feat(verify): ABI checks on arm64, riscv64 and loong64

Assisted-by: GLM 5.3 Flash

verify/abi_amd64.go

@@ -5,17 +5,6 @@
 
 package verify
 
-import (
-	"encoding/binary"
-	"fmt"
-	"syscall"
-	"unsafe"
-)
-
-// abiResult records register-clobber violations detected by the ABI-checking
-// trampoline.  Bit 0: BP clobbered.  Bit 1: R14 clobbered.
-var abiResult uint64
-
 // savedBP holds the caller's frame pointer across the ABI-checked JIT call.
 // Written and read by enterJITChecked/leaveJITChecked (abi_amd64.s); no Go
 // code references it, which GoLand cannot see inside assembly.
@@ -50,93 +39,3 @@ func enterJITChecked(fn uintptr, stack uintptr)
 //lint:ignore U1000 the assembly obtains this address through leaveCheckedPtr
 //go:nosplit
 func leaveJITCheckedRaw()
-
-// ABIReport describes the result of an ABI-checking call.
-type ABIReport struct {
-	BPClobbered  bool // BP was modified by the function
-	R14Clobbered bool // R14 (goroutine pointer) was modified
-	RedZoneHit   bool // the 128-byte red zone below SP was written
-}
-
-// OK returns true when no violations were detected.
-func (r ABIReport) OK() bool {
-	return !r.BPClobbered && !r.R14Clobbered && !r.RedZoneHit
-}
-
-// String returns a human-readable summary.
-func (r ABIReport) String() string {
-	if r.OK() {
-		return "ABI clean"
-	}
-	s := "ABI violation:"
-	if r.BPClobbered {
-		s += " BP clobbered"
-	}
-	if r.R14Clobbered {
-		s += " R14 clobbered"
-	}
-	if r.RedZoneHit {
-		s += " red-zone written"
-	}
-	return s
-}
-
-// redZoneSize is the System V AMD64 red zone: 128 bytes below SP that a
-// leaf function may use without adjusting SP.  Go does not use the red zone,
-// so any write there is a bug.
-const redZoneSize = 128
-
-// redZoneFill is the byte pattern used to detect red-zone writes.
-const redZoneFill = 0xA5
-
-// CallChecked invokes the function at fnAddr with ABI sentinels and a
-// red-zone canary, returning both the argument block (with results) and an
-// ABIReport.
-func CallChecked(fnAddr uintptr, args []byte) ([]byte, ABIReport, error) {
-	report := ABIReport{}
-
-	// Reset the global result.
-	abiResult = 0
-
-	// Prepare the stack: [red-zone canary][padding][leaveJITCheckedRaw][args...]
-	// The red zone sits below the initial SP, so the function would have to
-	// write below SP to corrupt it.
-	totalSize := redZoneSize + stackPad + 8 + len(args) + 64
-	stackMem, err := syscall.Mmap(-1, 0, totalSize,
-		syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_PRIVATE|syscall.MAP_ANON)
-	if err != nil {
-		return nil, report, fmt.Errorf("verify: stack mmap: %w", err)
-	}
-	defer func() { _ = syscall.Munmap(stackMem) }()
-
-	// Fill the red zone with the canary pattern.
-	for i := range redZoneSize {
-		stackMem[i] = redZoneFill
-	}
-
-	// Return address and args after the red zone and padding.
-	retOff := redZoneSize + stackPad
-	binary.LittleEndian.PutUint64(stackMem[retOff:retOff+8], uint64(leaveCheckedPtr))
-	copy(stackMem[retOff+8:], args)
-
-	stackBase := uintptr(unsafe.Pointer(&stackMem[retOff]))
-	enterJITChecked(fnAddr, stackBase)
-
-	// Read the register-clobber result.
-	res := abiResult
-	report.BPClobbered = res&1 != 0
-	report.R14Clobbered = res&2 != 0
-
-	// Check the red zone.
-	for i := range redZoneSize {
-		if stackMem[i] != redZoneFill {
-			report.RedZoneHit = true
-			break
-		}
-	}
-
-	// Copy out the argument area.
-	out := make([]byte, len(args))
-	copy(out, stackMem[retOff+8:retOff+8+len(args)])
-	return out, report, nil
-}