mirror of
https://github.com/DoctorWkt/unix-jun72.git
synced 2026-01-11 23:53:34 +00:00
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
|
|
* aout.h - parse and load the contents of a UNIX a.out file, for several
|
|
* flavours of PDP-11 UNIX
|
|
*
|
|
* $Revision: 1.7 $ $Date: 2008/05/06 01:09:01 $
|
|
*/
|
|
#include <ctype.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#define EIGHT_K 8192
|
|
#define PDP_MEM_SIZE 65536 /* Size of inst-space and data-space */
|
|
|
|
/* UNIX magic numbers for the a.out header */
|
|
#define V1_NORMAL 0405 /* normal: 1st Edition, six words long */
|
|
#define ANY_NORMAL 0407 /* normal: V5,V6,V7,2.11BSD */
|
|
#define ANY_ROTEXT 0410 /* read-only text: V5,V6,V7,2.11BSD */
|
|
#define ANY_SPLITID 0411 /* seperated I&D: V5,V6,V7,2.11BSD */
|
|
#define BSD_OVERLAY 0430 /* 2.11BSD overlay, non-separate */
|
|
#define BSD_ROVERLAY 0431 /* 2.11BSD overlay, separate */
|
|
#define ANY_SCRIPT 020443 /* Shell script, i.e #! */
|
|
#define A68_MAGIC 0 /* Algol68 binaries have these magic nums */
|
|
#define A68_DATA 0107116 /* Algol68 binaries have these magic nums */
|
|
|
|
#define UNKNOWN_AOUT 034567 /* An unknown a.out header */
|
|
|
|
/* Which version of UNIX this a.out comes from */
|
|
#define IS_UNKNOWN 0
|
|
#define IS_V1 1
|
|
#define IS_V2 2
|
|
#define IS_V3 3
|
|
#define IS_V4 4
|
|
#define IS_V5 5
|
|
#define IS_V6 6
|
|
#define IS_V7 7
|
|
#define IS_A68 68
|
|
#define IS_29BSD 29
|
|
#define IS_211BSD 211
|
|
|
|
/* a.out header for nearly all UNIX flavours */
|
|
struct exec {
|
|
u_int16_t a_magic; /* magic number */
|
|
u_int16_t a_text; /* size of text segment */
|
|
u_int16_t a_data; /* size of initialised data */
|
|
u_int16_t a_bss; /* size of initialised bss */
|
|
u_int16_t a_syms; /* size of symbol table */
|
|
u_int16_t a_entry; /* entry point */
|
|
u_int16_t a_unused; /* unused */
|
|
u_int16_t a_flag; /* relocation info stripped */
|
|
/* 16 bytes up to here */
|
|
|
|
/* 2.11BSD overlay files have the following */
|
|
#define NOVL 15
|
|
int16_t max_ovl; /* maximum overlay size */
|
|
u_int16_t ov_siz[NOVL]; /* size of the i'th overlay */
|
|
/* Note that if the file isn't a 2.11BSD */
|
|
/* overlay, we have to rewind to undo */
|
|
/* the read of this section */
|
|
};
|
|
|
|
/* Symbol table entries for 0407 binaries */
|
|
struct sym0407 {
|
|
u_int8_t name[8];
|
|
u_int16_t type;
|
|
u_int16_t addr;
|
|
};
|
|
|
|
#define ASYM_UNDEFINED 00
|
|
#define ASYM_ABSOLUTE 01
|
|
#define ASYM_TEXT 02
|
|
#define ASYM_DATA 03
|
|
#define ASYM_BSS 04
|
|
#define ASYM_UNDEFEXT 40
|
|
#define ASYM_ABSEXT 41
|
|
#define ASYM_TEXTEXT 42
|
|
#define ASYM_DATAEXT 43
|
|
#define ASYM_BSSDEXT 44
|
|
|
|
/*
|
|
* Because V5, V6, V7 and 2.11BSD share several magic numbers in their a.out
|
|
* headers, we must distinguish them so as to set up the correct emulated
|
|
* environment. This is done by observing the differences in their crt0.s
|
|
* code: they all differ at position 021
|
|
*/
|
|
#define a_magic2 ov_siz[0]
|
|
#define V2_M2 0177304 /* Doesn't apply to all, tho */
|
|
#define V6_M2 0010600
|
|
#define V7_M2 0016600
|
|
#define BSD_M2 0162706
|
|
|
|
|
|
/*
|
|
* Some syscalls pass arguments in registers, some in words following the
|
|
* trap instruction. For each Unix version, we keep an array of syscall
|
|
* names, and the number of words following the trap
|
|
*/
|
|
struct syscallinfo {
|
|
char *name;
|
|
int numwords;
|
|
};
|
|
|
|
/*
|
|
* We try to infer symbols based on branch addresses, jsr addresses etc. We
|
|
* keep two lists, instruction symbols and data symbols. Each one is kept in
|
|
* this struct.
|
|
*/
|
|
struct symbol {
|
|
char *name;
|
|
int type;
|
|
int size; /* # bytes, used by SYM_JSRTEXT and SYM_JSRDATA */
|
|
};
|
|
|
|
/* Symbol types */
|
|
#define SYM_BRANCH 0
|
|
#define SYM_FUNCTION 1
|
|
#define SYM_DATA 2
|
|
#define SYM_JSRTEXT 3 /* Ascii string following jsr r5,xxx */
|
|
#define SYM_JSRDATA 4 /* Binary data following jsr r5,xxx */
|