define __NR_io_pgetevents_time64 416
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#define __NR_io_setup 0
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#define __NR_io_submit 2
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#define __NR_io_uring_enter 426
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#define __NR_io_uring_register 427
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#define __NR_io_uring_setup 425
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#define __NR_ioctl 29
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#define __NR_ioprio_get 31
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#define __NR_ioprio_set 30
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#define __NR_kcmp 272
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#define __NR_kexec_file_load 294
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#define __NR_kexec_load 104
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#define __NR_keyctl 219
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#define __NR_kill 129
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#define __NR_landlock_add_rule 445
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#define __NR_landlock_create_ruleset 444
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#define __NR_landlock_restrict_self 446
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#define __NR_lgetxattr 9
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#define __NR_linkat 37
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#define __NR_listen 201
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#define __NR_listxattr 11
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#define __NR_llistxattr 12
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#define __NR_llseek 62
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#define __NR_lookup_dcookie 18
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#define __NR_lremovexattr 15
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#define __NR_lsetxattr 6
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#define __NR_madvise 233
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#define __NR_mbind 235
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#define __NR_membarrier 283
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#define __NR_memfd_create 279
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#define __NR_migrate_pages 238
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#define __NR_mincore 232
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#define __NR_mkdirat 34
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#define __NR_mknodat 33
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#define __NR_mlock 228
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#define __NR_mlock2 284
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#define __NR_mlockall 230
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#define __NR_mmap2 222
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#define __NR_mount 40
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#define __NR_mount_setattr 442
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#define __NR_move_mount 429
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#define __NR_move_pages 239
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#define __NR_mprotect 226
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#define __NR_mq_getsetattr 185
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#define __NR_mq_notify 184
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#define __NR_mq_open 180
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#define __NR_mq_timedreceive 183
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#define __NR_mq_timedreceive_time64 419
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#define __NR_mq_timedsend 182
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#define __NR_mq_timedsend_time64 418
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#define __NR_mq_unlink 181
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#define __NR_mremap 216
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#define __NR_msgctl 187
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#define __NR_msgget 186
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#define __NR_msgrcv 188
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#define __NR_msgsnd 189
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#define __NR_msync 227
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#define __NR_munlock 229
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#define __NR_munlockall 231
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#define __NR_munmap 215
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#define __NR_name_to_handle_at 264
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#define __NR_nanosleep 101
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#define __NR_nfsservctl 42
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#define __NR_open_by_handle_at 265
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#define __NR_open_tree 428
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#define __NR_openat 56
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#define __NR_openat2 437
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#define __NR_or1k_atomic 244
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#define __NR_perf_event_open 241
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#define __NR_personality 92
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#define __NR_pidfd_getfd 438
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#define __NR_pidfd_open 434
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#define __NR_pidfd_send_signal 424
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#define __NR_pipe2 59
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#define __NR_pivot_root 41
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#define __NR_pkey_alloc 289
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#define __NR_pkey_free 290
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#define __NR_pkey_mprotect 288
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#define __NR_ppoll 73
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#define __NR_ppoll_time64 414
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#define __NR_prctl 167
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#define __NR_pread64 67
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#define __NR_preadv 69
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#define __NR_preadv2 286
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#define __NR_prlimit64 261
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#define __NR_process_madvise 440
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#define __NR_process_mrelease 448
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#define __NR_process_vm_readv 270
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#define __NR_process_vm_writev 271
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#define __NR_pselect6 72
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#define __NR_pselect6_time64 413
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#define __NR_ptrace 117
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#define __NR_pwrite64 68
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#define __NR_pwritev 70
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#define __NR_pwritev2 287
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#define __NR_quotactl 60
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#define __NR_quotactl_fd 443
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#define __NR_read 63
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#define __NR_readahead 213
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#define __NR_readlinkat 78
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#define __NR_readv 65
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#define __NR_reboot 142
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#define __NR_recvfrom 207
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#define __NR_recvmmsg 243
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#define __NR_recvmmsg_time64 417
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#define __NR_recvmsg 212
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#define __NR_remap_file_pages 234
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#define __NR_removexattr 14
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#define __NR_renameat 38
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#define __NR_renameat2 276
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#define __NR_request_key 218
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#define __NR_restart_syscall 128
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#define __NR_rseq 293
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#define __NR_rt_sigaction 134
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#define __NR_rt_sigpending 136
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#define __NR_rt_sigprocmask 135
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#define __NR_rt_sigqueueinfo 138
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#define __NR_rt_sigreturn 139
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#define __NR_rt_sigsuspend 133
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#define __NR_rt_sigtimedwait 137
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#define __NR_rt_sigtimedwait_time64 421
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#define __NR_rt_tgsigqueueinfo 240
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#define __NR_sched_get_priority_max 125
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#define __NR_sched_get_priority_min 126
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#define __NR_sched_getaffinity 123
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#define __NR_sched_getattr 275
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#define __NR_sched_getparam 121
