user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/sysdeps/linux/riscv64/arch-syscall.cpp

@@ -0,0 +1,117 @@
+#include <sys/syscall.h>
+#include <bits/syscall.h>
+
+using sc_word_t = __sc_word_t;
+
+sc_word_t __do_syscall0(long sc) {
+	register int sc_reg asm("a7") = sc;
+	register sc_word_t ret asm("a0");
+	asm volatile ("ecall" : "=r"(ret) : "r"(sc_reg) : "memory", "a1");
+	return ret;
+}
+
+sc_word_t __do_syscall1(long sc,
+		sc_word_t arg1) {
+	register int sc_reg asm("a7") = sc;
+	register sc_word_t arg1_reg asm("a0") = arg1;
+	register sc_word_t ret asm("a0");
+	asm volatile ("ecall" : "=r"(ret) :
+			"r"(sc_reg),
+			"r"(arg1_reg)
+			: "memory", "a1");
+	return ret;
+}
+
+sc_word_t __do_syscall2(long sc,
+		sc_word_t arg1, sc_word_t arg2) {
+	register int sc_reg asm("a7") = sc;
+	register sc_word_t arg1_reg asm("a0") = arg1;
+	register sc_word_t arg2_reg asm("a1") = arg2;
+	register sc_word_t ret asm("a0");
+	asm volatile ("ecall" : "=r"(ret) :
+			"r"(sc_reg),
+			"r"(arg1_reg),
+			"r"(arg2_reg)
+			: "memory");
+	return ret;
+}
+
+sc_word_t __do_syscall3(long sc,
+		sc_word_t arg1, sc_word_t arg2, sc_word_t arg3) {
+	register int sc_reg asm("a7") = sc;
+	register sc_word_t arg1_reg asm("a0") = arg1;
+	register sc_word_t arg2_reg asm("a1") = arg2;
+	register sc_word_t arg3_reg asm("a2") = arg3;
+	register sc_word_t ret asm("a0");
+	asm volatile ("ecall" : "=r"(ret) :
+			"r"(sc_reg),
+			"r"(arg1_reg),
+			"r"(arg2_reg),
+			"r"(arg3_reg)
+			: "memory");
+	return ret;
+}
+
+sc_word_t __do_syscall4(long sc,
+		sc_word_t arg1, sc_word_t arg2, sc_word_t arg3,
+		sc_word_t arg4) {
+	register int sc_reg asm("a7") = sc;
+	register sc_word_t arg1_reg asm("a0") = arg1;
+	register sc_word_t arg2_reg asm("a1") = arg2;
+	register sc_word_t arg3_reg asm("a2") = arg3;
+	register sc_word_t arg4_reg asm("a3") = arg4;
+	register sc_word_t ret asm("a0");
+	asm volatile ("ecall" : "=r"(ret) :
+			"r"(sc_reg),
+			"r"(arg1_reg),
+			"r"(arg2_reg),
+			"r"(arg3_reg),
+			"r"(arg4_reg)
+			: "memory");
+	return ret;
+}
+
+sc_word_t __do_syscall5(long sc,
+		sc_word_t arg1, sc_word_t arg2, sc_word_t arg3,
+		sc_word_t arg4, sc_word_t arg5) {
+	register int sc_reg asm("a7") = sc;
+	register sc_word_t arg1_reg asm("a0") = arg1;
+	register sc_word_t arg2_reg asm("a1") = arg2;
+	register sc_word_t arg3_reg asm("a2") = arg3;
+	register sc_word_t arg4_reg asm("a3") = arg4;
+	register sc_word_t arg5_reg asm("a4") = arg5;
+	register sc_word_t ret asm("a0");
+	asm volatile ("ecall" : "=r"(ret) :
+			"r"(sc_reg),
+			"r"(arg1_reg),
+			"r"(arg2_reg),
+			"r"(arg3_reg),
+			"r"(arg4_reg),
+			"r"(arg5_reg)
+			: "memory");
+	return ret;
+}
+
+sc_word_t __do_syscall6(long sc,
+		sc_word_t arg1, sc_word_t arg2, sc_word_t arg3,
+		sc_word_t arg4, sc_word_t arg5, sc_word_t arg6) {
+	register int sc_reg asm("a7") = sc;
+	register sc_word_t arg1_reg asm("a0") = arg1;
+	register sc_word_t arg2_reg asm("a1") = arg2;
+	register sc_word_t arg3_reg asm("a2") = arg3;
+	register sc_word_t arg4_reg asm("a3") = arg4;
+	register sc_word_t arg5_reg asm("a4") = arg5;
+	register sc_word_t arg6_reg asm("a5") = arg6;
+	register sc_word_t ret asm("a0");
+	asm volatile ("ecall" : "=r"(ret) :
+			"r"(sc_reg),
+			"r"(arg1_reg),
+			"r"(arg2_reg),
+			"r"(arg3_reg),
+			"r"(arg4_reg),
+			"r"(arg5_reg),
+			"r"(arg6_reg)
+			: "memory"
+			);
+	return ret;
+}

