--- /dev/null
+/* machine description file For the alpha chip.
+ Copyright (C) 1994 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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 1, or (at your option)
+any later version.
+
+GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+/* The following line tells the configuration script what sort of
+ operating system this machine is likely to run.
+ USUAL-OPSYS="note"
+
+NOTE-START
+Use -opsystem=osf1
+NOTE-END
+
+*/
+
+/* The following three symbols give information on
+ the size of various data types. */
+
+#define SHORTBITS 16 /* Number of bits in a short */
+
+#define INTBITS 32 /* Number of bits in an int */
+
+#define LONGBITS 64 /* Number of bits in a long */
+
+/* Define BIG_ENDIAN iff lowest-numbered byte in a word
+ is the most significant byte. */
+
+/* Alpha is not big-endian #define BIG_ENDIAN */
+
+/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
+ * group of arguments and treat it as an array of the arguments. */
+
+#define NO_ARG_ARRAY
+
+/* Define WORD_MACHINE if addresses and such have
+ * to be corrected before they can be used as byte counts. */
+
+/* #define WORD_MACHINE */
+
+/* Now define a symbol for the cpu type, if your compiler
+ does not define it automatically:
+ Ones defined so far include vax, m68000, ns16000, pyramid,
+ orion, tahoe, APOLLO and many others */
+
+/* __alpha defined automatically */
+
+
+/* Use type EMACS_INT rather than a union, to represent Lisp_Object */
+/* This is desirable for most machines. */
+
+#define NO_UNION_TYPE
+
+/* Define the type to use. */
+#define EMACS_INT long
+#define EMACS_UINT unsigned long
+
+/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
+ the 24-bit bit field into an int. In other words, if bit fields
+ are always unsigned.
+
+ If you use NO_UNION_TYPE, this flag does not matter. */
+
+#define EXPLICIT_SIGN_EXTEND
+
+/* Data type of load average, as read out of kmem. */
+
+#define LOAD_AVE_TYPE long
+
+/* Convert that into an integer that is 100 for a load average of 1.0 */
+
+#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
+
+/* Define CANNOT_DUMP on machines where unexec does not work.
+ Then the function dump-emacs will not be defined
+ and temacs will do (load "loadup") automatically unless told otherwise. */
+
+/* #define CANNOT_DUMP */
+
+/* Define VIRT_ADDR_VARIES if the virtual addresses of
+ pure and impure space as loaded can vary, and even their
+ relative order cannot be relied on.
+
+ Otherwise Emacs assumes that text space precedes data space,
+ numerically. */
+
+/* #define VIRT_ADDR_VARIES */
+
+/* Define C_ALLOCA if this machine does not support a true alloca
+ and the one written in C should be used instead.
+ Define HAVE_ALLOCA to say that the system provides a properly
+ working alloca function and it should be used.
+ Define neither one if an assembler-language alloca
+ in the file alloca.s should be used. */
+
+#define HAVE_ALLOCA
+
+/* GNU malloc and the relocating allocator do not work together
+ with X. */
+
+#define SYSTEM_MALLOC
+
+/* Define NO_REMAP if memory segmentation makes it not work well
+ to change the boundary between the text section and data section
+ when Emacs is dumped. If you define this, the preloaded Lisp
+ code will not be sharable; but that's better than failing completely. */
+
+#define NO_REMAP
+
+/* Some really obscure 4.2-based systems (like Sequent DYNIX)
+ * do not support asynchronous I/O (using SIGIO) on sockets,
+ * even though it works fine on tty's. If you have one of
+ * these systems, define the following, and then use it in
+ * config.h (or elsewhere) to decide when (not) to use SIGIO.
+ *
+ * You'd think this would go in an operating-system description file,
+ * but since it only occurs on some, but not all, BSD systems, the
+ * reasonable place to select for it is in the machine description
+ * file.
+ */
+
+/* #define NO_SOCK_SIGIO */
+
+
+#define HAVE_X11R4
+#define HAVE_X11R5
+
+
+/* Describe layout of the address space in an executing process. */
+
+#define TEXT_START 0x120000000
+#define DATA_START 0x140000000
+
+/* This is necessary for mem-limits.h, so that start_of_data gives
+ the correct value */
+
+#define DATA_SEG_BITS 0x140000000
+
+
+#define ORDINARY_LINK
+
+#define LIBS_DEBUG
+#define START_FILES pre-crt0.o
+
+
+/* The program to be used for unexec. */
+
+#define UNEXEC unexalpha.o
+
+
+#define PNTR_COMPARISON_TYPE unsigned long
+
+/* On the 64 bit architecture, we can use 56 bits for addresses */
+
+#define VALBITS 56
+
+
+/* This definition of MARKBIT is necessary because of the comparison of
+ ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
+
+#define MARKBIT 0x8000000000000000L
+
+
+/* Define XINT and XUINT so that they can take arguments of type int */
+
+#define XINT(a) (((long)(a) << LONGBITS-VALBITS) >> LONGBITS-VALBITS)
+#define XUINT(a) ((long)(a) & VALMASK)
+
+/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
+
+#define XPNTR(a) XUINT (a)
+
+
+/* Similarly, for XSETINT */
+
+#define XSETINT(a, b) ((a) = (long)((a) & ~VALMASK) | (long)((b) & VALMASK))
+
+
+/* Make PURESIZE twice as large, as pointers are 64 bit */
+
+#ifdef MULTI_FRAME
+#define PURESIZE 460000
+#else
+#define PURESIZE 400000
+#endif
+
+
--- /dev/null
+/* Unexec for DEC alpha. schoepf@sc.ZIB-Berlin.DE (Rainer Schoepf).
