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/*
* Copyright (c) 2019, Remi Pommarel <repk@triplefau.lt>
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <endian.h>
#define DEFAULT_PROGNAME "doimage"
#define PROGNAME(argc, argv) (((argc) >= 1) ? ((argv)[0]) : DEFAULT_PROGNAME)
#define BL31_MAGIC 0x12348765
#define BL31_LOADADDR 0x05100000
#define BUFLEN 512
static inline void usage(char const *prog)
{
fprintf(stderr, "Usage: %s <bl31.bin> <bl31.img>\n", prog);
}
static inline int fdwrite(int fd, uint8_t *data, size_t len)
{
ssize_t nr;
size_t l;
int ret = -1;
for (l = 0; l < len; l += nr) {
nr = write(fd, data + l, len - l);
if (nr < 0) {
perror("Cannot write to bl31.img");
goto out;
}
}
ret = 0;
out:
return ret;
}
int main(int argc, char **argv)
{
int fin, fout, ret = -1;
ssize_t len;
uint32_t data;
uint8_t buf[BUFLEN];
if (argc != 3) {
usage(PROGNAME(argc, argv));
goto out;
}
fin = open(argv[1], O_RDONLY);
if (fin < 0) {
perror("Cannot open bl31.bin");
goto out;
}
fout = open(argv[2], O_WRONLY | O_CREAT, 0660);
if (fout < 0) {
perror("Cannot open bl31.img");
goto closefin;
}
data = htole32(BL31_MAGIC);
if (fdwrite(fout, (uint8_t *)&data, sizeof(data)) < 0)
goto closefout;
lseek(fout, 8, SEEK_SET);
data = htole32(BL31_LOADADDR);
if (fdwrite(fout, (uint8_t *)&data, sizeof(data)) < 0)
goto closefout;
lseek(fout, 0x200, SEEK_SET);
while ((len = read(fin, buf, sizeof(buf))) > 0)
if (fdwrite(fout, buf, len) < 0)
goto closefout;
if (len < 0) {
perror("Cannot read bl31.bin");
goto closefout;
}
ret = 0;
closefout:
close(fout);
closefin:
close(fin);
out:
return ret;
}
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