compiler: Add specific errno.h file for EWARM compilation

Error values use in the library are not POSIX. Unlike the GNU gcc,the
EWARM toolchain doesn't support error such as EINVAL. To ensure coherency
in error management we have to ensure that library and application use
the same errno. Currently an "errno.h" is provided at application level
which makes GCC work correctly, but this is not the case for the IAR.
the added list is based on FreeBSD errno.h.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>

lib/CMakeLists.txt

@@ -13,6 +13,7 @@ collect (PROJECT_LIB_HEADERS condition.h)
 collect (PROJECT_LIB_HEADERS config.h)
 collect (PROJECT_LIB_HEADERS cpu.h)
 collect (PROJECT_LIB_HEADERS device.h)
+collect (PROJECT_LIB_HEADERS errno.h)
 collect (PROJECT_LIB_HEADERS dma.h)
 collect (PROJECT_LIB_HEADERS io.h)
 collect (PROJECT_LIB_HEADERS irq.h)

lib/compiler/iar/CMakeLists.txt

@@ -1,3 +1,4 @@
 collect (PROJECT_LIB_HEADERS compiler.h)
+collect (PROJECT_LIB_HEADERS errno.h)
 
 # vim: expandtab:ts=2:sw=2:smartindent

lib/compiler/iar/errno.h

@@ -0,0 +1,60 @@
+/*-
+ * Copyright (c) 2020 STMicroelectronics. All rights reserved.
+ *
+ * Copyright (c) 1982, 1986, 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __METAL_IAR_ERRNO__H__
+#define __METAL_IAR_ERRNO__H__
+
+#include <errno.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LIBMETAL_ERR_BASE  100
+
+#define	EPERM	(LIBMETAL_ERR_BASE + 1)  /* Operation not permitted */
+#define	ENOENT	(LIBMETAL_ERR_BASE + 2)  /* No such file or directory */
+#define	ESRCH	(LIBMETAL_ERR_BASE + 3)  /* No such process */
+#define	EINTR	(LIBMETAL_ERR_BASE + 4)  /* Interrupted system call */
+#define	EIO	(LIBMETAL_ERR_BASE + 5)  /* Input/output error */
+#define	ENXIO	(LIBMETAL_ERR_BASE + 6)  /* Device not configured */
+#define	E2BIG	(LIBMETAL_ERR_BASE + 7)  /* Argument list too long */
+#define	ENOEXEC	(LIBMETAL_ERR_BASE + 8)  /* Exec format error */
+#define	EBADF	(LIBMETAL_ERR_BASE + 9)  /* Bad file descriptor */
+#define	ECHILD	(LIBMETAL_ERR_BASE + 10) /* No child processes */
+#define	EDEADLK	(LIBMETAL_ERR_BASE + 11) /* Resource deadlock avoided */
+#define	ENOMEM	(LIBMETAL_ERR_BASE + 12) /* Cannot allocate memory */
+#define	EACCES	(LIBMETAL_ERR_BASE + 13) /* Permission denied */
+#define	EFAULT	(LIBMETAL_ERR_BASE + 14) /* Bad address */
+#define	ENOTBLK	(LIBMETAL_ERR_BASE + 15) /* Block device required */
+#define	EBUSY	(LIBMETAL_ERR_BASE + 16) /* Device busy */
+#define	EEXIST	(LIBMETAL_ERR_BASE + 17) /* File exists */
+#define	EXDEV	(LIBMETAL_ERR_BASE + 18) /* Cross-device link */
+#define	ENODEV	(LIBMETAL_ERR_BASE + 19) /* Operation not supported by device */
+#define	ENOTDIR	(LIBMETAL_ERR_BASE + 20) /* Not a directory */
+#define	EISDIR	(LIBMETAL_ERR_BASE + 21) /* Is a directory */
+#define	EINVAL	(LIBMETAL_ERR_BASE + 22) /* Invalid argument */
+#define	ENFILE	(LIBMETAL_ERR_BASE + 23) /* Too many open files in system */
+#define	EMFILE	(LIBMETAL_ERR_BASE + 24) /* Too many open files */
+#define	ENOTTY	(LIBMETAL_ERR_BASE + 25) /* Inappropriate ioctl for device */
+#define	ETXTBSY	(LIBMETAL_ERR_BASE + 26) /* Text file busy */
+#define	EFBIG	(LIBMETAL_ERR_BASE + 27) /* File too large */
+#define	ENOSPC	(LIBMETAL_ERR_BASE + 28) /* No space left on device */
+#define	ESPIPE	(LIBMETAL_ERR_BASE + 29) /* Illegal seek */
+#define	EROFS	(LIBMETAL_ERR_BASE + 30) /* Read-only filesystem */
+#define	EMLINK	(LIBMETAL_ERR_BASE + 31) /* Too many links */
+#define	EPIPE	(LIBMETAL_ERR_BASE + 32) /* Broken pipe */
+#define	EAGAIN	(LIBMETAL_ERR_BASE + 35) /* Resource temporarily unavailable */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __METAL_IAR_ERRNO__H__ */

lib/errno.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2020 STMicroelectronnics. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file      metal/errno.h
+ * @brief     error specific primitives for libmetal.
+ */
+
+#ifndef __METAL_ERRNO__H__
+#define __METAL_ERRNO__H__
+
+#if defined(__ICCARM__)
+# include <metal/compiler/iar/errno.h>
+#else
+# include <errno.h>
+#endif
+
+#endif /* __METAL_ERRNO__H__ */