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Adapted HP-PA boot sector code to upcomming PALO header version 5

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This commit is contained in:
Thomas Schmitt 2014-01-16 11:59:58 +01:00
parent 7637d13e11
commit d51cefb097
4 changed files with 170 additions and 23 deletions
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121
doc/boot_sectors.txt
View File

@ -33,7 +33,8 @@ PowerPC Reference Platform (PReP), for IBM PowerPC
Common Hardware Reference Platform (CHRP), for IBM PowerPC
HP-PA via PALO
HP-PA via PALO header version 4
HP-PA via PALO header version 5
Combinations of boot mechanisms:
- SYSLINUX isohybrid MBR
@ -949,7 +950,7 @@ in the ISO image [without causing overlapping between partitions].
------------------------------------------------------------------------------
HP-PA via PALO
HP-PA via PALO header version 4
for HP PA-RISC
Sources:
@ -970,8 +971,10 @@ Boot sector components:
Byte Range | Value | Meaning
---------- | ---------- | ----------------------------------------------------
0 - 1 | 0x8000 | Magic
2 - 5 | "PALO" |
6 - 7 | 0x0004 | Version
| |
2 - 6 | "PALO" | Zero terminated string
| |
7 - 7 | 4 | Version
| |
8 - 11 | kern32_adr | Byte address of the "HPPA 32-bit kernel" file
| | genisoimage option -hppa-kernel-32
@ -995,6 +998,116 @@ Byte Range | Value | Meaning
---------- | ---------- | ----------------------------------------------------
------------------------------------------------------------------------------
HP-PA via PALO header version 5
for HP PA-RISC
Sources:
Public mail conversations with Helge Deller, beginning with
https://lists.debian.org/debian-hppa/2014/01/msg00016.html
http://git.kernel.org/cgit/linux/kernel/git/deller/palo.git/tree/lib/
(especially struct firstblock in common.h and struct partition in part.h)
There are five parameters which get encoded into the first 248 bytes of the
System Area: cmdline, bootloader, 32-bit kernel, 64-bit kernel, and ramdisk.
They are all mandatory.
While cmdline is simply a string of at most 1023 characters, the other four
point to data files inside the ISO image.
Several fields of the firstblock shall be hardcoded to 0, on advise of
Helge Deller. Their description is shown in round brackets.
The partition table format is the same as with MBR.
>>> ??? what block range gets marked in which partition ?
>>> If this is only for CD/DVD/BD images, then no partitioning is needed.
All numbers are recorded big endian.
Except flags, all 4-byte integers are signed.
Boot sector components:
Byte Range | Value | Meaning
---------- | ---------- | ----------------------------------------------------
0 - 1 | 0x8000 | Magic
| |
2 - 6 | "PALO" | Zero terminated string
| |
7 - 7 | 5 | Version
| |
8 - 11 | kern32_adr | Byte address of the 32-bit kernel file
| |
12 - 15 | kern32_len | Byte count of the 32-bit kernel file
| |
16 - 19 | ramdsk_adr | Byte address of the ramdisk file
| |
20 - 23 | ramdsk_len | Byte count of the ramdisk file
| |
24 - 141 | 0 | All 0s. Old command line of version 4.
| |
| |
220 - 223 | 0 | (Length of uncompressed 32-bit kernel)
| |
224 - 227 | 0 | (Length of uncompressed 64-bit kernel)
| |
228 - 231 | 0 | (flags)
| |
232 - 235 | kern64_adr | Byte address of the 64-bit kernel file
| |
236 - 239 | kern64_len | Byte count of the 64-bit kernel file
| |
240 - 243 | ipl_adr | Byte address of the bootloader file
| |
244 - 247 | ipl_len | Byte count of the bootloader file
| |
248 - 251 | ipl_entry | >>> Meaning unclear
| |
| |
446 - 461 | ========== | MBR/DOS Partition Table Entry for partition 1
| |
446 - 446 | status | Governs bootability:
| | 0x80 = bootable/active , 0x00 non-bootable/inactive
| |
447 - 449 | ========== | C/H/S address of partition start
447 - 447 | start_head | Heads part of start address.
448 - 448 | start_c_s | Bits 0 to 5 : Sectors part of start address.
| | Bits 6 to 7 : Bits 8 to 9 of cylinders part.
449 - 449 | start_cyl | Lower 8 bits of cylinders part of start address
| |
450 - 450 | part_type | Partition type indicates the purpose or kind of
| | filesystem in the partition.
| |
451 - 453 | ========== | C/H/S address of last absolute sector in partition
451 - 451 | end_head | Heads part of end address.
452 - 452 | end_c_s | Bits 0 to 5 : Sectors part of end address.
| Values: 1 to 63, not 0.
| | Bits 6 to 7 : Bits 8 to 9 of cylinders part.
453 - 453 | end_cyl | Lower 8 bits of cylinders part of end address
| |
454 - 457 | start_lba | LBA of first absolute sector in partiton.
| | Block size is 512. Counting starts at 0.
| |
458 - 461 | num_blocks | Number of sectors in partition.
| |
462 - 477 | ========== | Partition Table Entry for partition 2
| part_entr2 | 16 bytes. Format as with partition 1.
| | All 0 means that partition is unused/undefined.
| |
478 - 493 | ========== | Partition Table Entry for partition 3
| part_entr3 | 16 bytes. See above.
| |
494 - 509 | ========== | Partition Table Entry for partition 4
| part_entr4 | 16 bytes. See above.
| |
510 - 510 | 0x55 | MBR signature
511 - 511 | 0xaa | MBR signature
| |
| |
1024 -2047 | cmdline | Zero terminated command line of up to
| | 1023 characters
| |
---------- | ---------- | ----------------------------------------------------
------------------------------------------------------------------------------

