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elk/src/dump-vanilla.c

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/* dump-vanilla.c
*
* $Id$
*
* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
* Copyright 2002, 2003 Sam Hocevar <sam@zoy.org>, Paris
*
* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
* between TELES and Nixdorf Microprocessor Engineering, Berlin).
*
* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
* owners or individual owners of copyright in this software, grant to any
* person or company a worldwide, royalty free, license to
*
* i) copy this software,
* ii) prepare derivative works based on this software,
* iii) distribute copies of this software or derivative works,
* iv) perform this software, or
* v) display this software,
*
* provided that this notice is not removed and that neither Oliver Laumann
* nor Teles nor Nixdorf are deemed to have made any representations as to
* the suitability of this software for any purpose nor are held responsible
* for any defects of this software.
*
* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
*/
#ifdef COFF
# include <filehdr.h>
# include <aouthdr.h>
# include <scnhdr.h>
# include <syms.h>
# ifndef N_BADMAG
# define N_BADMAG(x) (0)
# endif
#else
# include AOUT_H
#endif
extern void *sbrk();
#if defined(hp9000s300) || defined(__hp9000s300) || defined(__hp9000s300__)
static int getpagesize () {
return EXEC_PAGESIZE;
}
#endif
Object P_Dump (Object ofile) {
#ifdef COFF
static struct scnhdr thdr, dhdr, bhdr, scn;
static struct filehdr hdr;
static struct aouthdr ohdr;
unsigned int bias;
unsigned int lnno_start, syms_start;
unsigned int text_scn_start, data_scn_start;
unsigned int data_end;
int pagemask = COFF_PAGESIZE-1;
#else
struct exec hdr, shdr;
unsigned int data_start, data_end;
int pagemask = getpagesize () - 1;
#endif
char *afn;
register int n;
char buf[BUFSIZ];
Dump_Prolog;
if (read (afd, (char *)&hdr, sizeof (hdr)) != sizeof (hdr)
|| N_BADMAG(hdr)) {
#ifdef COFF
badaout:
#endif
Dump_Finalize;
Primitive_Error ("corrupt a.out file");
}
#ifdef COFF
data_end = ((unsigned int)sbrk (0) + pagemask) & ~pagemask;
syms_start = sizeof (hdr);
if (hdr.f_opthdr > 0) {
if (read (afd, (char *)&ohdr, sizeof (ohdr)) != sizeof (ohdr))
goto badaout;
}
for (n = 0; n < hdr.f_nscns; n++) {
if (read (afd, (char *)&scn, sizeof (scn)) != sizeof (scn))
goto badaout;
if (scn.s_scnptr > 0 && syms_start < scn.s_scnptr + scn.s_size)
syms_start = scn.s_scnptr + scn.s_size;
if (strcmp (scn.s_name, ".text") == 0)
thdr = scn;
else if (strcmp (scn.s_name, ".data") == 0)
dhdr = scn;
else if (strcmp (scn.s_name, ".bss") == 0)
bhdr = scn;
}
hdr.f_flags |= (F_RELFLG|F_EXEC);
ohdr.dsize = data_end - ohdr.data_start;
ohdr.bsize = 0;
thdr.s_size = ohdr.tsize;
thdr.s_scnptr = sizeof (hdr) + sizeof (ohdr)
+ hdr.f_nscns * sizeof (thdr);
lnno_start = thdr.s_lnnoptr;
text_scn_start = thdr.s_scnptr;
dhdr.s_paddr = dhdr.s_vaddr = ohdr.data_start;
dhdr.s_size = ohdr.dsize;
dhdr.s_scnptr = thdr.s_scnptr + thdr.s_size;
data_scn_start = dhdr.s_scnptr;
bhdr.s_paddr = bhdr.s_vaddr = ohdr.data_start + ohdr.dsize;
bhdr.s_size = ohdr.bsize;
bhdr.s_scnptr = 0;
bias = dhdr.s_scnptr + dhdr.s_size - syms_start;
if (hdr.f_symptr > 0)
hdr.f_symptr += bias;
if (thdr.s_lnnoptr > 0)
thdr.s_lnnoptr += bias;
if (write (ofd, (char *)&hdr, sizeof (hdr)) != sizeof (hdr)) {
badwrite:
Dump_Finalize;
Primitive_Error ("error writing dump file: ~E");
