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hw/arm_boot.c: Check for RAM sizes exceeding ATAGS capacity

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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.maydell@linaro.org>
Reviewed-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
This commit is contained in:
Peter Maydell 2012-07-20 13:34:50 +01:00
parent 0b94438480
commit 3871481c0a
1 changed files with 6 additions and 0 deletions
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6
hw/arm_boot.c
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@ -399,6 +399,12 @@ 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 using ATAGS (try passing a device tree"
" using -dtb)\n");
exit(1);
}
}
bootloader[6] = entry;
for (n = 0; n < sizeof(bootloader) / 4; n++) {