user/include/mlibc/sysdeps/linux/riscv64/cp_syscall.S

@@ -0,0 +1,30 @@
+.section .text
+.global __mlibc_do_asm_cp_syscall
+.global __mlibc_syscall_begin
+.global __mlibc_syscall_end
+.type __mlibc_do_asm_cp_syscall, "function"
+__mlibc_do_asm_cp_syscall:
+	sd a7, -8(sp)
+	mv a7, a0
+	mv a0, a1
+	mv a1, a2
+	mv a2, a3
+	mv a3, a4
+	mv a4, a5
+	mv a5, a6
+	ld a6, -8(sp) // a7
+	lw t0, -96(tp) // Tcb::cancelBits. See asserts in tcb.hpp.
+__mlibc_syscall_begin:
+	// tcbCancelEnableBit && tcbCancelTriggerBit
+	li t1, (1 << 0) | (1 << 2)
+	and t0, t0, t1
+	beq t0, t1, cancel
+	ecall
+__mlibc_syscall_end:
+	ret
+
+cancel:
+	call __mlibc_do_cancel
+	unimp
+.section .note.GNU-stack,"",%progbits
+

user/include/mlibc/sysdeps/linux/riscv64/crt-src/Scrt1.S

@@ -0,0 +1,30 @@
+.weak __global_pointer$
+.hidden __global_pointer$
+
+.section .text
+.global _start
+_start:
+	# Load gp.
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+
+	mv a0, sp
+	la a1, main
+	call __mlibc_entry@plt
+	unimp
+
+# Load gp from .preinit_array since it may be used by the executable's .init_array.
+# We still load it in _start to account for static binaries. This matches glibc's behavior.
+load_gp:
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+	ret
+
+.section .preinit_array,"aw"
+	.dword load_gp
+
+.section .note.GNU-stack,"",%progbits

user/include/mlibc/sysdeps/linux/riscv64/crt-src/crt1.S

@@ -0,0 +1,30 @@
+.weak __global_pointer$
+.hidden __global_pointer$
+
+.section .text
+.global _start
+_start:
+	# Load gp.
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+
+	mv a0, sp
+	la a1, main
+	call __mlibc_entry
+	unimp
+
+# Load gp from .preinit_array since it may be used by the executable's .init_array.
+# We still load it in _start to account for static binaries. This matches glibc's behavior.
+load_gp:
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+	ret
+
+.section .preinit_array,"aw"
+	.dword load_gp
+
+.section .note.GNU-stack,"",%progbits

user/include/mlibc/sysdeps/linux/riscv64/signals.S

@@ -0,0 +1,12 @@
+.section .text
+
+.global __mlibc_signal_restore
+.type __mlibc_signal_restore, @function
+__mlibc_signal_restore:
+.global __mlibc_signal_restore_rt
+.type __mlibc_signal_restore_rt, @function
+__mlibc_signal_restore_rt:
+	li a7, 139
+	ecall
+.section .note.GNU-stack,"",%progbits
+

