Fri Jan 8 16:19:26 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com)

* ecoff-ext.h: Added prototypes for ECOFF swapping functions.
	* internal.h (internal_scnhdr): Always provide s_align field, not
	just on i960.
	(internal_reloc): Always provide r_size field, not just on
	RS/6000.
	* mips.h (_RDATA, _SDATA, _SBSS, _LIT4, _LIT8, STYP_RDATA,
	STYP_SDATA, STYP_SBSS, STYP_LIT4, STYP_LIT8): Defined.
	(CODE_MASK, MIPS_IS_STAB, MIPS_MARK_STAB, MIPS_UNMARK_STAB,
	STABS_SYMBOL): Moved in from gdb/mipsread.c.

include/coff/mips.h

@@ -0,0 +1,121 @@
+/* Rudimentary ECOFF support on MIPS machines. 
+   This lacks symbol information, normally provided on MIPS Unix systems
+   in the files <sym.h> and <symconst.h>.  */
+
+/********************** FILE HEADER **********************/
+
+struct external_filehdr {
+  unsigned char f_magic[2];	/* magic number			*/
+  unsigned char f_nscns[2];	/* number of sections		*/
+  unsigned char f_timdat[4];	/* time & date stamp		*/
+  unsigned char f_symptr[4];	/* file pointer to symtab	*/
+  unsigned char f_nsyms[4];	/* number of symtab entries	*/
+  unsigned char f_opthdr[2];	/* sizeof(optional hdr)		*/
+  unsigned char f_flags[2];	/* flags			*/
+};
+
+
+/* Mips magics */
+#define MIPS_MAGIC_1 0x0180
+#define MIPS_MAGIC_2 0x0162
+#define MIPS_MAGIC_3 0x0160
+
+#define ECOFFBADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
+			((x).f_magic!=MIPS_MAGIC_2) &&\
+			((x).f_magic!=MIPS_MAGIC_3))
+
+
+#define	FILHDR	struct external_filehdr
+#define	FILHSZ	20
+
+/********************** AOUT "OPTIONAL HEADER" **********************/
+
+
+typedef struct external_aouthdr
+{
+  unsigned char magic[2];	/* type of file				*/
+  unsigned char	vstamp[2];	/* version stamp			*/
+  unsigned char	tsize[4];	/* text size in bytes, padded to FW bdry*/
+  unsigned char	dsize[4];	/* initialized data "  "		*/
+  unsigned char	bsize[4];	/* uninitialized data "   "		*/
+  unsigned char	entry[4];	/* entry pt.				*/
+  unsigned char text_start[4];	/* base of text used for this file */
+  unsigned char data_start[4];	/* base of data used for this file */
+} AOUTHDR;
+
+/* compute size of a header */
+
+#define AOUTSZ (sizeof(AOUTHDR))
+
+
+/********************** SECTION HEADER **********************/
+
+struct external_scnhdr {
+  unsigned char	s_name[8];	/* section name			*/
+  unsigned char	s_paddr[4];	/* physical address, aliased s_nlib */
+  unsigned char	s_vaddr[4];	/* virtual address		*/
+  unsigned char	s_size[4];	/* section size			*/
+  unsigned char	s_scnptr[4];	/* file ptr to raw data for section */
+  unsigned char	s_relptr[4];	/* file ptr to relocation	*/
+  unsigned char	s_lnnoptr[4];	/* file ptr to line numbers	*/
+  unsigned char	s_nreloc[2];	/* number of relocation entries	*/
+  unsigned char	s_nlnno[2];	/* number of line number entries*/
+  unsigned char	s_flags[4];	/* flags			*/
+};
+
+#define	SCNHDR	struct external_scnhdr
+#define	SCNHSZ	sizeof(SCNHDR)
+
+/*
+ * names of "special" sections
+ */
+#define _TEXT   ".text"
+#define _DATA   ".data"
+#define _BSS    ".bss"
+#define _RDATA	".rdata"
+#define _SDATA	".sdata"
+#define _SBSS	".sbss"
+#define _LIT4	".lit4"
+#define _LIT8	".lit8"
+
+#define DEFAULT_DATA_SECTION_ALIGNMENT 4
+#define DEFAULT_BSS_SECTION_ALIGNMENT 4
+#define DEFAULT_TEXT_SECTION_ALIGNMENT 16
+/* For new sections we havn't heard of before */
+#define DEFAULT_SECTION_ALIGNMENT 4
+
+/* MIPS ECOFF uses some additional section types.  */
+#define STYP_RDATA 0x100
+#define STYP_SDATA 0x200
+#define STYP_SBSS 0x400
+#define STYP_LIT8 0x8000000
+#define STYP_LIT4 0x10000000
+
+/* I don't know when this is used.  */
+#define STYP_OTHER_LOAD 0x80000000
+
+/********************** RELOCATION DIRECTIVES **********************/
+
+struct external_reloc {
+  unsigned char r_vaddr[4];
+  unsigned char r_symndx[4];
+  unsigned char r_type[2];
+  unsigned char pad[2];
+};
+
+
+/* Relevent values for r_type and ecoff.  Would someone please document them */
+
+#define RELOC struct external_reloc
+#define RELSZ 12
+
+/* gcc uses mips-tfile to output type information in special stabs
+   entries.  These must match the corresponding definition in
+   gcc/config/mips.h.  At some point, these should probably go into a
+   shared include file, but currently gcc and gdb do not share any
+   directories. */
+#define CODE_MASK 0x8F300
+#define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK)
+#define MIPS_MARK_STAB(code) ((code)+CODE_MASK)
+#define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK)
+#define STABS_SYMBOL "@stabs"