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https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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270 lines
8.1 KiB
C
270 lines
8.1 KiB
C
/*** coff information for Hitachi SH */
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/********************** FILE HEADER **********************/
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struct external_filehdr {
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char f_magic[2]; /* magic number */
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char f_nscns[2]; /* number of sections */
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char f_timdat[4]; /* time & date stamp */
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char f_symptr[4]; /* file pointer to symtab */
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char f_nsyms[4]; /* number of symtab entries */
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char f_opthdr[2]; /* sizeof(optional hdr) */
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char f_flags[2]; /* flags */
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};
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#define SH_ARCH_MAGIC_BIG 0x0500
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#define SH_ARCH_MAGIC_LITTLE 0x0550 /* Little endian SH */
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#define SHBADMAG(x) \
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(((x).f_magic!=SH_ARCH_MAGIC_BIG) && \
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((x).f_magic!=SH_ARCH_MAGIC_LITTLE))
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#define FILHDR struct external_filehdr
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#define FILHSZ 20
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/********************** AOUT "OPTIONAL HEADER" **********************/
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typedef struct
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{
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char magic[2]; /* type of file */
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char vstamp[2]; /* version stamp */
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char tsize[4]; /* text size in bytes, padded to FW bdry*/
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char dsize[4]; /* initialized data " " */
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char bsize[4]; /* uninitialized data " " */
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char entry[4]; /* entry pt. */
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char text_start[4]; /* base of text used for this file */
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char data_start[4]; /* base of data used for this file */
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}
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AOUTHDR;
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#define AOUTHDRSZ 28
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#define AOUTSZ 28
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/********************** SECTION HEADER **********************/
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struct external_scnhdr {
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char s_name[8]; /* section name */
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char s_paddr[4]; /* physical address, aliased s_nlib */
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char s_vaddr[4]; /* virtual address */
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char s_size[4]; /* section size */
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char s_scnptr[4]; /* file ptr to raw data for section */
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char s_relptr[4]; /* file ptr to relocation */
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char s_lnnoptr[4]; /* file ptr to line numbers */
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char s_nreloc[2]; /* number of relocation entries */
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char s_nlnno[2]; /* number of line number entries*/
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char s_flags[4]; /* flags */
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};
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/*
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* names of "special" sections
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*/
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#define _TEXT ".text"
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#define _DATA ".data"
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#define _BSS ".bss"
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#define SCNHDR struct external_scnhdr
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#define SCNHSZ 40
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/********************** LINE NUMBERS **********************/
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/* 1 line number entry for every "breakpointable" source line in a section.
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* Line numbers are grouped on a per function basis; first entry in a function
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* grouping will have l_lnno = 0 and in place of physical address will be the
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* symbol table index of the function name.
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*/
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struct external_lineno {
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union {
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char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/
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char l_paddr[4]; /* (physical) address of line number */
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} l_addr;
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char l_lnno[4]; /* line number */
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};
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#define GET_LINENO_LNNO(abfd, ext) bfd_h_get_32(abfd, (bfd_byte *) (ext->l_lnno));
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#define PUT_LINENO_LNNO(abfd,val, ext) bfd_h_put_32(abfd,val, (bfd_byte *) (ext->l_lnno));
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#define LINENO struct external_lineno
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#define LINESZ 8
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/********************** SYMBOLS **********************/
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#define E_SYMNMLEN 8 /* # characters in a symbol name */
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#define E_FILNMLEN 14 /* # characters in a file name */
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#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
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struct external_syment
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{
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union {
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char e_name[E_SYMNMLEN];
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struct {
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char e_zeroes[4];
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char e_offset[4];
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} e;
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} e;
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char e_value[4];
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char e_scnum[2];
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char e_type[2];
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char e_sclass[1];
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char e_numaux[1];
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};
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#define N_BTMASK (017)
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#define N_TMASK (060)
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#define N_BTSHFT (4)
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#define N_TSHIFT (2)
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union external_auxent {
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struct {
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char x_tagndx[4]; /* str, un, or enum tag indx */
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union {
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struct {
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char x_lnno[2]; /* declaration line number */
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char x_size[2]; /* str/union/array size */
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} x_lnsz;
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char x_fsize[4]; /* size of function */
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} x_misc;
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union {
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struct { /* if ISFCN, tag, or .bb */
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char x_lnnoptr[4]; /* ptr to fcn line # */
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char x_endndx[4]; /* entry ndx past block end */
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} x_fcn;
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struct { /* if ISARY, up to 4 dimen. */
