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/*
* Copyright (c) 2022, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <arch_helpers.h>
#include <host_shared_data.h>
/*
* A printf formatted function used in the Realm world to log messages
* in the shared buffer.
* Locate the shared logging buffer and print its content
*/
void realm_printf(const char *fmt, ...)
{
host_shared_data_t *guest_shared_data = realm_get_shared_structure();
char *log_buffer = (char *)guest_shared_data->log_buffer;
va_list args;
va_start(args, fmt);
spin_lock((spinlock_t *)&guest_shared_data->printf_lock);
if (strnlen((const char *)log_buffer, MAX_BUF_SIZE) == MAX_BUF_SIZE) {
(void)memset((char *)log_buffer, 0, MAX_BUF_SIZE);
}
(void)vsnprintf((char *)log_buffer +
strnlen((const char *)log_buffer, MAX_BUF_SIZE),
MAX_BUF_SIZE, fmt, args);
spin_unlock((spinlock_t *)&guest_shared_data->printf_lock);
va_end(args);
}
void __attribute__((__noreturn__)) do_panic(const char *file, int line)
{
realm_printf("PANIC in file: %s line: %d\n", file, line);
while (true) {
continue;
}
}
/* This is used from printf() when crash dump is reached */
int console_putc(int c)
{
host_shared_data_t *guest_shared_data = realm_get_shared_structure();
char *log_buffer = (char *)guest_shared_data->log_buffer;
if ((c < 0) || (c > 127)) {
return -1;
}
spin_lock((spinlock_t *)&guest_shared_data->printf_lock);
if (strnlen((const char *)log_buffer, MAX_BUF_SIZE) == MAX_BUF_SIZE) {
(void)memset((char *)log_buffer, 0, MAX_BUF_SIZE);
}
*((char *)log_buffer + strnlen((const char *)log_buffer, MAX_BUF_SIZE)) = c;
spin_unlock((spinlock_t *)&guest_shared_data->printf_lock);
return c;
}
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