boundary is needed, define SEGMENT_MASK to a mask of
the bits that must be zero on such a boundary.
-* A_TEXT_OFFSET(HDR)
-
-Some machines count the a.out header as part of the size of the text
-segment (a_text); they may actually load the header into core as the
-first data in the text segment. Some have additional padding between
-the header and the real text of the program that is counted in a_text.
-
-For these machines, define A_TEXT_OFFSET(HDR) to examine the header
-structure HDR and return the number of bytes to add to `a_text'
-before writing it (above and beyond the number of bytes of actual
-program text). HDR's standard fields are already correct, except that
-this adjustment to the `a_text' field has not yet been made;
-thus, the amount of offset can depend on the data in the file.
-
-* A_TEXT_SEEK(HDR)
-
-If defined, this macro specifies the number of bytes to seek into the
-a.out file before starting to write the text segment.
-
* ADJUST_EXEC_HEADER
This macro can be used to generate statements to adjust or
#ifndef CANNOT_DUMP /* all rest of file! */
-#if defined(COFF) && defined(HAVE_COFF_H)
+#ifdef HAVE_COFF_H
#include <coff.h>
#ifdef MSDOS
#if __DJGPP__ > 1
unsigned long data_start;/* base of data used for this file */
};
#endif /* not MSDOS */
-#else /* not COFF */
+#else /* not HAVE_COFF_H */
#include <a.out.h>
-#endif /* not COFF */
+#endif /* not HAVE_COFF_H */
/* Define getpagesize if the system does not.
Note that this may depend on symbols defined in a.out.h. */
#include <sys/stat.h>
#include <errno.h>
-#include <sys/file.h> /* Must be after sys/types.h for USG*/
-
-#ifdef USG5
-#include <fcntl.h>
-#endif
+#include <sys/file.h>
#ifndef O_RDONLY
#define O_RDONLY 0
extern char *start_of_text (); /* Start of text */
extern char *start_of_data (); /* Start of initialized data */
-#ifdef COFF
static long block_copy_start; /* Old executable start point */
static struct filehdr f_hdr; /* File header */
static struct aouthdr f_ohdr; /* Optional file header (a.out) */
static long coff_offset;
-#else /* not COFF */
-
-extern char *sbrk ();
-
-#define SYMS_START ((long) N_SYMOFF (ohdr))
-
-#if defined (USG)
-static struct bhdr hdr, ohdr;
-#define a_magic fmagic
-#define a_text tsize
-#define a_data dsize
-#define a_bss bsize
-#define a_syms ssize
-#define a_trsize rtsize
-#define a_drsize rdsize
-#define a_entry entry
-#define N_BADMAG(x) \
- (((x).fmagic)!=OMAGIC && ((x).fmagic)!=NMAGIC &&\
- ((x).fmagic)!=FMAGIC && ((x).fmagic)!=IMAGIC)
-#define NEWMAGIC FMAGIC
-#else /* not USG */
-static struct exec hdr, ohdr;
-#define NEWMAGIC ZMAGIC
-#endif /* not USG */
-
-static int unexec_text_start;
-static int unexec_data_start;
-
-#endif /* not COFF */
-
static int pagemask;
/* Correct an int which is the bit pattern of a pointer to a byte
char *new_name;
{
int tem;
-#ifdef COFF
auto struct scnhdr f_thdr; /* Text section header */
auto struct scnhdr f_dhdr; /* Data section header */
auto struct scnhdr f_bhdr; /* Bss section header */
auto struct scnhdr scntemp; /* Temporary section header */
register int scns;
-#endif /* COFF */
unsigned int bss_end;
pagemask = getpagesize () - 1;
data_start, bss_start);
}
-#ifdef COFF
coff_offset = 0L; /* stays zero, except in DJGPP */
/* Salvage as much info from the existing file as possible */
return (0);
-#else /* if not COFF */
-
