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feat(v4.0.0): the block words are the kernel's -- v3's way in full

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Ruled 2026-10-07.  BLOCK, BUFFER, UPDATE, SAVE-BUFFERS and EMPTY-BUFFERS
are each one kernel request on port 0, by block number only.  The node
has a window of four slots in its memory, as a v3 VM has; the kernel
copies blocks into it, keeps the record of which block is in which slot,
and decides when a block is written (v4/system/blocks.c).  The node keeps
no record and gives the kernel no address, so a request cannot overwrite
the node's code.  When a block is written stays FORTH-79's: UPDATE marks
it.  When the chain of devices changes the slots are let go, as in v3.

The window is 512 cells more than the two buffers were; the dictionary
space ends that much lower, at 13824.

MESH.md 8.5 had said, from the review, that a v3 VM's BLOCK is the
kernel's buffer.  It is not, and the section now says what was reported,
what v3 does, and what was ruled.

make -C v4 test, sanitize and hosted-check pass; amd64, aarch64 and
riscv64 boot, POST 538 of 538, the same hashes on all six:
logs/20261007-092835, -093112, -093456.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-07 09:37:30 -04:00
co-authored by Claude Opus 5.5
parent 7f4d946d2e
commit 9bfd5071d2
21 changed files with 991 additions and 330 deletions
Download Patch File Download Diff File Expand all files Collapse all files
v4/tools/mkimage.c
+3 -3
View File
@@ -88,7 +88,7 @@ int main(int argc, char **argv)
n.mem[NODE_ERROR] = 0;
n.mem[BLK] = 0; n.mem[SCR] = 0; n.mem[SRC] = TIB; n.mem[SRC_HOOK] = 0;
for (k = BVARS; k < BVARS + 6; k++) n.mem[k] = 0;
for (k = BUF0_W; k < BUF0_W + 2 * 256; k++) n.mem[k] = 0;
for (k = BUF0_W; k < BUF0_W + (v4_cell)(V4_BLOCK_SLOTS * V4_BLOCK_CELLS); k++) n.mem[k] = 0;
for (k = TIB_W; k < TIB_W + 260; k++) n.mem[k] = 0;
for (k = WBUF_W; k < WBUF_W + WBUF_CELLS; k++) n.mem[k] = 0;
for (k = PAD_W; k < PAD_W + 21; k++) n.mem[k] = 0;
@@ -113,9 +113,9 @@ int main(int argc, char **argv)
fprintf(out, "const v4_image v4_capsule_image = {\n %uu, %uu, %uu, %uu,\n",
(unsigned)V4_CELL_BITS, (unsigned)V4_NODE_WORDS, (unsigned)V4_DATA_RING, (unsigned)V4_RET_RING);
fprintf(out, " %ld,\n %ld, %ld,\n %ld, %ld,\n", (long)idle, (long)faults, (long)PORT, (long)w_key, (long)w_key_end);
fprintf(out, " %ld, %ld, %ld,\n %ld, %ld,\n %ld,\n %ld, %ld,\n %ld, %ld\n};\n", (long)CONSOLE_TX, (long)CONSOLE_RX, (long)CONSOLE_ST,
fprintf(out, " %ld, %ld, %ld,\n %ld, %ld,\n %ld,\n %ld, %ld,\n %ld, %ld,\n %ld\n};\n", (long)CONSOLE_TX, (long)CONSOLE_RX, (long)CONSOLE_ST,
(long)DSTACK_REG, (long)RSTACK_REG, (long)NODE_ERROR, (long)DP, (long)LATEST,
(long)BOOT_CELLS, (long)FENCE);
(long)BOOT_CELLS, (long)FENCE, (long)BUF0_W);
if (fclose(out) != 0) die("cannot write", argv[1]);
fprintf(stderr, "mkimage: a capsule of %u words, dictionary to word %ld, %d-bit cells -> %s, %s\n", count, (long)((n.mem[DP] + 3) / 4), V4_CELL_BITS, argv[2], argv[1]);
return 0;