petrbalvin/gasm-sdk
0
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 36 Wiki Activity

fix(verify): fix non-amd64 JIT trampolines and validate under qemu

Browse Source
This commit is contained in:
petrbalvin
2026-08-31 12:34:50 +02:00
parent a5a59d6503
commit 94c4756d47
10 changed files with 77 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/gasm/main.go
+13 -8
View File
@@ -1049,8 +1049,11 @@ With -smoke, each NOSPLIT function is called with a zeroed argument block to
confirm the JIT trampoline works end-to-end. This is safe only for functions
that tolerate nil pointers and zero lengths in their arguments.
With -abi, each function is called with sentinel values in the callee-saved
registers (BP, R14) and a red-zone canary below SP; violations are reported.
With -abi, each function is called with sentinel values in the registers
the Go ABI fixes across calls (the frame pointer and the goroutine
pointer) plus a canary below SP; violations are reported. JIT-based
checks run when the host matches the file's architecture (all but
loong64, which is ground-truth only for now).
With -fuzz, each function with a // func signature is differentially fuzzed
against the go-tool-asm version in a subprocess (so a crash on a partial
@@ -1091,17 +1094,19 @@ each entry reproduces.
}
path := set.Arg(0)
targetArch := arch.FromFilename(path)
// JIT execution is enabled for amd64 kernels on amd64 hosts. The
// non-amd64 execution trampolines are implemented but not yet
// runtime-hardened, so other kernels take the toolchain-comparison
// path, which needs no execution.
if targetArch != arch.AMD64 || hostArch() != arch.AMD64 {
// JIT execution runs when the host CPU matches the kernel's
// architecture, except loong64: its trampoline is implemented but not
// yet validated against real hardware (the Go runtime cannot start
// under the available loong64 emulators), so those kernels take the
// toolchain-comparison path.
if targetArch != hostArch() || targetArch == arch.LOONG64 {
switch targetArch {
case arch.RISCV:
// RISC-V: ground-truth only (no JIT on non-RISC-V hosts).
return cmdVerifyRISCV(path, *groundTruth, *profile)
case arch.LOONG64:
// LoongArch: ground-truth only (no JIT on non-LoongArch hosts).
// LoongArch: ground-truth only (trampoline not yet
// hardware-validated).
return cmdVerifyLOONG64(path, *groundTruth, *profile)
case arch.ARM64:
// AArch64: ground-truth only (no JIT on non-ARM64 hosts).