Add build system scaffolding and libc headers

15 files changed, 631 insertions, 0 deletions

diff --git a/lib/libc/include/__alpha.h b/lib/libc/include/__alpha.h
new file mode 100644
index 00000000..f2e8bfb1
--- /dev/null
+++ b/lib/libc/include/__alpha.h
@@ -0,0 +1,233 @@
+/* Alpha ISO8859-1 font data */
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+	255, 255, 223, 100, 222, 255, 235, 239, 255, 255, 255, 255, 255, 255,
+	255, 191, 231, 223, 223, 255, 255, 255, 123, 95, 252, 253, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63, 255, 255,
+	255, 253, 255, 255, 247, 255, 255, 255, 247, 255, 255, 223, 255, 255,
+	255, 223, 255, 255, 127, 255, 255, 255, 127, 255, 255, 255, 253, 255,
+	255, 255, 253, 255, 255, 247, 207, 255, 255, 255, 255, 255, 255, 127,
+	255, 255, 249, 219, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 31, 128, 63, 255,
+	67, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	255, 255, 255, 255, 255, 15, 255, 3, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 31, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255,
+	255, 255, 143, 8, 255, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 239, 255, 255, 255, 150, 254, 247, 10, 132, 234, 150,
+	170, 150, 247, 247, 94, 255, 251, 255, 15, 238, 251, 255, 15, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 3, 255, 255, 255, 3,
+	255, 255, 255, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
diff --git a/lib/libc/include/__dirent.h b/lib/libc/include/__dirent.h
new file mode 100644
index 00000000..9b23c9d2
--- /dev/null
+++ b/lib/libc/include/__dirent.h
@@ -0,0 +1,25 @@
+#ifndef __LIBC_DIRENT_H
+#define __LIBC_DIRENT_H
+
+#include <libc.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <stdint.h>
+
+struct linux_dirent64 {
+	uint64_t d_ino;
+	int64_t d_off;
+	unsigned short d_reclen;
+	unsigned char d_type;
+	char d_name[];
+};
+
+struct __DIR {
+	int fildes;
+	int cached;
+	off_t tell;
+	off_t offset;
+	char buffer[BUFSIZ] __attribute__((__aligned__(8)));
+};
+
+#endif
diff --git a/lib/libc/include/__locale.h b/lib/libc/include/__locale.h
new file mode 100644
index 00000000..0a709c78
--- /dev/null
+++ b/lib/libc/include/__locale.h
@@ -0,0 +1,41 @@
+#ifndef __LIBC_LOCALE_H
+#define __LIBC_LOCALE_H
+
+#include <locale.h>
+#include <stdint.h>
+
+typedef __SIZE_TYPE__ size_t;
+
+struct __locale_t {
+	struct __locale_map {
+		const void *map;
+		size_t map_size;
+		char name[24];
+	} maps[6];
+};
+
+typedef struct __locale_t *locale_t;
+
+static const struct __locale_t __c_locale = { 0 };
+
+static const struct __locale_t __utf8_locale = {
+	.maps[LC_CTYPE] = { .map = &((const uint32_t[]){ 0x950412de, 0, -1, -1,
+							 -1 }),
+			    .map_size = sizeof(uint32_t) * 5,
+			    .name = "C.UTF-8" },
+};
+
+#undef MB_CUR_MAX
+#define MB_CUR_MAX (((locale_t) & __utf8_locale) ? 4 : 1)
+
+static inline int __mb_cur_max(void)
+{
+	return MB_CUR_MAX;
+}
+