user/include/mlibc/sysdeps/linux/riscv64/syscallnos.h

@@ -0,0 +1,328 @@
+#ifndef __MLIBC_SYSCALLNOS_h
+#define __MLIBC_SYSCALLNOS_h
+/* This file is autogenerated. Don't bother. */
+/* Generator script: sysdeps/linux/update-syscall-list.py. */
+#define __NR_io_setup 0
+#define __NR_io_destroy 1
+#define __NR_io_submit 2
+#define __NR_io_cancel 3
+#define __NR_io_getevents 4
+#define __NR_setxattr 5
+#define __NR_lsetxattr 6
+#define __NR_fsetxattr 7
+#define __NR_getxattr 8
+#define __NR_lgetxattr 9
+#define __NR_fgetxattr 10
+#define __NR_listxattr 11
+#define __NR_llistxattr 12
+#define __NR_flistxattr 13
+#define __NR_removexattr 14
+#define __NR_lremovexattr 15
+#define __NR_fremovexattr 16
+#define __NR_getcwd 17
+#define __NR_lookup_dcookie 18
+#define __NR_eventfd2 19
+#define __NR_epoll_create1 20
+#define __NR_epoll_ctl 21
+#define __NR_epoll_pwait 22
+#define __NR_dup 23
+#define __NR_dup3 24
+#define __NR_fcntl 25
+#define __NR_inotify_init1 26
+#define __NR_inotify_add_watch 27
+#define __NR_inotify_rm_watch 28
+#define __NR_ioctl 29
+#define __NR_ioprio_set 30
+#define __NR_ioprio_get 31
+#define __NR_flock 32
+#define __NR_mknodat 33
+#define __NR_mkdirat 34
+#define __NR_unlinkat 35
+#define __NR_symlinkat 36
+#define __NR_linkat 37
+#define __NR_umount2 39
+#define __NR_mount 40
+#define __NR_pivot_root 41
+#define __NR_nfsservctl 42
+#define __NR_statfs 43
+#define __NR_fstatfs 44
+#define __NR_truncate 45
+#define __NR_ftruncate 46
+#define __NR_fallocate 47
+#define __NR_faccessat 48
+#define __NR_chdir 49
+#define __NR_fchdir 50
+#define __NR_chroot 51
+#define __NR_fchmod 52
+#define __NR_fchmodat 53
+#define __NR_fchownat 54
+#define __NR_fchown 55
+#define __NR_openat 56
+#define __NR_close 57
+#define __NR_vhangup 58
+#define __NR_pipe2 59
+#define __NR_quotactl 60
+#define __NR_getdents64 61
+#define __NR_lseek 62
+#define __NR_read 63
+#define __NR_write 64
+#define __NR_readv 65
+#define __NR_writev 66
+#define __NR_pread64 67
+#define __NR_pwrite64 68
+#define __NR_preadv 69
+#define __NR_pwritev 70
+#define __NR_sendfile 71
+#define __NR_pselect6 72
+#define __NR_ppoll 73
+#define __NR_signalfd4 74
+#define __NR_vmsplice 75
+#define __NR_splice 76
+#define __NR_tee 77
+#define __NR_readlinkat 78
+#define __NR_newfstatat 79
+#define __NR_fstat 80
+#define __NR_sync 81
+#define __NR_fsync 82
+#define __NR_fdatasync 83
+#define __NR_sync_file_range 84
+#define __NR_timerfd_create 85
+#define __NR_timerfd_settime 86
+#define __NR_timerfd_gettime 87
+#define __NR_utimensat 88
+#define __NR_acct 89
+#define __NR_capget 90
+#define __NR_capset 91
+#define __NR_personality 92
+#define __NR_exit 93
+#define __NR_exit_group 94
+#define __NR_waitid 95
+#define __NR_set_tid_address 96
+#define __NR_unshare 97
+#define __NR_futex 98
+#define __NR_set_robust_list 99
+#define __NR_get_robust_list 100
+#define __NR_nanosleep 101
+#define __NR_getitimer 102
+#define __NR_setitimer 103
+#define __NR_kexec_load 104
+#define __NR_init_module 105
+#define __NR_delete_module 106
+#define __NR_timer_create 107
+#define __NR_timer_gettime 108
+#define __NR_timer_getoverrun 109
+#define __NR_timer_settime 110
+#define __NR_timer_delete 111
+#define __NR_clock_settime 112
+#define __NR_clock_gettime 113
+#define __NR_clock_getres 114
+#define __NR_clock_nanosleep 115
+#define __NR_syslog 116
