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https://github.com/geode-sdk/geode.git
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141 lines
No EOL
3.6 KiB
C++
141 lines
No EOL
3.6 KiB
C++
#include "platform_macro.h"
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#if defined(TARGET_ARCH_X64)
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#include "dobby_internal.h"
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#include "core/modules/assembler/assembler-x64.h"
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#include "TrampolineBridge/ClosureTrampolineBridge/common-bridge-handler.h"
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using namespace zz;
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using namespace zz::x64;
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static void *closure_bridge = NULL;
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void *get_closure_bridge() {
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// if already initialized, just return.
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if (closure_bridge)
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return closure_bridge;
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// Check if enable the inline-assembly closure_bridge_template
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#if ENABLE_CLOSURE_BRIDGE_TEMPLATE
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extern void closure_bridge_tempate();
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closure_bridge = closure_bridge_template;
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#else
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// otherwise, use the Assembler build the closure_bridge
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#define _ turbo_assembler_.
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#define __ turbo_assembler_.GetCodeBuffer()->
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char *pushfq = (char *)"\x9c";
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char *popfq = (char *)"\x9d";
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TurboAssembler turbo_assembler_(0);
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// save flags register
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__ EmitBuffer(pushfq, 1);
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// align rsp 16-byte
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_ sub(rsp, Immediate(8, 32));
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// general register
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_ sub(rsp, Immediate(16 * 8, 32));
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_ mov(Address(rsp, 8 * 0), rax);
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_ mov(Address(rsp, 8 * 1), rbx);
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_ mov(Address(rsp, 8 * 2), rcx);
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_ mov(Address(rsp, 8 * 3), rdx);
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_ mov(Address(rsp, 8 * 4), rbp);
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_ mov(Address(rsp, 8 * 5), rsp);
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_ mov(Address(rsp, 8 * 6), rdi);
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_ mov(Address(rsp, 8 * 7), rsi);
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_ mov(Address(rsp, 8 * 8), r8);
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_ mov(Address(rsp, 8 * 9), r9);
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_ mov(Address(rsp, 8 * 10), r10);
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_ mov(Address(rsp, 8 * 11), r11);
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_ mov(Address(rsp, 8 * 12), r12);
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_ mov(Address(rsp, 8 * 13), r13);
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_ mov(Address(rsp, 8 * 14), r14);
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_ mov(Address(rsp, 8 * 15), r15);
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// save origin sp
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_ mov(rax, rsp);
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_ add(rax, Immediate(8 + 8 + 8 + 16 * 8, 32));
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_ sub(rsp, Immediate(2 * 8, 32));
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_ mov(Address(rsp, 8), rax);
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// ======= Jump to UnifiedInterface Bridge Handle =======
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// prepare args
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// @rdi: data_address
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// @rsi: RegisterContext stack address
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_ mov(rdi, rsp);
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_ mov(rsi, Address(rsp, 8 + 8 + 16 * 8 + 2 * 8));
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// [!!!] As we can't detect the sp is aligned or not, check if need stack align
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{
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// mov rax, rsp
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__ EmitBuffer((void *)"\x48\x89\xE0", 3);
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// and rax, 0xF
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__ EmitBuffer((void *)"\x48\x83\xE0\x0F", 4);
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// cmp rax, 0x0
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__ EmitBuffer((void *)"\x48\x83\xF8\x00", 4);
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// jnz [stack_align_call_bridge]
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__ EmitBuffer((void *)"\x75\x15", 2);
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}
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// LABEL: call_bridge
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_ CallFunction(ExternalReference((void *)intercept_routing_common_bridge_handler));
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// jmp [restore_stack_register]
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__ EmitBuffer((void *)"\xE9\x12\x00\x00\x00", 5);
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// LABEL: stack_align_call_bridge
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// push rax
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__ EmitBuffer((void *)"\x50", 1);
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_ CallFunction(ExternalReference((void *)intercept_routing_common_bridge_handler));
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// pop rax
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__ EmitBuffer((void *)"\x58", 1);
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// ======= RegisterContext Restore =======
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// restore sp placeholder stack
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_ add(rsp, Immediate(2 * 8, 32));
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// general register
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_ pop(rax);
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_ pop(rbx);
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_ pop(rcx);
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_ pop(rdx);
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_ pop(rbp);
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_ add(rsp, Immediate(8, 32)); // => pop rsp
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_ pop(rdi);
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_ pop(rsi);
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_ pop(r8);
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_ pop(r9);
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_ pop(r10);
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_ pop(r11);
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_ pop(r12);
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_ pop(r13);
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_ pop(r14);
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_ pop(r15);
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// align rsp 16-byte
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_ add(rsp, Immediate(8, 32));
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// restore flags register
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__ EmitBuffer(popfq, 1);
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// trick: use the 'carry_data' stack(remain at closure trampoline) placeholder, as the return address
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_ ret();
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_ RelocBind();
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AssemblyCodeChunk *code = AssemblyCodeBuilder::FinalizeFromTurboAssembler(&turbo_assembler_);
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closure_bridge = (void *)code->raw_instruction_start();
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DLOG(0, "[closure bridge] Build the closure bridge at %p", closure_bridge);
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#endif
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return (void *)closure_bridge;
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}
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#endif |