mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-23 17:23:29 +08:00
294eaca479
Thu Oct 8 08:52:48 1992 Steve Chamberlain (sac@thepub.cygnus.com) Now a bfd knows whether underscores are normally prepended to symbols in its file format. Helps with error messages. * aout-adobe.c, aout-target.h, bout.c, coff-a29k.c, coff-h8300.c, coff-z8k.c: targets set so they have leading underscore * coff-i386.c, coff-i960.c, coff-m68k.c, coff-mips.c, coff-m88k.c, coff-rs6000.c, coff-we32k.c, elf.c, ieee.c, srec.c: targets set without leading underscore flag * targets.c: add symbol leading char to xvec description * bfd-in.h (bfd_get_symbol_leading_char): new macro.
340 lines
10 KiB
C
340 lines
10 KiB
C
/* AMD 29000 COFF back-end for BFD.
|
|
Copyright (C) 1990-1991 Free Software Foundation, Inc.
|
|
Contributed by David Wood at New York University 7/8/91.
|
|
|
|
This file is part of BFD, the Binary File Descriptor library.
|
|
|
|
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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#define A29K 1
|
|
|
|
#include "bfd.h"
|
|
#include "sysdep.h"
|
|
#include "libbfd.h"
|
|
#include "obstack.h"
|
|
#include "coff/a29k.h"
|
|
#include "coff/internal.h"
|
|
#include "libcoff.h"
|
|
|
|
#define INSERT_HWORD(WORD,HWORD) \
|
|
(((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
|
|
#define EXTRACT_HWORD(WORD) \
|
|
(((WORD) & 0x00ff0000) >> 8) | ((WORD)& 0xff)
|
|
#define SIGN_EXTEND_HWORD(HWORD) \
|
|
((HWORD) & 0x8000 ? (HWORD)|0xffff0000 : (HWORD))
|
|
|
|
/* Provided the symbol, returns the value reffed */
|
|
static long
|
|
get_symbol_value(symbol)
|
|
asymbol *symbol;
|
|
{
|
|
long relocation = 0;
|
|
|
|
if (symbol->section == &bfd_com_section)
|
|
{
|
|
relocation = 0;
|
|
}
|
|
else
|
|
{
|
|
relocation = symbol->value +
|
|
symbol->section->output_section->vma +
|
|
symbol->section->output_offset;
|
|
}
|
|
|
|
return(relocation);
|
|
}
|
|
|
|
/* this function is in charge of performing all the 29k relocations */
|
|
|
|
static bfd_reloc_status_type
|
|
DEFUN(a29k_reloc,(abfd, reloc_entry, symbol_in, data, input_section, output_bfd),
|
|
bfd *abfd AND
|
|
arelent *reloc_entry AND
|
|
asymbol *symbol_in AND
|
|
PTR data AND
|
|
asection *input_section AND
|
|
bfd *output_bfd)
|
|
{
|
|
/* the consth relocation comes in two parts, we have to remember
|
|
the state between calls, in these variables */
|
|
static boolean part1_consth_active = false;
|
|
static unsigned long part1_consth_value;
|
|
|
|
unsigned long insn;
|
|
unsigned long sym_value;
|
|
unsigned long unsigned_value;
|
|
unsigned short r_type;
|
|
long signed_value;
|
|
|
|
unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
|
|
bfd_byte *hit_data =addr + (bfd_byte *)(data);
|
|
|
|
r_type = reloc_entry->howto->type;
|
|
|
|
if (output_bfd) {
|
|
/* Partial linking - do nothing */
|
|
reloc_entry->address += input_section->output_offset;
|
|
return bfd_reloc_ok;
|
|
|
|
}
|
|
|
|
if (symbol_in && (symbol_in->section == &bfd_und_section))
|
|
{
|
|
/* Keep the state machine happy in case we're called again */
|
|
if (r_type == R_IHIHALF)
|
|
{
|
|
part1_consth_active = true;
|
|
part1_consth_value = 0;
|
|
}
|
|
return(bfd_reloc_undefined);
|
|
}
|
|
|
|
if ((part1_consth_active) && (r_type != R_IHCONST))
|
|
{
|
|
fprintf(stderr,"Relocation problem : ");
|
|
fprintf(stderr,"Missing IHCONST in module %s\n",abfd->filename);
|
|
part1_consth_active = false;
