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Subject[PATCH 1/2] remoteproc: bail out if firmware has different endianess
Date
At this point we don't support remote processors that have
a different endianess than the host.

Look out for these unsupported scenarios, and bail out if
encountered.

Reported-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Mark Grosen <mgrosen@ti.com>
---
drivers/remoteproc/remoteproc_core.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 6212b82..567a3c5 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -39,6 +39,7 @@
#include <linux/elf.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_ring.h>
+#include <asm/byteorder.h>

#include "remoteproc_internal.h"

@@ -851,6 +852,16 @@ static int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)

ehdr = (struct elf32_hdr *)fw->data;

+ /* We assume the firmware has the same endianess as the host */
+# ifdef __LITTLE_ENDIAN
+ if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) {
+# else /* BIG ENDIAN */
+ if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB) {
+# endif
+ dev_err(dev, "Unsupported firmware endianess\n");
+ return -EINVAL;
+ }
+
if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) {
dev_err(dev, "Image is too small\n");
return -EINVAL;
--
1.7.5.4


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