user: implement mlibc as the libc, finally.

It's finally done..

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

user/include/mlibc/sysdeps/linux/x86_64/arch-syscall.cpp

@@ -0,0 +1,78 @@
+#include <sys/syscall.h>
+#include <bits/syscall.h>
+
+using sc_word_t = __sc_word_t;
+
+sc_word_t __do_syscall0(long sc) {
+	sc_word_t ret;
+	asm volatile ("syscall" : "=a"(ret)
+			: "a"(sc)
+			: "rcx", "r11", "memory");
+	return ret;
+}
+
+sc_word_t __do_syscall1(long sc,
+		sc_word_t arg1) {
+	sc_word_t ret;
+	asm volatile ("syscall" : "=a"(ret)
+			: "a"(sc), "D"(arg1)
+			: "rcx", "r11", "memory");
+	return ret;
+}
+
+sc_word_t __do_syscall2(long sc,
+		sc_word_t arg1, sc_word_t arg2) {
+	sc_word_t ret;
+	asm volatile ("syscall" : "=a"(ret)
+			: "a"(sc), "D"(arg1), "S"(arg2)
+			: "rcx", "r11", "memory");
+	return ret;
+}
+
+sc_word_t __do_syscall3(long sc,
+		sc_word_t arg1, sc_word_t arg2, sc_word_t arg3) {
+	sc_word_t ret;
+	asm volatile ("syscall" : "=a"(ret)
+			: "a"(sc), "D"(arg1), "S"(arg2), "d"(arg3)
+			: "rcx", "r11", "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) {
+	sc_word_t ret;
+	register sc_word_t arg4_reg asm("r10") = arg4;
+	asm volatile ("syscall" : "=a"(ret)
+			: "a"(sc), "D"(arg1), "S"(arg2), "d"(arg3),
+				"r"(arg4_reg)
+			: "rcx", "r11", "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) {
+	sc_word_t ret;
+	register sc_word_t arg4_reg asm("r10") = arg4;
+	register sc_word_t arg5_reg asm("r8") = arg5;
+	asm volatile ("syscall" : "=a"(ret)
+			: "a"(sc), "D"(arg1), "S"(arg2), "d"(arg3),
+				"r"(arg4_reg), "r"(arg5_reg)
+			: "rcx", "r11", "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) {
+	sc_word_t ret;
+	register sc_word_t arg4_reg asm("r10") = arg4;
+	register sc_word_t arg5_reg asm("r8") = arg5;
+	register sc_word_t arg6_reg asm("r9") = arg6;
+	asm volatile ("syscall" : "=a"(ret)
+			: "a"(sc), "D"(arg1), "S"(arg2), "d"(arg3),
+				"r"(arg4_reg), "r"(arg5_reg), "r"(arg6_reg)
+			: "rcx", "r11", "memory");
+	return ret;
+}

user/include/mlibc/sysdeps/linux/x86_64/assembly-asserts.cpp

@@ -0,0 +1,23 @@
+#include <abi-bits/signal.h>
+#include <stddef.h>
+#include "context-offsets.h"
+
+// offsets int ucontext_t as used in signals.S
+static_assert(offsetof(ucontext_t, uc_mcontext) == UCONTEXT_GREGS_OFFSET);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R8]) == UCONTEXT_OFFSET_R8);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R9]) == UCONTEXT_OFFSET_R9);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R10]) == UCONTEXT_OFFSET_R10);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R11]) == UCONTEXT_OFFSET_R11);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R12]) == UCONTEXT_OFFSET_R12);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R13]) == UCONTEXT_OFFSET_R13);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R14]) == UCONTEXT_OFFSET_R14);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R15]) == UCONTEXT_OFFSET_R15);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RDI]) == UCONTEXT_OFFSET_RDI);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RSI]) == UCONTEXT_OFFSET_RSI);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RBP]) == UCONTEXT_OFFSET_RBP);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RBX]) == UCONTEXT_OFFSET_RBX);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RDX]) == UCONTEXT_OFFSET_RDX);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RAX]) == UCONTEXT_OFFSET_RAX);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RCX]) == UCONTEXT_OFFSET_RCX);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RSP]) == UCONTEXT_OFFSET_RSP);
+static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RIP]) == UCONTEXT_OFFSET_RIP);

