diff options
Diffstat (limited to 'include/coff/arm.h')
| -rw-r--r-- | include/coff/arm.h | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/include/coff/arm.h b/include/coff/arm.h new file mode 100644 index 00000000000..dd578b1a76a --- /dev/null +++ b/include/coff/arm.h @@ -0,0 +1,258 @@ +/*** coff information for the ARM */ + +#define COFFARM 1 + +/********************** 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 */ +}; + +/* Bits for f_flags: + * F_RELFLG relocation info stripped from file + * F_EXEC file is executable (no unresolved external references) + * F_LNNO line numbers stripped from file + * F_LSYMS local symbols stripped from file + * F_INTERWORK file supports switching between ARM and Thumb instruction sets + * F_INTERWORK_SET the F_INTERWORK bit is valid + * F_APCS_FLOAT code passes float arguments in float registers + * F_PIC code is reentrant/position-independent + * F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax) + * F_APCS_26 file uses 26 bit ARM Procedure Calling Standard + * F_APCS_SET the F_APCS_26, F_APCS_FLOAT and F_PIC bits have been initialised + */ + +#define F_RELFLG (0x0001) +#define F_EXEC (0x0002) +#define F_LNNO (0x0004) +#define F_LSYMS (0x0008) +#define F_INTERWORK (0x0010) +#define F_INTERWORK_SET (0x0020) +#define F_APCS_FLOAT (0x0040) +#undef F_AR16WR +#define F_PIC (0x0080) +#define F_AR32WR (0x0100) +#define F_APCS_26 (0x0400) +#define F_APCS_SET (0x0800) + +/* Bits stored in flags field of the internal_f structure */ + +#define F_INTERWORK (0x0010) +#define F_PIC_INT (0x0020) +#define F_APCS_FLOAT (0x0040) +#define F_ARM_ARCHITECTURE_MASK (0x0c00) +#define F_ARM_2 (0x0000) +#define F_ARM_2a (0x0000) +#define F_ARM_3 (0x0400) +#define F_ARM_3M (0x0400) +#define F_ARM_4 (0x0800) +#define F_ARM_4T (0x0c00) +#define F_APCS26 (0x4000) + +/* + * ARMMAGIC ought to encoded the procesor type, + * but it is too late to change it now, instead + * the flags field of the internal_f structure + * is used as shown above. + * + * XXX - NC 5/6/97 + */ + +#define ARMMAGIC 0xa00 /* I just made this up */ + +#define ARMBADMAG(x) (((x).f_magic != ARMMAGIC)) + +#define FILHDR struct external_filehdr +#define FILHSZ 20 + + +/********************** AOUT "OPTIONAL HEADER" **********************/ + + +typedef struct +{ + char magic[2]; /* type of file */ + 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 AOUTSZ 28 +#define AOUTHDRSZ 28 + +#define OMAGIC 0404 /* object files, eg as output */ +#define ZMAGIC 0413 /* demand load format, eg normal ld output */ +#define STMAGIC 0401 /* target shlib */ +#define SHMAGIC 0443 /* host shlib */ + + +/* define some NT default values */ +/* #define NT_IMAGE_BASE 0x400000 moved to internal.h */ +#define NT_SECTION_ALIGNMENT 0x1000 +#define NT_FILE_ALIGNMENT 0x200 +#define NT_DEF_RESERVE 0x100000 +#define NT_DEF_COMMIT 0x1000 + +/********************** SECTION HEADER **********************/ + + +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 */ + 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[4]; /* flags */ +}; + +#define SCNHDR struct external_scnhdr +#define SCNHSZ 40 + +/* + * names of "special" sections + */ +#define _TEXT ".text" +#define _DATA ".data" +#define _BSS ".bss" +#define _COMMENT ".comment" +#define _LIB ".lib" + +/* We use the .rdata section to hold read only data. */ +#define _LIT ".rdata" + +/********************** 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 **********************/ + +#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 (0xf) +#define N_TMASK (0x30) +#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 */ + char x_checksum[4]; /* section COMDAT checksum */ + char x_associated[2]; /* COMDAT associated section index */ + char x_comdat[1]; /* COMDAT selection number */ + } 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 + + +# define _ETEXT "etext" + + +/********************** RELOCATION DIRECTIVES **********************/ + + + +struct external_reloc { + char r_vaddr[4]; + char r_symndx[4]; + char r_type[2]; + char r_offset[4]; +}; + + +#define RELOC struct external_reloc +#define RELSZ 14 |