| /* Generic ECOFF support. |
| This does not include symbol information, found in sym.h and |
| symconst.h. |
| |
| Copyright (C) 2001-2021 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #ifndef ECOFF_H |
| #define ECOFF_H |
| |
| #include "coff/sym.h" |
| |
| /* Mips magic numbers used in filehdr. MIPS_MAGIC_LITTLE is used on |
| little endian machines. MIPS_MAGIC_BIG is used on big endian |
| machines. Where is MIPS_MAGIC_1 from? */ |
| #define MIPS_MAGIC_1 0x0180 |
| #define MIPS_MAGIC_LITTLE 0x0162 |
| #define MIPS_MAGIC_BIG 0x0160 |
| |
| /* These are the magic numbers used for MIPS code compiled at ISA |
| level 2. */ |
| #define MIPS_MAGIC_LITTLE2 0x0166 |
| #define MIPS_MAGIC_BIG2 0x0163 |
| |
| /* These are the magic numbers used for MIPS code compiled at ISA |
| level 3. */ |
| #define MIPS_MAGIC_LITTLE3 0x142 |
| #define MIPS_MAGIC_BIG3 0x140 |
| |
| /* Alpha magic numbers used in filehdr. */ |
| #define ALPHA_MAGIC 0x183 |
| #define ALPHA_MAGIC_BSD 0x185 |
| /* A compressed version of an ALPHA_MAGIC file created by DEC's tools. */ |
| #define ALPHA_MAGIC_COMPRESSED 0x188 |
| |
| /* Magic numbers used in a.out header. */ |
| #define ECOFF_AOUT_OMAGIC 0407 /* not demand paged (ld -N). */ |
| #define ECOFF_AOUT_ZMAGIC 0413 /* demand load format, eg normal ld output */ |
| |
| /* Names of special sections. */ |
| #define _TEXT ".text" |
| #define _DATA ".data" |
| #define _BSS ".bss" |
| #define _RDATA ".rdata" |
| #define _SDATA ".sdata" |
| #define _SBSS ".sbss" |
| #define _LITA ".lita" |
| #define _LIT4 ".lit4" |
| #define _LIT8 ".lit8" |
| #define _LIB ".lib" |
| #define _INIT ".init" |
| #define _FINI ".fini" |
| #define _PDATA ".pdata" |
| #define _XDATA ".xdata" |
| #define _GOT ".got" |
| #define _HASH ".hash" |
| #define _DYNSYM ".dynsym" |
| #define _DYNSTR ".dynstr" |
| #define _RELDYN ".rel.dyn" |
| #define _CONFLIC ".conflic" |
| #define _COMMENT ".comment" |
| #define _LIBLIST ".liblist" |
| #define _DYNAMIC ".dynamic" |
| #define _RCONST ".rconst" |
| |
| /* ECOFF uses some additional section flags. */ |
| #define STYP_RDATA 0x100 |
| #define STYP_SDATA 0x200 |
| #define STYP_SBSS 0x400 |
| #define STYP_GOT 0x1000 |
| #define STYP_DYNAMIC 0x2000 |
| #define STYP_DYNSYM 0x4000 |
| #define STYP_RELDYN 0x8000 |
| #define STYP_DYNSTR 0x10000 |
| #define STYP_HASH 0x20000 |
| #define STYP_LIBLIST 0x40000 |
| #define STYP_CONFLIC 0x100000 |
| #define STYP_ECOFF_FINI 0x1000000 |
| #define STYP_EXTENDESC 0x2000000 /* 0x02FFF000 bits => scn type, rest clr */ |
| #define STYP_LITA 0x4000000 |
| #define STYP_LIT8 0x8000000 |
| #define STYP_LIT4 0x10000000 |
| #define STYP_ECOFF_LIB 0x40000000 |
| #define STYP_ECOFF_INIT 0x80000000 |
| #define STYP_OTHER_LOAD (STYP_ECOFF_INIT | STYP_ECOFF_FINI) |
| |
| /* extended section types */ |
| #define STYP_COMMENT 0x2100000 |
| #define STYP_RCONST 0x2200000 |
| #define STYP_XDATA 0x2400000 |
| #define STYP_PDATA 0x2800000 |
| |
| /* The linker needs a section to hold small common variables while |
| linking. There is no convenient way to create it when the linker |
| needs it, so we always create one for each BFD. We then avoid |
| writing it out. */ |
| #define SCOMMON ".scommon" |
| |
| /* If the extern bit in a reloc is 1, then r_symndx is an index into |
| the external symbol table. If the extern bit is 0, then r_symndx |
| indicates a section, and is one of the following values. */ |
| #define RELOC_SECTION_NONE 0 |
| #define RELOC_SECTION_TEXT 1 |
| #define RELOC_SECTION_RDATA 2 |
| #define RELOC_SECTION_DATA 3 |
| #define RELOC_SECTION_SDATA 4 |
| #define RELOC_SECTION_SBSS 5 |
| #define RELOC_SECTION_BSS 6 |
| #define RELOC_SECTION_INIT 7 |
| #define RELOC_SECTION_LIT8 8 |
