Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

vendor/object/src/xcoff.rs

@@ -0,0 +1,905 @@
+//! XCOFF definitions
+//!
+//! These definitions are independent of read/write support, although we do implement
+//! some traits useful for those.
+//!
+//! This module is the equivalent of /usr/include/xcoff.h, and is based heavily on it.
+
+#![allow(missing_docs)]
+
+use crate::endian::{BigEndian as BE, I16, U16, U32, U64};
+use crate::pod::Pod;
+
+/// The header at the start of every 32-bit XCOFF file.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileHeader32 {
+    /// Magic number. Must be 0x01DF.
+    pub f_magic: U16<BE>,
+    /// Number of sections.
+    pub f_nscns: U16<BE>,
+    /// Time and date of file creation.
+    pub f_timdat: U32<BE>,
+    /// Byte offset to symbol table start.
+    pub f_symptr: U32<BE>,
+    /// Number of entries in symbol table.
+    pub f_nsyms: U32<BE>,
+    /// Number of bytes in optional header
+    pub f_opthdr: U16<BE>,
+    /// Extra flags.
+    pub f_flags: U16<BE>,
+}
+
+/// The header at the start of every 64-bit XCOFF file.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileHeader64 {
+    /// Magic number. Must be 0x01F7.
+    pub f_magic: U16<BE>,
+    /// Number of sections.
+    pub f_nscns: U16<BE>,
+    /// Time and date of file creation
+    pub f_timdat: U32<BE>,
+    /// Byte offset to symbol table start.
+    pub f_symptr: U64<BE>,
+    /// Number of bytes in optional header
+    pub f_opthdr: U16<BE>,
+    /// Extra flags.
+    pub f_flags: U16<BE>,
+    /// Number of entries in symbol table.
+    pub f_nsyms: U32<BE>,
+}
+
+// Values for `f_magic`.
+//
+/// the 64-bit mach magic number
+pub const MAGIC_64: u16 = 0x01F7;
+/// the 32-bit mach magic number
+pub const MAGIC_32: u16 = 0x01DF;
+
+// Values for `f_flags`.
+//
+/// Indicates that the relocation information for binding has been removed from
+/// the file.
+pub const F_RELFLG: u16 = 0x0001;
+/// Indicates that the file is executable. No unresolved external references exist.
+pub const F_EXEC: u16 = 0x0002;
+/// Indicates that line numbers have been stripped from the file by a utility program.
+pub const F_LNNO: u16 = 0x0004;
+/// Indicates that the file was profiled with the fdpr command.
+pub const F_FDPR_PROF: u16 = 0x0010;
+/// Indicates that the file was reordered with the fdpr command.
+pub const F_FDPR_OPTI: u16 = 0x0020;
+/// Indicates that the file uses Very Large Program Support.
+pub const F_DSA: u16 = 0x0040;
+/// Indicates that one of the members of the auxiliary header specifying the
+/// medium page sizes is non-zero.
+pub const F_VARPG: u16 = 0x0100;
+/// Indicates the file is dynamically loadable and executable. External references
+/// are resolved by way of imports, and the file might contain exports and loader
+/// relocation.
+pub const F_DYNLOAD: u16 = 0x1000;
+/// Indicates the file is a shared object (shared library). The file is separately
+/// loadable. That is, it is not normally bound with other objects, and its loader
+/// exports symbols are used as automatic import symbols for other object files.
+pub const F_SHROBJ: u16 = 0x2000;
+/// If the object file is a member of an archive, it can be loaded by the system
+/// loader, but the member is ignored by the binder. If the object file is not in
+/// an archive, this flag has no effect.
+pub const F_LOADONLY: u16 = 0x4000;
+
+/// The auxiliary header immediately following file header. If the value of the
+/// f_opthdr field in the file header is 0, the auxiliary header does not exist.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AuxHeader32 {
+    /// Flags.
+    pub o_mflag: U16<BE>,
+    /// Version.
+    pub o_vstamp: U16<BE>,
+    /// Text size in bytes.
+    pub o_tsize: U32<BE>,
+    /// Initialized data size in bytes.
+    pub o_dsize: U32<BE>,
+    /// Uninitialized data size in bytes.
