From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/roms/ipxe/src/image/segment.c | 91 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 qemu/roms/ipxe/src/image/segment.c (limited to 'qemu/roms/ipxe/src/image/segment.c') diff --git a/qemu/roms/ipxe/src/image/segment.c b/qemu/roms/ipxe/src/image/segment.c new file mode 100644 index 000000000..86fe42662 --- /dev/null +++ b/qemu/roms/ipxe/src/image/segment.c @@ -0,0 +1,91 @@ +/* + * Copyright (C) 2007 Michael Brown . + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +/** + * @file + * + * Executable image segments + * + */ + +#include +#include +#include +#include +#include + +/** + * Segment-specific error messages + * + * This error happens sufficiently often to merit a user-friendly + * description. + */ +#define ERANGE_SEGMENT __einfo_error ( EINFO_ERANGE_SEGMENT ) +#define EINFO_ERANGE_SEGMENT \ + __einfo_uniqify ( EINFO_ERANGE, 0x01, "Requested memory not available" ) +struct errortab segment_errors[] __errortab = { + __einfo_errortab ( EINFO_ERANGE_SEGMENT ), +}; + +/** + * Prepare segment for loading + * + * @v segment Segment start + * @v filesz Size of the "allocated bytes" portion of the segment + * @v memsz Size of the segment + * @ret rc Return status code + */ +int prep_segment ( userptr_t segment, size_t filesz, size_t memsz ) { + struct memory_map memmap; + physaddr_t start = user_to_phys ( segment, 0 ); + physaddr_t mid = user_to_phys ( segment, filesz ); + physaddr_t end = user_to_phys ( segment, memsz ); + unsigned int i; + + DBG ( "Preparing segment [%lx,%lx,%lx)\n", start, mid, end ); + + /* Sanity check */ + if ( filesz > memsz ) { + DBG ( "Insane segment [%lx,%lx,%lx)\n", start, mid, end ); + return -EINVAL; + } + + /* Get a fresh memory map. This allows us to automatically + * avoid treading on any regions that Etherboot is currently + * editing out of the memory map. + */ + get_memmap ( &memmap ); + + /* Look for a suitable memory region */ + for ( i = 0 ; i < memmap.count ; i++ ) { + if ( ( start >= memmap.regions[i].start ) && + ( end <= memmap.regions[i].end ) ) { + /* Found valid region: zero bss and return */ + memset_user ( segment, filesz, 0, ( memsz - filesz ) ); + return 0; + } + } + + /* No suitable memory region found */ + DBG ( "Segment [%lx,%lx,%lx) does not fit into available memory\n", + start, mid, end ); + return -ERANGE_SEGMENT; +} -- cgit 1.2.3-korg