github.com/MerlinKodo/gvisor@v0.0.0-20231110090155-957f62ecf90e/pkg/sentry/loader/vdso_state.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package loader
    16  
    17  import (
    18  	"debug/elf"
    19  )
    20  
    21  // +stateify savable
    22  type elfProgHeader struct {
    23  	Type   elf.ProgType
    24  	Flags  elf.ProgFlag
    25  	Off    uint64
    26  	Vaddr  uint64
    27  	Paddr  uint64
    28  	Filesz uint64
    29  	Memsz  uint64
    30  	Align  uint64
    31  }
    32  
    33  // savePhdrs is invoked by stateify.
    34  func (v *VDSO) savePhdrs() []elfProgHeader {
    35  	s := make([]elfProgHeader, 0, len(v.phdrs))
    36  	for _, h := range v.phdrs {
    37  		s = append(s, elfProgHeader(h))
    38  	}
    39  	return s
    40  }
    41  
    42  // loadPhdrs is invoked by stateify.
    43  func (v *VDSO) loadPhdrs(s []elfProgHeader) {
    44  	v.phdrs = make([]elf.ProgHeader, 0, len(s))
    45  	for _, h := range s {
    46  		v.phdrs = append(v.phdrs, elf.ProgHeader(h))
    47  	}
    48  }