+    pub o_bsize: U32<BE>,
+    /// Entry point descriptor (virtual address).
+    pub o_entry: U32<BE>,
+    /// Base address of text (virtual address).
+    pub o_text_start: U32<BE>,
+    /// Base address of data (virtual address).
+    pub o_data_start: U32<BE>,
+    /// Address of TOC anchor.
+    pub o_toc: U32<BE>,
+    /// Section number for entry point.
+    pub o_snentry: U16<BE>,
+    /// Section number for .text.
+    pub o_sntext: U16<BE>,
+    /// Section number for .data.
+    pub o_sndata: U16<BE>,
+    /// Section number for TOC.
+    pub o_sntoc: U16<BE>,
+    /// Section number for loader data.
+    pub o_snloader: U16<BE>,
+    /// Section number for .bss.
+    pub o_snbss: U16<BE>,
+    /// Maximum alignment for .text.
+    pub o_algntext: U16<BE>,
+    /// Maximum alignment for .data.
+    pub o_algndata: U16<BE>,
+    /// Module type field.
+    pub o_modtype: U16<BE>,
+    /// Bit flags - cpu types of objects.
+    pub o_cpuflag: u8,
+    /// Reserved for CPU type.
+    pub o_cputype: u8,
+    /// Maximum stack size allowed (bytes).
+    pub o_maxstack: U32<BE>,
+    /// Maximum data size allowed (bytes).
+    pub o_maxdata: U32<BE>,
+    /// Reserved for debuggers.
+    pub o_debugger: U32<BE>,
+    /// Requested text page size.
+    pub o_textpsize: u8,
+    /// Requested data page size.
+    pub o_datapsize: u8,
+    /// Requested stack page size.
+    pub o_stackpsize: u8,
+    /// Flags and thread-local storage alignment.
+    pub o_flags: u8,
+    /// Section number for .tdata.
+    pub o_sntdata: U16<BE>,
+    /// Section number for .tbss.
+    pub o_sntbss: U16<BE>,
+}
+
+/// The auxiliary header immediately following file header. If the value of the
+/// f_opthdr field in the file header is 0, the auxiliary header does not exist.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AuxHeader64 {
+    /// Flags.
+    pub o_mflag: U16<BE>,
+    /// Version.
+    pub o_vstamp: U16<BE>,
+    /// Reserved for debuggers.
+    pub o_debugger: U32<BE>,
+    /// Base address of text (virtual address).
+    pub o_text_start: U64<BE>,
+    /// Base address of data (virtual address).
+    pub o_data_start: U64<BE>,
+    /// Address of TOC anchor.
+    pub o_toc: U64<BE>,
+    /// Section number for entry point.
+    pub o_snentry: U16<BE>,
+    /// Section number for .text.
+    pub o_sntext: U16<BE>,
+    /// Section number for .data.
+    pub o_sndata: U16<BE>,
+    /// Section number for TOC.
+    pub o_sntoc: U16<BE>,
+    /// Section number for loader data.
+    pub o_snloader: U16<BE>,
+    /// Section number for .bss.
+    pub o_snbss: U16<BE>,
+    /// Maximum alignment for .text.
+    pub o_algntext: U16<BE>,
+    /// Maximum alignment for .data.
+    pub o_algndata: U16<BE>,
+    /// Module type field.
+    pub o_modtype: U16<BE>,
+    /// Bit flags - cpu types of objects.
+    pub o_cpuflag: u8,
+    /// Reserved for CPU type.
+    pub o_cputype: u8,
+    /// Requested text page size.
+    pub o_textpsize: u8,
+    /// Requested data page size.
+    pub o_datapsize: u8,
+    /// Requested stack page size.
+    pub o_stackpsize: u8,
+    /// Flags and thread-local storage alignment.
+    pub o_flags: u8,
+    /// Text size in bytes.
+    pub o_tsize: U64<BE>,
+    /// Initialized data size in bytes.
+    pub o_dsize: U64<BE>,
+    /// Uninitialized data size in bytes.
+    pub o_bsize: U64<BE>,
+    /// Entry point descriptor (virtual address).