user/include/mlibc/sysdeps/linux/x86_64/context-offsets.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#define UCONTEXT_GREGS_OFFSET 40
+
+#define UCONTEXT_OFFSET_R8 (UCONTEXT_GREGS_OFFSET + 0)
+#define UCONTEXT_OFFSET_R9 (UCONTEXT_GREGS_OFFSET + 8)
+#define UCONTEXT_OFFSET_R10 (UCONTEXT_GREGS_OFFSET + 16)
+#define UCONTEXT_OFFSET_R11 (UCONTEXT_GREGS_OFFSET + 24)
+#define UCONTEXT_OFFSET_R12 (UCONTEXT_GREGS_OFFSET + 32)
+#define UCONTEXT_OFFSET_R13 (UCONTEXT_GREGS_OFFSET + 40)
+#define UCONTEXT_OFFSET_R14 (UCONTEXT_GREGS_OFFSET + 48)
+#define UCONTEXT_OFFSET_R15 (UCONTEXT_GREGS_OFFSET + 56)
+#define UCONTEXT_OFFSET_RDI (UCONTEXT_GREGS_OFFSET + 64)
+#define UCONTEXT_OFFSET_RSI (UCONTEXT_GREGS_OFFSET + 72)
+#define UCONTEXT_OFFSET_RBP (UCONTEXT_GREGS_OFFSET + 80)
+#define UCONTEXT_OFFSET_RBX (UCONTEXT_GREGS_OFFSET + 88)
+#define UCONTEXT_OFFSET_RDX (UCONTEXT_GREGS_OFFSET + 96)
+#define UCONTEXT_OFFSET_RAX (UCONTEXT_GREGS_OFFSET + 104)
+#define UCONTEXT_OFFSET_RCX (UCONTEXT_GREGS_OFFSET + 112)
+#define UCONTEXT_OFFSET_RSP (UCONTEXT_GREGS_OFFSET + 120)
+#define UCONTEXT_OFFSET_RIP (UCONTEXT_GREGS_OFFSET + 128)

user/include/mlibc/sysdeps/linux/x86_64/cp_syscall.S

@@ -0,0 +1,29 @@
+
+.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:
+	mov %rdi, %rax
+	mov %rsi, %rdi
+	mov %rdx, %rsi
+	mov %rcx, %rdx
+	mov %r8, %r10
+	mov %r9, %r8
+	mov 8(%rsp), %r9
+	mov %fs:0x30, %r11
+__mlibc_syscall_begin:
+	/* tcbCancelEnableBit && tcbCancelTriggerBit */
+	and $((1 << 0) | (1 << 2)), %r11
+	cmp $((1 << 0) | (1 << 2)), %r11
+	je cancel
+	syscall
+__mlibc_syscall_end:
+	ret
+
+cancel:
+	call __mlibc_do_cancel
+	hlt
+.section .note.GNU-stack,"",%progbits
+

user/include/mlibc/sysdeps/linux/x86_64/crt-src/Scrt1.S

@@ -0,0 +1,8 @@
+.section .text
+.global _start
+_start:
+	mov %rsp, %rdi
+	lea main(%rip), %rsi
+	call __mlibc_entry
+.section .note.GNU-stack,"",%progbits
+

user/include/mlibc/sysdeps/linux/x86_64/crt-src/crt1.S

@@ -0,0 +1,8 @@
+.section .text
+.global _start
+_start:
+	mov %rsp, %rdi
+	mov $main, %rsi
+	call __mlibc_entry
+.section .note.GNU-stack,"",%progbits
+

user/include/mlibc/sysdeps/linux/x86_64/crt-src/crti.S

@@ -0,0 +1,11 @@
+.section .init
+.global _init
+_init:
+	push %rax
+
+.section .fini
+.global _fini
+_fini:
+	push %rax
+.section .note.GNU-stack,"",%progbits
+

