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* mips.h (MIPS_R_SWITCH): Define.

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Ian Lance Taylor 1994-04-07 18:20:04 +00:00
parent 99a6c7613c
commit f268681bc0
2 changed files with 253 additions and 91 deletions
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4
include/coff/ChangeLog
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@ -1,3 +1,7 @@
Thu Apr 7 14:19:35 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
* mips.h (MIPS_R_SWITCH): Define.
Thu Mar 31 19:28:33 1994 Ken Raeburn (raeburn@cujo.cygnus.com)
* internal.h (internal_aouthdr): Added comments for Apollo fields.

340
include/coff/mips.h
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@ -1,6 +1,5 @@
/* Rudimentary ECOFF support on MIPS machines.
This lacks symbol information, normally provided on MIPS Unix systems
in the files <sym.h> and <symconst.h>. */
/* ECOFF support on MIPS machines.
coff/ecoff.h must be included before this file. */
/********************** FILE HEADER **********************/
@ -14,18 +13,14 @@ struct external_filehdr {
unsigned char f_flags[2]; /* flags */
};
/* 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
#define ECOFFBADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
((x).f_magic!=MIPS_MAGIC_LITTLE) &&\
((x).f_magic!=MIPS_MAGIC_BIG))
/* Magic numbers are defined in coff/ecoff.h. */
#define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
((x).f_magic!=MIPS_MAGIC_LITTLE) &&\
((x).f_magic!=MIPS_MAGIC_BIG) && \
((x).f_magic!=MIPS_MAGIC_LITTLE2) && \
((x).f_magic!=MIPS_MAGIC_BIG2) && \
((x).f_magic!=MIPS_MAGIC_LITTLE3) && \
((x).f_magic!=MIPS_MAGIC_BIG3))
#define FILHDR struct external_filehdr
#define FILHSZ 20
@ -53,9 +48,6 @@ typedef struct external_aouthdr
#define AOUTSZ (sizeof(AOUTHDR))
#define OMAGIC 0407 /* not demand paged (ld -N). */
#define ZMAGIC 0413 /* demand load format, eg normal ld output */
/********************** SECTION HEADER **********************/
struct external_scnhdr {
@ -74,35 +66,6 @@ struct external_scnhdr {
#define SCNHDR struct external_scnhdr
#define SCNHSZ sizeof(SCNHDR)
/*
* names of "special" sections
*/
#define _TEXT ".text"
#define _DATA ".data"
#define _BSS ".bss"
#define _RDATA ".rdata"
#define _SDATA ".sdata"
#define _SBSS ".sbss"
#define _LIT4 ".lit4"
#define _LIT8 ".lit8"
#define _LIB ".lib"
#define DEFAULT_DATA_SECTION_ALIGNMENT 4
#define DEFAULT_BSS_SECTION_ALIGNMENT 4
#define DEFAULT_TEXT_SECTION_ALIGNMENT 16
/* For new sections we havn't heard of before */
#define DEFAULT_SECTION_ALIGNMENT 4
/* MIPS ECOFF uses some additional section types. */
#define STYP_RDATA 0x100
#define STYP_SDATA 0x200
#define STYP_SBSS 0x400
#define STYP_LIT8 0x8000000
#define STYP_LIT4 0x10000000
/* I don't know when this is used. */
#define STYP_OTHER_LOAD 0x80000000
/********************** RELOCATION DIRECTIVES **********************/
struct external_reloc {
@ -133,54 +96,249 @@ struct external_reloc {
#define RELOC_BITS3_EXTERN_BIG 0x01
#define RELOC_BITS3_EXTERN_LITTLE 0x80
/* We store the extern field in the r_offset field of a struct
internal_reloc. FIXME: Do this more sensibly. */
#define r_extern r_offset
/* The r_type field in a reloc is one of the following values. I
don't know if any other values can appear. These seem to be all
that occur in the Ultrix 4.2 libraries. */
#define MIPS_R_IGNORE 0
#define MIPS_R_REFHALF 1
#define MIPS_R_REFWORD 2
#define MIPS_R_JMPADDR 3
#define MIPS_R_REFHI 4
#define MIPS_R_REFLO 5
#define MIPS_R_GPREL 6
#define MIPS_R_LITERAL 7
