--- /dev/null
+/* 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 <ansidecl.h>
+#include <sysdep.h>
+#include "bfd.h"
+#include "libbfd.h"
+#include "obstack.h"
+#include "internalcoff.h"
+#include "rs6000coff.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 */
+
projects / deliverable / binutils-gdb.git / commitdiff