user/include/mlibc/sysdeps/linux/x86_64/crt-src/crtn.S

@@ -0,0 +1,9 @@
+.section .init
+	pop %rax
+	ret
+
+.section .fini
+	pop %rax
+	ret
+.section .note.GNU-stack,"",%progbits
+

user/include/mlibc/sysdeps/linux/x86_64/signals.S

@@ -0,0 +1,36 @@
+#include "mlibc-asm/dwarf-helpers.h"
+#include "mlibc-asm/helpers.h"
+#include "context-offsets.h"
+#include "syscallnos.h"
+
+.section .text
+.cfi_startproc
+.cfi_signal_frame
+	cfi_set_cfa_to_ptr_with_offset DWARF_REG_RSP, UCONTEXT_OFFSET_RSP
+	cfi_set_prev_reg_value DWARF_REG_R8, DWARF_REG_RSP, UCONTEXT_OFFSET_R8
+	cfi_set_prev_reg_value DWARF_REG_R9, DWARF_REG_RSP, UCONTEXT_OFFSET_R9
+	cfi_set_prev_reg_value DWARF_REG_R10, DWARF_REG_RSP, UCONTEXT_OFFSET_R10
+	cfi_set_prev_reg_value DWARF_REG_R11, DWARF_REG_RSP, UCONTEXT_OFFSET_R11
+	cfi_set_prev_reg_value DWARF_REG_R12, DWARF_REG_RSP, UCONTEXT_OFFSET_R12
+	cfi_set_prev_reg_value DWARF_REG_R13, DWARF_REG_RSP, UCONTEXT_OFFSET_R13
+	cfi_set_prev_reg_value DWARF_REG_R14, DWARF_REG_RSP, UCONTEXT_OFFSET_R14
+	cfi_set_prev_reg_value DWARF_REG_R15, DWARF_REG_RSP, UCONTEXT_OFFSET_R15
+	cfi_set_prev_reg_value DWARF_REG_RDI, DWARF_REG_RSP, UCONTEXT_OFFSET_RDI
+	cfi_set_prev_reg_value DWARF_REG_RSI, DWARF_REG_RSP, UCONTEXT_OFFSET_RSI
+	cfi_set_prev_reg_value DWARF_REG_RBP, DWARF_REG_RSP, UCONTEXT_OFFSET_RBP
+	cfi_set_prev_reg_value DWARF_REG_RBX, DWARF_REG_RSP, UCONTEXT_OFFSET_RBX
+	cfi_set_prev_reg_value DWARF_REG_RDX, DWARF_REG_RSP, UCONTEXT_OFFSET_RDX
+	cfi_set_prev_reg_value DWARF_REG_RAX, DWARF_REG_RSP, UCONTEXT_OFFSET_RAX
+	cfi_set_prev_reg_value DWARF_REG_RCX, DWARF_REG_RSP, UCONTEXT_OFFSET_RCX
+	cfi_set_prev_reg_value DWARF_REG_RETURN_ADDRESS, DWARF_REG_RSP, UCONTEXT_OFFSET_RIP
+	nop
+
+PROC_START_NOCFI(__mlibc_signal_restore)
+PROC_ALIAS(__mlibc_signal_restore, __mlibc_signal_restore_rt)
+	mov $__NR_rt_sigreturn, %rax
+	syscall
+	ud2
+PROC_END(__mlibc_signal_restore)
+
+GNU_STACK_NOTE()
+

