499 lines
14 KiB
C
499 lines
14 KiB
C
/* IBM RS/6000 "XCOFF" back-end for BFD.
|
|
Copyright (C) 1990, 1991 Free Software Foundation, Inc.
|
|
Written by Metin G. Ozisik, Mimi Phûông-Thåo Võ, and John Gilmore.
|
|
Archive support from Damon A. Permezel.
|
|
Contributed by IBM Corporation and Cygnus Support.
|
|
|
|
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. */
|
|
|
|
/* This port currently only handles reading object files -- no archive
|
|
support, no core files, and no writing. FIXME. */
|
|
|
|
/* Internalcoff.h and coffcode.h modify themselves based on this flag. */
|
|
#define RS6000COFF_C 1
|
|
|
|
#include "bfd.h"
|
|
#include "sysdep.h"
|
|
#include "libbfd.h"
|
|
#include "obstack.h"
|
|
#include "internalcoff.h"
|
|
#include "coff-rs6000.h"
|
|
#include "libcoff.h"
|
|
|
|
/* The main body of code is in coffcode.h. */
|
|
#include "coffcode.h"
|
|
|
|
|
|
#if 0
|
|
/* These are not yet ready for prime time. */
|
|
#define coff_core_file_matches_executable_p \
|
|
rs6000coff_core_file_matches_executable_p
|
|
#define coff_get_section_contents rs6000coff_get_section_contents
|
|
#define coff_openr_next_archived_file rs6000coff_openr_next_archived_file
|
|
#define coff_write_armap rs6000coff_write_armap
|
|
#define coff_stat_arch_elt rs6000coff_stat_arch_elt
|
|
#define coff_snarf_ar_hdr rs6000coff_snarf_ar_hdr
|
|
#define coff_mkarchive rs6000coff_mkarchive
|
|
|
|
static bfd_target *rs6000coff_archive_p ();
|
|
static bfd_target *rs6000coff_core_p ();
|
|
static bfd_target *rs6000coff_object_p ();
|
|
static bfd_target *rs6000coff_real_object_p ();
|
|
#endif
|
|
|
|
bfd_target rs6000coff_vec =
|
|
{
|
|
"coff-rs6000", /* 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 | SEC_LOAD | SEC_RELOC), /* section flags */
|
|
'/', /* ar_pad_char */
|
|
15, /* ar_max_namelen??? FIXMEmgo */
|
|
3, /* default alignment power */
|
|
|
|
_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
|
|
_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
|
|
|
|
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
|
|
bfd_generic_archive_p, _bfd_dummy_target},
|
|
{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
|
|
bfd_false},
|
|
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
|
|
_bfd_write_archive_contents, bfd_false},
|
|
|
|
JUMP_TABLE(coff),
|
|
COFF_SWAP_TABLE
|
|
|
|
};
|
|
|
|
|
|
#if 0 /* we don't have include file for this yet */
|
|
/* ------------------------------------------------------------------------ */
|
|
/* Support for archive file stuff.. */
|
|
/* Stolen from Damon A. Parmazel's `bfd' portation. */
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
#include "/usr/include/ar.h" /* <ar.h> doesn't do it. */
|
|
|
|
|
|
#define arch_hdr(bfd) \
|
|
((struct ar_hdr *) \
|
|
(((struct areltdata *)((bfd)->arelt_data))->arch_header))
|
|
|
|
|
|
static boolean
|
|
rs6000coff_mkarchive (abfd)
|
|
bfd *abfd;
|
|
{
|
|
bfd_error = invalid_operation; /* write not supported */
|
|
}
|
|
|
|
|
|
/* This functions reads an arch header and returns an areltdata pointer, or
|
|
NULL on error.
|
|
|
|
Presumes the file pointer is already in the right place (ie pointing
|
|
to the ar_hdr in the file). Moves the file pointer; on success it
|
|
should be pointing to the front of the file contents; on failure it
|
|
could have been moved arbitrarily.
