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Retro68/elf2flt/flthdr.c
Wolfgang Thaller 023d88e105 add elf2flt from CVS
2012-03-27 23:31:44 +02:00

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/****************************************************************************/
/*
* A simple program to manipulate flat files
*
* Copyright (C) 2001-2003 SnapGear Inc, davidm@snapgear.com
* Copyright (C) 2001 Lineo, davidm@lineo.com
*
* This is Free Software, under the GNU Public Licence v2 or greater.
*
*/
/****************************************************************************/
#include <stdio.h> /* Userland pieces of the ANSI C standard I/O package */
#include <unistd.h> /* Userland prototypes of the Unix std system calls */
#include <time.h>
#include <stdlib.h> /* exit() */
#include <string.h> /* strcat(), strcpy() */
#include <inttypes.h>
#include <assert.h>
#include "compress.h"
#include <libiberty.h>
#include "stubs.h"
const char *elf2flt_progname;
/* from uClinux-x.x.x/include/linux */
#include "flat.h" /* Binary flat header description */
#if defined(__MINGW32__)
#include <getopt.h>
#define mkstemp(p) mktemp(p)
#endif
#if defined TARGET_bfin
# define flat_get_relocate_addr(addr) (addr & 0x03ffffff)
#else
# define flat_get_relocate_addr(addr) (addr)
#endif
/****************************************************************************/
static int print = 0, print_relocs = 0, docompress = 0, ramload = 0,
stacksize = 0, ktrace = 0, l1stack = 0;
/****************************************************************************/
void
process_file(char *ifile, char *ofile)
{
int old_flags, old_stack, new_flags, new_stack;
stream ifp, ofp;
struct flat_hdr old_hdr, new_hdr;
char *tfile, tmpbuf[256];
int input_error, output_error;
*tmpbuf = '\0';
if (fopen_stream_u(&ifp, ifile, "r" BINARY_FILE_OPTS)) {
fprintf(stderr, "Cannot open %s\n", ifile);
return;
}
if (fread_stream(&old_hdr, sizeof(old_hdr), 1, &ifp) != 1) {
fprintf(stderr, "Cannot read header of %s\n", ifile);
fclose_stream(&ifp);
return;
}
if (strncmp(old_hdr.magic, "bFLT", 4) != 0) {
fprintf(stderr, "Cannot read header of %s\n", ifile);
fclose_stream(&ifp);
return;
}
new_flags = old_flags = ntohl(old_hdr.flags);
new_stack = old_stack = ntohl(old_hdr.stack_size);
new_hdr = old_hdr;
if (docompress == 1) {
new_flags |= FLAT_FLAG_GZIP;
new_flags &= ~FLAT_FLAG_GZDATA;
} else if (docompress == 2) {
new_flags |= FLAT_FLAG_GZDATA;
new_flags &= ~FLAT_FLAG_GZIP;
} else if (docompress < 0)
new_flags &= ~(FLAT_FLAG_GZIP|FLAT_FLAG_GZDATA);
if (ramload > 0)
new_flags |= FLAT_FLAG_RAM;
else if (ramload < 0)
new_flags &= ~FLAT_FLAG_RAM;
if (ktrace > 0)
new_flags |= FLAT_FLAG_KTRACE;
else if (ktrace < 0)
new_flags &= ~FLAT_FLAG_KTRACE;
if (l1stack > 0)
new_flags |= FLAT_FLAG_L1STK;
else if (l1stack < 0)
new_flags &= ~FLAT_FLAG_L1STK;
if (stacksize)
new_stack = stacksize;
if (print == 1) {
time_t t;
uint32_t reloc_count, reloc_start;
printf("%s\n", ifile);
printf(" Magic: %4.4s\n", old_hdr.magic);
printf(" Rev: %d\n", ntohl(old_hdr.rev));
t = (time_t) htonl(old_hdr.build_date);
printf(" Build Date: %s", t?ctime(&t):"not specified\n");
printf(" Entry: 0x%x\n", ntohl(old_hdr.entry));
printf(" Data Start: 0x%x\n", ntohl(old_hdr.data_start));
printf(" Data End: 0x%x\n", ntohl(old_hdr.data_end));
printf(" BSS End: 0x%x\n", ntohl(old_hdr.bss_end));
printf(" Stack Size: 0x%x\n", ntohl(old_hdr.stack_size));
reloc_start = ntohl(old_hdr.reloc_start);