user/include/mlibc/sysdeps/linux/x86_64/syscallnos.h

@@ -0,0 +1,379 @@
+#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_read 0
+#define __NR_write 1
+#define __NR_open 2
+#define __NR_close 3
+#define __NR_stat 4
+#define __NR_fstat 5
+#define __NR_lstat 6
+#define __NR_poll 7
+#define __NR_lseek 8
+#define __NR_mmap 9
+#define __NR_mprotect 10
+#define __NR_munmap 11
+#define __NR_brk 12
+#define __NR_rt_sigaction 13
+#define __NR_rt_sigprocmask 14
+#define __NR_rt_sigreturn 15
+#define __NR_ioctl 16
+#define __NR_pread64 17
+#define __NR_pwrite64 18
+#define __NR_readv 19
+#define __NR_writev 20
+#define __NR_access 21
+#define __NR_pipe 22
+#define __NR_select 23
+#define __NR_sched_yield 24
+#define __NR_mremap 25
+#define __NR_msync 26
+#define __NR_mincore 27
+#define __NR_madvise 28
+#define __NR_shmget 29
+#define __NR_shmat 30
+#define __NR_shmctl 31
+#define __NR_dup 32
+#define __NR_dup2 33
+#define __NR_pause 34
+#define __NR_nanosleep 35
+#define __NR_getitimer 36
+#define __NR_alarm 37
+#define __NR_setitimer 38
+#define __NR_getpid 39
+#define __NR_sendfile 40
+#define __NR_socket 41
+#define __NR_connect 42
+#define __NR_accept 43
+#define __NR_sendto 44
+#define __NR_recvfrom 45
+#define __NR_sendmsg 46
+#define __NR_recvmsg 47
+#define __NR_shutdown 48
+#define __NR_bind 49
+#define __NR_listen 50
+#define __NR_getsockname 51
+#define __NR_getpeername 52
+#define __NR_socketpair 53
+#define __NR_setsockopt 54
+#define __NR_getsockopt 55
+#define __NR_clone 56
+#define __NR_fork 57
+#define __NR_vfork 58
+#define __NR_execve 59
+#define __NR_exit 60
+#define __NR_wait4 61
+#define __NR_kill 62
+#define __NR_uname 63
+#define __NR_semget 64
+#define __NR_semop 65
+#define __NR_semctl 66
+#define __NR_shmdt 67
+#define __NR_msgget 68
+#define __NR_msgsnd 69
+#define __NR_msgrcv 70
+#define __NR_msgctl 71
+#define __NR_fcntl 72
+#define __NR_flock 73
+#define __NR_fsync 74
+#define __NR_fdatasync 75
+#define __NR_truncate 76
+#define __NR_ftruncate 77
+#define __NR_getdents 78
+#define __NR_getcwd 79
+#define __NR_chdir 80
+#define __NR_fchdir 81
+#define __NR_rename 82
+#define __NR_mkdir 83
+#define __NR_rmdir 84
+#define __NR_creat 85
+#define __NR_link 86
+#define __NR_unlink 87
+#define __NR_symlink 88
+#define __NR_readlink 89
+#define __NR_chmod 90
+#define __NR_fchmod 91
+#define __NR_chown 92
+#define __NR_fchown 93
+#define __NR_lchown 94
+#define __NR_umask 95
+#define __NR_gettimeofday 96
+#define __NR_getrlimit 97
+#define __NR_getrusage 98
+#define __NR_sysinfo 99
+#define __NR_times 100
+#define __NR_ptrace 101
+#define __NR_getuid 102
+#define __NR_syslog 103
+#define __NR_getgid 104
+#define __NR_setuid 105
+#define __NR_setgid 106
+#define __NR_geteuid 107
+#define __NR_getegid 108
+#define __NR_setpgid 109
+#define __NR_getppid 110
+#define __NR_getpgrp 111
+#define __NR_setsid 112
+#define __NR_setreuid 113
+#define __NR_setregid 114
+#define __NR_getgroups 115
+#define __NR_setgroups 116
+#define __NR_setresuid 117
+#define __NR_getresuid 118
+#define __NR_setresgid 119
+#define __NR_getresgid 120
+#define __NR_getpgid 121
+#define __NR_setfsuid 122
+#define __NR_setfsgid 123
+#define __NR_getsid 124
+#define __NR_capget 125
+#define __NR_capset 126
