--- /dev/null
+/* Unexec for MIPS (including IRIS4D).
+ Copyright (C) 1988, 1992, 1993, 1994
+ Free Software Foundation, Inc.
+
+This file is part of XEmacs.
+
+XEmacs 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, or (at your option) any
+later version.
+
+XEmacs 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 XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Synched up with: FSF 19.31. */
+\f
+#include <config.h>
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <errno.h>
+#include <varargs.h>
+
+#ifdef MACH
+
+#include <a.out.h>
+
+/* I don't know why this isn't defined. */
+#ifndef STYP_INIT
+#define STYP_INIT 0x80000000
+#endif
+
+/* I don't know why this isn't defined. */
+#ifndef _RDATA
+#define _RDATA ".rdata"
+#define STYP_RDATA 0x00000100
+#endif
+
+/* Small ("near") data section. */
+#ifndef _SDATA
+#define _SDATA ".sdata"
+#define STYP_SDATA 0x00000200
+#endif
+
+/* Small ("near") bss section. */
+#ifndef _SBSS
+#define _SBSS ".sbss"
+#define STYP_SBSS 0x00000400
+#endif
+
+/* We don't seem to have a sym.h or syms.h anywhere, so we'll do it the
+ hard way. This stinks. */
+typedef struct {
+ short magic;
+ short vstamp;
+ long ilineMax;
+ struct { long foo, offset; } offsets[11];
+} HDRR, *pHDRR;
+
+#else /* not MACH */
+
+#include <filehdr.h>
+#include <aouthdr.h>
+#include <scnhdr.h>
+#include <sym.h>
+
+#endif /* not MACH */
+
+#if defined (IRIS_4D) || defined (sony)
+#include "getpagesize.h"
+#include <fcntl.h>
+#endif
+
+static void fatal_unexec ();
+static void mark_x ();
+
+#define READ(_fd, _buffer, _size, _error_message, _error_arg) \
+ errno = EEOF; \
+ if (read (_fd, _buffer, _size) != _size) \
+ fatal_unexec (_error_message, _error_arg);
+
+#define WRITE(_fd, _buffer, _size, _error_message, _error_arg) \
+ if (write (_fd, _buffer, _size) != _size) \
+ fatal_unexec (_error_message, _error_arg);
+
+#define SEEK(_fd, _position, _error_message, _error_arg) \
+ errno = EEOF; \
+ if (lseek (_fd, _position, L_SET) != _position) \
+ fatal_unexec (_error_message, _error_arg);
+
+extern char *strerror ();
+#define EEOF -1
+
+static struct scnhdr *text_section;
+static struct scnhdr *init_section;
+static struct scnhdr *finit_section;
+static struct scnhdr *rdata_section;
+static struct scnhdr *data_section;
+static struct scnhdr *lit8_section;
+static struct scnhdr *lit4_section;
+static struct scnhdr *sdata_section;
+static struct scnhdr *sbss_section;
+static struct scnhdr *bss_section;
+
+struct headers {
+ struct filehdr fhdr;
+ struct aouthdr aout;
+ struct scnhdr section[10];
+};
+
+/* Define name of label for entry point for the dumped executable. */
+
+#ifndef DEFAULT_ENTRY_ADDRESS
+#define DEFAULT_ENTRY_ADDRESS __start
+#endif
+\f
+unexec (new_name, a_name, data_start, bss_start, entry_address)
+ char *new_name, *a_name;
+ unsigned data_start, bss_start, entry_address;
+{
+ int new, old;
+ int pagesize, brk;
+ int newsyms, symrel;
+ int nread;
+ struct headers hdr;
+ int i;
+ int vaddr, scnptr;
+#define BUFSIZE 8192
+ char buffer[BUFSIZE];
+
+ old = open (a_name, O_RDONLY, 0);
+ if (old < 0) fatal_unexec ("opening %s", a_name);
