diff options
Diffstat (limited to 'JavaScriptCore/assembler/ARMAssembler.h')
| -rw-r--r-- | JavaScriptCore/assembler/ARMAssembler.h | 49 |
1 files changed, 34 insertions, 15 deletions
diff --git a/JavaScriptCore/assembler/ARMAssembler.h b/JavaScriptCore/assembler/ARMAssembler.h index 712473e..6967b37 100644 --- a/JavaScriptCore/assembler/ARMAssembler.h +++ b/JavaScriptCore/assembler/ARMAssembler.h @@ -29,7 +29,7 @@ #include <wtf/Platform.h> -#if ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL) +#if ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL) #include "AssemblerBufferWithConstantPool.h" #include <wtf/Assertions.h> @@ -138,11 +138,11 @@ namespace JSC { FSITOD = 0x0eb80bc0, FTOSID = 0x0ebd0b40, FMSTAT = 0x0ef1fa10, -#if ARM_ARCH_VERSION >= 5 +#if WTF_ARM_ARCH_AT_LEAST(5) CLZ = 0x016f0f10, BKPT = 0xe120070, #endif -#if ARM_ARCH_VERSION >= 7 +#if WTF_ARM_ARCH_AT_LEAST(7) MOVW = 0x03000000, MOVT = 0x03400000, #endif @@ -183,6 +183,7 @@ namespace JSC { }; static const ARMWord INVALID_IMM = 0xf0000000; + static const int DefaultPrefetching = 2; class JmpSrc { friend class ARMAssembler; @@ -342,7 +343,7 @@ namespace JSC { emitInst(static_cast<ARMWord>(cc) | MOV, rd, ARMRegisters::r0, op2); } -#if ARM_ARCH_VERSION >= 7 +#if WTF_ARM_ARCH_AT_LEAST(7) void movw_r(int rd, ARMWord op2, Condition cc = AL) { ASSERT((op2 | 0xf0fff) == 0xf0fff); @@ -530,7 +531,7 @@ namespace JSC { m_buffer.putInt(static_cast<ARMWord>(cc) | FMSTAT); } -#if ARM_ARCH_VERSION >= 5 +#if WTF_ARM_ARCH_AT_LEAST(5) void clz_r(int rd, int rm, Condition cc = AL) { m_buffer.putInt(static_cast<ARMWord>(cc) | CLZ | RD(rd) | RM(rm)); @@ -539,7 +540,7 @@ namespace JSC { void bkpt(ARMWord value) { -#if ARM_ARCH_VERSION >= 5 +#if WTF_ARM_ARCH_AT_LEAST(5) m_buffer.putInt(BKPT | ((value & 0xff0) << 4) | (value & 0xf)); #else // Cannot access to Zero memory address @@ -632,15 +633,32 @@ namespace JSC { // Patching helpers - static ARMWord* getLdrImmAddress(ARMWord* insn, uint32_t* constPool = 0); - static void linkBranch(void* code, JmpSrc from, void* to, int useConstantPool = 0); + static ARMWord* getLdrImmAddress(ARMWord* insn) + { + // Must be an ldr ..., [pc +/- imm] + ASSERT((*insn & 0x0f7f0000) == 0x051f0000); + + ARMWord addr = reinterpret_cast<ARMWord>(insn) + DefaultPrefetching * sizeof(ARMWord); + if (*insn & DT_UP) + return reinterpret_cast<ARMWord*>(addr + (*insn & SDT_OFFSET_MASK)); + return reinterpret_cast<ARMWord*>(addr - (*insn & SDT_OFFSET_MASK)); + } + + static ARMWord* getLdrImmAddressOnPool(ARMWord* insn, uint32_t* constPool) + { + // Must be an ldr ..., [pc +/- imm] + ASSERT((*insn & 0x0f7f0000) == 0x051f0000); + + if (*insn & 0x1) + return reinterpret_cast<ARMWord*>(constPool + ((*insn & SDT_OFFSET_MASK) >> 1)); + return getLdrImmAddress(insn); + } static void patchPointerInternal(intptr_t from, void* to) { ARMWord* insn = reinterpret_cast<ARMWord*>(from); ARMWord* addr = getLdrImmAddress(insn); *addr = reinterpret_cast<ARMWord>(to); - ExecutableAllocator::cacheFlush(addr, sizeof(ARMWord)); } static ARMWord patchConstantPoolLoad(ARMWord load, ARMWord value) @@ -685,12 +703,13 @@ namespace JSC { void linkJump(JmpSrc from, JmpDst to) { ARMWord* insn = reinterpret_cast<ARMWord*>(m_buffer.data()) + (from.m_offset / sizeof(ARMWord)); - *getLdrImmAddress(insn, m_buffer.poolAddress()) = static_cast<ARMWord>(to.m_offset); + ARMWord* addr = getLdrImmAddressOnPool(insn, m_buffer.poolAddress()); + *addr = static_cast<ARMWord>(to.m_offset); } static void linkJump(void* code, JmpSrc from, void* to) { - linkBranch(code, from, to); + patchPointerInternal(reinterpret_cast<intptr_t>(code) + from.m_offset, to); } static void relinkJump(void* from, void* to) @@ -700,12 +719,12 @@ namespace JSC { static void linkCall(void* code, JmpSrc from, void* to) { - linkBranch(code, from, to, true); + patchPointerInternal(reinterpret_cast<intptr_t>(code) + from.m_offset, to); } static void relinkCall(void* from, void* to) { - relinkJump(from, to); + patchPointerInternal(reinterpret_cast<intptr_t>(from) - sizeof(ARMWord), to); } // Address operations @@ -747,7 +766,7 @@ namespace JSC { static ARMWord getOp2(ARMWord imm); -#if ARM_ARCH_VERSION >= 7 +#if WTF_ARM_ARCH_AT_LEAST(7) static ARMWord getImm16Op2(ARMWord imm) { if (imm <= 0xffff) @@ -812,6 +831,6 @@ namespace JSC { } // namespace JSC -#endif // ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL) +#endif // ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL) #endif // ARMAssembler_h |