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feat(adapter): higher-half kernel (linked at PHYS_OFFSET, boot trampoline, no low mappings), fix SBI ecall clobbers

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This commit is contained in:
Gabriel Kaszewski
2026-10-27 00:25:20 +01:00
parent 55758ae5b2
commit b87a62475f
20 changed files with 208 additions and 143 deletions
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6
crates/adapter-riscv/src/devices/mod.rs
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@@ -82,10 +82,10 @@ pub(crate) fn info_page(uart: &Uart, pid: ProcessId, va: usize, words: &[u64]) {
let pa = kern()
.user_page_frame(pid, va)
.unwrap_or_else(|| crate::halt(uart, "info page vanished"));
let info = pa.raw() as *mut u64;
let info = crate::mmu::phys_to_virt(pa.raw()) as *mut u64;
for (i, &w) in words.iter().enumerate() {
// SAFETY: `pa` is a pool frame just mapped for `pid`, identity
// mapped in kernel space, and `words` fits in one page.
// SAFETY: `pa` is a pool frame just mapped for `pid`, reachable at
// `phys_to_virt`, and `words` fits in one page.
unsafe { core::ptr::write_volatile(info.add(i), w) };
}
}