URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [branches/] [oc/] [gdb-5.0/] [include/] [coff/] [mips.h] - Rev 1765
Compare with Previous | Blame | View Log
/* ECOFF support on MIPS machines. coff/ecoff.h must be included before this file. */ /********************** FILE HEADER **********************/ struct external_filehdr { unsigned char f_magic[2]; /* magic number */ unsigned char f_nscns[2]; /* number of sections */ unsigned char f_timdat[4]; /* time & date stamp */ unsigned char f_symptr[4]; /* file pointer to symtab */ unsigned char f_nsyms[4]; /* number of symtab entries */ unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ unsigned char f_flags[2]; /* flags */ }; /* Magic numbers are defined in coff/ecoff.h. */ #define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \ ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\ ((x).f_magic!=MIPS_MAGIC_BIG) && \ ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \ ((x).f_magic!=MIPS_MAGIC_BIG2) && \ ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \ ((x).f_magic!=MIPS_MAGIC_BIG3)) #define FILHDR struct external_filehdr #define FILHSZ 20 /********************** AOUT "OPTIONAL HEADER" **********************/ typedef struct external_aouthdr { unsigned char magic[2]; /* type of file */ unsigned char vstamp[2]; /* version stamp */ unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/ unsigned char dsize[4]; /* initialized data " " */ unsigned char bsize[4]; /* uninitialized data " " */ unsigned char entry[4]; /* entry pt. */ unsigned char text_start[4]; /* base of text used for this file */ unsigned char data_start[4]; /* base of data used for this file */ unsigned char bss_start[4]; /* base of bss used for this file */ unsigned char gprmask[4]; /* ?? */ unsigned char cprmask[4][4]; /* ?? */ unsigned char gp_value[4]; /* value for gp register */ } AOUTHDR; /* compute size of a header */ #define AOUTSZ 56 #define AOUTHDRSZ 56 /********************** SECTION HEADER **********************/ struct external_scnhdr { unsigned char s_name[8]; /* section name */ unsigned char s_paddr[4]; /* physical address, aliased s_nlib */ unsigned char s_vaddr[4]; /* virtual address */ unsigned char s_size[4]; /* section size */ unsigned char s_scnptr[4]; /* file ptr to raw data for section */ unsigned char s_relptr[4]; /* file ptr to relocation */ unsigned char s_lnnoptr[4]; /* file ptr to line numbers */ unsigned char s_nreloc[2]; /* number of relocation entries */ unsigned char s_nlnno[2]; /* number of line number entries*/ unsigned char s_flags[4]; /* flags */ }; #define SCNHDR struct external_scnhdr #define SCNHSZ 40 /********************** RELOCATION DIRECTIVES **********************/ struct external_reloc { unsigned char r_vaddr[4]; unsigned char r_bits[4]; }; #define RELOC struct external_reloc #define RELSZ 8 /* MIPS ECOFF uses a packed 8 byte format for relocs. These constants are used to unpack the r_bits field. */ #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16 #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0 #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8 #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8 #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0 #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16 /* Originally, ECOFF used four bits for the reloc type and had three reserved bits. Irix 4 added another bit for the reloc type, which was easy because it was big endian and one of the spare bits became the new most significant bit. To make this also work for little endian ECOFF, we need to wrap one of the reserved bits around to become the most