| #define RELOC_SECTION_LIT4 9 |
| #define RELOC_SECTION_XDATA 10 |
| #define RELOC_SECTION_PDATA 11 |
| #define RELOC_SECTION_FINI 12 |
| #define RELOC_SECTION_LITA 13 |
| #define RELOC_SECTION_ABS 14 |
| #define RELOC_SECTION_RCONST 15 |
| |
| #define NUM_RELOC_SECTIONS 16 |
| |
| /********************** STABS **********************/ |
| |
| /* gcc uses mips-tfile to output type information in special stabs |
| entries. These must match the corresponding definition in |
| gcc/config/mips.h. At some point, these should probably go into a |
| shared include file, but currently gcc and gdb do not share any |
| directories. */ |
| #define CODE_MASK 0x8F300 |
| #define ECOFF_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) |
| #define ECOFF_MARK_STAB(code) ((code)+CODE_MASK) |
| #define ECOFF_UNMARK_STAB(code) ((code)-CODE_MASK) |
| #define STABS_SYMBOL "@stabs" |
| |
| /********************** COFF **********************/ |
| |
| /* gcc also uses mips-tfile to output COFF debugging information. |
| These are the values it uses when outputting the .type directive. |
| These should also be in a shared include file. */ |
| #define N_BTMASK (017) |
| #define N_TMASK (060) |
| #define N_BTSHFT (4) |
| #define N_TSHIFT (2) |
| |
| /********************** AUX **********************/ |
| |
| /* The auxiliary type information is the same on all known ECOFF |
| targets. I can't see any reason that it would ever change, so I am |
| going to gamble and define the external structures here, in the |
| target independent ECOFF header file. The internal forms are |
| defined in coff/sym.h, which was originally donated by MIPS |
| Computer Systems. */ |
| |
| /* Type information external record */ |
| |
| struct tir_ext { |
| unsigned char t_bits1[1]; |
| unsigned char t_tq45[1]; |
| unsigned char t_tq01[1]; |
| unsigned char t_tq23[1]; |
| }; |
| |
| #define TIR_BITS1_FBITFIELD_BIG ((unsigned int) 0x80) |
| #define TIR_BITS1_FBITFIELD_LITTLE ((unsigned int) 0x01) |
| |
| #define TIR_BITS1_CONTINUED_BIG ((unsigned int) 0x40) |
| #define TIR_BITS1_CONTINUED_LITTLE ((unsigned int) 0x02) |
| |
| #define TIR_BITS1_BT_BIG ((unsigned int) 0x3F) |
| #define TIR_BITS1_BT_SH_BIG 0 |
| #define TIR_BITS1_BT_LITTLE ((unsigned int) 0xFC) |
| #define TIR_BITS1_BT_SH_LITTLE 2 |
| |
| #define TIR_BITS_TQ4_BIG ((unsigned int) 0xF0) |
| #define TIR_BITS_TQ4_SH_BIG 4 |
| #define TIR_BITS_TQ5_BIG ((unsigned int) 0x0F) |
| #define TIR_BITS_TQ5_SH_BIG 0 |
| #define TIR_BITS_TQ4_LITTLE ((unsigned int) 0x0F) |
| #define TIR_BITS_TQ4_SH_LITTLE 0 |
| #define TIR_BITS_TQ5_LITTLE ((unsigned int) 0xF0) |
| #define TIR_BITS_TQ5_SH_LITTLE 4 |
| |
| #define TIR_BITS_TQ0_BIG ((unsigned int) 0xF0) |
| #define TIR_BITS_TQ0_SH_BIG 4 |
| #define TIR_BITS_TQ1_BIG ((unsigned int) 0x0F) |
| #define TIR_BITS_TQ1_SH_BIG 0 |
| #define TIR_BITS_TQ0_LITTLE ((unsigned int) 0x0F) |
| #define TIR_BITS_TQ0_SH_LITTLE 0 |
| #define TIR_BITS_TQ1_LITTLE ((unsigned int) 0xF0) |
| #define TIR_BITS_TQ1_SH_LITTLE 4 |
| |
| #define TIR_BITS_TQ2_BIG ((unsigned int) 0xF0) |
| #define TIR_BITS_TQ2_SH_BIG 4 |
| #define TIR_BITS_TQ3_BIG ((unsigned int) 0x0F) |
| #define TIR_BITS_TQ3_SH_BIG 0 |
| #define TIR_BITS_TQ2_LITTLE ((unsigned int) 0x0F) |
| #define TIR_BITS_TQ2_SH_LITTLE 0 |
| #define TIR_BITS_TQ3_LITTLE ((unsigned int) 0xF0) |
| #define TIR_BITS_TQ3_SH_LITTLE 4 |
| |
| /* Relative symbol external record */ |
| |
| struct rndx_ext { |
| unsigned char r_bits[4]; |
| }; |
| |
| #define RNDX_BITS0_RFD_SH_LEFT_BIG 4 |
| #define RNDX_BITS1_RFD_BIG ((unsigned int) 0xF0) |
| #define RNDX_BITS1_RFD_SH_BIG 4 |
| |
| #define RNDX_BITS0_RFD_SH_LEFT_LITTLE 0 |
| #define RNDX_BITS1_RFD_LITTLE ((unsigned int) 0x0F) |
