github.com/tencent/goom@v1.0.1/internal/hack/ifunc_16.go (about)

     1  //go:build go1.16 && !go1.18
     2  // +build go1.16,!go1.18
     3  
     4  // Package hack 对 go 系统包的 hack, 包含一些系统结构体的 copy，需要和不同的 go 版本保持同步
     5  package hack
     6  
     7  import (
     8  	"unsafe"
     9  	_ "unsafe" // 匿名引入
    10  )
    11  
    12  // InterceptCallerSkip 拦截器 callerskip
    13  const InterceptCallerSkip = 5
    14  
    15  // Firstmoduledata keep async with runtime.Firstmoduledata
    16  //go:linkname Firstmoduledata runtime.firstmoduledata
    17  var Firstmoduledata Moduledata
    18  
    19  // nolint
    20  // Moduledata keep async with runtime.Moduledata
    21  type Moduledata struct {
    22  	pcHeader     uintptr
    23  	funcnametab  []byte
    24  	cutab        []uint32
    25  	filetab      []byte
    26  	pctab        []byte
    27  	Pclntable    []byte
    28  	Ftab         []Functab
    29  	findfunctab  uintptr
    30  	minpc, maxpc uintptr
    31  
    32  	text, etext           uintptr
    33  	noptrdata, enoptrdata uintptr
    34  	data, edata           uintptr
    35  	bss, ebss             uintptr
    36  	noptrbss, enoptrbss   uintptr
    37  	end, gcdata, gcbss    uintptr
    38  	types, etypes         uintptr
    39  
    40  	textsectmap []textsect
    41  	typelinks   []int32 // offsets from types
    42  	itablinks   []*uintptr
    43  
    44  	ptab []interface{}
    45  
    46  	pluginpath string
    47  	pkghashes  []interface{}
    48  
    49  	modulename   string
    50  	modulehashes []interface{}
    51  
    52  	hasmain uint8 // 1 if module contains the main function, 0 otherwise
    53  
    54  	gcdatamask, gcbssmask Bitvector
    55  
    56  	typemap map[typeOff]*interface{} // offset to *_rtype in previous module
    57  
    58  	bad bool // module failed to load and should be ignored
    59  
    60  	Next *Moduledata
    61  }
    62  
    63  // Functab Functab
    64  type Functab struct {
    65  	Entry   uintptr
    66  	Funcoff uintptr
    67  }
    68  
    69  // nolint
    70  type textsect struct {
    71  	// nolint
    72  	vaddr    uintptr // prelinked section vaddr
    73  	length   uintptr // section length
    74  	baseaddr uintptr // relocated section address
    75  }
    76  
    77  // Bitvector Bitvector
    78  type Bitvector struct {
    79  	// nolint
    80  	n int32 // # of bits
    81  	// nolint
    82  	bytedata *uint8
    83  }
    84  
    85  // nolint
    86  type typeOff int32 // offset to an *rtype
    87  
    88  // Func convenience struct for modifying the underlying code pointer of a function
    89  // value. The actual struct has other values, but always starts with a code
    90  // pointer.
    91  // keep async with runtime.Func
    92  type Func struct {
    93  	CodePtr uintptr
    94  }
    95  
    96  // Value reflect.Value
    97  // keep async with runtime.Value
    98  type Value struct {
    99  	Typ  *uintptr
   100  	Ptr  unsafe.Pointer
   101  	Flag uintptr
   102  }