printf(" Reloc Start: 0x%x\n", reloc_start);
reloc_count = ntohl(old_hdr.reloc_count);
printf(" Reloc Count: 0x%x\n", reloc_count);
printf(" Flags: 0x%x ( ", ntohl(old_hdr.flags));
if (old_flags) {
if (old_flags & FLAT_FLAG_RAM)
printf("Load-to-Ram ");
if (old_flags & FLAT_FLAG_GOTPIC)
printf("Has-PIC-GOT ");
if (old_flags & FLAT_FLAG_GZIP)
printf("Gzip-Compressed ");
if (old_flags & FLAT_FLAG_GZDATA)
printf("Gzip-Data-Compressed ");
if (old_flags & FLAT_FLAG_KTRACE)
printf("Kernel-Traced-Load ");
if (old_flags & FLAT_FLAG_L1STK)
printf("L1-Scratch-Stack ");
printf(")\n");
}
if (print_relocs) {
uint32_t *relocs = xcalloc(reloc_count, sizeof(uint32_t));
uint32_t i;
unsigned long r;
printf(" Relocs:\n");
printf(" #\treloc ( address )\tdata\n");
if (old_flags & FLAT_FLAG_GZIP)
reopen_stream_compressed(&ifp);
if (fseek_stream(&ifp, reloc_start, SEEK_SET)) {
fprintf(stderr, "Cannot seek to relocs of %s\n", ifile);
fclose_stream(&ifp);
return;
}
if (fread_stream(relocs, sizeof(uint32_t), reloc_count, &ifp) == -1) {
fprintf(stderr, "Cannot read relocs of %s\n", ifile);
fclose_stream(&ifp);
return;
}
for (i = 0; i < reloc_count; ++i) {
uint32_t raddr, addr;
r = ntohl(relocs[i]);
raddr = flat_get_relocate_addr(r);
printf(" %u\t0x%08lx (0x%08"PRIx32")\t", i, r, raddr);
fseek_stream(&ifp, sizeof(old_hdr) + raddr, SEEK_SET);
fread_stream(&addr, sizeof(addr), 1, &ifp);
printf("%"PRIx32"\n", addr);
}
/* reset file position for below */
fseek_stream(&ifp, sizeof(old_hdr), SEEK_SET);
}
} else if (print > 1) {
static int first = 1;
unsigned int text, data, bss, stk, rel, tot;
if (first) {
printf("Flag Rev Text Data BSS Stack Relocs RAM Filename\n");
printf("-----------------------------------------------------------\n");
first = 0;
}
*tmpbuf = '\0';
strcat(tmpbuf, (old_flags & FLAT_FLAG_KTRACE) ? "k" : "");
strcat(tmpbuf, (old_flags & FLAT_FLAG_RAM) ? "r" : "");
strcat(tmpbuf, (old_flags & FLAT_FLAG_GOTPIC) ? "p" : "");
strcat(tmpbuf, (old_flags & FLAT_FLAG_GZIP) ? "z" :
((old_flags & FLAT_FLAG_GZDATA) ? "d" : ""));
printf("-%-3.3s ", tmpbuf);
printf("%3d ", ntohl(old_hdr.rev));
printf("%6d ", text=ntohl(old_hdr.data_start)-sizeof(struct flat_hdr));
printf("%6d ", data=ntohl(old_hdr.data_end)-ntohl(old_hdr.data_start));
printf("%6d ", bss=ntohl(old_hdr.bss_end)-ntohl(old_hdr.data_end));
printf("%6d ", stk=ntohl(old_hdr.stack_size));
printf("%6d ", rel=ntohl(old_hdr.reloc_count) * 4);
/*
* work out how much RAM is needed per invocation, this
* calculation is dependent on the binfmt_flat implementation
*/
tot = data; /* always need data */
if (old_flags & (FLAT_FLAG_RAM|FLAT_FLAG_GZIP))
tot += text + sizeof(struct flat_hdr);
if (bss + stk > rel) /* which is bigger ? */
tot += bss + stk;
else
tot += rel;
printf("%6d ", tot);
/*
* the total depends on whether the relocs are smaller/bigger than
* the BSS
*/
printf("%s\n", ifile);
}
/* if there is nothing else to do, leave */
if (new_flags == old_flags && new_stack == old_stack) {
fclose_stream(&ifp);
return;
}
new_hdr.flags = htonl(new_flags);
new_hdr.stack_size = htonl(new_stack);
tfile = make_temp_file("flthdr");
if (fopen_stream_u(&ofp, tfile, "w" BINARY_FILE_OPTS)) {
unlink(tfile);
fatal("Failed to open %s for writing\n", tfile);
}
/* Copy header (always uncompressed). */
if (fwrite_stream(&new_hdr, sizeof(new_hdr), 1, &ofp) != 1) {
unlink(tfile);
fatal("Failed to write to %s\n", tfile);
}
/* Whole input file (including text) is compressed: start decompressing
now. */
if (old_flags & FLAT_FLAG_GZIP)