+    pub o_entry: U64<BE>,
+    /// Maximum stack size allowed (bytes).
+    pub o_maxstack: U64<BE>,
+    /// Maximum data size allowed (bytes).
+    pub o_maxdata: U64<BE>,
+    /// Section number for .tdata.
+    pub o_sntdata: U16<BE>,
+    /// Section number for .tbss.
+    pub o_sntbss: U16<BE>,
+    /// XCOFF64 flags.
+    pub o_x64flags: U16<BE>,
+    /// Reserved.
+    pub o_resv3a: U16<BE>,
+    /// Reserved.
+    pub o_resv3: [U32<BE>; 2],
+}
+
+/// Some AIX programs generate auxiliary headers for 32-bit object files that
+/// end after the data_start field.
+pub const AOUTHSZ_SHORT: u16 = 28;
+
+/// Section header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SectionHeader32 {
+    /// Section name.
+    pub s_name: [u8; 8],
+    /// Physical address.
+    pub s_paddr: U32<BE>,
+    /// Virtual address (same as physical address).
+    pub s_vaddr: U32<BE>,
+    /// Section size.
+    pub s_size: U32<BE>,
+    /// Offset in file to raw data for section.
+    pub s_scnptr: U32<BE>,
+    /// Offset in file to relocation entries for section.
+    pub s_relptr: U32<BE>,
+    /// Offset in file to line number entries for section.
+    pub s_lnnoptr: U32<BE>,
+    /// Number of relocation entries.
+    pub s_nreloc: U16<BE>,
+    /// Number of line number entries.
+    pub s_nlnno: U16<BE>,
+    /// Flags to define the section type.
+    pub s_flags: U32<BE>,
+}
+
+/// Section header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SectionHeader64 {
+    /// Section name.
+    pub s_name: [u8; 8],
+    /// Physical address.
+    pub s_paddr: U64<BE>,
+    /// Virtual address (same as physical address).
+    pub s_vaddr: U64<BE>,
+    /// Section size.
+    pub s_size: U64<BE>,
+    /// Offset in file to raw data for section.
+    pub s_scnptr: U64<BE>,
+    /// Offset in file to relocation entries for section.
+    pub s_relptr: U64<BE>,
+    /// Offset in file to line number entries for section.
+    pub s_lnnoptr: U64<BE>,
+    /// Number of relocation entries.
+    pub s_nreloc: U32<BE>,
+    /// Number of line number entries.
+    pub s_nlnno: U32<BE>,
+    /// Flags to define the section type.
+    pub s_flags: U32<BE>,
+    /// Reserved.
+    pub s_reserve: U32<BE>,
+}
+
+// Values for `s_flags`.
+//
+/// "regular" section
+pub const STYP_REG: u16 = 0x00;
+/// Specifies a pad section. A section of this type is used to provide alignment
+/// padding between sections within an XCOFF executable object file. This section
+/// header type is obsolete since padding is allowed in an XCOFF file without a
+/// corresponding pad section header.
+pub const STYP_PAD: u16 = 0x08;
+/// Specifies a DWARF debugging section, which provide source file and symbol
+/// information for the symbolic debugger.
+pub const STYP_DWARF: u16 = 0x10;
+/// Specifies an executable text (code) section. A section of this type contains
+/// the executable instructions of a program.
+pub const STYP_TEXT: u16 = 0x20;
+/// Specifies an initialized data section. A section of this type contains the
+/// initialized data and the TOC of a program.
+pub const STYP_DATA: u16 = 0x40;
+/// Specifies an uninitialized data section. A section header of this type
+/// defines the uninitialized data of a program.
+pub const STYP_BSS: u16 = 0x80;
+/// Specifies an exception section. A section of this type provides information
+/// to identify the reason that a trap or exception occurred within an executable
+/// object program.
+pub const STYP_EXCEPT: u16 = 0x0100;
+/// Specifies a comment section. A section of this type provides comments or data
+/// to special processing utility programs.
+pub const STYP_INFO: u16 = 0x0200;
+/// Specifies an initialized thread-local data section.
+pub const STYP_TDATA: u16 = 0x0400;
+/// Specifies an uninitialized thread-local data section.