+static inline int __locale_allocated(locale_t loc)
+{
+	return loc != (locale_t)&__c_locale && loc != (locale_t)&__utf8_locale;
+}
+
+#endif
diff --git a/lib/libc/include/__select.h b/lib/libc/include/__select.h
new file mode 100644
index 00000000..a38bbdce
--- /dev/null
+++ b/lib/libc/include/__select.h
@@ -0,0 +1,8 @@
+#ifndef __LIBC_SELECT_H
+#define __LIBC_SELECT_H
+
+struct __fd_set {
+	unsigned long fds_bits[16];
+};
+
+#endif
diff --git a/lib/libc/include/__signal.h b/lib/libc/include/__signal.h
new file mode 100644
index 00000000..6b762dee
--- /dev/null
+++ b/lib/libc/include/__signal.h
@@ -0,0 +1,12 @@
+#ifndef __LIBC_SIGNAL_H
+#define __LIBC_SIGNAL_H
+
+static const char *__sys_signame[] = {
+	"SIGHUP",    "SIGINT",	"SIGQUIT",  "SIGILL",  "SIGTRAP", "SIGABRT",
+	"SIGBUS",    "SIGFPE",	"SIGKILL",  "SIGUSR1", "SIGSEGV", "SIGUSR2",
+	"SIGPIPE",   "SIGALRM", "SIGTERM",  "SIGCHLD", "SIGCONT", "SIGSTOP",
+	"SIGTSTP",   "SIGTTIN", "SIGTTOU",  "SIGURG",  "SIGXCPU", "SIGXFSZ",
+	"SIGVTALRM", "SIGPROF", "SIGWINCH", "SIGIO",   "SIGSYS"
+};
+
+#endif
diff --git a/lib/libc/include/__statvfs.h b/lib/libc/include/__statvfs.h
new file mode 100644
index 00000000..c8a746d4
--- /dev/null
+++ b/lib/libc/include/__statvfs.h
@@ -0,0 +1,21 @@
+#ifndef __LIBC_STATVFS_H__
+#define __LIBC_STATVFS_H__
+
+typedef __UINT64_TYPE__ fsblkcnt_t;
+typedef __UINT64_TYPE__ fsfilcnt_t;
+
+struct __statvfs {
+	unsigned long f_bsize;
+	unsigned long f_frsize;
+	fsblkcnt_t f_blocks;
+	fsblkcnt_t f_bfree;
+	fsblkcnt_t f_bavail;
+	fsfilcnt_t f_files;
+	fsfilcnt_t f_ffree;
+	fsfilcnt_t f_favail;
+	unsigned long f_fsid;
+	unsigned long f_flag;
+	unsigned long f_namemax;
+};
+
+#endif
diff --git a/lib/libc/include/atomic.h b/lib/libc/include/atomic.h
new file mode 100644
index 00000000..94cd34db
--- /dev/null
+++ b/lib/libc/include/atomic.h
@@ -0,0 +1,23 @@
+#ifndef __LIBC_ATOMIC_H
+#define __LIBC_ATOMIC_H
+
+#include <stdatomic.h>
+
+#define LIBC_LOCK(__lock)   __libc_lock(&__lock)
+#define LIBC_UNLOCK(__lock) atomic_flag_clear(&__lock)
+
+static __inline void __libc_lock(volatile atomic_flag *lock)
+{
+	while (atomic_flag_test_and_set_explicit(lock, memory_order_acquire)) {
+		unsigned int spins = 1;
+		do {
+			for (unsigned int i = 0; i < spins; i++)
+				__asm__ volatile("pause");
+			if (spins < 64)
+				spins *= 2;
+		} while (atomic_flag_test_and_set_explicit(
+			lock, memory_order_relaxed));
+	}
+}
+
+#endif
diff --git a/lib/libc/include/byteswap.h b/lib/libc/include/byteswap.h
new file mode 100644
index 00000000..9dfe6520
--- /dev/null
+++ b/lib/libc/include/byteswap.h
@@ -0,0 +1,8 @@
+#ifndef __LIBC_BYTESWAP_H
+#define __LIBC_BYTESWAP_H
+
+#define bswap16(x) __builtin_bswap16(x)
+#define bswap32(x) __builtin_bswap32(x)
+#define bswap64(x) __builtin_bswap64(x)
+
+#endif
diff --git a/lib/libc/include/features.h b/lib/libc/include/features.h
new file mode 100644
index 00000000..62472259
