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/// @file wasm-invoke.cc — WASM-side trampolines for emscripten's invoke_* ABI.
///
/// Emscripten's -fexceptions generates calls to invoke_XYZ(funcIdx, args...)
/// imported from "env". These are supposed to call table[funcIdx](args...) inside
/// a try/catch (implemented in JS via setjmp). In our WASM+wazero model, the
/// Go host provides invoke_* stubs that forward to these exported __wasm_invoke_*
/// trampolines. The trampolines perform the actual call_indirect by casting the
/// integer funcIdx to a typed function pointer — in WASM, function pointers ARE
/// table indices, so this compiles to a call_indirect instruction.
///
/// The Go host's invoke_* implementations (env.go) call the matching __wasm_invoke_*
/// export. Exception state is tracked via the __cxa_* functions in env.go.
///
/// Only the signatures actually imported by libnixexpr.wasm are included here.
/// The set is determined by: wasm-dis libnixexpr.wasm | grep 'import "env" "invoke_'
#ifdef __EMSCRIPTEN__
#include <cstdint>
// Suppress the "invoking a function pointer with wrong type" warning — we are
// intentionally doing typed indirect calls via cast function pointers.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wcast-function-type-strict"
extern "C" {
// Signature key:
// v = void, i = i32, j = i64, f = f32, d = f64
// First char after underscore = return type; remaining = arg types.
// funcIdx is always the first argument (i32), followed by the actual args.
// ----- void return -----
void __wasm_invoke_v(int funcIdx)
{
reinterpret_cast<void (*)()>(funcIdx)();
}
void __wasm_invoke_vi(int funcIdx, int a0)
{
reinterpret_cast<void (*)(int)>(funcIdx)(a0);
}
void __wasm_invoke_vii(int funcIdx, int a0, int a1)
{
reinterpret_cast<void (*)(int, int)>(funcIdx)(a0, a1);
}
void __wasm_invoke_viii(int funcIdx, int a0, int a1, int a2)
{
reinterpret_cast<void (*)(int, int, int)>(funcIdx)(a0, a1, a2);
}
void __wasm_invoke_viiii(int funcIdx, int a0, int a1, int a2, int a3)
{
reinterpret_cast<void (*)(int, int, int, int)>(funcIdx)(a0, a1, a2, a3);
}
void __wasm_invoke_viiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4)
{
reinterpret_cast<void (*)(int, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4);
}
void __wasm_invoke_viiiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5)
{
reinterpret_cast<void (*)(int, int, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4, a5);
}
void __wasm_invoke_viiiiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6)
{
reinterpret_cast<void (*)(int, int, int, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4, a5, a6);
}
void __wasm_invoke_viiiiiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6, int a7)
{
reinterpret_cast<void (*)(int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7
);
}
void __wasm_invoke_viiiiiiiii(
int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8
)
{
reinterpret_cast<void (*)(int, int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7, a8
);
}
void __wasm_invoke_viiiiiiiiii(
int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8, int a9
)
{
reinterpret_cast<void (*)(int, int, int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7, a8, a9
);
}
void __wasm_invoke_viiiiiiiiiiiiiii(
int funcIdx,
int a0,
int a1,
int a2,
int a3,
int a4,
int a5,
int a6,
int a7,
int a8,
int a9,
int a10,
int a11,
int a12,
int a13,
int a14
)
{
reinterpret_cast<
void (*)(int, int, int, int, int, int, int, int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14
);
}
// ----- void return, mixed types -----
void __wasm_invoke_viid(int funcIdx, int a0, int a1, double a2)
{
reinterpret_cast<void (*)(int, int, double)>(funcIdx)(a0, a1, a2);
}
void __wasm_invoke_viidiiii(int funcIdx, int a0, int a1, double a2, int a3, int a4, int a5, int a6)
{
reinterpret_cast<void (*)(int, int, double, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4, a5, a6);
}
void __wasm_invoke_viifiiii(int funcIdx, int a0, int a1, float a2, int a3, int a4, int a5, int a6)
{
reinterpret_cast<void (*)(int, int, float, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4, a5, a6);
}
void __wasm_invoke_viiid(int funcIdx, int a0, int a1, int a2, double a3)
{
reinterpret_cast<void (*)(int, int, int, double)>(funcIdx)(a0, a1, a2, a3);
}
void __wasm_invoke_viiidi(int funcIdx, int a0, int a1, int a2, double a3, int a4)
{
reinterpret_cast<void (*)(int, int, int, double, int)>(funcIdx)(a0, a1, a2, a3, a4);
}
void __wasm_invoke_viiifi(int funcIdx, int a0, int a1, int a2, float a3, int a4)
{
reinterpret_cast<void (*)(int, int, int, float, int)>(funcIdx)(a0, a1, a2, a3, a4);
}
void __wasm_invoke_viijii(int funcIdx, int a0, int a1, int64_t a2, int a3, int a4)
{
reinterpret_cast<void (*)(int, int, int64_t, int, int)>(funcIdx)(a0, a1, a2, a3, a4);
}
void __wasm_invoke_viijjiiii(