+pub const STYP_TBSS: u16 = 0x0800;
+/// Specifies a loader section. A section of this type contains object file
+/// information for the system loader to load an XCOFF executable. The information
+/// includes imported symbols, exported symbols, relocation data, type-check
+/// information, and shared object names.
+pub const STYP_LOADER: u16 = 0x1000;
+/// Specifies a debug section. A section of this type contains stabstring
+/// information used by the symbolic debugger.
+pub const STYP_DEBUG: u16 = 0x2000;
+/// Specifies a type-check section. A section of this type contains
+/// parameter/argument type-check strings used by the binder.
+pub const STYP_TYPCHK: u16 = 0x4000;
+/// Specifies a relocation or line-number field overflow section. A section
+/// header of this type contains the count of relocation entries and line
+/// number entries for some other section. This section header is required
+/// when either of the counts exceeds 65,534.
+pub const STYP_OVRFLO: u16 = 0x8000;
+
+pub const SSUBTYP_DWINFO: u32 = 0x10000;
+pub const SSUBTYP_DWLINE: u32 = 0x20000;
+pub const SSUBTYP_DWPBNMS: u32 = 0x30000;
+pub const SSUBTYP_DWPBTYP: u32 = 0x40000;
+pub const SSUBTYP_DWARNGE: u32 = 0x50000;
+pub const SSUBTYP_DWABREV: u32 = 0x60000;
+pub const SSUBTYP_DWSTR: u32 = 0x70000;
+pub const SSUBTYP_DWRNGES: u32 = 0x80000;
+pub const SSUBTYP_DWLOC: u32 = 0x90000;
+pub const SSUBTYP_DWFRAME: u32 = 0xA0000;
+pub const SSUBTYP_DWMAC: u32 = 0xB0000;
+
+pub const SIZEOF_SYMBOL: usize = 18;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SymbolBytes(pub [u8; SIZEOF_SYMBOL]);
+
+/// Symbol table entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Symbol32 {
+    /// Symbol name.
+    ///
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub n_name: [u8; 8],
+    /// Symbol value; storage class-dependent.
+    pub n_value: U32<BE>,
+    /// Section number of symbol.
+    pub n_scnum: I16<BE>,
+    /// Basic and derived type specification.
+    pub n_type: U16<BE>,
+    /// Storage class of symbol.
+    pub n_sclass: u8,
+    /// Number of auxiliary entries.
+    pub n_numaux: u8,
+}
+
+/// Symbol table entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Symbol64 {
+    /// Symbol value; storage class-dependent.
+    pub n_value: U64<BE>,
+    /// Offset of the name in string table or .debug section.
+    pub n_offset: U32<BE>,
+    /// Section number of symbol.
+    pub n_scnum: I16<BE>,
+    /// Basic and derived type specification.
+    pub n_type: U16<BE>,
+    /// Storage class of symbol.
+    pub n_sclass: u8,
+    /// Number of auxiliary entries.
+    pub n_numaux: u8,
+}
+
+// Values for `n_scnum`.
+//
+/// A special symbolic debugging symbol.
+pub const N_DEBUG: i16 = -2;
+/// An absolute symbol. The symbol has a value but is not relocatable.
+pub const N_ABS: i16 = -1;
+/// An undefined external symbol.
+pub const N_UNDEF: i16 = 0;
+
+// Vlaues for `n_type`.
+//
+/// Values for visibility as they would appear when encoded in the high 4 bits
+/// of the 16-bit unsigned n_type field of symbol table entries. Valid for
+/// 32-bit XCOFF only when the o_vstamp in the auxiliary header is greater than 1.
+pub const SYM_V_MASK: u16 = 0xF000;
+pub const SYM_V_INTERNAL: u16 = 0x1000;
+pub const SYM_V_HIDDEN: u16 = 0x2000;
+pub const SYM_V_PROTECTED: u16 = 0x3000;
+pub const SYM_V_EXPORTED: u16 = 0x4000;
+
+// Values for `n_sclass`.
+//
+// Storage classes used for symbolic debugging symbols.
+//
+/// Source file name and compiler information.
+pub const C_FILE: u8 = 103;
+/// Beginning of include file.
