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feat(boot): the loader tells the kernel its boot disk; system=v3 is refused on a stick

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uefi.h: the UEFI device path and Block I/O protocols, a typed LocateDevicePath, and BootDisk
{gpt, is_stick, disk_guid[16]} appended to BootInfo after args (boot_info_offsets.h unchanged).
The loader, before ExitBootServices, cuts its image's device path at the partition's HardDrive
node, locates the whole disk's Block I/O (whole path consumed, not a logical partition, 512-byte
blocks), reads it as 1 KiB blocks through a loader-side blkio adapter, and runs the kernel's own
gpt_read: is it a StarshipOS stick (identity and Artemis partitions), and its DiskGUID
(gpt_disk_guid, new). No HardDrive node (an ISO/CD boot), no GPT, or any failure: not a stick.
Monolithic builds only (the non-monolithic loader does not link gpt.c, and does not build today:
kernel/src/vm/vm_core.c -- reported, not fixed).

The kernel prints 'Boot disk: a StarshipOS stick' or '... not a StarshipOS stick', and on a stick
system=v3 gives 'System: v3 is not on this stick -- StarForth v4' and boots v4.

Tests: stick_v3 (new), stick_boot and zuse x3 failed on the new lines before, pass after; v3_keys
still boots v3 off a stick. Acceptance: amd64, aarch64, riscv64 to [zuse@Hera] ok>, POST 538/538,
dict_hash 0xfec8c47cfc6f437f; v4 suite and test-32 0 failures.

Plan: docs/v4.0.0/plans/2026-10-27-stick-4-one-disk.md, Task 3.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-28 12:08:48 -04:00
co-authored by Claude Opus 5.5
parent a321c537f7
commit 1b45f5f85f
34 changed files with 20202 additions and 5 deletions
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kernel/src/gpt.c
+7
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@@ -50,6 +50,7 @@ static uint64_t le64(const uint8_t *p) { return (uint64_t)le32(p) | (uint64_t)le
static uint8_t g_gpt_hdr_block[BLKIO_FORTH_BLOCK_SIZE];
static uint8_t g_gpt_entries[GPT_ENTRIES_MAX];
static uint8_t g_gpt_disk_guid[16]; /* the DiskGUID of the last gpt_read that gave GPT_OK */
int gpt_read(blkio_dev_t *disk, gpt_part_t *parts, unsigned max, unsigned *count)
{
@@ -123,9 +124,15 @@ int gpt_read(blkio_dev_t *disk, gpt_part_t *parts, unsigned max, unsigned *count
n++;
}
*count = n;
memcpy(g_gpt_disk_guid, h + 56, 16);
return GPT_OK;
}
void gpt_disk_guid(uint8_t guid[16])
{
memcpy(guid, g_gpt_disk_guid, 16);
}
int gpt_find(const gpt_part_t *parts, unsigned count, const uint8_t type[16])
{
unsigned i;