}
if (write (ofd, (char *)&ohdr, sizeof (ohdr)) != sizeof (ohdr))
goto badwrite;
if (write (ofd, (char *)&thdr, sizeof (thdr)) != sizeof (thdr))
goto badwrite;
if (write (ofd, (char *)&dhdr, sizeof (dhdr)) != sizeof (dhdr))
goto badwrite;
if (write (ofd, (char *)&bhdr, sizeof (bhdr)) != sizeof (bhdr))
goto badwrite;
lseek (ofd, (off_t)text_scn_start, 0);
if (write (ofd, (char *)ohdr.text_start, ohdr.tsize) != ohdr.tsize)
goto badwrite;
Was_Dumped = 1;
lseek (ofd, (off_t)data_scn_start, 0);
if (write (ofd, (char *)ohdr.data_start, ohdr.dsize) != ohdr.dsize)
goto badwrite;
lseek (afd, lnno_start ? (off_t)lnno_start : (off_t)syms_start, 0);
#else
close (afd);
#if defined(__bsdi__)
data_start = N_DATADDR(hdr);
#else
data_start = hdr.a_text;
#if defined(sun) || defined(__sun__)
data_start += pagemask+1;
#endif
data_start = (data_start + SEG_SIZ-1) & ~(SEG_SIZ-1);
#endif
data_end = (unsigned int)sbrk (0);
#if !defined(__bsdi__)
data_end = (data_end + pagemask) & ~pagemask;
#endif
hdr.a_data = data_end - data_start;
hdr.a_bss = 0;
hdr.a_trsize = hdr.a_drsize = 0;
afn = Loader_Input;
if (!afn)
afn = A_Out_Name;
if ((afd = open (afn, O_RDONLY|O_BINARY)) == -1) {
Dump_Finalize;
Primitive_Error ("cannot open symbol table file: ~E");
}
if (read (afd, (char *)&shdr, sizeof (shdr)) != sizeof (shdr)
|| N_BADMAG(shdr)) {
Dump_Finalize;
Primitive_Error ("corrupt symbol table file");
}
#if defined(hp9000s300) || defined(__hp9000s300) || defined(__hp9000s300__)
hdr.a_lesyms = shdr.a_lesyms;
#else
hdr.a_syms = shdr.a_syms;
#endif
(void)lseek (ofd, (off_t)FILE_TEXT_START, 0);
n = hdr.a_text - TEXT_LENGTH_ADJ;
if (write (ofd, (char *)MEM_TEXT_START, n) != n) {
badwrite:
Dump_Finalize;
Primitive_Error ("error writing dump file: ~E");
}
Was_Dumped = 1;
#if defined(hp9000s300) || defined(__hp9000s300) || defined(__hp9000s300__)
(void)lseek (ofd, (off_t)DATA_OFFSET(hdr), 0);
#endif
#if defined(__bsdi__)
(void)lseek (ofd, (off_t)N_DATOFF(hdr), 0);
#endif
#ifdef GENERATIONAL_GC
n = data_end - data_start;
if (write (ofd, (char *)data_start, n) != n)
goto badwrite;
#else
if (Heap_Start > Free_Start) {
n = (unsigned int)Free_Start - data_start;
if (write (ofd, (char *)data_start, n) != n)
goto badwrite;
(void)lseek (ofd, (off_t)(Free_End - Free_Start), 1);
n = Hp - Heap_Start;
if (write (ofd, Heap_Start, n) != n)
goto badwrite;
(void)lseek (ofd, (off_t)(Heap_End - Hp), 1);
n = data_end - (unsigned int)Heap_End;
if (write (ofd, Heap_End, n) != n)
goto badwrite;
} else {
n = (unsigned int)Hp - data_start;
if (write (ofd, (char *)data_start, n) != n)
goto badwrite;
(void)lseek (ofd, (off_t)(Free_End - Hp), 1);
n = data_end - (unsigned int)Free_End;
if (write (ofd, Free_End, n) != n)
goto badwrite;
}
#endif
#if defined(hp9000s300) || defined(__hp9000s300) || defined(__hp9000s300__)
(void)lseek (afd, (off_t)LESYM_OFFSET(shdr), 0);
(void)lseek (ofd, (off_t)LESYM_OFFSET(hdr), 0);
#else
(void)lseek (afd, (off_t)N_SYMOFF(shdr), 0);
#if defined(__bsdi__)
(void)lseek (ofd, (off_t)N_SYMOFF(hdr), 0);
#endif
#endif
#endif /* !COFF */
while ((n = read (afd, buf, BUFSIZ)) > 0) {
if (write (ofd, buf, n) != n)
goto badwrite;
}
if (n < 0) {
Dump_Finalize;
Primitive_Error ("error reading symbol table: ~E");
}
#if !defined(COFF)
(void)lseek (ofd, (off_t)0L, 0);
if (write (ofd, (char *)&hdr, sizeof (hdr)) != sizeof (hdr))
goto badwrite;
#endif
Dump_Epilog;
}
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