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char x_dimen[E_DIMNUM][2];
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} x_ary;
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} x_fcnary;
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char x_tvndx[2]; /* tv index */
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} x_sym;
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union {
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char x_fname[E_FILNMLEN];
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struct {
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char x_zeroes[4];
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char x_offset[4];
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} x_n;
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} x_file;
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struct {
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char x_scnlen[4]; /* section length */
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char x_nreloc[2]; /* # relocation entries */
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char x_nlinno[2]; /* # line numbers */
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} x_scn;
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struct {
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char x_tvfill[4]; /* tv fill value */
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char x_tvlen[2]; /* length of .tv */
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char x_tvran[2][2]; /* tv range */
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} x_tv; /* info about .tv section (in auxent of symbol .tv)) */
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};
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#define SYMENT struct external_syment
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#define SYMESZ 18
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#define AUXENT union external_auxent
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#define AUXESZ 18
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/********************** RELOCATION DIRECTIVES **********************/
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/* The external reloc has an offset field, because some of the reloc
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types on the h8 don't have room in the instruction for the entire
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offset - eg the strange jump and high page addressing modes */
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struct external_reloc {
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char r_vaddr[4];
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char r_symndx[4];
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char r_offset[4];
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char r_type[2];
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char r_stuff[2];
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};
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#define RELOC struct external_reloc
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#define RELSZ 16
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/* SH relocation types. Not all of these are actually used. */
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#define R_SH_UNUSED 0 /* only used internally */
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#define R_SH_PCREL8 3 /* 8 bit pcrel */
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#define R_SH_PCREL16 4 /* 16 bit pcrel */
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#define R_SH_HIGH8 5 /* high 8 bits of 24 bit address */
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#define R_SH_LOW16 7 /* low 16 bits of 24 bit immediate */
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#define R_SH_IMM24 6 /* 24 bit immediate */
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#define R_SH_PCDISP8BY4 9 /* PC rel 8 bits *4 +ve */
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#define R_SH_PCDISP8BY2 10 /* PC rel 8 bits *2 +ve */
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#define R_SH_PCDISP8 11 /* 8 bit branch */
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#define R_SH_PCDISP 12 /* 12 bit branch */
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#define R_SH_IMM32 14 /* 32 bit immediate */
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#define R_SH_IMM8 16 /* 8 bit immediate */
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#define R_SH_IMM8BY2 17 /* 8 bit immediate *2 */
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#define R_SH_IMM8BY4 18 /* 8 bit immediate *4 */
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#define R_SH_IMM4 19 /* 4 bit immediate */
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#define R_SH_IMM4BY2 20 /* 4 bit immediate *2 */
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#define R_SH_IMM4BY4 21 /* 4 bit immediate *4 */
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#define R_SH_PCRELIMM8BY2 22 /* PC rel 8 bits *2 unsigned */
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#define R_SH_PCRELIMM8BY4 23 /* PC rel 8 bits *4 unsigned */
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#define R_SH_IMM16 24 /* 16 bit immediate */
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/* The switch table reloc types are used for relaxing. They are
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generated for expressions such as
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.word L1 - L2
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The r_offset field holds the difference between the reloc address
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and L2. */
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#define R_SH_SWITCH8 33 /* 8 bit switch table entry */
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#define R_SH_SWITCH16 25 /* 16 bit switch table entry */
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#define R_SH_SWITCH32 26 /* 32 bit switch table entry */
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/* The USES reloc type is used for relaxing. The compiler will
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generate .uses pseudo-ops when it finds a function call which it
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can relax. The r_offset field of the USES reloc holds the PC
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relative offset to the instruction which loads the register used in
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the function call. */
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#define R_SH_USES 27 /* .uses pseudo-op */
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/* The COUNT reloc type is used for relaxing. The assembler will
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generate COUNT relocs for addresses referred to by the register
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loads associated with USES relocs. The r_offset field of the COUNT
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reloc holds the number of times the address is referenced in the
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object file. */
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#define R_SH_COUNT 28 /* Count of constant pool uses */
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/* The ALIGN reloc type is used for relaxing. The r_offset field is
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the power of two to which subsequent portions of the object file
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must be aligned. */
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#define R_SH_ALIGN 29 /* .align pseudo-op */
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/* The CODE and DATA reloc types are used for aligning load and store
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instructions. The assembler will generate a CODE reloc before a
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block of instructions. It will generate a DATA reloc before data.
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A section should be processed assuming it contains data, unless a
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CODE reloc is seen. The only relevant pieces of information in the
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CODE and DATA relocs are the section and the address. The symbol
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and offset are meaningless. */
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#define R_SH_CODE 30 /* start of code */
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#define R_SH_DATA 31 /* start of data */
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/* The LABEL reloc type is used for aligning load and store
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instructions. The assembler will generate a LABEL reloc for each
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label within a block of instructions. This permits the linker to
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avoid swapping instructions which are the targets of branches. */
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#define R_SH_LABEL 32 /* label */
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/* NB: R_SH_SWITCH8 is 33 */
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