353 lines
13 KiB
C
353 lines
13 KiB
C
#ifndef ECOFF_H
|
|
#define ECOFF_H
|
|
|
|
/* Generic ECOFF support.
|
|
This does not include symbol information, found in sym.h and
|
|
symconst.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
|
|
|
|
/* 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"
|
|
|
|
/* ECOFF uses some additional section flags. */
|
|
#define STYP_RDATA 0x100
|
|
#define STYP_SDATA 0x200
|
|
#define STYP_SBSS 0x400
|
|
#define STYP_ECOFF_FINI 0x1000000
|
|
#define STYP_LITA 0x4000000
|
|
#define STYP_LIT8 0x8000000
|
|
#define STYP_LIT4 0x10000000
|
|
#define STYP_ECOFF_INIT 0x80000000
|
|
#define STYP_OTHER_LOAD (STYP_ECOFF_INIT | STYP_ECOFF_FINI)
|
|
|
|
/* 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"
|
|
|
|
/* The ECOFF a.out header carries information about register masks and
|
|
the gp value. The assembler needs to be able to write out this
|
|
information, and objcopy needs to be able to copy it from one file
|
|
to another. To handle this in BFD, we use a dummy section to hold
|
|
the information. We call this section .reginfo, since MIPS ELF has
|
|
a .reginfo section which serves a similar purpose. When BFD
|
|
recognizes an ECOFF object, it copies the information into a
|
|
private data structure. When the .reginfo section is read, the
|
|
information is retrieved from the private data structure. When the
|
|
.reginfo section is written, the information in the private data
|
|
structure is updated. The contents of the .reginfo section, as
|
|
seen by programs outside BFD, is a ecoff_reginfo structure. The
|
|
contents of the structure are as seen on the host, so no swapping
|
|
issues arise.
|
|
|
|
The assembler used to update the private BFD data structures
|
|
directly. With this approach, it instead just creates a .reginfo
|
|
section and updates that. The real advantage of this approach is
|
|
that objcopy works automatically. */
|
|
#define REGINFO ".reginfo"
|
|
struct ecoff_reginfo
|
|
{
|
|
bfd_vma gp_value; /* GP register value. */
|
|
unsigned long gprmask; /* General registers used. */
|
|
unsigned long cprmask[4]; /* Coprocessor registers used. */
|
|
unsigned long fprmask; /* Floating pointer registers used. */
|
|
};
|
|
|
|
/* 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
|
|
|
|
/********************** 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 0x80
|
|
#define TIR_BITS1_FBITFIELD_LITTLE 0x01
|
|
|
|
#define TIR_BITS1_CONTINUED_BIG 0x40
|
|
#define TIR_BITS1_CONTINUED_LITTLE 0x02
|
|
|
|
#define TIR_BITS1_BT_BIG 0x3F
|
|
#define TIR_BITS1_BT_SH_BIG 0
|
|
#define TIR_BITS1_BT_LITTLE 0xFC
|
|
#define TIR_BITS1_BT_SH_LITTLE 2
|
|
|
|
#define TIR_BITS_TQ4_BIG 0xF0
|
|
#define TIR_BITS_TQ4_SH_BIG 4
|
|
#define TIR_BITS_TQ5_BIG 0x0F
|
|
#define TIR_BITS_TQ5_SH_BIG 0
|
|
#define TIR_BITS_TQ4_LITTLE 0x0F
|
|
#define TIR_BITS_TQ4_SH_LITTLE 0
|
|
#define TIR_BITS_TQ5_LITTLE 0xF0
|
|
#define TIR_BITS_TQ5_SH_LITTLE 4
|
|
|
|
#define TIR_BITS_TQ0_BIG 0xF0
|
|
#define TIR_BITS_TQ0_SH_BIG 4
|
|
#define TIR_BITS_TQ1_BIG 0x0F
|
|
#define TIR_BITS_TQ1_SH_BIG 0
|
|
#define TIR_BITS_TQ0_LITTLE 0x0F
|
|
