Add support for OpenRISC 32-bit embedded processor

1 files changed, 287 insertions, 0 deletions

diff --git a/include/coff/or32.h b/include/coff/or32.h
new file mode 100644
index 0000000..c2797aa
--- /dev/null
+++ b/include/coff/or32.h
@@ -0,0 +1,287 @@
+/* COFF specification for OpenRISC 1000.
+   Copyright (C) 1993-2000, 2002 Free Software Foundation, Inc.
+   Contributed by David Wood @ New York University.
+   Modified by Johan Rydberg, <johan.rydberg@netinsight.se>
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef OR32
+# define OR32
+#endif
+
+/* File Header and related definitions.  */
+struct external_filehdr
+{
+  char f_magic[2];	/* magic number		    */
+  char f_nscns[2];	/* number of sections	    */
+  char f_timdat[4];     /* time & date stamp	    */
+  char f_symptr[4];     /* file pointer to symtab   */
+  char f_nsyms[4];	/* number of symtab entries */
+  char f_opthdr[2];     /* sizeof(optional hdr)	    */
+  char f_flags[2];	/* flags		    */
+};
+
+#define FILHDR  struct external_filehdr
+#define FILHSZ	20
+
+/* Magic numbers for OpenRISC 1000. As it is know we use the
+   numbers for Am29000.
+
+   (AT&T will assign the "real" magic number).  */
+#define SIPFBOMAGIC     0572    /* Am29000 (Byte 0 is MSB).  */
+#define SIPRBOMAGIC     0573    /* Am29000 (Byte 0 is LSB).  */
+
+#define OR32_MAGIC_BIG 		SIPFBOMAGIC	
+#define OR32_MAGIC_LITTLE	SIPRBOMAGIC	
+#define OR32BADMAG(x)     (((x).f_magic!=OR32_MAGIC_BIG) && \
+			                      ((x).f_magic!=OR32_MAGIC_LITTLE))
+
+#define OMAGIC OR32_MAGIC_BIG
+
+/* Optional (a.out) header.  */
+typedef	struct external_aouthdr 
+{
+  char  magic[2];         /* type of file                     */
+  char  vstamp[2];	  /* version stamp                    */
+  char  tsize[4];	  /* text size in bytes, padded to FW bdry */
+  char  dsize[4];	  /* initialized data "  "            */
+  char  bsize[4];	  /* uninitialized data "   "         */
+  char  entry[4];	  /* entry pt.                        */
+  char  text_start[4];	  /* base of text used for this file  */
+  char  data_start[4];	  /* base of data used for this file  */
+} AOUTHDR;
+
+#define AOUTSZ      28
+#define AOUTHDRSZ   28
+
+/* aouthdr magic numbers.  */
+#define NMAGIC    0410	  /* separate i/d executable.  */
+#define SHMAGIC   0406	  /* NYU/Ultra3 shared data executable 
+                             (writable text).  */
+
+#define _ETEXT   	"_etext"
+
+/* Section header and related definitions.  */
+struct external_scnhdr 
+{
+  char	    s_name[8];      /* section name                   */
+  char	    s_paddr[4];     /* physical address, aliased s_nlib */
+  char	    s_vaddr[4];     /* virtual address                */
+  char	    s_size[4];      /* section size                   */
+  char	    s_scnptr[4];    /* file ptr to raw data for section */
+  char	    s_relptr[4];    /* file ptr to relocation         */
+  char	    s_lnnoptr[4];   /* file ptr to line numbers       */
+  char	    s_nreloc[2];    /* number of relocation entries   */
+  char	    s_nlnno[2];     /* number of line number entries  */
+  char	    s_flags[4];     /* flags                          */
+};
+
+#define	SCNHDR	struct external_scnhdr
+#define	SCNHSZ	40
+
+/* Names of "special" sections:  */
+#define _TEXT   ".text"
+#define _DATA   ".data"
+#define _BSS    ".bss"
+#define _LIT    ".lit"
+
+/* Section types - with additional section type for global 
+   registers which will be relocatable for the OpenRISC 1000.
