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More robust detection of file transfer/conversion errors in ROM/boot code

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This commit is contained in:
Mark Pizzolato
2012-02-26 12:38:07 -08:00
parent f09637186d
commit cf49864327
3 changed files with 31 additions and 11 deletions
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24
sim_BuildROMs.c
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@@ -55,6 +55,7 @@
int sim_make_ROM_include(const char *rom_filename,
int expected_size,
int expected_checksum,
const char *include_filename,
const char *rom_array_name)
{
@@ -65,6 +66,7 @@ int bytes_written = 0;
int c;
struct stat statb;
unsigned char *ROMData = NULL;
unsigned int checksum = 0;
if (NULL == (rFile = fopen (rom_filename, "rb"))) {
printf ("Error Opening '%s' for input: %s\n", rom_filename, strerror(errno));
@@ -76,7 +78,7 @@ if (stat (rom_filename, &statb)) {
return -1;
}
if (statb.st_size != expected_size) {
printf ("Error: ROM file '%s' has an unexpected size: %d vs %d\n", (int)statb.st_size, expected_size);
printf ("Error: ROM file '%s' has an unexpected size: %d vs %d\n", rom_filename, (int)statb.st_size, expected_size);
printf ("This can happen if the file was transferred or unpacked incorrectly\n");
printf ("and in the process tried to convert line endings rather than passing\n");
printf ("the file's contents unmodified\n");
@@ -91,6 +93,17 @@ if (statb.st_size != fread (ROMData, sizeof(*ROMData), statb.st_size, rFile)) {
return -1;
}
fclose (rFile);
for (c=0; c<statb.st_size; ++c)
checksum += ROMData[c];
checksum = ~checksum;
if ((expected_checksum != 0) && (checksum != expected_checksum)) {
printf ("Error: ROM file '%s' has an unexpected checksum: 0x%08X vs 0x%08X\n", rom_filename, checksum, expected_checksum);
printf ("This can happen if the file was transferred or unpacked incorrectly\n");
printf ("and in the process tried to convert line endings rather than passing\n");
printf ("the file's contents unmodified\n");
fclose (rFile);
return -1;
}
/*
* If the target include file already exists, determine if it contains the exact
* data in the base ROM image. If so, then we are already done
@@ -139,7 +152,7 @@ fprintf (iFile, "#define ROM_%s_H 0\n", rom_array_name);
fprintf (iFile, "/*\n");
fprintf (iFile, " %s produced at %s", include_filename, ctime(&now));
fprintf (iFile, " from %s which was last modified at %s", rom_filename, ctime(&statb.st_mtime));
fprintf (iFile, " file size: %d (0x%X)\n", (int)statb.st_size, (int)statb.st_size);
fprintf (iFile, " file size: %d (0x%X) - checksum: 0x%08X\n", (int)statb.st_size, (int)statb.st_size, checksum);
fprintf (iFile, "*/\n");
fprintf (iFile, "unsigned char %s[] = {", rom_array_name);
for (bytes_written=0;bytes_written<statb.st_size; ++bytes_written) {
@@ -165,7 +178,8 @@ return 0;
int
main(int argc, char **argv)
{
sim_make_ROM_include ("VAX/ka655x.bin", 131072, "VAX/vax_ka655x_bin.h", "vax_ka655x_bin");
sim_make_ROM_include ("VAX/vmb.exe", 44544, "VAX/vax780_vmb_exe.h", "vax780_vmb_exe");
exit(0);
int status = 0;
status += sim_make_ROM_include ("VAX/ka655x.bin", 131072, 0xFF7673B6, "VAX/vax_ka655x_bin.h", "vax_ka655x_bin");
status += sim_make_ROM_include ("VAX/vmb.exe", 44544, 0xFFC014CC, "VAX/vax780_vmb_exe.h", "vax780_vmb_exe");
exit((status == 0) ? 0 : 1);
}