u-boot/common/malloc_simple.c
Philipp Rosenberger 596380db28 malloc_simple: fix malloc_ptr calculation
The gd->malloc_ptr and the gd->malloc_limit are offsets to gd->malloc_base.
But the addr variable contains the absolute address. The new_ptr must be:
addr + bytes - gd->malloc_base.

Signed-off-by: Philipp Rosenberger <ilu@linutronix.de>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2015-09-28 10:15:48 -04:00

54 lines
1 KiB
C

/*
* Simple malloc implementation
*
* Copyright (c) 2014 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <mapmem.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
void *malloc_simple(size_t bytes)
{
ulong new_ptr;
void *ptr;
new_ptr = gd->malloc_ptr + bytes;
if (new_ptr > gd->malloc_limit)
return NULL;
ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes);
gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
return ptr;
}
void *memalign_simple(size_t align, size_t bytes)
{
ulong addr, new_ptr;
void *ptr;
addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align);
new_ptr = addr + bytes - gd->malloc_base;
if (new_ptr > gd->malloc_limit)
return NULL;
ptr = map_sysmem(addr, bytes);
gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
return ptr;
}
#ifdef CONFIG_SYS_MALLOC_SIMPLE
void *calloc(size_t nmemb, size_t elem_size)
{
size_t size = nmemb * elem_size;
void *ptr;
ptr = malloc(size);
memset(ptr, '\0', size);
return ptr;
}
#endif