/*
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*
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* (C) COPYRIGHT 2014, 2017 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained
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* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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/* Kernel UTF utility functions */
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#include <linux/mutex.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/printk.h>
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#include <kutf/kutf_utils.h>
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#include <kutf/kutf_mem.h>
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static char tmp_buffer[KUTF_MAX_DSPRINTF_LEN];
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DEFINE_MUTEX(buffer_lock);
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const char *kutf_dsprintf(struct kutf_mempool *pool,
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const char *fmt, ...)
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{
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va_list args;
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int len;
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int size;
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void *buffer;
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mutex_lock(&buffer_lock);
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va_start(args, fmt);
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len = vsnprintf(tmp_buffer, sizeof(tmp_buffer), fmt, args);
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va_end(args);
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if (len < 0) {
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pr_err("kutf_dsprintf: Bad format dsprintf format %s\n", fmt);
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goto fail_format;
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}
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if (len >= sizeof(tmp_buffer)) {
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pr_warn("kutf_dsprintf: Truncated dsprintf message %s\n", fmt);
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size = sizeof(tmp_buffer);
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} else {
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size = len + 1;
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}
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buffer = kutf_mempool_alloc(pool, size);
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if (!buffer)
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goto fail_alloc;
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memcpy(buffer, tmp_buffer, size);
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mutex_unlock(&buffer_lock);
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return buffer;
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fail_alloc:
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fail_format:
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mutex_unlock(&buffer_lock);
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return NULL;
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}
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EXPORT_SYMBOL(kutf_dsprintf);
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