/* If the extern bit 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_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
/* This reloc type is a Cygnus extension used when generating position
independent code for embedded systems. */
#define MIPS_R_PCREL16 8
/* The r_type field is one of the following values. I don't know if
any other values can appear. These seem to be all that occur in
the Ultrix 4.2 libraries. */
#define ECOFF_R_IGNORE 0
#define ECOFF_R_REFHALF 1
#define ECOFF_R_REFWORD 2
#define ECOFF_R_JMPADDR 3
#define ECOFF_R_REFHI 4
#define ECOFF_R_REFLO 5
#define ECOFF_R_GPREL 6
#define ECOFF_R_LITERAL 7
/* This reloc type is a Cygnus extension used when generating position
independent code for embedded systems. It is used for an entry in
a switch table, which looks like this:
.switch $L3-$LS12
The object file will contain the correct difference, and does not
require adjustment. However, when the linker is relaxing PC
relative calls, it is possible for $L3 to move farther away. This
reloc always appears in the .text section, and is always against
the .text section. However, the symbol index is not
RELOC_SECTION_TEXT. It is, instead, the distance between this
switch table entry and $LS12. Thus, the original value of $L12 is
vaddr - symndx
and the original value of $L3 is
vaddr - symndx + addend
where addend is the value in the object file. Knowing this, the
linker can know whether the addend in the object file must be
adjusted. */
#define MIPS_R_SWITCH 9
/********************** 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 MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK)
#define MIPS_MARK_STAB(code) ((code)+CODE_MASK)
#define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK)
#define STABS_SYMBOL "@stabs"
#define MIPS_IS_STAB ECOFF_IS_STAB
#define MIPS_MARK_STAB ECOFF_MARK_STAB
#define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB
/********************** COFF **********************/
#define DEFAULT_DATA_SECTION_ALIGNMENT 4
#define DEFAULT_BSS_SECTION_ALIGNMENT 4
#define DEFAULT_TEXT_SECTION_ALIGNMENT 16
/* For new sections we havn't heard of before */
#define DEFAULT_SECTION_ALIGNMENT 4
/* 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)
/********************** SYMBOLIC INFORMATION **********************/
/* Written by John Gilmore. */
/* ECOFF uses COFF-like section structures, but its own symbol format.
This file defines the symbol format in fields whose size and alignment
will not vary on different host systems. */
/* File header as a set of bytes */
struct hdr_ext {
unsigned char h_magic[2];
unsigned char h_vstamp[2];
unsigned char h_ilineMax[4];
unsigned char h_cbLine[4];
unsigned char h_cbLineOffset[4];
unsigned char h_idnMax[4];
unsigned char h_cbDnOffset[4];
unsigned char h_ipdMax[4];
unsigned char h_cbPdOffset[4];
unsigned char h_isymMax[4];
unsigned char h_cbSymOffset[4];
unsigned char h_ioptMax[4];
unsigned char h_cbOptOffset[4];
unsigned char h_iauxMax[4];
unsigned char h_cbAuxOffset[4];
unsigned char h_issMax[4];
unsigned char h_cbSsOffset[4];
unsigned char h_issExtMax[4];
unsigned char h_cbSsExtOffset[4];
unsigned char h_ifdMax[4];
unsigned char h_cbFdOffset[4];
unsigned char h_crfd[4];
unsigned char h_cbRfdOffset[4];
unsigned char h_iextMax[4];
unsigned char h_cbExtOffset[4];
};
/* File descriptor external record */
struct fdr_ext {
unsigned char f_adr[4];
unsigned char f_rss[4];
unsigned char f_issBase[4];
unsigned char f_cbSs[4];
unsigned char f_isymBase[4];
unsigned char f_csym[4];
