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- /* evax-egsd.c -- BFD back-end for ALPHA EVAX (openVMS/AXP) files.
- Copyright 1996 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 KΣmpf (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 "$LITERAL$"
-
- 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, 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; /* FIXME: should be cooked size */
- section->contents = (unsigned char *) malloc (section->_raw_size);
- if (section->contents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return -1;
- }
- memset (section->contents, 0, 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 */
- {
- #if EVAX_DEBUG
- evax_debug(3, "egsd sym ref #%d (%s, %04x=%s)\n", abfd->symcount, evax_rec+9, old_flags, flag2str(gsyflagdesc, old_flags));
- #endif
- symbol->name =
- _bfd_evax_save_counted_string ((char *)evax_rec+8);
- 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;
- }
-
- _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 (((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 */
- }
- }
- if (strlen ((char *)symbol->name) > 198)
- {
- (*_bfd_error_handler) ("Name '%s' too long\n", symbol->name);
- abort ();
- }
- nptr = (char *)symbol->name;
- uptr = uname;
- while (*nptr)
- {
- if (islower (*nptr))
- *uptr = toupper (*nptr);
- else
- *uptr = *nptr;
- uptr++;
- nptr++;
- }
- *uptr = 0;
- _bfd_evax_output_counted (abfd, uname);
-
- _bfd_evax_output_flush (abfd);
-
- }
-
- _bfd_evax_output_alignment (abfd, 8);
- _bfd_evax_output_pop (abfd);
- _bfd_evax_output_end (abfd);
-
- return 0;
- }
-