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binutils-gdb/bfd/evax-egsd.c

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/* evax-egsd.c -- BFD back-end for ALPHA EVAX (openVMS/Alpha) files.
Copyright 1996, 1997 Free Software Foundation Inc.
go and read the openVMS linker manual (esp. appendix B)
if you don't know what's going on here :-)
Written by Klaus K"ampf (kkaempf@progis.de)
of proGIS Softwareentwicklung, Aachen, Germany
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <ctype.h>
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "evax.h"
/*-----------------------------------------------------------------------------*/
/* sections every evax object file has */
#define EVAX_ABS_NAME "$ABS$"
#define EVAX_CODE_NAME "$CODE$"
#define EVAX_LINK_NAME "$LINK$"
#define EVAX_DATA_NAME "$DATA$"
#define EVAX_BSS_NAME "$BSS$"
#define EVAX_READONLY_NAME "$READONLY$"
#define EVAX_LITERAL_NAME "$LITERAL$"
#define EVAX_COMMON_NAME "$COMMON$"
#define EVAX_LOCAL_NAME "$LOCAL$"
struct sec_flags_struct {
char *name; /* name of section */
int eflags_always;
flagword flags_always; /* flags we set always */
int eflags_hassize;
flagword flags_hassize; /* flags we set if the section has a size > 0 */
};
/* just a dummy flag array since i don't understand it yet */
static struct sec_flags_struct evax_section_flags[] = {
{ EVAX_ABS_NAME,
(EGPS_S_V_SHR),
(SEC_DATA),
(EGPS_S_V_SHR),
(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
{ EVAX_CODE_NAME,
(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
(SEC_CODE),
(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
(SEC_IN_MEMORY|SEC_CODE|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
{ EVAX_LINK_NAME,
(EGPS_S_V_REL|EGPS_S_V_RD),
(SEC_DATA|SEC_READONLY),
(EGPS_S_V_REL|EGPS_S_V_RD),
(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
{ EVAX_DATA_NAME,
(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
(SEC_DATA),
(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
{ EVAX_BSS_NAME,
(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
(SEC_NO_FLAGS),
(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
(SEC_IN_MEMORY|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
{ EVAX_READONLY_NAME,
(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
(SEC_DATA|SEC_READONLY),
(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
{ EVAX_LITERAL_NAME,
(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
(SEC_DATA|SEC_READONLY),
(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
{ NULL,
(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
(SEC_DATA),
(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) }
};
/* Retrieve bfd section flags by name and size */
static flagword
evax_secflag_by_name(name, size)
char *name;
int size;
{
int i = 0;
while (evax_section_flags[i].name != NULL)
{
if (strcmp (name, evax_section_flags[i].name) == 0)
{
if (size > 0)
return evax_section_flags[i].flags_hassize;
else
return evax_section_flags[i].flags_always;
}
i++;
}
if (size > 0)
return evax_section_flags[i].flags_hassize;
return evax_section_flags[i].flags_always;
}
/* Retrieve evax section flags by name and size */
static flagword
evax_esecflag_by_name(name, size)
char *name;
int size;
{
int i = 0;
while (evax_section_flags[i].name != NULL)
{
if (strcmp (name, evax_section_flags[i].name) == 0)
{
if (size > 0)
return evax_section_flags[i].eflags_hassize;
else
return evax_section_flags[i].eflags_always;
}
