// Copyright 2018 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package xcoff // File Header. type FileHeader32 struct { Fmagic uint16 // Target machine Fnscns uint16 // Number of sections Ftimedat uint32 // Time and date of file creation Fsymptr uint32 // Byte offset to symbol table start Fnsyms uint32 // Number of entries in symbol table Fopthdr uint16 // Number of bytes in optional header Fflags uint16 // Flags } type FileHeader64 struct { Fmagic uint16 // Target machine Fnscns uint16 // Number of sections Ftimedat uint32 // Time and date of file creation Fsymptr uint64 // Byte offset to symbol table start Fopthdr uint16 // Number of bytes in optional header Fflags uint16 // Flags Fnsyms uint32 // Number of entries in symbol table } const ( FILHSZ_32 = 20 FILHSZ_64 = 24 ) const ( U802TOCMAGIC = 0737 // AIX 32-bit XCOFF U64_TOCMAGIC = 0767 // AIX 64-bit XCOFF ) // Flags that describe the type of the object file. const ( F_RELFLG = 0x0001 F_EXEC = 0x0002 F_LNNO = 0x0004 F_FDPR_PROF = 0x0010 F_FDPR_OPTI = 0x0020 F_DSA = 0x0040 F_VARPG = 0x0100 F_DYNLOAD = 0x1000 F_SHROBJ = 0x2000 F_LOADONLY = 0x4000 ) // Section Header. type SectionHeader32 struct { Sname [8]byte // Section name Spaddr uint32 // Physical address Svaddr uint32 // Virtual address Ssize uint32 // Section size Sscnptr uint32 // Offset in file to raw data for section Srelptr uint32 // Offset in file to relocation entries for section Slnnoptr uint32 // Offset in file to line number entries for section Snreloc uint16 // Number of relocation entries Snlnno uint16 // Number of line number entries Sflags uint32 // Flags to define the section type } type SectionHeader64 struct { Sname [8]byte // Section name Spaddr uint64 // Physical address Svaddr uint64 // Virtual address Ssize uint64 // Section size Sscnptr uint64 // Offset in file to raw data for section Srelptr uint64 // Offset in file to relocation entries for section Slnnoptr uint64 // Offset in file to line number entries for section Snreloc uint32 // Number of relocation entries Snlnno uint32 // Number of line number entries Sflags uint32 // Flags to define the section type Spad uint32 // Needs to be 72 bytes long } // Flags defining the section type. const ( STYP_DWARF = 0x0010 STYP_TEXT = 0x0020 STYP_DATA = 0x0040 STYP_BSS = 0x0080 STYP_EXCEPT = 0x0100 STYP_INFO = 0x0200 STYP_TDATA = 0x0400 STYP_TBSS = 0x0800 STYP_LOADER = 0x1000 STYP_DEBUG = 0x2000 STYP_TYPCHK = 0x4000 STYP_OVRFLO = 0x8000 ) const ( SSUBTYP_DWINFO = 0x10000 // DWARF info section SSUBTYP_DWLINE = 0x20000 // DWARF line-number section SSUBTYP_DWPBNMS = 0x30000 // DWARF public names section SSUBTYP_DWPBTYP = 0x40000 // DWARF public types section SSUBTYP_DWARNGE = 0x50000 // DWARF aranges section SSUBTYP_DWABREV = 0x60000 // DWARF abbreviation section SSUBTYP_DWSTR = 0x70000 // DWARF strings section SSUBTYP_DWRNGES = 0x80000 // DWARF ranges section SSUBTYP_DWLOC = 0x90000 // DWARF location lists section SSUBTYP_DWFRAME = 0xA0000 // DWARF frames section SSUBTYP_DWMAC = 0xB0000 // DWARF macros section ) // Symbol Table Entry. type SymEnt32 struct { Nname [8]byte // Symbol name Nvalue uint32 // Symbol value Nscnum uint16 // Section number of symbol Ntype uint16 // Basic and derived type specification Nsclass uint8 // Storage class of symbol Nnumaux uint8 // Number of auxiliary entries } type SymEnt64 struct { Nvalue uint64 // Symbol value Noffset uint32 // Offset of the name in string table or .debug section Nscnum uint16 // Section number of symbol Ntype uint16 // Basic and derived type specification Nsclass uint8 // Storage class of symbol Nnumaux uint8 // Number of auxiliary entries } const SYMESZ = 18 const ( // Nscnum N_DEBUG = -2 N_ABS = -1 N_UNDEF = 0 //Ntype SYM_V_INTERNAL = 0x1000 SYM_V_HIDDEN = 0x2000 SYM_V_PROTECTED = 0x3000 SYM_V_EXPORTED = 0x4000 SYM_TYPE_FUNC = 0x0020 // is function ) // Storage Class. const ( C_NULL = 0 // Symbol table entry marked for deletion C_EXT = 2 // External symbol C_STAT = 3 // Static symbol C_BLOCK = 100 // Beginning or end of inner block C_FCN = 101 // Beginning or end of function C_FILE = 103 // Source file name and compiler information C_HIDEXT = 107 // Unnamed external symbol C_BINCL = 108 // Beginning of include file C_EINCL = 109 // End of include file C_WEAKEXT = 111 // Weak external symbol C_DWARF = 112 // DWARF symbol C_GSYM = 128 // Global variable C_LSYM = 129 // Automatic variable allocated on stack C_PSYM = 130 // Argument to subroutine allocated on stack C_RSYM = 131 // Register variable C_RPSYM = 132 // Argument to function or procedure stored in register C_STSYM = 133 // Statically allocated symbol C_BCOMM = 135 // Beginning of common block C_ECOML = 136 // Local member of common block C_ECOMM = 137 // End of common block C_DECL = 140 // Declaration of object C_ENTRY = 141 // Alternate entry C_FUN = 142 // Function or procedure C_BSTAT = 143 // Beginning of static block C_ESTAT = 144 // End of static block C_GTLS = 145 // Global thread-local variable C_STTLS = 146 // Static thread-local variable ) // File Auxiliary Entry type AuxFile64 struct { Xfname [8]byte // Name or offset inside string table Xftype uint8 // Source file string type Xauxtype uint8 // Type of auxiliary entry } // Function Auxiliary Entry type AuxFcn32 struct { Xexptr uint32 // File offset to exception table entry Xfsize uint32 // Size of function in bytes Xlnnoptr uint32 // File pointer to line number Xendndx uint32 // Symbol table index of next entry Xpad uint16 // Unused } type AuxFcn64 struct { Xlnnoptr uint64 // File pointer to line number Xfsize uint32 // Size of function in bytes Xendndx uint32 // Symbol table index of next entry Xpad uint8 // Unused Xauxtype uint8 // Type of auxiliary entry } type AuxSect64 struct { Xscnlen uint64 // section length Xnreloc uint64 // Num RLDs pad uint8 Xauxtype uint8 // Type of auxiliary entry } // csect Auxiliary Entry. type AuxCSect32 struct { Xscnlen uint32 // Length or symbol table index Xparmhash uint32 // Offset of parameter type-check string Xsnhash uint16 // .typchk section number Xsmtyp uint8 // Symbol alignment and type Xsmclas uint8 // Storage-mapping class Xstab uint32 // Reserved Xsnstab uint16 // Reserved } type AuxCSect64 struct { Xscnlenlo uint32 // Lower 4 bytes of length or symbol table index Xparmhash uint32 // Offset of parameter type-check string Xsnhash uint16 // .typchk section number Xsmtyp uint8 // Symbol alignment and type Xsmclas uint8 // Storage-mapping class Xscnlenhi uint32 // Upper 4 bytes of length or symbol table index Xpad uint8 // Unused Xauxtype uint8 // Type of auxiliary entry } // Auxiliary type const ( _AUX_EXCEPT = 255 _AUX_FCN = 254 _AUX_SYM = 253 _AUX_FILE = 252 _AUX_CSECT = 251 _AUX_SECT = 250 ) // Symbol type field. const ( XTY_ER = 0 // External reference XTY_SD = 1 // Section definition XTY_LD = 2 // Label definition XTY_CM = 3 // Common csect definition ) // Defines for File auxiliary definitions: x_ftype field of x_file const ( XFT_FN = 0 // Source File Name XFT_CT = 1 // Compile Time Stamp XFT_CV = 2 // Compiler Version Number XFT_CD = 128 // Compiler Defined Information ) // Storage-mapping class. const ( XMC_PR = 0 // Program code XMC_RO = 1 // Read-only constant XMC_DB = 2 // Debug dictionary table XMC_TC = 3 // TOC entry XMC_UA = 4 // Unclassified XMC_RW = 5 // Read/Write data XMC_GL = 6 // Global linkage XMC_XO = 7 // Extended operation XMC_SV = 8 // 32-bit supervisor call descriptor XMC_BS = 9 // BSS class XMC_DS = 10 // Function descriptor XMC_UC = 11 // Unnamed