loader/libofw: Fix disk size truncation

At present OF_ioctl first multiplies, then casts to 64-bit, meaning at
the asm level it truncates the result to 32-bit, then zero-extends it to
64-bit to return.  Cast `n` to 64-bit before multiplying, so that the
correct result is returned.

This commit is contained in:

Justin Hibbits

2024-02-20 17:08:54 -05:00

parent f81cdf24ba

commit cd6e526e26

1 changed files with 1 additions and 1 deletions

									
										stand/libofw/ofw_disk.c
									
		+1
		-1
	
												View File
												
				@@ -174,7 +174,7 @@ ofwd_ioctl(struct open_file *f, u_long cmd, void *data)

					case DIOCGMEDIASIZE:

						block_size = OF_block_size(dev->d_handle);

						n = OF_blocks(dev->d_handle);

						*(uint64_t *)data = (uint64_t)(n * block_size);

						*(uint64_t *)data = ((uint64_t)n * block_size);

						break;

					default:

						return (ENOTTY);