+pub const C_BINCL: u8 = 108;
+/// Ending of include file.
+pub const C_EINCL: u8 = 109;
+/// Global variable.
+pub const C_GSYM: u8 = 128;
+/// Statically allocated symbol.
+pub const C_STSYM: u8 = 133;
+/// Beginning of common block.
+pub const C_BCOMM: u8 = 135;
+/// End of common block.
+pub const C_ECOMM: u8 = 137;
+/// Alternate entry.
+pub const C_ENTRY: u8 = 141;
+/// Beginning of static block.
+pub const C_BSTAT: u8 = 143;
+/// End of static block.
+pub const C_ESTAT: u8 = 144;
+/// Global thread-local variable.
+pub const C_GTLS: u8 = 145;
+/// Static thread-local variable.
+pub const C_STTLS: u8 = 146;
+/// DWARF section symbol.
+pub const C_DWARF: u8 = 112;
+//
+// Storage classes used for absolute symbols.
+//
+/// Automatic variable allocated on stack.
+pub const C_LSYM: u8 = 129;
+/// Argument to subroutine allocated on stack.
+pub const C_PSYM: u8 = 130;
+/// Register variable.
+pub const C_RSYM: u8 = 131;
+/// Argument to function or procedure stored in register.
+pub const C_RPSYM: u8 = 132;
+/// Local member of common block.
+pub const C_ECOML: u8 = 136;
+/// Function or procedure.
+pub const C_FUN: u8 = 142;
+//
+// Storage classes used for undefined external symbols or symbols of general sections.
+//
+/// External symbol.
+pub const C_EXT: u8 = 2;
+/// Weak external symbol.
+pub const C_WEAKEXT: u8 = 111;
+//
+// Storage classes used for symbols of general sections.
+//
+/// Symbol table entry marked for deletion.
+pub const C_NULL: u8 = 0;
+/// Static.
+pub const C_STAT: u8 = 3;
+/// Beginning or end of inner block.
+pub const C_BLOCK: u8 = 100;
+/// Beginning or end of function.
+pub const C_FCN: u8 = 101;
+/// Un-named external symbol.
+pub const C_HIDEXT: u8 = 107;
+/// Comment string in .info section.
+pub const C_INFO: u8 = 110;
+/// Declaration of object (type).
+pub const C_DECL: u8 = 140;
+//
+// Storage classes - Obsolete/Undocumented.
+//
+/// Automatic variable.
+pub const C_AUTO: u8 = 1;
+/// Register variable.
+pub const C_REG: u8 = 4;
+/// External definition.
+pub const C_EXTDEF: u8 = 5;
+/// Label.
+pub const C_LABEL: u8 = 6;
+/// Undefined label.
+pub const C_ULABEL: u8 = 7;
+/// Member of structure.
+pub const C_MOS: u8 = 8;
+/// Function argument.
+pub const C_ARG: u8 = 9;
+/// Structure tag.
+pub const C_STRTAG: u8 = 10;
+/// Member of union.
+pub const C_MOU: u8 = 11;
+/// Union tag.
+pub const C_UNTAG: u8 = 12;
+/// Type definition.
+pub const C_TPDEF: u8 = 13;
+/// Undefined static.
+pub const C_USTATIC: u8 = 14;
+/// Enumeration tag.
+pub const C_ENTAG: u8 = 15;
+/// Member of enumeration.
+pub const C_MOE: u8 = 16;
+/// Register parameter.
+pub const C_REGPARM: u8 = 17;
+/// Bit field.
+pub const C_FIELD: u8 = 18;
+/// End of structure.
+pub const C_EOS: u8 = 102;
+/// Duplicate tag.
+pub const C_ALIAS: u8 = 105;
+/// Special storage class for external.
+pub const C_HIDDEN: u8 = 106;
+/// Physical end of function.
+pub const C_EFCN: u8 = 255;
+/// Reserved.
+pub const C_TCSYM: u8 = 134;
+
+/// File Auxiliary Entry for C_FILE Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileAux32 {
+    /// The source file name or compiler-related string.
+    ///
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub x_fname: [u8; 8],
+    /// Pad size for file name.
+    pub x_fpad: [u8; 6],
+    /// The source-file string type.