FORTRAN common XMC_TC0 = 15 // TOC anchor XMC_TD = 16 // Scalar data entry in the TOC XMC_SV64 = 17 // 64-bit supervisor call descriptor XMC_SV3264 = 18 // Supervisor call descriptor for both 32-bit and 64-bit XMC_TL = 20 // Read/Write thread-local data XMC_UL = 21 // Read/Write thread-local data (.tbss) XMC_TE = 22 // TOC entry ) // Loader Header. type LoaderHeader32 struct { Lversion uint32 // Loader section version number Lnsyms uint32 // Number of symbol table entries Lnreloc uint32 // Number of relocation table entries Listlen uint32 // Length of import file ID string table Lnimpid uint32 // Number of import file IDs Limpoff uint32 // Offset to start of import file IDs Lstlen uint32 // Length of string table Lstoff uint32 // Offset to start of string table } type LoaderHeader64 struct { Lversion uint32 // Loader section version number Lnsyms uint32 // Number of symbol table entries Lnreloc uint32 // Number of relocation table entries Listlen uint32 // Length of import file ID string table Lnimpid uint32 // Number of import file IDs Lstlen uint32 // Length of string table Limpoff uint64 // Offset to start of import file IDs Lstoff uint64 // Offset to start of string table Lsymoff uint64 // Offset to start of symbol table Lrldoff uint64 // Offset to start of relocation entries } const ( LDHDRSZ_32 = 32 LDHDRSZ_64 = 56 ) // Loader Symbol. type LoaderSymbol32 struct { Lname [8]byte // Symbol name or byte offset into string table Lvalue uint32 // Address field Lscnum uint16 // Section number containing symbol Lsmtype uint8 // Symbol type, export, import flags Lsmclas uint8 // Symbol storage class Lifile uint32 // Import file ID; ordinal of import file IDs Lparm uint32 // Parameter type-check field } type LoaderSymbol64 struct { Lvalue uint64 // Address field Loffset uint32 // Byte offset into string table of symbol name Lscnum uint16 // Section number containing symbol Lsmtype uint8 // Symbol type, export, import flags Lsmclas uint8 // Symbol storage class Lifile uint32 // Import file ID; ordinal of import file IDs Lparm uint32 // Parameter type-check field } type Reloc32 struct { Rvaddr uint32 // (virtual) address of reference Rsymndx uint32 // Index into symbol table Rsize uint8 // Sign and reloc bit len Rtype uint8 // Toc relocation type } type Reloc64 struct { Rvaddr uint64 // (virtual) address of reference Rsymndx uint32 // Index into symbol table Rsize uint8 // Sign and reloc bit len Rtype uint8 // Toc relocation type } const ( R_POS = 0x00 // A(sym) Positive Relocation R_NEG = 0x01 // -A(sym) Negative Relocation R_REL = 0x02 // A(sym-*) Relative to self R_TOC = 0x03 // A(sym-TOC) Relative to TOC R_TRL = 0x12 // A(sym-TOC) TOC Relative indirect load. R_TRLA = 0x13 // A(sym-TOC) TOC Rel load address. modifiable inst R_GL = 0x05 // A(external TOC of sym) Global Linkage R_TCL = 0x06 // A(local TOC of sym) Local object TOC address R_RL = 0x0C // A(sym) Pos indirect load. modifiable instruction R_RLA = 0x0D // A(sym) Pos Load Address. modifiable instruction R_REF = 0x0F // AL0(sym) Non relocating ref. No garbage collect R_BA = 0x08 // A(sym) Branch absolute. Cannot modify instruction R_RBA = 0x18 // A(sym) Branch absolute. modifiable instruction R_BR = 0x0A // A(sym-*) Branch rel to self. non modifiable R_RBR = 0x1A // A(sym-*) Branch rel to self. modifiable instr R_TLS = 0x20 // General-dynamic reference to TLS symbol R_TLS_IE = 0x21 // Initial-exec reference to TLS symbol R_TLS_LD = 0x22 // Local-dynamic reference to TLS symbol R_TLS_LE = 0x23 // Local-exec reference to TLS symbol R_TLSM = 0x24 // Module reference to TLS symbol R_TLSML = 0x25 // Module reference to local (own) module R_TOCU = 0x30 // Relative to TOC - high order bits R_TOCL = 0x31 // Relative to TOC - low order bits )