// 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
)
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