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output_aout.h
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output_aout.h
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/* output_aout.h header file for a.out objects */
/* (c) in 2008,2020 by Frank Wille */
#include "stabs.h"
/* a.out header */
struct aout_hdr {
uint8_t a_midmag[4];
uint8_t a_text[4];
uint8_t a_data[4];
uint8_t a_bss[4];
uint8_t a_syms[4];
uint8_t a_entry[4];
uint8_t a_trsize[4];
uint8_t a_drsize[4];
};
/* a_magic */
#define OMAGIC 0407 /* old impure format */
#define NMAGIC 0410 /* read-only text */
#define ZMAGIC 0413 /* demand load format */
#define QMAGIC 0314 /* not supported */
/* a_mid - machine id */
#define MID_SUN010 1 /* sun 68010/68020 binary */
#define MID_SUN020 2 /* sun 68020-only binary */
#define MID_PC386 100 /* 386 PC binary. (so quoth BFD) */
#define MID_HP200 200 /* hp200 (68010) BSD binary */
#define MID_I386 134 /* i386 BSD binary */
#define MID_M68K 135 /* m68k BSD binary with 8K page sizes */
#define MID_M68K4K 136 /* m68k BSD binary with 4K page sizes */
#define MID_NS32532 137 /* ns32532 */
#define MID_SPARC 138 /* sparc */
#define MID_PMAX 139 /* pmax */
#define MID_VAX1K 140 /* vax 1K page size binaries */
#define MID_ALPHA 141 /* Alpha BSD binary */
#define MID_MIPS 142 /* big-endian MIPS */
#define MID_ARM6 143 /* ARM6 */
#define MID_SH3 145 /* SH3 */
#define MID_POWERPC 149 /* big-endian PowerPC */
#define MID_VAX 150 /* vax */
#define MID_SPARC64 151 /* LP64 sparc */
#define MID_HP300 300 /* hp300 (68020+68881) BSD binary */
#define MID_HPUX 0x20C /* hp200/300 HP-UX binary */
#define MID_HPUX800 0x20B /* hp800 HP-UX binary */
/* a_flags */
#define EX_DYNAMIC 0x20
#define EX_PIC 0x10
#define EX_DPMASK 0x30
/* a_midmag macros */
#define SETMIDMAG(a,mag,mid,flag) setval(1,(a)->a_midmag,4, \
((flag)&0x3f)<<26|((mid)&0x3ff)<<16|((mag)&0xffff))
/* Relocation info structures */
struct relocation_info {
uint8_t r_address[4];
uint8_t r_info[4];
};
#define RELB_symbolnum 0 /* ordinal number of add symbol */
#define RELS_symbolnum 24
#define RELB_reloc 24 /* the whole reloc field */
#define RELS_reloc 8
/* standard relocs: M68k, x86, ... */
#define RSTDB_pcrel 24 /* 1 if value should be pc-relative */
#define RSTDS_pcrel 1
#define RSTDB_length 25 /* log base 2 of value's width */
#define RSTDS_length 2
#define RSTDB_extern 27 /* 1 if need to add symbol to value */
#define RSTDS_extern 1
#define RSTDB_baserel 28 /* linkage table relative */
#define RSTDS_baserel 1
#define RSTDB_jmptable 29 /* relocate to jump table */
#define RSTDS_jmptable 1
#define RSTDB_relative 30 /* load address relative */
#define RSTDS_relative 1
#define RSTDB_copy 31 /* run time copy */
#define RSTDS_copy 1
/* vasm specific - used to generate a.out files */
#define STRHTABSIZE 0x10000
#define SYMHTABSIZE 0x10000
struct StrTabNode {
struct node n;
struct StrTabNode *hashchain;
char *str;
uint32_t offset;
};
struct StrTabList {
struct list l;
struct StrTabNode **hashtab;
uint32_t nextoffset;
};
struct SymbolNode {
struct node n;
struct SymbolNode *hashchain;
char *name;
struct nlist32 s;
uint32_t index;
};
struct SymTabList {
struct list l;
struct SymbolNode **hashtab;
uint32_t nextindex;
};
struct RelocNode {
struct node n;
struct relocation_info r;
};
#if defined(VASM_CPU_M68K)
/* MID defined in cpus/m68k/cpu.h */
#elif defined(VASM_CPU_PPC)
#define MID MID_POWERPC
#elif defined(VASM_CPU_ARM)
#define MID MID_ARM6
#elif defined(VASM_CPU_X86)
#define MID MID_PC386
#elif defined(VASM_CPU_JAGRISC)
#define MID (0)
#endif