|
|
*/
|
|
|
|
struct areltdata *
|
|
rs6000coff_snarf_ar_hdr (abfd)
|
|
bfd *abfd;
|
|
{
|
|
extern int errno;
|
|
|
|
struct {
|
|
struct ar_hdr hdr;
|
|
char namebuf[256];
|
|
} h;
|
|
int size;
|
|
struct areltdata *ared;
|
|
unsigned int namelen = 0;
|
|
char *allocptr;
|
|
|
|
size = sizeof (h.hdr);
|
|
if (bfd_read(&h.hdr, 1, size, abfd) != size) {
|
|
bfd_error = no_more_archived_files;
|
|
return NULL;
|
|
}
|
|
size = atoi(h.hdr.ar_namlen); /* ar_name[] length */
|
|
size += size & 1;
|
|
|
|
if (bfd_read(&h.hdr._ar_name.ar_name[2], 1, size, abfd) != size) {
|
|
bfd_error = no_more_archived_files;
|
|
return NULL;
|
|
}
|
|
|
|
if (strncmp(h.hdr._ar_name.ar_fmag + size, AIAFMAG, 2)) {
|
|
bfd_error = malformed_archive;
|
|
return NULL;
|
|
}
|
|
|
|
h.hdr._ar_name.ar_name[size] = 0; /* terminate filename */
|
|
|
|
/*
|
|
* if the filename is NULL, we're (probably) at the end.
|
|
*/
|
|
if (size == 0) {
|
|
bfd_error = no_more_archived_files;
|
|
return NULL;
|
|
}
|
|
|
|
size += sizeof (h.hdr);
|
|
allocptr = bfd_zalloc(abfd, sizeof (*ared) + size);
|
|
|
|
if (allocptr == NULL) {
|
|
bfd_error = no_memory;
|
|
return NULL;
|
|
}
|
|
|
|
ared = (struct areltdata *) allocptr;
|
|
|
|
ared->arch_header = (void *) (allocptr + sizeof (struct areltdata));
|
|
memcpy ((char *) ared->arch_header, &h.hdr, size);
|
|
ared->parsed_size = atoi(h.hdr.ar_size);
|
|
ared->filename = ((AR_HDR*) ared->arch_header)->_ar_name.ar_name;
|
|
|
|
return ared;
|
|
}
|
|
|
|
/*
|
|
* xcoff_openr_next_archived_file - xcoff has nxt/prv seek addrs.
|
|
*/
|
|
static bfd *
|
|
rs6000coff_openr_next_archived_file(archive, last_file)
|
|
bfd *archive, *last_file;
|
|
{
|
|
file_ptr filestart;
|
|
|
|
if (!last_file)
|
|
filestart = bfd_ardata(archive)->first_file_filepos;
|
|
else
|
|
filestart = atol(arch_hdr(last_file)->ar_nxtmem);
|
|
|
|
return get_elt_at_filepos (archive, filestart);
|
|
}
|
|
|
|
|
|
static bfd_target *
|
|
rs6000coff_archive_p (abfd)
|
|
bfd *abfd;
|
|
{
|
|
struct fl_hdr hdr;
|
|
register struct artdata *art;
|
|
|
|
if (bfd_read (&hdr, 1, sizeof (hdr), abfd) != sizeof (hdr)) {
|
|
bfd_error = wrong_format;
|
|
return 0;
|
|
}
|
|
|
|
if (strncmp(hdr.fl_magic, AIAMAG, SAIAMAG)) {
|
|
bfd_error = wrong_format;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* bfd_ardata() accesses the bfd->tdata field.
|
|
*/
|
|
abfd->tdata = (void *) bfd_zalloc(abfd, sizeof (*art) + sizeof (hdr));
|
|
if ((art = bfd_ardata (abfd)) == NULL) {
|
|
bfd_error = no_memory;
|
|
return 0;
|
|
}
|
|
|
|
art->first_file_filepos = atoi(hdr.fl_fstmoff);
|
|
*(struct fl_hdr *) (1 + art) = hdr;
|
|
|
|
/*
|
|
* slurp in the member table, which I thing is the armap equivalent.