i++;
}
if (size > 0)
return evax_section_flags[i].eflags_hassize;
return evax_section_flags[i].eflags_always;
}
/*-----------------------------------------------------------------------------*/
#if EVAX_DEBUG
/* debug */
struct flagdescstruct { char *name; flagword value; };
/* Convert flag to printable string */
static char *
flag2str(flagdesc, flags)
struct flagdescstruct *flagdesc;
flagword flags;
{
static char res[64];
int next = 0;
res[0] = 0;
while (flagdesc->name != NULL)
{
if ((flags & flagdesc->value) != 0)
{
if (next)
strcat(res, ",");
else
next = 1;
strcat (res, flagdesc->name);
}
flagdesc++;
}
return res;
}
#endif
/*-----------------------------------------------------------------------------*/
/* input routines */
/* Process EGSD record
return 0 on success, -1 on error */
int
_bfd_evax_slurp_egsd (abfd)
bfd *abfd;
{
#if EVAX_DEBUG
static struct flagdescstruct gpsflagdesc[] =
{
{ "PIC", 0x0001 },
{ "LIB", 0x0002 },
{ "OVR", 0x0004 },
{ "REL", 0x0008 },
{ "GBL", 0x0010 },
{ "SHR", 0x0020 },
{ "EXE", 0x0040 },
{ "RD", 0x0080 },
{ "WRT", 0x0100 },
{ "VEC", 0x0200 },
{ "NOMOD", 0x0400 },
{ "COM", 0x0800 },
{ NULL, 0 }
};
static struct flagdescstruct gsyflagdesc[] =
{
{ "WEAK", 0x0001 },
{ "DEF", 0x0002 },
{ "UNI", 0x0004 },
{ "REL", 0x0008 },
{ "COMM", 0x0010 },
{ "VECEP", 0x0020 },
{ "NORM", 0x0040 },
{ NULL, 0 }
};
#endif
int gsd_type, gsd_size;
asection *section;
unsigned char *evax_rec;
flagword new_flags, old_flags;
char *name;
asymbol *symbol;
evax_symbol_entry *entry;
unsigned long base_addr;
unsigned long align_addr;
#if EVAX_DEBUG
evax_debug (2, "EGSD\n");
#endif
PRIV(evax_rec) += 8; /* skip type, size, l_temp */
PRIV(rec_size) -= 8;
/* calculate base address for each section */
base_addr = 0L;
abfd->symcount = 0;
while (PRIV(rec_size) > 0)
{
evax_rec = PRIV(evax_rec);
_bfd_evax_get_header_values (abfd, evax_rec, &gsd_type, &gsd_size);
switch (gsd_type)
{
case EGSD_S_C_PSC:
{
/* program section definition */
name = _bfd_evax_save_counted_string ((char *)evax_rec+12);
section = bfd_make_section (abfd, name);
if (!section)
return -1;
old_flags = bfd_getl16 (evax_rec + 6);
section->_raw_size = bfd_getl32 (evax_rec + 8); /* allocation */
new_flags = evax_secflag_by_name (name, (int) section->_raw_size);
if (old_flags & EGPS_S_V_REL)
new_flags |= SEC_RELOC;
if (!bfd_set_section_flags (abfd, section, new_flags))
return -1;
section->alignment_power = evax_rec[4];
align_addr = (1 << section->alignment_power);
if ((base_addr % align_addr) != 0)
base_addr += (align_addr - (base_addr % align_addr));
section->vma = (bfd_vma)base_addr;
base_addr += section->_raw_size;
section->contents = ((unsigned char *)
bfd_malloc (section->_raw_size));
if (section->contents == NULL)
return -1;
memset (section->contents, 0, (size_t) section->_raw_size);
section->_cooked_size = section->_raw_size;
#if EVAX_DEBUG
evax_debug(3, "egsd psc %d (%s, flags %04x=%s) ",
section->index, name, old_flags, flag2str(gpsflagdesc, old_flags));
evax_debug(3, "%d bytes at 0x%08lx (mem %p)\n",
section->_raw_size, section->vma, section->contents);
#endif
}
break;
case EGSD_S_C_SYM:
{
/* symbol specification (definition or reference) */
symbol = _bfd_evax_make_empty_symbol (abfd);
if (symbol == 0)
return -1;
old_flags = bfd_getl16 (evax_rec + 6);
new_flags = BSF_NO_FLAGS;
if (old_flags & EGSY_S_V_WEAK)
new_flags |= BSF_WEAK;
if (evax_rec[6] & EGSY_S_V_DEF) /* symbol definition */
{
symbol->name =
