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[a64] Fix indirect and external calls

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This commit is contained in:
Wunkolo
2024-06-23 14:00:22 -07:00
parent bf941bffe1
commit ea7475eb6c
1 changed files with 30 additions and 0 deletions
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a64_emitter.cc
+30
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@@ -510,7 +510,14 @@ void A64Emitter::CallIndirect(const hir::Instr* instr,
MOV(W1, reg.toW());
ADRP(X16, ResolveFunction);
// Preserve frame and link register
STP(X29, X30, XSP, POST_INDEXED, -16);
BLR(X16);
// Restore frame and link register
LDP(X29, X30, XSP, PRE_INDEXED, 16);
}
// Actually jump/call to rax.
@@ -532,7 +539,14 @@ void A64Emitter::CallIndirect(const hir::Instr* instr,
// mov(rcx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
// call(rax);
LDR(X0, XSP, StackLayout::GUEST_CALL_RET_ADDR);
// Preserve frame and link register
STP(X29, X30, XSP, POST_INDEXED, -16);
BLR(X16);
// Restore frame and link register
LDP(X29, X30, XSP, PRE_INDEXED, 16);
}
}
@@ -568,7 +582,15 @@ void A64Emitter::CallExtern(const hir::Instr* instr, const Function* function) {
MOV(X2, reinterpret_cast<uint64_t>(builtin_function->arg1()));
MOV(X16, reinterpret_cast<uint64_t>(thunk));
// Preserve frame and link register
STP(X29, X30, XSP, POST_INDEXED, -16);
BLR(X16);
// Restore frame and link register
LDP(X29, X30, XSP, PRE_INDEXED, 16);
// x0 = host return
}
} else if (function->behavior() == Function::Behavior::kExtern) {
@@ -591,7 +613,15 @@ void A64Emitter::CallExtern(const hir::Instr* instr, const Function* function) {
LDR(X2, GetContextReg(), offsetof(ppc::PPCContext, kernel_state));
MOV(X16, reinterpret_cast<uint64_t>(thunk));
// Preserve frame and link register
STP(X29, X30, XSP, POST_INDEXED, -16);
BLR(X16);
// Restore frame and link register
LDP(X29, X30, XSP, PRE_INDEXED, 16);
// x0 = host return
}
}