unsigned char f_ilineBase[4];
unsigned char f_cline[4];
unsigned char f_ioptBase[4];
unsigned char f_copt[4];
unsigned char f_ipdFirst[2];
unsigned char f_cpd[2];
unsigned char f_iauxBase[4];
unsigned char f_caux[4];
unsigned char f_rfdBase[4];
unsigned char f_crfd[4];
unsigned char f_bits1[1];
unsigned char f_bits2[3];
unsigned char f_cbLineOffset[4];
unsigned char f_cbLine[4];
};
#define FDR_BITS1_LANG_BIG 0xF8
#define FDR_BITS1_LANG_SH_BIG 3
#define FDR_BITS1_LANG_LITTLE 0x1F
#define FDR_BITS1_LANG_SH_LITTLE 0
#define FDR_BITS1_FMERGE_BIG 0x04
#define FDR_BITS1_FMERGE_LITTLE 0x20
#define FDR_BITS1_FREADIN_BIG 0x02
#define FDR_BITS1_FREADIN_LITTLE 0x40
#define FDR_BITS1_FBIGENDIAN_BIG 0x01
#define FDR_BITS1_FBIGENDIAN_LITTLE 0x80
#define FDR_BITS2_GLEVEL_BIG 0xC0
#define FDR_BITS2_GLEVEL_SH_BIG 6
#define FDR_BITS2_GLEVEL_LITTLE 0x03
#define FDR_BITS2_GLEVEL_SH_LITTLE 0
/* We ignore the `reserved' field in bits2. */
/* Procedure descriptor external record */
struct pdr_ext {
unsigned char p_adr[4];
unsigned char p_isym[4];
unsigned char p_iline[4];
unsigned char p_regmask[4];
unsigned char p_regoffset[4];
unsigned char p_iopt[4];
unsigned char p_fregmask[4];
unsigned char p_fregoffset[4];
unsigned char p_frameoffset[4];
unsigned char p_framereg[2];
unsigned char p_pcreg[2];
unsigned char p_lnLow[4];
unsigned char p_lnHigh[4];
unsigned char p_cbLineOffset[4];
};
/* Line numbers */
struct line_ext {
unsigned char l_line[4];
};
/* Symbol external record */
struct sym_ext {
unsigned char s_iss[4];
unsigned char s_value[4];
unsigned char s_bits1[1];
unsigned char s_bits2[1];
unsigned char s_bits3[1];
unsigned char s_bits4[1];
};
#define SYM_BITS1_ST_BIG 0xFC
#define SYM_BITS1_ST_SH_BIG 2
#define SYM_BITS1_ST_LITTLE 0x3F
#define SYM_BITS1_ST_SH_LITTLE 0
#define SYM_BITS1_SC_BIG 0x03
#define SYM_BITS1_SC_SH_LEFT_BIG 3
#define SYM_BITS1_SC_LITTLE 0xC0
#define SYM_BITS1_SC_SH_LITTLE 6
#define SYM_BITS2_SC_BIG 0xE0
#define SYM_BITS2_SC_SH_BIG 5
#define SYM_BITS2_SC_LITTLE 0x07
#define SYM_BITS2_SC_SH_LEFT_LITTLE 2
#define SYM_BITS2_RESERVED_BIG 0x10
#define SYM_BITS2_RESERVED_LITTLE 0x08
#define SYM_BITS2_INDEX_BIG 0x0F
#define SYM_BITS2_INDEX_SH_LEFT_BIG 16
#define SYM_BITS2_INDEX_LITTLE 0xF0
#define SYM_BITS2_INDEX_SH_LITTLE 4
#define SYM_BITS3_INDEX_SH_LEFT_BIG 8
#define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4
#define SYM_BITS4_INDEX_SH_LEFT_BIG 0
#define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12
/* External symbol external record */
struct ext_ext {
unsigned char es_bits1[1];
unsigned char es_bits2[1];
unsigned char es_ifd[2];
struct sym_ext es_asym;
};
#define EXT_BITS1_JMPTBL_BIG 0x80
#define EXT_BITS1_JMPTBL_LITTLE 0x01
#define EXT_BITS1_COBOL_MAIN_BIG 0x40
#define EXT_BITS1_COBOL_MAIN_LITTLE 0x02
#define EXT_BITS1_WEAKEXT_BIG 0x20
#define EXT_BITS1_WEAKEXT_LITTLE 0x04
/* Dense numbers external record */
struct dnr_ext {
unsigned char d_rfd[4];
unsigned char d_index[4];
};
/* Relative file descriptor */
struct rfd_ext {
unsigned char rfd[4];
};
/* Optimizer symbol external record */
struct opt_ext {
unsigned char o_bits1[1];
unsigned char o_bits2[1];
unsigned char o_bits3[1];
unsigned char o_bits4[1];
struct rndx_ext o_rndx;
unsigned char o_offset[4];
};
#define OPT_BITS2_VALUE_SH_LEFT_BIG 16
#define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0
#define OPT_BITS3_VALUE_SH_LEFT_BIG 8
#define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8
#define OPT_BITS4_VALUE_SH_LEFT_BIG 0
#define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16