The legacy ATAGS format for passing information to the kernel only
allows RAM sizes which fit in 32 bits; enforce this restriction
rather than silently doing something weird.
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
hw/arm_boot.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/hw/arm_boot.c b/hw/arm_boot.c
index 29ae324..7366427 100644
--- a/hw/arm_boot.c
+++ b/hw/arm_boot.c
@@ -399,6 +399,11 @@ void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info
*info)
bootloader[5] = dtb_start;
} else {
bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR;
+ if (info->ram_size >= (1ULL << 32)) {
+ fprintf(stderr, "qemu: RAM size must be less than 4GB to boot"
+ " Linux kernel without device tree\n");
+ exit(1);
+ }
}
bootloader[6] = entry;
for (n = 0; n < sizeof(bootloader) / 4; n++) {
--
1.7.1