+
+ new = creat (new_name, 0666);
+ if (new < 0) fatal_unexec ("creating %s", new_name);
+
+ hdr = *((struct headers *)TEXT_START);
+#ifdef MIPS2
+ if (hdr.fhdr.f_magic != MIPSELMAGIC
+ && hdr.fhdr.f_magic != MIPSEBMAGIC
+ && hdr.fhdr.f_magic != (MIPSELMAGIC | 1)
+ && hdr.fhdr.f_magic != (MIPSEBMAGIC | 1))
+ {
+ fprintf (stderr,
+ "unexec: input file magic number is %x, not %x, %x, %x or %x.\n",
+ hdr.fhdr.f_magic,
+ MIPSELMAGIC, MIPSEBMAGIC,
+ MIPSELMAGIC | 1, MIPSEBMAGIC | 1);
+ exit(1);
+ }
+#else /* not MIPS2 */
+ if (hdr.fhdr.f_magic != MIPSELMAGIC
+ && hdr.fhdr.f_magic != MIPSEBMAGIC)
+ {
+ fprintf (stderr, "unexec: input file magic number is %x, not %x or %x.\n",
+ hdr.fhdr.f_magic, MIPSELMAGIC, MIPSEBMAGIC);
+ exit (1);
+ }
+#endif /* not MIPS2 */
+ if (hdr.fhdr.f_opthdr != sizeof (hdr.aout))
+ {
+ fprintf (stderr, "unexec: input a.out header is %d bytes, not %d.\n",
+ hdr.fhdr.f_opthdr, sizeof (hdr.aout));
+ exit (1);
+ }
+ if (hdr.aout.magic != ZMAGIC)
+ {
+ fprintf (stderr, "unexec: input file a.out magic number is %o, not %o.\n",
+ hdr.aout.magic, ZMAGIC);
+ exit (1);
+ }
+
+#define CHECK_SCNHDR(ptr, name, flags) \
+ ptr = NULL; \
+ for (i = 0; i < hdr.fhdr.f_nscns && !ptr; i++) \
+ if (strcmp (hdr.section[i].s_name, name) == 0) \
+ { \
+ if (hdr.section[i].s_flags != flags) \
+ fprintf (stderr, "unexec: %x flags (%x expected) in %s section.\n", \
+ hdr.section[i].s_flags, flags, name); \
+ ptr = hdr.section + i; \
+ }
+
+ CHECK_SCNHDR (text_section, _TEXT, STYP_TEXT);
+ CHECK_SCNHDR (init_section, _INIT, STYP_INIT);
+ CHECK_SCNHDR (rdata_section, _RDATA, STYP_RDATA);
+ CHECK_SCNHDR (data_section, _DATA, STYP_DATA);
+#ifdef _LIT8
+ CHECK_SCNHDR (lit8_section, _LIT8, STYP_LIT8);
+ CHECK_SCNHDR (lit4_section, _LIT4, STYP_LIT4);
+#endif /* _LIT8 */
+ CHECK_SCNHDR (sdata_section, _SDATA, STYP_SDATA);
+ CHECK_SCNHDR (sbss_section, _SBSS, STYP_SBSS);
+ CHECK_SCNHDR (bss_section, _BSS, STYP_BSS);
+#if 0 /* Apparently this error check goes off on irix 3.3,
+ but it doesn't indicate a real problem. */
+ if (i != hdr.fhdr.f_nscns)
+ fprintf (stderr, "unexec: %d sections found instead of %d.\n",
+ i, hdr.fhdr.f_nscns);
+#endif
+
+ text_section->s_scnptr = 0;
+
+ pagesize = getpagesize ();
+ /* Casting to int avoids compiler error on NEWS-OS 5.0.2. */
+ brk = (((int) (sbrk (0))) + pagesize - 1) & (-pagesize);
+ hdr.aout.dsize = brk - DATA_START;
+ hdr.aout.bsize = 0;
+ if (entry_address == 0)
+ {
+ extern DEFAULT_ENTRY_ADDRESS ();
+ hdr.aout.entry = (unsigned)DEFAULT_ENTRY_ADDRESS;
+ }
+ else
+ hdr.aout.entry = entry_address;
+
+ hdr.aout.bss_start = hdr.aout.data_start + hdr.aout.dsize;
+ rdata_section->s_size = data_start - DATA_START;
+
+ /* Adjust start and virtual addresses of rdata_section, too. */
+ rdata_section->s_vaddr = DATA_START;
+ rdata_section->s_paddr = DATA_START;
+ rdata_section->s_scnptr = text_section->s_scnptr + hdr.aout.tsize;
+
+ data_section->s_vaddr = data_start;
+ data_section->s_paddr = data_start;
+ data_section->s_size = brk - data_start;
+ data_section->s_scnptr = rdata_section->s_scnptr + rdata_section->s_size;
