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DISK: Avoid disk capacity overflow on hosts with 32bit file offset limitations

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As discussed in #768
This commit is contained in:
Mark Pizzolato 2019-11-16 18:24:37 -08:00
parent 318b0e32bb
commit 39fd8d829b
1 changed files with 8 additions and 8 deletions
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16
sim_disk.c
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@ -1110,7 +1110,7 @@ static t_offset get_ods2_filesystem_size (UNIT *uptr)
DEVICE *dptr;
t_addr saved_capac;
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
t_offset temp_capac = 512 * (t_offset)0xFFFFFFFFu; /* Make sure we can access the largest sector */
t_addr temp_capac = (sim_toffset_64 ? (t_addr)0xFFFFFFFFu : (t_addr)0x7FFFFFFFu); /* Make sure we can access the largest sector */
uint32 capac_factor;
ODS2_HomeBlock Home;
ODS2_FileHeader Header;
@ -1125,7 +1125,7 @@ if ((dptr = find_dev_from_unit (uptr)) == NULL)
return ret_val;
capac_factor = ((dptr->dwidth / dptr->aincr) == 16) ? 2 : 1; /* save capacity units (word: 2, byte: 1) */
saved_capac = uptr->capac;
uptr->capac = (t_addr)(temp_capac/(capac_factor*((dptr->flags & DEV_SECTORS) ? 512 : 1)));
uptr->capac = (t_addr)(temp_capac/(capac_factor*((dptr->flags & DEV_SECTORS) ? 1 : 512)));
if ((sim_disk_rdsect (uptr, 512 / ctx->sector_size, (uint8 *)&Home, &sects_read, sizeof (Home) / ctx->sector_size)) ||
(sects_read != (sizeof (Home) / ctx->sector_size)))
goto Return_Cleanup;
@ -1197,7 +1197,7 @@ static t_offset get_ods1_filesystem_size (UNIT *uptr)
DEVICE *dptr;
t_addr saved_capac;
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
t_offset temp_capac = 512 * (t_offset)0xFFFFFFFFu; /* Make sure we can access the largest sector */
t_addr temp_capac = (sim_toffset_64 ? (t_addr)0xFFFFFFFFu : (t_addr)0x7FFFFFFFu); /* Make sure we can access the largest sector */
uint32 capac_factor;
ODS1_HomeBlock Home;
ODS1_FileHeader Header;
@ -1213,7 +1213,7 @@ if ((dptr = find_dev_from_unit (uptr)) == NULL)
return ret_val;
capac_factor = ((dptr->dwidth / dptr->aincr) == 16) ? 2 : 1; /* save capacity units (word: 2, byte: 1) */
saved_capac = uptr->capac;
uptr->capac = (t_addr)(temp_capac/(capac_factor*((dptr->flags & DEV_SECTORS) ? 512 : 1)));
uptr->capac = (t_addr)(temp_capac/(capac_factor*((dptr->flags & DEV_SECTORS) ? 1 : 512)));
if ((sim_disk_rdsect (uptr, 512 / ctx->sector_size, (uint8 *)&Home, &sects_read, sizeof (Home) / ctx->sector_size)) ||
(sects_read != (sizeof (Home) / ctx->sector_size)))
goto Return_Cleanup;
@ -1274,7 +1274,7 @@ static t_offset get_ultrix_filesystem_size (UNIT *uptr)
DEVICE *dptr;
t_addr saved_capac;
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
t_offset temp_capac = 512 * (t_offset)0xFFFFFFFFu; /* Make sure we can access the largest sector */
t_addr temp_capac = (sim_toffset_64 ? (t_addr)0xFFFFFFFFu : (t_addr)0x7FFFFFFFu); /* Make sure we can access the largest sector */
uint32 capac_factor;
uint8 sector_buf[512];
ultrix_disklabel *Label = (ultrix_disklabel *)(sector_buf + sizeof (sector_buf) - sizeof (ultrix_disklabel));
@ -1287,7 +1287,7 @@ if ((dptr = find_dev_from_unit (uptr)) == NULL)
return ret_val;
capac_factor = ((dptr->dwidth / dptr->aincr) == 16) ? 2 : 1; /* save capacity units (word: 2, byte: 1) */
saved_capac = uptr->capac;
uptr->capac = (t_addr)(temp_capac/(capac_factor*((dptr->flags & DEV_SECTORS) ? 512 : 1)));
uptr->capac = (t_addr)(temp_capac/(capac_factor*((dptr->flags & DEV_SECTORS) ? 1 : 512)));
if ((sim_disk_rdsect (uptr, 31 * (512 / ctx->sector_size), sector_buf, &sects_read, 512 / ctx->sector_size)) ||
(sects_read != (512 / ctx->sector_size)))
goto Return_Cleanup;
@ -1393,7 +1393,7 @@ static t_offset get_rt11_filesystem_size (UNIT *uptr)
DEVICE *dptr;
t_addr saved_capac;
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
t_offset temp_capac = 512 * (t_offset)0xFFFFFFFFu;
t_addr temp_capac = (sim_toffset_64 ? (t_addr)0xFFFFFFFFu : (t_addr)0x7FFFFFFFu); /* Make sure we can access the largest sector */
uint32 capac_factor;
uint8 sector_buf[1024];
RT11_HomeBlock Home;
@ -1411,7 +1411,7 @@ if ((dptr = find_dev_from_unit (uptr)) == NULL)
return ret_val;
capac_factor = ((dptr->dwidth / dptr->aincr) == 16) ? 2 : 1;
saved_capac = uptr->capac;
uptr->capac = (t_addr)(temp_capac / (capac_factor * ((dptr->flags & DEV_SECTORS) ? 512 : 1)));
uptr->capac = (t_addr)(temp_capac / (capac_factor * ((dptr->flags & DEV_SECTORS) ? 1 : 512)));
for (part = 0; part < RT11_MAXPARTITIONS; part++) {
uint16 seg_highest;