//
-// RLN - Reboot's Linker for the Atari Jaguar Console System
-// RLN.H - Application Header
-// Copyright (C) 199x Allan K. Pratt, 2011 Reboot & Friends
+// RLN - Renamed Linker for the Atari Jaguar console system
+// Copyright (C) 199x Allan K. Pratt, 2011-2021 Reboot & Friends
//
#ifndef __RLN_H__
#define __RLN_H__
-// Required Include Files
-
-// Macro Definitions
-
-// Requirements for Windows Compilation
#ifdef WIN32
//#define _OPEN_FLAGS _O_BINARY|_O_RDWR
#include <setjmp.h>
#endif
-// Requirements for Mac OS-X or Linux Compilation
-
#ifdef __GCCUNIX__
//#define _OPEN_FLAGS O_RDWR
#define _OPEN_FLAGS O_RDONLY
#endif
#define MAJOR 1 // Major version number
-#define MINOR 3 // Minor version number
-#define PATCH 6 // Patch release number
+#define MINOR 7 // Minor version number
+#define PATCH 4 // Patch release number
#ifdef WIN32
#define PLATFORM "Win32" // Release platform - Windows
#define OST_BLOCK 0x400000 // Output symbol table block (4MB)
#define DSTSEG_D 1 // Include file destination seg (DATA)
#define DSTSEG_T 2 // Include file destination seg (TEXT)
-#define MAXARGS 256 // Max number of args in a command file
+#define MAXARGS 4096 // Max number of args in a command file
// Headers
// Rather than rely on dodgy compilers for something that's now a C99 standard,
// let's do this:
#include <stdint.h>
+#include <dirent.h>
+
+// Alcyon object file header structures.
+//
+// Same as an Atari ST/GEMDOS/TOS executable file header.
+//
+// References:
+// http://cd.textfiles.com/ataricompendium/BOOK/HTML/CHAP2.HTM#processes
+// https://mikro.naprvyraz.sk/docs/GEM/GEMDOS.TXT
+// MADMAC source from Landon Dyer (See below for URL)
+//
+// Note the above disagree on the last entry in the header layout: In practice
+// the files MADMAC produces and that ALN consumes use the header layout from
+// the Atari Compendium page.
+struct ALCHEADER
+{
+ uint16_t magic; // $601A
+ uint32_t tsize; // text segment size
+ uint32_t dsize; // data segment size
+ uint32_t bsize; // BSS segment size
+ uint32_t ssize; // symbol table size
+ uint32_t reserved0; // unused
+ uint32_t reserved1; // unused
+ uint16_t absflag; // Always '0' (relocatable) for obj files
+};
+
+// Alcyon/DRI symbol type bits - From size.c:show_dri_symbol_type() in
+// https://github.com/cubanismo/jag_utils, as well as
+// the GEMDOS Reference Manual, 4/4/86, "Executable Files" section, in the
+// table "Values For Symbol Types," available various places, e.g.,
+// https://mikro.naprvyraz.sk/docs/GEM/GEMDOS.TXT
+#define ALCSYM_DEFINED 0x8000
+#define ALCSYM_EQUATED 0x4000
+#define ALCSYM_GLOBAL 0x2000
+#define ALCSYM_EQUATED_REG 0x1000
+#define ALCSYM_EXTERN 0x0800
+#define ALCSYM_DATA 0x0400
+#define ALCSYM_TEXT 0x0200
+#define ALCSYM_BSS 0x0100
+
+// Alcyon/DRI symbol relocation flags - Derived from mark.c in the
+// original MADMAC sources released by Landon Dyer on his blog:
+//
+// https://dadhacker-125488.ingress-alpha.ewp.live/
+//
+// At this link from his September 2nd, 2008 post:
+//
+// http://www.dadhacker.com/Downloads/madmac.zip
+//
+// Downloaded from the Internet Archive Wayback Machine November 2015
+// snapshot of the above URL, here:
+//
+// https://web.archive.org/web/20151120225539/http://www.dadhacker.com/Downloads/madmac.zip
+//
+// Another valuable source of information on the Alcyon relocation data,
+// and the Alcyon/DRI C object file format in general is the Sozobon 2.0
+// source code:
+//
+// https://sourceforge.net/projects/sozobon/files/
+//
+// Sozobon is a reimplementation of the original Atari Alcyon C compiler
+// suite that can generate and link Alcyon/DRI object files compatible
+// with the original. Take a look at the jas/cpy.c file for an alternate
+// implementation of Alcyon/DRI relocation section data generation than
+// the one in MADMAC, as well as an alternate Alcyon/DRI relocation
+// data processing implementation in ld/rel.c.