+    pub x_ftype: u8,
+    /// Reserved.
+    pub x_freserve: [u8; 3],
+}
+
+/// File Auxiliary Entry for C_FILE Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileAux64 {
+    /// The source file name or compiler-related string.
+    ///
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub x_fname: [u8; 8],
+    /// Pad size for file name.
+    pub x_fpad: [u8; 6],
+    /// The source-file string type.
+    pub x_ftype: u8,
+    /// Reserved.
+    pub x_freserve: [u8; 2],
+    /// Specifies the type of auxiliary entry. Contains _AUX_FILE for this auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+// Values for `x_ftype`.
+//
+/// Specifies the source-file name.
+pub const XFT_FN: u8 = 0;
+/// Specifies the compiler time stamp.
+pub const XFT_CT: u8 = 1;
+/// Specifies the compiler version number.
+pub const XFT_CV: u8 = 2;
+/// Specifies compiler-defined information.
+pub const XFT_CD: u8 = 128;
+
+/// Csect auxiliary entry for C_EXT, C_WEAKEXT, and C_HIDEXT symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct CsectAux32 {
+    /// Section length.
+    pub x_scnlen: U32<BE>,
+    /// Offset of parameter type-check hash in .typchk section.
+    pub x_parmhash: U32<BE>,
+    /// .typchk section number.
+    pub x_snhash: U16<BE>,
+    /// Symbol alignment and type.
+    pub x_smtyp: u8,
+    /// Storage mapping class.
+    pub x_smclas: u8,
+    /// Reserved.
+    pub x_stab: U32<BE>,
+    /// x_snstab.
+    pub x_snstab: U16<BE>,
+}
+
+/// Csect auxiliary entry for C_EXT, C_WEAKEXT, and C_HIDEXT symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct CsectAux64 {
+    /// Low 4 bytes of section length.
+    pub x_scnlen_lo: U32<BE>,
+    /// Offset of parameter type-check hash in .typchk section.
+    pub x_parmhash: U32<BE>,
+    /// .typchk section number.
+    pub x_snhash: U16<BE>,
+    /// Symbol alignment and type.
+    pub x_smtyp: u8,
+    /// Storage mapping class.
+    pub x_smclas: u8,
+    /// High 4 bytes of section length.
+    pub x_scnlen_hi: U32<BE>,
+    /// Reserved.
+    pub pad: u8,
+    /// Contains _AUX_CSECT; indicates type of auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+// Values for `x_smtyp`.
+//
+/// External reference.
+pub const XTY_ER: u8 = 0;
+/// Csect definition for initialized storage.
+pub const XTY_SD: u8 = 1;
+/// Defines an entry point to an initialized csect.
+pub const XTY_LD: u8 = 2;
+/// Common csect definition. For uninitialized storage.
+pub const XTY_CM: u8 = 3;
+
+// Values for `x_smclas`.
+//
+// READ ONLY CLASSES
+//
+/// Program Code
+pub const XMC_PR: u8 = 0;
+/// Read Only Constant
+pub const XMC_RO: u8 = 1;
+/// Debug Dictionary Table
+pub const XMC_DB: u8 = 2;
+/// Global Linkage (Interfile Interface Code)
+pub const XMC_GL: u8 = 6;
+/// Extended Operation (Pseudo Machine Instruction)
+pub const XMC_XO: u8 = 7;
+/// Supervisor Call (32-bit process only)
+pub const XMC_SV: u8 = 8;
+/// Supervisor Call for 64-bit process
+pub const XMC_SV64: u8 = 17;
+/// Supervisor Call for both 32- and 64-bit processes
+pub const XMC_SV3264: u8 = 18;
+/// Traceback Index csect
+pub const XMC_TI: u8 = 12;
+/// Traceback Table csect
+pub const XMC_TB: u8 = 13;
+//
+// READ WRITE CLASSES
+//
+/// Read Write Data
+pub const XMC_RW: u8 = 5;
+/// TOC Anchor for TOC Addressability
+pub const XMC_TC0: u8 = 15;
+/// General TOC item
+pub const XMC_TC: u8 = 3;
+/// Scalar data item in the TOC
+pub const XMC_TD: u8 = 16;
+/// Descriptor csect
+pub const XMC_DS: u8 = 10;
+/// Unclassified - Treated as Read Write
+pub const XMC_UA: u8 = 4;
+/// BSS class (uninitialized static internal)
+pub const XMC_BS: u8 = 9;
+/// Un-named Fortran Common
+pub const XMC_UC: u8 = 11;
+/// Initialized thread-local variable
+pub const XMC_TL: u8 = 20;
+/// Uninitialized thread-local variable
+pub const XMC_UL: u8 = 21;
+/// Symbol mapped at the end of TOC
+pub const XMC_TE: u8 = 22;
+
+/// Function auxiliary entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FunAux32 {
+    /// File offset to exception table entry.