| #define RNDX_BITS1_RFD_SH_LEFT_LITTLE 8 |
| |
| #define RNDX_BITS1_INDEX_BIG ((unsigned int) 0x0F) |
| #define RNDX_BITS1_INDEX_SH_LEFT_BIG 16 |
| #define RNDX_BITS2_INDEX_SH_LEFT_BIG 8 |
| #define RNDX_BITS3_INDEX_SH_LEFT_BIG 0 |
| |
| #define RNDX_BITS1_INDEX_LITTLE ((unsigned int) 0xF0) |
| #define RNDX_BITS1_INDEX_SH_LITTLE 4 |
| #define RNDX_BITS2_INDEX_SH_LEFT_LITTLE 4 |
| #define RNDX_BITS3_INDEX_SH_LEFT_LITTLE 12 |
| |
| /* Auxiliary symbol information external record */ |
| |
| union aux_ext { |
| struct tir_ext a_ti; |
| struct rndx_ext a_rndx; |
| unsigned char a_dnLow[4]; |
| unsigned char a_dnHigh[4]; |
| unsigned char a_isym[4]; |
| unsigned char a_iss[4]; |
| unsigned char a_width[4]; |
| unsigned char a_count[4]; |
| }; |
| |
| #define AUX_GET_ANY(bigend, ax, field) \ |
| ((bigend) ? bfd_getb32 ((ax)->field) : bfd_getl32 ((ax)->field)) |
| |
| #define AUX_GET_DNLOW(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_dnLow) |
| #define AUX_GET_DNHIGH(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_dnHigh) |
| #define AUX_GET_ISYM(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_isym) |
| #define AUX_GET_ISS(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_iss) |
| #define AUX_GET_WIDTH(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_width) |
| #define AUX_GET_COUNT(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_count) |
| |
| #define AUX_PUT_ANY(bigend, val, ax, field) \ |
| ((bigend) \ |
| ? (bfd_putb32 ((bfd_vma) (val), (ax)->field), 0) \ |
| : (bfd_putl32 ((bfd_vma) (val), (ax)->field), 0)) |
| |
| #define AUX_PUT_DNLOW(bigend, val, ax) \ |
| AUX_PUT_ANY ((bigend), (val), (ax), a_dnLow) |
| #define AUX_PUT_DNHIGH(bigend, val, ax) \ |
| AUX_PUT_ANY ((bigend), (val), (ax), a_dnHigh) |
| #define AUX_PUT_ISYM(bigend, val, ax) \ |
| AUX_PUT_ANY ((bigend), (val), (ax), a_isym) |
| #define AUX_PUT_ISS(bigend, val, ax) \ |
| AUX_PUT_ANY ((bigend), (val), (ax), a_iss) |
| #define AUX_PUT_WIDTH(bigend, val, ax) \ |
| AUX_PUT_ANY ((bigend), (val), (ax), a_width) |
| #define AUX_PUT_COUNT(bigend, val, ax) \ |
| AUX_PUT_ANY ((bigend), (val), (ax), a_count) |
| |
| /********************** SYMBOLS **********************/ |
| |
| /* For efficiency, gdb deals directly with the unswapped symbolic |
| information (that way it only takes the time to swap information |
| that it really needs to read). gdb originally retrieved the |
| information directly from the BFD backend information, but that |
| strategy, besides being sort of ugly, does not work for MIPS ELF, |
| which also uses ECOFF debugging information. This structure holds |
| pointers to the (mostly) unswapped symbolic information. */ |
| |
| struct ecoff_debug_info |
| { |
| /* The swapped ECOFF symbolic header. */ |
| HDRR symbolic_header; |
| |
| /* Pointers to the unswapped symbolic information. Note that the |
| pointers to external structures point to different sorts of |
| information on different ECOFF targets. The ecoff_debug_swap |
| structure provides the sizes of the structures and the functions |
| needed to swap the information in and out. These pointers are |
| all pointers to arrays, not single structures. They will be NULL |
| if there are no instances of the relevant structure. These |
| fields are also used by the assembler to output ECOFF debugging |
| information. */ |
| unsigned char *line; |
| void *external_dnr; /* struct dnr_ext */ |
| void *external_pdr; /* struct pdr_ext */ |
| void *external_sym; /* struct sym_ext */ |
| void *external_opt; /* struct opt_ext */ |
| union aux_ext *external_aux; |
| char *ss; |
| char *ssext; |
| void *external_fdr; /* struct fdr_ext */ |
| void *external_rfd; /* struct rfd_ext */ |
