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tools: kwbimage: Align BIN header executable code to 128-bit boundary

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ARM executable code inside the BIN header on some mvebu platforms
(e.g. A370, AXP) must always be aligned with the 128-bit boundary. This
requirement can be met by inserting dummy arguments into BIN header.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2021-10-21 16:46:07 +02:00 committed by Stefan Roese
parent a85a71d396
commit e58f08b479
1 changed files with 34 additions and 17 deletions
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51
tools/kwbimage.c
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@ -932,6 +932,12 @@ static size_t image_headersz_v1(int *hasext)
*/ */
headersz = sizeof(struct main_hdr_v1); headersz = sizeof(struct main_hdr_v1);
if (image_get_csk_index() >= 0) {
headersz += sizeof(struct secure_hdr_v1);
if (hasext)
*hasext = 1;
}
count = image_count_options(IMAGE_CFG_DATA); count = image_count_options(IMAGE_CFG_DATA);
if (count > 0) if (count > 0)
headersz += sizeof(struct register_set_hdr_v1) + 8 * count + 4; headersz += sizeof(struct register_set_hdr_v1) + 8 * count + 4;
@ -963,15 +969,10 @@ static size_t image_headersz_v1(int *hasext)
return 0; return 0;
} }
headersz += sizeof(struct opt_hdr_v1) + headersz += sizeof(struct opt_hdr_v1) + sizeof(uint32_t) +
ALIGN(s.st_size, 4) + (binarye->binary.nargs) * sizeof(uint32_t);
(binarye->binary.nargs + 2) * sizeof(uint32_t); headersz = ALIGN(headersz, 16);
if (hasext) headersz += ALIGN(s.st_size, 4) + sizeof(uint32_t);
*hasext = 1;
}
if (image_get_csk_index() >= 0) {
headersz += sizeof(struct secure_hdr_v1);
if (hasext) if (hasext)
*hasext = 1; *hasext = 1;
} }
@ -984,9 +985,12 @@ static size_t image_headersz_v1(int *hasext)
} }
int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext, int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
struct image_cfg_element *binarye) struct image_cfg_element *binarye,
struct main_hdr_v1 *main_hdr)
{ {
struct opt_hdr_v1 *hdr = (struct opt_hdr_v1 *)*cur; struct opt_hdr_v1 *hdr = (struct opt_hdr_v1 *)*cur;
uint32_t add_args;
uint32_t offset;
uint32_t *args; uint32_t *args;
size_t binhdrsz; size_t binhdrsz;
struct stat s; struct stat s;
@ -1009,12 +1013,6 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
goto err_close; goto err_close;
} }
binhdrsz = sizeof(struct opt_hdr_v1) +
(binarye->binary.nargs + 2) * sizeof(uint32_t) +
ALIGN(s.st_size, 4);
hdr->headersz_lsb = cpu_to_le16(binhdrsz & 0xFFFF);
hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;
*cur += sizeof(struct opt_hdr_v1); *cur += sizeof(struct opt_hdr_v1);
args = (uint32_t *)*cur; args = (uint32_t *)*cur;
@ -1025,6 +1023,19 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
*cur += (binarye->binary.nargs + 1) * sizeof(uint32_t); *cur += (binarye->binary.nargs + 1) * sizeof(uint32_t);
/*
* ARM executable code inside the BIN header on some mvebu platforms
* (e.g. A370, AXP) must always be aligned with the 128-bit boundary.
* This requirement can be met by inserting dummy arguments into
* BIN header, if needed.
*/
offset = *cur - (uint8_t *)main_hdr;
add_args = ((16 - offset % 16) % 16) / sizeof(uint32_t);
if (add_args) {
*(args - 1) = cpu_to_le32(binarye->binary.nargs + add_args);
*cur += add_args * sizeof(uint32_t);
}
ret = fread(*cur, s.st_size, 1, bin); ret = fread(*cur, s.st_size, 1, bin);
if (ret != 1) { if (ret != 1) {
fprintf(stderr, fprintf(stderr,
@ -1043,6 +1054,12 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
*cur += sizeof(uint32_t); *cur += sizeof(uint32_t);
binhdrsz = sizeof(struct opt_hdr_v1) +
(binarye->binary.nargs + add_args + 2) * sizeof(uint32_t) +
ALIGN(s.st_size, 4);
hdr->headersz_lsb = cpu_to_le16(binhdrsz & 0xFFFF);
hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;
return 0; return 0;
err_close: err_close:
@ -1299,7 +1316,7 @@ static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
if (e->type != IMAGE_CFG_BINARY) if (e->type != IMAGE_CFG_BINARY)
continue; continue;
if (add_binary_header_v1(&cur, &next_ext, e)) if (add_binary_header_v1(&cur, &next_ext, e, main_hdr))
return NULL; return NULL;
} }