significant bit of the reloc type. */ #define RELOC_BITS3_TYPE_BIG 0x3E #define RELOC_BITS3_TYPE_SH_BIG 1 #define RELOC_BITS3_TYPE_LITTLE 0x78 #define RELOC_BITS3_TYPE_SH_LITTLE 3 #define RELOC_BITS3_TYPEHI_LITTLE 0x04 #define RELOC_BITS3_TYPEHI_SH_LITTLE 2 #define RELOC_BITS3_EXTERN_BIG 0x01 #define RELOC_BITS3_EXTERN_LITTLE 0x80 /* The r_type field in a reloc is one of the following values. I don't know if any other values can appear. These seem to be all that occur in the Ultrix 4.2 libraries. */ #define MIPS_R_IGNORE 0 #define MIPS_R_REFHALF 1 #define MIPS_R_REFWORD 2 #define MIPS_R_JMPADDR 3 #define MIPS_R_REFHI 4 #define MIPS_R_REFLO 5 #define MIPS_R_GPREL 6 #define MIPS_R_LITERAL 7 /* These reloc types are a Cygnus extension used when generating position independent code for embedded systems. The numbers are taken from Irix 4, but at least for internal relocs Irix 5 does not give them the same meaning. For an internal reloc the symbol index of RELHI and RELLO is modified as described below for MIPS_R_SWITCH. */ #define MIPS_R_PCREL16 12 #define MIPS_R_RELHI 13 #define MIPS_R_RELLO 14 /* This reloc type is a Cygnus extension used when generating position independent code for embedded systems. It is used for an entry in a switch table, which looks like this: .word $L3-$LS12 The object file will contain the correct difference, and does not require adjustment. However, when the linker is relaxing PC relative calls, it is possible for $L3 to move farther away. This reloc always appears in the .text section, and is always against the .text section. However, the symbol index is not RELOC_SECTION_TEXT. It is, instead, the distance between this switch table entry and $LS12. Thus, the original value of $L12 is vaddr - symndx and the original value of $L3 is vaddr - symndx + addend where addend is the value in the object file. Knowing this, the linker can know whether the addend in the object file must be adjusted. */ #define MIPS_R_SWITCH 22 /********************** STABS **********************/ #define MIPS_IS_STAB ECOFF_IS_STAB #define MIPS_MARK_STAB ECOFF_MARK_STAB #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB /********************** SYMBOLIC INFORMATION **********************/ /* Written by John Gilmore. */ /* ECOFF uses COFF-like section structures, but its own symbol format. This file defines the symbol format in fields whose size and alignment will not vary on different host systems. */ /* File header as a set of bytes */ struct hdr_ext { unsigned char h_magic[2]; unsigned char h_vstamp[2]; unsigned char h_ilineMax[4]; unsigned char h_cbLine[4]; unsigned char h_cbLineOffset[4]; unsigned char h_idnMax[4]; unsigned char h_cbDnOffset[4]; unsigned char h_ipdMax[4]; unsigned char h_cbPdOffset[4]; unsigned char h_isymMax[4]; unsigned char h_cbSymOffset[4]; unsigned char h_ioptMax[4]; unsigned char h_cbOptOffset[4]; unsigned char h_iauxMax[4]; unsigned char h_cbAuxOffset[4]; unsigned char h_issMax[4]; unsigned char h_cbSsOffset[4]; unsigned char h_issExtMax[4]; unsigned char h_cbSsExtOffset[4]; unsigned char h_ifdMax[4]; unsigned char h_cbFdOffset[4]; unsigned char h_crfd[4]; unsigned char h_cbRfdOffset[4]; unsigned char h_iextMax[4]; unsigned char h_cbExtOffset[4]; }; /* File descriptor external record */ struct fdr_ext { unsigned char f_adr[4]; unsigned char f_rss[4]; unsigned char f_issBase[4]; unsigned char f_cbSs[4]; unsigned char f_isymBase[4]; unsigned char f_csym[4]; unsigned char f_ilineBase[4]; unsigned char f_cline[4]; unsigned char f_ioptBase[4]; unsigned char f_copt[4]; unsigned char f_ipdFirst[2]; unsigned char f_cpd[2]; unsigned char