forked from KolibriOS/kolibrios
345 lines
9.3 KiB
C
345 lines
9.3 KiB
C
/* ECOFF support on MIPS machines.
|
|
coff/ecoff.h must be included before this file.
|
|
|
|
Copyright 1999, 2004, 2010 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. */
|
|
|
|
#define DO_NOT_DEFINE_AOUTHDR
|
|
#define L_LNNO_SIZE 4
|
|
#include "coff/external.h"
|
|
|
|
/* 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))
|
|
|
|
|
|
/********************** AOUT "OPTIONAL HEADER" **********************/
|
|
|
|
typedef struct external_aouthdr
|
|
{
|
|
unsigned char magic[2]; /* type of file */
|
|
unsigned char vstamp[2]; /* version stamp */
|
|
unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/
|
|
unsigned char dsize[4]; /* initialized data " " */
|
|
unsigned char bsize[4]; /* uninitialized data " " */
|
|
unsigned char entry[4]; /* entry pt. */
|
|
unsigned char text_start[4]; /* base of text used for this file */
|
|
unsigned char data_start[4]; /* base of data used for this file */
|
|
unsigned char bss_start[4]; /* base of bss used for this file */
|
|
unsigned char gprmask[4]; /* ?? */
|
|
unsigned char cprmask[4][4]; /* ?? */
|
|
unsigned char gp_value[4]; /* value for gp register */
|
|
} AOUTHDR;
|
|
|
|
/* compute size of a header */
|
|
|
|
#define AOUTSZ 56
|
|
#define AOUTHDRSZ 56
|
|
|
|
/********************** RELOCATION DIRECTIVES **********************/
|
|
|
|
struct external_reloc
|
|
{
|
|
unsigned char r_vaddr[4];
|
|
unsigned char r_bits[4];
|
|
};
|
|
|
|
#define RELOC struct external_reloc
|
|
#define RELSZ 8
|
|
|
|
/* MIPS ECOFF uses a packed 8 byte format for relocs. These constants
|
|
are used to unpack the r_bits field. */
|
|
|
|
#define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16
|
|
#define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0
|
|
|
|
#define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8
|
|
#define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8
|
|
|
|
#define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0
|
|
#define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16
|
|
|
|
/* Originally, ECOFF used four bits for the reloc type and had three
|
|
reserved bits. Irix 4 added another bit for the reloc type, which
|
|
was easy because it was big endian and one of the spare bits became
|
|
the new most significant bit. To make this also work for little
|
|
endian ECOFF, we need to wrap one of the reserved bits around to
|
|
become the most significant bit of the reloc type. */
|
|
#define RELOC_BITS3_TYPE_BIG 0x3E
|
|
#define RELOC_BITS3_TYPE_SH_BIG 1
|
|
#define RELOC_BITS3_TYPE_LITTLE 0x78
|
|
#define RELOC_BITS3_TYPE_SH_LITTLE 3
|
|
#define RELOC_BITS3_TYPEHI_LITTLE 0x04
|
|
#define RELOC_BITS3_TYPEHI_SH_LITTLE 2
|
|
|
|
#define RELOC_BITS3_EXTERN_BIG 0x01
|
|
#define RELOC_BITS3_EXTERN_LITTLE 0x80
|
|
|
|
/* 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
|
|
|
|
/* FIXME: This relocation is used (internally only) to represent branches
|
|
when assembling. It should never appear in output files, and
|
|
be removed. (It used to be used for embedded-PIC support.) */
|
|
#define MIPS_R_PCREL16 12
|
|
|
|
/********************** STABS **********************/
|
|
|
|
#define MIPS_IS_STAB ECOFF_IS_STAB
|
|
#define MIPS_MARK_STAB ECOFF_MARK_STAB
|
|
#define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB
|
|
|
|
/********************** 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];
|
|
};
|
|
|
|
/* Runtime procedure table */
|
|
|
|
struct rpdr_ext
|
|
{
|
|
unsigned char p_adr[4];
|
|
unsigned char p_regmask[4];
|
|
unsigned char p_regoffset[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_irpss[4];
|
|
unsigned char p_reserved[4];
|
|
unsigned char p_exception_info[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
|