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/*
* hl_open.c -- provide _open().
*
* Copyright (c) 2024 Synopsys Inc.
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*
*/
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include "hl_toolchain.h"
#include "hl_api.h"
/* Map newlib open flags into Hostlink IO ones. */
static __always_inline uint32_t
_hl_open_flags_map (int flags)
{
uint32_t hl_flags = 0;
hl_flags |= (flags & O_RDONLY) ? 0x0000 : 0;
hl_flags |= (flags & O_WRONLY) ? 0x0001 : 0;
hl_flags |= (flags & O_RDWR) ? 0x0002 : 0;
hl_flags |= (flags & O_APPEND) ? 0x0008 : 0;
hl_flags |= (flags & O_CREAT) ? 0x0100 : 0;
hl_flags |= (flags & O_TRUNC) ? 0x0200 : 0;
hl_flags |= (flags & O_EXCL) ? 0x0400 : 0;
return hl_flags;
}
/* Open file on host. Implements HL_SYSCALL_OPEN. */
static __always_inline int
_hl_open (const char *path, int flags, mode_t mode)
{
int32_t fd;
uint32_t host_errno;
uint32_t hl_flags = _hl_open_flags_map (flags);
volatile __uncached char *p;
p = _hl_message (HL_SYSCALL_OPEN, "sii:ii",
path, /* s */
(uint32_t) hl_flags, /* i */
(uint32_t) mode, /* i */
(uint32_t *) &fd, /* :i */
(uint32_t *) &host_errno /* :i */);
if (p == NULL)
{
errno = ETIMEDOUT;
fd = -1;
}
else if (fd < 0)
{
errno = host_errno;
fd = -1;
}
_hl_delete ();
return fd;
}
int
_open (const char *path, int flags, ...)
{
va_list ap;
mode_t mode = 0;
va_start (ap, flags);
if (flags & O_CREAT)
mode = va_arg (ap, mode_t);
return _hl_open (path, flags, mode);
}
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