Initial revision

1 files changed, 500 insertions, 0 deletions

diff --git a/bfd/coff-rs6000.c b/bfd/coff-rs6000.c
new file mode 100644
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--- /dev/null
+++ b/bfd/coff-rs6000.c
@@ -0,0 +1,500 @@
+/* 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 */
+