|
|
return(bfd_reloc_dangerous);
|
|
}
|
|
|
|
|
|
sym_value = get_symbol_value(symbol_in);
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_IREL:
|
|
insn = bfd_get_32(abfd, hit_data);
|
|
/* Take the value in the field and sign extend it */
|
|
signed_value = EXTRACT_HWORD(insn) << 2;
|
|
signed_value = SIGN_EXTEND_HWORD(signed_value);
|
|
signed_value += sym_value + reloc_entry->addend;
|
|
if ((signed_value&~0x3ffff) == 0)
|
|
{ /* Absolute jmp/call */
|
|
insn |= (1<<24); /* Make it absolute */
|
|
/* FIXME: Should we change r_type to R_IABS */
|
|
}
|
|
else
|
|
{
|
|
/* Relative jmp/call, so subtract from the value the
|
|
address of the place we're coming from */
|
|
signed_value -= reloc_entry->address +
|
|
input_section->output_section->vma +
|
|
input_section->output_offset;
|
|
if (signed_value>0x1ffff || signed_value<-0x20000)
|
|
return(bfd_reloc_outofrange);
|
|
}
|
|
signed_value >>= 2;
|
|
insn = INSERT_HWORD(insn, signed_value);
|
|
bfd_put_32(abfd, insn ,hit_data);
|
|
break;
|
|
case R_ILOHALF:
|
|
insn = bfd_get_32(abfd, hit_data);
|
|
unsigned_value = EXTRACT_HWORD(insn);
|
|
unsigned_value += sym_value + reloc_entry->addend;
|
|
insn = INSERT_HWORD(insn, unsigned_value);
|
|
bfd_put_32(abfd, insn, hit_data);
|
|
break;
|
|
case R_IHIHALF:
|
|
insn = bfd_get_32(abfd, hit_data);
|
|
/* consth, part 1
|
|
Just get the symbol value that is referenced */
|
|
part1_consth_active = true;
|
|
part1_consth_value = sym_value + reloc_entry->addend;
|
|
/* Don't modify insn until R_IHCONST */
|
|
break;
|
|
case R_IHCONST:
|
|
insn = bfd_get_32(abfd, hit_data);
|
|
/* consth, part 2
|
|
Now relocate the reference */
|
|
if (part1_consth_active == false) {
|
|
fprintf(stderr,"Relocation problem : ");
|
|
fprintf(stderr,"IHIHALF missing in module %s\n",
|
|
abfd->filename);
|
|
return(bfd_reloc_dangerous);
|
|
}
|
|
/* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
|
|
unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/
|
|
unsigned_value += reloc_entry->addend; /* r_symndx */
|
|
unsigned_value += part1_consth_value;
|
|
unsigned_value = unsigned_value >> 16;
|
|
insn = INSERT_HWORD(insn, unsigned_value);
|
|
part1_consth_active = false;
|
|
bfd_put_32(abfd, insn, hit_data);
|
|
break;
|
|
case R_BYTE:
|
|
insn = bfd_get_8(abfd, hit_data);
|
|
unsigned_value = insn + sym_value + reloc_entry->addend;
|
|
if (unsigned_value & 0xffffff00) {
|
|
fprintf(stderr,"Relocation problem : ");
|
|
fprintf(stderr,"byte value too large in module %s\n",
|
|
abfd->filename);
|
|
return(bfd_reloc_overflow);
|
|
}
|
|
bfd_put_8(abfd, unsigned_value, hit_data);
|
|
break;
|
|
case R_HWORD:
|
|
insn = bfd_get_16(abfd, hit_data);
|
|
unsigned_value = insn + sym_value + reloc_entry->addend;
|
|
if (unsigned_value & 0xffff0000) {
|
|
fprintf(stderr,"Relocation problem : ");
|
|
fprintf(stderr,"hword value too large in module %s\n",
|
|
abfd->filename);
|
|
return(bfd_reloc_overflow);
|
|
}
|
|
|
|
bfd_put_16(abfd, insn, hit_data);
|
|
break;
|
|
case R_WORD:
|
|
insn = bfd_get_32(abfd, hit_data);
|
|
insn += sym_value + reloc_entry->addend;
|
|
bfd_put_32(abfd, insn, hit_data);
|
|
break;
|
|
default:
|
|
fprintf(stderr,"Relocation problem : ");
|
|
fprintf(stderr,"Unrecognized reloc type %d, in module %s\n",
|
|
r_type,abfd->filename);
|
|
return (bfd_reloc_dangerous);
|
|
}
|
|
|
|
|
|
return(bfd_reloc_ok);
|
|
}
|
|
|
|
/* type rightshift
|
|
size
|
|
bitsize
