Commit b061d5f1 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

Initial revision

parent ce99fd65
/* 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
/* 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. */
#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
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
/*
* 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);
}
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