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#define __NR_sched_getscheduler 120
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#define __NR_sched_rr_get_interval 127
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#define __NR_sched_rr_get_interval_time64 423
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#define __NR_sched_setaffinity 122
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#define __NR_sched_setattr 274
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#define __NR_sched_setparam 118
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#define __NR_sched_setscheduler 119
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#define __NR_sched_yield 124
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#define __NR_seccomp 277
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#define __NR_semctl 191
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#define __NR_semget 190
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#define __NR_semop 193
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#define __NR_semtimedop 192
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#define __NR_semtimedop_time64 420
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#define __NR_sendfile64 71
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#define __NR_sendmmsg 269
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#define __NR_sendmsg 211
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#define __NR_sendto 206
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#define __NR_set_mempolicy 237
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#define __NR_set_robust_list 99
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#define __NR_set_tid_address 96
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#define __NR_setdomainname 162
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#define __NR_setfsgid 152
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#define __NR_setfsuid 151
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#define __NR_setgid 144
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#define __NR_setgroups 159
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#define __NR_sethostname 161
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#define __NR_setitimer 103
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#define __NR_setns 268
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#define __NR_setpgid 154
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#define __NR_setpriority 140
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#define __NR_setregid 143
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#define __NR_setresgid 149
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#define __NR_setresuid 147
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#define __NR_setreuid 145
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#define __NR_setrlimit 164
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#define __NR_setsid 157
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#define __NR_setsockopt 208
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#define __NR_settimeofday 170
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#define __NR_setuid 146
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#define __NR_setxattr 5
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#define __NR_shmat 196
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#define __NR_shmctl 195
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#define __NR_shmdt 197
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#define __NR_shmget 194
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#define __NR_shutdown 210
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#define __NR_sigaltstack 132
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#define __NR_signalfd4 74
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#define __NR_socket 198
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#define __NR_socketpair 199
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#define __NR_splice 76
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#define __NR_statfs64 43
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#define __NR_statx 291
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#define __NR_swapoff 225
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#define __NR_swapon 224
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#define __NR_symlinkat 36
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#define __NR_sync 81
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#define __NR_sync_file_range 84
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#define __NR_syncfs 267
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#define __NR_sysinfo 179
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#define __NR_syslog 116
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#define __NR_tee 77
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#define __NR_tgkill 131
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#define __NR_timer_create 107
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#define __NR_timer_delete 111
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#define __NR_timer_getoverrun 109
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#define __NR_timer_gettime 108
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#define __NR_timer_gettime64 408
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#define __NR_timer_settime 110
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#define __NR_timer_settime64 409
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#define __NR_timerfd_create 85
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#define __NR_timerfd_gettime 87
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#define __NR_timerfd_gettime64 410
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#define __NR_timerfd_settime 86
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#define __NR_timerfd_settime64 411
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#define __NR_times 153
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#define __NR_tkill 130
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#define __NR_truncate64 45
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#define __NR_umask 166
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#define __NR_umount2 39
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#define __NR_uname 160
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#define __NR_unlinkat 35
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#define __NR_unshare 97
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#define __NR_userfaultfd 282
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#define __NR_utimensat 88
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#define __NR_utimensat_time64 412
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#define __NR_vhangup 58
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#define __NR_vmsplice 75
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#define __NR_wait4 260
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#define __NR_waitid 95
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#define __NR_write 64
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#define __NR_writev 66
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61
sysdeps/unix/sysv/linux/or1k/clone.c
Normal file
61
sysdeps/unix/sysv/linux/or1k/clone.c
Normal file
@ -0,0 +1,61 @@
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/* OpenRISC helper for the clone syscall.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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||||
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>
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#include <sysdep.h>
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extern int __or1k_clone (int (*fn)(void *), void *child_stack,
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int flags, void *arg, pid_t *ptid,
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void *tls, pid_t *ctid);
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||||
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||||
/* The OpenRISC ABI uses the stack for varargs like those using in clone
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||||
but the linux syscall ABI uses registers.
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||||
This function moves from varargs to regs. */
|
||||
int
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||||
__clone (int (*fn)(void *), void *child_stack,
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||||
int flags, void *arg, ...
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||||
/* 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)
|
||||
28
sysdeps/unix/sysv/linux/or1k/mmap_internal.h
Normal file
28
sysdeps/unix/sysv/linux/or1k/mmap_internal.h
Normal file
@ -0,0 +1,28 @@
|
||||
/* Common mmap definition for Linux implementation. OpenRISC version.
|
||||
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 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
|
||||
89
sysdeps/unix/sysv/linux/or1k/or1k_clone.S
Normal file
89
sysdeps/unix/sysv/linux/or1k/or1k_clone.S
Normal file
@ -0,0 +1,89 @@
|
||||
/* clone helper __or1k_clone for OpenRISC.
|
||||
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, 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)
|
||||
34
sysdeps/unix/sysv/linux/or1k/sysdep.c
Normal file
34
sysdeps/unix/sysv/linux/or1k/sysdep.c
Normal file
@ -0,0 +1,34 @@
|
||||
/* OpenRISC wrapper for setting errno.
|
||||
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>
|
||||
#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)
|
||||
201
sysdeps/unix/sysv/linux/or1k/sysdep.h
Normal file
201
sysdeps/unix/sysv/linux/or1k/sysdep.h
Normal file
@ -0,0 +1,201 @@
|
||||
/* Assembler and syscall macros. OpenRISC version.
|
||||
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_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 */
|
||||
Loading…
Reference in New Issue
Block a user