09140ab2c1
Provide DBGC_MEMMAP() as a replacement for memmap_dump(), allowing the colour used to match other messages within the same message group. Retain a dedicated colour for output from memmap_dump_all(), on the basis that it is generally most useful to visually compare full memory dumps against previous full memory dumps. Signed-off-by: Michael Brown <mcb30@ipxe.org>
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/**
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* @file
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*
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* Executable image segments
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*
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*/
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#include <string.h>
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#include <errno.h>
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#include <ipxe/uaccess.h>
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#include <ipxe/memmap.h>
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#include <ipxe/errortab.h>
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#include <ipxe/segment.h>
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/**
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* Segment-specific error messages
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*
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* This error happens sufficiently often to merit a user-friendly
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* description.
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*/
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#define ERANGE_SEGMENT __einfo_error ( EINFO_ERANGE_SEGMENT )
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#define EINFO_ERANGE_SEGMENT \
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__einfo_uniqify ( EINFO_ERANGE, 0x01, "Requested memory not available" )
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struct errortab segment_errors[] __errortab = {
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__einfo_errortab ( EINFO_ERANGE_SEGMENT ),
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};
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/**
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* Prepare segment for loading
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*
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* @v segment Segment start
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* @v filesz Size of the "allocated bytes" portion of the segment
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* @v memsz Size of the segment
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* @ret rc Return status code
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*/
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int prep_segment ( void *segment, size_t filesz, size_t memsz ) {
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struct memmap_region region;
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physaddr_t start = virt_to_phys ( segment );
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physaddr_t mid = ( start + filesz );
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physaddr_t end = ( start + memsz );
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physaddr_t max;
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DBGC ( segment, "SEGMENT [%#08lx,%#08lx,%#08lx)\n", start, mid, end );
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/* Check for malformed lengths */
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if ( filesz > memsz ) {
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DBGC ( segment, "SEGMENT [%#08lx,%#08lx,%#08lx) is "
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"malformed\n", start, mid, end );
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return -EINVAL;
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}
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/* Zero-length segments do not need a memory region */
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if ( memsz == 0 )
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return 0;
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max = ( end - 1 );
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/* Check for address space overflow */
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if ( max < start ) {
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DBGC ( segment, "SEGMENT [%#08lx,%#08lx,%#08lx) wraps "
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"around\n", start, mid, end );
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return -EINVAL;
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}
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/* Describe region containing this segment */
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memmap_describe ( start, 1, ®ion );
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DBGC_MEMMAP ( segment, ®ion );
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/* Fail unless region is usable and sufficiently large */
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if ( ( ! memmap_is_usable ( ®ion ) ) || ( region.max < max ) ) {
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DBGC ( segment, "SEGMENT [%#08lx,%#08lx,%#08lx) does not fit "
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"into available memory\n", start, mid, end );
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return -ERANGE_SEGMENT;
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}
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/* Found valid region: zero bss and return */
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memset ( ( segment + filesz ), 0, ( memsz - filesz ) );
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return 0;
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}
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