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/*
* <xcoff.c>
*
* Open Hack'Ware BIOS XCOFF executable file loader
*
* Copyright (c) 2004-2005 Jocelyn Mayer
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License V2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include "bios.h"
#include "exec.h"
uint32_t fs_inode_get_size (inode_t *inode);
/* XCOFF executable loader */
typedef struct COFF_filehdr_t {
uint16_t f_magic; /* magic number */
uint16_t f_nscns; /* number of sections */
uint32_t f_timdat; /* time & date stamp */
uint32_t f_symptr; /* file pointer to symtab */
uint32_t f_nsyms; /* number of symtab entries */
uint16_t f_opthdr; /* sizeof(optional hdr) */
uint16_t f_flags; /* flags */
} COFF_filehdr_t;
/* IBM RS/6000 */
#define U802WRMAGIC 0730 /* writeable text segments **chh** */
#define U802ROMAGIC 0735 /* readonly sharable text segments */
#define U802TOCMAGIC 0737 /* readonly text segments and TOC */
/*
* Bits for f_flags:
*
* F_RELFLG relocation info stripped from file
* F_EXEC file is executable (i.e. no unresolved external
* references)
* F_LNNO line numbers stripped from file
* F_LSYMS local symbols stripped from file
* F_MINMAL this is a minimal object file (".m") output of fextract
* F_UPDATE this is a fully bound update file, output of ogen
* F_SWABD this file has had its bytes swabbed (in names)
* F_AR16WR this file has the byte ordering of an AR16WR
* (e.g. 11/70) machine
* F_AR32WR this file has the byte ordering of an AR32WR machine
* (e.g. vax and iNTEL 386)
* F_AR32W this file has the byte ordering of an AR32W machine
* (e.g. 3b,maxi)
* F_PATCH file contains "patch" list in optional header
* F_NODF (minimal file only) no decision functions for
* replaced functions
*/
#define COFF_F_RELFLG 0000001
#define COFF_F_EXEC 0000002
#define COFF_F_LNNO 0000004
#define COFF_F_LSYMS 0000010
#define COFF_F_MINMAL 0000020
#define COFF_F_UPDATE 0000040
#define COFF_F_SWABD 0000100
#define COFF_F_AR16WR 0000200
#define COFF_F_AR32WR 0000400
#define COFF_F_AR32W 0001000
#define COFF_F_PATCH 0002000
#define COFF_F_NODF 0002000
typedef struct COFF_aouthdr_t {
uint16_t magic; /* type of file */
uint16_t vstamp; /* version stamp */
uint32_t tsize; /* text size in bytes, padded to FW bdry */
uint32_t dsize; /* initialized data " " */
uint32_t bsize; /* uninitialized data " " */
uint32_t entry; /* entry pt. */
uint32_t text_start; /* base of text used for this file */
uint32_t data_start; /* base of data used for this file */
uint32_t o_toc; /* address of TOC */
uint16_t o_snentry; /* section number of entry point */
uint16_t o_sntext; /* section number of .text section */
uint16_t o_sndata; /* section number of .data section */
uint16_t o_sntoc; /* section number of TOC */
uint16_t o_snloader; /* section number of .loader section */
uint16_t o_snbss; /* section number of .bss section */
uint16_t o_algntext; /* .text alignment */
uint16_t o_algndata; /* .data alignment */
uint16_t o_modtype; /* module type (??) */
uint16_t o_cputype; /* cpu type */
uint32_t o_maxstack; /* max stack size (??) */
uint32_t o_maxdata; /* max data size (??) */
char o_resv2[12]; /* reserved */
} COFF_aouthdr_t;
#define AOUT_MAGIC 0x010b
typedef struct COFF_scnhdr_t {
char s_name[8]; /* section name */
uint32_t s_paddr; /* physical address, aliased s_nlib */