+#define __NR_rt_sigpending 127
+#define __NR_rt_sigtimedwait 128
+#define __NR_rt_sigqueueinfo 129
+#define __NR_rt_sigsuspend 130
+#define __NR_sigaltstack 131
+#define __NR_utime 132
+#define __NR_mknod 133
+#define __NR_uselib 134
+#define __NR_personality 135
+#define __NR_ustat 136
+#define __NR_statfs 137
+#define __NR_fstatfs 138
+#define __NR_sysfs 139
+#define __NR_getpriority 140
+#define __NR_setpriority 141
+#define __NR_sched_setparam 142
+#define __NR_sched_getparam 143
+#define __NR_sched_setscheduler 144
+#define __NR_sched_getscheduler 145
+#define __NR_sched_get_priority_max 146
+#define __NR_sched_get_priority_min 147
+#define __NR_sched_rr_get_interval 148
+#define __NR_mlock 149
+#define __NR_munlock 150
+#define __NR_mlockall 151
+#define __NR_munlockall 152
+#define __NR_vhangup 153
+#define __NR_modify_ldt 154
+#define __NR_pivot_root 155
+#define __NR__sysctl 156
+#define __NR_prctl 157
+#define __NR_arch_prctl 158
+#define __NR_adjtimex 159
+#define __NR_setrlimit 160
+#define __NR_chroot 161
+#define __NR_sync 162
+#define __NR_acct 163
+#define __NR_settimeofday 164
+#define __NR_mount 165
+#define __NR_umount2 166
+#define __NR_swapon 167
+#define __NR_swapoff 168
+#define __NR_reboot 169
+#define __NR_sethostname 170
+#define __NR_setdomainname 171
+#define __NR_iopl 172
+#define __NR_ioperm 173
+#define __NR_create_module 174
+#define __NR_init_module 175
+#define __NR_delete_module 176
+#define __NR_get_kernel_syms 177
+#define __NR_query_module 178
+#define __NR_quotactl 179
+#define __NR_nfsservctl 180
+#define __NR_getpmsg 181
+#define __NR_gettid 186
+#define __NR_readahead 187
+#define __NR_setxattr 188
+#define __NR_lsetxattr 189
+#define __NR_fsetxattr 190
+#define __NR_getxattr 191
+#define __NR_lgetxattr 192
+#define __NR_fgetxattr 193
+#define __NR_listxattr 194
+#define __NR_llistxattr 195
+#define __NR_flistxattr 196
+#define __NR_removexattr 197
+#define __NR_lremovexattr 198
+#define __NR_fremovexattr 199
+#define __NR_tkill 200
+#define __NR_time 201
+#define __NR_futex 202
+#define __NR_sched_setaffinity 203
+#define __NR_sched_getaffinity 204
+#define __NR_set_thread_area 205
+#define __NR_io_setup 206
+#define __NR_io_destroy 207
+#define __NR_io_getevents 208
+#define __NR_io_submit 209
+#define __NR_io_cancel 210
+#define __NR_get_thread_area 211
+#define __NR_lookup_dcookie 212
+#define __NR_epoll_create 213
+#define __NR_epoll_ctl_old 214
+#define __NR_epoll_wait_old 215
+#define __NR_remap_file_pages 216
+#define __NR_getdents64 217
+#define __NR_set_tid_address 218
+#define __NR_restart_syscall 219
+#define __NR_semtimedop 220
+#define __NR_fadvise64 221
+#define __NR_timer_create 222
+#define __NR_timer_settime 223
+#define __NR_timer_gettime 224
+#define __NR_timer_getoverrun 225
+#define __NR_timer_delete 226
+#define __NR_clock_settime 227
+#define __NR_clock_gettime 228
+#define __NR_clock_getres 229
+#define __NR_clock_nanosleep 230
+#define __NR_exit_group 231
+#define __NR_epoll_wait 232
+#define __NR_epoll_ctl 233
+#define __NR_tgkill 234
+#define __NR_utimes 235
+#define __NR_mbind 237
+#define __NR_set_mempolicy 238
+#define __NR_get_mempolicy 239
+#define __NR_mq_open 240
+#define __NR_mq_unlink 241
