104 lines
3.3 KiB
Go
104 lines
3.3 KiB
Go
|
//go:build go1.16 && !go1.21
|
||
|
|
// +build go1.16,!go1.21
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 2021 ByteDance Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package loader
|
||
|
|
|
||
|
|
import (
|
||
|
|
`github.com/bytedance/sonic/internal/rt`
|
||
|
|
)
|
||
|
|
|
||
|
|
// LoadFuncs loads only one function as module, and returns the function pointer
|
||
|
|
// - text: machine code
|
||
|
|
// - funcName: function name
|
||
|
|
// - frameSize: stack frame size.
|
||
|
|
// - argSize: argument total size (in bytes)
|
||
|
|
// - argPtrs: indicates if a slot (8 Bytes) of arguments memory stores pointer, from low to high
|
||
|
|
// - localPtrs: indicates if a slot (8 Bytes) of local variants memory stores pointer, from low to high
|
||
|
|
//
|
||
|
|
// WARN:
|
||
|
|
// - the function MUST has fixed SP offset equaling to this, otherwise it go.gentraceback will fail
|
||
|
|
// - the function MUST has only one stack map for all arguments and local variants
|
||
|
|
func (self Loader) LoadOne(text []byte, funcName string, frameSize int, argSize int, argPtrs []bool, localPtrs []bool) Function {
|
||
|
|
size := uint32(len(text))
|
||
|
|
|
||
|
|
fn := Func{
|
||
|
|
Name: funcName,
|
||
|
|
TextSize: size,
|
||
|
|
ArgsSize: int32(argSize),
|
||
|
|
}
|
||
|
|
|
||
|
|
// NOTICE: suppose the function has fixed SP offset equaling to frameSize, thus make only one pcsp pair
|
||
|
|
fn.Pcsp = &Pcdata{
|
||
|
|
{PC: size, Val: int32(frameSize)},
|
||
|
|
}
|
||
|
|
|
||
|
|
if self.NoPreempt {
|
||
|
|
fn.PcUnsafePoint = &Pcdata{
|
||
|
|
{PC: size, Val: PCDATA_UnsafePointUnsafe},
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
fn.PcUnsafePoint = &Pcdata{
|
||
|
|
{PC: size, Val: PCDATA_UnsafePointSafe},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// NOTICE: suppose the function has only one stack map at index 0
|
||
|
|
fn.PcStackMapIndex = &Pcdata{
|
||
|
|
{PC: size, Val: 0},
|
||
|
|
}
|
||
|
|
|
||
|
|
if argPtrs != nil {
|
||
|
|
args := rt.StackMapBuilder{}
|
||
|
|
for _, b := range argPtrs {
|
||
|
|
args.AddField(b)
|
||
|
|
}
|
||
|
|
fn.ArgsPointerMaps = args.Build()
|
||
|
|
}
|
||
|
|
|
||
|
|
if localPtrs != nil {
|
||
|
|
locals := rt .StackMapBuilder{}
|
||
|
|
for _, b := range localPtrs {
|
||
|
|
locals.AddField(b)
|
||
|
|
}
|
||
|
|
fn.LocalsPointerMaps = locals.Build()
|
||
|
|
}
|
||
|
|
|
||
|
|
out := Load(text, []Func{fn}, self.Name + funcName, []string{self.File})
|
||
|
|
return out[0]
|
||
|
|
}
|
||
|
|
|
||
|
|
// Load loads given machine codes and corresponding function information into go moduledata
|
||
|
|
// and returns runnable function pointer
|
||
|
|
// WARN: this API is experimental, use it carefully
|
||
|
|
func Load(text []byte, funcs []Func, modulename string, filenames []string) (out []Function) {
|
||
|
|
// generate module data and allocate memory address
|
||
|
|
mod := makeModuledata(modulename, filenames, funcs, text)
|
||
|
|
|
||
|
|
// verify and register the new module
|
||
|
|
moduledataverify1(mod)
|
||
|
|
registerModule(mod)
|
||
|
|
|
||
|
|
// encapsulate function address
|
||
|
|
out = make([]Function, len(funcs))
|
||
|
|
for i, f := range funcs {
|
||
|
|
m := uintptr(mod.text + uintptr(f.EntryOff))
|
||
|
|
out[i] = Function(&m)
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|