#define TIR_BITS_TQ0_SH_LITTLE 0
|
|
#define TIR_BITS_TQ1_LITTLE 0xF0
|
|
#define TIR_BITS_TQ1_SH_LITTLE 4
|
|
|
|
#define TIR_BITS_TQ2_BIG 0xF0
|
|
#define TIR_BITS_TQ2_SH_BIG 4
|
|
#define TIR_BITS_TQ3_BIG 0x0F
|
|
#define TIR_BITS_TQ3_SH_BIG 0
|
|
#define TIR_BITS_TQ2_LITTLE 0x0F
|
|
#define TIR_BITS_TQ2_SH_LITTLE 0
|
|
#define TIR_BITS_TQ3_LITTLE 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 0xF0
|
|
#define RNDX_BITS1_RFD_SH_BIG 4
|
|
|
|
#define RNDX_BITS0_RFD_SH_LEFT_LITTLE 0
|
|
#define RNDX_BITS1_RFD_LITTLE 0x0F
|
|
#define RNDX_BITS1_RFD_SH_LEFT_LITTLE 8
|
|
|
|
#define RNDX_BITS1_INDEX_BIG 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 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)
|
|
|
|
/* Prototypes for the swapping functions. These require that sym.h be
|
|
included before this file. */
|
|
|
|
extern void ecoff_swap_tir_in PARAMS ((int bigend, struct tir_ext *, TIR *));
|
|
extern void ecoff_swap_tir_out PARAMS ((int bigend, TIR *, struct tir_ext *));
|
|
extern void ecoff_swap_rndx_in PARAMS ((int bigend, struct rndx_ext *,
|
|
RNDXR *));
|
|
extern void ecoff_swap_rndx_out PARAMS ((int bigend, RNDXR *,
|
|
struct rndx_ext *));
|
|
|
|
/********************** 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) PARAMS ((bfd *, PTR, HDRR *));
|
|
void (*swap_dnr_in) PARAMS ((bfd *, PTR, DNR *));
|
|
void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *));
|
|
void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *));
|
|
void (*swap_opt_in) PARAMS ((bfd *, PTR, OPTR *));
|
|
void (*swap_fdr_in) PARAMS ((bfd *, PTR, FDR *));
|
|
void (*swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *));
|
|
void (*swap_ext_in) PARAMS ((bfd *, PTR, EXTR *));
|
|
/* Functions to swap out external symbolic data. */
|
|
void (*swap_hdr_out) PARAMS ((bfd *, const HDRR *, PTR));
|
|
void (*swap_dnr_out) PARAMS ((bfd *, const DNR *, PTR));
|
|
void (*swap_pdr_out) PARAMS ((bfd *, const PDR *, PTR));
|
|
void (*swap_sym_out) PARAMS ((bfd *, const SYMR *, PTR));
|
|
void (*swap_opt_out) PARAMS ((bfd *, const OPTR *, PTR));
|
|
void (*swap_fdr_out) PARAMS ((bfd *, const FDR *, PTR));
|
|
void (*swap_rfd_out) PARAMS ((bfd *, const RFDT *, PTR));
|
|
void (*swap_ext_out) PARAMS ((bfd *, const EXTR *, PTR));
|
|
/* As noted above, it so happens that the auxiliary type information
|
|
has the same type and format for all known ECOFF targets. I don't
|
|
see any reason that that should change, so at least for now the
|
|
auxiliary swapping information is not in this table. */
|
|
};
|
|
|
|
/********************** 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. */
|
|
unsigned char *line;
|
|
PTR external_dnr; /* struct dnr_ext */
|
|
PTR external_pdr; /* struct pdr_ext */
|
|
PTR external_sym; /* struct sym_ext */
|
|
PTR external_opt; /* struct opt_ext */
|
|
union aux_ext *external_aux;
|
|
char *ss;
|
|
char *ssext;
|
|
PTR external_fdr; /* struct fdr_ext */
|
|
PTR external_rfd; /* struct rfd_ext */
|
|
PTR external_ext; /* struct ext_ext */
|
|
|
|
/* 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;
|
|
};
|
|
|
|
#endif /* ! defined (ECOFF_H) */
|