| void *external_ext; /* struct ext_ext */ |
| |
| /* These fields are used when linking. They may disappear at some |
| point. */ |
| char *ssext_end; |
| void *external_ext_end; |
| |
| /* When linking, this field holds a mapping from the input FDR |
| numbers to the output numbers, and is used when writing out the |
| external symbols. It is NULL if no mapping is required. */ |
| RFDT *ifdmap; |
| |
| /* The swapped FDR information. Currently this is never NULL, but |
| code using this structure should probably double-check in case |
| this changes in the future. This is a pointer to an array, not a |
| single structure. */ |
| FDR *fdr; |
| }; |
| |
| /* These structures are used by the ECOFF find_nearest_line function. */ |
| |
| struct ecoff_fdrtab_entry |
| { |
| /* Base address in .text of this FDR. */ |
| bfd_vma base_addr; |
| FDR *fdr; |
| }; |
| |
| struct ecoff_find_line |
| { |
| /* Allocated memory to hold function and file names. */ |
| char *find_buffer; |
| |
| /* FDR table, sorted by address: */ |
| long fdrtab_len; |
| struct ecoff_fdrtab_entry *fdrtab; |
| |
| /* Cache entry for most recently found line information. The sect |
| field is NULL if this cache does not contain valid information. */ |
| struct |
| { |
| asection *sect; |
| bfd_vma start; |
| bfd_vma stop; |
| const char *filename; |
| const char *functionname; |
| unsigned int line_num; |
| } cache; |
| }; |
| |
| /********************** SWAPPING **********************/ |
| |
| /* The generic ECOFF code needs to be able to swap debugging |
| information in and out in the specific format used by a particular |
| ECOFF implementation. This structure provides the information |
| needed to do this. */ |
| |
| struct ecoff_debug_swap |
| { |
| /* Symbol table magic number. */ |
| int sym_magic; |
| /* Alignment of debugging information. E.g., 4. */ |
| bfd_size_type debug_align; |
| /* Sizes of external symbolic information. */ |
| bfd_size_type external_hdr_size; |
| bfd_size_type external_dnr_size; |
| bfd_size_type external_pdr_size; |
| bfd_size_type external_sym_size; |
| bfd_size_type external_opt_size; |
| bfd_size_type external_fdr_size; |
| bfd_size_type external_rfd_size; |
| bfd_size_type external_ext_size; |
| /* Functions to swap in external symbolic data. */ |
| void (*swap_hdr_in) (bfd *, void *, HDRR *); |
| void (*swap_dnr_in) (bfd *, void *, DNR *); |
| void (*swap_pdr_in) (bfd *, void *, PDR *); |
| void (*swap_sym_in) (bfd *, void *, SYMR *); |
| void (*swap_opt_in) (bfd *, void *, OPTR *); |
| void (*swap_fdr_in) (bfd *, void *, FDR *); |
| void (*swap_rfd_in) (bfd *, void *, RFDT *); |
| void (*swap_ext_in) (bfd *, void *, EXTR *); |
| void (*swap_tir_in) (int, const struct tir_ext *, TIR *); |
| void (*swap_rndx_in) (int, const struct rndx_ext *, RNDXR *); |
| /* Functions to swap out external symbolic data. */ |
| void (*swap_hdr_out) (bfd *, const HDRR *, void *); |
| void (*swap_dnr_out) (bfd *, const DNR *, void *); |
| void (*swap_pdr_out) (bfd *, const PDR *, void *); |
| void (*swap_sym_out) (bfd *, const SYMR *, void *); |
| void (*swap_opt_out) (bfd *, const OPTR *, void *); |
| void (*swap_fdr_out) (bfd *, const FDR *, void *); |
| void (*swap_rfd_out) (bfd *, const RFDT *, void *); |
| void (*swap_ext_out) (bfd *, const EXTR *, void *); |
| void (*swap_tir_out) (int, const TIR *, struct tir_ext *); |
| void (*swap_rndx_out) (int, const RNDXR *, struct rndx_ext *); |
| /* Function to read symbol data and set up pointers in |
| ecoff_debug_info structure. The section argument is used for |
| ELF, not straight ECOFF. */ |
| bool (*read_debug_info) (bfd *, asection *, struct ecoff_debug_info *); |
| }; |
| |
| #endif /* ! defined (ECOFF_H) */ |
