BFD and include/coff support for tic54x target.

4 files changed, 450 insertions, 2 deletions

diff --git a/include/coff/ChangeLog b/include/coff/ChangeLog
index 9630f40..6da6a6f 100644
--- a/include/coff/ChangeLog
+++ b/include/coff/ChangeLog
@@ -1,3 +1,9 @@
+2000-04-07  Timothy Wall  <twall@cygnus.com>
+
+	* internal.h: Fix some comments related to TI COFF (instead of tic80).
+	* ti.h: New.
+	* tic54x.h: New.
+	
 Wed Apr  5 22:08:41 2000  J"orn Rennecke <amylaar@cygnus.co.uk>
 
 	* sh.h (R_SH_LOOP_START, R_SH_LOOP_END): Define.
diff --git a/include/coff/internal.h b/include/coff/internal.h
index e89b528..4fbea7a 100644
--- a/include/coff/internal.h
+++ b/include/coff/internal.h
@@ -53,7 +53,7 @@ struct internal_filehdr
   long f_nsyms;			/* number of symtab entries	*/
   unsigned short f_opthdr;	/* sizeof(optional hdr)		*/
   unsigned short f_flags;	/* flags			*/
-  unsigned short f_target_id;	/* (TIc80 specific)		*/
+  unsigned short f_target_id;	/* (TI COFF specific)		*/
 };
 
 
@@ -222,7 +222,7 @@ struct internal_aouthdr
 
 #define C_WEAKEXT	127	/* weak symbol -- GNU extension */
 
-/* New storage classes for TIc80 */
+/* New storage classes for TI COFF */
 #define C_UEXT		19	/* Tentative external definition */
 #define C_STATLAB	20	/* Static load time label */
 #define C_EXTLAB	21	/* External load time label */
diff --git a/include/coff/ti.h b/include/coff/ti.h
new file mode 100644
index 0000000..06a315b
--- /dev/null
+++ b/include/coff/ti.h
@@ -0,0 +1,431 @@
+/*** COFF information for generic Texas Instruments COFF flavour */
+
+/********************** FILE HEADER **********************/
+
+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			*/
+        char f_target_id[2];    /* magic no. (TI COFF-specific) */
+};
+
+/* COFF0 has magic number in f_magic, and omits f_target_id from the file
+   header; for later versions, f_magic is 0xC1 for COFF1 and 0xC2 for COFF2
+   and the target-specific magic number is found in f_target_id */ 
+
+#define TICOFF0MAGIC    TI_TARGET_ID
+#define TICOFF1MAGIC    0x00C1
+#define TICOFF2MAGIC    0x00C2
+#define TICOFF_AOUT_MAGIC    0x0108 /* magic number in optional header */
+#define TICOFF          1 /* customize coffcode.h */
+
+/* The target_id field changes depending on the particular CPU target */
+/* for COFF0, the target id appeared in f_magic, where COFFX magic is now */
+#ifndef TI_TARGET_ID
+#error "TI_TARGET_ID needs to be defined for your CPU"
+#endif
+
+/* Which bfd_arch to use... */
+#ifndef TICOFF_TARGET_ARCH
+#error "TICOFF_TARGET_ARCH needs to be defined for your CPU"
+#endif
+
+/* Default to COFF2 for file output */
+#ifndef TICOFF_DEFAULT_MAGIC
+#define TICOFF_DEFAULT_MAGIC TICOFF2MAGIC
+#endif
+
+/* This value is made available in the rare case where a bfd is unavailable */
+#ifndef OCTETS_PER_BYTE_POWER
+#warn OCTETS_PER_BYTE_POWER not defined for this CPU, it will default to 0
+#else
+#define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
+#endif
+
+/* default alignment is on a byte (not octet!) boundary */
+#ifndef COFF_DEFAULT_SECTION_ALIGNMENT_POWER
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
+#endif
+
+/* TI COFF encodes the section alignment in the section header flags */
+#define COFF_ALIGN_IN_SECTION_HEADER 1
+#define COFF_ALIGN_IN_S_FLAGS 1
+/* requires a power-of-two argument */
+#define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X)&0xF)<<8))
+/* result is a power of two */
