* mips.h (struct ecoff_debug_info): Define.
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Ian Lance Taylor
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c96451db27
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2 changed files with 164 additions and 3 deletions
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@ -1,3 +1,33 @@
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Wed Nov 17 17:18:16 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
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* mips.h (struct ecoff_debug_info): Define.
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Tue Nov 2 17:56:57 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
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* ecoff.h (struct ecoff_debug_swap): Define.
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Thu Oct 28 17:07:50 1993 Stan Shebs (shebs@rtl.cygnus.com)
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* i386.h (I386LYNXMAGIC): Rename to LYNXCOFFMAGIC.
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* m68k.h (LYNXCOFFMAGIC): Define.
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* sparc.h: New file.
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Tue Oct 19 15:34:50 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
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* alpha.h (external_aouthdr): Split four byte padding field into
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two byte bldrev field and two byte padding field.
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* ecoff.h (_LITA, _PDATA, _XDATA, STYP_LITA): Defined.
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Wed Oct 13 15:52:34 1993 Ken Raeburn (raeburn@cygnus.com)
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Sun Oct 10 17:27:10 1993 Troy Rollo (troy@cbme.unsw.edu.au)
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* coff/internal.h: Added o_sri, o_inlib and o_vid for Apollos
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as well as R_DIR16.
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* coff/apollo.h: New file
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Mon Oct 11 17:16:48 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
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* ecoff.h (REGINFO, struct ecoff_reginfo): Define.
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@ -12,6 +12,16 @@
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#define MIPS_MAGIC_LITTLE 0x0162
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#define MIPS_MAGIC_BIG 0x0160
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/* These are the magic numbers used for MIPS code compiled at ISA
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level 2. */
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#define MIPS_MAGIC_LITTLE2 0x0166
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#define MIPS_MAGIC_BIG2 0x0163
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/* These are the magic numbers used for MIPS code compiled at ISA
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level 3. */
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#define MIPS_MAGIC_LITTLE3 0x142
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#define MIPS_MAGIC_BIG3 0x140
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/* Alpha magic numbers used in filehdr. */
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#define ALPHA_MAGIC 0x183
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@ -26,19 +36,25 @@
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#define _RDATA ".rdata"
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#define _SDATA ".sdata"
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#define _SBSS ".sbss"
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#define _LITA ".lita"
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#define _LIT4 ".lit4"
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#define _LIT8 ".lit8"
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#define _LIB ".lib"
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#define _INIT ".init"
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#define _FINI ".fini"
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#define _PDATA ".pdata"
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#define _XDATA ".xdata"
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/* ECOFF uses some additional section flags. */
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#define STYP_RDATA 0x100
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#define STYP_SDATA 0x200
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#define STYP_SBSS 0x400
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#define STYP_ECOFF_FINI 0x1000000
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#define STYP_LITA 0x4000000
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#define STYP_LIT8 0x8000000
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#define STYP_LIT4 0x10000000
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#define STYP_ECOFF_INIT 0x80000000
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#define STYP_OTHER_LOAD STYP_ECOFF_INIT
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#define STYP_OTHER_LOAD (STYP_ECOFF_INIT | STYP_ECOFF_FINI)
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/* The linker needs a section to hold small common variables while
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linking. There is no convenient way to create it when the linker
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@ -46,6 +62,34 @@
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writing it out. */
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#define SCOMMON ".scommon"
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/* The ECOFF a.out header carries information about register masks and
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the gp value. The assembler needs to be able to write out this
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information, and objcopy needs to be able to copy it from one file
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to another. To handle this in BFD, we use a dummy section to hold
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the information. We call this section .reginfo, since MIPS ELF has
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a .reginfo section which serves a similar purpose. When BFD
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recognizes an ECOFF object, it copies the information into a
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private data structure. When the .reginfo section is read, the
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information is retrieved from the private data structure. When the
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.reginfo section is written, the information in the private data
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structure is updated. The contents of the .reginfo section, as
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seen by programs outside BFD, is a ecoff_reginfo structure. The
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contents of the structure are as seen on the host, so no swapping
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issues arise.