+#define ALCREL_ABS 0x0000 // No relocation at this location
+#define ALCREL_DATA 0x0001 // Local address from data segment
+#define ALCREL_TEXT 0x0002 // Local address from text segment
+#define ALCREL_BSS 0x0003 // Local address from BSS segment
+#define ALCREL_EXTABS 0x0004 // External fixup: Absolute address
+#define ALCREL_LONG 0x0005 // Relocation type is in next word
+#define ALCREL_EXTPCREL 0x0006 // External fixup: PC relative address
+#define ALCREL_SYMIDX(rval) ((rval) >> 3) // 0-based index of ext fixup symbol
+
+struct ALCSYM
+{
+ uint8_t name[8]; // fixed-size, padded with zeros. NOT NUL-terminated!
+ uint16_t type; // symbol type mask, from ALCSYM_* flags above.
+ uint32_t value; // value
+};
struct OHEADER
{
uint32_t bsize;
uint32_t ssize;
union {
- struct { // For .o
+ struct { // For .o
uint32_t tsize; // Text relocation size
uint32_t dsize; // Data relocation size
uint8_t reserved[12];
} reloc;
- struct { // For .abs
- uint32_t stksize; // Unused
- uint32_t tstart; // Start of TEXT
- uint32_t rbflag; // -1 if no fixups at all
- uint32_t dstart; // Start of DATA
+ struct { // For .abs
+ uint32_t stksize; // Unused
+ uint32_t tstart; // Start of TEXT
+ uint32_t rbflag; // -1 if no fixups at all
+ uint32_t dstart; // Start of DATA
uint32_t bstart; // Start of BSS
} abs;
} absrel;
- uint8_t * ostbase; // Base of output symbol table
+ uint8_t * ostbase; // Base of output symbol table
uint32_t fsize; // Length of fixups
- uint8_t * fixups; // Start of fixups
+ uint8_t * fixups; // Start of fixups
};
#define new_oheader() (struct OHEADER *)malloc(sizeof(struct OHEADER))
+// BSD/a.out object relocation flags.
+#define BSDREL_MOVEI 0x00000001 // Word-swapped (I.e., JRISC movei) long
+#define BSDREL_WORD 0x00000002
+#define BSDREL_OP 0x00000004 // Object Processor relocation
+#define BSDREL_GLOBAL 0x00000010 // AKA external reference
+#define BSDREL_ABS 0x00000040
+#define BSDREL_PCREL 0x000000A0 // Note this implies BSDREL_GLOBAL
+#define BSDREL_SYMIDX_SHIFT 8 // Bits to shift
+#define BSDREL_SYMIDX(_rf) ((_rf) >> BSDREL_SYMIDX_SHIFT)
+#define BSDREL_SEGMASK 0xFFFFFF00
+#define BSDREL_SEG_ABS 0x00000200
+#define BSDREL_SEG_TEXT 0x00000400
+#define BSDREL_SEG_DATA 0x00000600
+#define BSDREL_SEG_BSS 0x00000800
+
struct ARHEADER
{
uint8_t a_fname[14];
uint8_t a_gid;
uint16_t a_fimode;
uint32_t a_fsize;
- uint16_t reserved; // Two bytes zeroes btwn header & file
+ uint16_t reserved; // Two bytes zeroes btwn header & file
};
#define new_arheader() (struct ARHEADER *)malloc(sizeof(struct ARHEADER))
-// Object File Structure and Related Items
+// Object file structure and related items
+
+enum { TEXT=0, DATA=1, BSS=2 };
struct OFILE
{
struct OHEADER o_header; // Header of this file
uint8_t * o_image; // Image of this file
uint8_t isArchiveFile; // Temporary extra flag
+//These are likely redundant, and can probably be removed with judicious
+//editing of where they are used (in favor of OHEADER vars)
+ uint32_t segSize[3]; // Size of TEXT, DATA & BSS (aligned)
+ uint32_t segBase[3]; // Accumulated base address of TDB
};
#define new_ofile() (struct OFILE *)malloc(sizeof(struct OFILE))
// Flags in an Object File's o_flags field
// O_USED: means this ofile is used or is on the command line or in a -x
#define O_USED 0x0001
+// N.B.: This is *never* set anywhere in the linker code...
