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https://github.com/geode-sdk/geode.git
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112 lines
No EOL
2.7 KiB
C++
112 lines
No EOL
2.7 KiB
C++
#include "platform_macro.h"
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#if defined(TARGET_ARCH_IA32)
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#include "dobby_internal.h"
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#include "core/modules/assembler/assembler-ia32.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::x86;
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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 *pushfd = (char *)"\x9c";
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char *popfd = (char *)"\x9d";
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TurboAssembler turbo_assembler_(0);
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// general register
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_ sub(esp, Immediate(8 * 4, 32));
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_ mov(Address(esp, 4 * 0), eax);
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_ mov(Address(esp, 4 * 1), ebx);
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_ mov(Address(esp, 4 * 2), ecx);
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_ mov(Address(esp, 4 * 3), edx);
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_ mov(Address(esp, 4 * 4), ebp);
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_ mov(Address(esp, 4 * 5), esp);
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_ mov(Address(esp, 4 * 6), edi);
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_ mov(Address(esp, 4 * 7), esi);
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// save flags register
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__ EmitBuffer(pushfd, 1);
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_ pop(eax);
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{ // save to stack
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_ sub(esp, Immediate(2 * 4, 32));
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_ mov(Address(esp, 4), eax);
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}
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// save origin sp
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_ mov(eax, esp);
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_ add(eax, Immediate(8 * 4 + 2 * 4 + 4, 32));
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{ // save to stack
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_ sub(esp, Immediate(2 * 4, 32));
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_ mov(Address(esp, 4), eax);
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}
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// ======= Jump to UnifiedInterface Bridge Handle =======
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// prepare args
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_ sub(esp, Immediate(2 * 4, 32));
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_ mov(eax, Address(esp, 8 * 4 + 2 * 4 + 2 * 4 + 2 * 4));
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_ mov(Address(esp, 4), eax);
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_ mov(eax, esp);
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_ add(eax, Immediate(2 * 4, 32));
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_ mov(Address(esp, 0), eax);
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// LABEL: call_bridge
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_ CallFunction(ExternalReference((void *)intercept_routing_common_bridge_handler));
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// ======= RegisterContext Restore =======
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// restore argument reserved stack
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_ add(esp, Immediate(2 * 4, 32));
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// restore sp placeholder stack
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_ add(esp, Immediate(2 * 4, 32));
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_ add(esp, Immediate(4, 32));
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// restore flags register
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__ EmitBuffer(popfd, 1);
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// general register
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_ pop(eax);
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_ pop(ebx);
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_ pop(ecx);
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_ pop(edx);
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_ pop(ebp);
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_ add(esp, Immediate(4, 32)); // => pop rsp
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_ pop(edi);
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_ pop(esi);
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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 |