+#define COFF_DECODE_ALIGNMENT(X) (((X)>>8)&0xF)
+
+#define COFF0_P(ABFD) (bfd_coff_filhsz(ABFD) == FILHSZ_V0)
+#define COFF2_P(ABFD) (bfd_coff_scnhsz(ABFD) != SCNHSZ_V01)
+
+#define COFF0_BADMAG(x) ((x).f_magic != TICOFF0MAGIC)
+#define COFF1_BADMAG(x) ((x).f_magic != TICOFF1MAGIC || (x).f_target_id != TI_TARGET_ID)
+#define COFF2_BADMAG(x) ((x).f_magic != TICOFF2MAGIC || (x).f_target_id != TI_TARGET_ID)
+
+/* we need to read/write an extra field in the coff file header */
+#ifndef COFF_ADJUST_FILEHDR_IN_POST
+#define COFF_ADJUST_FILEHDR_IN_POST(abfd,src,dst) \
+do { ((struct internal_filehdr *)(dst))->f_target_id = \
+bfd_h_get_16(abfd, (bfd_byte *)(((FILHDR *)(src))->f_target_id)); \
+((struct internal_filehdr *)(dst))->f_flags |= F_LDPAGE; \
+} while(0)
+#endif
+
+#ifndef COFF_ADJUST_FILEHDR_OUT_POST
+#define COFF_ADJUST_FILEHDR_OUT_POST(abfd,src,dst) \
+do { bfd_h_put_16(abfd, ((struct internal_filehdr *)(src))->f_target_id, \
+             (bfd_byte *)(((FILHDR *)(dst))->f_target_id)); \
+} while(0)
+#endif
+
+#define	FILHDR	struct external_filehdr
+#define	FILHSZ	22
+#define FILHSZ_V0 20                /* COFF0 omits target_id field */
+
+/* File header flags */
+#define	F_RELFLG	(0x0001)
+#define	F_EXEC		(0x0002)
+#define	F_LNNO		(0x0004)
+/* F_LSYMS needs to be redefined in your source file */
+#define	F_LSYMS_TICOFF	(0x0010) /* normal COFF is 0x8 */
+
+#define F_10            0x00    /* file built for TMS320C1x devices */
+#define F_20            0x10    /* file built for TMS320C2x devices */
+#define F_25            0x20    /* file built for TMS320C2x/C5x devices */
+#define F_LENDIAN       0x0100  /* 16 bits/word, LSB first */
+#define F_SYMMERGE      0x1000  /* duplicate symbols were removed */
+
+/********************** OPTIONAL HEADER **********************/
+
+
+typedef struct 
+{
+  char 	magic[2];		/* type of file (0x108) 		*/
+  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 AOUTHDRSZ 28
+#define AOUTSZ 28
+
+
+/********************** SECTION HEADER **********************/
+/* COFF0, COFF1 */
+struct external_scnhdr_v01 {
+	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 (in WORDS)      */
+	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[2];	/* flags			*/
+        char            s_reserved[1];  /* reserved                     */ 
+        char            s_page[1];      /* section page number (LOAD)   */
+};
+
+/* COFF2 */
+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 (in WORDS)      */
+	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[4];	/* number of relocation entries	*/
+	char		s_nlnno[4];	/* number of line number entries*/
+	char		s_flags[4];	/* flags			*/
+        char            s_reserved[2];  /* reserved                     */ 
+        char            s_page[2];      /* section page number (LOAD)   */
+};
+
+/*
+ * Special section flags
+ * TI COFF puts the section alignment power of two in the section flags
+ * e.g. 2**N is alignment, flags |= (N & 0xF) << 8
+ */
+/* recognized load pages */
+#define PG_PROG         0x0         /* PROG page */
+#define PG_DATA         0x1         /* DATA page */
+
+/* TI COFF defines these flags; 
+   STYP_CLINK: the section should be excluded from the final
+   linker output if there are no references found to any symbol in the section
+   STYP_BLOCK: the section should be blocked, i.e. if the section would cross
+   a page boundary, it is started at a page boundary instead.