--- /dev/null
+++ b/lib/libc/include/features.h
@@ -0,0 +1,6 @@
+#ifndef __LIBC_FEATURES_H
+#define __LIBC_FEATURES_H
+
+#define weak extern __attribute__((weak))
+
+#endif
diff --git a/lib/libc/include/io.h b/lib/libc/include/io.h
new file mode 100644
index 00000000..675a3cc3
--- /dev/null
+++ b/lib/libc/include/io.h
@@ -0,0 +1,55 @@
+#ifndef __LIBC_IO
+#define __LIBC_IO
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <stdatomic.h>
+
+typedef __SIZE_TYPE__ size_t;
+
+#define _IO_ERR	 0x4
+#define _IO_EOF	 0x8
+#define _IO_WIDE 0x10
+
+/* Buffering modes */
+#define _IOFBF 0 /* Full buffering */
+#define _IOLBF 1 /* Line buffering */
+#define _IONBF 2 /* No buffering */
+
+/* File access modes */
+#ifndef O_RDONLY
+#define O_RDONLY  0
+#define O_WRONLY  1
+#define O_RDWR	  2
+#define O_ACCMODE 3
+#endif
+
+/* Atomic operations for threading */
+#define LIBC_LOCK(x)                             \
+	while (atomic_flag_test_and_set(&(x))) { \
+	}
+#define LIBC_UNLOCK(x) atomic_flag_clear(&(x))
+
+struct __FILE {
+	int fd;
+	uint32_t flags;
+	int type;
+	pid_t pid;
+	atomic_flag lock;
+	char *buf;
+	int eof;
+	size_t buf_size;
+	size_t buf_pos;
+	size_t buf_len;
+	unsigned char unget_buf[16];
+	size_t unget_cnt;
+	off_t offset;
+	struct __FILE *next;
+};
+
+void __libc_fadd(struct __FILE *f);
+
+#endif
diff --git a/lib/libc/include/libc.h b/lib/libc/include/libc.h
new file mode 100644
index 00000000..3f5f2644
--- /dev/null
+++ b/lib/libc/include/libc.h
@@ -0,0 +1,27 @@
+#ifndef __LIBC_LIBC_H
+#define __LIBC_LIBC_H
+
+#include <__locale.h>
+#include <stdatomic.h>
+
+#define likely(x)     __builtin_expect(!!(x), 1)
+#define unlikely(x)   __builtin_expect(!!(x), 0)
+#define unused	      __attribute__((unused))
+#define aligned(type) __attribute__((aligned(__alignof__(type))))
+#define weak	      __attribute__((__weak__))
+#define weak_reference(old, new) \
+	extern __typeof(old) new __attribute__((__weak__, __alias__(#old)))
+
+static struct {
+	enum {
+		LIBC_ENVP_TOUCHED = 1 << 0,
+	} flags;
+	struct {
+		volatile atomic_flag abort;
+		volatile atomic_flag malloc;
+		volatile atomic_flag environ;
+	} lock;
+	struct __locale_t locale;
+} libc = { .lock = { ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT } };
+
+#endif
diff --git a/lib/libc/include/libc/dirent.h b/lib/libc/include/libc/dirent.h
new file mode 100644
index 00000000..296cc91e
--- /dev/null
+++ b/lib/libc/include/libc/dirent.h
@@ -0,0 +1,6 @@
+#ifndef __LIBC_DIRENT_H
+#define __LIBC_DIRENT_H
+
+struct __DIR {};
+
+#endif
diff --git a/lib/libc/include/malloc.h b/lib/libc/include/malloc.h
new file mode 100644
index 00000000..ba2755b0
--- /dev/null
+++ b/lib/libc/include/malloc.h
@@ -0,0 +1,98 @@
+#ifndef __LIBC_MALLOC_H
+#define __LIBC_MALLOC_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdatomic.h>
+
+struct class {
+	uint32_t size;
+	uint32_t count;
+};
+
+struct page {
