_strap_gate.nx

buildroot/runtime/_hdl_build/_strap_gate.nx

4845 B89 linesdepth 2pulls 2 transitivereach 0 importersview sourcekind gate/proof

docs dependencies structs consts functions

about

_strap_gate.nx -- LOCK for S-MODE TRAP DELEGATION + sret (X-PAGE-STRAP-001). NO mocks. Proves the real-OS trap path: a U-mode ecall is DELEGATED (medeleg) to the S-MODE kernel handler (stvec), which handles it and returns with sret -- vs the default M-mode monitor. Drives nx_strap_emit: T1 delegated : medeleg=0x100 (ecall-from-U) -> trap to S-mode (stvec) -> "STRAP" -> sret -> U halts (reaching the finisher proves sret returned to U-mode) T2 control : medeleg=0 -> trap to M-mode (mtvec) -> "MTRAP", and STRAP never prints T1 vs T2 differ ONLY in medeleg -> proves the delegation is what routes the trap to S-mode. GREEN only if T1 && T2. Evidence -> knowledge/status/priv.log (STRAPGATE). license_tier: ORIGINAL

dependencies 1 imports · 0 importers

imports: nx_syscalls.nx

imported by: nobody (leaf or entry point)

call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown

structs

none

consts

11	const ST_EMIT: *u8 = "_offc/nx_strap_emit.elf"
12	const ST_SOV: *u8 = "_offc/nx_boot_run_sov.elf"

functions

14	func g_p(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 } called by 2: g_row main calls 1: sys_write
15	func g_fp(fd: i64, s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(fd,s,n); return 0 } called by 1: main calls 1: sys_write
16	func g_fn(fd: i64, v: i64) -> i64 { let bb: u8=sys_mmap(28); var m: i64=v; if m<0{m=0-m}; let t: u8=sys_mmap(28); var k: i64=0; if m==0{t[0]=48;k=1}; while m>0{t[k]=(48+(m%10)) as u8;m=m/10;k=k+1}; var i: i64=0; while i<k{bb[i]=t[k-1-i];i=i+1}; sys_write(fd,bb,k); return 0 } called by 1: main calls 2: sys_mmap sys_write
18	func g_run(prog: u8, a1: u8, a2: u8, outpath: u8) -> i64 called by 1: g_case calls 7: sys_fork sys_openat_wr sys_dup3 sys_mmap sys_execve sys_exit+1
37	func g_read(path: u8, buf: u8, cap: i64) -> i64 called by 1: g_case calls 3: sys_openat_rd sys_read sys_close
46	func g_has(buf: u8, n: i64, pat: u8, pl: i64) -> i64 called by 1: main
52	func g_case(medeleg: u8, binp: u8, txt: u8, buf: u8) -> i64 called by 1: main calls 2: g_run g_read
57	func g_row(name: u8, pass: i64) -> i64 { g_p(" " as u8); g_p(name); if pass==1 { g_p(" PASS\n" as u8) } else { g_p(" FAIL\n" as u8) } return 0 } called by 1: main calls 1: g_p
59	func main() -> i64 calls 11: sys_mmap g_case g_has g_p g_row sys_openat_append+5