|
|
pc-relative
|
|
bitpos
|
|
absolute
|
|
complain_on_overflow
|
|
special_function
|
|
relocation name
|
|
partial_inplace
|
|
src_mask
|
|
*/
|
|
|
|
/*FIXME: I'm not real sure about this table */
|
|
#define NA 0 /* Obsolete fields, via the documentation */
|
|
#define NAB false
|
|
static reloc_howto_type howto_table[] =
|
|
{
|
|
{R_ABS, 0, 3, NA, false, NA, NAB, true,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false},
|
|
{1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10},
|
|
{11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
|
|
{21}, {22}, {23},
|
|
{R_IREL, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false},
|
|
{R_IABS, 0, 3, NA, false, NA, NAB, true,a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false},
|
|
{R_ILOHALF, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
|
|
{R_IHIHALF, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
|
|
{R_IHCONST, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
|
|
{R_BYTE, 0, 0, NA, false, NA, NAB, true,a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false},
|
|
{R_HWORD, 0, 1, NA, false, NA, NAB, true,a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false},
|
|
{R_WORD, 0, 2, NA, false, NA, NAB, true,a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false},
|
|
};
|
|
#undef NA
|
|
|
|
#define BADMAG(x) A29KBADMAG(x)
|
|
|
|
#define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
|
|
reloc_processing(relent, reloc, symbols, abfd, section)
|
|
|
|
static void DEFUN(reloc_processing,(relent,reloc, symbols, abfd, section) ,
|
|
arelent *relent AND
|
|
struct internal_reloc *reloc AND
|
|
asymbol **symbols AND
|
|
bfd *abfd AND
|
|
asection *section)
|
|
{
|
|
relent->address = reloc->r_vaddr;
|
|
relent->howto = howto_table + reloc->r_type;
|
|
if (reloc->r_type == R_IHCONST)
|
|
{
|
|
relent->addend = reloc->r_symndx;
|
|
relent->sym_ptr_ptr= bfd_abs_section.symbol_ptr_ptr;
|
|
}
|
|
else
|
|
{
|
|
asymbol *ptr;
|
|
relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
|
|
|
|
ptr = *(relent->sym_ptr_ptr);
|
|
|
|
if (ptr
|
|
&& ptr->the_bfd == abfd
|
|
|
|
&& ((ptr->flags & BSF_OLD_COMMON)== 0))
|
|
{
|
|
relent->addend = 0;
|
|
}
|
|
else
|
|
{
|
|
relent->addend = 0;
|
|
}
|
|
relent->address-= section->vma;
|
|
}
|
|
}
|
|
|
|
#include "coffcode.h"
|
|
|
|
bfd_target a29kcoff_big_vec =
|
|
{
|
|
"coff-a29k-big", /* name */
|
|
bfd_target_coff_flavour,
|
|
true, /* data byte order is big */
|
|
true, /* header byte order is big */
|
|
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
|
HAS_LINENO | HAS_DEBUG |
|
|
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
|
|
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
|
|
| SEC_LOAD | SEC_RELOC
|
|
| SEC_READONLY ),
|
|
'_', /* leading underscore */
|
|
'/', /* ar_pad_char */
|
|
15, /* ar_max_namelen */
|
|
2, /* minimum section alignment */
|
|
/* data */
|
|
_do_getb64, _do_putb64, _do_getb32,
|
|
_do_putb32, _do_getb16, _do_putb16,
|
|
/* hdrs */
|
|
_do_getb64, _do_putb64, _do_getb32,
|
|
_do_putb32, _do_getb16, _do_putb16,
|
|
|
|
{
|
|
|
|
_bfd_dummy_target,
|
|
coff_object_p,
|
|
bfd_generic_archive_p,
|
|
_bfd_dummy_target
|
|
},
|
|
{
|
|
bfd_false,
|
|
coff_mkobject,
|
|
_bfd_generic_mkarchive,
|
|
bfd_false
|
|
},
|
|
{
|
|
bfd_false,
|
|
coff_write_object_contents,
|
|
_bfd_write_archive_contents,
|
|
bfd_false
|
|
},
|
|
|
|
JUMP_TABLE(coff),
|
|
COFF_SWAP_TABLE
|
|
};
|
|
|