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57115f09a8
* ecoff-ext.h: Added prototypes for ECOFF swapping functions. * internal.h (internal_scnhdr): Always provide s_align field, not just on i960. (internal_reloc): Always provide r_size field, not just on RS/6000. * mips.h (_RDATA, _SDATA, _SBSS, _LIT4, _LIT8, STYP_RDATA, STYP_SDATA, STYP_SBSS, STYP_LIT4, STYP_LIT8): Defined. (CODE_MASK, MIPS_IS_STAB, MIPS_MARK_STAB, MIPS_UNMARK_STAB, STABS_SYMBOL): Moved in from gdb/mipsread.c.
122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/* Rudimentary ECOFF support on MIPS machines.
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This lacks symbol information, normally provided on MIPS Unix systems
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in the files <sym.h> and <symconst.h>. */
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/********************** FILE HEADER **********************/
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struct external_filehdr {
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unsigned char f_magic[2]; /* magic number */
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unsigned char f_nscns[2]; /* number of sections */
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unsigned char f_timdat[4]; /* time & date stamp */
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unsigned char f_symptr[4]; /* file pointer to symtab */
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unsigned char f_nsyms[4]; /* number of symtab entries */
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unsigned char f_opthdr[2]; /* sizeof(optional hdr) */
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unsigned char f_flags[2]; /* flags */
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};
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/* Mips magics */
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#define MIPS_MAGIC_1 0x0180
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#define MIPS_MAGIC_2 0x0162
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#define MIPS_MAGIC_3 0x0160
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#define ECOFFBADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
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((x).f_magic!=MIPS_MAGIC_2) &&\
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((x).f_magic!=MIPS_MAGIC_3))
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#define FILHDR struct external_filehdr
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#define FILHSZ 20
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/********************** AOUT "OPTIONAL HEADER" **********************/
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typedef struct external_aouthdr
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{
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unsigned char magic[2]; /* type of file */
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unsigned char vstamp[2]; /* version stamp */
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unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/
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unsigned char dsize[4]; /* initialized data " " */
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unsigned char bsize[4]; /* uninitialized data " " */
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unsigned char entry[4]; /* entry pt. */
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unsigned char text_start[4]; /* base of text used for this file */
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unsigned char data_start[4]; /* base of data used for this file */
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} AOUTHDR;
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/* compute size of a header */
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#define AOUTSZ (sizeof(AOUTHDR))
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/********************** SECTION HEADER **********************/
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struct external_scnhdr {
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unsigned char s_name[8]; /* section name */
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unsigned char s_paddr[4]; /* physical address, aliased s_nlib */
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unsigned char s_vaddr[4]; /* virtual address */
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unsigned char s_size[4]; /* section size */
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unsigned char s_scnptr[4]; /* file ptr to raw data for section */
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unsigned char s_relptr[4]; /* file ptr to relocation */
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unsigned char s_lnnoptr[4]; /* file ptr to line numbers */
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unsigned char s_nreloc[2]; /* number of relocation entries */
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unsigned char s_nlnno[2]; /* number of line number entries*/
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unsigned char s_flags[4]; /* flags */
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};
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#define SCNHDR struct external_scnhdr
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#define SCNHSZ sizeof(SCNHDR)
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/*
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* names of "special" sections
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*/
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#define _TEXT ".text"
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#define _DATA ".data"
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#define _BSS ".bss"
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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 _LIT4 ".lit4"
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#define _LIT8 ".lit8"
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#define DEFAULT_DATA_SECTION_ALIGNMENT 4
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#define DEFAULT_BSS_SECTION_ALIGNMENT 4
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#define DEFAULT_TEXT_SECTION_ALIGNMENT 16
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/* For new sections we havn't heard of before */
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#define DEFAULT_SECTION_ALIGNMENT 4
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/* MIPS ECOFF uses some additional section types. */
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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_LIT8 0x8000000
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#define STYP_LIT4 0x10000000
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/* I don't know when this is used. */
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#define STYP_OTHER_LOAD 0x80000000
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/********************** RELOCATION DIRECTIVES **********************/
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struct external_reloc {
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unsigned char r_vaddr[4];
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unsigned char r_symndx[4];
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unsigned char r_type[2];
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unsigned char pad[2];
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};
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/* Relevent values for r_type and ecoff. Would someone please document them */
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#define RELOC struct external_reloc
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#define RELSZ 12
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/* gcc uses mips-tfile to output type information in special stabs
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entries. These must match the corresponding definition in
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gcc/config/mips.h. At some point, these should probably go into a
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shared include file, but currently gcc and gdb do not share any
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directories. */
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#define CODE_MASK 0x8F300
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#define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK)
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#define MIPS_MARK_STAB(code) ((code)+CODE_MASK)
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#define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK)
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#define STABS_SYMBOL "@stabs"
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