+*/ 
+#define STYP_CLINK      (0x4000)
+#define STYP_BLOCK      (0x1000)
+#define STYP_ALIGN      (0x0F00) /* TI COFF stores section alignment here */
+
+#define	SCNHDR_V01 struct external_scnhdr_v01
+#define SCNHDR struct external_scnhdr
+#define	SCNHSZ_V01 40                  /* for v0 and v1 */
+#define SCNHSZ 48
+
+/* COFF2 changes the offsets and sizes of these fields 
+   Assume we're dealing with the COFF2 scnhdr structure, and adjust
+   accordingly 
+ */
+#define GET_SCNHDR_NRELOC(ABFD,PTR) \
+(COFF2_P(ABFD) ? bfd_h_get_32 (ABFD,PTR) : bfd_h_get_16 (ABFD, PTR))
+#define PUT_SCNHDR_NRELOC(ABFD,VAL,PTR) \
+(COFF2_P(ABFD) ? bfd_h_put_32 (ABFD,VAL,PTR) : bfd_h_put_16 (ABFD,VAL,PTR))
+#define GET_SCNHDR_NLNNO(ABFD,PTR) \
+(COFF2_P(ABFD) ? bfd_h_get_32 (ABFD,PTR) : bfd_h_get_16 (ABFD, (PTR)-2))
+#define PUT_SCNHDR_NLNNO(ABFD,VAL,PTR) \
+(COFF2_P(ABFD) ? bfd_h_put_32 (ABFD,VAL,PTR) : bfd_h_put_16 (ABFD,VAL,(PTR)-2))
+#define GET_SCNHDR_FLAGS(ABFD,PTR) \
+(COFF2_P(ABFD) ? bfd_h_get_32 (ABFD,PTR) : bfd_h_get_16 (ABFD, (PTR)-4))
+#define PUT_SCNHDR_FLAGS(ABFD,VAL,PTR) \
+(COFF2_P(ABFD) ? bfd_h_put_32 (ABFD,VAL,PTR) : bfd_h_put_16 (ABFD,VAL,(PTR)-4))
+#define GET_SCNHDR_PAGE(ABFD,PTR) \
+(COFF2_P(ABFD) ? bfd_h_get_16 (ABFD,PTR) : bfd_h_get_8 (ABFD, (PTR)-7))
+/* on output, make sure that the "reserved" field is zero */
+#define PUT_SCNHDR_PAGE(ABFD,VAL,PTR) \
+(COFF2_P(ABFD) ? bfd_h_put_16 (ABFD,VAL,PTR) : \
+bfd_h_put_8 (ABFD,VAL,(PTR)-7), bfd_h_put_8 (ABFD, 0, (PTR)-8))
+
+/* TI COFF stores section size as number of bytes (address units, not octets),
+   so adjust to be number of octets, which is what BFD expects */ 
+#define GET_SCNHDR_SIZE(ABFD,SZP) \
+(bfd_h_get_32(ABFD,SZP)*bfd_octets_per_byte(ABFD))
+#define PUT_SCNHDR_SIZE(ABFD,SZ,SZP) \
+bfd_h_put_32(ABFD,(SZ)/bfd_octets_per_byte(ABFD),SZP)
+
+#define COFF_ADJUST_SCNHDR_IN_POST(ABFD,EXT,INT) \
+do { ((struct internal_scnhdr *)(INT))->s_page = \
+GET_SCNHDR_PAGE(ABFD,(bfd_byte *)((SCNHDR *)(EXT))->s_page); \
+} while(0)
+
+/* The line number and reloc overflow checking in coff_swap_scnhdr_out in
+   coffswap.h doesn't use PUT_X for s_nlnno and s_nreloc.
+   Due to different sized v0/v1/v2 section headers, we have to re-write these
+   fields.
