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Diffstat (limited to 'gnu/usr.bin/gdb/gdb/coff/ecoff.h')
| -rw-r--r-- | gnu/usr.bin/gdb/gdb/coff/ecoff.h | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/gnu/usr.bin/gdb/gdb/coff/ecoff.h b/gnu/usr.bin/gdb/gdb/coff/ecoff.h new file mode 100644 index 000000000000..8c7cee243ea9 --- /dev/null +++ b/gnu/usr.bin/gdb/gdb/coff/ecoff.h @@ -0,0 +1,262 @@ +#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 _LIT4 ".lit4" +#define _LIT8 ".lit8" +#define _LIB ".lib" +#define _INIT ".init" +#define _FINI ".fini" + +/* 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_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 *)); + +#endif /* ! defined (ECOFF_H) */ |