|
|
xcoff_slurp_armap(abfd);
|
|
*/
|
|
|
|
if (abfd->obj_arch == bfd_arch_unknown) /* FIXME!!! */
|
|
abfd->obj_arch = bfd_arch_rs6000;
|
|
|
|
return abfd->xvec;
|
|
}
|
|
|
|
|
|
static int
|
|
rs6000coff_stat_arch_elt(abfd, buf)
|
|
bfd *abfd;
|
|
struct stat *buf;
|
|
{
|
|
struct ar_hdr *hdr;
|
|
char *aloser;
|
|
|
|
if (abfd->arelt_data == NULL) {
|
|
bfd_error = invalid_operation;
|
|
return -1;
|
|
}
|
|
|
|
hdr = arch_hdr (abfd);
|
|
|
|
#define foo(arelt, stelt, size) \
|
|
buf->stelt = strtol (hdr->arelt, &aloser, size); \
|
|
if (aloser == hdr->arelt) return -1;
|
|
|
|
foo (ar_date, st_mtime, 10);
|
|
foo (ar_uid, st_uid, 10);
|
|
foo (ar_gid, st_gid, 10);
|
|
foo (ar_mode, st_mode, 8);
|
|
foo (ar_size, st_size, 10);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static boolean
|
|
rs6000coff_write_armap (arch, elength, map, orl_count, stridx)
|
|
bfd *arch;
|
|
unsigned int elength;
|
|
struct orl *map;
|
|
{
|
|
bfd_error = invalid_operation;
|
|
return false;
|
|
}
|
|
|
|
|
|
#endif /* if 0 */
|
|
|
|
#if 0 /* not sure if this will work on all hosts yet! */
|
|
#ifdef AOUTHDR
|
|
#undef AOUTHDR
|
|
#endif
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
/* Support for core file stuff.. */
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
#include <sys/user.h>
|
|
#include <sys/ldr.h>
|
|
#include <sys/core.h>
|
|
|
|
|
|
/* Number of special purpose registers supported bygdb. This value should match
|
|
`tm.h' in gdb directory. Clean this mess up and use the macros in sys/reg.h.
|
|
FIXMEmgo. */
|
|
|
|
#define NUM_OF_SPEC_REGS 7
|
|
#define STACK_END_ADDR 0x2ff80000
|
|
|
|
#define core_hdr(bfd) (((Rs6kCorData*)(bfd->tdata))->hdr)
|
|
#define core_datasec(bfd) (((Rs6kCorData*)(bfd->tdata))->data_section)
|
|
#define core_stacksec(bfd) (((Rs6kCorData*)(bfd->tdata))->stack_section)
|
|
#define core_regsec(bfd) (((Rs6kCorData*)(bfd->tdata))->reg_section)
|
|
#define core_reg2sec(bfd) (((Rs6kCorData*)(bfd->tdata))->reg2_section)
|
|
|
|
/* These are stored in the bfd's tdata */
|
|
typedef struct {
|
|
struct core *hdr; /* core file header */
|
|
asection *data_section,
|
|
*stack_section,
|
|
*reg_section, /* section for GPRs and special registers. */
|
|
*reg2_section; /* section for FPRs. */
|
|
} Rs6kCorData;
|
|
|
|
|
|
/* Decide if a given bfd represents a `core' file or not. There really is no
|
|
magic number or anything like, in rs6000coff. */
|
|
|
|
static bfd_target *
|
|
rs6000coff_core_p (abfd)
|
|
bfd *abfd;
|
|
{
|
|
int fd;
|
|
struct core_dump coredata;
|
|
struct stat statbuf;
|
|
char *tmpptr;
|
|
|
|
/* Use bfd_xxx routines, rather than O/S primitives to read coredata. FIXMEmgo */
|
|
fd = open (abfd->filename, O_RDONLY);
|
|
|
|
fstat (fd, &statbuf);
|
|
read (fd, &coredata, sizeof (struct core_dump));
|
|
|
|
close (fd);
|
|
|
|
if (coredata.c_tab < (sizeof (coredata.c_u) + (int)&coredata.c_u - (int)&coredata.c_signo) ||
|
|
coredata.c_tab >= statbuf.st_size ||
|
|
(long)coredata.c_stack <= (long)coredata.c_tab ) {
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
If it looks like core file, then.....