_bfd_evax_save_counted_string ((char *)evax_rec+32);
if (old_flags & EGSY_S_V_NORM)
{ /* proc def */
new_flags |= BSF_FUNCTION;
}
symbol->value = bfd_getl64 (evax_rec+8);
symbol->section = (asection *)((unsigned long) bfd_getl32 (evax_rec+28));
#if EVAX_DEBUG
evax_debug(3, "egsd sym def #%d (%s, %d, %04x=%s)\n", abfd->symcount,
symbol->name, (int)symbol->section, old_flags, flag2str(gsyflagdesc, old_flags));
#endif
}
else /* symbol reference */
{
symbol->name =
_bfd_evax_save_counted_string ((char *)evax_rec+8);
#if EVAX_DEBUG
evax_debug(3, "egsd sym ref #%d (%s, %04x=%s)\n", abfd->symcount,
symbol->name, old_flags, flag2str(gsyflagdesc, old_flags));
#endif
symbol->section = bfd_make_section (abfd, BFD_UND_SECTION_NAME);
}
symbol->flags = new_flags;
/* save symbol in evax_symbol_table */
entry = (evax_symbol_entry *) bfd_hash_lookup (PRIV(evax_symbol_table), symbol->name, true, false);
if (entry == (evax_symbol_entry *)NULL)
{
bfd_set_error (bfd_error_no_memory);
return -1;
}
if (entry->symbol != (asymbol *)NULL)
{ /* FIXME ?, DEC C generates this */
#if EVAX_DEBUG
evax_debug(3, "EGSD_S_C_SYM: duplicate \"%s\"\n", symbol->name);
#endif
}
else
{
entry->symbol = symbol;
PRIV(egsd_sym_count)++;
abfd->symcount++;
}
}
break;
case EGSD_S_C_IDC:
break;
default:
(*_bfd_error_handler) ("unknown egsd subtype %d", gsd_type);
bfd_set_error (bfd_error_bad_value);
return -1;
} /* switch */
PRIV(rec_size) -= gsd_size;
PRIV(evax_rec) += gsd_size;
} /* while (recsize > 0) */
if (abfd->symcount > 0)
abfd->flags |= HAS_SYMS;
return 0;
}
/*-----------------------------------------------------------------------------*/
/* output routines */
/* Write section and symbol directory of bfd abfd */
int
_bfd_evax_write_egsd (abfd)
bfd *abfd;
{
asection *section;
asymbol *symbol;
int symnum;
int last_index = -1;
char dummy_name[10];
char *sname;
flagword new_flags, old_flags;
char uname[200];
char *nptr, *uptr;
#if EVAX_DEBUG
evax_debug (2, "evax_write_egsd(%p)\n", abfd);
#endif
/* output sections */
section = abfd->sections;
#if EVAX_DEBUG
evax_debug (3, "%d sections found\n", abfd->section_count);
#endif
/* egsd is quadword aligned */
_bfd_evax_output_alignment (abfd, 8);
_bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
_bfd_evax_output_long (abfd, 0);
_bfd_evax_output_push (abfd); /* prepare output for subrecords */
while (section != 0)
{
#if EVAX_DEBUG
evax_debug (3, "Section #%d %s, %d bytes\n", section->index, section->name, (int)section->_raw_size);
#endif
/* 13 bytes egsd, max 31 chars name -> should be 44 bytes */
if (_bfd_evax_output_check (abfd, 64) < 0)
{
_bfd_evax_output_pop (abfd);
_bfd_evax_output_end (abfd);
_bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
_bfd_evax_output_long (abfd, 0);
_bfd_evax_output_push (abfd); /* prepare output for subrecords */
}
/* Create dummy sections to keep consecutive indices */
while (section->index - last_index > 1)
{
#if EVAX_DEBUG
evax_debug (3, "index %d, last %d\n", section->index, last_index);
#endif
_bfd_evax_output_begin (abfd, EGSD_S_C_PSC, -1);
_bfd_evax_output_short (abfd, 0);
_bfd_evax_output_short (abfd, 0);
_bfd_evax_output_long (abfd, 0);
sprintf (dummy_name, ".DUMMY%02d", last_index);
_bfd_evax_output_counted (abfd, dummy_name);
_bfd_evax_output_flush (abfd);
last_index++;
}
/* Don't know if this is neccesary for the linker but for now it keeps
evax_slurp_egsd happy */
sname = (char *)section->name;
if (*sname == '.')