+ */
+#define COFF_ADJUST_SCNHDR_OUT_POST(ABFD,INT,EXT) \
+do { \
+PUT_SCNHDR_NLNNO(ABFD,((struct internal_scnhdr *)(INT))->s_nlnno,\
+                (bfd_byte *)((SCNHDR *)(EXT))->s_nlnno); \
+PUT_SCNHDR_NRELOC(ABFD,((struct internal_scnhdr *)(INT))->s_nreloc,\
+                (bfd_byte *)((SCNHDR *)(EXT))->s_nreloc); \
+PUT_SCNHDR_FLAGS(ABFD,((struct internal_scnhdr *)(INT))->s_flags, \
+                (bfd_byte *)((SCNHDR *)(EXT))->s_flags); \
+PUT_SCNHDR_PAGE(ABFD,((struct internal_scnhdr *)(INT))->s_page, \
+                (bfd_byte *)((SCNHDR *)(EXT))->s_page); \
+} while(0)
+
+/* page macros
+
+   the first GDB port requires flags in its remote memory access commands to
+   distinguish between data/prog space.  hopefully we can make this go away
+   eventually.  stuff the page in the upper bits of a 32-bit address, since
+   the c5x family only uses 16 or 23 bits.
+
+   c2x, c5x and most c54x devices have 16-bit addresses, but the c548 has
+   23-bit program addresses.  make sure the page flags don't interfere 
+
+*/
+
+#define LONG_ADDRESSES  1
+#define PG_SHIFT        (LONG_ADDRESSES ? 30 : 16)
+#define ADDR_MASK       ((1ul<<PG_SHIFT)-1)/* 16 or 24-bit addresses */
+#define PG_MASK         (3ul<<PG_SHIFT)
+#define PG_TO_FLAG(p)   ((p)<<PG_SHIFT)
+#define FLAG_TO_PG(f)   (((f)&PG_MASK)>>PG_SHIFT)
+
+/*
+ * names of "special" sections
+ */
+#define _TEXT	".text"
+#define _DATA	".data"
+#define _BSS	".bss"
+#define _CINIT  ".cinit"            /* initialized C data */
+#define _SCONST  ".const"           /* constants */
+#define _SWITCH ".switch"           /* switch tables */
+#define _STACK  ".stack"            /* C stack */
+#define _SYSMEM ".sysmem"           /* used for malloc et al. syscalls */
+
+/********************** LINE NUMBERS **********************/
+
+/* 1 line number entry for every "breakpointable" source line in a section.
+ * Line numbers are grouped on a per function basis; first entry in a function
+ * grouping will have l_lnno = 0 and in place of physical address will be the
+ * symbol table index of the function name.
+ */
+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
+
+
+/********************** SYMBOLS **********************/
+
+/* NOTE: this is what a local label looks like in assembly source; what it
+   looks like in COFF output is undefined */
+#define TICOFF_LOCAL_LABEL_P(NAME) \
+((NAME[0] == '$' && NAME[1] >= '0' && NAME[1] <= '9' && NAME[2] == '\0') \
+ || NAME[strlen(NAME)-1] == '?')