+    pub x_exptr: U32<BE>,
+    /// Size of function in bytes.
+    pub x_fsize: U32<BE>,
+    /// File pointer to line number
+    pub x_lnnoptr: U32<BE>,
+    /// Symbol table index of next entry beyond this function.
+    pub x_endndx: U32<BE>,
+    /// Pad
+    pub pad: U16<BE>,
+}
+
+/// Function auxiliary entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FunAux64 {
+    /// File pointer to line number
+    pub x_lnnoptr: U64<BE>,
+    /// Size of function in bytes.
+    pub x_fsize: U32<BE>,
+    /// Symbol table index of next entry beyond this function.
+    pub x_endndx: U32<BE>,
+    /// Pad
+    pub pad: u8,
+    /// Contains _AUX_FCN; Type of auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+/// Exception auxiliary entry. (XCOFF64 only)
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ExpAux {
+    /// File offset to exception table entry.
+    pub x_exptr: U64<BE>,
+    /// Size of function in bytes.
+    pub x_fsize: U32<BE>,
+    /// Symbol table index of next entry beyond this function.
+    pub x_endndx: U32<BE>,
+    /// Pad
+    pub pad: u8,
+    /// Contains _AUX_EXCEPT; Type of auxiliary entry
+    pub x_auxtype: u8,
+}
+
+/// Block auxiliary entry for the C_BLOCK and C_FCN Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct BlockAux32 {
+    /// Reserved.
+    pub pad: [u8; 2],
+    /// High-order 2 bytes of the source line number.
+    pub x_lnnohi: U16<BE>,
+    /// Low-order 2 bytes of the source line number.
+    pub x_lnnolo: U16<BE>,
+    /// Reserved.
+    pub pad2: [u8; 12],
+}
+
+/// Block auxiliary entry for the C_BLOCK and C_FCN Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct BlockAux64 {
+    /// Source line number.
+    pub x_lnno: U32<BE>,
+    /// Reserved.
+    pub pad: [u8; 13],
+    /// Contains _AUX_SYM; Type of auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+/// Section auxiliary entry for the C_STAT Symbol. (XCOFF32 Only)
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct StatAux {
+    /// Section length.
+    pub x_scnlen: U32<BE>,
+    /// Number of relocation entries.
+    pub x_nreloc: U16<BE>,
+    /// Number of line numbers.
+    pub x_nlinno: U16<BE>,
+    /// Reserved.
+    pub pad: [u8; 10],
+}
+
+/// Section auxiliary entry Format for C_DWARF symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DwarfAux32 {
+    /// Length of portion of section represented by symbol.
+    pub x_scnlen: U32<BE>,
+    /// Reserved.
+    pub pad: [u8; 4],
+    /// Number of relocation entries in section.
+    pub x_nreloc: U32<BE>,
+    /// Reserved.
+    pub pad2: [u8; 6],
+}
+
+/// Section auxiliary entry Format for C_DWARF symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DwarfAux64 {
+    /// Length of portion of section represented by symbol.
+    pub x_scnlen: U64<BE>,
+    /// Number of relocation entries in section.
+    pub x_nreloc: U64<BE>,
+    /// Reserved.
+    pub pad: u8,
+    /// Contains _AUX_SECT; Type of Auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+// Values for `x_auxtype`
+//
+/// Identifies an exception auxiliary entry.
+pub const AUX_EXCEPT: u8 = 255;
+/// Identifies a function auxiliary entry.
