123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325 |
- /*
- * Simple tool to produce a memory dump for an absolute
- * ack.out file. Suitable for noddy operating systems
- * like DOS, CP/M, Arthur, etc. Also useful for RAM
- * images (but *not* ROM images, note) and, more
- * importantly, general test purposes.
- *
- * Mostly pinched from the ARM cv (and then rewritten in
- * ANSI C). Which, according to the comment, was pinched
- * from m68k2; therefore I am merely continuing a time-
- * honoured tradition.
- *
- * (I was 10 when the original for this was checked into
- * CVS...)
- *
- * dtrg, 2006-10-17
- *
- * $Source$
- * $State$
- */
- #include <stdlib.h>
- #include <stdio.h>
- #include <stdarg.h>
- #include <string.h>
- #include "out.h"
- #define ASSERT(x) switch (2) { case 0: case (x): ; }
- /*
- * Header and section table of ack object file.
- */
-
- struct outhead outhead;
- struct outsect outsect[S_MAX];
- char* stringarea;
- char* outputfile = NULL; /* Name of output file, or NULL */
- char* program; /* Name of current program: argv[0] */
- FILE* input; /* Input stream */
- FILE* output; /* Output stream */
- #define readf(a, b, c) fread((a), (b), (int)(c), input)
- #define writef(a, b, c) fwrite((a), (b), (int)(c), output)
- /* Output file definitions and such */
- #define HDR_LENGTH 32
- char hdr[HDR_LENGTH] ;
- /* Segment numbers understood by aslod. */
- enum {
- TEXT = 0,
- ROM,
- DATA,
- BSS,
- NUM_SEGMENTS
- };
- #define N_EXT 040
- #define N_UNDEF 00
- #define N_ABS 01
- #define N_TEXT 02
- #define N_DATA 03
- #define N_BSS 04
- #define N_FN 037
- /* Produce an error message and exit. */
- void fatal(const char* s, ...)
- {
- va_list ap;
-
- fprintf(stderr, "%s: ",program) ;
-
- va_start(ap, s);
- vfprintf(stderr, s, ap);
- va_end(ap);
-
- fprintf(stderr, "\n");
-
- if (outputfile)
- unlink(outputfile);
- exit(1);
- }
- /* Calculate the result of a aligned to b (rounding up if necessary). */
- long align(long a, long b)
- {
- a += b - 1;
- return a - a % b;
- }
-
- int follows(struct outsect* pa, struct outsect* pb)
- {
- /* return 1 if pa follows pb */
-
- return (pa->os_base == align(pb->os_base+pb->os_size, pa->os_lign));
- }
- /* Copies the contents of a section from the input stream
- * to the output stream, zero filling any uninitialised
- * space. */
-
- void emits(struct outsect* section)
- {
- char buffer[BUFSIZ];
- /* Copy the actual data. */
-
- {
- long n = section->os_flen;
- while (n > 0)
- {
- int blocksize = (n > BUFSIZ) ? BUFSIZ : n;
- readf(buffer, 1, blocksize);
- writef(buffer, 1, blocksize);
- n -= blocksize;
- }
- }
-
- /* Zero fill any remaining space. */
-
- if (section->os_flen != section->os_size)
- {
- long n = section->os_size - section->os_flen;
- memset(buffer, 0, BUFSIZ);
- while (n > 0)
- {
- int blocksize = (n > BUFSIZ) ? BUFSIZ : n;
- writef(buffer, 1, blocksize);
- n -= blocksize;
- }
- }
- }
- void iconvert(char* buf, char* str, char* fmt)
- {
- register char *nf, *ni, *no ;
- int last, i ;
- long value ;
- ni=buf ; no=str ; nf=fmt ;
- while ( last = *nf++ ) {
- last -= '0' ;
- if ( last<1 || last >9 ) fatal("illegal out.h format string\n");
- value=0 ;
- i=last ;
- while ( i-- ) {
- value = (value<<8) + (ni[i]&0xFF) ;
- }
- switch ( last ) {
- case 0 : break ;
- case 1 : *no= value ; break ;
- case 2 : *(unsigned short *)no = value ; break ;
- case 4 : *(long *)no = value ; break ;
- default :
- fatal("illegal out.h format string\n");
- }
- ni += last ; no += last ;
- }
- }
