/*** 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<>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) /* * 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*/