+pub const AUX_FCN: u8 = 254;
+/// Identifies a symbol auxiliary entry.
+pub const AUX_SYM: u8 = 253;
+/// Identifies a file auxiliary entry.
+pub const AUX_FILE: u8 = 252;
+/// Identifies a csect auxiliary entry.
+pub const AUX_CSECT: u8 = 251;
+/// Identifies a SECT auxiliary entry.
+pub const AUX_SECT: u8 = 250;
+
+/// Relocation table entry
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rel32 {
+    /// Virtual address (position) in section to be relocated.
+    pub r_vaddr: U32<BE>,
+    /// Symbol table index of item that is referenced.
+    pub r_symndx: U32<BE>,
+    /// Relocation size and information.
+    pub r_rsize: u8,
+    /// Relocation type.
+    pub r_rtype: u8,
+}
+
+/// Relocation table entry
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rel64 {
+    /// Virtual address (position) in section to be relocated.
+    pub r_vaddr: U64<BE>,
+    /// Symbol table index of item that is referenced.
+    pub r_symndx: U32<BE>,
+    /// Relocation size and information.
+    pub r_rsize: u8,
+    /// Relocation type.
+    pub r_rtype: u8,
+}
+
+// Values for `r_rtype`.
+//
+/// Positive relocation.
+pub const R_POS: u8 = 0x00;
+/// Positive indirect load relocation.
+pub const R_RL: u8 = 0x0c;
+/// Positive load address relocation. Modifiable instruction.
+pub const R_RLA: u8 = 0x0d;
+/// Negative relocation.
+pub const R_NEG: u8 = 0x01;
+/// Relative to self relocation.
+pub const R_REL: u8 = 0x02;
+/// Relative to the TOC relocation.
+pub const R_TOC: u8 = 0x03;
+/// TOC relative indirect load relocation.
+pub const R_TRL: u8 = 0x12;
+/// Relative to the TOC or to the thread-local storage base relocation.
+pub const R_TRLA: u8 = 0x13;
+/// Global linkage-external TOC address relocation.
+pub const R_GL: u8 = 0x05;
+/// Local object TOC address relocation.
+pub const R_TCL: u8 = 0x06;
+/// A non-relocating relocation.
+pub const R_REF: u8 = 0x0f;
+/// Branch absolute relocation. References a non-modifiable instruction.
+pub const R_BA: u8 = 0x08;
+/// Branch relative to self relocation. References a non-modifiable instruction.
+pub const R_BR: u8 = 0x0a;
+/// Branch absolute relocation. References a modifiable instruction.
+pub const R_RBA: u8 = 0x18;
+/// Branch relative to self relocation. References a modifiable instruction.
+pub const R_RBR: u8 = 0x1a;
+/// General-dynamic reference to TLS symbol.
+pub const R_TLS: u8 = 0x20;
+/// Initial-exec reference to TLS symbol.
+pub const R_TLS_IE: u8 = 0x21;
+/// Local-dynamic reference to TLS symbol.
+pub const R_TLS_LD: u8 = 0x22;
+/// Local-exec reference to TLS symbol.
+pub const R_TLS_LE: u8 = 0x23;
+/// Module reference to TLS.
+pub const R_TLSM: u8 = 0x24;
+/// Module reference to the local TLS storage.
+pub const R_TLSML: u8 = 0x25;
+/// Relative to TOC upper.
+pub const R_TOCU: u8 = 0x30;
+/// Relative to TOC lower.
+pub const R_TOCL: u8 = 0x31;
+
+unsafe_impl_pod!(
+    FileHeader32,
+    FileHeader64,
+    AuxHeader32,
+    AuxHeader64,
+    SectionHeader32,
+    SectionHeader64,
+    SymbolBytes,
+    Symbol32,
+    Symbol64,
+    FileAux32,
+    FileAux64,
+    CsectAux32,
+    CsectAux64,
+    FunAux32,
+    FunAux64,
+    ExpAux,
+    BlockAux32,
+    BlockAux64,
+    StatAux,
+    DwarfAux32,
+    DwarfAux64,
+    Rel32,
+    Rel64,
+);