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Diffstat (limited to 'src/internal/xcoff/xcoff.go')
| -rw-r--r-- | src/internal/xcoff/xcoff.go | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/src/internal/xcoff/xcoff.go b/src/internal/xcoff/xcoff.go new file mode 100644 index 0000000..f8465d7 --- /dev/null +++ b/src/internal/xcoff/xcoff.go @@ -0,0 +1,367 @@ +// 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 int32 // Time and date of file creation + Fsymptr uint32 // Byte offset to symbol table start + Fnsyms int32 // 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 int32 // 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 int32 // 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 int16 // Section number of symbol + Ntype uint16 // Basic and derived type specification + Nsclass int8 // Storage class of symbol + Nnumaux int8 // Number of auxiliary entries +} + +type SymEnt64 struct { + Nvalue uint64 // Symbol value + Noffset uint32 // Offset of the name in string table or .debug section + Nscnum int16 // Section number of symbol + Ntype uint16 // Basic and derived type specification + Nsclass int8 // Storage class of symbol + Nnumaux int8 // 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 int32 // 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 int32 // 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 int32 // Loader section version number + Lnsyms int32 // Number of symbol table entries + Lnreloc int32 // Number of relocation table entries + Listlen uint32 // Length of import file ID string table + Lnimpid int32 // 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 int32 // Loader section version number + Lnsyms int32 // Number of symbol table entries + Lnreloc int32 // Number of relocation table entries + Listlen uint32 // Length of import file ID string table + Lnimpid int32 // 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 int16 // Section number containing symbol + Lsmtype int8 // Symbol type, export, import flags + Lsmclas int8 // Symbol storage class + Lifile int32 // 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 int16 // Section number containing symbol + Lsmtype int8 // Symbol type, export, import flags + Lsmclas int8 // Symbol storage class + Lifile int32 // 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 +) |