+ vaddr = data_section->s_vaddr + data_section->s_size;
+ scnptr = data_section->s_scnptr + data_section->s_size;
+ if (lit8_section != NULL)
+ {
+ lit8_section->s_vaddr = vaddr;
+ lit8_section->s_paddr = vaddr;
+ lit8_section->s_size = 0;
+ lit8_section->s_scnptr = scnptr;
+ }
+ if (lit4_section != NULL)
+ {
+ lit4_section->s_vaddr = vaddr;
+ lit4_section->s_paddr = vaddr;
+ lit4_section->s_size = 0;
+ lit4_section->s_scnptr = scnptr;
+ }
+ if (sdata_section != NULL)
+ {
+ sdata_section->s_vaddr = vaddr;
+ sdata_section->s_paddr = vaddr;
+ sdata_section->s_size = 0;
+ sdata_section->s_scnptr = scnptr;
+ }
+ if (sbss_section != NULL)
+ {
+ sbss_section->s_vaddr = vaddr;
+ sbss_section->s_paddr = vaddr;
+ sbss_section->s_size = 0;
+ sbss_section->s_scnptr = scnptr;
+ }
+ if (bss_section != NULL)
+ {
+ bss_section->s_vaddr = vaddr;
+ bss_section->s_paddr = vaddr;
+ bss_section->s_size = 0;
+ bss_section->s_scnptr = scnptr;
+ }
+
+ WRITE (new, (void *) TEXT_START, hdr.aout.tsize,
+ "writing text section to %s", new_name);
+ WRITE (new, (void *) DATA_START, hdr.aout.dsize,
+ "writing data section to %s", new_name);
+
+ SEEK (old, hdr.fhdr.f_symptr, "seeking to start of symbols in %s", a_name);
+ errno = EEOF;
+ nread = read (old, buffer, BUFSIZE);
+ if (nread < sizeof (HDRR)) fatal_unexec ("reading symbols from %s", a_name);
+ newsyms = hdr.aout.tsize + hdr.aout.dsize;
+ symrel = newsyms - hdr.fhdr.f_symptr;
+ hdr.fhdr.f_symptr = newsyms;
+#define symhdr ((pHDRR)buffer)
+#ifdef MACH
+ for (i = 0; i < 11; i++)
+ symhdr->offsets[i].offset += symrel;
+#else
+ symhdr->cbLineOffset += symrel;
+ symhdr->cbDnOffset += symrel;
+ symhdr->cbPdOffset += symrel;
+ symhdr->cbSymOffset += symrel;
+ symhdr->cbOptOffset += symrel;
+ symhdr->cbAuxOffset += symrel;
+ symhdr->cbSsOffset += symrel;
+ symhdr->cbSsExtOffset += symrel;
+ symhdr->cbFdOffset += symrel;
+ symhdr->cbRfdOffset += symrel;
+ symhdr->cbExtOffset += symrel;
+#endif
+#undef symhdr
+ do
+ {
+ if (write (new, buffer, nread) != nread)
+ fatal_unexec ("writing symbols to %s", new_name);
+ nread = read (old, buffer, BUFSIZE);
+ if (nread < 0) fatal_unexec ("reading symbols from %s", a_name);
+#undef BUFSIZE
+ } while (nread != 0);
+
+ SEEK (new, 0, "seeking to start of header in %s", new_name);
+ WRITE (new, &hdr, sizeof (hdr),
+ "writing header of %s", new_name);
+
+ close (old);
+ close (new);
+ mark_x (new_name);
+}
+\f
+/*
+ * mark_x
+ *
+ * After successfully building the new a.out, mark it executable
+ */
+
+static void
+mark_x (name)
+ char *name;
+{
+ struct stat sbuf;
+ int um = umask (777);
+ umask (um);
+ if (stat (name, &sbuf) < 0)
+ fatal_unexec ("getting protection on %s", name);
+ sbuf.st_mode |= 0111 & ~um;
+ if (chmod (name, sbuf.st_mode) < 0)
+ fatal_unexec ("setting protection on %s", name);
+}
+
+static void
+fatal_unexec (s, va_alist)
+ va_dcl
+{
+ va_list ap;
+ if (errno == EEOF)
+ fputs ("unexec: unexpected end of file, ", stderr);
+ else
+ fprintf (stderr, "unexec: %s, ", strerror (errno));
+ va_start (ap);
+ _doprnt (s, ap, stderr);
+ fputs (".\n", stderr);
+ exit (1);
+}
projects / chise / xemacs-chise.git- / blobdiff