+
+#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
+#define E_FILNMLEN	14	/* # characters in a file name		*/
+#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
+
+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 N_BTMASK	(017)
+#define N_TMASK		(060)
+#define N_BTSHFT	(4)
+#define N_TSHIFT	(2)
+  
+
+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	SYMENT	struct external_syment
+#define	SYMESZ	18	
+#define	AUXENT	union external_auxent
+#define	AUXESZ	18
+
+/* section lengths are in target bytes (not host bytes) */
+#define GET_SCN_SCNLEN(ABFD,EXT) \
+(bfd_h_get_32(ABFD,(bfd_byte *)(EXT)->x_scn.x_scnlen)*bfd_octets_per_byte(ABFD))
+#define PUT_SCN_SCNLEN(ABFD,INT,EXT) \
+bfd_h_put_32(ABFD,(INT)/bfd_octets_per_byte(ABFD),\
+             (bfd_byte *)(EXT)->x_scn.x_scnlen)
+
+/* lnsz size is in bits in COFF file, in bytes in BFD */
+#define GET_LNSZ_SIZE(abfd, ext) \
+(bfd_h_get_16(abfd, (bfd_byte *)ext->x_sym.x_misc.x_lnsz.x_size) / \
+ (class != C_FIELD ? 8 : 1))
+
+#define PUT_LNSZ_SIZE(abfd, in, ext) \
+ bfd_h_put_16(abfd, ((class != C_FIELD) ? (in)*8 : (in)), \
+              (bfd_byte*) ext->x_sym.x_misc.x_lnsz.x_size)
+ 
+/* TI COFF stores offsets for MOS and MOU in bits; BFD expects bytes */
+#define COFF_ADJUST_SYM_IN_POST(ABFD,EXT,INT) \
+do { struct internal_syment *dst = (struct internal_syment *)(INT); \
+if (dst->n_sclass == C_MOS || dst->n_sclass == C_MOU) dst->n_value /= 8; \
+} while (0)
+
+#define COFF_ADJUST_SYM_OUT_POST(ABFD,INT,EXT) \
+do { struct internal_syment *src = (struct internal_syment *)(INT); \
+SYMENT *dst = (SYMENT *)(EXT); \
+if(src->n_sclass == C_MOU || src->n_sclass == C_MOS) \
+bfd_h_put_32(abfd,src->n_value * 8,(bfd_byte *)dst->e_value); \
+} while (0)
+
+/* detect section-relative absolute symbols so they get flagged with a sym
+   index of -1 
+*/
+#define SECTION_RELATIVE_ABSOLUTE_SYMBOL_P(RELOC,SECT) \
+((*(RELOC)->sym_ptr_ptr)->section->output_section == (SECT) \
+ && (RELOC)->howto->name[0] == 'A')
+
+/********************** RELOCATION DIRECTIVES **********************/
+
+struct external_reloc_v0 {
+  char r_vaddr[4];
+  char r_symndx[2];
+  char r_reserved[2];
+  char r_type[2];
+};
+
+struct external_reloc {
+  char r_vaddr[4];
+  char r_symndx[4];
+  char r_reserved[2]; /* extended pmad byte for COFF2 */
+  char r_type[2];
+};
+
+#define RELOC struct external_reloc
+#define RELSZ_V0 10                 /* FIXME -- coffcode.h needs fixing */
+#define RELSZ 12                    /* for COFF1/2 */
+
+/* various relocation types.  */
+#define R_ABS     0x0000            /* no relocation */
+#define R_REL13   0x002A            /* 13-bit direct reference (???) */
+#define R_PARTLS7 0x0028            /* 7 LSBs of an address */
+#define R_PARTMS9 0x0029            /* 9MSBs of an address */
+#define R_EXTWORD 0x002B            /* 23-bit direct reference */
+#define R_EXTWORD16 0x002C          /* 16-bit direct reference to 23-bit addr*/
+#define R_EXTWORDMS7 0x002D         /* upper 7 bits of 23-bit address */
+/*EOF*/
diff --git a/include/coff/tic54x.h b/include/coff/tic54x.h
new file mode 100644
index 0000000..a2e45f2
--- /dev/null
+++ b/include/coff/tic54x.h
@@ -0,0 +1,11 @@
+/*** COFF information for Texas Instruments TMS320C54X */
+#define TIC54X_TARGET_ID 0x98
+#define TIC54XALGMAGIC  0x009B  /* c54x algebraic assembler output */
+#define TIC5X_TARGET_ID  0x92
+#define TI_TARGET_ID TIC54X_TARGET_ID
+#define OCTETS_PER_BYTE_POWER 1 /* octets per byte, as a power of two */
+#define HOWTO_BANK 6 /* add to howto to get absolute/sect-relative version */
+#define TICOFF_TARGET_ARCH bfd_arch_tic54x
+#define TICOFF_DEFAULT_MAGIC TICOFF1MAGIC /* we use COFF1 for compatibility */
+#include "coff/ti.h"
+/*EOF*/