10
libisofs/libisofs.h
View File

@ -2185,8 +2185,14 @@ int iso_write_opts_set_fifo_size(IsoWriteOpts *opts, size_t fifo_size);
* to 8.
* This will overwrite the first 512 bytes of the submitted
* data.
* 4= HP-PA PALO boot sector for HP PA-RISC
* 4= HP-PA PALO boot sector version 4 for HP PA-RISC
* @since 1.3.6
* Suitable for older PALO of e.g. Debian 4 and 5.
* Submit all five parameters of iso_image_set_hppa_palo():
* cmdline, bootloader, kernel_32, kernel_64, ramdisk
* 5= HP-PA PALO boot sector version 5 for HP PA-RISC
* Suitable for newer PALO, where PALOHDRVERSION in
* lib/common.h is defined as 5.
* Submit all five parameters of iso_image_set_hppa_palo():
* cmdline, bootloader, kernel_32, kernel_64, ramdisk
* bit8-9= Only with System area type 0 = MBR
@ -7672,7 +7678,7 @@ int iso_conv_name_chars(IsoWriteOpts *opts, char *name, size_t name_len,
/** Incomplete HP-PA PALO boot parameters (FAILURE, HIGH, -399) */
#define ISO_HPPA_PALO_INCOMPL 0xE830FE71
/** HP-PA PALO boot address exceeds 32 bit (FAILURE, HIGH, -400) */
/** HP-PA PALO boot address exceeds 2 GB (FAILURE, HIGH, -400) */
#define ISO_HPPA_PALO_OFLOW 0xE830FE70
/** HP-PA PALO file is not a data file (FAILURE, HIGH, -401) */

2
libisofs/messages.c
View File

@ -510,7 +510,7 @@ const char *iso_error_to_msg(int errcode)
case ISO_HPPA_PALO_INCOMPL:
return "Incomplete HP-PA PALO boot parameters";
case ISO_HPPA_PALO_OFLOW:
return "HP-PA PALO boot address exceeds 32 bit";
return "HP-PA PALO boot address exceeds 2 GB";
case ISO_HPPA_PALO_NOTREG:
return "HP-PA PALO file is not a data file";
case ISO_HPPA_PALO_CMDLEN:

