mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-30 00:16:48 +00:00
4943838e28
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235325 91177308-0d34-0410-b5e6-96231b3b80d8
139 lines
4.4 KiB
C++
139 lines
4.4 KiB
C++
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/ExecutionEngine/Orc/OrcTargetSupport.h"
|
|
#include <array>
|
|
|
|
using namespace llvm::orc;
|
|
|
|
namespace {
|
|
|
|
uint64_t executeCompileCallback(JITCompileCallbackManagerBase *JCBM,
|
|
TargetAddress CallbackID) {
|
|
return JCBM->executeCompileCallback(CallbackID);
|
|
}
|
|
|
|
}
|
|
|
|
namespace llvm {
|
|
namespace orc {
|
|
|
|
const char* OrcX86_64::ResolverBlockName = "orc_resolver_block";
|
|
|
|
void OrcX86_64::insertResolverBlock(
|
|
Module &M, JITCompileCallbackManagerBase &JCBM) {
|
|
|
|
// Trampoline code-sequence length, used to get trampoline address from return
|
|
// address.
|
|
const unsigned X86_64_TrampolineLength = 6;
|
|
|
|
// List of x86-64 GPRs to save. Note - RBP saved separately below.
|
|
std::array<const char *, 14> GPRs = {{
|
|
"rax", "rbx", "rcx", "rdx",
|
|
"rsi", "rdi", "r8", "r9",
|
|
"r10", "r11", "r12", "r13",
|
|
"r14", "r15"
|
|
}};
|
|
|
|
// Address of the executeCompileCallback function.
|
|
uint64_t CallbackAddr =
|
|
static_cast<uint64_t>(
|
|
reinterpret_cast<uintptr_t>(executeCompileCallback));
|
|
|
|
std::ostringstream AsmStream;
|
|
Triple TT(M.getTargetTriple());
|
|
|
|
// Switch to text section.
|
|
if (TT.getOS() == Triple::Darwin)
|
|
AsmStream << ".section __TEXT,__text,regular,pure_instructions\n"
|
|
<< ".align 4, 0x90\n";
|
|
else
|
|
AsmStream << ".text\n"
|
|
<< ".align 16, 0x90\n";
|
|
|
|
// Bake in a pointer to the callback manager immediately before the
|
|
// start of the resolver function.
|
|
AsmStream << "jit_callback_manager_addr:\n"
|
|
<< " .quad " << &JCBM << "\n";
|
|
|
|
// Start the resolver function.
|
|
AsmStream << ResolverBlockName << ":\n"
|
|
<< " pushq %rbp\n"
|
|
<< " movq %rsp, %rbp\n";
|
|
|
|
// Store the GPRs.
|
|
for (const auto &GPR : GPRs)
|
|
AsmStream << " pushq %" << GPR << "\n";
|
|
|
|
// Store floating-point state with FXSAVE.
|
|
// Note: We need to keep the stack 16-byte aligned, so if we've emitted an odd
|
|
// number of 64-bit pushes so far (GPRs.size() plus 1 for RBP) then add
|
|
// an extra 64 bits of padding to the FXSave area.
|
|
unsigned Padding = (GPRs.size() + 1) % 2 ? 8 : 0;
|
|
unsigned FXSaveSize = 512 + Padding;
|
|
AsmStream << " subq $" << FXSaveSize << ", %rsp\n"
|
|
<< " fxsave64 (%rsp)\n"
|
|
|
|
// Load callback manager address, compute trampoline address, call JIT.
|
|
<< " lea jit_callback_manager_addr(%rip), %rdi\n"
|
|
<< " movq (%rdi), %rdi\n"
|
|
<< " movq 0x8(%rbp), %rsi\n"
|
|
<< " subq $" << X86_64_TrampolineLength << ", %rsi\n"
|
|
<< " movabsq $" << CallbackAddr << ", %rax\n"
|
|
<< " callq *%rax\n"
|
|
|
|
// Replace the return to the trampoline with the return address of the
|
|
// compiled function body.
|
|
<< " movq %rax, 0x8(%rbp)\n"
|
|
|
|
// Restore the floating point state.
|
|
<< " fxrstor64 (%rsp)\n"
|
|
<< " addq $" << FXSaveSize << ", %rsp\n";
|
|
|
|
for (const auto &GPR : make_range(GPRs.rbegin(), GPRs.rend()))
|
|
AsmStream << " popq %" << GPR << "\n";
|
|
|
|
// Restore original RBP and return to compiled function body.
|
|
AsmStream << " popq %rbp\n"
|
|
<< " retq\n";
|
|
|
|
M.appendModuleInlineAsm(AsmStream.str());
|
|
}
|
|
|
|
OrcX86_64::LabelNameFtor
|
|
OrcX86_64::insertCompileCallbackTrampolines(Module &M,
|
|
TargetAddress ResolverBlockAddr,
|
|
unsigned NumCalls,
|
|
unsigned StartIndex) {
|
|
const char *ResolverBlockPtrName = "Lorc_resolve_block_addr";
|
|
|
|
std::ostringstream AsmStream;
|
|
Triple TT(M.getTargetTriple());
|
|
|
|
if (TT.getOS() == Triple::Darwin)
|
|
AsmStream << ".section __TEXT,__text,regular,pure_instructions\n"
|
|
<< ".align 4, 0x90\n";
|
|
else
|
|
AsmStream << ".text\n"
|
|
<< ".align 16, 0x90\n";
|
|
|
|
AsmStream << ResolverBlockPtrName << ":\n"
|
|
<< " .quad " << ResolverBlockAddr << "\n";
|
|
|
|
auto GetLabelName =
|
|
[=](unsigned I) {
|
|
std::ostringstream LabelStream;
|
|
LabelStream << "orc_jcc_" << (StartIndex + I);
|
|
return LabelStream.str();
|
|
};
|
|
|
|
for (unsigned I = 0; I < NumCalls; ++I)
|
|
AsmStream << GetLabelName(I) << ":\n"
|
|
<< " callq *" << ResolverBlockPtrName << "(%rip)\n";
|
|
|
|
M.appendModuleInlineAsm(AsmStream.str());
|
|
|
|
return GetLabelName;
|
|
}
|
|
|
|
} // End namespace orc.
|
|
} // End namespace llvm.
|