blob: a2978e34ad33dff649a4bc89c0460b5aed0438ef [file] [log] [blame]
// Copyright 2006-2009 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// CPU specific code for arm independent of OS goes here.
#ifdef __arm__
#ifdef __QNXNTO__
#include <sys/mman.h> // for cache flushing.
#include <machine/sysarch.h> // for cache flushing
#include <sys/types.h>
#define __ARM_NR_cacheflush 0x0f0002
#include <sys/syscall.h> // for cache flushing.
#include "src/codegen/cpu-features.h"
namespace v8 {
namespace internal {
// The inlining of this seems to trigger an LTO bug that clobbers a register,
// see and
V8_NOINLINE void CpuFeatures::FlushICache(void* start, size_t size) {
#if !defined(USE_SIMULATOR)
#if V8_OS_QNX
msync(start, size, MS_SYNC | MS_INVALIDATE_ICACHE);
struct arm_sync_icache_args args = {
.addr = reinterpret_cast<uintptr_t>(start), .len = size};
sysarch(ARM_SYNC_ICACHE, reinterpret_cast<void*>(&args));
register uint32_t beg asm("r0") = reinterpret_cast<uint32_t>(start);
register uint32_t end asm("r1") = beg + size;
register uint32_t flg asm("r2") = 0;
asm volatile(
// This assembly works for both ARM and Thumb targets.
// Preserve r7; it is callee-saved, and GCC uses it as a frame pointer for
// Thumb targets.
" push {r7}\n"
// r0 = beg
// r1 = end
// r2 = flags (0)
" ldr r7, =%c[scno]\n" // r7 = syscall number
" svc 0\n"
" pop {r7}\n"
: "r"(beg), "r"(end), "r"(flg), [scno] "i"(__ARM_NR_cacheflush)
: "memory");
#endif // !USE_SIMULATOR
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_ARM