|
|
read core file header..... (maybe you've done it above..)
|
|
*/
|
|
|
|
/* maybe you should alloc space for the whole core chunk over here!! FIXMEmgo */
|
|
tmpptr = (char*)bfd_zalloc (abfd, sizeof (Rs6kCorData));
|
|
set_tdata (abfd, tmpptr);
|
|
|
|
/* .stack section. */
|
|
if ((core_stacksec (abfd) = (asection*) bfd_zalloc (abfd, sizeof (asection)))
|
|
== NULL) {
|
|
bfd_error = no_memory;
|
|
/* bfd_release (abfd, ???? ) */
|
|
return NULL;
|
|
}
|
|
core_stacksec (abfd)->name = ".stack";
|
|
core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD;
|
|
core_stacksec (abfd)->size = coredata.c_size;
|
|
core_stacksec (abfd)->vma = STACK_END_ADDR - coredata.c_size;
|
|
core_stacksec (abfd)->filepos = coredata.c_stack; /*???? */
|
|
|
|
/* .reg section for GPRs and special registers. */
|
|
if ((core_regsec (abfd) = (asection*) bfd_zalloc (abfd, sizeof (asection)))
|
|
== NULL) {
|
|
bfd_error = no_memory;
|
|
/* bfd_release (abfd, ???? ) */
|
|
return NULL;
|
|
}
|
|
core_regsec (abfd)->name = ".reg";
|
|
core_regsec (abfd)->flags = SEC_ALLOC;
|
|
core_regsec (abfd)->size = (32 + NUM_OF_SPEC_REGS) * 4;
|
|
core_regsec (abfd)->vma = NULL; /* not used?? */
|
|
core_regsec (abfd)->filepos =
|
|
(char*)&coredata.c_u.u_save - (char*)&coredata;
|
|
|
|
/* .reg2 section for FPRs (floating point registers). */
|
|
if ((core_reg2sec (abfd) = (asection*) bfd_zalloc (abfd, sizeof (asection)))
|
|
== NULL) {
|
|
bfd_error = no_memory;
|
|
/* bfd_release (abfd, ???? ) */
|
|
return NULL;
|
|
}
|
|
core_reg2sec (abfd)->name = ".reg2";
|
|
core_reg2sec (abfd)->flags = SEC_ALLOC;
|
|
core_reg2sec (abfd)->size = 8 * 32; /* 32 FPRs. */
|
|
core_reg2sec (abfd)->vma = NULL; /* not used?? */
|
|
core_reg2sec (abfd)->filepos =
|
|
(char*)&coredata.c_u.u_save.fpr[0] - (char*)&coredata;
|
|
|
|
/* set up section chain here. */
|
|
abfd->section_count = 3;
|
|
abfd->sections = core_stacksec (abfd);
|
|
core_stacksec (abfd)->next = core_regsec(abfd);
|
|
core_regsec (abfd)->next = core_reg2sec (abfd);
|
|
core_reg2sec (abfd)->next = NULL;
|
|
|
|
return abfd->xvec; /* this is garbage for now. */
|
|
}
|
|
|
|
|
|
|
|
/* return `true' if given core is from the given executable.. */
|
|
static boolean
|
|
rs6000coff_core_file_matches_executable_p (core_bfd, exec_bfd)
|
|
bfd *core_bfd;
|
|
bfd *exec_bfd;
|
|
{
|
|
FILE *fd;
|
|
struct core_dump coredata;
|
|
struct ld_info ldinfo;
|
|
char pathname [1024];
|
|
char *str1, *str2;
|
|
|
|
/* Use bfd_xxx routines, rather than O/S primitives, do error checking!!