uint32_t s_vaddr; /* virtual address */
uint32_t s_size; /* section size */
uint32_t s_scnptr; /* file ptr to raw data for section */
uint32_t s_relptr; /* file ptr to relocation */
uint32_t s_lnnoptr; /* file ptr to line numbers */
uint16_t s_nreloc; /* number of relocation entries */
uint16_t s_nlnno; /* number of line number entries */
uint32_t s_flags; /* flags */
} COFF_scnhdr_t;
int exec_load_xcoff (inode_t *file, void **dest, void **entry, void **end,
uint32_t loffset)
{
COFF_filehdr_t fhdr;
COFF_aouthdr_t ahdr;
COFF_scnhdr_t shdr;
void *first, *last;
uint32_t offset;
int i;
file_seek(file, loffset);
if (fs_read(file, &fhdr, sizeof(COFF_filehdr_t)) < 0) {
ERROR("Cannot load first bloc of file...\n");
return -1;
}
if (fhdr.f_magic != U802WRMAGIC && fhdr.f_magic != U802ROMAGIC &&
fhdr.f_magic != U802TOCMAGIC && fhdr.f_magic != 0x01DF) {
DPRINTF("Not a XCOFF file %02x %08x\n", fhdr.f_magic,
*(uint32_t *)&fhdr.f_magic);
return -2;
}
if (fhdr.f_magic != 0x01DF && (fhdr.f_flags & COFF_F_EXEC) == 0) {
ERROR("Not an executable XCOFF file %02x\n", fhdr.f_flags);
return -2;
}
if (fhdr.f_opthdr != sizeof(COFF_aouthdr_t)) {
ERROR("AOUT optional error size missmactch in XCOFF file\n");
return -2;
}
if (fs_read(file, &ahdr, sizeof(COFF_aouthdr_t)) < 0) {
ERROR("Cannot load XCOFF AOUT header...\n");
return -1;
}
if (ahdr.magic != AOUT_MAGIC) {
ERROR("Invalid AOUT optional header\n");
return -2;
}
#if 0 // XXX: buggy: this makes NetBSD fail to boot
if (fhdr.f_magic == 0x01DF) {
/* Load embedded file */
return _bootfile_load(file, dest, entry, end, loffset +
sizeof(COFF_filehdr_t) + sizeof(COFF_aouthdr_t) +
(fhdr.f_nscns * sizeof(COFF_scnhdr_t)),
-1);
}
#endif
*entry = (void *)ahdr.entry + 0xC;
last = NULL;
first = last - 4;
offset = sizeof(COFF_filehdr_t) + sizeof(COFF_aouthdr_t);
DPRINTF("XCOFF file with %d sections entry:%p\n", fhdr.f_nscns, *entry);
for (i = 0; i < fhdr.f_nscns; i++) {
DPRINTF("Read next header (%0x)\n", offset);
file_seek(file, offset + loffset);
if (fs_read(file, &shdr, sizeof(COFF_scnhdr_t)) < 0) {
ERROR("Cannot load section header %d...\n", i);
return -1;
}
if (strcmp(shdr.s_name, ".text") == 0 ||
strcmp(shdr.s_name, ".data") == 0) {
if ((void *)shdr.s_vaddr < first)
first = (void *)shdr.s_vaddr;
if ((void *)shdr.s_vaddr > last)
last = (void *)shdr.s_vaddr;
DPRINTF("Load '%s' section from %0x %0x to %0x (%0x)\n",
shdr.s_name, offset, shdr.s_scnptr,
shdr.s_vaddr, shdr.s_size);
#if 0
if (shdr.s_scnptr + shdr.s_size > fs_inode_get_size(file)) {
ERROR("Section %d data offset > file size\n", i);
return -1;
}
#endif
file_seek(file, shdr.s_scnptr + loffset);
set_loadinfo((void *)first, last - first);
if (fs_read(file, (void *)shdr.s_vaddr, shdr.s_size) < 0) {
ERROR("Cannot load section %d...\n", i);
return -1;
}
} else if (strcmp(shdr.s_name, ".bss") == 0) {
if ((void *)shdr.s_vaddr < first)
first = (void *)shdr.s_vaddr;
if ((void *)shdr.s_vaddr > last)
last = (void *)shdr.s_vaddr;
DPRINTF("Erase '%s' section at %0x size: %0x\n",
shdr.s_name, shdr.s_vaddr, shdr.s_size);
memset((void *)shdr.s_vaddr, 0, shdr.s_size);
} else {
DPRINTF("Skip '%s' section\n", shdr.s_name);
}
offset += sizeof(COFF_scnhdr_t);
}
*dest = first;
*end = last;
return 0;
}
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