- /* Read the ack.out file header. */
- int rhead(FILE* f, struct outhead* head)
- {
- char buf[sizeof(struct outhead)];
-
- if (fread(buf, sizeof(buf), 1, f) != 1)
- return 0;
-
- iconvert(buf, (char*) head, SF_HEAD);
- return 1;
- }
- /* Read an ack.out section header. */
-
- int rsect(FILE* f, struct outsect* sect)
- {
- char buf[sizeof(struct outsect)];
-
- if (fread(buf, sizeof(buf), 1, f) != 1)
- return 0;
-
- iconvert(buf, (char*) sect, SF_SECT);
- return 1 ;
- }
- int main(int argc, char* argv[])
- {
- /* General housecleaning and setup. */
-
- input = stdin;
- output = stdout;
- program = argv[0];
-
- /* Read in and process any flags. */
-
- while ((argc > 1) && (argv[1][0] == '-'))
- {
- switch (argv[1][1])
- {
- case 'h':
- fprintf(stderr, "%s: Syntax: aslod [-h] <inputfile> <outputfile>\n",
- program);
- exit(0);
-
- default:
- syntaxerror:
- fatal("syntax error --- try -h for help)");
- }
-
- argv++;
- argc--;
- }
- /* Process the rest of the arguments. */
-
- switch (argc)
- {
- case 1: /* No parameters --- read from stdin, write to stdout. */
- break;
-
- case 3: /* Both input and output files specified. */
- output = fopen(argv[2], "w");
- if (!output)
- fatal("unable to open output file.");
- outputfile = argv[2];
- /* fall through */
-
- case 2: /* Input file specified. */
- input = fopen(argv[1], "r");
- if (!input)
- fatal("unable to open input file.");
- break;
-
- default:
- goto syntaxerror;
- }
- /* Read and check the ack.out file header. */
-
- if (!rhead(input,&outhead))
- fatal("failed to read file header.");
- if (BADMAGIC(outhead))
- fatal("this isn't an ack object file.");
- if (outhead.oh_nrelo > 0)
- fprintf(stderr, "Warning: relocation information present.");
- if (!((outhead.oh_nsect == NUM_SEGMENTS) ||
- (outhead.oh_nsect == (NUM_SEGMENTS+1))))
- fatal("the input file must have %d sections, not %ld.",
- NUM_SEGMENTS, outhead.oh_nsect);
-
- /* Read in the section headers. */
-
- {
- int i;
- for (i=0; i<outhead.oh_nsect; i++)
- {
- if (!rsect(input, &outsect[i]))
- fatal("failed to read section header %d.", i);
- }
- }
- /* A few checks */
- if (outsect[BSS].os_flen != 0)
- fatal("the bss space contains initialized data.");
- if (!follows(&outsect[BSS], &outsect[DATA]))
- fatal("the bss segment must follow the data segment.");
- if (!follows(& outsect[ROM], &outsect[TEXT]))
- fatal("the rom segment must follow the text segment.");
- if (!follows(&outsect[DATA], &outsect[ROM]))
- fatal("the data segment must follow the rom segment.") ;
- /* Check for an optional end segment (which is otherwise
- * ignored). */
-
- if (outhead.oh_nsect == (NUM_SEGMENTS+1))
- {
- if (!follows(&outsect[NUM_SEGMENTS], &outsect[BSS]))
- fatal("end segment must follow bss");
- if ( outsect[NUM_SEGMENTS].os_size != 0 )
- fatal("end segment must be empty");
- }
- /* And go! */
-
- emits(&outsect[TEXT]);
- emits(&outsect[ROM]);
- emits(&outsect[DATA]);
- if (ferror(output))
- fatal("output write error");
- if (outputfile)
- chmod(outputfile, 0755);
- /* Summarise what we've done. */
-
- {
- long ss = 0;
- printf(" base : %08lX\n", outsect[TEXT].os_base) ;
- printf(" text = %08lX\n", outsect[TEXT].os_size);
- printf(" rom = %08lX\n", outsect[ROM].os_size);
- printf(" data = %08lX\n", outsect[DATA].os_size);
- printf(" bss = %08lX\n", outsect[BSS].os_size);
- ss += outsect[TEXT].os_size;
- ss += outsect[ROM].os_size;
- ss += outsect[DATA].os_size;
- ss += outsect[BSS].os_size;
- printf("TOTAL = %08lX\n", ss);
- }
-
- return 0;
- }
|