- /* Get symbol table info from header of a.out file if given one. */
- if (a_out >= 0)
- {
- if (read (a_out, &ohdr, sizeof hdr) != sizeof hdr)
- {
- PERROR (a_name);
- }
-
- if (N_BADMAG (ohdr))
- {
- ERROR1 ("invalid magic number in %s", a_name);
- }
- hdr = ohdr;
- }
- else
- {
-#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
- bzero ((void *)&hdr, sizeof hdr);
-#else
- bzero (&hdr, sizeof hdr);
-#endif
- }
-
- unexec_text_start = (long) start_of_text ();
- unexec_data_start = data_start;
-
- /* Machine-dependent fixup for header, or maybe for unexec_text_start */
-#ifdef ADJUST_EXEC_HEADER
- ADJUST_EXEC_HEADER;
-#endif /* ADJUST_EXEC_HEADER */
-
- hdr.a_trsize = 0;
- hdr.a_drsize = 0;
- if (entry_address != 0)
- hdr.a_entry = entry_address;
-
- hdr.a_bss = bss_end - bss_start;
- hdr.a_data = bss_start - data_start;
-#ifdef NO_REMAP
- hdr.a_text = ohdr.a_text;
-#else /* not NO_REMAP */
- hdr.a_text = data_start - unexec_text_start;
-
-#ifdef A_TEXT_OFFSET
- hdr.a_text += A_TEXT_OFFSET (ohdr);
-#endif
-
-#endif /* not NO_REMAP */
-
- if (write (new, &hdr, sizeof hdr) != sizeof hdr)
- {
- PERROR (new_name);
- }
-
-#ifdef A_TEXT_OFFSET
- hdr.a_text -= A_TEXT_OFFSET (ohdr);
-#endif
-
- return 0;
-
-#endif /* not COFF */
}
\f
write_segment (new, ptr, end)
register char *end;
register char *ptr;
-#ifdef COFF
-
#ifdef MSDOS
#if __DJGPP__ >= 2
/* Dump the original table of exception handlers, not the one
#endif
#endif
-#else /* if not COFF */
-
-/* Some machines count the header as part of the text segment.
- That is to say, the header appears in core
- just before the address that start_of_text returns.
- For them, N_TXTOFF is the place where the header goes.
- We must adjust the seek to the place after the header.
- Note that at this point hdr.a_text does *not* count
- the extra A_TEXT_OFFSET bytes, only the actual bytes of code. */
-
-#ifdef A_TEXT_SEEK
- lseek (new, (long) A_TEXT_SEEK (hdr), 0);
-#else
- lseek (new, (long) N_TXTOFF (hdr), 0);
-#endif /* no A_TEXT_SEEK */
-
- ptr = (char *) unexec_text_start;
- end = ptr + hdr.a_text;
- write_segment (new, ptr, end);
-
- ptr = (char *) unexec_data_start;
- end = ptr + hdr.a_data;
-/* This lseek is certainly incorrect when A_TEXT_OFFSET
- and I believe it is a no-op otherwise.
- Let's see if its absence ever fails. */
-/* lseek (new, (long) N_TXTOFF (hdr) + hdr.a_text, 0); */
- write_segment (new, ptr, end);
-
-#endif /* not COFF */
return 0;
}
if (a_out < 0)
return 0;
-#ifdef COFF
if (SYMS_START == 0L)
return 0;
-#endif /* COFF */
-#ifdef COFF
if (lnnoptr) /* if there is line number info */
lseek (a_out, coff_offset + lnnoptr, 0); /* start copying from there */
else
lseek (a_out, coff_offset + SYMS_START, 0); /* Position a.out to symtab. */
-#else /* not COFF */
- lseek (a_out, SYMS_START, 0); /* Position a.out to symtab. */
-#endif /* not COFF */
while ((n = read (a_out, page, sizeof page)) > 0)
{
PERROR (name);
}
\f
-#ifdef COFF
#ifndef COFF_BSD_SYMBOLS
/*
#endif /* COFF_BSD_SYMBOLS */
-#endif /* COFF */
-
/* ****************************************************************
* unexec
*
if (make_hdr (new, a_out, data_start, bss_start, entry_address, a_name, new_name) < 0
|| copy_text_and_data (new, a_out) < 0
|| copy_sym (new, a_out, a_name, new_name) < 0
-#ifdef COFF
#ifndef COFF_BSD_SYMBOLS
|| adjust_lnnoptrs (new, a_out, new_name) < 0
-#endif
#endif
)
{
projects / emacs.git / commitdiff