int funcIdx, int a0, int a1, int64_t a2, int64_t a3, int a4, int a5, int a6, int a7
)
{
reinterpret_cast<void (*)(int, int, int64_t, int64_t, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7
);
}
// ----- i32 return -----
int __wasm_invoke_i(int funcIdx)
{
return reinterpret_cast<int (*)()>(funcIdx)();
}
int __wasm_invoke_ii(int funcIdx, int a0)
{
return reinterpret_cast<int (*)(int)>(funcIdx)(a0);
}
int __wasm_invoke_iii(int funcIdx, int a0, int a1)
{
return reinterpret_cast<int (*)(int, int)>(funcIdx)(a0, a1);
}
int __wasm_invoke_iiii(int funcIdx, int a0, int a1, int a2)
{
return reinterpret_cast<int (*)(int, int, int)>(funcIdx)(a0, a1, a2);
}
int __wasm_invoke_iiiii(int funcIdx, int a0, int a1, int a2, int a3)
{
return reinterpret_cast<int (*)(int, int, int, int)>(funcIdx)(a0, a1, a2, a3);
}
int __wasm_invoke_iiiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4)
{
return reinterpret_cast<int (*)(int, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4);
}
int __wasm_invoke_iiiiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5)
{
return reinterpret_cast<int (*)(int, int, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4, a5);
}
int __wasm_invoke_iiiiiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6)
{
return reinterpret_cast<int (*)(int, int, int, int, int, int, int)>(funcIdx)(a0, a1, a2, a3, a4, a5, a6);
}
int __wasm_invoke_iiiiiiiii(int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6, int a7)
{
return reinterpret_cast<int (*)(int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7
);
}
int __wasm_invoke_iiiiiiiiii(
int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8
)
{
return reinterpret_cast<int (*)(int, int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7, a8
);
}
int __wasm_invoke_iiiiiiiiiii(
int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8, int a9
)
{
return reinterpret_cast<int (*)(int, int, int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7, a8, a9
);
}
int __wasm_invoke_iiiiiiiiiiii(
int funcIdx, int a0, int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8, int a9, int a10
)
{
return reinterpret_cast<int (*)(int, int, int, int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10
);
}
int __wasm_invoke_iiiiiiiiiiiii(
int funcIdx,
int a0,
int a1,
int a2,
int a3,
int a4,
int a5,
int a6,
int a7,
int a8,
int a9,
int a10,
int a11
)
{
return reinterpret_cast<int (*)(int, int, int, int, int, int, int, int, int, int, int, int)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11
);
}
// ----- i32 return, mixed types -----
int __wasm_invoke_iidi(int funcIdx, int a0, double a1, int a2)
{
return reinterpret_cast<int (*)(int, double, int)>(funcIdx)(a0, a1, a2);
}
int __wasm_invoke_iiiiid(int funcIdx, int a0, int a1, int a2, int a3, double a4)
{
return reinterpret_cast<int (*)(int, int, int, int, double)>(funcIdx)(a0, a1, a2, a3, a4);
}
int __wasm_invoke_iiiiij(int funcIdx, int a0, int a1, int a2, int a3, int64_t a4)
{
return reinterpret_cast<int (*)(int, int, int, int, int64_t)>(funcIdx)(a0, a1, a2, a3, a4);
}
int __wasm_invoke_iij(int funcIdx, int a0, int64_t a1)
{
return reinterpret_cast<int (*)(int, int64_t)>(funcIdx)(a0, a1);
}
int __wasm_invoke_iijii(int funcIdx, int a0, int64_t a1, int a2, int a3)
{
return reinterpret_cast<int (*)(int, int64_t, int, int)>(funcIdx)(a0, a1, a2, a3);
}
int __wasm_invoke_iijiiiij(int funcIdx, int a0, int64_t a1, int a2, int a3, int a4, int a5, int64_t a6)
{
return reinterpret_cast<int (*)(int, int64_t, int, int, int, int, int64_t)>(funcIdx)(
a0, a1, a2, a3, a4, a5, a6
);
}
int __wasm_invoke_iijjjj(int funcIdx, int a0, int64_t a1, int64_t a2, int64_t a3, int64_t a4)
{
return reinterpret_cast<int (*)(int, int64_t, int64_t, int64_t, int64_t)>(funcIdx)(a0, a1, a2, a3, a4);
}
// ----- i64 return -----
int64_t __wasm_invoke_j(int funcIdx)
{
return reinterpret_cast<int64_t (*)()>(funcIdx)();
}
int64_t __wasm_invoke_ji(int funcIdx, int a0)
{
return reinterpret_cast<int64_t (*)(int)>(funcIdx)(a0);
}
int64_t __wasm_invoke_jiii(int funcIdx, int a0, int a1, int a2)
{
return reinterpret_cast<int64_t (*)(int, int, int)>(funcIdx)(a0, a1, a2);
}
int64_t __wasm_invoke_jiiii(int funcIdx, int a0, int a1, int a2, int a3)
{
return reinterpret_cast<int64_t (*)(int, int, int, int)>(funcIdx)(a0, a1, a2, a3);
}
// ----- f64 return -----
double __wasm_invoke_dii(int funcIdx, int a0, int a1)
{
return reinterpret_cast<double (*)(int, int)>(funcIdx)(a0, a1);
}
double __wasm_invoke_diii(int funcIdx, int a0, int a1, int a2)
{
return reinterpret_cast<double (*)(int, int, int)>(funcIdx)(a0, a1, a2);
}
// ----- f32 return -----
float __wasm_invoke_fiii(int funcIdx, int a0, int a1, int a2)
{
return reinterpret_cast<float (*)(int, int, int)>(funcIdx)(a0, a1, a2);
}
} // extern "C"
#pragma clang diagnostic pop
#endif // __EMSCRIPTEN__
|