+
+ Copyright (C) 1994 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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.
+
+GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+\f
+#include <config.h>
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <stdio.h>
+#include <varargs.h>
+#include <filehdr.h>
+#include <aouthdr.h>
+#include <scnhdr.h>
+#include <syms.h>
+
+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 int errno;
+extern char *strerror ();
+
+void *sbrk();
+
+#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 *pdata_section;
+static struct scnhdr *xdata_section;
+static struct scnhdr *got_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;
+
+static unsigned int Brk;
+
+struct headers {
+ struct filehdr fhdr;
+ struct aouthdr aout;
+ struct scnhdr section[_MIPS_NSCNS_MAX];
+};
+
+
+
+/* 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 long data_start, bss_start, entry_address;
+{
+ int new, old;
+ char * oldptr;
+ struct headers ohdr, nhdr;
+ struct stat stat;
+ long pagesize, brk;
+ long newsyms, symrel;
+ int nread;
+ int i;
+ long vaddr, scnptr;
+#define BUFSIZE 8192
+ char buffer[BUFSIZE];
+
+ if ((old = open (a_name, O_RDONLY)) < 0)
+ fatal_unexec ("opening %s", a_name);
+
+ new = creat (new_name, 0666);
+ if (new < 0) fatal_unexec ("creating %s", new_name);
+
+ if ((fstat (old, &stat) == -1))
+ fatal_unexec ("fstat %s", a_name);
+
+ oldptr = (char *)mmap (0, stat.st_size, PROT_READ, MAP_FILE|MAP_SHARED, old, 0);
+
+ if (oldptr == (char *)-1)
+ fatal_unexec ("mmap %s", a_name);
+
+ close (old);
+
+ /* This is a copy of the a.out header of the original executable */
+
+ ohdr = (*(struct headers *)oldptr);
+
+ /* This is where we build the new header from the in-memory copy */
+
+ nhdr = *((struct headers *)TEXT_START);
+
+ /* First do some consistency checks */
+
+ if (nhdr.fhdr.f_magic != ALPHAMAGIC
+ && nhdr.fhdr.f_magic != ALPHAUMAGIC)
+ {
+ fprintf (stderr, "unexec: input file magic number is %x, not %x or %x.\n",
+ nhdr.fhdr.f_magic, ALPHAMAGIC, ALPHAUMAGIC);
+ exit (1);
+ }
+
+ if (nhdr.fhdr.f_opthdr != sizeof (nhdr.aout))
+ {
+ fprintf (stderr, "unexec: input a.out header is %d bytes, not %d.\n",
+ nhdr.fhdr.f_opthdr, sizeof (nhdr.aout));
+ exit (1);
+ }
+ if (nhdr.aout.magic != ZMAGIC)
+ {
+ fprintf (stderr, "unexec: input file a.out magic number is %o, not %o.\n",
+ nhdr.aout.magic, ZMAGIC);
+ exit (1);
+ }
+
+
+ /* Now check the existence of certain header section and grab
+ their addresses. */
+
+#define CHECK_SCNHDR(ptr, name, flags) \
+ ptr = NULL; \
+ for (i = 0; i < nhdr.fhdr.f_nscns && !ptr; i++) \
+ if (strcmp (nhdr.section[i].s_name, name) == 0) \
+ { \
+ if (nhdr.section[i].s_flags != flags) \
+ fprintf (stderr, "unexec: %x flags (%x expected) in %s section.\n", \
+ nhdr.section[i].s_flags, flags, name); \
+ ptr = nhdr.section + i; \
+ } \
+
+ CHECK_SCNHDR (text_section, _TEXT, STYP_TEXT);
+ CHECK_SCNHDR (init_section, _INIT, STYP_INIT);
+#ifdef _FINI
+ CHECK_SCNHDR (finit_section, _FINI, STYP_FINI);
+#endif /* _FINI */
+ CHECK_SCNHDR (rdata_section, _RDATA, STYP_RDATA);
+#ifdef _PDATA
+ CHECK_SCNHDR (pdata_section, _PDATA, STYP_PDATA);
+#endif _PDATA
+#ifdef _GOT
+ CHECK_SCNHDR (got_section, _GOT, STYP_GOT);
+#endif _GOT
+ CHECK_SCNHDR (data_section, _DATA, STYP_DATA);
+#ifdef _XDATA
+ CHECK_SCNHDR (xdata_section, _XDATA, STYP_XDATA);
+#endif /* _XDATA */
+#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 != nhdr.fhdr.f_nscns)
+ fprintf (stderr, "unexec: %d sections found instead of %d.\n",
+ i, nhdr.fhdr.f_nscns);
+#endif
+
+
+ pagesize = getpagesize ();
+ brk = (((long) (sbrk (0))) + pagesize - 1) & (-pagesize);
+
+ /* Remember the current break */
+
