From 3c7aab23a42264012d82937dd2a57e33ee288a92 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 15 Aug 2015 14:37:51 -0600 Subject: x86: ifdtool: Check that U-Boot does not overlap other regions Since U-Boot and its device tree can grow we should check that it does not overlap the regions above it. Track the ROM offset that U-Boot reaches and check that other regions (written after U-Boot) do not interfere. Signed-off-by: Simon Glass Reviewed-by: Bin Meng Tested-by: Bin Meng --- tools/ifdtool.c | 33 ++++++++++++++++++++++----------- 1 file changed, 22 insertions(+), 11 deletions(-) (limited to 'tools') diff --git a/tools/ifdtool.c b/tools/ifdtool.c index df166161f4..510a99cd64 100644 --- a/tools/ifdtool.c +++ b/tools/ifdtool.c @@ -706,10 +706,11 @@ int inject_region(char *image, int size, int region_type, char *region_fname) * 0xffffffff so use an address relative to that. For an * 8MB ROM the start address is 0xfff80000. * @write_fname: Filename to add to the image + * @offset_uboot_top: Offset of the top of U-Boot * @return number of bytes written if OK, -ve on error */ static int write_data(char *image, int size, unsigned int addr, - const char *write_fname) + const char *write_fname, int offset_uboot_top) { int write_fd, write_size; int offset; @@ -719,6 +720,14 @@ static int write_data(char *image, int size, unsigned int addr, return write_fd; offset = (uint32_t)(addr + size); + if (offset_uboot_top && offset_uboot_top >= offset) { + fprintf(stderr, "U-Boot image overlaps with region '%s'\n", + write_fname); + fprintf(stderr, + "U-Boot finishes at offset %x, file starts at %x\n", + offset_uboot_top, offset); + return -EXDEV; + } debug("Writing %s to offset %#x\n", write_fname, offset); if (offset < 0 || offset + write_size > size) { @@ -756,24 +765,23 @@ static int write_uboot(char *image, int size, struct input_file *uboot, { const void *blob; const char *data; - int uboot_size; + int uboot_size, fdt_size; uint32_t *ptr; int data_size; int offset; int node; - int ret; - uboot_size = write_data(image, size, uboot->addr, uboot->fname); + uboot_size = write_data(image, size, uboot->addr, uboot->fname, 0); if (uboot_size < 0) return uboot_size; fdt->addr = uboot->addr + uboot_size; debug("U-Boot size %#x, FDT at %#x\n", uboot_size, fdt->addr); - ret = write_data(image, size, fdt->addr, fdt->fname); - if (ret < 0) - return ret; + fdt_size = write_data(image, size, fdt->addr, fdt->fname, 0); + if (fdt_size < 0) + return fdt_size; + blob = (void *)image + (uint32_t)(fdt->addr + size); if (ucode_ptr) { - blob = (void *)image + (uint32_t)(fdt->addr + size); debug("DTB at %lx\n", (char *)blob - image); node = fdt_node_offset_by_compatible(blob, 0, "intel,microcode"); @@ -796,7 +804,7 @@ static int write_uboot(char *image, int size, struct input_file *uboot, ucode_ptr, ptr[0], ptr[1]); } - return 0; + return ((char *)blob + fdt_size) - image; } static void print_version(void) @@ -1113,12 +1121,14 @@ int main(int argc, char *argv[]) } if (mode_write_descriptor) - ret = write_data(image, size, -size, desc_fname); + ret = write_data(image, size, -size, desc_fname, 0); if (mode_inject) ret = inject_region(image, size, region_type, inject_fname); if (mode_write) { + int offset_uboot_top = 0; + for (wr_idx = 0; wr_idx < wr_num; wr_idx++) { ifile = &input_file[wr_idx]; if (ifile->type == IF_fdt) { @@ -1126,9 +1136,10 @@ int main(int argc, char *argv[]) } else if (ifile->type == IF_uboot) { ret = write_uboot(image, size, ifile, fdt, ucode_ptr); + offset_uboot_top = ret; } else { ret = write_data(image, size, ifile->addr, - ifile->fname); + ifile->fname, offset_uboot_top); } if (ret < 0) break; -- cgit v1.2.1