+	volatile atomic_flag lock;
+
+	enum {
+		PAGE_SMALL = 0x0,
+		PAGE_MEDIUM = 0x1,
+		PAGE_LARGE = 0x2,
+	} flags;
+
+	struct {
+		uint32_t size;
+		uint32_t used;
+		uint32_t count;
+	} block;
+
+	uint8_t *bitmap;
+	uint8_t *heap;
+
+	struct page *next;
+	struct page *prev;
+};
+
+extern struct page *__malloc_pvec;
+
+#define SMALL_PAGE_SIZE_SHIFT 16
+#define SMALL_PAGE_SIZE	      (1 << SMALL_PAGE_SIZE_SHIFT)
+#define SMALL_PAGE_MASK	      (~((uintptr_t)SMALL_PAGE_SIZE - 1))
+
+#define MEDIUM_PAGE_SIZE_SHIFT 22
+#define MEDIUM_PAGE_SIZE       (1 << MEDIUM_PAGE_SIZE_SHIFT)
+#define MEDIUM_PAGE_MASK       (~((uintptr_t)MEDIUM_PAGE_SIZE - 1))
+
+#define LARGE_PAGE_SIZE_SHIFT 26
+#define LARGE_PAGE_SIZE	      (1 << LARGE_PAGE_SIZE_SHIFT)
+#define LARGE_PAGE_MASK	      (~((uintptr_t)LARGE_PAGE_SIZE - 1))
+
+#define SMALL_CLASS(n) \
+	{ (n * 16), (SMALL_PAGE_SIZE - sizeof(struct page)) / (n * 16) }
+#define MEDIUM_CLASS(n) \
+	{ (n * 16), (MEDIUM_PAGE_SIZE - sizeof(struct page)) / (n * 16) }
+#define LARGE_CLASS(n) \
+	{ (n * 16), (LARGE_PAGE_SIZE - sizeof(struct page)) / (n * 16) }
+
+static const struct class global_size_class[] = {
+	SMALL_CLASS(1),	     SMALL_CLASS(1),	  SMALL_CLASS(2),
+	SMALL_CLASS(3),	     SMALL_CLASS(4),	  SMALL_CLASS(5),
+	SMALL_CLASS(6),	     SMALL_CLASS(7),	  SMALL_CLASS(8),
+	SMALL_CLASS(9),	     SMALL_CLASS(10),	  SMALL_CLASS(11),
+	SMALL_CLASS(12),     SMALL_CLASS(13),	  SMALL_CLASS(14),
+	SMALL_CLASS(15),     SMALL_CLASS(16),	  SMALL_CLASS(17),
+	SMALL_CLASS(18),     SMALL_CLASS(19),	  SMALL_CLASS(20),
+	SMALL_CLASS(21),     SMALL_CLASS(22),	  SMALL_CLASS(23),
+	SMALL_CLASS(24),     SMALL_CLASS(25),	  SMALL_CLASS(26),
+	SMALL_CLASS(27),     SMALL_CLASS(28),	  SMALL_CLASS(29),
+	SMALL_CLASS(30),     SMALL_CLASS(31),	  SMALL_CLASS(32),
+	SMALL_CLASS(33),     SMALL_CLASS(34),	  SMALL_CLASS(35),
+	SMALL_CLASS(36),     SMALL_CLASS(37),	  SMALL_CLASS(38),
+	SMALL_CLASS(39),     SMALL_CLASS(40),	  SMALL_CLASS(41),
+	SMALL_CLASS(42),     SMALL_CLASS(43),	  SMALL_CLASS(44),
+	SMALL_CLASS(45),     SMALL_CLASS(46),	  SMALL_CLASS(47),
+	SMALL_CLASS(48),     SMALL_CLASS(49),	  SMALL_CLASS(50),
+	SMALL_CLASS(51),     SMALL_CLASS(52),	  SMALL_CLASS(53),
+	SMALL_CLASS(54),     SMALL_CLASS(55),	  SMALL_CLASS(56),
+	SMALL_CLASS(57),     SMALL_CLASS(58),	  SMALL_CLASS(59),
+	SMALL_CLASS(60),     SMALL_CLASS(61),	  SMALL_CLASS(62),
+	SMALL_CLASS(63),     SMALL_CLASS(64),	  SMALL_CLASS(80),
+	SMALL_CLASS(96),     SMALL_CLASS(112),	  SMALL_CLASS(128),
+	SMALL_CLASS(160),    SMALL_CLASS(192),	  SMALL_CLASS(224),
+	SMALL_CLASS(256),    MEDIUM_CLASS(320),	  MEDIUM_CLASS(384),
+	MEDIUM_CLASS(448),   MEDIUM_CLASS(512),	  MEDIUM_CLASS(640),
+	MEDIUM_CLASS(768),   MEDIUM_CLASS(896),	  MEDIUM_CLASS(1024),
+	MEDIUM_CLASS(1280),  MEDIUM_CLASS(1536),  MEDIUM_CLASS(1792),
+	MEDIUM_CLASS(2048),  MEDIUM_CLASS(2560),  MEDIUM_CLASS(3072),