+#define __NR_ptrace 117
+#define __NR_sched_setparam 118
+#define __NR_sched_setscheduler 119
+#define __NR_sched_getscheduler 120
+#define __NR_sched_getparam 121
+#define __NR_sched_setaffinity 122
+#define __NR_sched_getaffinity 123
+#define __NR_sched_yield 124
+#define __NR_sched_get_priority_max 125
+#define __NR_sched_get_priority_min 126
+#define __NR_sched_rr_get_interval 127
+#define __NR_restart_syscall 128
+#define __NR_kill 129
+#define __NR_tkill 130
+#define __NR_tgkill 131
+#define __NR_sigaltstack 132
+#define __NR_rt_sigsuspend 133
+#define __NR_rt_sigaction 134
+#define __NR_rt_sigprocmask 135
+#define __NR_rt_sigpending 136
+#define __NR_rt_sigtimedwait 137
+#define __NR_rt_sigqueueinfo 138
+#define __NR_rt_sigreturn 139
+#define __NR_setpriority 140
+#define __NR_getpriority 141
+#define __NR_reboot 142
+#define __NR_setregid 143
+#define __NR_setgid 144
+#define __NR_setreuid 145
+#define __NR_setuid 146
+#define __NR_setresuid 147
+#define __NR_getresuid 148
+#define __NR_setresgid 149
+#define __NR_getresgid 150
+#define __NR_setfsuid 151
+#define __NR_setfsgid 152
+#define __NR_times 153
+#define __NR_setpgid 154
+#define __NR_getpgid 155
+#define __NR_getsid 156
+#define __NR_setsid 157
+#define __NR_getgroups 158
+#define __NR_setgroups 159
+#define __NR_uname 160
+#define __NR_sethostname 161
+#define __NR_setdomainname 162
+#define __NR_getrlimit 163
+#define __NR_setrlimit 164
+#define __NR_getrusage 165
+#define __NR_umask 166
+#define __NR_prctl 167
+#define __NR_getcpu 168
+#define __NR_gettimeofday 169
+#define __NR_settimeofday 170
+#define __NR_adjtimex 171
+#define __NR_getpid 172
+#define __NR_getppid 173
+#define __NR_getuid 174
+#define __NR_geteuid 175
+#define __NR_getgid 176
+#define __NR_getegid 177
+#define __NR_gettid 178
+#define __NR_sysinfo 179
+#define __NR_mq_open 180
+#define __NR_mq_unlink 181
+#define __NR_mq_timedsend 182
+#define __NR_mq_timedreceive 183
+#define __NR_mq_notify 184
+#define __NR_mq_getsetattr 185
+#define __NR_msgget 186
+#define __NR_msgctl 187
+#define __NR_msgrcv 188
+#define __NR_msgsnd 189
+#define __NR_semget 190
+#define __NR_semctl 191
+#define __NR_semtimedop 192
+#define __NR_semop 193
+#define __NR_shmget 194
+#define __NR_shmctl 195
+#define __NR_shmat 196
+#define __NR_shmdt 197
+#define __NR_socket 198
+#define __NR_socketpair 199
+#define __NR_bind 200
+#define __NR_listen 201
+#define __NR_accept 202
+#define __NR_connect 203
+#define __NR_getsockname 204
+#define __NR_getpeername 205
+#define __NR_sendto 206
+#define __NR_recvfrom 207
+#define __NR_setsockopt 208
+#define __NR_getsockopt 209
+#define __NR_shutdown 210
+#define __NR_sendmsg 211
+#define __NR_recvmsg 212
+#define __NR_readahead 213
+#define __NR_brk 214
+#define __NR_munmap 215
+#define __NR_mremap 216
+#define __NR_add_key 217
+#define __NR_request_key 218
+#define __NR_keyctl 219
+#define __NR_clone 220
+#define __NR_execve 221
+#define __NR_mmap 222
+#define __NR_fadvise64 223
+#define __NR_swapon 224
+#define __NR_swapoff 225
+#define __NR_mprotect 226
+#define __NR_msync 227
+#define __NR_mlock 228
+#define __NR_munlock 229
+#define __NR_mlockall 230
+#define __NR_munlockall 231
+#define __NR_mincore 232
+#define __NR_madvise 233
+#define __NR_remap_file_pages 234
+#define __NR_mbind 235
+#define __NR_get_mempolicy 236
+#define __NR_set_mempolicy 237
