snapshot: sagernet/gvisor v0.0.0-20250811.0-sing-box-mod.1

Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом
без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в
каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для
неё не нужна.

Module path github.com/sagernet/gvisor сохранён намеренно: на него
опирается replace-директива суперпроекта.

Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show
и переносилась на новый пин копированием.

SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH

pkg/abi/linux/elf.go

@@ -0,0 +1,158 @@
+// Copyright 2018 The gVisor Authors.
+//
+// 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 linux
+
+// Linux auxiliary vector entry types.
+const (
+	// AT_NULL is the end of the auxiliary vector.
+	AT_NULL = 0
+
+	// AT_IGNORE should be ignored.
+	AT_IGNORE = 1
+
+	// AT_EXECFD is the file descriptor of the program.
+	AT_EXECFD = 2
+
+	// AT_PHDR points to the program headers.
+	AT_PHDR = 3
+
+	// AT_PHENT is the size of a program header entry.
+	AT_PHENT = 4
+
+	// AT_PHNUM is the number of program headers.
+	AT_PHNUM = 5
+
+	// AT_PAGESZ is the system page size.
+	AT_PAGESZ = 6
+
+	// AT_BASE is the base address of the interpreter.
+	AT_BASE = 7
+
+	// AT_FLAGS are flags.
+	AT_FLAGS = 8
+
+	// AT_ENTRY is the program entry point.
+	AT_ENTRY = 9
+
+	// AT_NOTELF indicates that the program is not an ELF binary.
+	AT_NOTELF = 10
+
+	// AT_UID is the real UID.
+	AT_UID = 11
+
+	// AT_EUID is the effective UID.
+	AT_EUID = 12
+
+	// AT_GID is the real GID.
+	AT_GID = 13
+
+	// AT_EGID is the effective GID.
+	AT_EGID = 14
+
+	// AT_PLATFORM is a string identifying the CPU.
+	AT_PLATFORM = 15
+
+	// AT_HWCAP are arch-dependent CPU capabilities.
+	AT_HWCAP = 16
+
+	// AT_CLKTCK is the frequency used by times(2).
+	AT_CLKTCK = 17
+
+	// AT_SECURE indicate secure mode.
+	AT_SECURE = 23
+
+	// AT_BASE_PLATFORM is a string identifying the "real" platform. It may
+	// differ from AT_PLATFORM.
+	AT_BASE_PLATFORM = 24
+
+	// AT_RANDOM points to 16-bytes of random data.
+	AT_RANDOM = 25
+
+	// AT_HWCAP2 is an extension of AT_HWCAP.
+	AT_HWCAP2 = 26
+
+	// AT_EXECFN is the path used to execute the program.
+	AT_EXECFN = 31
+
+	// AT_SYSINFO_EHDR is the address of the VDSO.
+	AT_SYSINFO_EHDR = 33
+)
+
+// ELF ET_CORE and ptrace GETREGSET/SETREGSET register set types.
+//
+// See include/uapi/linux/elf.h.
+const (
+	// NT_PRSTATUS is for general purpose register.
+	NT_PRSTATUS = 0x1
+
+	// NT_PRFPREG is for float point register.
+	NT_PRFPREG = 0x2
+
+	// NT_X86_XSTATE is for x86 extended state using xsave.
+	NT_X86_XSTATE = 0x202
+
+	// NT_ARM_TLS is for ARM TLS register.
+	NT_ARM_TLS = 0x401
+)
+
+// ElfHeader64 is the ELF64 file header.
+//
+// +marshal
+type ElfHeader64 struct {
+	Ident     [16]byte // File identification.
+	Type      uint16   // File type.
+	Machine   uint16   // Machine architecture.
+	Version   uint32   // ELF format version.
+	Entry     uint64   // Entry point.
+	Phoff     uint64   // Program header file offset.
+	Shoff     uint64   // Section header file offset.
+	Flags     uint32   // Architecture-specific flags.
+	Ehsize    uint16   // Size of ELF header in bytes.
+	Phentsize uint16   // Size of program header entry.
+	Phnum     uint16   // Number of program header entries.
+	Shentsize uint16   // Size of section header entry.
+	Shnum     uint16   // Number of section header entries.
+	Shstrndx  uint16   // Section name strings section.
+}
+
+// ElfSection64 is the ELF64 Section header.
+//
+// +marshal
+type ElfSection64 struct {
+	Name      uint32 // Section name (index into the section header string table).
+	Type      uint32 // Section type.
+	Flags     uint64 // Section flags.
+	Addr      uint64 // Address in memory image.
+	Off       uint64 // Offset in file.
+	Size      uint64 // Size in bytes.
+	Link      uint32 // Index of a related section.
+	Info      uint32 // Depends on section type.
+	Addralign uint64 // Alignment in bytes.
+	Entsize   uint64 // Size of each entry in section.
+}
+
+// ElfProg64 is the ELF64 Program header.
+//
+// +marshal
+type ElfProg64 struct {
+	Type   uint32 // Entry type.
+	Flags  uint32 // Access permission flags.
+	Off    uint64 // File offset of contents.
+	Vaddr  uint64 // Virtual address in memory image.
+	Paddr  uint64 // Physical address (not used).
+	Filesz uint64 // Size of contents in file.
+	Memsz  uint64 // Size of contents in memory.
+	Align  uint64 // Alignment in memory and file.
+}