#define O_ARCHIVE 0x0002 // This is a dummy archive entry
// Symbol Record
-// SYMREC: Used by builddir for the lists of exports and imports, and by the
-// linker for the output symbol table (that's why there are type and value
-// fields, unused in builddir)
+// SYMREC: Used by the linker for the output symbol table
-#define SYMLEN 100 // Symbol name size (incl. null)
+#define OST_SIZE_INIT 8 // Half the initial output symbol table size
struct SYMREC
{
- uint8_t s_name[SYMLEN]; // Including null terminator
- uint16_t s_type;
+ uint32_t s_idx;
+ uint32_t s_type;
uint32_t s_value;
- struct SYMREC * s_next;
};
#define new_symrec() (struct SYMREC *)malloc(sizeof(struct SYMREC))
// and Globals share a hash table, but their value fields are interpreted
// differently.
+#define SYMLEN 256 // Symbol name size (incl. null)
+
struct HREC
{
uint8_t h_sym[SYMLEN];
//#define T_COMMON (T_GLOBAL | T_EXTERN)
// Symbol Table - Type Definitions
-// N.B.: T_EXT can be ORed with any of T_ABS, T_TEXT, TDATA, or T_BSS!
-
-#define T_UNDF 0x00000000 // Undefined Symbol
-#define T_EXT 0x01000000 // External Bit, OR'ed In (Global)
-#define T_ABS 0x02000000 // Absolute Symbol (Equated)
-#define T_TEXT 0x04000000 // TEXT Segment
-#define T_DATA 0x06000000 // DATA Segment
-#define T_BSS 0x08000000 // BSS Segment
+// N.B.: T_GLBL can be ORed with any of T_ABS, T_TEXT, TDATA, or T_BSS!
+// Also, these are really a mashup of a struct, consisting of the
+// following items: type (1 byte), other (1 byte), & descr. (2 bytes).
+// Also, the type is not enough to distinguish between external &
+// common symbols; for this, you need to go to the value field to see
+// what's there (0=external, !0=common).
+
+#define T_UNDF 0x00000000 // Undefined symbol
+#define T_GLBL 0x01000000 // Scoping bit, OR'ed in (global)
+#define T_ABS 0x02000000 // Absolute symbol (equated)
+#define T_TEXT 0x04000000 // TEXT segment
+#define T_DATA 0x06000000 // DATA segment
+#define T_BSS 0x08000000 // BSS segment
#define T_SEG (T_DATA | T_TEXT | T_BSS) // segment bits
// These macros are used with the TYPE field of a SYMBOL.
+// They are also mostly WRONG
/*
Absolutes (equates) can't be externals (line 434)
-- they are non-relocatable
*/
-#define iscommon(type) (((type) & T_EXT) == 0)
-#define islocal(type) (((type) & T_EXT) == 0)
-#define isglobal(type) ((type) & T_EXT)
-#define isextern(type) ((type) & T_EXT)
+#define iscommon(type) (((type) & T_GLBL) == 0)
+#define islocal(type) (((type) & T_GLBL) == 0)
+#define isglobal(type) ((type) & T_GLBL)
+#define isextern(type) ((type) & T_GLBL)
/*
Shamus:
projects / rln / blobdiff