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The assembler used to update the private BFD data structures
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directly. With this approach, it instead just creates a .reginfo
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section and updates that. The real advantage of this approach is
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that objcopy works automatically. */
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#define REGINFO ".reginfo"
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struct ecoff_reginfo
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{
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bfd_vma gp_value; /* GP register value. */
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unsigned long gprmask; /* General registers used. */
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unsigned long cprmask[4]; /* Coprocessor registers used. */
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unsigned long fprmask; /* Floating pointer registers used. */
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};
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/* If the extern bit in a reloc is 1, then r_symndx is an index into
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the external symbol table. If the extern bit is 0, then r_symndx
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indicates a section, and is one of the following values. */
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@ -193,8 +237,8 @@ union aux_ext {
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#define AUX_PUT_ANY(bigend, val, ax, field) \
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((bigend) \
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? (bfd_putb32 ((val), (ax)->field), 0) \
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: (bfd_putl32 ((val), (ax)->field), 0))
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? (bfd_putb32 ((bfd_vma) (val), (ax)->field), 0) \
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: (bfd_putl32 ((bfd_vma) (val), (ax)->field), 0))
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#define AUX_PUT_DNLOW(bigend, val, ax) \
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AUX_PUT_ANY ((bigend), (val), (ax), a_dnLow)
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@ -219,4 +263,91 @@ extern void ecoff_swap_rndx_in PARAMS ((int bigend, struct rndx_ext *,
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extern void ecoff_swap_rndx_out PARAMS ((int bigend, RNDXR *,
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struct rndx_ext *));
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/********************** SWAPPING **********************/
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/* The generic ECOFF code needs to be able to swap debugging
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information in and out in the specific format used by a particular
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ECOFF implementation. This structure provides the information
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needed to do this. */
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struct ecoff_debug_swap
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{
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/* Symbol table magic number. */
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int sym_magic;
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/* Alignment of debugging information. E.g., 4. */
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bfd_size_type debug_align;
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/* Sizes of external symbolic information. */
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bfd_size_type external_hdr_size;
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bfd_size_type external_dnr_size;
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bfd_size_type external_pdr_size;
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bfd_size_type external_sym_size;
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bfd_size_type external_opt_size;
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bfd_size_type external_fdr_size;
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bfd_size_type external_rfd_size;
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bfd_size_type external_ext_size;
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/* Functions to swap in external symbolic data. */
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void (*swap_hdr_in) PARAMS ((bfd *, PTR, HDRR *));
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void (*swap_dnr_in) PARAMS ((bfd *, PTR, DNR *));
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void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *));
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void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *));
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void (*swap_opt_in) PARAMS ((bfd *, PTR, OPTR *));
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void (*swap_fdr_in) PARAMS ((bfd *, PTR, FDR *));
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void (*swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *));
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void (*swap_ext_in) PARAMS ((bfd *, PTR, EXTR *));
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/* Functions to swap out external symbolic data. */
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void (*swap_hdr_out) PARAMS ((bfd *, const HDRR *, PTR));
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void (*swap_dnr_out) PARAMS ((bfd *, const DNR *, PTR));
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void (*swap_pdr_out) PARAMS ((bfd *, const PDR *, PTR));
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void (*swap_sym_out) PARAMS ((bfd *, const SYMR *, PTR));
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void (*swap_opt_out) PARAMS ((bfd *, const OPTR *, PTR));
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void (*swap_fdr_out) PARAMS ((bfd *, const FDR *, PTR));
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void (*swap_rfd_out) PARAMS ((bfd *, const RFDT *, PTR));
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void (*swap_ext_out) PARAMS ((bfd *, const EXTR *, PTR));
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/* As noted above, it so happens that the auxiliary type information
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has the same type and format for all known ECOFF targets. I don't
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see any reason that that should change, so at least for now the
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auxiliary swapping information is not in this table. */
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};
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/********************** SYMBOLS **********************/
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/* For efficiency, gdb deals directly with the unswapped symbolic
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information (that way it only takes the time to swap information
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that it really needs to read). gdb originally retrieved the
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information directly from the BFD backend information, but that
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strategy, besides being sort of ugly, does not work for MIPS ELF,
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which also uses ECOFF debugging information. This structure holds
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pointers to the (mostly) unswapped symbolic information. */
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struct ecoff_debug_info
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{
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/* The swapped ECOFF symbolic header. */
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HDRR symbolic_header;
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/* Pointers to the unswapped symbolic information. Note that the
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pointers to external structures point to different sorts of
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information on different ECOFF targets. The ecoff_debug_swap
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structure provides the sizes of the structures and the functions
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needed to swap the information in and out. These pointers are
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all pointers to arrays, not single structures. They will be NULL
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if there are no instances of the relevant structure. */
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unsigned char *line;
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PTR external_dnr; /* struct dnr_ext */
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PTR external_pdr; /* struct pdr_ext */
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PTR external_sym; /* struct sym_ext */
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PTR external_opt; /* struct opt_ext */
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union aux_ext *external_aux;
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char *ss;
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char *ssext;
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PTR external_fdr; /* struct fdr_ext */
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PTR external_rfd; /* struct rfd_ext */
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PTR external_ext; /* struct ext_ext */
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/* The swapped FDR information. Currently this is never NULL, but
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code using this structure should probably double-check in case
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this changes in the future. This is a pointer to an array, not a
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single structure. */
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FDR *fdr;
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};
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#endif /* ! defined (ECOFF_H) */
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