8953系列----在aboot中读取boot version_error:get image version failed!-优快云博客

本文介绍了一种从设备的Boot分区读取版本信息的方法。通过使用C语言编程，该方法能够在嵌入式系统中确定其运行固件的具体版本。文章详细展示了如何定位Boot分区、读取扇区内容并解析出版本字符串。

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在aboot.c中

void get_image_version(unsigned char *buf)
{
unsigned long long ptn = 0;
int index = INVALID_PTN;
char *src_ptr;
char *dest_str;
uint32_t ret = 0,blocksize;

src_ptr = malloc(PAGE_SIZE + 1); //先搞个buffer
memset((void*)src_ptr,0,PAGE_SIZE + 1);

index = partition_get_index("boot"); //获取boot在partition中的位置
if(!index)
{
dprintf(CRITICAL,"get boot index failed!\n");
goto error;
}

mmc_set_lun(partition_get_lun(index));

ptn = partition_get_offset(index); //获取offset
if(!ptn)
{
dprintf(CRITICAL,"get boot sector offset failed!\n");
goto error;
}

blocksize = mmc_get_device_blocksize(); //获取block大小

if(!src_ptr)
{
dprintf(CRITICAL, "Failed to allocate memory for src_ptr!\n");
goto error;
}

ret = mmc_read(ptn,(uint32_t*)src_ptr,blocksize); //读取内容
if(ret)
{
dprintf(CRITICAL,"read boot header info failed!\n");
goto error;
}

dest_str = findstr_in_binheader(src_ptr,"buildv=",512); //找到对应的字符串
if(!dest_str)
{
dprintf(CRITICAL,"get image version failed.\n");
goto error;
}

snprintf((char*)buf, MAX_RSP_SIZE, "%s",dest_str);

error:

free(src_ptr);

return;
}

char* findstr_in_binheader(char* src,const char* target,int src_size)
{
char *head,*tail,*pos,*result;
head = src;
tail = src + src_size;

for(pos = head; pos != tail;pos++)
{
if(!*pos)
continue;
if((result = strstr(pos,target)))
return result + strlen(target);
}
return NULL;
}