+#define __NR_migrate_pages 238
+#define __NR_move_pages 239
+#define __NR_rt_tgsigqueueinfo 240
+#define __NR_perf_event_open 241
+#define __NR_accept4 242
+#define __NR_recvmmsg 243
+#define __NR_riscv_hwprobe 258
+#define __NR_riscv_flush_icache 259
+#define __NR_wait4 260
+#define __NR_prlimit64 261
+#define __NR_fanotify_init 262
+#define __NR_fanotify_mark 263
+#define __NR_name_to_handle_at 264
+#define __NR_open_by_handle_at 265
+#define __NR_clock_adjtime 266
+#define __NR_syncfs 267
+#define __NR_setns 268
+#define __NR_sendmmsg 269
+#define __NR_process_vm_readv 270
+#define __NR_process_vm_writev 271
+#define __NR_kcmp 272
+#define __NR_finit_module 273
+#define __NR_sched_setattr 274
+#define __NR_sched_getattr 275
+#define __NR_renameat2 276
+#define __NR_seccomp 277
+#define __NR_getrandom 278
+#define __NR_memfd_create 279
+#define __NR_bpf 280
+#define __NR_execveat 281
+#define __NR_userfaultfd 282
+#define __NR_membarrier 283
+#define __NR_mlock2 284
+#define __NR_copy_file_range 285
+#define __NR_preadv2 286
+#define __NR_pwritev2 287
+#define __NR_pkey_mprotect 288
+#define __NR_pkey_alloc 289
+#define __NR_pkey_free 290
+#define __NR_statx 291
+#define __NR_io_pgetevents 292
+#define __NR_rseq 293
+#define __NR_kexec_file_load 294
+#define __NR_pidfd_send_signal 424
+#define __NR_io_uring_setup 425
+#define __NR_io_uring_enter 426
+#define __NR_io_uring_register 427
+#define __NR_open_tree 428
+#define __NR_move_mount 429
+#define __NR_fsopen 430
+#define __NR_fsconfig 431
+#define __NR_fsmount 432
+#define __NR_fspick 433
+#define __NR_pidfd_open 434
+#define __NR_clone3 435
+#define __NR_close_range 436
+#define __NR_openat2 437
+#define __NR_pidfd_getfd 438
+#define __NR_faccessat2 439
+#define __NR_process_madvise 440
+#define __NR_epoll_pwait2 441
+#define __NR_mount_setattr 442
+#define __NR_quotactl_fd 443
+#define __NR_landlock_create_ruleset 444
+#define __NR_landlock_add_rule 445
+#define __NR_landlock_restrict_self 446
+#define __NR_memfd_secret 447
+#define __NR_process_mrelease 448
+#define __NR_futex_waitv 449
+#define __NR_set_mempolicy_home_node 450
+#define __NR_cachestat 451
+#define __NR_fchmodat2 452
+#define __NR_map_shadow_stack 453
+#define __NR_futex_wake 454
+#define __NR_futex_wait 455
+#define __NR_futex_requeue 456
+#define __NR_statmount 457
+#define __NR_listmount 458
+#define __NR_lsm_get_self_attr 459
+#define __NR_lsm_set_self_attr 460
+#define __NR_lsm_list_modules 461
+#define __NR_mseal 462
+#define __NR_setxattrat 463
+#define __NR_getxattrat 464
+#define __NR_listxattrat 465
+#define __NR_removexattrat 466
+#endif /* __MLIBC_SYSCALLNOS_h */

user/include/mlibc/sysdeps/linux/riscv64/thread_entry.S

@@ -0,0 +1,29 @@
+.section .text
+.global __mlibc_spawn_thread
+.type __mlibc_spawn_thread, "function"
+__mlibc_spawn_thread:
+	// __mlibc_spawn_thread(flags, stack, pid_out, child_tid, tls)
+	//                         a0,     a1,     a2,        a3,  a4
+	//           syscall(NR_clone, flags, stack, ptid, tls, ctid)
+	//                         a7,    a0,    a1,   a2,  a3,   a4
+
+	// Swap a3 <-> a4
+	mv a5, a4
+	mv a4, a3
+	mv a3, a5
+
+	li a7, 220 // NR_clone
+	ecall
+	bnez a0, .parent
+
+	ld a0, 0(sp)
+	ld a1, 8(sp)
+	addi sp, sp, 8
+	andi sp, sp, -16
+	call __mlibc_enter_thread
+	unimp
+
+.parent:
+	ret
+.section .note.GNU-stack,"",%progbits
+