{
sname++;
if ((*sname == 't') && (strcmp (sname, "text") == 0))
sname = EVAX_CODE_NAME;
else if ((*sname == 'd') && (strcmp (sname, "data") == 0))
sname = EVAX_DATA_NAME;
else if ((*sname == 'b') && (strcmp (sname, "bss") == 0))
sname = EVAX_BSS_NAME;
else if ((*sname == 'l') && (strcmp (sname, "link") == 0))
sname = EVAX_LINK_NAME;
else if ((*sname == 'r') && (strcmp (sname, "rdata") == 0))
sname = EVAX_READONLY_NAME;
else if ((*sname == 'l') && (strcmp (sname, "literal") == 0))
sname = EVAX_LITERAL_NAME;
else if ((*sname == 'c') && (strcmp (sname, "comm") == 0))
sname = EVAX_COMMON_NAME;
else if ((*sname == 'l') && (strcmp (sname, "lcomm") == 0))
sname = EVAX_LOCAL_NAME;
}
_bfd_evax_output_begin (abfd, EGSD_S_C_PSC, -1);
_bfd_evax_output_short (abfd, section->alignment_power & 0xff);
_bfd_evax_output_short (abfd,
evax_esecflag_by_name (sname,
section->_raw_size));
_bfd_evax_output_long (abfd, section->_raw_size);
_bfd_evax_output_counted (abfd, sname);
_bfd_evax_output_flush (abfd);
last_index = section->index;
section = section->next;
}
/* output symbols */
#if EVAX_DEBUG
evax_debug (3, "%d symbols found\n", abfd->symcount);
#endif
bfd_set_start_address (abfd, (bfd_vma)-1);
for (symnum = 0; symnum < abfd->symcount; symnum++)
{
symbol = abfd->outsymbols[symnum];
if (*(symbol->name) == '_')
{
if (strcmp (symbol->name, "__main") == 0)
bfd_set_start_address (abfd, (bfd_vma)symbol->value);
}
old_flags = symbol->flags;
if ((*(symbol->section->name+1) == 'c')
&& (strcmp (symbol->section->name+1, "comm") == 0)
&& (strcmp (symbol->name, ".comm") != 0))
old_flags |= BSF_GLOBAL;
if (old_flags & BSF_FILE)
continue;
if (((old_flags & BSF_GLOBAL) == 0) /* not xdef */
&& (!bfd_is_und_section (symbol->section))) /* and not xref */
continue; /* dont output */
/* 13 bytes egsd, max 64 chars name -> should be 77 bytes */
if (_bfd_evax_output_check (abfd, 80) < 0)
{
_bfd_evax_output_pop (abfd);
_bfd_evax_output_end (abfd);
_bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
_bfd_evax_output_long (abfd, 0);
_bfd_evax_output_push (abfd); /* prepare output for subrecords */
}
_bfd_evax_output_begin (abfd, EGSD_S_C_SYM, -1);
_bfd_evax_output_short (abfd, 0); /* data type, alignment */
new_flags = 0;
if (old_flags & BSF_WEAK)
new_flags |= EGSY_S_V_WEAK;
if (old_flags & BSF_FUNCTION)
{
new_flags |= EGSY_S_V_NORM;
new_flags |= EGSY_S_V_REL;
}
if (old_flags & BSF_GLOBAL)
{
new_flags |= EGSY_S_V_DEF;
if (!bfd_is_abs_section (symbol->section))
new_flags |= EGSY_S_V_REL;
}
_bfd_evax_output_short (abfd, new_flags);
if (old_flags & BSF_GLOBAL) /* symbol definition */
{
if (old_flags & BSF_FUNCTION)
{
_bfd_evax_output_quad (abfd, symbol->value);
_bfd_evax_output_quad (abfd,
((asymbol *)(symbol->udata.p))->value);
_bfd_evax_output_long (abfd,
(((asymbol *)(symbol->udata.p))
->section->index));
_bfd_evax_output_long (abfd, symbol->section->index);
}
else
{
_bfd_evax_output_quad (abfd, symbol->value); /* L_VALUE */
_bfd_evax_output_quad (abfd, 0); /* L_CODE_ADDRESS */
_bfd_evax_output_long (abfd, 0); /* L_CA_PSINDX */
_bfd_evax_output_long (abfd, symbol->section->index);/* L_PSINDX, FIXME */
}
}
_bfd_evax_output_counted (abfd, _bfd_evax_length_hash_symbol (abfd, symbol->name));
_bfd_evax_output_flush (abfd);
}
_bfd_evax_output_alignment (abfd, 8);
_bfd_evax_output_pop (abfd);
_bfd_evax_output_end (abfd);
return 0;
}
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