reopen_stream_compressed(&ifp);
/* Likewise, output file is compressed. Start compressing now. */
if (new_flags & FLAT_FLAG_GZIP) {
printf("zflat %s --> %s\n", ifile, ofile);
reopen_stream_compressed(&ofp);
}
transfer(&ifp, &ofp,
ntohl(old_hdr.data_start) - sizeof(struct flat_hdr));
/* Only data and relocs were compressed in input. Start decompressing
from here. */
if (old_flags & FLAT_FLAG_GZDATA)
reopen_stream_compressed(&ifp);
/* Only data/relocs to be compressed in output. Start compressing
from here. */
if (new_flags & FLAT_FLAG_GZDATA) {
printf("zflat-data %s --> %s\n", ifile, ofile);
reopen_stream_compressed(&ofp);
}
transfer(&ifp, &ofp, -1);
input_error = ferror_stream(&ifp);
output_error = ferror_stream(&ofp);
if (input_error || output_error) {
unlink(tfile);
fatal("Error on file pointer%s%s\n",
input_error ? " input" : "",
output_error ? " output" : "");
}
fclose_stream(&ifp);
fclose_stream(&ofp);
/* Copy temporary file to output location. */
fopen_stream_u(&ifp, tfile, "r" BINARY_FILE_OPTS);
fopen_stream_u(&ofp, ofile, "w" BINARY_FILE_OPTS);
transfer(&ifp, &ofp, -1);
fclose_stream(&ifp);
fclose_stream(&ofp);
unlink(tfile);
free(tfile);
}
/****************************************************************************/
void
usage(char *s)
{
if (s)
fprintf(stderr, "%s\n", s);
fprintf(stderr, "usage: %s [options] flat-file\n", elf2flt_progname);
fprintf(stderr, " Allows you to change an existing flat file\n\n");
fprintf(stderr, " -p : print current settings\n");
fprintf(stderr, " -P : print relocations\n");
fprintf(stderr, " -z : compressed flat file\n");
fprintf(stderr, " -d : compressed data-only flat file\n");
fprintf(stderr, " -Z : un-compressed flat file\n");
fprintf(stderr, " -r : ram load\n");
fprintf(stderr, " -R : do not RAM load\n");
fprintf(stderr, " -k : kernel traced load (for debug)\n");
fprintf(stderr, " -K : normal non-kernel traced load\n");
fprintf(stderr, " -u : place stack in L1 scratchpad memory\n");
fprintf(stderr, " -U : place stack in normal SDRAM memory\n");
fprintf(stderr, " -s size : stack size\n");
fprintf(stderr, " -o file : output-file\n"
" (default is to modify input file)\n");
exit(1);
}
/****************************************************************************/
int
main(int argc, char *argv[])
{
int c, noargs;
char *ofile = NULL, *ifile;
elf2flt_progname = argv[0];
noargs = 1;
while ((c = getopt(argc, argv, "pPdzZrRuUkKs:o:")) != EOF) {
switch (c) {
case 'p': print = 1; break;
case 'P': print_relocs = 1; break;
case 'z': docompress = 1; break;
case 'd': docompress = 2; break;
case 'Z': docompress = -1; break;
case 'r': ramload = 1; break;
case 'R': ramload = -1; break;
case 'k': ktrace = 1; break;
case 'K': ktrace = -1; break;
case 'u': l1stack = 1; break;
case 'U': l1stack = -1; break;
case 'o': ofile = optarg; break;
case 's':
if (sscanf(optarg, "%i", &stacksize) != 1)
usage("invalid stack size");
break;
default:
usage("invalid option");
break;
}
noargs = 0;
}
if (optind >= argc)
usage("No input files provided");
if (ofile && argc - optind > 1)
usage("-o can only be used with a single file");
if (!print && noargs) /* no args == print */
print = argc - optind; /* greater than 1 is short format */
for (c = optind; c < argc; c++) {
ifile = argv[c];
if (!ofile)
ofile = ifile;
process_file(ifile, ofile);
ofile = NULL;
}
exit(0);
}
/****************************************************************************/
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