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Diffstat (limited to 'include/coff/ti.h')
| -rw-r--r-- | include/coff/ti.h | 437 |
1 files changed, 437 insertions, 0 deletions
diff --git a/include/coff/ti.h b/include/coff/ti.h new file mode 100644 index 000000000..6a9378136 --- /dev/null +++ b/include/coff/ti.h @@ -0,0 +1,437 @@ +/* COFF information for TI COFF support. Definitions in this file should be + customized in a target-specific file, and then this file included (see + tic54x.h for an example). */ +#ifndef COFF_TI_H +#define COFF_TI_H + +/********************** 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 + */ +/* 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. + TI COFF puts the section alignment power of two in the section flags + e.g. 2**N is alignment, flags |= (N & 0xF) << 8 +*/ +#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 + These flags are used by GDB to identify the destination page for + addresses. +*/ + +#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 */ + +#endif /* COFF_TI_H */ |