[linux] Add most of the linux api

Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/x86/core/linux/linux_api.c

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+/** @file
+ *
+ * Implementation of most of the linux API.
+ */
+
+#include <linux_api.h>
+
+#include <stdarg.h>
+#include <asm/unistd.h>
+#include <string.h>
+
+int linux_open(const char *pathname, int flags)
+{
+	return linux_syscall(__NR_open, pathname, flags);
+}
+
+int linux_close(int fd)
+{
+	return linux_syscall(__NR_close, fd);
+}
+
+ssize_t linux_read(int fd, void *buf, size_t count)
+{
+	return linux_syscall(__NR_read, fd, buf, count);
+}
+
+ssize_t linux_write(int fd, const void *buf, size_t count)
+{
+	return linux_syscall(__NR_write, fd, buf, count);
+}
+
+int linux_fcntl(int fd, int cmd, ...)
+{
+	long arg;
+	va_list list;
+
+	va_start(list, cmd);
+	arg = va_arg(list, long);
+	va_end(list);
+
+	return linux_syscall(__NR_fcntl, fd, cmd, arg);
+}
+
+int linux_ioctl(int fd, int request, ...)
+{
+	void *arg;
+	va_list list;
+
+	va_start(list, request);
+	arg = va_arg(list, void *);
+	va_end(list);
+
+	return linux_syscall(__NR_ioctl, fd, request, arg);
+}
+
+int linux_poll(struct pollfd *fds, nfds_t nfds, int timeout)
+{
+	return linux_syscall(__NR_poll, fds, nfds, timeout);
+}
+
+int linux_nanosleep(const struct timespec *req, struct timespec *rem)
+{
+	return linux_syscall(__NR_nanosleep, req, rem);
+}
+
+int linux_usleep(useconds_t usec)
+{
+	struct timespec ts = {
+		.tv_sec = (long) (usec / 1000000),
+		.tv_nsec = (long) (usec % 1000000) * 1000ul
+	};
+
+	return linux_nanosleep(&ts, NULL);
+}
+
+int linux_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+	return linux_syscall(__NR_gettimeofday, tv, tz);
+}
+
+void *linux_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
+{
+	return (void *)linux_syscall(__SYSCALL_mmap, addr, length, prot, flags, fd, offset);
+}
+
+void *linux_mremap(void *old_address, size_t old_size, size_t new_size, int flags)
+{
+	return (void *)linux_syscall(__NR_mremap, old_address, old_size, new_size, flags);
+}
+
+int linux_munmap(void *addr, size_t length)
+{
+	return linux_syscall(__NR_munmap, addr, length);
+}

src/arch/x86/core/linux/linux_strerror.c

@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+/** @file
+ *
+ * linux_strerror implementation
+ */
+
+#include <linux_api.h>
+#include <stdio.h>
+
+/** Error names from glibc */
+static const char *errors[] = {
+	"Success",
+	"Operation not permitted",
+	"No such file or directory",
+	"No such process",
+	"Interrupted system call",
+	"Input/output error",
+	"No such device or address",
+	"Argument list too long",
+	"Exec format error",
+	"Bad file descriptor",
+	"No child processes",
+	"Resource temporarily unavailable",
+	"Cannot allocate memory",
+	"Permission denied",
+	"Bad address",
+	"Block device required",
+	"Device or resource busy",
+	"File exists",
+	"Invalid cross-device link",
+	"No such device",
+	"Not a directory",
+	"Is a directory",
+	"Invalid argument",
+	"Too many open files in system",
+	"Too many open files",
+	"Inappropriate ioctl for device",
+	"Text file busy",
+	"File too large",
+	"No space left on device",
+	"Illegal seek",
+	"Read-only file system",
+	"Too many links",
+	"Broken pipe",
+	"Numerical argument out of domain",
+	"Numerical result out of range",
+	"Resource deadlock avoided",
+	"File name too long",
+	"No locks available",
+	"Function not implemented",
+	"Directory not empty",
+	"Too many levels of symbolic links",
+	"",
+	"No message of desired type",
+	"Identifier removed",
+	"Channel number out of range",
+	"Level 2 not synchronized",
+	"Level 3 halted",
+	"Level 3 reset",
+	"Link number out of range",
+	"Protocol driver not attached",
+	"No CSI structure available",
+	"Level 2 halted",
+	"Invalid exchange",
+	"Invalid request descriptor",
+	"Exchange full",
+	"No anode",
+	"Invalid request code",
+	"Invalid slot",
+	"",
+	"Bad font file format",
+	"Device not a stream",
+	"No data available",
+	"Timer expired",
+	"Out of streams resources",
+	"Machine is not on the network",
+	"Package not installed",
+	"Object is remote",
+	"Link has been severed",
+	"Advertise error",
+	"Srmount error",
+	"Communication error on send",
+	"Protocol error",
+	"Multihop attempted",
+	"RFS specific error",
+	"Bad message",
+	"Value too large for defined data type",
+	"Name not unique on network",
+	"File descriptor in bad state",
+	"Remote address changed",
+	"Can not access a needed shared library",
+	"Accessing a corrupted shared library",
+	".lib section in a.out corrupted",
+	"Attempting to link in too many shared libraries",
+	"Cannot exec a shared library directly",
+	"Invalid or incomplete multibyte or wide character",
+	"Interrupted system call should be restarted",
+	"Streams pipe error",
+	"Too many users",
+	"Socket operation on non-socket",
+	"Destination address required",
+	"Message too long",
+	"Protocol wrong type for socket",
+	"Protocol not available",
+	"Protocol not supported",
+	"Socket type not supported",
+	"Operation not supported",
+	"Protocol family not supported",
+	"Address family not supported by protocol",
+	"Address already in use",
+	"Cannot assign requested address",
+	"Network is down",
+	"Network is unreachable",
+	"Network dropped connection on reset",
+	"Software caused connection abort",
+	"Connection reset by peer",
+	"No buffer space available",
+	"Transport endpoint is already connected",
+	"Transport endpoint is not connected",
+	"Cannot send after transport endpoint shutdown",
+	"Too many references: cannot splice",
+	"Connection timed out",
+	"Connection refused",
+	"Host is down",
+	"No route to host",
+	"Operation already in progress",
+	"Operation now in progress",
+	"Stale NFS file handle",
+	"Structure needs cleaning",
+	"Not a XENIX named type file",
+	"No XENIX semaphores available",
+	"Is a named type file",
+	"Remote I/O error",
+	"Disk quota exceeded",
+	"No medium found",
+	"Wrong medium type",
+};
+
+const char *linux_strerror(int errnum)
+{
+	static char errbuf[64];
+	static int errors_size = sizeof(errors) / sizeof(*errors);
+	
+	if (errnum >= errors_size || errnum < 0) {
+		snprintf(errbuf, sizeof(errbuf), "Error %#08x", errnum);
+		return errbuf;
+	} else {
+		return errors[errnum];
+	}
+}