|
|
FIXMEmgo */
|
|
fd = fopen (core_bfd->filename, "r");
|
|
|
|
fread (&coredata, sizeof (struct core_dump), 1, fd);
|
|
fseek (fd, (long)coredata.c_tab, 0);
|
|
fread (&ldinfo, (char*)&ldinfo.ldinfo_filename[0] - (char*)&ldinfo.ldinfo_next,
|
|
1, fd);
|
|
fscanf (fd, "%s", pathname);
|
|
printf ("path: %s\n", pathname);
|
|
|
|
str1 = strrchr (pathname, '/');
|
|
str2 = strrchr (exec_bfd->filename, '/');
|
|
|
|
/* step over character '/' */
|
|
str1 = str1 ? str1+1 : &pathname[0];
|
|
str2 = str2 ? str2+1 : exec_bfd->filename;
|
|
|
|
fclose (fd);
|
|
return strcmp (str1, str2);
|
|
}
|
|
|
|
|
|
static boolean
|
|
rs6000coff_get_section_contents (abfd, section, location, offset, count)
|
|
bfd *abfd;
|
|
sec_ptr section;
|
|
PTR location;
|
|
file_ptr offset;
|
|
int count;
|
|
{
|
|
if (count == 0)
|
|
return true;
|
|
|
|
/* Reading a core file's sections will be slightly different. For the
|
|
rest of them we can use bfd_generic_get_section_contents () I suppose. */
|
|
/* Make sure this routine works for any bfd and any section. FIXMEmgo. */
|
|
|
|
if (abfd->format == bfd_core && strcmp (section->name, ".reg") == 0) {
|
|
|
|
struct mstsave mstatus;
|
|
int regoffset = (char*)&mstatus.gpr[0] - (char*)&mstatus;
|
|
|
|
/* Assert that the only way this code will be executed is reading the
|
|
whole section. */
|
|
if (offset || count != (sizeof(mstatus.gpr) + (4 * NUM_OF_SPEC_REGS)))
|
|
printf ("ERROR! in rs6000coff_get_section_contents()\n");
|
|
|
|
/* for `.reg' section, `filepos' is a pointer to the `mstsave' structure
|
|
in the core file. */
|
|
|
|
/* read GPR's into the location. */
|
|
if ( bfd_seek(abfd, section->filepos + regoffset, SEEK_SET) == -1
|
|
|| bfd_read(location, 1, sizeof (mstatus.gpr), abfd) != sizeof (mstatus.gpr))
|
|
return (false); /* on error */
|
|
|
|
/* increment location to the beginning of special registers in the section,
|
|
reset register offset value to the beginning of first special register
|
|
in mstsave structure, and read special registers. */
|
|
|
|
location = (PTR) ((char*)location + sizeof (mstatus.gpr));
|
|
regoffset = (char*)&mstatus.iar - (char*)&mstatus;
|
|
|
|
if ( bfd_seek(abfd, section->filepos + regoffset, SEEK_SET) == -1
|
|
|| bfd_read(location, 1, 4 * NUM_OF_SPEC_REGS, abfd) !=
|
|
4 * NUM_OF_SPEC_REGS)
|
|
return (false); /* on error */
|
|
|
|
/* increment location address, and read the special registers.. */
|
|
/* FIXMEmgo */
|
|
return (true);
|
|
}
|
|
|
|
/* else, use default bfd section content transfer. */
|
|
else
|
|
return bfd_generic_get_section_contents
|
|
(abfd, section, location, offset, count);
|
|
}
|
|
|
|
#endif /* if 0 - for CORE */
|