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boot: the /system tree is the system image — loader-built ramdisk, spawn by path

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Retire the build-time ramdisk packer and the packed initial-ramdisk.img.
make-fat-image.py now lays every user binary out at its FHS path on the
boot volume (system/services, system/drivers, system/tests), and the EFI
loader walks \system at boot, packing what it finds into an in-RAM v2
initial_ramdisk whose entry names are full FHS paths. init rides the
table like every other binary: its dedicated handoff fields are gone and
the kernel spawns PID 1 via the same lookup as everyone else
(process.spawnBundled).

system_spawn resolves names by exact path first, then unique basename,
and normalizes argv[0] to the stored path — so task names (and, next,
the tagged log ring's attribution) are honest binary paths everywhere.
initrd v2 rejects the old magic so a stale image fails loudly.

Groundwork for per-process logging (/var/log/<boot-stamp>/<binary-path>.log)
and the kernel-VFS /system mount.
This commit is contained in:
Daniel Samson
2026-07-21 14:47:26 +01:00
parent ec6e888076
commit 2d0858caf6
11 changed files with 413 additions and 324 deletions
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system/services/process-test/process-test.zig
+4 -4
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@@ -147,8 +147,8 @@ pub fn main(init: runtime.process.Init) void {
const spinner = runtime.system.spawnSupervised("process-test", &.{"spinner"}, endpoint) orelse fail("spawn spinner");
runtime.system.sleep(100); // let the sleeper block and the spinner get a core
if (!listed(sleeper, "process-test")) fail("sleeper not in process_enumerate");
if (!listed(spinner, "process-test")) fail("spinner not in process_enumerate");
if (!listed(sleeper, "/system/tests/process-test")) fail("sleeper not in process_enumerate");
if (!listed(spinner, "/system/tests/process-test")) fail("spinner not in process_enumerate");
// Kills that must be refused: a kernel task (id 0), and an id that was never
// issued — both -ESRCH. (-EPERM needs a second supervisor; the kernel-level
@@ -167,8 +167,8 @@ pub fn main(init: runtime.process.Init) void {
if (!runtime.system.kill(spinner)) fail("kill spinner");
if (awaitChildExit(endpoint) != spinner) fail("spinner exit notification");
if (listed(sleeper, "process-test")) fail("sleeper still listed after kill");
if (listed(spinner, "process-test")) fail("spinner still listed after kill");
if (listed(sleeper, "/system/tests/process-test")) fail("sleeper still listed after kill");
if (listed(spinner, "/system/tests/process-test")) fail("spinner still listed after kill");
// M17.2: both children were killed by us, and the reason says so — the whole
// restart-policy input, read through the runtime like a real supervisor would.