forked from KolibriOS/kolibrios
412 lines
14 KiB
C
412 lines
14 KiB
C
/* Generic ECOFF support.
|
|
This does not include symbol information, found in sym.h and
|
|
symconst.h.
|
|
|
|
Copyright (C) 2001-2015 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
|
|
|
|
/* 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. */
|
|
bfd_boolean (*read_debug_info) (bfd *, asection *, struct ecoff_debug_info *);
|
|
};
|
|
|
|
#endif /* ! defined (ECOFF_H) */
|