60
libisofs/system_area.c
View File

@ -783,9 +783,9 @@ static int hppa_palo_get_filepar(Ecma119Image *t, char *path,
return ISO_HPPA_PALO_NOTREG;
}
adr64 = ((off_t) 2048) * (off_t) ecma_node->info.file->sections[0].block;
if (adr64 > 0xffffffff) {
if (adr64 > 0x7fffffff) {
iso_msg_submit(t->image->id, ISO_HPPA_PALO_OFLOW, 0,
"HP-PA PALO boot address exceeds 32 bit");
"HP-PA PALO boot address exceeds 2 GB");
return ISO_HPPA_PALO_OFLOW;
}
*adr = adr64;
@ -800,15 +800,18 @@ static int hppa_palo_get_filepar(Ecma119Image *t, char *path,
* learned from cdrkit-1.1.10/genisoimage/boot-hppa.c
* by Steve McIntyre <steve@einval.com>
* who states "Heavily inspired by palo"
* Public mail conversations with Helge Deller, beginning with
* https://lists.debian.org/debian-hppa/2014/01/msg00016.html
* http://git.kernel.org/cgit/linux/kernel/git/deller/palo.git/tree/lib/
* (especially struct firstblock in common.h and struct partition in part.h)
*
*/
static int make_hppa_palo_sector(Ecma119Image *t, uint8_t *buf, int flag)
static int make_hppa_palo_sector(Ecma119Image *t, uint8_t *buf, int hdrversion,
int flag)
{
int ret;
IsoImage *img;
uint32_t adr, len;
/* Bytes 256 to 32767 may come from image or external file */
memset(buf, 0, 256);
img = t->image;
if (img->hppa_cmdline == NULL && img->hppa_bootloader == NULL &&
@ -822,13 +825,25 @@ static int make_hppa_palo_sector(Ecma119Image *t, uint8_t *buf, int flag)
"Incomplete HP-PA PALO boot parameters");
return ISO_HPPA_PALO_INCOMPL;
}
if (hdrversion == 4) {
/* Bytes 256 to 32767 may come from loaded ISO image or external file */
memset(buf, 0, 256);
} else if(hdrversion == 5) {
memset(buf, 0, 512);
memset(buf + 1024, 0, 1024);
} else {
iso_msg_submit(img->id, ISO_WRONG_ARG_VALUE, 0,
"Unsupported HP-PA PALO header version %d (can do 4 or 5)",
hdrversion);
return ISO_WRONG_ARG_VALUE;
}
/* Magic */
iso_msb(buf + 0, 0x8000, 2);
/* Name of boot loader */
memcpy(buf + 2, "PALO", 4);
memcpy(buf + 2, "PALO", 5);
/* Version */
iso_msb(buf + 6, 0x0004, 2);
buf[7] = hdrversion;
/* Byte address and byte count of the "HPPA 32-bit kernel" file
*/
@ -846,13 +861,15 @@ static int make_hppa_palo_sector(Ecma119Image *t, uint8_t *buf, int flag)
iso_msb(buf + 16, adr, 4);
iso_msb(buf + 20, len, 4);
/* "Command line" */
if (strlen(img->hppa_cmdline) > 127) {
iso_msg_submit(img->id, ISO_HPPA_PALO_CMDLEN, 0,
"HP-PA PALO command line too long");
return ISO_HPPA_PALO_CMDLEN;
if (hdrversion == 4) {
/* "Command line" */
if (strlen(img->hppa_cmdline) > 127) {
iso_msg_submit(img->id, ISO_HPPA_PALO_CMDLEN, 0,
"HP-PA PALO command line too long");
return ISO_HPPA_PALO_CMDLEN;
}
memcpy(buf + 24, img->hppa_cmdline, strlen(img->hppa_cmdline) + 1);
}
memcpy(buf + 24, img->hppa_cmdline, strlen(img->hppa_cmdline) + 1);
/* Byte address and byte count of the "HPPA 64-bit kernel" file
*/
@ -870,6 +887,16 @@ static int make_hppa_palo_sector(Ecma119Image *t, uint8_t *buf, int flag)
iso_msb(buf + 240, adr, 4);
iso_msb(buf + 244, len, 4);
/* >>> ??? iso_msb(buf + 248, ipl_entry, 4); */
if (hdrversion == 5) {
if (strlen(img->hppa_cmdline) > 1023) {
iso_msg_submit(img->id, ISO_HPPA_PALO_CMDLEN, 0,
"HP-PA PALO command line too long");
return ISO_HPPA_PALO_CMDLEN;
}
memcpy(buf + 1024, img->hppa_cmdline, strlen(img->hppa_cmdline) + 1);
}
return ISO_SUCCESS;
}
@ -1698,8 +1725,9 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
ret = make_sun_disk_label(t, buf, 0);
if (ret != ISO_SUCCESS)
return ret;
} else if (sa_type == 4) {
ret = make_hppa_palo_sector(t, buf, 0);
} else if (sa_type == 4 || sa_type == 5) {
/* (By coincidence, sa_type and PALO header versions match) */
ret = make_hppa_palo_sector(t, buf, sa_type, 0);
if (ret != ISO_SUCCESS)
return ret;
} else if ((t->opts->partition_offset > 0 || will_append) &&