+
+   In instances where it is necessary for a linker to produce an
+   output file which contains text or data not based at virtual
+   address 0, e.g. for a ROM, then the linker should accept
+   address base information as command input and use PAD sections
+   to skip over unused addresses.  */
+#define	STYP_BSSREG 0x1200	/* Global register area (like STYP_INFO) */
+#define STYP_ENVIR  0x2200	/* Environment (like STYP_INFO) */
+#define STYP_ABS    0x4000	/* Absolute (allocated, not reloc, loaded) */
+
+/* Relocation information declaration and related definitions:  */
+struct external_reloc
+{
+  char r_vaddr[4];    /* (virtual) address of reference */
+  char r_symndx[4];   /* index into symbol table */
+  char r_type[2];     /* relocation type */
+};
+
+#define	RELOC		struct external_reloc
+#define	RELSZ		10		/* sizeof (RELOC) */ 
+
+/* Relocation types for the OpenRISC 1000: */
+
+#define	R_ABS     0     /* reference is absolute */
+#define	R_IREL    030	/* instruction relative (jmp/call) */
+#define	R_IABS    031	/* instruction absolute (jmp/call) */
+#define	R_ILOHALF 032	/* instruction low half  (const)  */
+#define	R_IHIHALF 033	/* instruction high half (consth) part 1 */
+#define	R_IHCONST 034	/* instruction high half (consth) part 2 */
+                        /* constant offset of R_IHIHALF relocation */
+#define	R_BYTE    035	/* relocatable byte value */
+#define R_HWORD   036	/* relocatable halfword value */
+#define R_WORD    037	/* relocatable word value */
+
+#define	R_IGLBLRC 040	/* instruction global register RC */
+#define	R_IGLBLRA 041	/* instruction global register RA */
+#define	R_IGLBLRB 042	/* instruction global register RB */
+ 
+/*
+  NOTE:
+  All the "I" forms refer to 29000 instruction formats.  The linker is 
+  expected to know how the numeric information is split and/or aligned
+  within the instruction word(s).  R_BYTE works for instructions, too.
+
+  If the parameter to a CONSTH instruction is a relocatable type, two 
+  relocation records are written.  The first has an r_type of R_IHIHALF 
+  (33 octal) and a normal r_vaddr and r_symndx.  The second relocation 
+  record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which 
+  is redundant), and an r_symndx containing the 32-bit constant offset 
+  to the relocation instead of the actual symbol table index.  This 
+  second record is always written, even if the constant offset is zero.
+  The constant fields of the instruction are set to zero.  */
+
+/* Line number entry declaration and related definitions:  */
+struct external_lineno 
+{
+  union
+  {
+    char l_symndx[4];  /* function name symbol index, iff l_lnno == 0*/
+    char l_paddr[4];   /* (physical) address of line number    */
+  }
+  l_addr;
+
+  char l_lnno[2];      /* line number	  */
+};
+
+#define	LINENO		struct external_lineno
+#define	LINESZ		6		  /* sizeof (LINENO) */
+
+/* Symbol entry declaration and related definitions:  */
+#define	E_SYMNMLEN	8	  /* Number of characters in a symbol name */
+
+struct external_syment
+{
+  union
+  {
+    char e_name[E_SYMNMLEN];
+    struct
+    {
+      char e_zeroes[4];
+      char e_offset[4];
+    }
+    e;
+  }
+  e;
+
+  char e_value[4];
+  char e_scnum[2];
+  char e_type[2];
+  char e_sclass[1];
+  char e_numaux[1];
+};
+
+#define	SYMENT	struct external_syment
+#define	SYMESZ 	18
+
+/* Storage class definitions - new classes for global registers:  */
+#define C_GLBLREG	19		/* global register */
+#define C_EXTREG	20		/* external global register */
+#define	C_DEFREG	21		/* ext. def. of global register */
+
+/* Derived symbol mask/shifts:  */
+#define N_BTMASK	(0xf)
+#define N_BTSHFT	(4)
+#define N_TMASK		(0x30)
+#define N_TSHIFT	(2)
+
+/* Auxiliary symbol table entry declaration and related 
+   definitions.  */
+#define E_FILNMLEN  14  /* # characters in a file name	  */
+#define E_DIMNUM    4   /* # array dimensions in auxiliary entry */
+
+union external_auxent
+{
+  struct
+  {
+    char x_tagndx[4];       /* str, un, or enum tag indx */
+    union
+    {
+      struct
+      {
+	char  x_lnno[2];    /* declaration line number */
+        char  x_size[2];    /* str/union/array size */
+      }
+      x_lnsz;
+
+      char x_fsize[4];      /* size of function */
+    }
+    x_misc;
+
+    union
+    {
+      struct 		          /* if ISFCN, tag, or .bb */
+      {
+	char x_lnnoptr[4];  /* ptr to fcn line # */
+        char x_endndx[4];   /* entry ndx past block end */
+      }
+      x_fcn;
+
+      struct   	          /* if ISARY, up to 4 dimen. */
+      {
+	char x_dimen[E_DIMNUM][2];
+      }
+      x_ary;
+    }
+    x_fcnary;
+
+    char x_tvndx[2];        /* tv index */
+  }
+  x_sym;
+
+  union
+  {
+    char x_fname[E_FILNMLEN];
+
+    struct
+    {
+      char x_zeroes[4];
+      char x_offset[4];
+    }
+    x_n;
+  }
+  x_file;
+
+  struct
+  {
+    char x_scnlen[4];       /* section length */
+    char x_nreloc[2];       /* # relocation entries */
+    char x_nlinno[2];       /* # line numbers */
+  }
+  x_scn;
+
+  struct
+  {
+    char x_tvfill[4];       /* tv fill value */
+    char x_tvlen[2];        /* length of .tv */
+    char x_tvran[2][2];     /* tv range */
+  }
+  x_tv;                   /* info about .tv section 
+			     (in auxent of symbol .tv)) */
+};
+
+#define	AUXENT		union external_auxent
+#define	AUXESZ		18