+	MEDIUM_CLASS(3584),  MEDIUM_CLASS(4096),  MEDIUM_CLASS(5120),
+	MEDIUM_CLASS(6144),  MEDIUM_CLASS(7168),  MEDIUM_CLASS(8192),
+	MEDIUM_CLASS(10240), MEDIUM_CLASS(12288), MEDIUM_CLASS(14336),
+	MEDIUM_CLASS(16384), LARGE_CLASS(20480),  LARGE_CLASS(24576),
+	LARGE_CLASS(28672),  LARGE_CLASS(32768),  LARGE_CLASS(40960),
+	LARGE_CLASS(49152),  LARGE_CLASS(57344),  LARGE_CLASS(65536),
+	LARGE_CLASS(81920),  LARGE_CLASS(98304),  LARGE_CLASS(114688),
+	LARGE_CLASS(131072), LARGE_CLASS(163840), LARGE_CLASS(196608),
+	LARGE_CLASS(229376), LARGE_CLASS(262144), LARGE_CLASS(327680),
+	LARGE_CLASS(393216), LARGE_CLASS(458752), LARGE_CLASS(524288)
+};
+
+#endif
diff --git a/lib/libc/include/syscall.h b/lib/libc/include/syscall.h
new file mode 100644
index 00000000..645c4bcd
--- /dev/null
+++ b/lib/libc/include/syscall.h
@@ -0,0 +1,59 @@
+#ifndef __LIBC_SYSCALL_H
+#define __LIBC_SYSCALL_H
+
+#include <asm/syscall.h>
+#include <asm/unistd_64.h>
+#include <errno.h>
+
+typedef long syscall_arg_t;
+
+#define __SYSCALL_NARGS_(a, b, c, d, e, f, g, h, n, ...) n
+#define __SYSCALL_NARGS(...) \
+	__SYSCALL_NARGS_(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0, )
+
+#define __SYSCALL_CONCAT_(a, b) a##b
+#define __SYSCALL_CONCAT(a, b)	__SYSCALL_CONCAT_(a, b)
+
+#define __SYSCALL_(b, ...) \
+	__SYSCALL_CONCAT(b, __SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
+
+#define __syscall(...) __SYSCALL_(__syscall_, __VA_ARGS__)
+#define syscall(...)   __syscall_ret(__syscall(__VA_ARGS__))
+
+#define __sa(x) ((syscall_arg_t)(x))
+
+#define __syscall_0(n)		__syscall0(__NR_##n)
+#define __syscall_1(n, a)	__syscall1(__NR_##n, __sa(a))
+#define __syscall_2(n, a, b)	__syscall2(__NR_##n, __sa(a), __sa(b))
+#define __syscall_3(n, a, b, c) __syscall3(__NR_##n, __sa(a), __sa(b), __sa(c))
+#define __syscall_4(n, a, b, c, d) \
+	__syscall4(__NR_##n, __sa(a), __sa(b), __sa(c), __sa(d))
+#define __syscall_5(n, a, b, c, d, e) \
+	__syscall5(__NR_##n, __sa(a), __sa(b), __sa(c), __sa(d), __sa(e))
+#define __syscall_6(n, a, b, c, d, e, f)                                  \
+	__syscall6(__NR_##n, __sa(a), __sa(b), __sa(c), __sa(d), __sa(e), \
+		   __sa(f))
+#define __syscall_7(n, a, b, c, d, e, f, g)                               \
+	__syscall7(__NR_##n, __sa(a), __sa(b), __sa(c), __sa(d), __sa(e), \
+		   __sa(f), __sa(g))
+
+static __inline long __syscall_ret(long ret)
+{
+	if (ret > -4096 && ret < 0) {
+		errno = -ret;
+		ret = -1;
+	}
+	return ret;
+}
+
+#ifdef __NR_pread64
+#undef __NR_pread
+#define __NR_pread __NR_pread64
+#endif
+
+#ifdef __NR_pwrite64
+#undef __NR_pwrite
+#define __NR_pwrite __NR_pwrite64
+#endif
+
+#endif
diff --git a/lib/libc/include/thread.h b/lib/libc/include/thread.h
new file mode 100644
index 00000000..662f1dc1
--- /dev/null
+++ b/lib/libc/include/thread.h
@@ -0,0 +1,9 @@
+#ifndef __LIBC_THREAD_H
+#define __LIBC_THREAD_H
+
+struct __thread_self {
+	int tid;
+	int _errno;
+};
+
+#endif