f_iauxBase[4]; unsigned char f_caux[4]; unsigned char f_rfdBase[4]; unsigned char f_crfd[4]; unsigned char f_bits1[1]; unsigned char f_bits2[3]; unsigned char f_cbLineOffset[4]; unsigned char f_cbLine[4]; }; #define FDR_BITS1_LANG_BIG 0xF8 #define FDR_BITS1_LANG_SH_BIG 3 #define FDR_BITS1_LANG_LITTLE 0x1F #define FDR_BITS1_LANG_SH_LITTLE 0 #define FDR_BITS1_FMERGE_BIG 0x04 #define FDR_BITS1_FMERGE_LITTLE 0x20 #define FDR_BITS1_FREADIN_BIG 0x02 #define FDR_BITS1_FREADIN_LITTLE 0x40 #define FDR_BITS1_FBIGENDIAN_BIG 0x01 #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 #define FDR_BITS2_GLEVEL_BIG 0xC0 #define FDR_BITS2_GLEVEL_SH_BIG 6 #define FDR_BITS2_GLEVEL_LITTLE 0x03 #define FDR_BITS2_GLEVEL_SH_LITTLE 0 /* We ignore the `reserved' field in bits2. */ /* Procedure descriptor external record */ struct pdr_ext { unsigned char p_adr[4]; unsigned char p_isym[4]; unsigned char p_iline[4]; unsigned char p_regmask[4]; unsigned char p_regoffset[4]; unsigned char p_iopt[4]; unsigned char p_fregmask[4]; unsigned char p_fregoffset[4]; unsigned char p_frameoffset[4]; unsigned char p_framereg[2]; unsigned char p_pcreg[2]; unsigned char p_lnLow[4]; unsigned char p_lnHigh[4]; unsigned char p_cbLineOffset[4]; }; /* Runtime procedure table */ struct rpdr_ext { unsigned char p_adr[4]; unsigned char p_regmask[4]; unsigned char p_regoffset[4]; unsigned char p_fregmask[4]; unsigned char p_fregoffset[4]; unsigned char p_frameoffset[4]; unsigned char p_framereg[2]; unsigned char p_pcreg[2]; unsigned char p_irpss[4]; unsigned char p_reserved[4]; unsigned char p_exception_info[4]; }; /* Line numbers */ struct line_ext { unsigned char l_line[4]; }; /* Symbol external record */ struct sym_ext { unsigned char s_iss[4]; unsigned char s_value[4]; unsigned char s_bits1[1]; unsigned char s_bits2[1]; unsigned char s_bits3[1]; unsigned char s_bits4[1]; }; #define SYM_BITS1_ST_BIG 0xFC #define SYM_BITS1_ST_SH_BIG 2 #define SYM_BITS1_ST_LITTLE 0x3F #define SYM_BITS1_ST_SH_LITTLE 0 #define SYM_BITS1_SC_BIG 0x03 #define SYM_BITS1_SC_SH_LEFT_BIG 3 #define SYM_BITS1_SC_LITTLE 0xC0 #define SYM_BITS1_SC_SH_LITTLE 6 #define SYM_BITS2_SC_BIG 0xE0 #define SYM_BITS2_SC_SH_BIG 5 #define SYM_BITS2_SC_LITTLE 0x07 #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 #define SYM_BITS2_RESERVED_BIG 0x10 #define SYM_BITS2_RESERVED_LITTLE 0x08 #define SYM_BITS2_INDEX_BIG 0x0F #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 #define SYM_BITS2_INDEX_LITTLE 0xF0 #define SYM_BITS2_INDEX_SH_LITTLE 4 #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 /* External symbol external record */ struct ext_ext { unsigned char es_bits1[1]; unsigned char es_bits2[1]; unsigned char es_ifd[2]; struct sym_ext es_asym; }; #define EXT_BITS1_JMPTBL_BIG 0x80 #define EXT_BITS1_JMPTBL_LITTLE 0x01 #define EXT_BITS1_COBOL_MAIN_BIG 0x40 #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 #define EXT_BITS1_WEAKEXT_BIG 0x20 #define EXT_BITS1_WEAKEXT_LITTLE 0x04 /* Dense numbers external record */ struct dnr_ext { unsigned char d_rfd[4]; unsigned char d_index[4]; }; /* Relative file descriptor */ struct rfd_ext { unsigned char rfd[4]; }; /* Optimizer symbol external record */ struct opt_ext { unsigned char o_bits1[1]; unsigned char o_bits2[1]; unsigned char o_bits3[1]; unsigned char o_bits4[1]; struct rndx_ext o_rndx; unsigned char o_offset[4]; }; #define OPT_BITS2_VALUE_SH_LEFT_BIG 16 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0 #define OPT_BITS3_VALUE_SH_LEFT_BIG 8 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8 #define OPT_BITS4_VALUE_SH_LEFT_BIG 0 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16