+ Brk = brk;
+
+ nhdr.aout.dsize = brk - DATA_START;
+ nhdr.aout.bsize = 0;
+ if (entry_address == 0)
+ {
+ extern DEFAULT_ENTRY_ADDRESS ();
+ nhdr.aout.entry = (unsigned long)DEFAULT_ENTRY_ADDRESS;
+ }
+ else
+ nhdr.aout.entry = entry_address;
+
+ nhdr.aout.bss_start = nhdr.aout.data_start + nhdr.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 + nhdr.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;
+ }
+#ifdef _XDATA
+ if (xdata_section != NULL)
+ {
+ xdata_section->s_vaddr = vaddr;
+ xdata_section->s_paddr = vaddr;
+ xdata_section->s_size = 0;
+ xdata_section->s_scnptr = scnptr;
+ }
+#endif
+#ifdef _GOT
+ if (got_section != NULL)
+ {
+ got_section->s_vaddr = vaddr;
+ got_section->s_paddr = vaddr;
+ got_section->s_size = 0;
+ got_section->s_scnptr = scnptr;
+ }
+#endif /*_GOT */
+ 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, (char *)TEXT_START, nhdr.aout.tsize,
+ "writing text section to %s", new_name);
+ WRITE (new, (char *)DATA_START, nhdr.aout.dsize,
+ "writing data section to %s", new_name);
+
+
+ /*
+ * Construct new symbol table header
+ */
+
+ bcopy (oldptr + nhdr.fhdr.f_symptr, buffer, cbHDRR);
+
+#define symhdr ((pHDRR)buffer)
+ newsyms = nhdr.aout.tsize + nhdr.aout.dsize;
+ symrel = newsyms - nhdr.fhdr.f_symptr;
+ nhdr.fhdr.f_symptr = newsyms;
+ 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;
+
+ WRITE (new, buffer, cbHDRR, "writing symbol table header of %s", new_name);
+
+ /*
+ * Copy the symbol table and line numbers
+ */
+ WRITE (new, oldptr + ohdr.fhdr.f_symptr + cbHDRR,
+ stat.st_size - ohdr.fhdr.f_symptr - cbHDRR,
+ "writing symbol table of %s", new_name);
+
+#if 0
+
+/* Not needed for now */
+
+ update_dynamic_symbols (oldptr, new, newsyms,
+ ((pHDRR) (oldptr + ohdr.fhdr.f_symptr))->issExtMax,
+ ((pHDRR) (oldptr + ohdr.fhdr.f_symptr))->cbExtOffset,
+ ((pHDRR) (oldptr + ohdr.fhdr.f_symptr))->cbSsExtOffset);
+
+#endif
+
+#undef symhdr
+
+ SEEK (new, 0, "seeking to start of header in %s", new_name);
+ WRITE (new, &nhdr, sizeof (nhdr),
+ "writing header of %s", new_name);
+
+ close (old);
+ close (new);
+ mark_x (new_name);
+}
+
+
+#if 0
+
+/* Not needed for now */
+
+/* The following function updates the values of some symbols
+ that are used by the dynamic loader:
+
+ _edata
+ _end
+
+*/
+
+
+update_dynamic_symbols (old, new, newsyms, nsyms, symoff, stroff)
+char *old; /* Pointer to old executable */
+int new; /* File descriptor for new executable */
+long newsyms; /* Offset of Symbol table in new executable */
+int nsyms; /* Number of symbol table entries */
+long symoff; /* Offset of External Symbols in old file */
+long stroff; /* Offset of string table in old file */
+{
+ long i;
+ int found = 0;
+ EXTR n_end, n_edata;
+
+ /* We go through the symbol table entries until we have found the two
+ symbols. */
+
+ /* cbEXTR is the size of an external symbol table entry */
+
+ for (i = 0; i < nsyms && found < 2; i += cbEXTR)
+ {
+ register pEXTR x = (pEXTR) (old + symoff + i);
+ char *s;
+
+ s = old + stroff + x->asym.iss; /* name of the symbol */
+
+ if (!strcmp(s,"_edata"))
+ {
+ found++;
+ bcopy (x, &n_edata, cbEXTR);
+ n_edata.asym.value = Brk;
+ SEEK (new, newsyms + cbHDRR + i,
+ "seeking to symbol _edata in %s", new_name);
+ WRITE (new, n_edata, cbEXTR,
+ "writing symbol table entry for _edata into %s", new_name);
+ }
+ else if (!strcmp(s,"_end"))
+ {
+ found++;
+ bcopy (x, &n_end, cbEXTR);
+ n_end.asym.value = Brk;
+ SEEK (new, newsyms + cbHDRR + i,
+ "seeking to symbol _end in %s", new_name);
+ WRITE (new, n_end, cbEXTR,
+ "writing symbol table entry for _end into %s", new_name);
+ }
+ }
+
+}
+
+#endif
+
+\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 / emacs.git / commitdiff