From: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>
Date: Mon, 06 Oct 2014 11:06:27 -0500
> sparc64 defines COMMAND_LINE_SIZE to be 2048, but the boot string is
> hard-coded to be 256 bytes long.
>
> based on a patch by Bob Picco
>
> Signed-off-by: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>
I think we might be limited by the size of barg_out[] in the SILO
bootloader, which is 1024 bytes.
SILO massages the command line into barg_out[] then does:
if (architecture == sun4u)
kernel_params = (char *)((hdrs->bootstr_info_ptr_low - 0x400000) +
(image_base - 0x4000));
...
if (kernel_params) {
extern char barg_out[];
int len = *(unsigned int *)kernel_params;
strncpy (kernel_params + 8, barg_out, len);
kernel_params [8 + len - 1] = 0;
*(unsigned int *)(kernel_params + 4) = 1;
}
So it blindly copies however many bytes you tell it to in that
bootstr_info area :-/
So I'm happy to apply a patch that increases the size to 1024,
whilst adding a comment explaining the SILO limitation.
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