+#define __NR_mq_timedsend 242
+#define __NR_mq_timedreceive 243
+#define __NR_mq_notify 244
+#define __NR_mq_getsetattr 245
+#define __NR_kexec_load 246
+#define __NR_waitid 247
+#define __NR_add_key 248
+#define __NR_request_key 249
+#define __NR_keyctl 250
+#define __NR_ioprio_set 251
+#define __NR_ioprio_get 252
+#define __NR_inotify_init 253
+#define __NR_inotify_add_watch 254
+#define __NR_inotify_rm_watch 255
+#define __NR_migrate_pages 256
+#define __NR_openat 257
+#define __NR_mkdirat 258
+#define __NR_mknodat 259
+#define __NR_fchownat 260
+#define __NR_futimesat 261
+#define __NR_newfstatat 262
+#define __NR_unlinkat 263
+#define __NR_renameat 264
+#define __NR_linkat 265
+#define __NR_symlinkat 266
+#define __NR_readlinkat 267
+#define __NR_fchmodat 268
+#define __NR_faccessat 269
+#define __NR_pselect6 270
+#define __NR_ppoll 271
+#define __NR_unshare 272
+#define __NR_set_robust_list 273
+#define __NR_get_robust_list 274
+#define __NR_splice 275
+#define __NR_tee 276
+#define __NR_sync_file_range 277
+#define __NR_vmsplice 278
+#define __NR_move_pages 279
+#define __NR_utimensat 280
+#define __NR_epoll_pwait 281
+#define __NR_signalfd 282
+#define __NR_timerfd_create 283
+#define __NR_eventfd 284
+#define __NR_fallocate 285
+#define __NR_timerfd_settime 286
+#define __NR_timerfd_gettime 287
+#define __NR_accept4 288
+#define __NR_signalfd4 289
+#define __NR_eventfd2 290
+#define __NR_epoll_create1 291
+#define __NR_dup3 292
+#define __NR_pipe2 293
+#define __NR_inotify_init1 294
+#define __NR_preadv 295
+#define __NR_pwritev 296
+#define __NR_rt_tgsigqueueinfo 297
+#define __NR_perf_event_open 298
+#define __NR_recvmmsg 299
+#define __NR_fanotify_init 300
+#define __NR_fanotify_mark 301
+#define __NR_prlimit64 302
+#define __NR_name_to_handle_at 303
+#define __NR_open_by_handle_at 304
+#define __NR_clock_adjtime 305
+#define __NR_syncfs 306
+#define __NR_sendmmsg 307
+#define __NR_setns 308
+#define __NR_getcpu 309
+#define __NR_process_vm_readv 310
+#define __NR_process_vm_writev 311
+#define __NR_kcmp 312
+#define __NR_finit_module 313
+#define __NR_sched_setattr 314
+#define __NR_sched_getattr 315
+#define __NR_renameat2 316
+#define __NR_seccomp 317
+#define __NR_getrandom 318
+#define __NR_memfd_create 319
+#define __NR_kexec_file_load 320
+#define __NR_bpf 321
+#define __NR_execveat 322
+#define __NR_userfaultfd 323
+#define __NR_membarrier 324
+#define __NR_mlock2 325
+#define __NR_copy_file_range 326
+#define __NR_preadv2 327
+#define __NR_pwritev2 328
+#define __NR_pkey_mprotect 329
+#define __NR_pkey_alloc 330
+#define __NR_pkey_free 331
+#define __NR_statx 332
+#define __NR_io_pgetevents 333
+#define __NR_rseq 334
+#define __NR_uretprobe 335
+#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/x86_64/thread_entry.S

@@ -0,0 +1,26 @@
+#include "mlibc-asm/helpers.h"
+#include "syscallnos.h"
+
+.section .text
+
+PROC_START(__mlibc_spawn_thread)
+	xor %eax, %eax
+	/* The rest of the args are already in the right registers,
+	* only need to fixup rcx to r10
+	*/
+	mov %rcx, %r10
+	mov $__NR_clone, %rax
+	syscall
+	test %eax, %eax
+	jnz 1f
+	xor %ebp, %ebp
+	pop %rdi
+	pop %rsi
+	call __mlibc_enter_thread
+	hlt
+1:
+	ret
+PROC_END(__mlibc_spawn_thread)
+
+GNU_STACK_NOTE()
+