/* * * * 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 #include #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; }